JP2018167908A - Package - Google Patents

Abstract

To provide a package which can suppress or prevent adhesion even with a content containing a material having adhesiveness and can form a sealed space more reliably.SOLUTION: A packaging body for storing a content in a sealed space is characterized in that: (1) a sealed space is formed of a first film with some parts thereof adhered; 2) a second film for embracing the content in a state in which it can come into contact with the content is arranged in the closed space; 3) the second film comprises at least a) a base layer, b) a heat seal layer comprising a filling particle and a heat sealant and c) a functional layer comprising fine particles having hydrophobicity and/or lipophobicity in this order; and (4) the second film is fixed by being heat-sealed in a state where the functional layer can come into contact with the content.SELECTED DRAWING: Figure 9

Description

  The present invention relates to a novel package for housing foods, beverages, pharmaceuticals, cosmetics, chemicals and the like. More specifically, the present invention relates to a package that is particularly excellent in non-adhesiveness of contents containing an adhesive material and that can seal the contents by heat sealing.

  In various products such as foods, beverages, pharmaceuticals, and cosmetics, various contents such as yogurt, jelly, pudding, liquid detergent, toothpaste, retort food, syrup, dressing, and facial cream are packaged in a package. ing. For these packaging bodies, packaging materials having functions corresponding to the respective contents are used.

  For example, in recent years, products such as Western confectionery, Japanese confectionery, etc. have created a luxurious and appetizing appearance with the trend toward luxury. For example, confectionery such as cake is made with fresh cream, butter cream, whipped cream, Japanese sweets such as decorations and dumplings are topped with black honey, red bean paste, etc. However, since these materials such as fresh cream and black honey have a property (adhesiveness) that is easily attracted to other substances, some of them are detached and adhere to the packaging material. As a result, for example, a) appearance deteriorates as a product, b) hands are easily soiled when opened and taken out, c) difficult to eat, and d) separation and washing processing is troublesome when discarding packaging materials. May cause various problems. For this reason, the packaging material (packaging bag) is required to have a property that it is difficult to catch even an adhesive content.

  In order to prevent the contents from adhering to the packaging material, for example, 1) A technique for embossing the surface of the packaging material that comes into contact with the contents to give irregularities 2) Applying water and oil repellency treatments to the packaging material Techniques 3) Techniques for inserting an embossed anti-adhesion film into the packaging material have been proposed.

  For example, according to Patent Document 1, the contact area with the contents is reduced due to the uneven shape of the surface, and the amount of contents attached to the surface of the packaging material is reduced.

  Further, according to Patent Document 2, by forming a water / oil repellent layer using a silane coupling agent containing a fluorine functional group on the surface of the sealant film, water / oil repellency can be obtained without impairing heat sealability. A packaging material to be demonstrated has been proposed.

  Further, according to Patent Document 3, a liquid repellent layer to which a silicon-containing resin is added is used on the contact surface with the contents, and the liquid repellent layer and the heat seal layer are laminated, so that the heat seal performance is not impaired. A packaging material that can obtain liquid properties has been proposed.

JP 2007-308191 A Japanese Patent Laying-Open No. 2015-66770 Japanese Patent Laid-Open No. 2006-83815

  However, these packaging materials require further improvements. That is, the packaging material of Patent Document 1 is effective for preventing the adhesion of contents to the solid food, and the packaging materials of Patent Documents 2 and 3 are effective for preventing the adhesion of contents to the liquid food. When a content containing a material having adhesiveness (adhesiveness) is packaged, a sufficient adhesion preventing effect may not be obtained. For this reason, the problems such as a) to d) cannot be sufficiently solved.

  On the other hand, in order to achieve a high level of anti-adhesion effect, if a large amount of a treatment agent having water repellency / oil repellency is used on the surface in contact with the contents of the packaging material, the treatment agent inhibits heat sealability, etc. As a result of insufficient heat sealing, it may be difficult to form a package having a sealed space. A method of applying the treatment agent except for the heat-sealed area is also conceivable, but with such a method, alignment during heat sealing is not easy, and if the heat sealing position is shifted, the sealed space is surely secured. It becomes difficult to form.

  Therefore, an object of the present invention is to provide a package that can suppress or prevent adhesion even for a content containing an adhesive material and that can more reliably form a sealed space. .

  As a result of intensive studies in view of the problems of the prior art, the present inventor has found that a package having a specific configuration can achieve the above object, and has completed the present invention.

That is, the present invention relates to the following package.
1. A package for containing the contents in a sealed space,
(1) The sealed space is formed by bonding a part of the first film,
(2) A second film for holding the contents in a state where the contents can be contacted is disposed in the sealed space,
(3) The second film sequentially includes at least a) a base material layer, b) a heat seal layer containing filler particles and a heat seal agent, and c) a functional layer containing fine particles having hydrophobic and / or oleophobic properties,
(4) The second film is fixed to the first film by heat sealing in a state where the functional layer can contact the contents.
A package characterized by that.
2. Item 2. The package according to Item 1, wherein the packed particles are 1) polyolefin particles having an average particle diameter D50: 8 to 100 µm, 2) melting point: 110 to 180 ° C, and 3) specific gravity: 0.93 to 1.06.
3. Item 3. The package according to Item 1 or 2, wherein the coating amount of the heat seal layer is 0.5 to 10.0 g / m ² .
4). Item 4. The package according to any one of Items 1 to 3, wherein a polyolefin resin is laminated on at least one surface of the first film and the second film.
5. Item 5. The package according to any one of Items 1 to 4, wherein the adhesion amount of the fine particles having hydrophobicity and / or oleophobicity is 0.01 to 10 g / m ² .
6). Item 6. The package according to any one of Items 1 to 5, wherein the filled particles are high-density polyethylene particles having a density of 0.94 to 1.00 g / cm ³ .
7). A product in which the contents are filled and sealed in the sealed space of the package according to any one of Items 1 to 6.

  ADVANTAGE OF THE INVENTION According to this invention, even if it is the content containing the material which has adhesiveness, adhesion can be suppressed thru | or prevented, and the package which can form sealed space more reliably can be provided.

  In particular, in the package of the present invention, the second film included in the package has a specific layer configuration of base material layer / heat seal layer / functional layer and is heat sealed so that it is difficult to move in the package. As a result of being able to hold the contents effectively, it is possible to effectively suppress or prevent the contents from being caught on the inner surface of the package.

