JP5374826B2 - Multilayer laminated film - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a multilayered laminated film capable of substituting a light barrier function born by an aluminum foil or the like, capable of contributing to classification and recycling, using a raw material originating from a plant by using no fossil raw material to contribute to the reduction of CO<SB>2</SB>, sufficiently functioning as a packaging sealant material, excellent in hermetical closing properties and content protecting properties and mainly useful for the filling and packaging with food or the like. <P>SOLUTION: The multilayered laminated film has at least a light barrier polylactic acid resin layer consisting of a resin composition based on a polylactic acid resin and containing a black pigment. Alternatively, the multilayered laminated film has at least a light barrier polylactic acid resin layer consisting of a resin composition based on a polylactic acid resin and containing a black pigment and a white pigment and characterized in that the content of the black pigment is 0.1-5.0 wt.% of the polylactic acid resin and the content of the white pigment is 1-30 times of that of the black pigment. <P>COPYRIGHT: (C)2009,JPO&amp;INPIT

Description

  The present invention relates to a multilayer laminated film. More specifically, the present invention is mainly composed of polylactic acid resin, functions as a packaging sealant material, has light-shielding properties, etc., has excellent hermeticity, and is suitable for content protection. In addition, it is biodegradable, has excellent disposal properties, has excellent cosmetic properties, and does not impair the appearance of the package, and has motivated consumers to purchase mainly food, snacks, The present invention relates to a multilayer laminated film useful for filling and packaging oils and fats, frozen foods, chemical products, medical products, and the like.

Conventionally, as a laminated film filling and packaging foods, snacks, fats and oils, frozen foods, chemicals, medical products, etc., the contents are protected, especially from the ultraviolet region to the visible region as a measure to prevent fat oxidation. A light shielding property for shielding sunlight or fluorescence is required.
Thus far, as the light-shielding material, aluminum foil or an aluminum vapor deposition film has been used as the most common material.
By the way, when the above aluminum foil or aluminum vapor deposition film is used, the aluminum foil, aluminum vapor deposition film or the like has a barrier property to prevent the transmission of oxygen gas, water vapor and the like, and also has a light shielding property such as sunlight or fluorescence. Therefore, although it is an extremely useful material, aluminum foil or the like lacks bending resistance, and therefore, not only has a problem that pinholes are easily generated and the barrier property is impaired, but also as a packaging container. When the waste is disposed of as waste after use, for example, when it is disposed of by incineration, etc., a metal such as aluminum remains, which may damage the incinerator, which is not suitable for disposal and has problems such as environmental destruction. This is not preferable because it has a problem in that it lacks environmental suitability and the like.
Furthermore, when using an aluminum foil or an aluminum vapor deposition film, for example, using a metal detector or the like to detect a metal piece (foreign matter) or the like mixed in the contents, There is also a problem that it is extremely difficult for the aluminum foil or the aluminum deposited film to react with a metal detector and detect the metal piece (foreign matter) for inspection.

Therefore, in recent years, instead of using the aluminum foil or aluminum deposited film as the light-shielding material, a white colorant or a black colorant is used without using these, and a white or black color containing this is used. Used as a light-shielding material because it forms a colored layer or film, and the white or black colored layer or film exhibits a light-shielding function by reflecting or absorbing sunlight or fluorescence. New technologies have been proposed.
Specifically, the content of white pigment is 5 to 20% by weight and the thickness is 10 μm or more, and the content of black pigment is 0.2 to 1.0% by weight, And the laminated film for food packaging formed by laminating the black pigment 1 with a gray film containing a white pigment at a weight ratio of 2.0 to 60 and having a thickness of 10 μm or more, There has been proposed a laminated film for food packaging in which a film layer made of an ethylene-α-olefin copolymer is laminated on the gray film side of the laminated film for food packaging (see, for example, Patent Document 1).

  Thus, the present inventor has also previously described a white resin layer comprising a resin composition containing at least a thermoplastic resin and a white colorant, and a black resin comprising a resin composition comprising at least a thermoplastic resin and a black colorant. A multilayer laminate comprising a layer and a concealing resin layer that conceals the black resin layer in the order of the concealing resin composition comprising at least a thermoplastic resin as a main component of the vehicle. A resin film, or a thermoplastic resin layer comprising a resin composition comprising at least a thermoplastic resin as a main component of a vehicle, a white resin layer comprising at least a thermoplastic resin and a white colorant, and at least a thermoplastic resin; A black resin layer comprising a resin composition comprising a black colorant, and the above-described concealing resin composition comprising at least a thermoplastic resin as a main component of the vehicle. In which proposes a multi-layer laminate resin film characterized in that it consists of construction was coextruded laminated in this order concealing resin layer to conceal the black resin layer (for example, see Patent Document 2.).

Further, the present inventor has a first white resin layer made of a resin composition containing at least a thermoplastic resin and a white colorant, a black resin layer made of a resin composition containing at least a thermoplastic resin and a black colorant, And a multilayer laminated resin film comprising a structure in which a second white resin layer is co-extruded in the order of a resin composition containing at least a thermoplastic resin and a white colorant, or at least a thermoplastic resin And a first white resin layer made of a resin composition containing a white colorant, a black resin layer made of a resin composition containing at least a thermoplastic resin and a black colorant, and at least a thermoplastic resin and a white colorant. A co-extrusion lamination of a second white resin layer comprising a resin composition containing the resin and a first thermoplastic resin layer comprising at least a thermoplastic resin as a main component of the vehicle. A multilayer laminated resin film, further comprising a second thermoplastic resin layer comprising a resin composition comprising at least a thermoplastic resin as a main component of the vehicle, at least a thermoplastic resin and a white colorant. A first white resin layer comprising a resin composition comprising, a black resin layer comprising at least a thermoplastic resin and a black colorant, and a resin composition comprising at least a thermoplastic resin and a white colorant. A multilayer laminated resin film characterized by comprising a structure in which two white resin layers and a first thermoplastic resin layer of a resin composition containing at least a thermoplastic resin as a main component of a vehicle are co-extruded and laminated in this order. It has been proposed (see, for example, Patent Document 3).
JP-A-11-91042 (Claims) JP 2003-305811 A (Claims) JP 2003-326654 A (Claims)

However, the laminated film for food packaging according to the above-mentioned Patent Document 1 is used to produce a packaging material therefrom, and then the packaging material is used to produce a bag to produce a packaging bag. Later, when the packaging bag is used to produce a packaged product by filling and packaging food, snacks, fats and oils, frozen foods, etc. In the processing process such as bag making or filling packaging, the laminating strength of the laminated film for food packaging constituting the packaging bag or the heat sealing strength of the heat sealing portion is lacking, There is a problem in that it is difficult to produce a desired packaged product due to delamination or bag breaking.
Moreover, about the laminated | multilayer film for food packaging which concerns on said patent document 1, this was used as a packaging material which wraps the photosensitive material etc. as an industrial member, and this wrapped the photosensitive material and manufactured the packaging product. However, the light shielding function is inferior, and it has been found that the above-described laminated film for food packaging cannot be used as a packaging material for packaging a photosensitive material or the like. In general, a photosensitive material is required to have a high light-shielding property (complete light-shielding) from the ultraviolet region to the visible region in order to protect contents and optical functionality.
By the way, in order to protect products such as photosensitive materials as industrial members, it is necessary to shield light rays in the entire region. It is essential and needs to be shielded with infrared light of 700 nm or more as much as possible.
Up to now, packaging materials for packaging photosensitive materials and the like have been mainly made of packaging materials made of silver base that complement the light shielding function from laminated materials of aluminum foil. is there.
However, the use of aluminum foil or the like not only has the above-mentioned problems, but also has the problem of causing deterioration of the working environment and surrounding environment due to the use of an adhesive during lamination. It is.

In addition, the multilayer laminated resin films according to Patent Documents 2 and 3 have a function as a sealant material for packaging and have a light-shielding property, etc. Although it is excellent, the use of existing plastics such as polyethylene and polypropylene made mainly from fossil raw materials leads to an increase in CO ₂ , so simply by measures and examinations such as separation and recycling, the environment There is a problem that it is insufficient for reducing the load.
Therefore, the present invention can replace the light shielding function of aluminum foil and the like, contribute to separation and recycling, and contribute to CO ₂ reduction by using plant-derived materials without using fossil materials. In addition, it has a sufficient function as a sealant material for packaging, has excellent sealing properties, is excellent in content protection, and is excellent in disposal, mainly for foods, snacks, fats and oils It is to provide a multilayer laminated film useful for filling and packaging frozen foods, chemical products, medical products, and the like.

  As a result of various studies to solve the above problems, the present inventor has at least one layer comprising a light-blocking polylactic acid resin layer made of a resin composition containing a polylactic acid resin as a main component and a black pigment. Or a multilayer laminate film, or at least one layer containing a polylactic acid resin as a main component and further containing a black pigment and a white pigment, and the content of the black pigment is 0. A multilayer laminate comprising a light-shielding polylactic acid resin layer of a resin composition comprising 1% by weight to 5.0% by weight, and the white pigment content is 1 to 30 times the black pigment content. A film is manufactured, and a transparent or translucent polylactic acid resin layer made of a resin composition containing a polylactic acid resin as a main component is laminated on both sides of the light-shielding polylactic acid resin layer, or One side or both sides of the polylactic acid resin layer contains a polylactic acid resin as a main component, further contains a white pigment, and the content of the white pigment is 5.0% by weight to 30% with respect to the polylactic acid resin. A white polylactic acid resin layer composed of 0% by weight of a resin composition is laminated to produce a multilayer laminated film, and thus the multilayer laminated film is used as a light shielding and packaging sealant material. At least one base material film is laminated on one surface of the multilayer laminated film to produce a laminated material, and then the laminated material is used to produce a desired packaging bag. The packaging bag is filled with, for example, food, snacks, fats and oils, frozen foods, chemical products, medical products, etc. to produce a packaged product. Yes, and laminating strength, -Excellent in tossal strength, etc., further having strength, etc., and excellent in fastness such as weather resistance, heat resistance, water resistance, etc., in particular, excellent in light blocking properties or light blocking properties, For example, it prevents the transmission of sunlight or fluorescent light from the sun or fluorescent lamps, and prevents the contents from being decomposed or altered, or causing light deterioration such as discoloration, etc. In particular, it has excellent utility as a packaging material for photosensitive materials as industrial members that require complete light shielding, and has excellent cosmetic properties without impairing the packaging appearance. Because of its biodegradability, when it is disposed of after use, it does not decompose in the natural environment and generates no harmful substances. Metal pieces by machine etc. The present invention has been completed by finding that a packaging bag can be easily manufactured.

  That is, in the present invention, at least one layer is composed of a polylactic acid resin as a main component, and further comprises a light-blocking polylactic acid resin layer made of a resin composition containing a black pigment, or at least one layer Is a polylactic acid resin as a main component, further contains a black pigment and a white pigment, and the content of the black pigment is 0.1% by weight to 5.0% by weight with respect to the polylactic acid resin. And a multilayer laminated film comprising a light-shielding polylactic acid resin layer made of a resin composition having a white pigment content of 1 to 30 times the black pigment content, Is a multilayer laminated film characterized by laminating a transparent or translucent polylactic acid resin layer made of a resin composition containing a polylactic acid resin as a main component on both surfaces of the light-shielding polylactic acid resin layer. Alternatively, on one side or both sides of the light-shielding polylactic acid resin layer, the main component is polylactic acid resin, and further contains a white pigment, and the content of the white pigment is 5 with respect to the polylactic acid resin. A multilayer laminated film characterized by laminating a white polylactic acid resin layer with a resin composition comprising 0.0 wt% to 30.0 wt%, and also on the surface of the white polylactic acid resin layer, The present invention relates to a multilayer laminated film characterized by laminating a transparent or translucent polylactic acid resin layer made of a resin composition containing a polylactic acid resin as a main component.

The multilayer laminated film according to the present invention acts as a heat-sealable resin layer as well as a light-shielding material, is excellent in light-shielding properties, is aluminum-free, and has a laminating strength and a heat-sensitive property. -Excellent strength, etc., and further has strength, etc., and excellent fastness such as weather resistance, heat resistance, water resistance, etc., in particular, excellent in light blocking properties or light blocking properties, for example, Blocks the transmission of sunlight or fluorescent light from the sun or fluorescent lamps, prevents the contents from being decomposed or altered, or causing light deterioration such as discoloration, etc. In particular, it has excellent suitability as a packaging material for photosensitive materials as industrial components that require complete light shielding, and has excellent cosmetics without impairing the packaging appearance. Is it degradable? It has the advantage that it does not generate harmful substances when incinerated and discarded after use, has excellent disposal suitability and environmental suitability, and is easy to detect metal fragments (foreign matter) using a metal detector. Is.
In addition, the multilayer laminated film according to the present invention uses a polylactic acid resin, and the multilayer laminated film is composed of the polylactic acid resin as a main material. Therefore, the multilayer laminated film itself has biodegradability and is decomposed in a natural environment. It has advantages.
Thus, the multilayer laminated film according to the present invention is produced by laminating at least a base film and the like to produce a laminated material. After that, the packaging bag is filled with, for example, retort food, snack confectionery, fats and oils, frozen food, chemical products, medical products, etc. A packaged product can be manufactured.

