JP7245281B2 - package - Google Patents

Description

The present invention relates to a package for sanitary paper such as paper towels.

Disposable papers such as tissue paper and paper towels are widely used as sanitary papers for sanitary purposes.

And among paper towels, mainly in the kitchen, draining meat, fish, vegetables, etc., draining oil; laying on a cutting board; wiping dishes; wiping oil from frying pans; is also called kitchen paper (including cooking paper), and is well known as a kind of household paper.

Such sanitary paper is usually packaged in a plastic film packaging bag and marketed, but it has been proposed to use paper as the packaging bag (Patent Document 1 [0017]).

JP 2003-104449 A

However, since the sanitary paper is relatively fuzzy, when the paper packaging bag comes into contact with the sanitary paper, the sanitary paper tends to get caught in the packaging bag, making the packaging operation difficult.

Therefore, by using a packaging bag made of laminated paper having a paper base material and a thermoplastic resin layer, and by packaging sanitary paper so that the thermoplastic resin layer forms the inner surface of the packaging bag, However, it is conceivable to suppress the sanitary paper from being caught in the packaging bag.

However, in that case, if the thermoplastic resin layer of the laminated paper is strongly pressed against the sanitary paper by an external force from a finger or the like when the packaging bag is opened, friction between the thermoplastic resin layer and the sanitary paper will cause In addition, the laminated paper may become difficult to move on the sanitary paper, making it difficult to open the package.

To provide a packaging body of sanitary paper which prevents the sanitary paper from being caught in the packaging bag even though the packaging bag is made of paper and which is easy to open.

As a result of intensive studies, the present inventors
(1) Packaging work by using a packaging bag made of laminated paper having a paper base material and a thermoplastic resin layer, and packaging sanitary paper so that the thermoplastic resin layer forms the inner surface of the packaging bag. To suppress the catching of the sanitary paper on the packaging bag inside, and
(2) The inventors have completed the present invention by adding a lubricant to the thermoplastic resin layer to make the laminated paper easier to move on the sanitary paper, thereby facilitating the opening operation.

The present invention
sanitary paper, and
A packaging body comprising a packaging bag for packaging the sanitary paper,
The packaging bag is made of laminated paper having a paper base material and a thermoplastic resin layer,
The laminated paper has an opening portion,
It relates to a package, wherein the thermoplastic resin layer forms the inner surface of the packaging bag and contains a lubricant.

It is preferable that the opening portion has perforations.

It is preferred that the paper substrate has a basis weight of 10 g/m ² to 90 g/m ² .

Preferably, the paper substrate is crepe paper.

The thickness of the thermoplastic resin layer is preferably 10 μm to 30 μm.

Preferably, the laminated paper has a plurality of thermoplastic resin layers, and the thermoplastic resin layer forming the inner surface of the packaging bag contains the lubricant.

The thickness of the laminated paper is preferably 30 μm to 200 μm.

The thermoplastic resin layer preferably contains polyolefin.

Preferably, said polyolefin is an ethylene homopolymer or copolymer.

Said copolymer of ethylene is preferably a copolymer of ethylene with propylene and/or an α-olefin.

The thermoplastic resin layer preferably contains a thermoplastic resin having a melting temperature of 80° C. or higher as measured by JIS K7121.

Preferably, the lubricant is a fatty acid amide.

Preferably, the thermoplastic resin layer is an extrusion coating layer.

It is preferable that the paper base material exists on the outer surface side of the packaging bag.

It is preferable that at least a part of the outer surface of the packaging bag is non-slip.

Preferably, the non-slip is a varnish hardened layer.

It is preferable that the packaging bag is heat-sealed.

Preferably, the packaging bag has at least one air hole.

It is preferable that the sanitary paper is contained in the packaging bag in a pop-up manner.

Preferably, the sanitary paper is a paper towel.

Although the packaging bag of the present invention uses a paper packaging bag, the packaging bag is provided with a thermoplastic resin layer, and the smooth surface of the thermoplastic resin layer contacts the sanitary paper. It is possible to suppress the sanitary paper from being caught in the bag. Therefore, the package of the present invention facilitates packaging of the object to be packaged.

In addition, in the package of the present invention, since the thermoplastic resin layer forming the inner surface of the packaging bag contains a lubricant, the thermoplasticity of the laminated paper is reduced by an external force from a finger or the like when the packaging bag is opened. Even if the resin layer is strongly pressed against the sanitary paper, the friction between the thermoplastic resin layer and the sanitary paper can be suppressed, and the laminated paper can easily move on the sanitary paper. Therefore, the package of the present invention is easy to open.

When the laminated paper has a plurality of thermoplastic resin layers and the thermoplastic resin layer forming the inner surface of the packaging bag contains a lubricant, the inner surface of the packaging bag can be smoothed while suppressing friction between the laminated paper and the sanitary paper. and no lubricant is blended in the thermoplastic resin layer in contact with the paper substrate, it is possible to avoid the influence of the lubricant on the adhesion between the paper substrate and the thermoplastic resin layer as a whole. .

When crepe paper is used as the paper base material, the stretchability of the packaging bag is increased, so that the deformation followability to external force is improved, and tearing of the packaging bag can be suppressed.

When the thermoplastic resin layer contains a thermoplastic resin having a melting temperature of 80° C. or more as measured by JIS K7121, the strength of the packaging bag is improved, and tearing of the packaging bag can be suppressed.

When at least a part of the outer surface of the packaging bag has a non-slip surface, for example, when the packaging bag is gripped with fingers or the like to open the opening portion, the gripping portion of the packaging bag can be made less slippery. It becomes possible, and opening work can be made easier.

