JP7406452B2 - Packaging for paper products - Google Patents

Description

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

BACKGROUND ART Conventionally, packaging bodies are known that accommodate roll-shaped paper products such as toilet paper and kitchen paper, and laminated paper products such as tissue paper and wipers as packaged items.

For example, Patent Document 1 discloses a packaging body for wrapping paper products in the form of a roll, in which a gusset is folded symmetrically into a cylindrical film such as polyethylene to form a main body, and the upper part is folded into a flat shape to form a gripping part. What constitutes this is disclosed.

On the other hand, as a package for packaging a laminated paper product, a paper carton made of paperboard with a high basis weight is generally used. Further, as a packaging body that can replace a paper carton, for example, Patent Document 2 discloses a film packaging body in which a perforation is provided in the center of the top surface of a packaging bag formed from a flexible resin film. There is.

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

However, there has been a demand for a novel packaging body in which paper products such as the above-mentioned paper products, particularly paper products such as tissue paper, are packaged. In particular, as awareness of environmental issues has increased in recent years, it has been desired to reduce the use of plastics (synthetic resins). In addition, it is desired to reduce the amount of packaging materials used in paper packaging, but when paper products, especially soft paper products such as thin paper, are to be packaged, the base material is This has been difficult to achieve because it is difficult to bend at a predetermined position or may be bent at an unintended position, resulting in poor packaging.

Additionally, although paper cartons made by pasting together rigid papers have existed, until now it has not been found that the shape of the seal part has good adhesion and is suitable for the packaging base material used to package paper products. It wasn't.
In order to improve the adhesion of the seal part, for example, it may be possible to provide the seal part with an uneven pattern, but in that case, the package is likely to be scratched by rubbing during transportation or transportation. Therefore, if a pattern with no unevenness is used, it will be less likely to be damaged, but this will also make it difficult for the seal portion to adhere, and the package may be opened unintentionally. Therefore, it has been difficult to make the seal portion less likely to be damaged and to have good adhesion.

The present invention has been made in view of the above circumstances, and its purpose is to provide a seal that is hard to be damaged and has good adhesion even when the seal has a pattern with no unevenness, so that it can be easily packaged. It is an object of the present invention to provide a packaging body for paper products that is excellent in its later form.

The inventors of the present invention conducted extensive research in view of the above problems. As a result, by specifying the basis weight of the packaging base material and the PPS smoothness of the surface in contact with the paper product, even when the seal part has a pattern with no unevenness, the seal part is hard to be damaged and the adhesive The present inventors have discovered that it is possible to provide a packaging body for paper products that has good properties and an excellent shape after packaging, and that the above problems can be solved, and the present invention has been completed.
Specifically, the present invention provides the following.

(1) A first aspect of the present invention is that one or more paper products are entirely covered with a packaging base material, the paper products are sealed by at least one sealing part, and the surface of the sealing part is squared. A package having an average square root height Sq of less than 30 μm, wherein the packaging base material includes at least a paper base material and a sealing layer, and the basis weight of the packaging base material is 35 g/m 2 or more and 105 g/m ² or more. m ² or less, and the seal portion is provided at the end where the packaging base material overlaps, and the PPS smoothness of the surface of the packaging base material in contact with the paper product is 1.5 μm or more and 4.3 μm. This is a paper product packaging body characterized by the following.
(2) A second aspect of the present invention is the packaging body for paper products according to (1), wherein the packaging base material has an Oken type smoothness of 35 on the side that comes into contact with the paper product. It is characterized in that the time is between 1500 seconds and 1500 seconds.
(3) A third aspect of the present invention is the paper product packaging according to (1) or (2), in which the PPS smoothness of the side of the packaging base material not in contact with the paper product is is 3 μm or more and 12 μm or less.
(4) A fourth aspect of the present invention is the paper product packaging according to any one of (1) to (3), in which the packaging base material has a surface on a side not in contact with the paper product. It is characterized by an Oken type smoothness of 6 seconds or more and 80 seconds or less.
(5) A fifth aspect of the present invention is the paper product packaging according to any one of (1) to (4), wherein the packaging base material has a bending stiffness of 20 μN·m or more in the MD direction. It is characterized by being 330 μN·m or less.
(6) A sixth aspect of the present invention is the paper product packaging according to any one of (1) to (5), wherein the packaging base material has a bending stiffness of 8 μN·m or more in the CD direction. It is characterized by being 145 μN·m or less.
(7) A seventh aspect of the present invention is the paper product packaging according to any one of (1) to (6), wherein the sealing layer is a heat sealing layer and/or an adhesive layer. It is characterized by this.
(8) An eighth aspect of the present invention is the paper product packaging described in (7), characterized in that the heat seal layer contains a polyolefin resin.
(9) A ninth aspect of the present invention is the paper product packaging according to any one of (1) to (8), wherein the paper product is thin paper. .
(10) A tenth aspect of the present invention is the paper product packaging according to (9), characterized in that the thin paper is a laminated thin paper.
(11) An eleventh aspect of the present invention is the paper product packaging according to any one of (1) to (10), characterized in that the packaging is a gusset packaging or a pillow packaging. It is something to do.

