JP2022057523A - Paper product package - Google Patents

Abstract

To provide a paper product package packing a paper product by a packing base material including a paper base material and capable of suppressing unintended cutting by facilitating perforation opening, easily opening the perforation from a specific direction or place, and easily forming a take-out port.SOLUTION: This paper product package is configured such that one or more paper products are covered as a whole by a packing base material including at least a paper base material, and the packing base material has a perforation for forming a paper product take-out port. The basis weight of the packing base material is 35 g/m2-105 g/m2. The perforation is roughly rectangular and provided so that two sides in a longitudinal direction can be roughly parallel in a MD direction on the surface of the packing base material covering the upper parts of the paper products. The bonding ratio of the perforation in a direction roughly parallel to the MD direction is 6%-30%. The bonding ratio of the perforation in a direction roughly parallel to a CD direction is 4%-26%.SELECTED DRAWING: Figure 1

Description

The present invention relates to a paper product packaging body suitable for packaging paper products, particularly paper products such as tissue paper.

Conventionally, a package for accommodating roll-shaped paper products such as toilet paper and kitchen paper and laminated paper products such as tissue paper and wiper as objects to be packaged has been known.

As a packaging body for packaging roll-shaped paper products, for example, in Patent Document 1, a gusset (gusset) is symmetrically folded into a tubular film such as polyethylene to form a main body, and the upper portion thereof is folded flat to form a grip portion. Is disclosed.

On the other hand, as a wrapping body for wrapping laminated paper products, a paper carton made of paperboard having a high basis weight is generally used. Further, as a package alternative to a paper carton, for example, Patent Document 2 discloses a film package having a perforation in the center of the upper surface of a package bag made of a flexible resin film. There is.

Japanese Unexamined Patent Publication No. 2004-269010 Japanese Unexamined Patent Publication No. 2016-188092

However, there has been a demand for a new package having the above-mentioned paper products, particularly paper products such as tissue paper, as the object to be packaged. In particular, it is desired to reduce the use of plastic (synthetic resin) due to the growing awareness of environmental problems in recent years.
In addition, the film that wraps paper products such as tissue paper is provided with a single perforation to form a paper product take-out port so that it can be opened. When a paper product is wrapped with a material and a perforation for an outlet is provided, it may be difficult to open the package because it is different from the film packaging. Therefore, if the joints of the perforations are shortened, it becomes easier to open the package, but on the other hand, the perforations may be unintentionally (easily) cut, resulting in a defective product.

Furthermore, if the take-out port is not a single line but a substantially rectangular shape or a substantially circular shape, it is not possible to know from which part the perforation should be opened when opening the perforation, and the product is accidentally opened from a difficult-to-open location. The packaging base material other than the perforated part may be torn during the process.

The present invention has been made in view of such circumstances, and an object thereof is to unintentionally cut a paper product package packaged with a packaging substrate including a paper substrate because the perforations are easy to open. It is an object of the present invention to provide a paper product package in which the perforations can be easily opened from a specific direction or location and a take-out port can be easily formed.

In view of the above problems, the inventors of the present invention have conducted diligent research. As a result, among the perforations provided in the substantially rectangular shape, a predetermined bond ratio is provided for each of the two sides substantially parallel to the MD direction and the two sides substantially parallel to the CD direction, and the basis weight of the packaging base material is further specified. By doing so, in the packaging of the paper product packaged with the packaging base material including the paper base material, the perforations can be easily opened to suppress unintended cutting, and the perforations can be easily opened from a specific direction or place. It has been found that the paper product packaging body can easily form an outlet and can solve the above problems, and the present invention has been completed.
Specifically, the present invention provides the following.

(1) The first aspect of the present invention is a packaging base material containing at least a paper base material, wherein the entire one or more paper products are covered, and the paper products are sealed by at least one sealing portion. The packaging base material is a package having perforations for forming an outlet for the paper product, the paper product is a laminated thin leaf paper, and the basis weight of the packaging base material is 35 g / m ² . The perforation is 105 g / m ² or less, and the perforation is a substantially rectangular surface on the surface of the packaging base material that covers the upper part of the paper product, and two sides of the substantially rectangular shape in the longitudinal direction are the packaging base. It is provided so as to be substantially parallel to the material production line direction (MD direction), and the bond ratio of the perforations in the direction substantially parallel to the MD direction is 6% or more and 30% or less, and the perforations. The packaging for paper products is characterized in that the bond ratio in a direction substantially parallel to the direction orthogonal to the MD direction (CD direction) is 4% or more and 26% or less.
(2) The second aspect of the present invention is the packaging for paper products according to (1), wherein the density of the packaging base material is 0.6 g / cm ³ or more and 0.95 g / cm ³ or less. It is characterized by being.
(3) The third aspect of the present invention is the package for paper products according to (1) or (2), wherein the tear strength of the packaging base material in the MD direction is 350 mN or more and 1400 mN or less. It is characterized by that.
(4) The fourth aspect of the present invention is the package for paper products according to any one of (1) to (3), wherein the tear strength of the packaging base material in the CD direction is 600 mN or more and 2000 mN. It is characterized by the following.
(5) A fifth aspect of the present invention is the package for paper products according to any one of (1) to (4), wherein one of the perforations is substantially parallel to the MD direction. It is characterized in that the bond ratio at 30% or more and 70% or less of the total length of the one side is 3% or more and 20% or less.
(6) The sixth aspect of the present invention is the packaging body for paper products according to any one of (1) to (5), wherein the packaging base material further contains a sealing layer. It is a thing.
(7) A seventh aspect of the present invention is the package for paper products according to (6), wherein the seal layer is a heat seal layer and / or an adhesive layer. be.
(8) The eighth aspect of the present invention is the packaging for paper products according to (7), wherein the heat-sealing layer contains a polyolefin-based resin.
(9) A ninth aspect of the present invention is the packaging for paper products according to any one of (1) to (8), wherein the packaging is caramel packaging, gusset packaging, or pillow packaging. It is characterized by.

According to the present invention, in a package of a paper product packaged with a packaging substrate including a paper substrate, the perforations are easy to open, unintended cutting can be suppressed, and the perforations are from a specific direction or location. It is possible to provide a paper product package that is easy to open and easily forms an outlet.

It is a perspective view which shows an example of the packaging body for a paper product and a paper product of this invention. It is a top view of the perforated part of the package for paper products of this invention. It is a perspective view which shows the process of opening the perforation of the package for a paper product of this invention, and taking out a paper product from a formed outlet. It is a perspective view which shows an example of the paper product to be packaged in the package for a paper product of this invention.

Hereinafter, embodiments for carrying out the present invention (hereinafter referred to as embodiments) will be described in detail with reference to the drawings, but these are listed for the purpose of illustration and do not limit the present invention. ..