Hereinafter, the present invention will be described in more detail with reference to the drawings.
First, FIG.1, FIG.2, FIG.3, FIG.4 and FIG. 5 are schematic sectional drawings which show a few examples of the layer structure about the multilayer laminated film which concerns on this invention, FIG. 6 shows in FIG. FIG. 7 is a schematic cross-sectional view showing an example of the layer structure of the laminated material according to the present invention manufactured using the multilayer laminated film according to the present invention, and FIG. 7 uses the laminated material according to the present invention shown in FIG. FIG. 8 is a schematic perspective view showing an outline of the configuration of the packaging bag according to the present invention manufactured by bag making, and FIG. 8 shows the contents in the packaging bag according to the present invention shown in FIG. It is a schematic perspective view which shows the outline of the structure about the packaging product which filled and packaged.

  First, in the present invention, the multilayer laminated film according to the present invention will be described. As the multilayer laminated film A according to the present invention, for example, as shown in FIG. At least one layer constituting the coextruded multilayer laminated film 1 is mainly composed of a polylactic acid resin, and further, a light-shielding polylactic acid resin layer 2 made of a resin composition containing a black pigment, or at least one layer is mainly composed of a polylactic acid resin. The composition further comprises a black pigment and a white pigment, and the content of the black pigment is 0.1% to 5.0% by weight with respect to the polylactic acid resin. The basic structure consists of a light-shielding polylactic acid resin layer 2a made of a resin composition having a content of 1 to 30 times that of the black pigment.

Thus, a specific example of the multilayer laminated film according to the present invention is illustrated. As shown in FIG. 2, a light-shielding polylactic acid resin layer made of a resin composition containing a polylactic acid resin as a main component and further containing a black pigment. 2, or a polylactic acid resin as a main component, further containing a black pigment and a white pigment, and the content of the black pigment is 0.1% by weight to 5.0% with respect to the polylactic acid resin. The light-shielding polylactic acid resin layer 2a is made of a resin composition having a white pigment content of 1 to 30 times the black pigment content. On both surfaces of the resin layer 2 or 2a, a polylactic acid resin is a main component, a white pigment is contained, and the content of the white pigment is 1.0% by weight to 30.0% by weight with respect to the polylactic acid resin. White polylactic acid resin layer 3 made of a resin composition comprising 3 can be the to illustrate the coextruded multilayer laminate film A ₁ consisting of the construction stacked.

Next, another specific example of the multilayer laminated film according to the present invention will be exemplified. As shown in FIG. 3, a light-shielding polylactic acid resin comprising a polylactic acid resin as a main component and a resin composition containing a black pigment as shown in FIG. Layer 2 or a polylactic acid resin as a main component, further containing a black pigment and a white pigment, and the content of the black pigment is 0.1 wt% to 5. The light-shielding polylactic acid resin layer 2a is made of a resin composition having a white pigment content of 1 to 30 times the black pigment content. On both surfaces of the lactic acid resin layer 2 or 2a, a polylactic acid resin is a main component, a white pigment is contained, and the content of the white pigment is 1.0% by weight to 30.0% by weight with respect to the polylactic acid resin. % White polylactic acid resin layer made of resin composition 3 is laminated, and transparent or translucent polylactic acid resin layers 4 and 4 are laminated on both surfaces of the white polylactic acid resin layers 3 and 3 with a resin composition containing polylactic acid resin as a main component. An example of the coextruded multilayer laminated film A ₂ having the structure as described above can be given.

Further, another specific example of the multilayer laminated film according to the present invention is illustrated as shown in FIG. 4. As shown in FIG. 4, the light-shielding polylactic acid by a resin composition containing a polylactic acid resin as a main component and further containing a black pigment. Resin layer 2 or a polylactic acid resin as a main component, further containing a black pigment and a white pigment, and the content of the black pigment is 0.1% by weight to 5% with respect to the polylactic acid resin. The light-shielding polylactic acid resin layer 2a is composed of a resin composition having a white pigment content of 1 to 30 times the black pigment content. Example of coextruded multilayer laminated film A ₃ having a structure in which transparent or translucent polylactic acid resin layers 4 and 4 are laminated on both surfaces of polylactic acid resin layer 2 or 2a by a resin composition containing polylactic acid resin as a main component. can do.

Furthermore, as another specific example of the multilayer laminated film according to the present invention, as shown in FIG. 5, a light-shielding polylactic acid resin layer comprising a polylactic acid resin as a main component and further containing a black pigment as shown in FIG. 2, or a polylactic acid resin as a main component, further containing a black pigment and a white pigment, and the content of the black pigment is 0.1% by weight to 5.0% with respect to the polylactic acid resin. The light-shielding polylactic acid resin layer 2a is made of a resin composition having a white pigment content of 1 to 30 times the black pigment content. On one surface of the resin layer 2 or 2a, a polylactic acid resin is a main component, a white pigment is further contained, and the content of the white pigment is 1.0% by weight to 30.0% with respect to the polylactic acid resin. White polylactic acid tree by resin composition consisting of% by weight The layer 3 is laminated, and the polylactic acid resin is contained as a main component on both sides of the other surface of the light-blocking polylactic acid resin layer 2 or 2a and the surface of the white polylactic acid resin layer 3. Examples thereof include a coextruded multilayer laminated film A ₄ having a structure in which transparent or translucent polylactic acid resin layers 4 and 4 made of a resin composition are laminated.

The above illustrations illustrate a few examples of the multilayer laminated film according to the present invention, and it goes without saying that the present invention is not limited thereto.
In the multilayer laminated film according to the present invention, although not shown, the white polylactic acid resin layer or the transparent or translucent polylactic acid resin layer can be laminated in any combination.
In the multilayer laminated film according to the present invention, the white polylactic acid resin layer or the transparent or translucent polylactic acid resin layer can be laminated not only in one layer but also in multiple layers.
Furthermore, in the present invention, although not shown in the drawings, it is possible to design and manufacture coextruded multilayer laminated films having various forms by arbitrarily laminating other base materials depending on the purpose of use, application, etc. It is.

  By the way, the multilayer laminated film according to the present invention basically functions as a light-shielding material as well as a heat-sealable resin layer, is excellent in light-shielding properties, is aluminum-free, and has a laminating property. -Excellent in strength, heat seal strength, etc., and further has strength, etc. and excellent fastness such as weather resistance, heat resistance, water resistance, etc. Excellent shielding properties, for example, blocking the transmission of sunlight or fluorescence by the sun or fluorescent lamps, etc., and extremely useful as a packaging material for filling and packaging photosensitive materials as industrial members that require complete light shielding Heat sealant that acts as a light-blocking or light-blocking layer that prevents the contents from being decomposed or altered, or causing light deterioration such as discoloration, etc. Made as a layer In addition, it has suitability for filling and packaging of contents, storage suitability, etc., and it is biodegradable in the natural environment because it uses polylactic acid resin as the main material. In addition to being excellent in waste disposal suitability, environmental suitability, etc., it does not react to a metal (foreign matter) detector or the like.

The multilayer laminated film according to the present invention will be described in more detail. In the multilayer laminated film according to the present invention, the light-shielding polylactic acid resin layer is basically synergistic with the white polylactic acid resin layer. It acts as a light-shielding or light-shielding layer that absorbs sunlight or fluorescent light from the sun or fluorescent lamp, etc., and blocks its transmission.
Next, in the multilayer laminated film according to the present invention, the white polylactic acid resin layer is basically composed of a protective layer or a concealing layer mainly protecting or concealing the light-shielding polylactic acid resin layer, and the sun or It acts as a light-shielding or light-shielding layer that reflects or diffuses sunlight or fluorescent light from fluorescent lamps, etc. and blocks its transmission, and further, for example, on a white polylactic acid resin layer When a printed pattern such as characters, symbols, patterns, figures, etc. is directly or indirectly formed, the white polylactic acid resin layer has the desired letters, symbols, patterns, figures, etc. constituting the printed pattern. The white polylactic acid resin layer constitutes a laminated material as a packaging material to be described later, and a bag is made using this, for example, Shi Heat to form a part such as a - city - is intended to act as Le resin layer or the like.

Furthermore, in the multilayer laminated film according to the present invention, the transparent or translucent polylactic acid resin layer is basically a protective layer mainly protecting the light-shielding polylactic acid resin layer or the white polylactic acid resin layer. In addition, in some cases, it acts as a concealing layer for concealing these, and further, on the transparent or translucent polylactic acid resin layer, for example, desired characters, symbols, designs, figures, etc. When the printed pattern is directly or indirectly formed, the transparent or translucent polylactic acid resin layer makes the printed pattern such as desired characters, symbols, patterns, figures, etc. constituting the printed pattern clear. The transparent or translucent polylactic acid resin layer acts as a base layer, and constitutes a laminated material as a packaging material to be described later. Form - is intended to act as Le resin layer or the like - tosylate.
In addition, the multilayer laminated film according to the present invention uses a polylactic acid resin, and the multilayer laminated film is composed of the polylactic acid resin as a main material. Therefore, the multilayer laminated film itself has biodegradability and is decomposed in a natural environment. It has advantages.
Furthermore, since the multilayer laminated film according to the present invention is aluminum-free, it is extremely excellent in waste disposal suitability, environmental suitability, etc. without generating harmful substances when incineration disposal after use. In addition, it has the advantage of facilitating the inspection of metal pieces (foreign matter) using a metal detector or the like.

Next, in the present invention, a laminated material manufactured using the multilayer laminated film according to the present invention as described above will be described. As the laminated material, as shown in FIG. 6, the book shown in FIG. In the case of using the multilayer laminated film A _{1 according} to the invention, first, for example, printing made of desired characters, symbols, patterns, figures, etc. on the back surface of the desired substrate film 11 made of corona treatment or the like. After the pattern layer 12 is formed, the multilayer film A _{1 according} to the present invention shown in FIG. 2 is opposed to the surface of the substrate film 11 including the printed pattern layer 12 on one surface constituting the multilayer film A _1. The laminated material B according to the present invention manufactured using the multilayer laminated film according to the present invention can be manufactured by overlapping and laminating.
In FIG. 6 above, codes, 2, 2a, 3, meaning such as A ₁ represents reference numerals in FIG. 2 described above, 2, 2a, the same meaning as 3, A, and the like.
The above illustration is an example of the laminated material according to the present invention as a packaging material manufactured using the multilayer laminated film according to the present invention, and the present invention is not limited thereto. There is nothing.

For example, although not shown, the laminated material according to the present invention has, for example, a base material such as a barrier base material or the like between each layer depending on, for example, the contents to be filled and packed, the packaging purpose, the packaging form, and the like. The laminated material according to the present invention having various forms can be produced by arbitrarily laminating.
Although not shown, instead of forming the printed pattern layer on the back surface of the base film as described above, the white polylactic acid resin layer constituting the multilayer laminated film according to the present invention, or transparent or translucent After forming a printed pattern layer composed of desired characters, symbols, patterns, figures, etc. on the surface of the polylactic acid resin layer, etc., a base film is laminated and laminated on the surface including the printed pattern layer. The laminated material according to the present invention using the multilayer laminated film according to the present invention can also be produced.
Of course, in the present invention, the multilayer laminated film according to the present invention shown in FIGS. 3 to 5 is used, and the laminated material according to the present invention can be produced in the same manner as described above.

  In addition, in the above, as a laminating method for laminating at least the base film and the multilayer laminated film according to the present invention, for example, a laminating adhesive layer with a laminating adhesive or the like is provided, and then A dry laminating lamination method in which at least the base film and the multilayer laminated film according to the present invention are laminated via the laminating adhesive layer, or an adhesion assistant layer by an anchor coating agent or the like. A melt-extruded resin layer, etc., and then at least a base film and a multilayer laminated film according to the present invention through an adhesion assistant layer, a melt-extruded resin layer, etc. by the anchor coat agent. It can carry out by the melt extrusion lamination system etc. which laminate.

Next, in the present invention, an example of the packaging bag according to the present invention, which is produced by using the laminated material according to the present invention as described above, and manufacturing the bag, will be described. As the packaging bag, for example, the case of a packaging bag made using the laminated material B according to the present invention shown in FIG. 6 will be described. As shown in FIG. Two sheets of the laminated material B according to the present invention are used, and the multilayer laminated films A ₁ and A ₁ according to the present invention constituting the two laminated materials B and B are overlapped to face each other, -The multilayer laminated films A ₁ , A _{1 according} to the present invention as the toseal resin layer are opposed to each other, the end portions around the outer periphery thereof are heat sealed, and the side seal portions 21, 21, a bottom seal portion 22, etc., and an opening 23 is formed on the upper side. A three-sided seal type packaging bag C according to the present invention, which is made using the laminated material B according to the present invention, can be manufactured.

Thus, in the present invention, as shown in FIG. 8, the three-sided seal type packaging bag C according to the present invention manufactured as described above is used, and from the opening 23, for example, food, snacks, etc. Food, food and drink such as oils and fats, frozen foods, etc., and other contents 24 are filled, and then the opening 23 is heat sealed to form the upper heat seal 25. And the packaging product D based on this invention manufactured using the packaging bag C based on this invention can be manufactured.
The above illustration is an example of the packaging bag according to the present invention and the packaged product using the same, and the present invention is not limited thereto, for example, as a form of the packaging bag. Although not shown, for example, it can take the form of a packaging bag suitable for the contents such as a pillow packaging form, a gusset packaging form, a standing (self-supporting) pouch packaging form, and the like.
Further, in the present invention, the laminated material according to the present invention manufactured using the multilayer laminated film according to the present invention shown in FIGS. The packaging bag according to the present invention can be manufactured.