According to the present invention, it is possible to provide a packaging body for paper products that is hard to damage even when the seal part has a pattern without unevenness, has good adhesive properties, and has an excellent shape after packaging. can.

BRIEF DESCRIPTION OF THE DRAWINGS It is a perspective view which shows an example of the packaging body for paper products and paper products of this invention. It is a figure explaining the measuring method of the root mean square height Sq of the surface of the seal|sticker part of the packaging body for paper products of this invention.

Hereinafter, modes for carrying out the present invention (hereinafter referred to as embodiments) will be described in detail with reference to the drawings, but these are provided for the purpose of illustration and are not intended to 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 (hereinafter also simply referred to as "packaging") and paper products of the present invention. In the package 1 of the present invention, a paper product (packaged object) 11 is entirely covered with a packaging base material 10, and the paper product 11 is sealed with at least one seal portion 12. Further, the seal portion 12 is provided at the end where the packaging base materials 10 overlap. At this time, as shown in FIG. As long as the adhesiveness (adhesiveness of the sealing part 12) can be ensured, the sealing part 12 may be formed in a different location or have a different shape, and even if three or more sealing parts 12 are provided. For example, in addition to the seal parts 12 at both ends of the package 1 shown in FIG. (not shown). Moreover, in the package 1, the packaging base material 10 may cover not the whole paper product 11 but a part thereof, and the paper product 11 does not need to be sealed (not shown).

Note that it is preferable that the package 1 includes a take-out opening for taking out the paper product 11 (not shown). This outlet is preferably provided by forming a perforation line or the like on the packaging base material 10 so that the opening can be opened by cutting the perforation line during use.

Further, the root mean square height Sq of the surface of the seal portion 12 is less than 30 μm. If the root mean square height Sq is 30 μm or more, slight unevenness will occur on the surface of the seal portion 12, and the packages 1 will rub against each other during transport or transportation, making the packages 1 likely to be damaged. Become. Since the root mean square height Sq is less than 30 μm, it is possible to form the seal portion 12 without unevenness.
The length of the seal portion 12 in the width direction is preferably 2 mm or more and 35 mm or less, more preferably 4 mm or more and 24 mm or less, and even more preferably 6 mm or more and 13 mm or less. By setting the length of the seal portion 12 in the width direction within the above-mentioned numerical range, the adhesiveness of the seal portion 12 can be made good, and a package 1 having an excellent shape after packaging can be obtained.

A method for measuring the root mean square height Sq of the surface of the seal portion 12 will be described below.
The root mean square height Sq of the surface of the seal portion 12 is measured using a microscope. As the microscope, a product name "One Shot 3D Measurement Microscope VR-3100" manufactured by Keyence Corporation can be used. As the microscope image observation, measurement, and image analysis software, the product name "VR-H1A" manufactured by Keyence Corporation can be used. Further, the measurement conditions are a magnification of 38 times and a visual field area of 8 mm x 6 mm. Note that the measurement magnification and field of view area may be changed as appropriate.
Further, the measurement surface of the seal portion 12 is the front side of the package 1 when the package 1 has a front and back side (the package 1 is provided with a take-out opening). The measurement points are measured at four locations where two packaging base materials 10 are stacked in the seal portion 12 (three locations if there are no four locations, and two locations where there are no three locations). In addition, when two seal parts 12 are provided as shown in FIG. (2 places on the seal part 12 of 1 and 2 places on the other seal part 12).

First, as shown in FIG. 2(a), a two-dimensional uneven image on the XY plane of the field of view is obtained using a microscope. It can be seen that in the uneven image, the height of the surface of the seal portion 12 is expressed by shading.
Next, when the operator draws a line segment in the width direction so as to be perpendicular to the longitudinal direction of the seal portion 12, a cross-sectional curve (measured) representing unevenness (cross-sectional profile) as shown in FIG. 2(b) is obtained. can get.
Here, the (measured) cross-sectional curve in FIG. In calculating the root mean square height Sq of the surface of the seal portion 12, it is necessary to remove such noise peaks. be.