In addition, in the present invention, since the thermoplastic resin layer can be heat-sealed, the package can be easily manufactured.

In addition, since the package of the present invention uses a paper-based packaging bag, environmental pollution, etc. due to residual plastic in the environment at the time of disposal is less than in the case of using a plastic film packaging bag. of environmental problems can be addressed.

Furthermore, since the paper used as the base material of the packaging bag is originally a plant-derived organic substance and a carbon-neutral renewable resource, it is possible to reduce the burden on the environment. Therefore, the packaging of the present invention is environmentally friendly.

The figure which shows one embodiment of the package of this invention. FIG. 2 is an enlarged cross-sectional view of one mode of laminated paper; FIG. 4 is an enlarged cross-sectional view of another aspect of laminated paper; The figure which shows the installation location example of an anti-slip layer.

The present invention provides sanitary paper, and
A packaging body comprising a packaging bag containing the sanitary paper,
The packaging bag is made of laminated paper having a paper base material and a thermoplastic resin layer,
The laminated paper has an opening portion,
It relates to a package, wherein the thermoplastic resin layer forms the inner surface of the packaging bag and contains a lubricant.

[Sanitary paper]
The packaging of the present invention includes sanitary paper. Sanitary paper is paper used for the purpose of improving hygiene. cotton) and other disposable papers (see, for example, Paper and Pulp Technology Handbook, 5th Edition, page 459, published on January 30, 1992, edited and published by the Association of Pulp and Paper Technology). Sanitary paper is also called sanitary paper (JIS P0001:1998).

As the sanitary paper in the present invention, paper towels such as kitchen paper are preferable. Kitchen paper (including cooking paper) is mainly used in the kitchen to drain water and oil from meat, fish, vegetables, etc.; Used for wiping dirt, etc.

Sanitary paper is porous and has the ability to absorb liquids. Liquids include water, oil, and the like. Therefore, the sanitary paper used in the present invention has water and oil absorbency and is suitable for use in kitchens, for example.

The fiber material constituting the sanitary paper is not particularly limited, and includes natural fibers such as cotton, wood pulp, and wool, recycled fibers such as rayon, and synthetic polymers such as vinylon, nylon, polyester, polyethylene, polypropylene, and acrylic. Mention may be made of manufactured synthetic fibers. These fibers may be used singly or may be mixed and combined. As the fibrous material constituting the sanitary paper, wood pulp is preferable, and virgin wood pulp, waste paper pulp, or a mixture thereof can be used. Examples of wood pulp include softwood pulp such as NBKP (bleached softwood kraft pulp) and NUKP (unbleached softwood pulp), and hardwood pulp such as LBKP (bleached hardwood kraft pulp) and LUKP (unbleached hardwood pulp). It is possible to use each alone or a mixture in an appropriate ratio, for example, the ratio of softwood pulp: hardwood pulp is 1 (25%): 3 (75%) to 1 (50%): It can be 1 (50%).

The basis weight of the sanitary paper is not particularly limited, but the basis weight (measurement method: JIS P 8124 [2011]) is preferably 10 g/m ² to 100 g/m ² , and 30 g/m ² to 50 g/m ² . more preferred. The thickness of the sanitary paper is not particularly limited, but the thickness (measurement method: JIS P 8118 [2014]) is preferably 50 μm to 300 μm, more preferably 80 μm to 200 μm.

The sanitary paper used in the present invention preferably has irregularities on one surface or both surfaces. The unevenness may exist on a part of the surface of the sanitary paper, or may exist on the entire surface.

The unevenness is preferably provided by embossing. The height of the unevenness (vertical height from the bottom surface of the concave portion to the level of the top of the convex portion) is not particularly limited, but may be, for example, 0.1 mm to 5 mm or 1 mm to 3 mm.

The form of the sanitary paper is not particularly limited, and it may be in the form of a roll of long sanitary paper. More preferably housed in a bag. The sanitary paper may be used by folding one sheet (so-called 1-ply) in two, or by folding in two a set of a laminated structure of two sheets (so-called 2-ply) or three sheets (so-called 3-ply) or more. It may be used in the same manner as one sheet.

It is preferable that the sanitary paper is contained in the packaging bag in a pop-up manner. With the pop-up type, after the sanitary paper is taken out from the packaging bag, part of the next sanitary paper comes out of the packaging bag, so that the next sanitary paper can be easily taken out.

The sanitary paper is preferably not clothing such as diapers, adult incontinence pants, infant training pants and the like.

[Packaging bag]
The packaging body of the present invention includes a packaging bag for packaging sanitary paper. The packaging bag has an outer surface and an inner surface.

The packaging bag of the present invention can be opened, and the sanitary paper in the packaging bag can be taken out from the unsealed portion. Although the packaging bag may have two or more layers, it is preferable that the bag has a single layer from the viewpoint of ease of opening.

The shape of the packaging bag is not particularly limited, and can be, for example, a non-box shape or a box shape. In addition, it is preferable that the packaging bag is deformable in order to improve handling properties such as packing and transporting properties.

Preferably, the packaging bag of the present invention has at least one air hole. The air holes have the function of discharging the air inside the packaging bag to the outside, and by discharging the air inside the packaging bag to the outside, the volume of the packaging bag is reduced, and for example, the packing of the packaging bag is facilitated. be able to.

The air holes can be formed, for example, by piercing laminated paper or a packaging bag made of laminated paper with at least one needle or the like.

The number of air holes is not particularly limited, but is preferably plural, preferably 2 to 100, more preferably 10 to 50, per packaging bag.