1. 1. Packaging for Paper Products FIG. 1 is a perspective view showing an example of the packaging for paper products of the present invention (hereinafter, also simply referred to as “packaging”) and paper products. In the packaging body 1 of the present invention, the entire paper product (object to be packaged) 11 is covered with the packaging base material 10, and the paper product 11 is sealed by at least one sealing portion 12. When the package 1 is a gusset package or a pillow package, which will be described later, the seal portion 12 is preferably provided at an overlapping end portion of the packaging base material 10. At this time, as shown in FIG. 1, it is preferable that the seal portions 12 are formed so as to be substantially straight on both ends of the package 1 and the seal portions 12 are substantially parallel to each other, but the package 1 is sealed. As long as the property (adhesiveness of the sealing portion 12) can be ensured, it may be formed in a place other than this.

In addition, three or more sealing portions 12 may be provided. For example, in addition to the sealing portions 12 at both ends of the package 1 shown in FIG. 1, substantially central portions of each of the sealing portions 12 are connected and The seal portion may be further formed so as to be orthogonal to any of the seal portions 12 (not shown). Further, in the package 1, the packaging base material 10 may cover a part of the paper product 11 instead of the whole, and the paper product 11 may not be sealed (not shown).

Further, the length in the direction orthogonal to the longitudinal direction (width direction) of the seal portion 12 is preferably 2 mm or more and 35 mm or less, more preferably 4 mm or more and 24 mm or less, and 6 mm or more and 13 mm or less. More preferred. The sealing portion 12 does not have to be completely sealed to the end portion, and may be sealed, for example, with the packaging base material 10 left a few mm in the width direction toward the end portion side.

Further, the package 1 includes an outlet 14 for taking out the paper product 11. The take-out port 14 has a perforation 13 for forming the take-out port 14 of the paper product 11 in the packaging base material 10, and is formed by cutting and opening the perforation 13 at the time of use. As shown in FIG. 3, the required number of paper products 11 can be obtained by sequentially pulling out (taking out) the paper products 11 from the formed take-out port 14.
As shown in FIGS. 1 and 2, the perforations 13 are substantially rectangular on the surface of the packaging base material 10 that covers the upper part of the paper product 11, and two sides of the substantially rectangular shape in the longitudinal direction are packaging bases described later. The material 10 is provided so as to be substantially parallel to the production line direction (MD direction). At this time, it is preferable that the central portion of the region surrounded by the perforation 13 is provided so as to be arranged on the central portion of the paper product 11. The total length of the perforation 13 is preferably 70 mm or more and 450 mm or less, more preferably 110 mm or more and 350 mm or less, and further preferably 150 mm or more and 250 mm or less.
It is preferable that all four sides of the perforation 13 are substantially straight lines, but as shown in FIG. 2, changes such as making only two sides substantially parallel to the direction orthogonal to the MD direction (CD direction) into an arc shape. You may add.

At this time, the length of the connection and the length of the cut line of the perforations 131 on the sides substantially parallel to the MD direction and the perforations 132 on the sides substantially parallel to the CD direction are different from each other. Specifically, the length of the joint of the perforations 131 on the sides substantially parallel to the MD direction is preferably 0.3 mm or more and 2.0 mm or less, and more preferably 0.5 mm or more and 1.3 mm or less. It is preferably 0.7 mm or more and 1.1 mm or less, more preferably. The length of the cut line of the perforation 131 on the side substantially parallel to the MD direction is preferably 1.0 mm or more and 8.0 mm or less, and more preferably 2.0 mm or more and 7.0 mm or less. It is more preferably 0.0 mm or more and 6.0 mm or less.
Further, the length of the joint of the perforations 132 on the sides substantially parallel to the CD direction is preferably 0.2 mm or more and 1.8 mm or less, more preferably 0.3 mm or more and 1.2 mm or less, and 0. It is more preferably 1.6 mm or more and 1.0 mm or less. The length of the cut line of the perforation 132 on the side substantially parallel to the CD direction is preferably 2.0 mm or more and 11.0 mm or less, and more preferably 3.0 mm or more and 9.0 mm or less. It is more preferably 0.0 mm or more and 7.0 mm or less.
The respective values of the connecting length and the cutting line length are calculated from the average of the connecting length and the cutting line length of the entire perforation 13 on each side. Further, the length of the connection and the length of the cut line of the entire perforation 13 on each side are measured by using an optical microscope.

Then, assuming that the length of the connection of the perforations 131 is A and the length of the cut line of the perforations 131 is B, the bond ratio of the perforations 131 is (A / (A + B) × 100) (%). Demanded by. The bond ratio of the perforations 131 on the sides substantially parallel to the MD direction is 6% or more and 30% or less, preferably 9% or more and 25% or less, and more preferably 12% or more and 19% or less. Similarly, assuming that the length of the connection of the perforations 132 is C and the length of the cut line of the perforations 132 is D, the bond ratio (C / (C + D) × 100) (%) of the perforations 132 is 4. % Or more and 26% or less, preferably 7% or more and 21% or less, and more preferably 10% or more and 16% or less. If the bond ratio of the perforation 131 is less than 6%, or the bond ratio of the perforation 132 is less than 4%, the perforation 13 is likely to be cut, and the perforation 13 is unintentionally cut except at the time of opening. If the bond rate of the perforation 131 exceeds 30% or the bond rate of the perforation 132 exceeds 26%, the perforation 13 becomes difficult to cut and the take-out port 14 becomes difficult to form. By setting the bond ratios of the perforations 131 and the perforations 132 within the above numerical ranges, it is possible to obtain the package 1 having the perforations 13 which is easy to open and can suppress unintended cutting. Further, by setting the bond ratio of the perforation 131 of the side substantially parallel to the MD direction and the bond ratio of the perforation 132 of the side substantially parallel to the CD direction to different values, the perforation is made from a specific direction (MD direction). It is possible to obtain a package 1 that is easy to open the 13.

The length of the connection of the perforations 13 and the length of the cut line do not have to be uniform as a whole, and the corresponding portion can be easily opened from a part (for example, one side substantially parallel to the MD direction). Only each length (and bond rate) may be varied.
Specifically, in the perforation 131 on one side, the joint length at 30% or more and 70% or less of the total length of one side is preferably 0.2 mm or more and 1.9 mm or less, preferably 0.3 mm or more. It is more preferably 1.2 mm or less, and further preferably 0.6 mm or more and 1.0 mm or less. Further, in the perforation 131 on one side, the length of the cut line in 30% or more and 70% or less of the total length of one side is preferably 2.0 mm or more and 14.0 mm or less, preferably 4.0 mm or more. It is more preferably 12.0 mm or less, and further preferably 6.0 mm or more and 10.0 mm or less. Then, assuming that the length of the connection is E and the length of the cut line is F, the bond ratio (E / (E + F) at the perforation 131 on one side is 30% or more and 70% or less of the total length of one side. ) × 100) (%) is preferably 3% or more and 20% or less, more preferably 5% or more and 16% or less, and further preferably 7% or more and 12% or less. In the perforation 131, by setting the bond ratio at 30% or more and 70% or less of the total length of one side within the above numerical range, it is possible to obtain a package 1 in which the perforation 13 can be easily opened from a specific location. can.

Further, although both sides substantially parallel to the MD direction are provided with perforations 131, it is possible to accommodate consumers who want to leave the packaging base material 10 inside the perforations 13 as a lid without cutting off all of them. It is not necessary to provide perforations on only one side in the longitudinal direction (not shown). In that case, a crease may be made in advance on the portion corresponding to one side not provided so that the lid portion can be easily fixed when the paper product 11 is taken out (not shown).