  Furthermore, in the present invention, even when the fixing portion of the second film is heat-sealed while being held between the first films, the heat-sealing layer of the second film can contribute to a strong heat-sealing. The sealed space can be more reliably formed in the package. In addition, since the second film can be heat sealed while being sandwiched between the first films, the heat sealing between the first films and the support of the second film can be performed at the same time. It can also contribute to the improvement of efficiency.

  The package of the present invention having such characteristics can be suitably used as a package for containing, for example, foods, beverages, pharmaceuticals, cosmetics, chemicals and the like.

2 is a schematic cross-sectional view of a side surface of a package manufactured in Example 1. FIG. 4 is a schematic cross-sectional view of a side surface of a package produced in Example 2. FIG. 6 is a schematic cross-sectional view of a side surface of a package manufactured in Comparative Example 1. FIG. 6 is a schematic cross-sectional view of a side surface of a package produced in Comparative Example 2. FIG. 10 is a schematic cross-sectional view of a side surface of a package manufactured in Comparative Example 3. FIG. It is a cross-sectional schematic diagram of the side surface of the package produced in Comparative Example 4. 10 is a schematic cross-sectional view of a side surface of a package produced in Comparative Example 5. FIG. In Test example 2, it is a figure which shows the position of a side seal and a back sticker seal. It is a cross-sectional schematic diagram of the side surface of the package of the present invention. It is a figure which shows the cross-section of the inclusion film of the package of this invention. In FIG. 9, it is the figure which looked at the package 10 of this invention from the Y direction.

1. Package The package of the present invention (the package of the present invention) is a package for containing the contents in a sealed space,
(1) The sealed space is formed by bonding a part of the first film,
(2) A second film for holding the contents in a state where the contents can be contacted is disposed in the sealed space,
(3) The second film sequentially includes at least a) a base material layer, b) a heat seal layer containing filler particles and a heat seal agent, and c) a functional layer containing fine particles having hydrophobic and / or oleophobic properties,
(4) The second film is fixed to the first film by heat sealing in a state where the functional layer can contact the contents.
It is characterized by that.

  In FIG. 9, the schematic diagram of the side surface cross section of this invention package body in the state in which the contents were accommodated is shown. The package 10 is a palm bag formed of a first film. In this package, a sealed space A is formed by a first film (exterior film) 1. More specifically, the sealed space A is formed by bonding (heat sealing) with an adhesive such as a heat sealing agent in the bonding portions H1, H2, and H3 at the edge of the exterior film 1. Preferably, the sealed space A for accommodating the contents is formed by (a) heat sealing between the exterior films and / or (b) heat sealing in a state where the exterior film and the inclusion film are laminated. desirable. FIG. 11 is a schematic diagram viewed from the Y direction of FIG. As shown in FIG. 11, the said adhesion part H3 is heat-sealed over the elongate direction of the back surface of a package body. Here, the bonding at the bonding portions H1 and H2 is referred to as a side seal, and the bonding at the bonding portion H3 is referred to as a back adhesion seal.

  In the sealed space A, a second film (inclusive film) 2 is disposed. As shown in FIG. 9, the inclusion film 2 is arranged in the sealed space A in a state where it can come into contact with the contents 3.

  For example, as shown in FIG. 10, the encapsulating film 2 includes a) a base material layer 21, b) a heat seal layer 22 including filler particles 22 a and a heat seal agent 22 b, and c) particles having hydrophobicity and / or oleophobicity. A laminated film in which the functional layers 23 to be included are sequentially laminated can be used. In addition, in FIG. 10, the description of the particle | grains which have the hydrophobic property and / or oleophobic which comprise the functional layer 23 is abbreviate | omitted. In the following, unless otherwise specified, the heat seal layer 22 containing filler particles and a heat seal agent is referred to as “the heat seal layer of the present invention” and is distinguished from other heat seal layers.

  The inner film 2 is arranged in a state in which the functional layer 23 can contact the contents 3. For example, in FIG. 9, since the surface where the inclusion film 2 contacts the contents is the b side, the outermost layer on the surface is the functional layer 23 (broken line portion) (hereinafter, FIGS. 1 to 7 are similarly broken lines). The inner film 2 may be arranged in the direction of “.”. The functional layer 23 and the content 3 (particularly the liquid food 3a of the content 3) may be always in contact with each other or may not be always in contact with each other. In addition, the functional layer may be formed in the a side of the inclusion film 2, and it does not need to be formed.

  The inner film 2 is fixed to the first film by heat sealing in the sealed space. In FIG. 9, both edge ends (two sides facing each other) of the substantially rectangular encapsulating film 2 are heat-sealed at the bonding portions H1 and H2. In FIG. 9, the remaining two opposing sides of the substantially rectangular inclusion film 2 are not fixed, but may be fixed as necessary.

  In the adhesive portions H1 and H2 in FIG. 9, heat sealing is performed in a state where both edge ends of the inner film 2 are inserted between the outer films 1. That is, in the adhesive portions H1 and H2, a laminated portion composed of “exterior film / inclusive film (base material layer 21 / heat seal layer 22 of the present invention / functional layer 23) / exterior film” is formed by heat sealing. In this case, part or all of the hydrophobic and / or oleophobic fine particles constituting the functional layer 23 are particularly embedded in the heat seal layer 22 of the present invention (or the heat seal layer (not shown) of the exterior film). By doing so, it is possible to realize strong adhesion. In this way, the sealing of the contents and the fixing of the inclusion film can be performed simultaneously.

  In addition, when forming a sealed space, in the case of having a plurality of bonding portions, the bonding is completed in advance except for bonding portions that can be openings for filling the contents, and after the contents are put through the openings, You may form a sealed space by adhere | attaching an opening part. For example, in the package 10 of FIG. 9, for example, only the bonding portions H1 and H3 are bonded in advance, and after filling the contents from the opening (unbonded region) at the position of the bonding portion H2, the bonding portion H2 is formed. May be.

Below, the material etc. which comprise this invention package are demonstrated in detail.
<First film>
The first film (exterior film) is used for constituting a packaging bag body formed by being partly adhered and enclosed and sealed by an adhesive portion.

  As the exterior film, any film that is generally used for packaging can be applied, and a commercially available product can also be used. For example, various films such as polyethylene, polypropylene, ethylene / vinyl acetate copolymer, polyester, and polyamide can be used. Among these, a polypropylene film is particularly preferable in that it has good heat sealability, gas barrier properties, and the like.