The (cross-sectional) shape of the air holes is not limited. For example, the shape of the air holes may be circular or non-circular, and examples of non-circular air hole shapes include short slits.

The interval between the air holes is not particularly limited. For example, the air hole spacing can range from 10 mm to 50 mm, preferably from 15 mm to 40 mm, and more preferably from 20 mm to 30 mm.

The installation density of the air holes is also not particularly limited. For example, the installation density of the air holes can be in the range of 1 to 10/25 cm ² , preferably in the range of 2 to 8/25 cm ² , and 3 to 6/25 cm with respect to the surface where the air holes are present. A range of ² is more preferred.

The distribution of the air holes can be uniform or non-uniform. For example, when the packaging bag is box-shaped, it is preferable to form the air holes on the sides of the packaging bag.

One or more air hole rows may be formed by arranging a plurality of air holes in a straight line to form a row. The interval between the air hole rows is not limited, but can be, for example, 5 mm to 50 mm, 10 mm to 40 mm, or 15 mm to 30 mm.

[Laminated paper]
The packaging bag in the package of the present invention is made of laminated paper having a paper substrate and a thermoplastic resin layer. The number of paper substrates constituting the laminated paper is not particularly limited, but the laminated paper preferably consists of one paper substrate.

The thickness of the laminated paper used in the present invention (measurement method: JIS P 8118 [2014]) is preferably 30 μm to 200 μm, more preferably 70 μm to 150 μm.

The basis weight of the laminated paper used in the present invention is preferably 30 g/m ² to 120 g/m ² , more preferably 40 g/m ² to 100 g/m ² .

The laminated paper used in the present invention preferably has a density of 0.40 g/cm ³ to 1.00 g/cm ³ , more preferably 0.50 g/cm ³ to 0.70 g/cm ³ .

The laminated paper used in the present invention has an opening portion. The number of openings is not particularly limited, and the laminated paper may have one or more openings.

The shape of the unsealable portion is not particularly limited, and may be any shape as long as the laminated paper can be unsealed. However, it is preferable that the unsealable portion has perforations.

The position of the unsealing portion is not particularly limited, either, and can be arranged at any position of the package of the present invention. For example, when the package of the present invention is substantially box-shaped, it is possible to provide an opening portion on one of the surfaces constituting the substantially box-like shape, and to provide the opening portion on the upper surface of the substantially box-shaped package. is preferred.

(Paper substrate)
The paper that serves as the base material of the laminated paper that constitutes the packaging bag of the present invention preferably has a basis weight of 10 g/m ² to 90 g/m ² (measurement method: JIS P 8124 [2011]). Also, the basis weight of the paper is preferably 15 g/m ² to 80 g/m ² , more preferably 20 g/m ² to 70 g/m ² .

The thickness of the paper substrate (measurement method: JIS P 8118 [2014]) is preferably 20 μm to 300 μm, more preferably 50 μm to 200 μm.

When a paper having the above basis weight and/or paper thickness is used as a base material, the laminated paper used in the present invention has particularly excellent flexibility because the paper base material is thin paper, It can have high deformability. Therefore, the packaging bag of the present invention made of laminated paper having thin paper as a base material has excellent deformation followability against external force and is resistant to tearing.

There are no particular restrictions on the fiber materials that make up the paper base material, and natural fibers such as cotton, wood pulp, and wool; recycled fibers such as rayon; Mention may be made of synthetic fibers made from molecules. These fibers may be used singly or may be mixed and combined.

Wood pulp is preferable as the fibrous material constituting the paper substrate, and virgin wood pulp, waste paper pulp, or a mixture thereof can be used. Examples of wood pulp include softwood pulp such as NBKP (bleached softwood kraft pulp) and NUKP (unbleached softwood pulp), hardwood pulp such as LBKP (bleached hardwood kraft pulp) and LUKP (unbleached hardwood pulp), and softwood pulp. Mixtures of pulp and hardwood pulp can be used.

Preferably, the paper substrate is crepe paper. Crepe paper has many wrinkles and therefore has excellent stretchability. Therefore, by using crepe paper as the paper base material, the packaging bag of the present invention can be provided with high deformability. In particular, by using crepe paper as the paper base material, the packaging bag of the present invention has excellent stretchability, and the ability to follow deformation to external force is improved, so tearing of the packaging bag can be suppressed.

Basis weight of crepe paper (measurement method: JIS P 8124 [2011]) is preferably 20 g/m ² to 90 g/m ² , more preferably 25 g/m ² to 70 g/m ² , and 30 g/m ² to 50 g/m 2 . ^m2 is even more preferred.

The paper thickness of the crepe paper (measurement method: JIS P 8118 [2014]) is preferably 50 μm to 300 μm, more preferably 80 μm to 200 μm.

Crepe paper can be manufactured by a conventionally known method. For example, wet paper is pressed against the surface of a heated cylindrical Yankee dryer to adhere to it, and after a certain amount of drying, the paper body is peeled off from the Yankee dryer via a doctor blade and creped. can be done.

When crepe paper is used as the paper base material, contact points between the packaging bag and the sanitary paper are reduced, so that the sanitary paper can be further suppressed from being caught on the packaging bag. Therefore, it is possible to further facilitate the packaging of the object to be packaged.

(Thermoplastic resin layer)
The laminated paper used in the present invention comprises a thermoplastic resin layer on a paper substrate. The number of thermoplastic resin layers is not particularly limited, and a plurality of thermoplastic resin layers may be present, but the number of thermoplastic resin layers is preferably one or two. By limiting the number of thermoplastic resin layers on the paper substrate to one or two, the total thickness of the paper substrate and the thermoplastic resin layer can be suppressed.