2. 2. Packaging base material The packaging base material 10 contains at least a paper base material, but preferably includes a sealing layer. When the paper base material is formed as the package 1, the outer surface side may be printed. Further, the paper base material may be an overcoated paper that has been overcoated to ensure waterproofness.

The basis weight of the packaging base material 10 (for example, the total basis weight of the paper base material and the sealing layer) shall be 35 g / m ² or more and 105 g / m ² or less, and 40 g / m ² or more and 85 g / m ² or less. Is preferable, and more preferably 50 g / m ² or more and 75 g / m ² or less. If the basis weight of the packaging base material 10 is less than 35 g / m ² , the perforations 13 are likely to be cut, and the perforations 13 are unintentionally cut at times other than when the package is opened. If the basis weight of the packaging base material 10 exceeds 105 g / m ² , it becomes difficult to cut the perforations 13 and it becomes difficult to form the take-out port 14. By setting the basis weight of the packaging base material 10 within the above numerical range, it is possible to obtain a package 1 having perforations 13 that is easy to open and can suppress unintended cutting.

Further, the value obtained by multiplying the bond ratio of the perforations 131 on the sides substantially parallel to the MD direction by the basis weight of the packaging base material 10 (bond ratio of the perforations 131 x the basis weight of the packaging base material 10) is 400 or more and 2000 or less. It is more preferably 600 or more and 1600 or less, and further preferably 800 or more and 1300 or less. The value obtained by multiplying the bond ratio of the perforations 132 on the sides substantially parallel to the CD direction by the basis weight of the packaging base material 10 (bond ratio of the perforations 132 x the basis weight of the packaging base material 10) is 250 or more and 1700 or less. It is more preferable, it is more preferably 400 or more and 1400 or less, and further preferably 600 or more and 1100 or less. If the bond ratio of the perforation 131 × the basis weight of the packaging base material 10 is less than 400, or the bond ratio of the perforation 132 × the basis weight of the packaging base material 10 is less than 250, the perforation 13 is likely to be cut. , It cuts unintentionally except when opening. If the bond ratio of the perforation 131 × the basis weight of the packaging base material 10 exceeds 2000, or the bond ratio of the perforation 132 × the basis weight of the packaging base material 10 exceeds 1700, the perforation 13 becomes difficult to cut and is taken out. It becomes difficult to form the mouth 14. By setting the bond ratio of the perforation 131 or the perforation 132 × the basis weight of the packaging base material 10 within the above numerical range, the package has the perforation 13 which is easy to open and can suppress unintended cutting. Body 1 can be obtained.

Further, in the perforation 131 on one side substantially parallel to the MD direction, the value obtained by multiplying the bond ratio at 30% or more and 70% or less of the total length of one side by the basis weight of the packaging base material 10 (one of the perforations 131). The bond ratio of the portion × the basis weight of the packaging base material 10) is preferably 200 or more and 1300 or less, more preferably 300 or more and 1100 or less, and further preferably 450 or more and 900 or less. In the perforation 131, the perforation 13 is opened from a specific location by setting the bond ratio × the basis weight of the packaging base material 10 at 30% or more and 70% or less of the total length of one side within the above numerical range. An easy package 1 can be obtained.

(1) Paper base material The paper base material is manufactured using wood pulp as a main raw material. The pulp here includes coniferous kraft pulp, broadleaf kraft pulp, crushed wood pulp, thermomechanical pulp, chemithermomechanical pulp, newspapers, leaflets, redesigned magazines, coated magazines, heat-sensitive recording paper, pressure-sensitive recording paper, and imitation. Conventionally known pulp such as paper, high-quality colored paper, copy paper, computer output paper, or used paper pulp such as mixed used paper thereof can be used alone or mixed at an arbitrary mixing ratio. ..

In the paper base material of the package 1 of the present invention, the pulp content is preferably 50 to 100% by weight of softwood kraft pulp, 0 to 50% by weight of broadleaf kraft pulp, and 70 to 100% by weight of softwood kraft pulp. It is more preferably 0 to 30% by weight of broad-leaved kraft pulp, and even more preferably 90 to 100% by weight of softwood kraft pulp and 0 to 10% by weight of broad-leaved kraft pulp. By setting the pulp content as described above, it is possible to obtain a package 1 having a perforation 13 that is easy to open and can suppress unintended cutting. The unbleached pulp content is preferably 30 to 100% by weight, more preferably 50 to 100% by weight, and even more preferably 70 to 100% by weight.

A material other than pulp fiber may be blended in the pulp slurry as an auxiliary material. In the package 1, the content ratio of the pulp fiber is usually preferably 70% by weight or more and 100% by weight or less, more preferably 80% by weight or more and 100% by weight or less, and 90% by weight or more and 100% by weight or less. The following is more preferable. By setting the pulp content as described above, it is possible to obtain a package 1 having a perforation 13 that is easy to open and can suppress unintended cutting. In addition, the strength of the packaging base material 10 becomes appropriate, and packaging becomes easy.

The cooking method and the bleaching method in pulp production are not particularly limited.

Further, on the paper substrate, various commonly used additives such as a wet paper strength improver, a filler, a sizing agent, a dry paper strength enhancer, a yield improver, a coloring pigment and the like are used as needed. May be added in an appropriate amount as appropriate.

The wet paper strength improving agent can be selected and used from known commonly used agents. For example, it is preferable to select from polyamide / polyamine-based resin, polyacrylamide-based resin, melamine-based resin and the like. The content of such a wet paper strength improving agent (mass in an absolutely dry state) is usually 0.01% by weight or more of the wet paper strength improving agent with respect to the pulp (mass in an absolutely dry state). It is 7% by weight or less, preferably 0.02% by weight or more and 0.5% by weight or less, and more preferably 0.03% by weight or more and 0.3% by weight or less. Even if the content of the wetting paper strength improving agent exceeds 0.7% by weight, it becomes difficult to obtain an effect commensurate with the content, resulting in an increase in cost and a decrease in dissociability, so that the packaging of the present invention is packaged. It may be difficult to reuse the body 1 later. Further, if the content of the wet paper strength improving agent is less than 0.01% by weight, it becomes difficult to obtain sufficient wet paper strength, and the package may be easily torn when wet with water and the function as a package may be inferior.

In the packaging body 1 of the present invention, these raw materials can be machined by a normal papermaking process to obtain a paper substrate of the packaging substrate 10.

The basis weight of the paper base material of the packaging base material 10 is preferably 25 g / m ² or more and 88 g / m ² or less, more preferably 30 g / m ² or more and 72 g / m ² or less, and 40 g / m ² or less. It is more preferably 56 g / m ² or less. When the basis weight of the paper base material is within the above range, it is possible to obtain a package 1 having perforations 13 that are easy to open and can suppress unintended cutting. Further, it becomes easy to achieve all of the required flexibility, softness, and strength of the packaging base material 10 while suppressing the amount of the paper base material used.