Next, in the present invention, the multilayer laminated film, the laminated material, the packaging bag, the material constituting the packaged product, the manufacturing method, etc. according to the present invention as described above will be described. First, in the present invention, the present invention As the polylactic acid resin constituting the multilayer laminated film according to the present invention, for example, it is a polymer mainly composed of L-, D-, or DL-lactic acid units, and has transparency and is similar to a soft polyolefin resin. Biodegradable polyester having physical properties can be used.
Thus, as the above-mentioned polylactic acid resin, specifically, for example, the melt flow rate (MFR) is about 1.0 to 20.0 g / 10 minutes, preferably 1.5 to 12.0 g / Within a range of about 10 minutes (190 ° C., 2.16 kg), a density of about 1.10 to 1.30 g / cm ³ , a melting point of about 150 to 170 ° C., and in an amorphous type Can use polylactic acid resin in the range of Tg = 50-70 degreeC.
In the present invention, the polylactic acid resin is basically relatively soft, melts by heat, has heat sealability, and further has melt tension and stretchability. It is preferable to use a polylactic acid resin as a biodegradable resin that is excellent in the above and has the coextrusion molding suitability described later.
In the present invention, melt flow rate (MFR) is measured from a method based on JIS K6921 (190 ° C.), and the density is measured from a method based on JIS K7112.
The same applies hereinafter.

Thus, in the present invention, as the above-mentioned polylactic acid resin, since the polylactic acid resin is a hard resin having a relatively high melting point, it is given flexibility and improved film forming suitability and the like. To improve the impact resistance and the like, for example, by adding one or more softening modifiers or the like that can improve heat sealability during bag making, etc. It is also possible to use a mixed resin obtained by kneading a material.
Specifically, as the polylactic acid resin, a polylactic acid resin obtained by kneading a polylactic acid resin and a softening modifier at a blending ratio of 51 to 99 parts by weight of the former and 1 to 49 parts by weight of the latter; A mixed resin with a softening modifier can be used.
Specifically as said softening modifier, 1 type or 2 types, such as other aliphatic polyester resins other than a polylactic acid resin, the plasticizer for polylactic acid resins, or a polyester-type elastomer, for example. The above can be used.

Thus, in the above, as the aliphatic polyester resin other than the polylactic acid resin, for example, a polymer mainly composed of an aliphatic dicarboxylic acid unit and an aliphatic diol unit can be used. Specifically, for example, polybutylene succinate, polybutylene adipate, polybutylene sebacate, polybutylene succinate adipate, and the like can be used.
Thus, in the present invention, the aliphatic polyester resin as described above is mainly added as a softening modifier for the polylactic acid resin, and among such aliphatic polyester resins, In particular, it is preferable to use polybutylene succinate.
In addition, as said polybutyl succinate, for example, melt flow rate (MFR) is about 1.0 to 30.0 g / 10 min, preferably 3.0 to 20.0 g / 10 min ( 190 ° C, 2.16 kg), polybutylene succinate having a density of about 1.20 to 1.30 g / cm ³ and a melting point of about 80 to 120 ° C. can do.
Thus, as the above polybutylene succinate, specifically, 1.4-butanediol and succinic acid are used as the main components, and they are aliphatic products obtained by direct dehydration polycondensation. A biodegradable polyester made of a polyester resin and having a physical property similar to that of a polyolefin resin can be used.
In the present invention, part or all of the aliphatic dicarboxylic acid units can be modified with aromatic dicarboxylic acid units.

In the present invention, the above polylactic acid resin can be used alone, but for example, other biodegradable resins such as polybutylene succinate are added in an amount of about 1 to 49% by weight. It is preferable to use it.
Thus, in the present invention, by adding other biodegradable resin such as polybutylene succinate as described above, the properties of the polylactic acid resin such as transparency and heat sealability are obtained. The effect of improving the workability, workability, etc. by improving the physical properties of the polylactic acid resin, making it suitable for film formation, improving impact resistance, etc. It is what has.
In the present invention, when other softening modifier such as polybutylene succinate is added in an amount of less than 1% by weight, the effect is not recognized. It is not preferable because of poor aptitude.
In the present invention, the above-described biodegradable resin layer constitutes a laminate as a packaging material to be described later, and, for example, a biodegradable resin layer constituting the biodegradable resin layer is formed when a bag is made using the laminate. The decomposable resin acts as a heat-sealable material that is melted by the action of heat and fused together to form a seal part.

Next, in the above, as the plasticizer for polylactic acid resin, for example, adipic acid ester or the like can be used.
Thus, as the adipic acid ester, for example, a plasticizer composed of a diesterified product of adipic acid and a higher alcohol can be used.
Specifically, a plasticizer for a polylactic acid resin (trade name, DAIFACTY-101) made of adipic acid ester manufactured by Daihachi Chemical Industry Co., Ltd. can be used.

Furthermore, in the above, as the polyester elastomer, for example, a polyester portion having a high melting point (T _m ) as a hard segment and a polyester having a low melting point (T _m ) to a low glass transition temperature (T _g ) or A polyester elastomer having a polyester portion as a soft segment can be used.
Specifically, a product name made by Toray DuPont Co., Ltd., a polyester elastomer such as High Retort 4057, or the like can be used.

Next, in the present invention, as the black pigment constituting the multilayer laminated film or the like according to the present invention, for example, sunlight or fluorescent light such as the sun or a fluorescent lamp is absorbed (mainly from the near ultraviolet to the visible region). ) To prevent or block the permeation and prevent the degradation or alteration of the contents filled and packed in the packaging bag, or the light deterioration such as fading, etc. Specifically, for example, black It is desirable to use one or a mixture of two or more colorants such as various inorganic or organic dyes and pigments.
In the present invention, examples of colorants such as various black inorganic and organic dyes and pigments include iron black, graphite or carbon black, and electrically conductive materials (polyaniline, polypyrrole). -1) or 2 or more types of black pigments such as other can be used.
Therefore, in the present invention, the carbon black as the black pigment is a carbon black as a special pigment of benzpyrene free which avoids the incorporation of benzpyrene, which has recently been pointed out to be carcinogenic. Is preferably used.
In the present invention, the black pigment is used in an amount of about 0.1 wt% to 5.0 wt%, preferably 0.5 wt% to 3.0 wt%, relative to the polylactic acid resin forming the resin composition. It is desirable to add about%.

Next, in the present invention, the white pigment constituting the multilayer laminated film according to the present invention, for example, reflects or diffuses sunlight or fluorescent light such as the sun or a fluorescent lamp, and blocks or blocks its transmission. In addition, it is intended to prevent the degradation or alteration of the contents filled and packaged in the packaging bag, or the light deterioration such as discoloration, etc. Specifically, for example, various inorganic or organic white type It is desirable to use a mixture of one or more colorants such as dyes and pigments.
In the present invention, the above-mentioned various colorants such as white inorganic and organic dyes and pigments include, for example, basic lead carbonate, basic lead sulfate, basic lead silicate, zinc white, sulfide. One or more of white pigments such as zinc, lithopone, antimony trioxide, anatase-type titanium oxide, rutile-type titanium oxide, calcium carbonate, zinc oxide, barium sulfate, etc. can be used.
Thus, the amount of the white pigment used is preferably about 1 to 30 times the content of the black pigment when the light-shielding polylactic acid resin layer is formed. Is formed in an amount of about 1.0 to 30.0% by weight, preferably about 3.0 to 20.0% by weight, based on the polylactic acid resin forming the resin composition. It is desirable to use it.

  Next, in the present invention, each resin composition constituting the multilayer laminated film according to the present invention will be described. First, as a resin composition for forming a light-blocking polylactic acid resin layer constituting the multilayer laminated film according to the present invention. For example, one or more of the above-mentioned polylactic acid resins are used as the main component of the vehicle, and one or more of the above-mentioned black pigments are added to this, and the content of the above-mentioned black pigment Is added to the polylactic acid resin at a blending ratio of about 0.1 wt% to 5.0 wt%, preferably 0.5 wt% to 5.0 wt%, and if necessary, Upon film formation, for example, film processability, heat resistance, weather resistance, mechanical properties, dimensional stability, antioxidant properties, slipperiness, mold release properties, flame retardancy, antifungal properties, electrical properties, strength Various plastics for the purpose of improving and improving others A light-blocking polylactic acid resin according to the present invention, optionally adding one or two or more kinds of additives, additives, etc., and if necessary, adding a solvent, a diluent, etc. A resin composition for forming a layer can be prepared.

  In the present invention, as the resin composition for forming the light-shielding polylactic acid resin layer constituting the multilayer laminated film according to the present invention, for example, one or more of the above-mentioned polylactic acid resins are used as the main component of the vehicle. And, to this, one or more of the above black pigments and one or more of the above white pigments are added, and the content of the above black pigment is relative to the polylactic acid resin, The content of the white pigment is 0.1 to 5.0% by weight, and the content of the white pigment is about 1 to 30 times, preferably 3 to 15 times the content of the black pigment. In addition, for example, when forming the film, if necessary, for example, film processability, heat resistance, weather resistance, mechanical properties, dimensional stability, antioxidant properties, slipping properties, release properties, etc. Improved shape, flame retardancy, anti-mold, electrical properties, strength, etc. For the purpose of modification, one or more kinds of various plastic compounding agents and additives are arbitrarily added, and if necessary, a solvent, a diluent and the like are added and kneaded sufficiently. The resin composition which forms the light-shielding polylactic acid resin layer according to the present invention can be prepared.

  Next, in the present invention, as the resin composition for forming the white polylactic acid resin layer constituting the multilayer laminated film according to the present invention, for example, one or more of the above-mentioned polylactic acid resins are used as the main vehicle. As an ingredient, one or more of the above white pigments are added, and the above white pigment content is added at a blending ratio of 1.0 wt% to 30.0 wt%. Furthermore, if necessary, when forming the film, for example, film processability, heat resistance, weather resistance, mechanical properties, dimensional stability, antioxidant properties, slip properties, mold release properties, flame retardancy, For the purpose of improving and modifying moldability, electrical characteristics, strength, etc., one or more kinds of various plastic compounding agents and additives are arbitrarily added, and if necessary, a solvent, Add a diluent etc., knead well, white poly milk according to the present invention It can be prepared a resin composition for forming the resin layer.

Next, in the present invention, as the resin composition forming the transparent or translucent polylactic acid resin layer constituting the multilayer laminated film according to the present invention, for example, one or more of the above polylactic acid resins are used. As the main component of the vehicle, and further, if necessary, when forming the film, for example, film processability, heat resistance, weather resistance, mechanical properties, dimensional stability, antioxidant properties, slipperiness, release properties, etc. For the purpose of improving and modifying the formability, flame retardancy, antifungal properties, electrical properties, strength, etc., one or more kinds of various plastic compounding agents and additives are arbitrarily added, Further, if necessary, a resin composition for forming a transparent or translucent polylactic acid resin layer according to the present invention can be prepared by adding a solvent, a diluent and the like and kneading sufficiently.
In the present invention, the resin composition forming the transparent or translucent polylactic acid resin layer according to the present invention includes, for example, the above-described light-shielding polylactic acid resin layer, white polylactic acid resin layer, and the like. In order to conceal, for example, a resin composition containing at least a polylactic acid resin as a main component of a vehicle can be prepared by adding one or more colorants such as chromatic dyes and pigments.
In the above, as colorants such as chromatic dyes / pigments, for example, azo dyes / pigments, anthraquinone dyes / pigments, phthalocyanine dyes / pigments, quinacridone dyes / pigments, dioxazine dyes / pigments, etc. Inorganic pigments such as organic dyes / pigments, yellow lead, chrome vermilion, bitumen, petal, etc. can be used.
Of course, in the present invention, the above-mentioned white pigment can also be used.

  In the present invention, in each resin composition constituting the multilayer laminated film according to the present invention, examples of the plastic compounding agent and additive include a lubricant, a crosslinking agent, an antioxidant, and an ultraviolet absorber. , Light stabilizers, fillers, reinforcing agents, antistatic agents, flame retardants, flame retardants, foaming agents, antifungal agents, pigments, dyes, dispersants, surfactants, antiblocking agents, etc. Further, a modifying resin or the like can be used, and the addition amount can be arbitrarily added from a very small amount to several tens of weight% depending on the purpose.