  In addition, as these exterior films, either an unstretched film or a stretched film can be used. In particular, it is preferable to use a biaxially stretched film in that heat shrinkage can be effectively suppressed. Therefore, in this invention, a biaxially stretched polypropylene film can be used conveniently. The biaxially stretched polypropylene film only needs to have biaxially stretched polypropylene as the main component, and may be a mixture of a small amount of other resins as long as the heat sealability is not impaired. In this invention, it is preferable that it is a biaxially-stretched polypropylene with high purity.

  The exterior film may be a single layer or a multilayer. Therefore, for example, a biaxially stretched polypropylene film can be used alone, or a laminated film formed by laminating another layer on at least one surface of the biaxially stretched polypropylene film can be used as an exterior film. Examples of other layers include an adhesive layer (preferably a heat seal layer) and a printing layer. An adhesive layer (preferably a heat seal layer), a printing layer, and the like can be formed according to a known method. In particular, the heat seal layer can be formed using the same heat seal agent as applied to the encapsulating film described later. For example, the heat seal agent containing polyolefin, such as a polypropylene, can be mentioned.

  The thickness of the exterior film is not particularly limited, and may be appropriately set according to the type of the exterior film used in the range of about 10 to 1000 μm. In particular, when a biaxially stretched polypropylene film is used as the exterior film, it is preferably 20 to 800 μm, and more preferably 30 to 50 μm. If the thickness of the biaxially stretched polypropylene film is less than 20 μm, the packaging material may greatly expand or contract in the width direction or the flow direction due to the drying heat of the packaging material, which may affect the processability. If the thickness of the biaxially stretched polypropylene film exceeds 800 μm, the tearability may be reduced.

  The form of the package formed by the exterior film is not particularly limited, and various types of bags such as a palm-sack bag, a three-sided bag, and a gusset bag can be employed. In the construction of the package, it is basically desirable that the exterior films are directly bonded together by heat sealing. As a result, a sealed space can be created more reliably and safely without using an adhesive or the like separately.

  In this case, the sealed space may be in a vacuum or a state close thereto, but is preferably in an aerated state. By adopting the aerated state, for example, even if the contents are soft, good shape retention can be ensured. Examples of the gas that can be filled in the sealed space include air, an inert gas (such as nitrogen gas), and a mixed gas thereof. If an inert gas is used, deterioration and alteration of the contents can be effectively suppressed.

  In the package formed by the exterior film, a printed layer may be provided on the outer surface (the surface in contact with the outside air). Examples of the print layer include information on contents, designs, barcodes, and the like. In order to make the contents filled in the package visible, it is preferable that at least a part of the packaging bag is transparent or translucent.

<Second film>
The second film (encapsulated film) is enclosed in the packaging bag body and used to hold the contents. The form of holding the contents is not limited. For example, in addition to holding the contents so that the exterior film wraps over the entire contents from the top of the inclusion film in the package, a part of the exterior film And the case of holding the contents with the inclusion film.

  The encapsulated film includes at least a) a base material layer, b) a heat seal layer of the present invention containing filler particles and a heat sealant, and c) a functional layer containing particles having hydrophobic and / or oleophobic properties. In the inclusion film 2 shown in FIG. 10, the heat seal layer 22 of the present invention containing the filler particles 22 a and the heat seal agent 22 b is laminated so as to be in contact with the base material layer 10, and so as to be in contact with the heat seal layer 22 of the present invention. The functional layer 23 is laminated. The functional layer 23 is the outermost layer of the inclusion film 2.

  Although the shape and size of the inner film 2 are not limited, it corresponds to a region where the content is visually recognized from the appearance of the packaging bag body, or a region where a material that easily adheres to the package is used. It is preferable that the part is configured so that the second film is in contact with the contents. For example, when a semi-solid or gel-like material such as coconut or cream in bakery and confectionery such as corné and dorayaki is exposed as the contents, the shape and size that comes into contact with the part in contact with the material It is sufficient that the inner film is disposed in the packaging bag body.

  Moreover, a part of the inclusion film 2 is fixed to the exterior film by heat sealing. As a result, the contents can be held in the package without slipping, and when the contents with the adhesive material exposed are filled, the contact between the encapsulated film and the part is released. Can be prevented.

  In the package of the present invention, it is preferable that the inner film is fixed at the adhesion portion of the outer film. That is, it is desirable to heat-seal with the inclusion film interposed between the exterior films when the exterior films are heat-sealed. Even in such a laminated state, it is possible to surely obtain high heat sealability and, consequently, hermeticity by the heat seal layer of the present invention for the encapsulated film. Moreover, since the exterior film and the inclusion film are bound together by the adhesive portion, even if the package is opened to take out the contents, the respective films are not separated and can be discarded together. Furthermore, since the joining of the exterior films and the fixing of the inclusion film can be performed at the same time, the production efficiency can be improved.

As the base material layer , as with the exterior film, any film that is generally used for packaging can be applied, and a commercially available product can also be used. For example, various films such as polyethylene, polypropylene, ethylene / vinyl acetate copolymer, polyester, and polyamide can be used. Among these, a polypropylene film is particularly preferable in that it has good heat sealability, visibility of contents, and the like. As the polypropylene film, a biaxially stretched polypropylene film or the like can be suitably used as in the case of the exterior film.

  The base material layer may be a single layer or a multilayer. In the case of a multilayer, a laminate obtained by laminating another layer (preferably a heat seal layer) on one side or both sides of a biaxially stretched film can be used as a base material layer. Therefore, for example, when a biaxially stretched polypropylene film is used, it can be used alone as a base material layer, and a laminated film formed by laminating another layer on one or both sides of a biaxially stretched polypropylene film is a base material layer. Can also be used. Examples of the other layer include an adhesive layer (preferably a heat seal layer). An adhesive layer (preferably a heat seal layer) or the like can be formed according to a known method. In particular, the heat seal layer can be suitably formed using the same heat seal agent used for forming the heat seal layer of the present invention. For example, the heat seal agent containing polyolefin, such as a polypropylene, can be mentioned.

Although it does not specifically limit as this invention heat seal layer filling particle | grains 22a, Especially the particle | grains (bead) which consist of synthetic resins can be used conveniently. For example, particles such as polyolefin such as polyethylene and polypropylene, copolymer resin of ethylene and acrylic acid (EAA), copolymer resin of ethylene and methyl methacrylate (EMMA), and the like can be suitably used. In particular, in the present invention, it is more preferable to use polyethylene particles and / or polypropylene particles, and polyethylene is more preferable from the viewpoint that high strength can be obtained in heat sealing.

The average particle size D ₅₀ of the filler particles is not particularly limited, it can be appropriately set within a range of normal 8~100μm according to the type of filler particles.