The thermoplastic resin layer does not need to be present on the entire surface of the paper substrate, and may be present on at least a portion (for example, an edge) of the surface of the paper substrate, but is preferably present on the entire surface of the paper substrate. . Further, the thermoplastic resin layer is preferably present on one surface of the paper substrate, whether it is a single layer or multiple layers.

When there are multiple thermoplastic resin layers, it is preferable that the thermoplastic resin layers are adjacent to each other.

Since the laminated paper used in the present invention has a thermoplastic resin layer, the package can be easily manufactured by melting and heat-sealing the thermoplastic resin layer.

When thin paper having relatively low heat insulating properties is used as the paper base material, heat is applied from the back side of the thin paper to melt the thermoplastic resin present on the surface of the thin paper to facilitate heat sealing. can be done.

In the present invention, since the packaging bag is composed of the laminated paper having the paper base material and the thermoplastic resin layer, the strength of the packaging bag can be improved as compared with the case where the packaging bag is composed only of the paper base material.

Further, in the present invention, since a paper base material is used, the packaging bag can be easily formed into a gusseted bag having a so-called "gusset".

In the package of the present invention, the thermoplastic resin layer forms the inner surface of the packaging bag. The thermoplastic resin layer may form part of the inner surface of the packaging bag, but preferably forms the entire inner surface.

The sanitary paper used in the present invention has high porosity due to excellent water absorption and oil absorption, and is relatively prone to fluffing. For this reason, when a paper packaging bag comes into contact with the sanitary paper, the sanitary paper tends to get caught on the packaging bag, making the packaging process difficult. However, since the inner surface of the packaging bag of the present invention is formed of a thermoplastic resin layer, and the surface of the thermoplastic resin layer is smoother than paper, the sanitary paper is prevented from being caught on the packaging bag, and the sanitary paper packaging work can be easily performed.

The thickness of the thermoplastic resin layer is not particularly limited, but can be, for example, 10 μm to 30 μm.

The thickness of the thermoplastic resin layer is preferably 10 µm or more, more preferably 11 µm or more, and even more preferably 12 µm or more. On the other hand, the thickness of the thermoplastic resin layer is preferably 25 μm or less, more preferably 20 μm or less, and even more preferably 15 μm or less. That is, the thickness of the thermoplastic resin layer is preferably 10 μm to 25 μm, more preferably 11 to 20 μm, even more preferably 12 to 15 μm.

When a plurality of thermoplastic resin layers are present, the total thickness of the thermoplastic resin layers is preferably 20 µm or more, more preferably 22 µm or more, and even more preferably 24 µm or more. On the other hand, the total thickness of the thermoplastic resin layers is preferably 50 µm or less, more preferably 40 µm or less, and even more preferably 30 µm or less. That is, the total thickness of the thermoplastic resin layer is preferably 20 μm to 50 μm, more preferably 22 to 40 μm, even more preferably 24 to 30 μm.

In particular, when there are two thermoplastic resin layers, the total thickness of the thermoplastic resin layers is preferably 20 µm or more, more preferably 21 µm or more, and even more preferably 22 µm or more. On the other hand, the total thickness of the thermoplastic resin layers is preferably 27 μm or less, more preferably 26 μm or less, and even more preferably 25 μm or less. That is, the total thickness of the thermoplastic resin layers is preferably 20 μm to 27 μm, more preferably 21 to 26 μm, and even more preferably 22 to 25 μm.

The thermoplastic resin layer can contain optional additives. Examples of additives include various organic fillers or inorganic fillers, tackifiers, antioxidants, antifogging agents, various organic or inorganic pigments, flame retardants, cross-linking agents, and UV inhibitors. .

(Thermoplastic resin)
The thermoplastic resin layer, which is the laminated layer of the laminated paper constituting the packaging bag of the present invention, contains at least one thermoplastic resin. A single type of thermoplastic resin may be used, or multiple types of resins may be used in combination.

The type of thermoplastic resin is not particularly limited, and examples include polyolefins such as polyethylene and polypropylene, polyesters such as polyethylene terephthalate, polyamides such as nylon, polyvinyl chloride, polyvinylidene chloride, and poly(meth)acrylate. can be used. Preferably, the thermoplastic resin layer contains polyolefin.

The polyolefin consists of at least one olefin having 2 to 10 carbon atoms. You may use together 2 or more types of olefins. Specific examples of olefins include ethylene, propylene, α-olefins, and the like.

Polyolefins include, for example, ethylene homopolymers or copolymers, propylene homopolymers or copolymers, butene homopolymers or copolymers, and the like. It may be a random copolymer or block copolymer of ethylene and propylene.

Preferably, the polyolefin is an ethylene homopolymer or copolymer. The copolymer of ethylene is preferably a copolymer of ethylene and propylene and/or an α-olefin, more preferably a copolymer of ethylene and an α-olefin. α-olefins include those having 3 to 20 carbon atoms, preferably 3 to 8 carbon atoms, and specific examples include 1-butene, 1-hexene, 4-methyl-1-pentene, 1-octene, vinylcyclohexane, and the like. Although exemplified, 1-hexene is preferred. A copolymer of ethylene and 1-hexene or a copolymer of ethylene, propylene and 1-hexene is particularly preferred as the polyolefin.