Furthermore, in the above, as the compounding agent or additive, specifically, a lubricant having its own lubricity and little migration in the resin can be used. For example, liquid paraffin, white Vaseline, petroleum wax, microcrystalline wax, montan wax, polyethylene wax and the like, higher fatty acids having 8 to 22 carbon atoms, or higher fatty acid aluminum, higher fatty acid calcium, higher fatty acid magnesium higher fatty acid zinc, higher fatty acid lithium Higher fatty acids or metal salts thereof, linear aliphatic monohydric alcohols having 8 to 18 carbon atoms, glycerin, sorbitol, propylene glycol, pentaerythritol, triethylene glycol, etc. Aliphatic alcohols, higher fatty acids having 4 to 22 carbon atoms and straight chain aliphatics having 8 to 18 carbon atoms Esters with polyhydric alcohols, butyl acetyl citrate, di-2-ethyl-hexyl adipate, azelaic acid-n-hexyl, ethanediol montanate, poly (1.3-butanediol adipate) ester, acetylricino Methyl ester, poly (1.3-butylene glycol, 1.4-butylene glycol, octyl alcohol adipic acid) ester, ester of sugar sugar sugar and fatty acid, hydrogenated Edible fats and oils, castor oil, spam acetyl wax, glycerides of acetylated monoglyceride sugar, ethylene bis-fatty acid amide represented by, for example, ethylene bisoleyl amide having 16 to 18 carbon atoms, higher fatty acid amide having 8 to 22 carbon atoms , Stearyl erucamide, erucic acid amide, oleyl palmitoamide, etc. 1 to 2 types of fatty acid amides, and others such as methylhydrodiene polysiloxane, dimethyl polysiloxane, methylphenyl polysiloxane, silicone oil jarodine such as polyoxyalkylene dimethylpolysiloxane, and glycerin ester of maleic acid modified rosin The above can be used.
In the present invention, among the lubricants as described above, erucic acid amide, ethylene bis oleyl amide, stearic acid amide, oleic acid amide, methylene bis stearic acid amide, etc., are themselves slippery, It is a very effective material.
As the addition amount of the above-mentioned lubricant, it is preferable to add at a ratio of about 0.08 wt% to 10.0 wt% with respect to 100 parts by weight of the polypropylene resin.

In the present invention, other oxides such as aluminum oxide, magnesium oxide, silica, calcium oxide, titanium oxide, and zinc oxide; hydroxides such as aluminum hydroxide, magnesium hydroxide, and calcium hydroxide; Carbonates such as magnesium and calcium carbonate, sulfates such as calcium sulfate and barium sulfate, silicates such as magnesium silicate, aluminum silicate, calcium silicate and aluminosilicate, and others such as kaolin, talc and diatomaceous earth Anti-blocking agent based on inorganic compounds, or high density polyethylene, ultra-high molecular weight polyethylene having a molecular weight of 300000 or more, polypropylene, polycarbonate, polyamide, polyester, melamine resin, diallyl phthalate resin, acrylic resin, etc. Organic consisting of fine powder It one free of compounds based antiblocking agents can be added two or more.
The addition amount is preferably about 0.01 to 3% by weight with respect to 100 parts by weight of the polypropylene resin.

  Next, in the present invention, a method for producing a multilayer laminated film according to the present invention using each resin composition as described above will be described. First, in the present invention, each resin composition is as described above. And then using two or more of the resin compositions and then co-extrusion of the resin compositions using, for example, a T-die co-extruder, an inflation co-extruder, etc. And the multilayer laminated film which concerns on this invention can be manufactured.

  Thus, in the present invention, a specific method for producing a multilayer laminated film according to the present invention using each of the resin compositions as described above will be described. In the present invention, first, as described above, A resin composition for forming a light-blocking polylactic acid resin layer according to the invention and a resin composition for forming a white polylactic acid resin layer according to the present invention are prepared, and then the two types of resin compositions are used. These are co-extruded using, for example, a T-die co-extruder, an inflation co-extruder, etc., and are composed of the co-extruded multilayer laminated film according to the present invention. Two types of three layers according to the present invention comprising a polylactic acid resin layer, a second layer comprising a light-shielding polylactic acid resin layer, and a third layer coextruded in order of a white polylactic acid resin layer. A multilayer laminated film made of can be produced.

  Furthermore, in the present invention, another specific method for producing the multilayer laminated film according to the present invention using each of the resin compositions as described above will be described. In the present invention, first, as described above, A resin composition for forming a light-blocking polylactic acid resin layer according to the invention and a resin composition for forming a transparent or translucent polylactic acid resin layer according to the present invention are prepared, and then the two types of resin compositions These are co-extruded using, for example, a T-die co-extruder, an inflation co-extruder, etc., and are made of the co-extruded multilayer laminated film according to the present invention. A transparent or translucent polylactic acid resin layer, the second layer is a light-blocking polylactic acid resin layer, and the third layer is a coextruded laminate of three layers in the order of a transparent or translucent polylactic acid resin layer. A multi-layer consisting of two types and three layers according to the present invention It is possible to produce a laminated film.

  Further, in the present invention, another specific method for producing the multilayer laminated film according to the present invention using each of the resin compositions as described above will be described. In the present invention, first, as described above, A resin composition for forming a light-blocking polylactic acid resin layer according to the present invention, a resin composition for forming a white polylactic acid resin layer according to the present invention, and a transparent or translucent polylactic acid resin layer according to the present invention. The resin composition to be formed is prepared, and then the three types of resin compositions are used, and these are co-extruded using, for example, a T-die co-extruder, an inflation co-extruder, or the like. The co-extruded multilayer laminated film according to the present invention, wherein the first layer is a transparent or translucent polylactic acid resin layer, the second layer is a white polylactic acid resin layer, and the third layer is a light-shielding poly The lactic acid resin layer and the fourth layer are transparent And it is possible to produce a multilayer laminated film composed of three four-layer according to the present invention having the structure obtained by sequentially with 4-layer co-extrusion lamination of the semi-transparent polylactic acid resin layer.

  Furthermore, in the present invention, another specific method for producing the multilayer laminated film according to the present invention using each resin composition as described above will be described. In the present invention, first, as described above, A resin composition for forming a light-blocking polylactic acid resin layer according to the present invention, a resin composition for forming a white polylactic acid resin layer according to the present invention, and a transparent or translucent polylactic acid resin layer according to the present invention. The resin composition to be formed is prepared, and then the three types of resin compositions are used, and these are co-extruded using, for example, a T-die co-extruder, an inflation co-extruder, or the like. The co-extruded multilayer laminated film according to the present invention, wherein the first layer is a transparent or translucent polylactic acid resin layer, the second layer is a white polylactic acid resin layer, and the third layer is a light-shielding poly Lactic acid resin layer, 4th layer is white polylactic acid A multi-layer laminated film comprising three types and five layers according to the present invention can be produced, wherein the fat layer and the fifth layer are constituted by coextrusion lamination of five layers in the order of a transparent or translucent polylactic acid resin layer. .

The above examples illustrate a few examples of the method for producing a multilayer laminated film according to the present invention, and the present invention is not limited thereto.
In general, when the multilayer laminated film according to the present invention is formed by extrusion using each of the resin compositions as described above, for film formation, for example, at the time of product replacement (purge) Because it is burdened with work such as disassembly and cleaning of an extruder, etc., it is desired to avoid the use of colorants such as pigments in the resin composition, and it is desired to form a film without colorant addition It is. Therefore, in the present invention, as an outer layer, in order to form a laminated film in which contamination due to the colorant such as the pigment does not occur in a die that is difficult to disassemble, although the contamination due to the colorant such as the pigment of the extruder cannot be avoided, is formed. , Using a resin composition mainly composed of a transparent or translucent polylactic acid resin to which no colorant such as a pigment is added, thereby making the resin film without the addition of a colorant such as a pigment 5 μm to 100 μm. It has the advantage of protecting the dirt on the die.
In the present invention, when the multilayer laminated film according to the present invention is produced, the light-blocking polylactic acid resin layer, the white polylactic acid resin layer, the transparent or translucent polylactic acid resin layer, etc. should be only one layer. It can be coextruded and laminated into two or more layers.
Furthermore, in the present invention, as the multilayer laminated film according to the present invention, other materials are used depending on the purpose of use, applications, etc., and these are arbitrarily coextruded and laminated to form a coextruded multilayer having various forms. A laminated resin film can be designed and manufactured.

Thus, in the present invention, the light-blocking or light-blocking layer composed of the light-blocking polylactic acid resin layer and the white polylactic acid resin layer as described above absorbs sunlight or the like in one layer. At the same time, the other layer reflects or diffuses sunlight, etc., and the synergistic effect of the two layers completely blocks or blocks the transmission of sunlight or fluorescence from the sun or fluorescent lamp, etc. The function and effect of further preventing the degradation or alteration of the contents packed and packaged in the bag, or the light deterioration such as discoloration, etc. will be increased.
Further, in the present invention, the white polylactic acid resin layer has an effect of a protective layer for protecting the light-shielding polylactic acid resin layer or the like, or a concealing layer for concealing.
Furthermore, in the present invention, one of the above-mentioned white polylactic acid resin layers has a function of an underlayer of a printed pattern layer provided directly or indirectly on the layer, and constitutes a printed pattern layer. The printed image such as letters, figures, symbols, designs, etc. is further clarified, and an effect that a beautiful printed pattern can be reproduced or manifested, and the other side of the white polylactic acid resin layer, The effect of having the function as a heat-sealable resin layer for forming a seal part or the like at the time of bag making or the like can be achieved.
In the present invention, the transparent or translucent polylactic acid resin layer is a protective layer for protecting the light-shielding polylactic acid resin layer or the white polylactic acid resin layer, or a concealing layer for concealing. One of the transparent or translucent polylactic acid resin layers that act and have a function of the base layer of the printed pattern layer provided directly or indirectly on the layer, the characters constituting the printed pattern layer In addition, the printed image such as a figure, a symbol, a pattern, etc. is further clarified, and an effect that a beautiful printed pattern can be reproduced or manifested, and the other transparent or translucent polylactic acid resin layer is It is possible to achieve an effect of having a function as a heat-sealable resin layer for forming a seal part or the like during bag making.

Next, in the present invention, the film thickness of the multilayer laminated film according to the present invention is about 15 μm to 180 μm, preferably about 30 μm to 150 μm.
Thus, in the multilayer laminated film according to the present invention, as the film thickness of each layer constituting the multilayer laminated film, first, as the light-shielding polylactic acid resin layer, the film thickness is 3 μm to 30 μm, preferably 5 μm to 20 μm. The white polylactic acid resin layer has a thickness of 5 μm to 30 μm, preferably about 10 μm to 20 μm, and the transparent or translucent polylactic acid resin layer has a thickness of 5 μm to 100 μm, preferably about 10 μm to 80 μm. It is preferable that it consists of these ranges.
In the above, as the film thickness of each layer constituting the coextruded multilayer laminated resin film according to the present invention, first, the film thickness of the light-shielding polylactic acid resin layer is less than 3 μm. This is not preferable because it may cause a problem that it is greatly affected by thickness unevenness, and if the film thickness exceeds 30 μm, the light shielding property or light shielding property is not good. Although it is high, it is not preferable because it is difficult to set, select, etc., a white polylactic acid resin layer that conceals it.
Next, when the film thickness of the white polylactic acid resin layer is less than 5 μm, it is difficult to conceal the light-shielding polylactic acid resin layer, and the appearance and the aesthetics are lowered. When a printed pattern layer is provided on the polylactic acid resin layer, the gradation or color tone of the printed pattern layer is affected, and the function as a heat-seal resin layer is also reduced. It is not preferable for reasons such as, and if the film thickness exceeds 30 μm, the concealing property of the light-shielding polylactic acid resin layer is increased, but the overall thickness is increased, and there is an effect on the environment as packaging waste etc. This is not preferable because of the possibility of an increase.
Furthermore, when the film thickness of the transparent or translucent polylactic acid resin layer is less than 5 μm, it becomes difficult to perform functions such as protection and concealment, and appearance and aesthetics are deteriorated. Further, it is not preferable because the function as a heat-sealable resin layer or the like is lowered, and when the film thickness exceeds 100 μm, the entire layer thickness increases, It is not preferable because it is not preferable for handling.

In addition, in this invention, in order to improve the close adhesiveness etc. between each layer which comprises the multilayer laminated film which concerns on this invention, it can laminate | stack with an adhesive resin layer etc. interposed. That is, the above-mentioned adhesive resin layer has, for example, inferior affinity, adhesion, etc. between the respective layers, and both of them may cause delamination or the like without being tightly adhered to each other. It is located between the two layers, and has an effect as an extremely excellent adhesive layer that can be laminated with both of them firmly and tightly bonded to each other.
Thus, the above-mentioned adhesive resin layer can be composed of an adhesive resin layer made of a resin composition containing one or more adhesive polyolefin resins as a main component of the vehicle.
As the above-mentioned adhesive polyolefin-based resin, a polyolefin-based resin that can be melted by heat and extruded from a T-die, specifically, for example, low density polyethylene, medium density polyethylene, high density polyethylene, linear (wire ) Low-density polyethylene, ethylene-α / olefin copolymer polymerized using metallocene catalyst, polypropylene, ethylene-vinyl acetate copolymer, ionomer resin, ethylene-ethyl acrylate copolymer, ethylene-acrylic acid copolymer Polyolefin resins such as polymers, ethylene-methacrylic acid copolymers, ethylene-propylene copolymers, methylpentene polymers, polyethylene, polypropylene, etc., such as acrylic acid, methacrylic acid, maleic anhydride, fumaric acid, etc. Acid-modified polyolefin resin modified with unsaturated carboxylic acid Other such heat - tosylate - to one free polyolefin resin having Le property can be used two or more kinds.