When polyethylene particles are used as the filler particles, the average particle size D50 is preferably 8 to ₅₀ μm, more preferably 10 to 25 μm. When the average particle diameter D ₅₀ of the polyethylene particles is less than 8 [mu] m, it may be preventing adhesion effect due to unevenness decreases. On the other hand, when the average particle diameter D50 of the polyethylene particles exceeds ₅₀ μm, the heat sealability is lowered, and there is a possibility that the binding with the first film cannot be maintained. Thereby, the shape-retaining property of the content and the content adhesion preventing property to the packaging bag may be deteriorated. In addition, when polyethylene particles having an average particle diameter D ₅₀ exceeding ₅₀ μm are applied to the second film, uneven coating tends to occur, which may affect the appearance or performance.

When using the polypropylene particles as filler particles, it is preferable that the average particle diameter _{D 50} and 8～25Myuemu, and more preferably, especially 8 to 20 [mu] m. When the average particle diameter D ₅₀ of the polypropylene particles is less than 8 [mu] m, it may be preventing adhesion effect due to unevenness imparting reduced. Also, if the average particle diameter D ₅₀ of the polypropylene particles is more than 25 [mu] m, the heat sealability is lowered, the first film and the binder may become impossible to maintain. As a result, the shape retention of the contents and the ability to prevent the contents from adhering to the packaging bag may be reduced. Also when the average particle diameter D ₅₀ coating the polypropylene particles in excess of 25μm in the second film, coating unevenness tends to occur, which may affect the appearance and performance.

  The melting point of the filler particles is not particularly limited, but may be set as appropriate depending on the type of filler particles to be used, particularly in the range of 100 to 180 ° C. When the melting point of the filler particles is less than 100 ° C., the filler particles are dissolved by the heat of drying during processing, and the desired unevenness imparting effect may not be obtained. Further, when the melting point of the filler particles exceeds 180 ° C., it may be a factor that hinders the sealing performance. From this standpoint, for example, when the filler particles are polyethylene particles, those having a melting point of 120 to 140 ° C. are preferable in that better heat sealability can be obtained. For example, when the filler particles are polypropylene particles, the temperature is preferably 150 to 158 ° C.

Further, the density of the packed particles is not particularly limited, but it is usually preferably 0.91 to 1.06 g / cm ³ . If the density of the packed particles is less than 0.91 g / cm ³ , the shape tends to be difficult to maintain because it becomes brittle. On the other hand, if the specific gravity of the filled particles exceeds 1.06 g / cm ³ , the particles tend to settle in the heat seal layer of the present invention, which may affect the processability. From this point of view, for example, when using a polyethylene particle as a filler particle, a density 0.94 g / cm ³ or more high-density polyethylene, suitably used the low density polyethylene of density 0.91~0.93g / cm ³ Can do. Among these, it is preferable to use a high density polyethylene having a density of 0.94 to 1.00 g / cm ³ in that a more excellent heat sealability can be obtained.

Furthermore, the coating amount of the heat seal layer 22 of the present invention on the surface of the encapsulating film is preferably 0.5 to 10.0 g / m ² per side, more preferably 1.0 to 6.0 g / m ^2. preferable. When the coating amount is less than 0.5 g / m ² , the heat sealability is lowered, the sealing property as a package cannot be secured, the content is oxidized, the content is leaked, and the shape is retained. There is a risk of deterioration of On the other hand, when the coating amount exceeds 10.0 g / m ² , the effect of providing irregularities is reduced, and the contents may adhere to the inner surface of the packaging container.

  As heat sealant 22b, in addition to known or commercially available sealant film components, those including components used for known or commercially available adhesives such as lacquer type adhesives, easy peel adhesives, hot melt adhesives, etc. Can do.

  The main component constituting the heat seal layer 22 of the present invention is not particularly limited. For example, low-density polyethylene, medium-density polyethylene, high-density polyethylene, linear (linear) low-density polyethylene, polypropylene, and ethylene-vinyl acetate are used. Polymer, ionomer resin, ethylene-acrylic acid copolymer, acrylic-vinyl chloride copolymer, ethylene-ethyl acrylate copolymer, ethylene-methacrylic acid copolymer, ethylene-methyl methacrylate copolymer, Polyolefin resins such as ethylene-propylene copolymer, methylpentene polymer, polybutene polymer, polyethylene, and polypropylene are used as unsaturated carboxylic acids such as acrylic acid, methacrylic acid, maleic acid, maleic anhydride, fumaric acid, and itaconic acid. Acid-modified polyolefin resin modified with acid, polyvinyl acetate Fats, poly (meth) acrylic resins, polyacrylonitrile resins, polyvinyl chloride resins, other heat-adhesive resins, blended resins thereof, copolymers containing combinations of these monomers, modified resins, etc. Can be used.

  Moreover, in the heat seal layer of the present invention, other components may be contained within a range not impeding the effects of the present invention. For example, a tackifier, an antiblocking agent, a coloring material, a thickener, etc. are mentioned. In particular, it is preferable to add a tackifier in that the viscosity can be adjusted when the coating agent is applied. It does not specifically limit as a tackifier, A well-known or commercially available thing can be used. In particular, an aliphatic ring saturated hydrocarbon resin, a hydrogenated rosin ester resin, and the like can be suitably used. Among them, an aliphatic ring saturated hydrocarbon resin (molecular weight: 700 to 800, melting point: 110 to 115 ° C.) is used. preferable. Moreover, an antiblocking agent can also be used suitably. The blocking inhibitor is not particularly limited, and for example, at least one of polyethylene wax, polypropylene wax, silica and the like can be suitably added.

Functional layer The functional layer includes fine particles having hydrophobicity and / or oleophobicity (hereinafter referred to as “functional particles”). Thereby, the functional layer can exhibit at least one of water repellency and oil repellency. For this reason, even when the contents come into contact with the functional layer, it is possible to suppress or prevent a phenomenon that a part of the contents falls off and adheres to the functional layer (that is, the inner film side). In this case, even if it is a content with much water | moisture content, adhesion can be suppressed suitably.

  As functional particles, those having hydrophobicity and / or oleophobicity are used. In this case, at least one of hydrophobic particles and oleophobic particles can be suitably used. The material of the functional particles is not particularly limited, and for example, inorganic oxide particles or composite particles whose particle surfaces are coated can be suitably used. As said inorganic oxide, at least 1 sort (s) of particle | grains (powder), such as a silicon oxide, a titanium oxide, aluminum oxide, a zinc oxide, can be used, for example. In particular, silicon oxide particles are preferable.