As the polyolefin, those synthesized using a metallocene catalyst are preferable, and those synthesized by a gas phase method are more preferable. Examples of those synthesized using a metallocene catalyst include kernels KF260T, KF270, KF271, KF282, KF283, KF360T, KF370, KF380, KC452T, KC570S, KC580S, KC573, KC577T, KS240T, and KS340T manufactured by Nippon Polyethylene Co., Ltd. , KS260, KS560T, KS571, KJ640T and the like. Examples of those synthesized by a gas phase method using a metallocene catalyst include Harmolex NF324A, NF375B, NF366A, NF384A, NF444A, NF464A, NC564A, NF325N, NF464N, NF444N, NH645A, NH745N manufactured by Nippon Polyethylene Co., Ltd. NH845N, NJ744N, Prime Polymer's Evolue SP0510, SP1020, SP1520, SP1510, SP2020, SP2320 and the like.

The thermoplastic resin layer of the laminated paper constituting the packaging bag of the present invention preferably contains a thermoplastic resin having a melting temperature (by DSC method) of 80° C. or higher as measured according to JIS K7121. It is more preferable that the thermoplastic resin contained in the thermoplastic resin layer consists only of a thermoplastic resin having a melting temperature (by DSC method) of 80° C. or higher as measured according to JIS K7121. It is even more preferable that the thermoplastic resin having a melting temperature of 80° C. or higher as measured by JIS K7121 is the polyolefin. The melting temperature of the thermoplastic resin measured by JIS K7121 is more preferably 85° C. or higher, even more preferably 90° C. or higher, even more preferably 95° C. or higher, and even more preferably 100° C. or higher.

When the laminated paper is provided with a thermoplastic resin layer containing a thermoplastic resin having the above specific melting temperature, the packaging bag manufactured from the laminated paper has excellent strength and suppresses tearing of the packaging bag. can do. Therefore, it is possible to maintain good packaging of the object to be packaged.

It is more preferable that the thermoplastic resin layer of the laminated paper constituting the packaging bag of the present invention contains a thermoplastic resin having a melting temperature (by DSC method) of 110° C. or higher as measured according to JIS K7121. It is even more preferable that the thermoplastic resin contained in the thermoplastic resin layer consists only of a thermoplastic resin having a melting temperature (by DSC method) of 110° C. or higher as measured according to JIS K7121. It is even more preferable that the thermoplastic resin having a melting temperature of 110° C. or higher as measured by JIS K7121 is polyolefin. Such polyolefins include, for example, Hermolex NF324A, NF375B, NF366A, NF384A, NF444A, NF464A, NC564A, NF325N, NF464N, NF444N, NH645A, NH745N, NH845N, NJ744N manufactured by Nippon Polyethylene Co., Ltd., and Evolue SP0510 manufactured by Prime Polymer Co., Ltd. , SP1020, SP1520, SP1510, SP2020, SP2320 and the like. The melting temperature of the thermoplastic resin measured by JIS K7121 is more preferably 115° C. or higher, and even more preferably 120° C. or higher. In this case, since the melting temperature of the thermoplastic resin is relatively high, the tear strength of the packaging bag can be particularly improved.

(Lubricant)
The thermoplastic resin layer forming the inner surface of the packaging bag of the present invention contains a lubricant. A single type of lubricant may be used, or multiple types of lubricants may be used in combination.

As the lubricant, any kind of inorganic, organic or inorganic/organic hybrid lubricant can be used. Organic lubricants are preferred from the viewpoint of compatibility with thermoplastic resins. Examples of organic lubricants include fatty acid amides, fatty acids, fatty acid esters, and waxes, with fatty acid amides being preferred.

Fatty acid amides include unsaturated fatty acid amides such as oleic acid amide and erucic acid amide; , as well as combinations thereof. Erucamide is preferred.

The amount of the lubricant is not particularly limited, but can be in the range of, for example, 1 to 10% by weight, based on the total weight of the thermoplastic resin composition constituting the thermoplastic resin layer, and 2 to 8% by weight. % by weight is preferred, and 3-6% by weight is even more preferred.

In the present invention, a plurality of thermoplastic resin layers may be present, and the thermoplastic resin layer forming the inner surface of the packaging bag may contain a lubricant. A plurality of thermoplastic resin layers are preferably adjacent to each other. In this case, by not forming the inner surface of the packaging bag and by not blending a lubricant into the thermoplastic resin layer in contact with the paper substrate, the adhesion between the paper substrate and the thermoplastic resin layer as a whole is improved. It is possible to avoid the influence of the lubricant, for example, it is possible to avoid the deterioration of the adhesion between the paper base and the entire thermoplastic resin layer due to the lubricant.

(others)
The laminated paper used in the present invention can comprise a layer other than the paper substrate and the thermoplastic resin, for example, an optional intermediate layer such as an adhesive layer between the paper substrate and the thermoplastic resin layer. be able to. In addition, any layer such as a protective layer and a printed layer can be provided on the surface of the paper substrate opposite to the surface on which the thermoplastic resin is present. However, in order to suppress the thickness of the laminated paper and improve the deformability of the laminated paper, the laminated paper may be composed only of the paper substrate and the thermoplastic resin layer.

In the package of the present invention, it is preferable that the paper substrate is present on the outer surface side of the packaging bag. Thereby, it can be easily recognized that the packaging bag of the present invention is made of paper.

In the packaging bag of the present invention, it is preferable that at least a part of the outer surface of the packaging bag has anti-slip properties. The type of non-slip is not particularly limited. For example, a member having a non-slip function is installed on the outer surface of the packaging bag, or unevenness having a non-slip function is formed on the outer surface of the packaging bag. can be

When a non-slip is installed on a part of the outer surface of the packaging bag, the installation position of the non-slip is not particularly limited, and it is possible to place it at any position on the outer surface of the packaging bag. , preferably around the opening. For example, when the opening portion has perforations, it is preferable to provide a plurality of non-slip pads on both sides of the perforations.