The basis weight of the paper substrate can be obtained, for example, as follows when the seal layer is a heat seal layer described later.
First, a 0.1 M aqueous acetic acid solution and a 0.1 M aqueous sodium acetate solution are prepared. About 830 g of a 0.1 M acetic acid aqueous solution and about 160 g of a 0.1 M sodium acetate aqueous solution are mixed so that the pH becomes 4, and this is used as an acetate buffer. Cellulase Onozuka p1500 (manufactured by Yakult Pharmaceutical Co., Ltd.) is added to this acetate buffer so that the addition amount is 1% by weight.
50 ml of an acetate buffer solution to which Cellulase Onozuka p1500 is added and 0.5 g of a packaging base material 10 (paper base material on which a heat seal layer is formed) are placed in a vial and tightly covered. Next, after shaking at 180 rpm and 40 ° C. for 24 hours, the heat-sealed layer is collected from the vial and the mass of the heat-sealed layer portion is measured. From the mass (0.5 g) of the packaging base material 10 (paper base material on which the heat seal layer is formed) and the mass of the collected heat seal layer, the basis weight of the paper base material is calculated by the following formula.
Basis weight of paper base material =
Basis weight of packaging base material 10 × [(mass of packaging base material 10-mass of heat seal layer) / mass of packaging base material 10]

The ratio of the basis weight of the paper base material to the basis weight of the packaging base material 10 (for example, the total basis weight of the paper base material and the sealing layer) may be 51% or more and 100% or less, but is usually 60% or more. It is more preferably 95% or less, and further preferably 70% or more and 90% or less. By setting the content within the above range, it is possible to obtain a package 1 having a perforation 13 that is easy to open and can suppress unintended cutting. Further, the ease of packaging for the soft paper product 11 can be ensured, and further, good heat sealability or adhesiveness can be ensured.

(2) Seal layer In the package 1 of the present invention, the packaging base material 10 preferably contains a seal layer in addition to the paper base material, but the seal layer may be a heat seal layer and / or an adhesive layer. preferable. The packaging base material 10 of the present invention is, for example, a paper base material / heat seal layer, a paper base material / adhesive layer, a paper base material / heat seal layer / adhesive layer, a paper base material / adhesive layer / heat seal layer. It is possible to take a layered structure such as.
Although the seal layer is provided on the paper base material as described later, it is provided inside the paper base material (for example, when the paper base material is made, the raw material of the seal layer is also made together to make the seal layer. A method (to obtain a packaging base material 10 having a sealing property including a raw material) may be used.

(2-1) Heat-seal layer In the package 1 of the present invention, even if the heat-seal layer is formed on the entire surface of the paper base material, a part of the surface, for example, the paper base materials are laminated and bonded to each other. It may be formed only in a portion. The position, size, and proportion of the heat seal layer forming the heat seal layer on the surface of the paper substrate can be appropriately set.

The material constituting the heat seal layer is not particularly limited, and any material exhibiting various heat seal properties can be used. For example, a polyolefin resin, another thermoplastic resin, or the like can be used. .. Among these, it is preferable to use a polyolefin resin. Examples of such materials include low-density polyethylene, linear low-density polyethylene, high-density polyethylene, ethylene-α / olefin copolymer, ethylene-vinyl acetate copolymer, ethylene-acrylic acid copolymer, and ethylene. -Ethyl acrylate copolymer, ethylene-methyl acrylate copolymer, ethylene-methacrylic acid copolymer, ionomer, amorphous polyester, polypropylene, styrene-acrylic copolymer, propylene-ethylene copolymer (preferably) Copolymers with an ethylene content of 10 mol% or less), or polypropylene-based resins obtained by graft-polymerizing or copolymerizing unsaturated carboxylic acids, unsaturated carboxylic acid anhydrides, ester monomers, etc. with polypropylene, medium-density polyethylene, etc. Can be used. As the material constituting the heat seal layer, any one type may be used alone, or two or more types may be used in combination.

The heat seal layer is a commonly used method, for example, a method of forming a film of a thermoplastic resin such as a polyolefin resin or a composition containing a thermoplastic resin on a paper substrate by an extrusion method, a known heat seal processing apparatus ( A method of attaching a film made of a thermoplastic resin or containing a thermoplastic resin to a paper substrate using a laminating treatment device), a thermoplastic resin or a thermoplastic resin composition dissolved or dispersed in water. A water-based heat sealant or a solvent-based heat sealant obtained by dissolving or dispersing a thermoplastic resin or a thermoplastic resin composition in a solvent is applied onto a paper substrate by a known method such as roll coating, gravure roll coating, or kiss coating. It can be formed by a method of coating or the like.

The basis weight of the heat seal layer is preferably 50 g / m ² or less, more preferably 5 g / m ² or more and 35 g / m ² or less, and 10 g / m ² or more and 20 g / m ² or less. More preferred. When the basis weight of the heat seal layer is within the above range, it is possible to obtain a package 1 having a perforation 13 that is easy to open and can suppress unintended cutting. In addition, all of the required flexibility, softness, and strength of the packaging base material 10 can be achieved better, and there is a tendency that it is easy to secure the sealing property of the packaging body 1 and the adhesiveness of the sealing portion 12. be.

The basis weight of the heat seal layer can be obtained, for example, as follows.
First, a 0.1 M aqueous acetic acid solution and a 0.1 M aqueous sodium acetate solution are prepared. About 830 g of a 0.1 M acetic acid aqueous solution and about 160 g of a 0.1 M sodium acetate aqueous solution are mixed so that the pH becomes 4, and this is used as an acetate buffer. Cellulase Onozuka p1500 (manufactured by Yakult Pharmaceutical Co., Ltd.) is added to this acetate buffer so that the addition amount is 1% by weight.
50 ml of an acetate buffer solution to which Cellulase Onozuka p1500 is added and 0.5 g of a packaging base material 10 (paper base material on which a heat seal layer is formed) are placed in a vial and tightly covered. Next, after shaking at 180 rpm and 40 ° C. for 24 hours, the heat-sealed layer is collected from the vial and the mass of the heat-sealed layer portion is measured. From the mass (0.5 g) of the packaging base material 10 (paper base material on which the heat seal layer is formed) and the mass of the collected heat seal layer, the basis weight of the heat seal layer is calculated by the following formula.
Basis weight of heat seal layer =
Basis weight of packaging base material 10 × (mass of heat seal layer / mass of packaging base material 10)

(2-2) Adhesive Layer In the package 1 of the present invention, the adhesive layer is a part of the surface even if it is formed on the entire surface of the paper base material or the heat seal layer formed on the paper base material. For example, it may be formed only in a portion where the paper base materials are laminated and bonded to each other. The position, size, and proportion of the adhesive layer forming the adhesive layer on the surface of the paper substrate can be appropriately set.

The adhesive constituting the adhesive layer is not particularly limited, and any known adhesive can be used. For example, an ethylene-based adhesive, a two-component curable urethane-based adhesive, a polyester urethane-based adhesive, or a poly Etherurethane adhesives, acrylic adhesives, styrene-acrylic adhesives, polyester adhesives, polyamide adhesives, polyvinyl acetate adhesives, epoxy adhesives, rubber adhesives, etc. can be used. can. Among these, a styrene-acrylic adhesive is preferable.