  The particle diameter of the functional particles is not limited, but from the viewpoint of hydrophobicity (water repellency) or oleophobicity (oil repellency), the average primary particle diameter is preferably 5 to 50 nm, particularly 7 to More preferably, it is 30 nm.

  In addition, in this invention, the measurement of primary particle average diameters, such as a functional particle, can be implemented using a transmission electron microscope or a scanning electron microscope. More specifically, the average primary particle diameter is obtained by photographing with a transmission electron microscope or a scanning electron microscope, measuring the diameter of 200 or more particles on the photograph, and calculating the arithmetic average value thereof. be able to.

  As the nano-level functional particles themselves, known or commercially available particles can be used. Moreover, what was manufactured by the well-known manufacturing method can also be used.

As the particles having hydrophobicity (water repellent particles), the product names “AEROSIL R972”, “AEROSIL R972V”, “AEROSIL R972CF”, “AEROSIL R974”, “AEROSIL RX200”, “AEROSIL RY200” (above, Japan) Aerosil Co., Ltd.), “AEROSIL R202”, “AEROSIL R805”, “AEROSIL R812”, “AEROSIL R812S” (above, manufactured by Evonik Degussa), “Silo Hovic 100” “Silo Hovic 200” “Silo Hovic” 603 "(Fuji Silysia Chemical Co., Ltd.) and the like. Examples of titania include “AEROXIDE TiO ₂ T805” (manufactured by Evonik Degussa). Examples of alumina include fine particles in which the product name “AEROXIDE Alu C” (manufactured by Evonik Degussa) is treated with a silane coupling agent to make the particle surface hydrophobic.

  Among these, in the present invention, hydrophobic silica fine particles can be suitably used. In particular, hydrophobic silica fine particles having a trimethylsilyl group on the surface are preferable in that better non-adhesiveness can be obtained. Examples of commercially available products corresponding to this include “AEROSIL R812” and “AEROSIL R812S” (both manufactured by Evonik Degussa).

As oleophobic particles (oil-repellent particles), product names “AEROSIL 200” (“AEROSIL” is a registered trademark; the same applies hereinafter), “AEROSIL 130”, “AEROSIL 300”, “AEROSIL 50”, “ Oil repellent particles whose core surface is coated with a polyfluoroalkyl methacrylate resin can be used with particles exemplified by “AEROSIL 200FAD”, “AEROSIL 380” (manufactured by Nippon Aerosil Co., Ltd.) and the like as the core. As the titanium oxide, for example, oil-repellent particles whose core surface is coated with a polyfluoroalkyl methacrylate resin using particles exemplified by the product name “AEROXIDE TiO ₂ T805” (manufactured by Evonik Degussa) as a core are used. it can. As the aluminum oxide, for example, oil-repellent particles whose core surface is coated with a polyfluoroalkyl methacrylate resin using particles exemplified by the product name “AEROXIDE Alu C 805” (manufactured by Evonik Degussa) as a core are used. it can.

  Since these oleophobic particles have a polyfluoroalkyl methacrylate resin on the surface thereof, they have excellent affinity with inorganic oxide particles, and therefore a strong coating layer with relatively high adhesion is formed on the particle surface. While being able to form, the high non-adhesiveness with respect to the content can be expressed.

  A known or commercially available polyfluoroalkyl methacrylate resin itself can be used. As a commercial item, for example, product name “CHEMINOX FAMAC-6” (manufactured by Unimatec (Japan)), product name “Zonyl TH Fluoromonomer code 421480” (manufactured by SIGMA-ALDRICH (USA)), product name “SCFC-65530- 66-7 "(manufactured by Maya High Purity Chem (CHINA)), product name" FC07-04-10 "(Fluory, Inc (USA)), product name" CBINDEX: 58 "(Wilshire Chemical Co., Inc (USA) Product name “Asahi Guard AG-E530”, “Asahi Guard AG-E060” (all manufactured by Asahi Glass Co., Ltd.), product name “TEMAc-N” (Top Fluorochem Co., LTD (CHINA)) Product name "Zonyl 7950" (manufactured by SIGMA-RBI (SWITZ)), product name "61000840-6100902" (manufactured by Weibo Chemical Co., Ltd (CHINA)), product name "CB INDEX: 75" (Manufactured by ABCR GmbH & CO. KG (GERMANY)).

  Among these, for example, a) polyfluorooctyl methacrylate, b) 2-N, N-diethylaminoethyl methacrylate, c) 2-hydroxyethyl methacrylate, and d) 2 from the point that more excellent water repellency and oil repellency can be achieved. A copolymer obtained by copolymerizing 2,2′-ethylenedioxydiethyldimethacrylate can be suitably used as the resin. These may also be commercial products as described above.

  In the package of the present invention, as the functional layer, for example, a) a layer including hydrophobic particles and oleophobic particles, a hydrophobic region including hydrophobic particles, and a layer including an oleophobic region including oleophobic particles are also employed. can do. By adopting such a layer, it is possible to suitably suppress or prevent adhesion even if the content is rich in moisture as well as moisture.

  The content of the functional particles in the functional layer is not particularly limited, and can usually be appropriately set within a range of 10 to 100% by weight. If the content of the functional particles is close to 100% by weight, a higher water repellency and / or oil repellency can be obtained. Therefore, for example, the content of the functional particles in the functional layer can be set to 98 to 100% by weight.

Although the adhesion amount of the functional particle in the functional layer (weight after drying) is not critical, it is preferable to be usually 0.01 to 10 g / ^{m 2,} that the 0.2 to 1.5 g / ^{m 2} more preferably, it is most preferred to 0.2~1g / ^{m 2.}

  The method for preparing the hydrophobic particles is not particularly limited, and a coating layer is formed according to a known coating method, granulation method, etc., using a polyfluoroalkyl methacrylate resin as a coating material on the inorganic oxide particles (powder). It ’s fine. For example, hydrophobic particles (oxide composite particles) are produced by a manufacturing method including a step of coating inorganic oxide particles (coating step) with a coating solution in which a liquid polyfluoroalkyl methacrylate resin is dissolved or dispersed in a solvent. Can be suitably prepared.

  In the said manufacturing method, a liquid thing can be used suitably at normal temperature (25 degreeC) and a normal pressure as polyfluoroalkyl methacrylate resin. As such a polyfluoroalkyl methacrylate resin, the commercial item illustrated above can also be used.