As a non-slip layer, a non-slip layer having a non-slip surface is preferable. The constituent material of the anti-slip layer is not particularly limited, and various inorganic materials and/or organic materials can be used, but organic materials are preferred, and natural resins and/or synthetic resins are more preferred. The synthetic resin is preferably a synthetic resin different from the thermoplastic resin forming the thermoplastic resin layer.

The surface shape of the anti-slip layer is not particularly limited, and may be any shape such as a circle, an ellipse, or a square. The color of the anti-slip layer is also not particularly limited, and may be white, black, various chromatic colors, or may be transparent.

The anti-slip layer is preferably a coating film, more preferably a cured varnish layer. The type of varnish is not particularly limited, and a single type of varnish may be used, or multiple types of varnish may be used together. As the varnish, for example, an organic solvent solution of resin such as urethane resin, alkyd resin and epoxy resin can be used. A cured varnish layer can be formed by partially coating the outer surface of the packaging bag with varnish and drying and curing the varnish.

When the outer surface of the packaging bag is a paper base material, at least a part of the paper base material may be impregnated with varnish and dried and cured to prevent slippage. The method of impregnation is not particularly limited, and for example, varnish may simply be applied to the outer surface of the paper substrate.

When at least a part of the outer surface of the packaging bag has a non-slip surface, for example, when the packaging bag is gripped with fingers or the like to open the opening portion, the gripping portion of the packaging bag can be made less slippery. It becomes possible, and opening work can be made easier.

(Method for producing laminated paper)
The method for producing the laminated paper used in the present invention is not particularly limited. It can be produced by a method such as integration with a paper base material using an adhesive. A method of integrating the paper substrate and the thermoplastic resin layer by extrusion lamination is preferred. That is, it is preferable that the thermoplastic resin is an extrusion coating layer.

The tensile strength (JIS P8113) of laminated paper at 23° C. and 50% relative humidity is preferably 1.1 to 1.7 kN/m, more preferably 1.2 to 1.6 kN/m, more preferably 1.3 in the MD direction. ~1.5 kN/m is even more preferred. In addition, the tensile strength of the laminated paper at 23 ° C. and 50% relative humidity is preferably 0.5 to 1.0 kN / m in the CD direction, more preferably 0.6 to 0.9 kN / m, more preferably 0.7 to 0 0.8 kN/m is even more preferred.

The tear strength (JIS P8116) of the laminated paper at 23° C. and 50% relative humidity is preferably 500 kN/m or more, more preferably 500 kN/m or more in both the MD and CD directions. When the laminated paper has a tear strength of 500 kN/m or more at 23° C. and 50% relative humidity, the packaging paper made of the laminated paper is particularly resistant to tearing, and the package of the present invention is particularly excellent in packaging stability. The tear strength of the laminated paper at 23° C. and 50% relative humidity is more preferably 530 kN/m or more in the MD direction, and even more preferably 550 kN/m or more. The tear strength of the laminated paper at 23° C. and 50% relative humidity is more preferably 560 kN/m or more in the CD direction, and even more preferably 580 kN/m or more.

The elongation (JIS P8113) of laminated paper at 23° C. and 50% relative humidity is preferably 8.0 to 13.0%, more preferably 9.0 to 12.0%, more preferably 10.0 to 11.0% in the MD direction. 0% is even more preferred. In addition, the elongation of the laminated paper at 23° C. and 50% relative humidity is preferably 3.0 to 8.0%, more preferably 4.0 to 7.0%, and 5.0 to 6.0% in the CD direction. is even more preferred.

The burst strength (JIS P8112) of laminated paper at 23° C. and 50% relative humidity is preferably 70 to 120 kPa, more preferably 80 to 110 kPa, and even more preferably 90 to 100 kPa.

[Method for manufacturing package]
The manufacturing method of the package of the present invention is not particularly limited. A package can be manufactured by sealing the part with an adhesive or the like. Moreover, since the laminated paper constituting the package of the present invention is provided with a thermoplastic resin layer, the package can be produced by sealing the bag by heat-sealing the opening of the container.

The heat sealing temperature depends on the type of thermoplastic resin contained in the thermoplastic resin layer, but is preferably 80°C to 350°C, more preferably 100°C to 300°C, and even more preferably 150°C to 250°C.

The heat sealing time also depends on the type of thermoplastic resin contained in the thermoplastic resin layer, but is preferably 5 seconds or less, more preferably 3 seconds or less, and even more preferably 1 second or less.

[Package example]
FIG. 1 is a view showing one embodiment of the package of the present invention, and FIGS. 1(A) and 1(B) respectively show the front side and back side of one embodiment of the package of the present invention. . FIG. 1(C) is a cross-sectional view taken along line AA in FIG. 1(A).

In FIG. 1, 1 represents a package, 2 is a packaging bag of the package, and 3 is sanitary paper contained in a container within the packaging bag 2. As shown in FIG. In the embodiment shown in FIG. 1, the packaging bag 2 is made of laminated paper with a paper substrate and a thermoplastic resin layer. In the embodiment shown in FIG. 1, the packaging bag 2 is formed by heat-sealing a part (end portion) of the laminated paper, and the sanitary paper 3 is packaged.