The adhesive layer is formed by applying an adhesive to a paper base material, a heat seal layer formed on the paper base material, or the like by a known method such as a roll coat, a gravure roll coat, or a kiss coat. can do.

The basis weight of the adhesive layer (dry coating amount of the adhesive) is usually preferably 2 g / m ² or more and 30 g / m ² or less, more preferably 3 g / m ² or more and 25 g / m ² or less, and 5 g / m ² or more. 20 g / m ² or less is more preferable.
The basis weight of the adhesive layer is calculated by the following formula from the basis weight of the packaging base material 10 and the basis weight of the paper base material measured in accordance with JIS P 8124 before the adhesive layer is provided.
Basis weight of adhesive layer = Basis weight of packaging base material 10-Basis weight of paper base material

As described above, in the packaging base material 10 of the present invention, the seal layer is preferably a heat seal layer and / or an adhesive layer, but usually, the heat seal layer, particularly the polyolefin resin, is more than the adhesive layer. The heat-sealing layer containing the above-mentioned material has better adhesiveness, and it may be easier to package the paper product 11 by providing the heat-sealing layer, preferably the heat-sealing layer containing the polyolefin resin. Further, it is possible to obtain a package 1 having a perforation 13 that is easy to open and can suppress unintended cutting.

(3) Other Layers The packaging base material 10 of the present invention may include other layers in addition to the paper base material and the sealing layer. Examples of other layers include a water vapor barrier layer, an oxygen barrier layer, a printing layer, a printability improving layer, an overprint layer, a light shielding layer, and the like. These other layers may be provided, for example, between the paper base material and the sealing layer, or on the uppermost surface of the packaging base material 10, and may be one layer or two or more layers.

(4) Physical Properties of the entire Packaging Base Material As will be described later, there are various packaging formats for the packaging body 1 according to the present invention, and there are cases where the paper product 11 is wrapped from the production line direction (transportation direction; MD direction). In some cases, the paper product 11 is wrapped from the width direction (CD direction) orthogonal to the production line direction. When wrapping the paper product 11 from the MD direction, the tensile strength of the packaging base material 10 in the MD direction is preferably 2.0 kN / m or more and 8.0 kN / m or less, and 2.5 kN / m or more and 6.5 kN / m or less. It is more preferably m or less, and further preferably 3.3 kN / m or more and 5.5 kN / m or less. When wrapping the paper product 11 from the CD direction, the tensile strength of the packaging base material 10 in the CD direction is preferably 0.7 kN / m or more and 4.0 kN / m or less, and 0.9 kN / m or more and 3.0 kN / m or less. It is more preferably m or less, and further preferably 1.1 kN / m or more and 2.0 kN / m or less. By setting the tensile strength of the packaging base material 10 in the MD direction or the CD direction within the above range, the bond ratio in the direction substantially parallel to the MD direction and the direction orthogonal to the MD direction (CD direction) as in the present invention can be obtained. It is possible to obtain a package 1 having a perforation 13 that is easy to open and can suppress unintended cutting under conditions where the bond ratios in substantially parallel directions are different. The tensile strength of the packaging base material 10 can be measured according to JIS P 8113.

When wrapping the paper product 11 from the MD direction, the breaking elongation of the packaging base material 10 in the MD direction is preferably 0.8% or more and 2.4% or less, and 1.0% or more and 2.1% or less. More preferably, it is more preferably 1.2% or more and 1.8% or less. When wrapping the paper product 11 from the CD direction, the breaking elongation of the packaging base material 10 in the CD direction is preferably 3.0% or more and 7.0% or less, and 3.5% or more and 6.7% or less. More preferably, it is more preferably 4.0% or more and 6.0% or less. By setting the breaking elongation of the packaging base material 10 in the MD direction or the CD direction within the above range, it is possible to obtain a package 1 having a perforation 13 that is easy to open and can suppress unintended cutting. The breaking elongation of the packaging base material 10 can be measured according to JIS P 8113.

When wrapping the paper product 11 from the MD direction, the tear strength of the packaging base material 10 in the MD direction is preferably 350 mN or more and 1400 mN or less, more preferably 450 mN or more and 1200 mN or less, and 580 mN or more and 900 mN or less. Is more preferable. When wrapping the paper product 11 from the CD direction, the tear strength of the packaging base material 10 in the CD direction is preferably 600 mN or more and 2000 mN or less, more preferably 700 mN or more and 1700 mN or less, and 900 mN or more and 1500 mN or less. Is more preferable. Further, the ratio of the tear strength in the CD direction (tear strength (CD) / tear strength (MD)) to the tear strength in the MD direction is preferably 1.1 or more and 4.5 or less, and 1.2 or more and 4. It is more preferably 0 or less, and further preferably 1.4 or more and 2.5 or less. By setting the tear strength of the packaging base material 10 in the MD direction or the CD direction or their ratio within the above range, the bond ratio in the direction substantially parallel to the MD direction and the direction orthogonal to the MD direction as in the present invention ( Under the condition that the bond ratio in the direction substantially parallel to the CD direction is different, it is possible to obtain the package 1 having the perforations 13 which is easy to open and can suppress unintended cutting. The tear strength of the packaging base material 10 can be measured according to JIS P 8116.

The burst strength of the packaging base material 10 is preferably 90 kPa or more and 310 kPa or less, more preferably 120 kPa or more and 260 kPa or less, and further preferably 150 kPa or more and 220 kPa or less. By setting the burst strength of the packaging base material 10 within the above range, it is possible to obtain a packaging body 1 having a perforation 13 that is easy to open and can suppress unintended cutting. The burst strength of the packaging base material 10 can be measured according to JIS P 8112.

When wrapping the paper product 11 from the MD direction, the bending stiffness of the packaging base material 10 in the MD direction is preferably 20 μN · m or more and 330 μN · m or less, more preferably 30 μN · m or more and 225 μN · m or less, and 60 μN ·. It is more preferably m or more and 170 μN · m or less. When wrapping the paper product 11 from the CD direction, the bending stiffness of the packaging base material 10 in the CD direction is preferably 8 μN ・ m or more and 145 μN ・ m or less, and more preferably 13 μN ・ m or more and 100 μN ・ m or less. , 20 μN · m or more and 65 μN · m or less is more preferable. When the bending stiffness of the packaging base material 10 in the MD direction or the CD direction is within the above range, it is possible to obtain a package 1 having a perforation 13 that is easy to open and can suppress unintended cutting. In addition, the required flexibility and softness of the packaging base material 10 can be easily achieved. The bending stiffness of the packaging substrate 10 can be measured according to ISO 2493. Since the bending stiffness becomes the strongest when a load is applied in the long axis direction of the fiber, when the fiber orientation ratio is close to 1.0, the bending stiffness in the MD direction tends to be small and the bending stiffness in the CD direction tends to be large. There is.