As is clear from the above description, the multilayer laminated film according to the present invention is a light-shielding material as well as a heat-sealable resin layer, has excellent light-shielding properties, is aluminum-free, and In addition, it has excellent laminating strength, heat sealability strength, etc., and further has strength etc., and excellent fastness such as weather resistance, heat resistance, water resistance, etc. It also has excellent light blocking properties. For example, it prevents the transmission of sunlight or fluorescent light from the sun or fluorescent lamps, etc., preventing the contents from being decomposed or altered, or causing light deterioration such as discoloration or others. In addition, it has suitability for filling and storage of contents, storage suitability, etc., and in particular, it has extremely excellent usefulness as a packaging material for photosensitive materials as industrial members that require complete light shielding, and impairs the packaging appearance. Excellent cosmetics, and more It has the advantage that it does not generate harmful substances during incineration disposal after use, has excellent disposal suitability and environmental suitability, and is easy to detect metal pieces (foreign matter) with a metal detector, etc. It is.
Thus, the multilayer laminated film according to the present invention uses this as a light-shielding or light-shielding material or a heat-sealable resin layer, and other materials such as a plastic film and other substrates, paper bases, etc. 1 or 2 or more kinds of various base films such as a material, a barrier base material that prevents permeation of oxygen gas or water vapor, cellophane, woven or non-woven fabric, glass plate, etc. Can be applied to uses such as packaging materials constituting packaging bags and the like having various forms, and the like. .

  Next, in the present invention, the laminated material according to the present invention as a packaging material using the multilayer laminated film according to the present invention will be described in more detail. First, as a method for producing the laminated material, for example, Dry laminate lamination method for arbitrarily laminating a desired base material such as a plastic film through a primer agent layer or a laminating adhesive layer, or a primer agent layer or an anchor coating agent Manufacturing laminated materials in various forms using an extrusion laminating method in which various resins are melt-extruded through layers and the like, and a desired base material is arbitrarily laminated, and other laminating methods Can do.

Thus, in the present invention, the base film constituting the laminated material according to the present invention will be described. As such a base film, this is the basic or auxiliary material that constitutes the packaging bag according to the present invention. Therefore, it has excellent properties in mechanical, physical, chemical, etc., excellent in strength, toughness, etc., and further, heat resistance, moisture resistance, pinhole resistance, puncture resistance, A resin film or sheet excellent in transparency and the like can be used.
Specifically, for example, polyester resin, polyamide resin, polyaramid resin, polyethylene resin, polypropylene resin, polycarbonate resin, polyacetal resin, fluorine resin, biodegradable resin, Various other resin films or sheets can be used.
Thus, as the resin film or sheet, any of an unstretched film or a stretched film stretched in a uniaxial direction or a biaxial direction can be used. In the present invention, the thickness of the resin film or sheet may be a thickness that can be kept to the minimum necessary for strength, puncture resistance, rigidity, and the like. On the other hand, if it is too thin, the strength, puncture resistance, rigidity, etc. are lowered, which is not preferable.
In the present invention, for the reasons described above, about 10 μm to 100 μm, preferably about 12 μm to 50 μm is most desirable.
Thus, in the present invention, among the above-described resin films or sheets, in particular, a biaxially stretched polyester resin having a thickness of about 9 to 30 μm, a biaxially stretched polyamide resin, or a biaxial It is preferable to use a film of stretched polypropylene resin or the like.

Furthermore, in the present invention, as the base film to be laminated with the multilayer laminated film according to the present invention, in addition to the base film as described above, for example, it has moldability, bending resistance, rigidity, etc. For example, a paper substrate such as a highly sized bleached or unbleached paper substrate, or a pure white roll paper, kraft paper, paperboard, processed paper, or the like can be laminated.
In the above, as the paper substrate constituting the paper layer, it is desirable to use a material having a basis weight of about 80 to 600 g / m ² , preferably a basis weight of about 100 to 450 g / m ² .
Of course, in the present invention, the paper base material constituting the paper layer and various resin films or sheets as the base film mentioned above can be used in combination.

Next, in the present invention, as the other base film laminated with the multilayer laminated film according to the present invention, for example, the property of shielding light such as sunlight, or gas such as water vapor, water, oxygen, etc. It is possible to use a material having the property of not transmitting light, etc., and the like, and this may be a single base material or a composite base material formed by combining two or more base materials.
Specifically, for example, a resin film having a deposited film of an inorganic oxide such as silicon oxide or aluminum oxide having a barrier property, low density polyethylene having a barrier property such as water vapor or water, medium density polyethylene, high Films or sheets of resin such as density polyethylene, linear low density polyethylene, polypropylene, ethylene-propylene copolymer, polyvinyl alcohol having gas barrier properties, saponified ethylene-vinyl acetate copolymer, nylon MXD6 Films or sheets of resin, etc., and various colored resin films or sheets having light-shielding properties obtained by adding a colorant such as a pigment to the resin and adding a desired additive to knead to form a film Can be used.
These materials can be used alone or in combination. The thickness of the film or sheet is arbitrary, but is usually about 5 μm to 300 μm, more preferably about 10 μm to 100 μm.

Further, in the above, a deposited film of inorganic oxide having a thickness of about 100 to 2000 mm can be used.
Examples of the resin film that supports the vapor deposition film include polyester film, polyamide film, polyolefin film, polyvinyl chloride film, polycarbonate film, polyvinylidene chloride film, polyvinyl alcohol film, and ethylene-acetic acid. A vinyl copolymer saponified film, etc. can be used.

In the above, as the inorganic oxide constituting the vapor-deposited film layer of the inorganic oxide, for example, silicon oxide (SiO _x ), aluminum oxide, indium oxide, tin oxide, zirconium oxide or the like may be used. it can.
Furthermore, in the present invention, the inorganic oxide may be a mixture of silicon monoxide and silicon dioxide, or a mixture of silicon oxide and aluminum oxide.
Thus, in the present invention, the inorganic oxide thin film layer is formed by forming a deposited film by a vacuum deposition method such as an ion beam method or an electron beam method, a sputtering method, or the like. be able to.
In the above, the thickness of the inorganic oxide thin film layer is usually preferably about 100 to 2000 mm in order to obtain a sufficient barrier property, and particularly preferably about 200 to 1500 mm in the present invention. .
In the above, when the thickness of the inorganic oxide thin film layer exceeds 1500 mm, particularly when it exceeds 2000 mm, the inorganic oxide thin film layer is liable to crack and the like, thereby reducing the barrier property. It is not preferable because of the problem that the material cost is high and the material cost is high, and if it is less than 100 mm, particularly less than 200 mm, it is difficult to recognize the effect, which is not preferable.

Next, in the present invention, as the other base film laminated on the multilayer laminated film according to the present invention, there is little adsorption of a fragrance component and the like contained in the contents to be filled and packaged, and the aroma retaining property is further enhanced. A resin film or sheet having a property that does not cause a taste change or a strange odor can be used.
Specifically, for example, polyacrylic resin, polymethacrylic resin, polyacrylonitrile resin, polymethacrylonitrile resin, polystyrene resin, polycarbonate resin, polyethylene terephthalate resin or the like Resin obtained by copolymerizing or modifying a part of ethylene component and / or terephthalate component with other di- or higher polyhydric alcohol component or dicarboxylic acid component, or polyester such as polyethylene naphthalate resin Use films or sheets of resins such as resins, polyamide resins, saponified ethylene-vinyl acetate copolymers, polyvinyl alcohol resins, polyvinyl chloride resins, polyvinylidene chloride resins, etc. Can do.
Therefore, in the present invention, among the above-described resin films or sheets, it is desirable to use a resin film or sheet having a fragrance retaining property and a barrier property against oxygen gas or water vapor. Specifically, for example, a saponified ethylene-vinyl acetate copolymer, a polyamide-based resin, a polyacrylonitrile-based resin, a polyester-based resin, or the like is used as a resin film or a film having excellent aroma retention and barrier properties. -It is desirable to use

Furthermore, in the present invention, since the packaging container is usually subjected to severe physical and chemical conditions, the packaging material constituting the packaging container is required to have severe packaging suitability, Various conditions such as anti-deformation strength, drop impact strength, pinhole resistance, heat resistance, sealing performance, quality maintenance, workability, hygiene, and the like are required. A material that satisfies the various conditions as described above can be arbitrarily selected and used.
Specifically, for example, low density polyethylene, medium density polyethylene, high density polyethylene, linear low density polyethylene, polypropylene, ethylene-propylene copolymer, ethylene-vinyl acetate copolymer, ionomer resin, ethylene-acrylic acid Ethyl copolymer, ethylene-acrylic acid or methacrylic acid copolymer, methylpentene polymer, polybutene resin, polyvinyl chloride resin, polyvinyl acetate resin, polyvinylidene chloride resin, vinyl chloride-vinylidene chloride copolymer Polymer, poly (meth) acrylic resin, polyacrylonitrile resin, polystyrene resin, acrylonitrile-styrene copolymer (AS resin), acrylonitrile-butadiene-styrene copolymer (ABS resin), polyester resin, Polyamide resin, polycarbonate Known resins such as neat resins, polyvinyl alcohol resins, saponified ethylene-vinyl acetate copolymers, fluorine resins, diene resins, polyacetal resins, polyurethane resins, nitrocellulose, etc. Any resin film or sheet can be selected and used.
In addition, for example, a film such as cellophane, a synthetic paper, or the like can be used.
In the present invention, the above-described film or sheet may be any of unstretched, uniaxially or biaxially stretched.
The thickness is arbitrary, but can be selected from a range of several μm to 300 μm.
Furthermore, in the present invention, the film or sheet may be a film having any property such as extrusion film formation, inflation film formation, and coating film.

In the present invention, in the laminated material according to the present invention, an arbitrary printed pattern layer can be provided on the front surface, the back surface, or both surfaces of any material constituting the laminated material.
Thus, in the present invention, as the printed pattern layer, for example, a desired printed pattern made of, for example, characters, figures, symbols, patterns, etc. is printed on the substrate film, A printed pattern layer can be formed.
Thus, as the above-mentioned printed pattern layer, specifically, first, an ink vehicle composed of one or more kinds of resin or the like is a main component, and if necessary, a plasticizer and a stabilizer. , One or more additives such as antioxidants, light stabilizers, ultraviolet absorbers, curing agents, cross-linking agents, lubricants, antistatic agents, fillers, etc. are optionally added, and further dyes, A colorant such as a pigment is added, and the ink composition is prepared by sufficiently kneading with a solvent, a diluent, etc., and then the ink composition is used, for example, gravure printing, offset printing, letterpress printing, screen printing A desired printing pattern consisting of characters, figures, symbols, patterns, etc. is printed on the base film using a printing method such as printing, transfer printing, flexographic printing, etc. The printed pattern layer can be formed

  In the above, as the vehicle for ink, known ones such as sesame oil, drill oil, soybean oil, hydrocarbon oil, rosin, rosin ester, rosin modified resin, shellac, alkyd resin, phenol resin, malein Acid resins, natural resins, hydrocarbon resins, polyvinyl chloride resins, polyvinyl acetate resins, polystyrene resins, polyvinyl butyral resins, acrylic or methacrylic resins, polyamide resins, polyester resins, polyurethane resins Use one or more of epoxy resin, urea resin, melamine resin, amino alkyd resin, phenol resin, nitrocellulose, ethylcellulose, chlorinated rubber, cyclized rubber, etc. Can do.

Next, in the present invention, the laminating adhesive layer constituting the laminated material according to the present invention will be described. As the laminating adhesive layer constituting the laminating adhesive layer, for example, poly A vinyl acetate adhesive, a homopolymer such as ethyl acrylate, butyl, 2-ethylhexyl ester, or a polyacrylate adhesive composed of a copolymer of these with methyl methacrylate, acrylonitrile, styrene, etc., Cyanoacrylate adhesives, ethylene copolymer adhesives consisting of copolymers of ethylene and vinyl acetate, ethyl acrylate, acrylic acid, methacrylic acid, etc., cellulose adhesives, polyester adhesives Agent, polyamide adhesive, polyimide adhesive, amino resin adhesive made of urea resin or melamine resin, etc. Phenolic resin adhesives, epoxy adhesives, polyurethane adhesives, reactive (meth) acrylic adhesives, rubber adhesives such as chloroprene rubber, nitrile rubber, styrene-butadiene rubber, silicone-based adhesives Adhesives such as adhesives, alkali metal silicates, inorganic adhesives made of low-melting glass, and the like can be used.
The composition system of the above-mentioned adhesive may be any composition form such as an aqueous type, a solution type, an emulsion type, and a dispersion type, and the properties thereof are film / sheet type, powder type, solid type, etc. Any form may be used, and the bonding mechanism may be any form such as a chemical reaction type, a solvent volatilization type, a heat melting type, and a hot pressure type.
Thus, the above adhesive can be applied by, for example, a roll coating method, a gravure roll coating method, a kiss coating method, a coating method or the like, or a printing method. The coating amount is preferably about 0.1 to 10 g / m ² (dry state).

Next, in the present invention, the anchor coat agent layer constituting the laminated material according to the present invention will be described. As the anchor coat agent constituting such an anchor coat agent layer, for example, alkyl titane is used. Various water-based or oil-based anchor coating agents such as organic titanium-based, isocyanate-based, polyethyleneimine-based, polyptadiene-based, etc. can be used.
The above-mentioned anchor coating agent can be coated using a coating method such as a roll coat, a gravure roll coat, a kiss coat, and the like. The amount is preferably about 0.1 to 5 g / m ² (dry state).