A plurality of air holes 4 are formed in the packaging bag 2 so that the air inside the packaging bag 2 can be discharged to the outside. By discharging the air inside the packaging bag 2 to the outside through the air holes 4, the volume of the packaging bag 2 can be reduced, and the packaging and transportation of the packaging bag 2 can be facilitated, for example.

In the embodiment shown in FIG. 1, a perforation 2-1 capable of forming an outlet for taking out the sanitary paper 3 is formed on a part of the surface of the packaging bag 2 as an unsealing portion. An outlet is formed by breaking the stitch 2-1, and the sanitary paper 3 can be taken out from the outlet.

In the embodiment shown in FIG. 1, the sanitary paper 3 is stored in the packaging bag 2 in a so-called pop-up manner. Therefore, when one sanitary paper 3 is taken out from the take-out port, part of the next sanitary paper 3 can protrude from the take-out port, and the sanitary paper 3 can be easily taken out.

FIG. 2 is an enlarged cross-sectional view of one embodiment of a laminated paper showing an embodiment in which the laminated paper comprises a single thermoplastic layer containing a lubricant.

In the embodiment of FIG. 2, the laminated paper 5 includes a paper substrate 5-1 and a single thermoplastic resin layer 5-2 present on one surface of the paper substrate 5-1, and the thermoplastic resin layer 5-2 is an extrusion coating layer formed by extrusion lamination on the surface of the paper substrate 5-1. The thermoplastic resin layer 5-2 contains a lubricant.

The laminated paper 5 shown in FIG. 2(A) consists of only a paper substrate 5-1 and a thermoplastic resin layer 5-2, the thermoplastic resin layer 5-2 forming the inner surface, and the sanitary paper 3 side shown in FIG. , and the paper substrate 5-1 forms the outer surface.

When using the laminated paper 5 shown in FIG. 2 as the packaging bag 2 in FIG. Breakage of the bag 2 can be suppressed.

In the above case, since the thermoplastic resin layer 5-2 shown in FIG. It does not come into contact with the substrate 5-1. This can prevent the sanitary paper 3 from being caught on the packaging bag 2 . Therefore, the packaging body 1 can maintain the packaging of the sanitary paper 3 well, and the packaging is easy.

In the embodiment of FIG. 2, since the thermoplastic resin layer 5-2 contains a lubricant, the thermoplastic resin layer 5-2 is not shown in the figure due to an external force from a finger or the like when the packaging bag is opened. Even if it is strongly pressed against the sanitary paper, the friction between the thermoplastic resin layer 5-2 and the sanitary paper can be suppressed, and the laminated paper 5 can easily move on the sanitary paper. Therefore, it is easy to open the package.

Furthermore, in the embodiment of FIG. 2(B), a transparent anti-slip layer 6 made of a cured varnish layer is formed on the surface of the paper substrate 5-1 opposite to the surface in contact with the thermoplastic resin layer 5-2. As shown in FIG. 4, the anti-slip layer 6 is provided on both sides of the perforations 2-1. Therefore, when the laminated paper 5 shown in FIG. 2(B) is used for the packaging bag 2 shown in FIG. When unfolding and cutting the perforations 2-1 to open the package, it is possible to make the gripping portion of the packaging bag 2 less slippery, thereby further facilitating the opening operation.

In the embodiment shown in FIG. 2(B), the anti-slip layer 6 is directly formed on the surface of the paper substrate 5-1. Additionally, other layers such as protective layers, printing layers, etc. may be present. Further, the other layer may be present not only between the paper substrate 5-1 and the anti-slip layer 6, but also at any position on the surface of the paper substrate 5-1.

FIG. 3 is an enlarged cross-sectional view of another aspect of laminated paper, showing an aspect in which the laminated paper has a plurality of thermoplastic resin layers, and the thermoplastic resin layer forming the inner surface of the packaging bag contains a lubricant.

In the embodiment of FIG. 3, the laminated paper 5 includes a paper substrate 5-1 and a first thermoplastic resin layer 5-2 and a second thermoplastic resin layer 5 present on one surface of the paper substrate 5-1. -3, and the first thermoplastic resin layer 5-2 and the second thermoplastic resin layer 5-3 are extrusion-laminated on the surface of the paper substrate 5-1. coating layer. The first thermoplastic resin layer 5-2 and the second thermoplastic resin layer 5-3 are adjacent.

In the embodiment of FIG. 3, the first thermoplastic resin layer 5-2 does not contain lubricant. On the other hand, the second thermoplastic resin layer 5-3 forming the inner surface of the packaging bag contains a lubricant.

The laminated paper 5 shown in FIG. 3(A) consists of only a paper substrate 5-1, a first thermoplastic resin layer 5-2 and a second thermoplastic resin layer 5-3, and the second thermoplastic resin layer 5-3 forms the inner surface and faces the sanitary paper 3 side shown in FIG. 1, and the paper substrate 5-1 forms the outer surface.

When using the laminated paper 5 shown in FIG. 3 as the packaging bag 2 in FIG. Breakage of the bag 2 can be suppressed.

In the above case, since the second thermoplastic resin layer 5-3 shown in FIG. It contacts the surface and does not contact the paper substrate 5-1. As a result, it is possible to prevent the sanitary paper 3 from being caught on the packaging bag 2 . Therefore, the packaging body 1 can maintain the packaging of the sanitary paper 3 well, and the packaging is easy.

In the embodiment of FIG. 3, since the second thermoplastic resin layer 5-3 contains a lubricant, when the packaging bag is opened, the second thermoplastic resin layer 5-3 is not affected by an external force from a finger or the like. Even if 3 is strongly pressed against the sanitary paper (not shown), the friction between the second thermoplastic resin layer 5-3 and the sanitary paper can be suppressed, and the laminated paper 5 can easily move on the sanitary paper. Therefore, it is easy to open the package.