The thickness of the packaging substrate 10 of the present invention is preferably 40 μm or more and 135 μm or less, more preferably 48 μm or more and 110 μm or less, and further preferably 68 μm or more and 92 μm or less. When the thickness of the packaging base material 10 is within the above range, it is possible to obtain a package 1 having perforations 13 that are easy to open and can suppress unintended cutting. The thickness of the packaging base material 10 can be measured according to JIS P 8118: 1998. The pressure condition of the pressurized surface was 100 kPa.

The density of the packaging base material 10 is preferably 0.6 g / cm ³ or more and 0.95 g / cm ³ or less, more preferably 0.65 g / cm ³ or more and 0.90 g / cm ³ or less, and 0. It is more preferably .70 g / cm ³ or more and 0.85 g / cm ³ or less. When the density of the packaging base material 10 is within the above range, it is possible to obtain the packaging body 1 having the perforations 13 which is easy to open and can suppress unintended cutting. In addition, the required strength, suppleness and softness of the packaging base material 10 can be easily achieved. The density of the packaging base material 10 can be measured and calculated in accordance with JIS P 8118: 1998.

For example, when packaging a tissue paper laminate as a paper product 11, the density of the tissue paper laminate is preferably 0.04 g / cm ³ or more and 0.30 g / cm ³ or less, and 0.07 g / cm ³ or more and 0. It is more preferably .25 g / cm ³ or less, and further preferably 0.10 g / cm ³ or more and 0.20 g / cm ³ or less. When the density of the tissue paper laminate is within the above range, it is possible to obtain a package 1 in which the paper product 11 can be easily taken out from the take-out port 14. Further, when the perforation is opened by holding the package in the hand, it is possible to obtain the package 1 having the perforation 13 which is easy to open and can suppress unintended cutting. Further, the paper product 11 can be easily wrapped. The density of the tissue paper laminate is measured as follows. First, the tissue paper laminate is collected from the package 1, and the mass of the tissue paper laminate is measured at 23 ° C. and 50% after humidity control with an electronic balance. Then, the size (width, depth, height (length of the paper product 11)) of the tissue paper laminate is measured with a ruler, and the density is calculated by the following formula.
Density of tissue paper laminate (g / cm ³ ) = mass of tissue paper laminate (g) / (width of tissue paper laminate (cm) x depth of tissue paper laminate (cm) x height of tissue paper laminate (Cm)

3. 3. Paper product As the paper product 11 to be packaged by the package 1 of the present invention, the package 1 of the present invention wraps a soft paper product such as thin paper, and the thin paper includes tissue paper, wiper, and wet tissue. , Laminated thin paper such as paper hand towels. It is preferable that the laminated thin paper is a pop-up type because it can be easily pulled out from the take-out port 14 in the package 1 of the present invention. Further, the laminated thin paper may be in a pop-up type in a folded state like a general tissue paper laminated body, and more preferably in a pop-up type in a folded state in four.
FIG. 4 is a perspective view showing an example of a paper product 11 packaged by the package 1 of the present invention. At this time, the length of the side 15 of the paper product 11 is preferably 50 mm or more and 230 mm or less, more preferably 65 mm or more and 200 mm or less, and further preferably 80 mm or more and 120 mm or less. The length of the side perpendicular to the side 15 of the paper product 11 is preferably 50 mm or more and 150 mm or less, more preferably 70 mm or more and 130 mm or less, and further preferably 90 mm or more and 110 mm or less. The thickness of the paper product 11 is preferably 10 mm or more and 110 mm or less, more preferably 20 mm or more and 80 mm or less, and further preferably 30 mm or more and 50 mm or less. By keeping the size of the paper product 11 within the above range, when the perforation 13 is opened by holding the package 1 in the hand, the package has the perforation 13 which is easy to open and can suppress unintended cutting. Body 1 can be obtained.

Further, when the length of the side 15 of the paper product 11 is G and the length of one side substantially parallel to the MD direction of the perforation 131 is H, one side substantially parallel to the MD direction of the perforation 131, which is the ratio thereof. / The length of the side 15 of the paper product 11 (that is, H / G) is preferably 0.4 or more and 1.6 or less, and more preferably 0.5 or more and 1.3 or less. It is more preferably 0.7 or more and 1.0 or less. By setting the ratio within the above range, the resistance when pulling out the paper product 11 becomes appropriate, and the take-out port 14 in which the paper product 11 can be easily taken out can be formed.

When the laminated thin paper is tissue paper, it is preferably 2-ply. As for the paper quality, the basis weight per ply is preferably 10 g / m ² or more and 20 g / m ² or less, more preferably 12 g / m ² or more and 18 g / m ² or less, and 14 g / m ² or more. It is more preferably 16 g / m ² or less. The paper thickness of 5 sets (10 sheets) with 2 plies is preferably 0.4 mm / 10 sheets or more and 1.1 mm / 10 sheets or less, and 0.5 mm / 10 sheets or more and 1.0 mm / 10. The number of sheets or less is more preferable, and the number of sheets is 0.6 mm / 10 sheets or more and 0.9 mm / 10 sheets or less. By setting the basis weight and the paper thickness within the above numerical ranges, the density of the laminated body can be set within an appropriate range, and the package 1 in which the paper product 11 can be easily taken out from the take-out port 14 can be obtained.
The basis weight per ply can be measured and calculated in accordance with JIS P 8124. The paper thickness is measured using a thickness gauge (dial thickness gauge "PEACOCK (registered trademark)" manufactured by Ozaki Seisakusho Co., Ltd.). The measurement conditions are a measuring load of 3.7 kPa, a stylus diameter of 30 mm, a sample is placed between the stylus and the measuring table, and the gauge when the stylus is lowered at a speed of 1 mm or less per second is read. In addition, the measurement is repeated 10 times and the measurement results are averaged.

Further, when the laminated thin paper is tissue paper, the vertical tensile strength per 2 plies when dried is preferably 2.3 N / 25 mm or more and 6.0 N / 25 mm or less, and 2.6 N / 25 mm or more and 5.0 N or less. It is more preferably / 25 mm or less, and further preferably 2.9 N / 25 mm or more and 4.0 N / 25 mm or less. Further, the lateral tensile strength at the time of drying per 2 plies is preferably 0.6 N / 25 mm or more and 2.5 N / 25 mm or less, and more preferably 0.8 N / 25 mm or more and 2.2 N / 25 mm or less. , 1.0 N / 25 mm or more and 1.9 N / 25 mm or less is more preferable. By setting the tensile strength in the vertical and horizontal directions during drying within the above numerical range, the density of the laminated body can be set within an appropriate range, and the package 1 in which the paper product 11 can be easily taken out from the take-out port 14 can be obtained. Obtainable.
The tensile strengths in the vertical direction and the horizontal direction during drying can be measured and calculated in accordance with JIS P 8113.
Further, the above-mentioned basis weight, paper thickness, and tensile strength are measured after being held in an equilibrium state under the temperature and humidity conditions (23 ± 1 ° C., 50 ± 2% RH) specified in JIS P 8111.

4. Packaging format Examples of the packaging format of the package 1 according to the present invention include caramel packaging, pillow packaging, and gusset packaging.