Examples of the melt-extruded resin layer in the above extrusion lamination method include, for example, polyethylene resins, polypropylene resins, acid-modified polyethylene resins, acid-modified polypropylene resins, ethylene-acrylic acid or methacrylic acid copolymers. , Thermoplastic resins such as sarin resin, ethylene-vinyl acetate copolymer, polyvinyl acetate resin, ethylene-acrylic acid ester or methacrylic acid ester copolymer, polystyrene resin, polyvinyl chloride resin, etc. 1 type (s) or 2 or more types can be used.
In the above extrusion laminating method, in order to obtain stronger adhesive strength, for example, lamination can be performed through an anchor coating agent layer such as the above-described anchor coating agent. .

In the present invention, examples of the primer layer include a polyurethane resin, a polyester resin, a polyamide resin, an epoxy resin, a phenol resin, a (meth) acrylic resin, and a polyvinyl acetate resin. A primer layer can be formed using a resin composition having a main component of a vehicle such as a polyolefin resin such as polyethylene or polypropylene, or a copolymer or modified resin thereof, a cellulose resin, or the like. .
In the present invention, for example, a primer coating layer is formed by coating using a coating method such as roll coating, gravure rolling coating, kiss coating, etc. Therefore, the coating amount is preferably about 0.1 to 10 g / m ² (dry state).
Moreover, in this invention, when performing said lamination | stacking, if necessary, pre-treatments, such as a corona treatment and an ozone treatment, can be given to a film.

Thus, in the present invention, a method for making a packaging bag according to the present invention using the laminated material according to the present invention as described above will be described. Use the multilayer laminated film according to the present invention as the inner heat-seal resin layer so that the surfaces of the multilayer laminated film face each other and fold them, or overlap the two sheets, and further the peripheral edge Heat-sealed to provide a seal portion, and packaging bags having various forms can be made.
Thus, as a bag-making method, the above-mentioned laminated material is folded with the inner layer faces facing each other, or the two sheets are overlapped, and the peripheral edge of the outer periphery is, for example, a side sheet. Seal type, two-sided seal type, three-sided seal type, four-sided seal type, envelope-sealed seal type, jointed seal type (pillar seal type), pleated seal type It is possible to manufacture various types of packaging bags according to the present invention by heat sealing in the form of a heat seal such as a flat bottom seal type, a square bottom seal type, or the like.
In addition, for example, a self-supporting packaging bag (standing pouch) or the like can be manufactured, and in the present invention, a tube container or the like can also be manufactured using the above-described laminated material.
In the above, as the heat seal method, for example, a bar seal, a rotary roll seal, a belt seal, an impulse seal, a high frequency seal, an ultrasonic seal and the like are known. It can be done by the method.
In the present invention, a spout such as a one-piece type, a two-piece type, or the like, or a zipper for opening and closing can be arbitrarily attached to the packaging bag as described above.

  Next, in the case of a liquid-filled paper container including a paper base material as a packaging container, first, a laminated material obtained by laminating a paper base material is produced as a laminated material, and a blank for producing a desired paper container therefrom. Manufacturing a plate, and then boxing the body, bottom, head, etc. using the blank plate, for example, manufacturing a brick-type, flat-type or gable-top type liquid paper container, etc. Can do.

In the present invention, the packaging bag produced as described above includes, for example, food and drink, fruit juice, juice, drinking water, liquor, cooked food, marine products, frozen food, meat products, boiled foods, rice cakes, liquids -Contents consisting of various foods and beverages such as coffee, seasonings and other chemicals, chemicals such as adhesives, adhesives, liquid detergents, etc., cosmetics, pharmaceuticals, miscellaneous goods such as chemical warmers, photosensitive materials, and other articles. Can be filled and packaged.
Thus, in the present invention, in particular, for example, self-supporting bags for filling and packaging soy sauce, sauce, soup, etc., self-supporting bags for filling and packaging fresh confectionery, etc., and packaging clothes for filling and packaging frozen foods Alternatively, it is useful as a self-supporting bag for filling and packaging liquid food and drink such as a self-supporting bag filled and packaged with boiled or retort food, etc.
In the present invention, for example, from the opening of the self-supporting bag manufactured as described above, for example, food and drink and other contents are filled, and then the upper opening is heat sealed and the upper sheet is placed. -Forming a lug part etc., and also performing a boil process, a retort process etc. as needed, and can manufacture the packaged product which consists of various forms.
Further, in the present invention, it is particularly useful as a self-supporting bag for filling and packaging articles such as photosensitive materials as industrial materials, for example, films, photosensitive agents, and the like.

Thus, in the present invention, in the packaged product manufactured as described above, the multilayer laminated film according to the present invention is particularly excellent in light-shielding property or light-shielding property, for example, sunlight or fluorescence by the sun or a fluorescent lamp, etc. For example, food and drink containing fats and oils as the contents, for example, can prevent the contents from being decomposed or altered or prevented from causing light deterioration such as discoloration or the like. In the case of a product or the like, it has an advantage that oxidation of oil and fat components and the like due to transmission of sunlight or fluorescence can be prevented.
In particular, frozen foods and drinks are usually handled by supermarkets and other mass retailers. In this case, they are sold on display shelves that receive a lot of fluorescence from fluorescent lamps. It's real.
Thus, in frozen foods and beverages sold under the above environment, the fat and oil components are greatly affected by light having a wavelength of 500 nm or less, and have a maximum absorption of visible light in the yellow band around 550 nm. Therefore, the oxidation reaction is accelerated by the influence of fluorescent light or the like by a fluorescent lamp or the like, and the contents may be decomposed or altered.

However, as described above, the multilayer laminated film according to the present invention is particularly excellent in light-shielding property or light-shielding property, for example, blocking the transmission of sunlight or fluorescence by the sun or a fluorescent lamp, and the contents are decomposed. From the laminated material according to the present invention, which is manufactured using the multilayer laminated film according to the present invention, it is possible to prevent the deterioration or the deterioration of the light or the like from causing light deterioration such as others. In the frozen food and drink using the packaging bag according to the present invention, it is handled at a mass retailer such as a supermarket and sold on a display shelf that receives a lot of fluorescent light etc. Even if it is affected by fluorescence or the like, the oxidation reaction can be prevented from being promoted and the contents can be prevented from being decomposed or altered.
In the present invention, since the packaged product manufactured above does not use an aluminum foil or an aluminum deposited film, a metal (foreign matter) detector is used, and a metal (foreign matter) is detected by a metal (foreign matter) detector. It has the advantage that detection is also possible.

Further, in the present invention, the packaged product manufactured as described above is such that the multilayer laminated film according to the present invention is particularly excellent in light-shielding property or light-shielding property, for example, transmission of sunlight or fluorescence by the sun or a fluorescent lamp. For example, as a content, a photosensitive material as an industrial material can be prevented. It is useful as a packaging material for filling and packaging.
In addition, the multilayer laminated film according to the present invention uses a polylactic acid resin, and the multilayer laminated film is composed of the polylactic acid resin as a main material. Therefore, the multilayer laminated film itself has biodegradability and is decomposed in a natural environment. It has advantages.
Next, the present invention will be described more specifically with reference to examples.

(1). First, the following resin compositions (a), (b), (c) and (d) were prepared. (I). Resin composition constituting the first layer Polylactic acid resin (PLA) (Mitsui Chemicals, trade name, LACEA H-400: density = 1.26 g / cm ³ , melt flow rate (MFR) = 2.7 g / A resin composition was prepared by sufficiently kneading 100.0 parts by weight (melting point: 166 ° C. for 10 minutes), 0.5 parts by weight of synthetic silica, and 0.05 parts by weight of erucamide.
(B). Resin composition constituting the second layer Polylactic acid resin (PLA) (Mitsui Chemicals, trade name, LACEA H-400: density = 1.26 g / cm ³ , melt flow rate (MFR) = 2.7 g / A resin composition was prepared by sufficiently kneading 80.0 parts by weight (melting point: 166 ° C. for 10 minutes) and 20.0 parts by weight of titanium oxide as a white pigment.
(C). Resin composition constituting third layer Polylactic acid resin (PLA) (Mitsui Chemicals, trade name, LACEA H-400: density = 1.26 g / cm ³ , melt flow rate (MFR) = 2.7 g / 10 minutes, melting point: 166 ° C.) 73.5 parts by weight, carbon black as a black pigment, 1.5 parts by weight, and 25.0 parts by weight of titanium oxide as a white pigment were sufficiently kneaded to obtain a resin composition. Was prepared.
(D). Resin composition constituting the fourth layer The resin composition prepared in (a) above was used in the same manner.
(2). Next, using each of the resin compositions prepared above, using a three-kind four-layer top-blown air-cooled inflation coextrusion film forming machine, the layer of the resin composition of (A) is 5 μm, (B) The layer made of the resin composition is 20 μm, (c) the layer made of the resin composition is 8 μm, and the layer made of the resin composition (d) is co-extruded to 17 μm. A multilayer laminated film according to the present invention consisting of a 50 μm coextruded inflation film was produced.
When the multilayer laminated film produced above was visually recognized from the first layer side, it was milky white and excellent in aesthetics.
Furthermore, in the multilayer laminated film produced above, the light-shielding properties were sufficient, and each wavelength resulting from the oxidation of fats and oils was hardly transmitted, which was very good.

(1). First, the following resin compositions (a), (b), (c) and (d) were prepared. (I). Resin composition constituting the first layer Polylactic acid resin (PLA) (Mitsui Chemicals, trade name, LACEA H-400: density = 1.26 g / cm ³ , melt flow rate (MFR) = 2.7 g / 10 minutes, melting point 166 ° C.) 70.0 parts by weight, polybutylene terephthalate (manufactured by Mitsubishi Chemical Corporation, trade name, GS P1a AZ91T: density = 1.26 g / cm ³ , melt flow rate (MFR) = A resin composition was prepared by sufficiently kneading 30.0 parts by weight (4.5 g / 10 minutes, melting point 110 ° C.), 0.5 parts by weight of synthetic silica, and 0.05 parts by weight of erucamide.
(B). Resin composition constituting the second layer Polylactic acid resin (PLA) (Mitsui Chemicals, trade name, LACEA H-400: density = 1.26 g / cm ³ , melt flow rate (MFR) = 2.7 g / 10 minutes, melting point 166 ° C.) 70.0 parts by weight, polybutylene terephthalate (manufactured by Mitsubishi Chemical Corporation, trade name, GS P1a AZ91T: density = 1.26 g / cm ³ , melt flow rate (MFR) = A resin composition was prepared by sufficiently kneading 10.0 parts by weight of 4.5 g / 10 minutes, melting point 110 ° C.) and 20.0 parts by weight of titanium oxide as a white pigment.
(C). Resin composition constituting third layer Polylactic acid resin (PLA) (Mitsui Chemicals, trade name, LACEA H-400: density = 1.26 g / cm ³ , melt flow rate (MFR) = 2.7 g / 10 minutes, melting point 166 ° C.) 60.0 parts by weight, polybutylene terephthalate (manufactured by Mitsubishi Chemical Corporation, trade name, GS P1a AZ91T: density = 1.26 g / cm ³ , melt flow rate (MFR) = 13.5 parts by weight (4.5 g / 10 minutes, melting point 110 ° C.), 1.5 parts by weight of carbon black as a black pigment, and 25.0 parts by weight of titanium oxide as a white pigment are sufficiently kneaded. A resin composition was prepared.
(D). Resin composition constituting the fourth layer The resin composition prepared in (a) above was used in the same manner.
(2). Next, using each of the resin compositions prepared above, using a three-kind four-layer top-blown air-cooled inflation coextrusion film forming machine, the layer of the resin composition of (A) is 5 μm, (B) The layer made of the resin composition is 20 μm, (c) the layer made of the resin composition is 8 μm, and the layer made of the resin composition (d) is co-extruded to 17 μm. A multilayer laminated film according to the present invention consisting of a 50 μm coextruded inflation film was produced.
When the multilayer laminated film produced above was visually recognized from the first layer side, it was milky white and excellent in aesthetics.
Furthermore, in the multilayer laminated film produced above, the light-shielding properties were sufficient, and each wavelength resulting from the oxidation of fats and oils was hardly transmitted, which was very good.