  The solvent used in the coating liquid is not particularly limited, and organic solvents such as alcohol and toluene can be used in addition to water. In the present invention, water is preferably used. That is, it is preferable to use a coating liquid in which a polyfluoroalkyl methacrylate resin is dissolved and / or dispersed in water as the coating liquid.

  The content of the polyfluoroalkyl methacrylate resin in the coating liquid is not particularly limited, but is generally within the range of 10 to 80% by weight, particularly 15 to 70% by weight, and more preferably 20 to 60% by weight. It is preferable to set.

  A method for coating the surface of the inorganic oxide particles with the coating solution may be a known method, and for example, any of a spray method, a dipping method, a stirring granulation method, and the like can be applied. In particular, in the present invention, coating by a spray method is particularly preferable in terms of excellent uniformity and the like.

  After coating the coating solution, the inorganic oxide composite particles can be obtained by removing the solvent by heat treatment. The heat treatment temperature is usually about 150 to 250 ° C., particularly preferably 180 to 200 ° C. The atmosphere of the heat treatment is not limited, but an inert gas (non-oxidizing) atmosphere such as nitrogen gas or argon gas is desirable. Further, for example, a series of steps including a coating step and a heat treatment step can be performed once or more as necessary. Thereby, it is possible to suitably control the coating amount.

2. The manufacturing method of this invention package is not restrict | limited in particular, For example, according to the form of a bag, the kind of content, etc., it can set suitably.

  In particular, in the present invention, when forming a bag body by heat sealing using an exterior film and an inclusion film, the exterior films are arranged so that the functional layer of the interior film can come into contact with the contents in the heat seal portion between the exterior films. The manufacturing method including the process of heat-sealing in the state which interposed the edge part of the interior film in between can be employ | adopted suitably.

  More specifically, the step of inserting the interior film from the opening of the exterior film formed into a tubular shape (tubular) so that the functional layer of the interior film can contact the contents, and both ends of the interior film A manufacturing method including a step of heat-sealing while sandwiching each with an exterior film can be suitably employed.

3. Use of packaging body The packaging body of the present invention can be used in the same manner as a known packaging body of a so-called middle belt type. In particular, the contents can be sealed by bonding (especially heat-sealing) the opening of the package after loading the contents into a space surrounded by the exterior film and the functional layer of the interior film in the package. . Thereby, even if the content by which the material which has fluidity | liquidity, such as cream, is arrange | positioned upwards contacts a package body especially, adhesion to the package body side can be suppressed or prevented effectively.

4). The product in which the contents are sealed in the package The present invention includes a product in which the contents are filled in the sealed space of the package of the present invention. The product is preferably manufactured by a manufacturing method including, for example, a step of loading at least one adhesive portion of the package of the present invention as an opening, loading the contents from the opening, and a step of heat-sealing the opening. can do.

  The contents include food (yogurt, jelly, pudding, confectionery bread, side dish bread, Western confectionery, Japanese confectionery, retort food, dressing, seasoning, etc.), beverages (soft drinks, jelly, etc.), pharmaceuticals (syrup preparations, etc.) Any cosmetics (such as a face-wash cream) can be used.

  The properties of the contents are not limited, and can be applied to, for example, a solid material or a fluid material. Further, the content may be either a gel or non-gel.

  Furthermore, the content may be a material containing at least one of moisture and oil (oils and fats), and the package of the present invention can be applied to a material containing both moisture and oil.

In particular, the packaging body of the present invention can be suitably used for packaging contents including materials that are easily caught on the inner surface of the packaging body. A typical example of such a material is a liquid material (including a semi-solid material, a gel-like substance, and the like). Among these, liquid materials having a relatively high viscosity at room temperature (for example, a viscosity at 25 ° C. of about 1 × 10 ³ to 1 × 10 ⁵ mPas) are generally easily caught on the inner surface of the package, and thus such materials The package of the present invention is also advantageous for packaging the contents exposed to the outside. Specific examples of such a liquid material include, for example, fresh bread, custard cream, whipped cream, bean paste, syrup, honey, jam, etc. And sugar beet bread with seasonings such as mayonnaise exposed to the outside.

  The features of the present invention will be described more specifically with reference to the following examples and comparative examples. However, the scope of the present invention is not limited to the examples.

Example 1
(1) Production of second film (encapsulated film) As a base material layer, a 40 μm-thick commercial heat-sealable film (a laminate in which a polypropylene resin heat seal layer is formed on both sides of a biaxially stretched polypropylene film) And the one side of which was corona-treated). Separately, with respect to 100 parts by weight of a commercially available polyolefin resin coating agent (heat seal coating agent), high-density polyethylene particles (HDPE, average particle diameter D ₅₀ : 12 μm, melting point: 136 ° C., density: 0.94 g / cm ³ ) A dispersion was prepared by mixing 10 parts by weight. The obtained dispersion was applied to the corona-treated surface of the film with a bar coater and dried under the conditions of 80 ° C. × 10 seconds to form the heat seal layer of the present invention containing filled particles and a heat seal agent. . In this way, a laminated film (rectangle of about 10 cm in length and about 20 cm in width) composed of “base material layer / heat seal layer of the present invention containing filler particles and heat sealant” was obtained. The target coating amount after drying of the dispersion was 4.5 g / m ² .
(2) Formation of functional layer A coating solution was prepared by dispersing 5 g of oil-repellent inorganic oxide composite particles in 100 ml of ethanol. The coating liquid was applied on the heat seal layer of the present invention of the laminated film prepared in (1) above using a bar coater, and dried under conditions of 100 ° C. × 10 seconds to form a functional layer. The target coating amount after drying was 0.6 g / m ² . Thus, the inclusion film was obtained.
As a method for preparing the composite particles, first, 5 g of commercially available silicon oxide fine particles (product name “AEROSIL 200” manufactured by Nippon Aerosil Co., Ltd., BET specific surface area: 200 m ² / g, average primary particle diameter of 12 nm) are placed in a reaction vessel. While being stirred under a nitrogen gas atmosphere, 500 g of a commercially available surface treatment agent was sprayed, and then stirred at 200 ° C. for 30 minutes, followed by cooling. As a result, powder of surface-modified silica fine particles (composite oxide fine particles) was obtained. As the surface treatment agent, an aqueous dispersion of a copolymer of polyfluorooctyl methacrylate, 2-N, N-diethylaminoethyl methacrylate, 2-hydroxyethyl methacrylate and 2,2′-ethylenedioxydiethyldimethacrylate (solid content concentration: 20% by weight) was used.
(3) Production of packaging bag and filling of contents As outer packaging, that is, as a first film (outer packaging film) constituting the packaging bag body, a commercially available film having a heat sealability of 40 μm (one side of a biaxially oriented polypropylene film) The laminate having a polypropylene resin heat seal layer formed thereon was used.
The packaging form was a back-fitted three-way seal (joint bag). Prior to loading the contents, the exterior film was pre-sealed with a heat seal to form a cylindrical body. In this case, heat sealing was performed with the polypropylene resin heat seal layers at both ends of the exterior film facing each other. After filling the contents (commercially available stick pan with whipped cream or honey) from the opening of the cylindrical body, the functional layer of the inclusion film prepared in (2) above is the upper surface of the contents (cream or honey The inclusion film was inserted into the cylindrical body so as to come into contact with the painted surface.
As the contents, specifically, two commercially available stick-shaped stick breads of about 25 g are prepared, and 10 g of commercially available whipped cream (35% fat content) or 10 g of pure honey is used on the top surface of the stick pan. did.
Thereafter, the contents were sealed by heat sealing at both openings (both ends) of the cylindrical body. At this time, as shown in FIG. 1, the side seals at both ends of the inclusion film 2 are arranged in a state where both ends (adhesion portions H1 and H2 in FIG. 9) are sandwiched between the two exterior films 1 and 1. went. Thereby, a laminated portion of “exterior film / inclusive film / exterior film” was formed at the end of the cylindrical body. The obtained packaged body had a size capable of sealing a commercially available stick pan, and had a length of about 21 cm, a width of about 14 cm, and a capacity of about 950 cc. The sealed space was filled with air.
The heat seal condition for the back-sealed seal is 150 ° C. × 3 kg / cm ² × 1 second using a 20 mm × 60 mm hot plate, and the heat seal condition for the side seal is 1 mm × 60 mm hot plate. 150 ° C. × 3 kg / cm ² × 1 second.
Through the above steps, a product in which the contents as shown in FIG. 1 were filled was obtained. Here, assuming that a confectionery in which a fluid material such as cream or honey is used only on the upper surface of the contents, the second film is in contact with the upper surface of the contents.