Caramel packaging is a packaging base material that extends along one direction of the object to be packaged, and the object to be packaged is wound in a direction intersecting this direction, or from one end of the packaging base material formed in a tubular shape in the axial direction. Put the packaged items. Then, of the packaging base materials protruding from both ends of the object to be packaged, the two opposing flap-shaped sides are folded with each other, and then the other two opposing flap-shaped sides are similarly folded with each other, and these folded portions are folded. Is a packaging type that is sealed by heat fusion or the like. Caramel packaging is preferred for packaging laminated tissue paper. This caramel packaging can be done using known equipment.

Pillow packaging is a method in which an object to be packaged placed on or under a sheet-shaped packaging base material is overlapped with each other on the inner surfaces at both ends in the width direction so as to wrap the packaged material in a cylindrical shape. The combined parts are formed into a cylindrical shape by heat-sealing, etc., and the bottom part or the mouth part is sealed with a heat seal, etc. in a single horizontal letter according to the length (height) of the bag. It is a packaging type in which each bag is cut in this sealed portion. This pillow packaging can be done using known equipment.
The pillow packaging includes vertical pillow packaging in which the packaging base material is sent vertically to wrap the packaged object while filling it from above, and horizontal pillow packaging in which the packaging substrate is sent horizontally to wrap the packaged object. There is. When packaging thin paper, horizontal pillow packaging is preferable because of the packaging speed and the form of the thin paper.

In gusset packaging, the packaged material placed on or under the sheet-shaped packaging base material is overlapped on the inner surfaces at both ends in the width direction so as to wrap the packaged material in a cylindrical shape, and this stacking is performed. Form the combined part into a cylindrical shape by heat-sealing, etc., and weave both ends of the bottom part or the mouth part inside according to the length (height) of the bag to make a gusset, one horizontal character It is a packaging type that is sealed with a heat seal or the like and cut into each bag at this sealed part. This gusset packaging can be done using known equipment.

In a certain embodiment, for example, when a packaging base material 10 having a bending stiffness in the MD direction of 20 μN ・ m or more and 330 μN ・ m or less is used, the packaging body 1 of the present invention uses, for example, the packaging base material 10 in the form of a continuous sheet. After the paper product 11 is placed, the paper product 11 is wrapped and wrapped from the transport direction (production line direction; MD direction), and cut to a predetermined size from the width direction (CD direction) orthogonal to the transport direction. This is particularly preferably applied in the case, that is, when the wrapping direction is the MD direction of the packaging base material 10. In this case, in the package 1 of the present invention, it is preferable to select caramel packaging as the packaging format. The paper product 11 may be placed after the packaging base material 10 is cut to a predetermined size, or the packaging base material 10 may be cut to a predetermined size after the paper product 11 is placed.

In another embodiment, for example, when a packaging base material 10 having a bending stiffness in the CD direction of 8 μN ・ m or more and 145 μN ・ m or less is used, the packaging body 1 of the present invention uses, for example, the packaging base material 10 as a continuous sheet. After transporting in the form and arranging the paper product 11, when packaging the paper product 11 while wrapping it from the width direction (CD direction) orthogonal to the transport direction (production line direction; MD direction), that is, the wrapping direction is the packaging base. It is particularly preferably applied when the material 10 is in the CD direction. In this case, in the package 1 of the present invention, it is preferable to select gusset packaging or pillow packaging as the packaging format, and gusset packaging is more preferable. Also in this case, the paper product 11 may be placed after the packaging base material 10 is cut to a predetermined size, or the packaging base material 10 may be cut to a predetermined size after the paper product 11 is placed. good.
The perforations 13 are preferably formed while being conveyed to any of the above packaging steps, but the perforations 13 may be provided on the packaging base material 10 in advance.

Although the present invention has been described above using the embodiments, it goes without saying that the technical scope of the present invention is not limited to the scope described in the above-described embodiments and examples. It will be apparent to those skilled in the art that various changes or improvements can be made to the above embodiments. It is also clear from the description of the claims that the form with such changes or improvements may be included in the technical scope of the present invention.

Hereinafter, the present invention will be described in detail with reference to examples. The present invention is not limited to the examples shown below.

In Examples and Comparative Examples, the physical property values of the prepared packaging base materials were measured by the following methods.

(Basis weight of packaging base material)
The basis weight of the packaging base material was measured according to JIS P 8124.

(Basis weight of paper substrate and basis weight of heat seal layer)
First, a 0.1 M aqueous acetic acid solution and a 0.1 M aqueous sodium acetate solution were prepared. About 830 g of a 0.1 M acetic acid aqueous solution and about 160 g of a 0.1 M sodium acetate aqueous solution were mixed to adjust the pH to 4, and this was used as an acetate buffer. Cellulase Onozuka p1500 (manufactured by Yakult Pharmaceutical Co., Ltd.) was added to this acetate buffer so that the addition amount was 1% by weight.
50 ml of an acetate buffer solution to which Cellulase Onozuka p1500 was added and 0.5 g of a packaging base material (paper base material on which a heat seal layer was formed) were placed in a vial and closed tightly. Next, after shaking at 180 rpm and 40 ° C. for 24 hours, the heat-sealed layer was collected from the vial and the mass of the heat-sealed layer portion was measured. From the mass (0.5 g) of the packaging base material (paper base material on which the heat seal layer is formed) and the mass of the collected heat seal layer, the basis weight of the paper base material and the basis weight of the heat seal layer are calculated by the following formula. Was calculated.
Basis weight of paper base material =
Basis weight of packaging base material x [(mass of packaging base material-mass of heat seal layer) / mass of packaging base material]
Basis weight of heat seal layer =
Basis weight of packaging base material x (mass of heat seal layer / mass of packaging base material)

(Basis weight of adhesive layer (dry coating amount of adhesive))
From the basis weight of the packaging base material obtained as described above and the basis weight of the paper base material measured in accordance with JIS P 8124 before the adhesive layer is provided, the basis weight of the adhesive layer is calculated by the following formula. Was calculated.
Basis weight of adhesive layer = Basis weight of packaging base material-Basis weight of paper base material

(Thickness of packaging base material)
The thickness of the packaging base material was measured in accordance with JIS P 8118: 1998 using an automatic elevating paper thickness gauge standard model TM-600 (manufactured by Kumagai Riki Kogyo Co., Ltd.). The pressure condition of the pressurized surface was 100 kPa.

(Density of packaging base material)
The density of the packaging base material was measured and calculated in accordance with JIS P 8118: 1998.

(Tensile strength of packaging substrate in MD direction and CD direction)
The tensile strength of the packaging substrate in the MD direction and the CD direction was measured according to JIS P 8113.

(Breaking elongation of the packaging base material in the MD direction and the CD direction)
The breaking elongation of the packaging substrate in the MD direction and the CD direction was measured according to JIS P 8113.

(Tear strength of packaging substrate in MD direction and CD direction)
The tear strengths of the packaging substrate in the MD direction and the CD direction were both measured according to JIS P 8116.

(Rupture strength of packaging base material)
The burst strength of the packaging substrate was measured according to JIS P 8112.