(1). First, the following resin compositions (a), (b), (c), (d) and (e) were prepared.
(I). Resin composition constituting the first layer Polylactic acid resin (PLA) (Mitsui Chemicals, trade name, LACEA H-400: density = 1.26 g / cm ³ , melt flow rate (MFR) = 2.7 g / 10 minutes, melting point 166 ° C.) 70.0 parts by weight, polybutylene terephthalate (manufactured by Mitsubishi Chemical Corporation, trade name, GS P1a AZ91T: density = 1.26 g / cm ³ , melt flow rate (MFR) = A resin composition was prepared by sufficiently kneading 30.0 parts by weight (4.5 g / 10 min, melting point 110 ° C.), 0.5 parts by weight of synthetic silica, and 0.05 parts by weight of erucamide.
(B). Resin composition constituting the second layer Polylactic acid resin (PLA) (Mitsui Chemicals, trade name, LACEA H-400: density = 1.26 g / cm ³ , melt flow rate (MFR) = 2.7 g / 10 minutes, melting point 166 ° C.) 70.0 parts by weight, polybutylene terephthalate (manufactured by Mitsubishi Chemical Corporation, trade name, GS P1a AZ91T: density = 1.26 g / cm ³ , melt flow rate (MFR) = A resin composition was prepared by sufficiently kneading 10.0 parts by weight of 4.5 g / 10 minutes, melting point 110 ° C.) and 20.0 parts by weight of titanium oxide as a white pigment.
(C). Resin composition constituting third layer Polylactic acid resin (PLA) (Mitsui Chemicals, trade name, LACEA H-400: density = 1.26 g / cm ³ , melt flow rate (MFR) = 2.7 g / 10 minutes, melting point 166 ° C.) 60.0 parts by weight, polybutylene terephthalate (manufactured by Mitsubishi Chemical Corporation, trade name, GS P1a AZ91T: density = 1.26 g / cm ³ , melt flow rate (MFR) = 13.5 parts by weight (4.5 g / 10 minutes, melting point 110 ° C.), 1.5 parts by weight of carbon black as a black pigment, and 25.0 parts by weight of titanium oxide as a white pigment are sufficiently kneaded. A resin composition was prepared.
(D). Resin composition constituting the fourth layer The resin composition prepared in (b) above was similarly used.
(E). Resin composition constituting the fifth layer The resin composition prepared in (a) above was similarly used.
(2). Next, using each resin composition prepared above, using a three-type five-layer top-blown air-cooled inflation co-extrusion film forming machine, the layer of the resin composition of (A) is 5 μm, The layer of (b) resin composition is 20 μm, the layer of (c) resin composition is 8 μm, the layer of (d) resin composition is 7 μm, and the layer of (e) resin composition is 10 μm. A multilayer laminated film according to the present invention consisting of five layers of coextruded inflation film having a total thickness of 50 μm was produced by extrusion.
When the multilayer laminated film produced above was visually recognized from the first layer side, it was milky white and excellent in aesthetics.
Furthermore, in the multilayer laminated film produced above, the light-shielding properties were sufficient, and each wavelength resulting from the oxidation of fats and oils was hardly transmitted, which was very good.

(1). First, the following resin compositions (a), (b), (c), (d) and (e) were prepared.
(I). Resin composition constituting the first layer Polylactic acid resin (PLA) (Mitsui Chemicals, trade name, LACEA H-400: density = 1.26 g / cm ³ , melt flow rate (MFR) = 2.7 g / 10 minutes, melting point 166 ° C.) 70.0 parts by weight, polyester elastomer (manufactured by Toray DuPont, trade name, High Retort 4057: density = 1.15 g / cm ³ , melting point 163 ° C., flexural modulus = 60 MPa) 30.0 parts by weight, 0.5 parts by weight of synthetic silica, and 0.05 parts by weight of erucamide were sufficiently kneaded to prepare a resin composition.
(B). Resin composition constituting the second layer Polylactic acid resin (PLA) (Mitsui Chemicals, trade name, LACEA H-400: density = 1.26 g / cm ³ , melt flow rate (MFR) = 2.7 g / 10 minutes, melting point 166 ° C.) 70.0 parts by weight, polyester elastomer (manufactured by Toray DuPont, trade name, High Retort 4057: density = 1.15 g / cm ³ , melting point 163 ° C., flexural modulus = 60 MPa) 10.0 parts by weight and 20.0 parts by weight of titanium oxide as a white pigment were sufficiently kneaded to prepare a resin composition.
(C). Resin composition constituting third layer Polylactic acid resin (PLA) (Mitsui Chemicals, trade name, LACEA H-400: density = 1.26 g / cm ³ , melt flow rate (MFR) = 2.7 g / 10 minutes, melting point 166 ° C.) 60.0 parts by weight, polyester elastomer (manufactured by Toray DuPont, trade name, high retort 4057: density = 1.15 g / cm ³ , melting point 163 ° C., flexural modulus = A resin composition was prepared by sufficiently kneading 13.5 parts by weight of 60 MPa), 1.5 parts by weight of carbon black as a black pigment, and 25.0 parts by weight of titanium oxide as a white pigment.
(D). Resin composition constituting the fourth layer The resin composition prepared in (b) above was similarly used.
(E). Resin composition constituting the fifth layer The resin composition prepared in (a) above was similarly used.
(2). Next, using each resin composition prepared above, using a three-type five-layer top-blown air-cooled inflation co-extrusion film forming machine, the layer of the resin composition of (A) is 5 μm, The layer of (b) resin composition is 20 μm, the layer of (c) resin composition is 8 μm, the layer of (d) resin composition is 7 μm, and the layer of (e) resin composition is 10 μm. A multilayer laminated film according to the present invention consisting of five layers of coextruded inflation film having a total thickness of 50 μm was produced by extrusion.
When the multilayer laminated film produced above was visually recognized from the first layer side, it was milky white and excellent in aesthetics.
Furthermore, in the multilayer laminated film produced above, the light-shielding properties were sufficient, and each wavelength resulting from the oxidation of fats and oils was hardly transmitted, which was very good.

(1). First, the following resin compositions (a), (b), (c), (d) and (e) were prepared.
(I). Resin composition constituting the first layer Polylactic acid resin (PLA) (Mitsui Chemicals, trade name, LACEA H-400: density = 1.26 g / cm ³ , melt flow rate (MFR) = 2.7 g / 10 minutes, melting point 166 ° C.) 70.0 parts by weight, polybutylene terephthalate (manufactured by Mitsubishi Chemical Corporation, trade name, GS P1a AZ91T: density = 1.26 g / cm ³ , melt flow rate (MFR) = A resin composition was prepared by sufficiently kneading 30.0 parts by weight (4.5 g / 10 min, melting point 110 ° C.), 0.5 parts by weight of synthetic silica, and 0.05 parts by weight of erucamide.
(B). Resin composition constituting the second layer Polylactic acid resin (PLA) (Mitsui Chemicals, trade name, LACEA H-400: density = 1.26 g / cm ³ , melt flow rate (MFR) = 2.7 g / 10 minutes, melting point 166 ° C. 64.0 parts by weight, adipic acid ester (manufactured by Daihachi Chemical Industry Co., Ltd., trade name, DAIFITYTY-101: density = 1.10 g / cm ³ , molecular weight = 338, viscosity = 19 mPa S) A resin composition was prepared by sufficiently kneading 16.0 parts by weight and 20.0 parts by weight of titanium oxide as a white pigment.
(C). Resin composition constituting third layer Polylactic acid resin (PLA) (Mitsui Chemicals, trade name, LACEA H-400: density = 1.26 g / cm ³ , melt flow rate (MFR) = 2.7 g / 10 minutes, melting point 166 ° C.) 60.0 parts by weight, adipic acid ester (manufactured by Daihachi Chemical Industry Co., Ltd., trade name, DAIFATTY-101: density = 1.10 g / cm ³ , molecular weight = 338, viscosity = 19 mPa S) A resin composition was prepared by sufficiently kneading 13.5 parts by weight, 1.5 parts by weight of carbon black as a black pigment, and 25.0 parts by weight of titanium oxide as a white pigment.
(D). Resin composition constituting the fourth layer The resin composition prepared in (b) above was similarly used.
(E). Resin composition constituting the fifth layer The resin composition prepared in (a) above was similarly used.
(2). Next, using each resin composition prepared above, using a three-type five-layer top-blown air-cooled inflation co-extrusion film forming machine, the layer of the resin composition of (A) is 5 μm, The layer of (b) resin composition is 20 μm, the layer of (c) resin composition is 8 μm, the layer of (d) resin composition is 7 μm, and the layer of (e) resin composition is 10 μm. A multilayer laminated film according to the present invention consisting of five layers of coextruded inflation film having a total thickness of 50 μm was produced by extrusion.
When the multilayer laminated film produced above was visually recognized from the first layer side, it was milky white and excellent in aesthetics.
Furthermore, in the multilayer laminated film produced above, the light-shielding properties were sufficient, and each wavelength resulting from the oxidation of fats and oils was hardly transmitted, which was very good.

(Experimental example)
About the multilayer laminated film which concerns on said Examples 1-5, (1), film thickness, (2). Total light transmittance, (3). The light shielding property was measured and evaluated.
(1). Measurement of film thickness This was measured from μ-meter manufactured by Sony Corporation.
(2). Measurement of total light transmittance This was evaluated by measuring the transmittance of all light rays using a model name, haze meter (SM-C) manufactured by Suga Test Instruments Co., Ltd.
(3). Measurement of light shielding properties This was evaluated by measuring the light transmittance in the region of 220 [nm] to 800 [nm] using a model name, UV-2400PC, spectrophotometer, manufactured by Shimadzu Corporation.
The measurement results are shown in Table 1 below.

(Table 1)
┌────┬────┬──────┬─────────────────┐ │ │ Film thickness │ Total light transmittance │ Light blocking effect (% ) │ │ ├────┼──────┼─────┬─────┬─────┤ │ │ [μm] │ [%] │500nm │550nm │650nm│ ├────┼────┼──────┼─────┼─────┼─────┤ │Example 1│ 50 │ 0.6 │ 0.2 │ 0.3 │ 0.8 │ ├────┼────┼──────┼─────┼─────┼─────┤ │Example 2│ 50 │ 0.6 │ 0.2 │ 0.4 │ 0.9 │ ├────┼────┼──────┼─────┼─────┼── ───┤ │Example 3│ 50 │ 0.3 │ 0.1 │ 0.2 │ 0.5 │ ├────┼────┼──────┼ ────┼─────┼─────┤ │Example 4│ 50 │ 0.3 │ 0.1 │ 0.2 │ 0.5 │ ├────┼──── ┼──────┼─────┼─────┼─────┤ │Example 5│ 50 │ 0.3 │ 0.1 │ 0.2 │ 0.5 │ └ ────┴────┴┴──────┴─────┴┴─────┴─────┘

  As is clear from the measurement results shown in Table 1 above, the multilayer laminated film according to the present invention has an appropriate light shielding property or light shielding property while maintaining the appearance, aesthetics, etc. The strength was strong, and it was sufficiently practical.

(Reference Example 1)
(1). The surface of the first layer of the multilayer laminated film according to the present invention produced in Example 1 is subjected to corona treatment, and then a two-component curable urethane adhesive (main agent: polyester polyol) on the corona treatment surface. And curing agent: aliphatic socyanate), and this is coated to a thickness of 4.0 g / m ² (in a dry state) using a gravure roll coating method, and an adhesive for laminating Then, a biaxially stretched nylon 6 film (trade name, Harden N-1102, manufactured by Toyobo Co., Ltd.) having a thickness of 15 μm is bonded to the surface of the adhesive layer for laminating, and the present invention is applied. The laminated material which concerns on was manufactured.
(2). Next, using the laminated material produced above, then cut out a front plate, a rear plate made of 100 mm × 150 mm, and an inverted V-shaped bottom plate formed with a notch at the end of 100 mm × 50 mm, The front plate and the rear plate are sealed from the impulse sealer on both sides of the 150 mm side, and then the bottom plate is sealed from the impulse sealer to the one-side unsealed portion, so that the self-supporting light shielding A self-supporting bag (standing pouch) according to the present invention as a packaging container was manufactured.
In the self-supporting bag manufactured as described above, the snack confectionery is filled and packaged from the opening, and then the opening is heat sealed to form the upper seal portion, so that the self-supporting property according to the present invention is achieved. A packaged product using bags was produced.
In the packaged product produced above, no leakage, overturning, buckling, etc. were observed, and no drop, leakage, etc. were observed when the drop test from 1.2 m was performed 5 times. .
Furthermore, no discoloration of the contents due to light was observed.
In addition, the packaged product manufactured above can be subjected to foreign matter inspection using a metal detector.

(Reference Example 2)
(1). The multilayer laminated film according to the present invention produced in Example 2 above is used, the surface of the first layer is subjected to corona discharge treatment, and then the two-component curable urethane adhesive (main agent) is applied to the corona-treated surface. : Polyester polyol, Curing agent: Aliphatic socyanate), and coating this with a gravure roll coat method to a thickness of 4.0 g / m ² (dry), and laminating adhesion An agent layer is formed, and then, a biaxially stretched nylon 6 film having a thickness of 15 μm is superposed on the surface of the laminating adhesive layer with the corona-treated surfaces facing each other, and then both are laminated with a dry laminate. And laminated.
Next, after applying the corona discharge treatment to the surface of the biaxially stretched nylon 6 film laminated as described above, a laminating adhesive layer is formed on the corona treatment surface in the same manner as described above, and thereafter A 12 μm-thick biaxially stretched polyethylene terephthalate film having a 200-nm-thick silicon oxide vapor-deposited film is laminated on the laminating adhesive layer surface with the silicon-oxide vapor-deposited film surface facing each other. Then, both were laminated by dry lamination to produce a laminate according to the present invention.
(2). Next, two sheets of the laminated material manufactured as described above are prepared, and the surfaces of the multilayer laminated film are opposed to each other, and then the outer peripheral edge is sealed in a three-way heat seal. A three-sided seal-type flexible packaging bag having an opening and an upper opening was produced.
In the three-sided seal type soft packaging bag produced above, water is filled and packaged from the opening, and then the opening is heat sealed to form the upper seal. A semi-finished packaging product is manufactured, and then the semi-finished packaging product is placed in a retort kettle and subjected to retort treatment under conditions of temperature, 120 ° C., pressure, 2.1 kgf / cm ² · G, time, 30 minutes. The retort packaged food according to the present invention was manufactured.
In the packaged product manufactured above, the multilayer laminated film as a heat seal material is excellent in properties such as strength and waist, and is excellent in transparency, slipperiness, impact resistance, tearability, etc. Furthermore, because it is excellent in heat seal characteristics, laminating characteristics, etc., almost no phenomena such as delamination are observed, and leakage of the packed and packed contents is not recognized, and its storability. In addition, it was possible to produce a fully satisfactory packaged product with excellent storage stability and the ability to fill and package the contents.
Furthermore, no discoloration of the contents due to light was observed.
In addition, the packaged product manufactured above can be subjected to foreign matter inspection using a metal detector.