In addition, in the embodiment of FIG. 3, since the first thermoplastic resin layer 5-2 does not contain a lubricant, the adhesiveness between the paper base material 5-1 and the first thermoplastic resin layer 5-2 is maintained satisfactorily. can do. Although there is a possibility that part of the lubricant in the second thermoplastic resin layer 5-3 migrates to the first thermoplastic resin layer 5-2, the first thermoplastic resin layer 5-2 Since it contains no lubricant, the influence of the lubricant in the second thermoplastic resin layer 5-3 on the adhesiveness between the paper substrate 5-1 and the first thermoplastic resin layer 5-2 is reduced. Therefore, in the embodiment of FIG. 3, even if part of the lubricant in the second thermoplastic resin layer 5-3 migrates to the first thermoplastic resin layer 5-2, the lubricant prevents the paper substrate 5- 1 and the first thermoplastic resin layer 5-2 can be suppressed, and the first thermoplastic resin layer 5-2 and the second thermoplastic resin layer for the paper substrate 5-1 A good bond of 5-3 can be maintained.

Furthermore, in the embodiment of FIG. 3(B), a transparent anti-slip layer 6 made of a cured varnish layer is formed on the surface of the paper substrate 5-1 opposite to the surface in contact with the first thermoplastic resin layer 5-2. are formed, and as shown in FIG. 4, the anti-slip layer 6 is provided on both sides of the perforations 2-1. Therefore, when the laminated paper 5 shown in FIG. 3B is used for the packaging bag 2 shown in FIG. When unfolding and cutting the perforations 2-1 to open the package, it is possible to make the gripping portion of the packaging bag 2 less slippery, thereby further facilitating the opening operation.

In the embodiment shown in FIG. 3(B), the anti-slip layer 6 is directly formed on the surface of the paper substrate 5-1. Additionally, other layers such as protective layers, printing layers, etc. may be present. Further, the other layer may be present not only between the paper substrate 5-1 and the anti-slip layer 6, but also at any position on the surface of the paper substrate 5-1.

Since the present invention uses a laminated paper packaging bag composed of a paper base material and a thermoplastic resin layer, the sanitary paper is less likely to get caught in the packaging bag compared to the case of using a packaging bag composed only of a paper base material. be.

In addition, in the package of the present invention, since the thermoplastic resin layer forming the inner surface of the packaging bag contains a lubricant, the thermoplasticity of the laminated paper is reduced by an external force from a finger or the like when the packaging bag is opened. Even if the resin layer is strongly pressed against the sanitary paper, the friction between the thermoplastic resin layer and the sanitary paper can be suppressed, and the laminated paper can easily move on the sanitary paper.

Therefore, the present invention is suitable for packaging sanitary paper.

1 package 2 packaging bag 3 sanitary paper 4 air hole 5 laminated paper 5-1 paper substrate 5-2 (first) thermoplastic resin layer 5-3 (second) thermoplastic resin layer 6 anti-slip layer

Claims (20)

sanitary paper, and
A packaging body comprising a packaging bag containing the sanitary paper,
The sanitary paper is planar and is folded and accommodated in the packaging bag,
The packaging bag is made of laminated paper having a paper base material and a thermoplastic resin layer,
The laminated paper has an opening portion,
A package, wherein the thermoplastic resin layer forms an inner surface of the packaging bag and contains a lubricant. 2. The package according to claim 1, wherein said opening portion has perforations. The package according to claim 1 or 2, wherein said paper substrate has a basis weight of 10 g/m ² to 90 g/m ² . 4. The package according to any one of claims 1 to 3, wherein said paper substrate is crepe paper. The package according to any one of claims 1 to 4, wherein the thermoplastic resin layer has a thickness of 10 µm to 30 µm. The laminated paper comprises a plurality of thermoplastic resin layers,
The package according to any one of claims 1 to 5, wherein the thermoplastic resin layer forming the inner surface of the packaging bag contains the lubricant. The package according to any one of claims 1 to 6, wherein the laminated paper has a thickness of 30 µm to 200 µm. The package according to any one of claims 1 to 7, wherein said thermoplastic resin layer contains polyolefin. 9. The package of claim 8, wherein said polyolefin is an ethylene homopolymer or copolymer. 10. The package according to claim 9, wherein said copolymer of ethylene is a copolymer of ethylene with propylene and/or alpha olefins. The package according to any one of claims 1 to 10, wherein the thermoplastic resin layer contains a thermoplastic resin having a melting temperature of 80°C or higher as measured by JIS K7121. 12. The package according to any one of claims 1 to 11, wherein said lubricant is a fatty acid amide. 13. The package according to any one of claims 1 to 12, wherein said thermoplastic resin layer is an extrusion coating layer. 14. The package according to any one of claims 1 to 13, wherein the paper substrate is present on the outer surface side of the packaging bag. 15. The package according to claim 14, wherein at least a portion of the outer surface of said packaging bag is non-slip. 16. The package of claim 15, wherein said non-slip is a varnish hardened layer. 17. The package according to any one of claims 1 to 16, wherein said packaging bag is heat-sealed. 18. Package according to any of the preceding claims, wherein the packaging bag comprises at least one air hole. 19. The package according to any one of claims 1 to 18, wherein the sanitary paper is housed in the packaging bag in a pop-up manner. 20. The package according to any one of claims 1 to 19, wherein said sanitary paper is a paper towel.

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