Example 2
A packaging material and a package using the same were prepared by the same method as in Example 1 except that the coating liquid prepared by the following method was used to form the functional layer, and then the contents were filled. In FIG. 2, the schematic of the state which filled the package with the contents is shown. The above coating liquid is a dispersion of hydrophobic inorganic oxide fine particles having a water repellency (product name “AEROSIL R812S” manufactured by Evonik Degussa, BET specific surface area: 200 m ² / g, average primary particle size of 7 nm) in 100 ml of ethanol. It was prepared by letting.

Example 3
In producing the second film (encapsulated film), 10 parts by weight of high density polyethylene particles (HDPE, average particle diameter D50: 11 μm, melting point: 130 ° C., density: 0.96 g / cm ³ ) are mixed. A package was prepared by the same method as in Example 1 except that the dispersion was prepared, and then the contents were filled.

Example 4
In preparing the second film (encapsulated film), polypropylene particles (PP, average particle diameter D50: 9.6 μm, melting point: 155 ° C., density: 0.94 g / cm ³ ) instead of high-density polyethylene particles 10 weight A package was prepared by the same method as in Example 1 except that the dispersion was prepared by mixing the parts, and then the contents were filled.

Example 5
In producing the second film (encapsulated film), the amount of high-density polyethylene particles (HDPE, average particle diameter D50: 12 μm, melting point: 136 ° C., density: 0.94 g / cm ³ ) is from 10 to 5 parts by weight. The dispersion was prepared by changing to a part and mixing this, and the package was prepared by the same method as in Example 1 except that the target coating amount after drying of the dispersion was 2.5 g / m ^2. After preparation, the contents were filled.

Example 6
In preparing the second film (encapsulated film), low-density polyethylene particles (LDPE, average particle diameter D50: 12 μm, melting point: 105 ° C., density: 0.93 g / cm ³ ) 10 weight instead of high-density polyethylene particles A package was prepared by the same method as in Example 1 except that the dispersion was prepared by mixing the parts, and then the contents were filled.

Example 7
In producing the second film (encapsulated film), instead of high-density polyethylene particles, a copolymer resin of ethylene and acrylic acid (EAA, average particle diameter D50: 10 μm, melting point: 101 ° C., density: 0.94 g / cm ³ ) A package was prepared by the same method as in Example 1 except that a dispersion was prepared by mixing 10 parts by weight, and then the contents were filled.

Example 8
In producing the second film (encapsulated film), a copolymer resin of ethylene and methyl methacrylate (EMMA, average particle size D50: 13 μm, melting point: 100 ° C., density: 0.94 g / cm instead of high-density polyethylene particles) ³ ) A package was prepared by the same method as in Example 1 except that a dispersion was prepared by mixing 10 parts by weight, and then the contents were filled.

Comparative Example 1
A package was prepared by the same method as in Example 1 except that the functional layer was not formed on the inner film, and the contents were filled. In FIG. 3, the schematic of the state which filled the package with the contents is shown.

Comparative Example 2
In Example 1 (3), the both ends of the inclusion film 2 were not sandwiched between the exterior films 1 and 1 and were not heat-sealed, and were free-sealed, and the exterior films were heat-sealed. In the same manner as in Example 1, a product in which the package was filled with the contents was obtained. In FIG. 4, the schematic of the state which filled the package with the contents is shown.

Comparative Example 3
(1) Production of laminated film The film used in Example 1 (3) (laminated body in which a polypropylene resin heat seal layer was formed on one side of a biaxially oriented polypropylene film) and Example 1 (1) were used. High density polyethylene particles and a heat seal coating agent were prepared. 10 parts by weight of polyethylene particles are mixed and dispersed in 100 parts by weight of the heat seal coating agent, and this dispersion is applied to the corona-treated surface of the film by a bar coater and dried at 80 ° C. for 10 seconds. A laminated film was obtained. The target coating amount after drying was 3.0 g / m ² .
(2) Adhesion of functional particles 5 g of inorganic oxide composite particles having oil repellency were dispersed in 100 ml of ethanol to prepare a coating solution. This coating solution was applied to the coated surface of the laminated film prepared in (1) above using a bar coater, and dried at 100 ° C. for 10 seconds to obtain an exterior film. The target coating amount after drying was 0.6 g / m ² .
As a method for preparing the composite particles, first, 5 g of commercially available silicon oxide fine particles (product name “AEROSIL 200” manufactured by Nippon Aerosil Co., Ltd., BET specific surface area: 200 m ² / g, average primary particle diameter of 12 nm) are placed in a reaction vessel. While being stirred under a nitrogen gas atmosphere, 500 g of a commercially available surface treatment agent was sprayed, and then stirred at 200 ° C. for 30 minutes, followed by cooling. As a result, powder of surface-modified silica fine particles (composite oxide fine particles) was obtained. As the surface treatment agent, an aqueous dispersion of a copolymer of polyfluorooctyl methacrylate, 2-N, N-diethylaminoethyl methacrylate, 2-hydroxyethyl methacrylate and 2,2′-ethylenedioxydiethyldimethacrylate (solid content concentration: 20% by weight) was used.
(3) Production of packaging bag and filling of contents The packaging form is a three-sided back-sealed seal (joint bag), and the outer film produced in (2) is used so that the surface to which the functional particles are attached is the inner surface. A cylindrical body was produced by performing a back sticking seal. Next, the contents were filled into the cylindrical body in the same manner as in Example 1 (3), and both sides were heat-sealed without loading the inclusion film. In FIG. 5, the schematic of the state which filled the package with the contents is shown.