(Measurement of bending stiffness in the MD direction and CD direction of the packaging base material)
The bending stiffness in the MD direction and the CD direction of the packaging substrate was measured by using an L & W bending tester (manufactured by Lorentzen & Wettre) in accordance with the method described in ISO 2493. For the packaging base material, for a test piece with a width of 38 mm and a length of 100 mm, the measured value when the bending angle is 15 degrees and the bending length (span of the sample table) is 10 mm is the bending resistance (load), and the following calculation formula is used. The bending stiffness (μN · m) was determined.
Bending stiffness (μN ・ m) = 60 × bending resistance (mN) × bending length 10 (mm) ² ÷ (π × bending angle 15 (°) × sample width 38 (mm))
If a test piece having a length of 100 mm cannot be collected, the length of the test piece can be shortened. Further, the test piece does not include the perforation of the take-out port, but may include the perforation when it is necessary to include the perforation in order to secure the size of the test piece.

(Example 1)
(Packaging base material)
A paper base material using 100% by weight of unbleached softwood kraft pulp (NUKP) as a pulp raw material was prepared. Then, a polyethylene layer was formed on the paper base material as a heat seal layer by an extrusion method to prepare a packaging base material. Basis weight of the prepared packaging base material, basis weight of the paper base material, and basis weight of the heat seal layer, thickness and density of the packaging base material, tensile strength in the MD direction and the CD direction, breakage in the MD direction and the CD direction. Table 1 shows the results of measuring the elongation, the burst strength, the bending stiffness in the MD direction and the CD direction, and the tear strength in the MD direction and the CD direction and their ratios.

(Tissue paper packaging (gusset packaging))
Using the prepared packaging base material, a package having a size of 18 cm in the MD direction of the packaging base material × 11 cm in the CD direction of the packaging base material × 5 cm in height was prepared. Then, 50 sets of tissue paper 2 plies as paper products were put into this package in a pop-up manner in a state of being folded in four, and sealed by gusset packaging to obtain a tissue paper package. In addition, the paper product was wrapped and wrapped from the direction of the CD. Further, the tissue paper package has three sealing portions, and the perforations are formed immediately before packaging the tissue paper. A part of the perforation (50% of the total length of one side substantially parallel to the MD direction) changed the length of the connection, the length of the cut line, and the bond ratio as shown in Table 1.

(Easy to open perforations and difficult to cut perforations)
With respect to the prepared tissue paper package, the ease of opening the perforations and the difficulty of cutting the perforations were evaluated by 30 monitors for each of the MD direction, the CD direction, and a part of the MD direction. The common evaluation criteria are as follows.
・ Easy to open perforations A: People who find it difficult to cut perforations and form outlets 0 to 1 people B: People who find it difficult to cut perforations and form outlets 2-3 Person C: People who felt that it was difficult to cut the perforations and formed the outlet 4 to 6 people D: People who felt that the perforations were difficult to cut and it was difficult to form the outlet 7 to 15 people E: People who felt that the perforations were difficult to form 16 to 30 people who find it difficult to cut and form an outlet ・ People who feel that the perforations are too easy to cut and unintentionally cut before opening 0 to 1 Person B: People who felt that the perforations were too easy to cut and unintentionally cut before opening 2-3 people C: People who felt that the perforations were too easy to cut and unintentionally cut before opening 4 to 6 people D: People who felt that the perforations were too easy to cut and unintentionally cut before opening 7 to 15 people E: Perforations were too easy to cut and unintentionally cut before opening 16 to 30 people who felt that they would end up

(Example 2) to (Example 20), (Comparative Example 1) to (Comparative Example 8)
In Examples 2 to 20 and Comparative Examples 1 to 8, packaging base materials having the physical characteristics shown in Tables 1 and 2 were prepared in the same manner as in Example 1, and using this, a tissue was prepared in the same manner as in Example 1. A paper package (gusset package) was prepared, and the ease of opening the perforations and the difficulty of cutting the perforations were evaluated for a part of the MD direction, the CD direction, and the MD direction, respectively. However, in Example 18, instead of providing the polyethylene layer as the heat seal layer on the paper substrate, a styrene-acrylic adhesive layer (adhesive coating amount: 10.8 g / m ² ) was provided. Further, in Example 19, 26 sets of tissue paper 2 plies were put as paper products, and in Example 20, 72 sets of tissue paper 2 plies were put as paper products to prepare a tissue paper package.

As is clear from the results shown in Tables 1 and 2, the packages of Examples 1 to 20 are easy to open perforations, can suppress unintended cutting, and are easy to open from a specific direction or location. there were. On the other hand, in Comparative Examples 1 to 8, the perforations are difficult to cut and it is difficult to form a take-out port, or the perforations are too easy to cut unintentionally before opening, or it is difficult to open from a specific direction or location. It was a thing.
Therefore, the package of the present invention can suppress unintended cutting because the perforations are easy to open in the package of the paper product packaged with the packaging base material including the paper base material, and the perforations are in a specific direction. Alternatively, it is possible to provide a paper product package that is easy to open from a location and easily forms an outlet.

1 Package 10 Packaging base material 11 Paper products (objects to be packaged)
12 Seals 13, 131, 132 Perforations 14 Outlet 15 Side of paper product 11

Claims (9)

The entire paper product is covered with a packaging base material containing at least a paper base material, the paper product is sealed by at least one sealing portion, and the packaging base material serves as an outlet for the paper product. A package with perforations to form,
The paper product is laminated thin paper,
The basis weight of the packaging base material is 35 g / m ² or more and 105 g / m ² or less.
The perforations are substantially rectangular on the surface of the packaging base material that covers the upper part of the paper product, and two sides of the substantially rectangular shape in the longitudinal direction are in the production line direction (MD direction) of the packaging base material. Prepared to be approximately parallel to
The bond ratio of the perforations in a direction substantially parallel to the MD direction is 6% or more and 30% or less.
A package for paper products, wherein the bond ratio in a direction substantially parallel to the direction orthogonal to the MD direction (CD direction) of the perforations is 4% or more and 26% or less. The packaging body for paper products according to claim 1, wherein the density of the packaging base material is 0.6 g / cm ³ or more and 0.95 g / cm ³ or less. The package for paper products according to claim 1 or 2, wherein the tear strength of the packaging base material in the MD direction is 350 mN or more and 1400 mN or less. The package for paper products according to any one of claims 1 to 3, wherein the tear strength of the packaging base material in the CD direction is 600 mN or more and 2000 mN or less. Among the perforations, on one side substantially parallel to the MD direction, the bond ratio at 30% or more and 70% or less of the total length of the one side is 3% or more and 20% or less. The packaging for paper products according to any one of claims 1 to 4. The packaging body for paper products according to any one of claims 1 to 5, wherein the packaging base material further contains a sealing layer. The packaging for paper products according to claim 6, wherein the sealing layer is a heat sealing layer and / or an adhesive layer. The packaging body for paper products according to claim 7, wherein the heat-sealing layer contains a polyolefin-based resin. The packaging for paper products according to any one of claims 1 to 8, wherein the packaging is caramel packaging, gusset packaging, or pillow packaging.

Images