(Reference Example 3)
(1). The surface of the first layer of the multilayer laminated film according to the present invention produced in Example 3 is subjected to corona treatment, and then the two-component curable urethane adhesive (main agent: polyester polyol) is applied to the corona treatment surface. And curing agent: aliphatic socyanate), and this is coated to a thickness of 4.0 g / m ² (in a dry state) using a gravure roll coating method, and an adhesive for laminating A layer was formed, and then a 20 μm-thick biaxially stretched polypropylene film was bonded to the surface of the laminating adhesive layer to produce a laminate according to the present invention.
(2). Next, two sheets of the laminated material manufactured as described above are prepared, and the surfaces of the multilayer laminated film are opposed to each other, and then the outer peripheral edge is sealed in a three-way heat seal. A three-sided seal-type flexible packaging bag having an opening and an upper opening was produced.
In the three-sided seal type soft packaging bag manufactured above, snack confectionery is filled and packaged from the opening, and then the opening is heat sealed to form the upper seal part. The packaged food according to the present invention was manufactured.
In the packaged product manufactured above, the multilayer laminated film as a heat seal material is excellent in properties such as strength and waist, and is excellent in transparency, slipperiness, impact resistance, tearability, etc. Furthermore, because it is excellent in heat seal characteristics, laminating characteristics, etc., almost no phenomena such as delamination are observed, and it is excellent in storage and storage, and is suitable for filling and packing contents. It was possible to produce a fully satisfactory packaged product.
Furthermore, no discoloration of the contents due to light was observed.
In addition, the packaged product manufactured above can be subjected to foreign matter inspection using a metal detector.

(Reference Example 4)
(1). Using the multilayer laminated film according to the present invention produced in Example 4 above, the surface of the first layer was subjected to corona discharge treatment, and then the two-component curable urethane adhesive (main agent) was applied to the corona-treated surface. : Polyester polyol, Curing agent: Aliphatic socyanate), and coating this with a gravure roll coat method to a thickness of 4.0 g / m ² (dry), and laminating adhesion An agent layer is formed, and then, a biaxially stretched nylon 6 film having a thickness of 15 μm is superposed on the surface of the laminating adhesive layer with the corona-treated surfaces facing each other, and then both are laminated with a dry laminate. And laminated.
Next, after applying the corona discharge treatment to the surface of the biaxially stretched nylon 6 film laminated as described above, a laminating adhesive layer is formed on the corona treatment surface in the same manner as described above, and thereafter A 12 μm-thick biaxially stretched polyethylene terephthalate film having a 200-nm-thick silicon oxide vapor-deposited film is laminated on the laminating adhesive layer surface with the silicon-oxide vapor-deposited film surface facing each other. Then, both were laminated by dry lamination to produce a laminate according to the present invention.
(2). Next, two sheets of the laminated material manufactured as described above are prepared, and the surfaces of the multilayer laminated film are opposed to each other, and then the outer peripheral edge is sealed in a three-way heat seal. A three-sided seal-type flexible packaging bag having an opening and an upper opening was produced.
The confectionery is filled and packaged from the opening in the three-side seal type soft packaging bag produced above, and then the opening is heat sealed to form the upper seal. A packaged product according to the present invention was manufactured.
In the packaged product manufactured above, the multilayer laminated film as a heat seal material is excellent in properties such as strength and waist, and is excellent in transparency, slipperiness, impact resistance, tearability, etc. Furthermore, because it is excellent in heat seal characteristics, laminating characteristics, etc., almost no phenomena such as delamination are observed, and leakage of the packed and packed contents is not recognized, and its storability. In addition, it was possible to produce a fully satisfactory packaged product with excellent storage stability and the ability to fill and package the contents.
Furthermore, no discoloration of the contents due to light was observed.
In addition, the packaged product manufactured above can be subjected to foreign matter inspection using a metal detector.

(Reference Example 5)
(1). The surface of the first layer of the multilayer laminated film according to the present invention produced in Example 5 is subjected to a corona treatment, and then a two-component curable urethane adhesive (main agent: polyester polyol) is applied to the corona treatment surface. And curing agent: aliphatic socyanate), and this is coated to a thickness of 4.0 g / m ² (in a dry state) using a gravure roll coating method, and an adhesive for laminating Then, a biaxially stretched nylon 6 film (trade name, Harden N-1102, manufactured by Toyobo Co., Ltd.) having a thickness of 15 μm is bonded to the surface of the adhesive layer for laminating, and the present invention is applied. The laminated material which concerns on was manufactured.
(2). Next, using the laminated material produced above, then cut out a front plate, a rear plate made of 100 mm × 150 mm, and an inverted V-shaped bottom plate formed with a notch at the end of 100 mm × 50 mm, The front plate and the rear plate are sealed from the impulse sealer on both sides of the 150 mm side, and then the bottom plate is sealed from the impulse sealer to the one-side unsealed portion, so that the self-supporting light shielding A self-supporting bag (standing pouch) according to the present invention as a packaging container was manufactured.
In the self-supporting bag manufactured as described above, the snack confectionery is filled and packaged from the opening, and then the opening is heat sealed to form the upper seal portion, so that the self-supporting property according to the present invention is achieved. A packaged product using bags was produced.
In the packaged product produced above, no leakage, overturning, buckling, etc. were observed, and no drop, leakage, etc. were observed when the drop test from 1.2 m was performed 5 times. .
Furthermore, no discoloration of the contents due to light was observed.
In addition, the packaged product manufactured above can be subjected to foreign matter inspection using a metal detector.

  The multilayer laminated film according to the present invention uses this as a light-shielding or light-shielding material or a heat-sealable resin layer or the like, and other substrates such as plastic films, paper substrates, oxygen gas Alternatively, it can be arbitrarily laminated with one or more kinds of various base film such as a barrier base material that prevents permeation of water vapor, cellophane, woven or non-woven fabric, glass plate, etc., and has various forms. The laminated material can be manufactured, and thus the laminated material can be made into a bag and applied to uses such as packaging materials constituting packaging bags having various forms, and the like.

It is a schematic sectional drawing which shows the layer structure of the example about the multilayer laminated film which concerns on this invention. It is a schematic sectional drawing which shows the layer structure of the example about the multilayer laminated film which concerns on this invention. It is a schematic sectional drawing which shows the layer structure of the example about the multilayer laminated film which concerns on this invention. It is a schematic sectional drawing which shows the layer structure of the example about the multilayer laminated film which concerns on this invention. It is a schematic sectional drawing which shows the layer structure of the example about the multilayer laminated film which concerns on this invention. It is a schematic sectional drawing which shows the layer structure of the example about the laminated material which concerns on this invention as a packaging material manufactured using the multilayer laminated film which concerns on this invention shown in said FIG. The schematic perspective view which shows the structure of the example about the packaging bag concerning this invention manufactured by bag-making the laminated material based on this invention manufactured using the multilayer laminated film which concerns on this invention shown in said FIG. It is. The schematic perspective view which shows the structure of the example about the packaging bag concerning this invention manufactured by bag-making the laminated material based on this invention manufactured using the multilayer laminated film which concerns on this invention shown in said FIG. It is.

Explanation of symbols

A Multi-layer laminated film A ₁ Multi-layer laminated film A ₂ Multi-layer laminated film A ₃ Multi-layer laminated film A ₄ Multi-layer laminated film B Laminated material C Packaging bag D Packaging product 1 Coextrusion multilayer laminated resin film 2 Light-shielding polylactic acid resin layer 2a Light-shielding 3 Polylactic acid resin layer 3 White polylactic acid resin layer 4 Transparent or translucent polylactic acid resin layer 11 Base film 12 Print pattern layer 21 Side seal part 22 Bottom seal part 23 Opening part 24 Contents 25 Upper sheet -Le

Claims (12)

A resin composition comprising a polylactic acid resin as a main component and further containing a black pigment ;
The main component is a polylactic acid resin, and further contains a black pigment and a white pigment, and the content of the black pigment is 0.1% to 5.0% by weight with respect to the polylactic acid resin. In addition, a resin composition having a white pigment content of 1 to 30 times the black pigment content;
A resin composition containing a polylactic acid resin as a main component;
A resin composition comprising a polylactic acid resin as a main component, a white pigment, and a white pigment content of 5.0 wt% to 30.0 wt% with respect to the polylactic acid resin. Each prepared and using these resin compositions,
The first layer is a transparent or translucent polylactic acid resin layer made of a resin composition containing the polylactic acid resin as a main component,
The second layer contains the above polylactic acid resin as a main component, further contains a white pigment, and the content of the white pigment is 5.0% by weight to 30.0% by weight with respect to the above polylactic acid resin. A white polylactic acid resin layer made of a resin composition comprising:
A resin composition comprising a polylactic acid resin as a main component and further containing a black pigment,
Alternatively , the polylactic acid resin is a main component, and further contains a black pigment and a white pigment, and the content of the black pigment is 0.1% by weight to 5.0% with respect to the polylactic acid resin. Resin composition consisting of 1% by weight and a white pigment content of 1 to 30 times the black pigment content
A light-shielding polylactic acid resin layer composed of any resin composition of
A multilayer laminated film composed of three types and four layers, in which the fourth layer is constituted by coextruding four layers in the order of a transparent or translucent polylactic acid resin layer with a resin composition containing the polylactic acid resin as a main component,
Or
The first layer is a transparent or translucent polylactic acid resin layer made of a resin composition containing the polylactic acid resin as a main component,
The second layer contains the above polylactic acid resin as a main component, further contains a white pigment, and the content of the white pigment is 5.0% by weight to 30.0% by weight with respect to the above polylactic acid resin. A white polylactic acid resin layer made of a resin composition comprising:
A resin composition comprising a polylactic acid resin as a main component and further containing a black pigment,
Alternatively , the polylactic acid resin is a main component, and further contains a black pigment and a white pigment, and the content of the black pigment is 0.1% by weight to 5.0% with respect to the polylactic acid resin. Resin composition consisting of 1% by weight and a white pigment content of 1 to 30 times the black pigment content
A light-shielding polylactic acid resin layer comprising any resin composition of
The fourth layer contains the polylactic acid resin as a main component, further contains a white pigment, and the content of the white pigment is 5.0% by weight to 30.0% by weight with respect to the polylactic acid resin. A white polylactic acid resin layer made of a resin composition comprising:
From the multilayer laminated film consisting of three types and five layers, wherein the fifth layer is composed of five layers coextruded in order of a transparent or translucent polylactic acid resin layer with a resin composition containing the polylactic acid resin as a main component. A multilayer laminated film characterized by comprising: The multilayer laminated film according to claim 1, wherein the light-shielding polylactic acid resin layer has a thickness of 3 μm to 30 μm. The multilayer laminated film according to any one of claims 1 and 2, wherein the transparent or translucent polylactic acid resin layer has a film thickness of 5 to 100 µm. The multi-layer laminated film according to any one of claims 1 to 3, wherein the white polylactic acid resin layer has a film thickness of 5 to 30 µm. The polylactic acid resin comprises a density, 1.10 to 1.30 g / cm 3, a melting point, 150 ° C. to 170 ° C., a melt flow rate (MFR), 1.0 to 20.0 g / 10 minutes, The multilayer laminated film according to any one of claims 1 to 4. The above-mentioned claim, wherein the polylactic acid resin comprises a mixed resin obtained by kneading a polylactic acid resin and a softening modifier at a blending ratio of 51 to 99 parts by weight of the former and 1 to 49 parts by weight of the latter. Item 6. The multilayer laminated film according to any one of Items 1 to 5. The multilayer according to claim 6, wherein the softening modifier comprises an aliphatic polyester resin other than polylactic acid resin, a plasticizer for polylactic acid resin, or a polyester-based thermoplastic elastomer. Laminated film. The other aliphatic polyester resin may be one or more of polybutylene succinate resin, polybutylene adipate resin, polybutylene sebacate, or polybutylene succinate adipate resin. The multilayer laminated film according to claim 7, wherein Polybutylene succine having another aliphatic polyester resin having a density of 1.20 to 1.30 g / cm 3, a melting point, 80 to 120 ° C., a melt flow rate (MFR), and 1.0 to 30.0 g / 10 minutes. The multilayer laminated film according to claim 8, wherein the multilayer laminated film is made of a resin. The multilayer laminated film according to claim 7, wherein the plasticizer for polylactic acid resin comprises an adipic acid ester. The multilayer according to any one of claims 1 to 10, wherein the black pigment is composed of one or more black pigments composed of iron black, graphite, or carbon black. Laminated film. 1 of white pigments in which the white pigment is composed of basic lead carbonate, basic lead sulfate, basic lead silicate, zinc white, zinc sulfide, lithopone, antimony trioxide, anatase-type titanium oxide, or rutile-type titanium oxide. It consists of seed | species thru | or 2 or more types, The multilayer laminated film as described in any one of said Claims 1-11 characterized by the above-mentioned.

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