Comparative Example 4
Hydrophobic hydrophobic inorganic oxide fine particles (product name “AEROSIL R812S” manufactured by Evonik Degussa, BET specific surface area: 200 m ² / g, average primary particle diameter 7 nm) Was prepared. A packaging material and a package using the same were prepared in the same manner as in Comparative Example 3 except that this coating solution was used, and then the contents were filled. In FIG. 6, the schematic of the state which filled the package with the contents is shown.

Comparative Example 5
In the laminate of Comparative Example 3 (1), a packaging material and a package using the same were prepared by the same method as in Comparative Example 3 except that the functional particles were not adhered, and then the contents were filled. In FIG. 7, the schematic of the state which filled the package with the contents is shown.

Test Example 1 (Adhesion test)
In the products obtained in Examples and Comparative Examples, after the contents were filled, they were refrigerated (4 ° C.) for 3 days. After 3 days, the package was opened and the adhesion area to the upper surface in contact with the contents in the packaging bag body was evaluated.
Specifically, Examples 1 and 2 are the adhesion area on the surface in contact with the contents of the second film, and Comparative Example 1 is the adhesion area on the surface in contact with the contents of the laminate. Examples 2-3 evaluated the adhesion area to the surface of the side which contacts the upper surface inside an exterior bag. When the amount of deposit was less than 10%, it was indicated as “◯”, when it was 10% or more but less than 30%, “△”, and when it was 30% or more, “X”. The results are shown in Table 1.

Test Example 2 (Evaluation of heat sealability)
The packaging form of the package using the packaging material of the present invention is a back-fitting three-sided seal, and the seal locations are two side seals and one back-adhered seal. Therefore, the heat seal strength of each seal form was measured. Table 1 shows the measurement results of the seal strength. In addition, the location which measures a side seal and a back sticker seal in FIG. 8 is shown.

Test example 2-1 (side seal strength)
Using a 1 mm x 60 mm hot plate, heat seal under conditions of 150 ° C x 3 kg / cm ² x 1 second, and then slit into strips so that the seal width is 15 mm, creating three test pieces each. did. The heat seal strength of these test pieces was measured with an autograph tester (EZ-LX manufactured by Shimadzu Corporation). Specifically, the seal strength (N) was a T peel test at a speed of 100 mm / min, three points were measured for each sample, and the average overstrength strength (N) was obtained. Considering the heat seal strength of practical packaging materials, 6N / 15mm or more is “◎”, 4N / 15mm or more and less than 6N / 15mm is “◯”, 2N / 15mm or more and less than 4N / 15mm is “△”, 2N / Samples of less than 15 mm were denoted as “x”.

Test example 2-2 (back adhesive strength)
Heat sealing is performed using a 20 mm x 60 mm hot plate under the conditions of 150 ° C x 3 kg / cm ² x 1 second, and then slits are formed in a strip shape so that the seal width is 15 mm. did. The heat seal strength of these test pieces was measured with an autograph tester (EZ-LX manufactured by Shimadzu Corporation). Specifically, the seal strength (N) was a T peel test at a speed of 100 mm / min, three points were measured for each sample, and the average overstrength strength (N) was obtained. Considering the heat seal strength of the packaging material in practical use, 4N / 15mm or more is indicated as “◯”, 2N / 15mm or more and less than 4N / 15mm as “Δ”, and samples less than 2N / 15mm as “X”.

  From the above results, it can be seen that the package of each example can effectively prevent adhesion even if the contents include cream or honey. At the same time, the heat sealability is sufficient, and the sealed space can be formed reliably, so that it can be practically used as a package for foods and the like. On the other hand, the packaging of each comparative example deteriorates the heat sealability when the anti-adhesion property is enhanced, and the anti-adhesion property cannot be obtained when the heat seal property is enhanced. As a result, both the anti-adhesion property and the heat seal property are achieved. It was difficult to make. In addition, when heat sealing is performed without sandwiching the inclusion film between the exterior films, the contents may not be fixed well in the package, and the inclusion film may be displaced during transportation or the like, and part of the contents may adhere to the package It turns out that occurs.

Claims (7)

A package for containing the contents in a sealed space,
(1) The sealed space is formed by bonding a part of the first film,
(2) A second film for holding the contents in a state where the contents can be contacted is disposed in the sealed space,
(3) The second film sequentially includes at least a) a base material layer, b) a heat seal layer containing filler particles and a heat seal agent, and c) a functional layer containing fine particles having hydrophobic and / or oleophobic properties,
(4) The second film is fixed to the first film by heat sealing in a state where the functional layer can contact the contents.
A package characterized by that. Filling particles, 1) the average particle size _D 50: _8~100μm, 2) melting point: 100 to 180 ° C. and 3) Density: 0.91~1.06g / cm particles of ³ polyolefin, according to claim 1, wherein Packaging. The package of Claim 1 or 2 whose coating amount of a heat seal layer is 0.5-10.0 g / m < ² >. The package according to any one of claims 1 to 3, wherein a polyolefin resin is laminated on at least one surface of the first film and the second film. The package body in any one of Claims 1-4 whose adhesion amount of the microparticles | fine-particles which have hydrophobicity and / or oleophobicity is 0.01-10 g / m < ² >. The package according to any one of claims 1 to 5, wherein the filler particles are high-density polyethylene particles having a density of 0.94 to 1.00 g / cm ³ . A product in which the contents are filled and sealed in the sealed space of the package according to any one of claims 1 to 6.