Therefore, using the above analysis software, the (measured) cross-sectional curve in Figure 2(b) was smoothed by setting the filter size of the weighted average radio button to ±12, and the cross-sectional curve after noise removal in Figure 2(c) was smoothed. get.
Then, in the graph shown in FIG. 2(c), the root mean square height Sq is determined (automatically calculated by the analysis software). The root mean square height Sq of the seal portion 12 is the average value of the root mean square heights obtained at the four, three, or two locations described above.

2. Packaging Base Material The packaging base material 10 includes at least a paper base material and a sealing layer. When the paper base material is formed as the package 1, printing may be applied to the outer surface side. Further, the paper base material may be an overcoated paper provided with an overcoat 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 , when the seal portion 12 is provided on the packaging base material 10 , the strength of the packaging base material 10 will be too low and it will bend at an unintended position, resulting in the seal portion being bent. 12 could not be adhered neatly, and the shape after packaging was poor. When the basis weight of the packaging base material 10 exceeds 105 g/m ² , the strength of the packaging base material 10 is too high and it is difficult to bend at a predetermined position, the sealing part 12 cannot be adhered neatly, and the shape after packaging is poor. By setting the basis weight of the packaging base material 10 within the above-mentioned numerical range, the adhesiveness of the seal portion 12 can be made good, and a package 1 having an excellent shape after packaging can be obtained.

(1) Paper base material Paper base material is manufactured using wood pulp as the main raw material. The pulps used here include softwood kraft pulp, hardwood kraft pulp, groundwood pulp, thermomechanical pulp, chemi-thermomechanical pulp, newspaper, flyers, bleached magazines, coated magazines, thermal recording paper, pressure-sensitive recording paper, and imitation paper. Conventionally known pulps, such as waste paper pulp such as paper, colored wood-free paper, copy paper, computer output paper, or mixed waste paper thereof, can be used alone or in a mixture at any blending 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 hardwood kraft pulp, 70 to 100% by weight of softwood kraft pulp, The content of hardwood kraft pulp is more preferably 0 to 30% by weight, the content of softwood kraft pulp is 90 to 100% by weight, and the content of hardwood kraft pulp is 0 to 10% by weight. By setting the above-mentioned pulp content, the adhesiveness of the seal portion 12 can be made good, and a package 1 having an excellent shape after packaging can be obtained. Further, 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.

Materials other than pulp fibers may be added to the pulp slurry as auxiliary materials. In the package 1, the content of pulp fibers 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. It is more preferable to use the following. By setting the above-mentioned pulp content, the adhesiveness of the seal portion 12 can be made good, and a package 1 having an excellent shape after packaging can be obtained. Moreover, the strength etc. of the packaging base material 10 becomes appropriate, and packaging becomes easier.

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

In addition, various commonly used additives such as wet paper strength enhancers, fillers, sizing agents, dry paper strength enhancers, retention improvers, coloring pigments, etc. may be added to the paper base material as necessary. may be added in an appropriate amount.

The wet paper strength improver can be selected from commonly used known ones. For example, it is preferable to select from polyamide/polyamine resins, polyacrylamide resins, melamine resins, and the like. The content (mass in an absolutely dry state) of such a wet paper strength improver is usually 0.01% or more by weight of the wet paper strength improver based on the pulp (mass in an absolutely dry state). It is preferably 7% by weight or less, preferably 0.02% by weight or more and 0.5% by weight or less, more preferably 0.03% by weight or more and 0.3% by weight or less. Even if the content of the wet paper strength improver 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 disintegration properties, resulting in the packaging of the present invention. It may be difficult to reuse the body 1 later. Furthermore, if the content of the wet paper strength improver is less than 0.01% by weight, it will be difficult to obtain sufficient wet paper strength, and the paper may be easily torn when wet with water, resulting in poor functionality as a package.

In the packaging body 1 of the present invention, the paper base material of the packaging base material 10 can be obtained by paper-making these raw materials through a normal paper-making process.

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 More preferably, it is 56 g/m ² or less. When the basis weight of the paper base material is within the above range, the adhesiveness of the seal portion 12 can be made good, and the package 1 can be obtained which has an excellent shape after packaging. Further, it becomes easier to achieve all of the required flexibility, softness, and strength of the packaging base material 10 while suppressing the amount of paper base material used.

The basis weight of the paper base material can be determined as follows, for example, when the sealing layer is a heat-sealing layer described below.
First, a 0.1M acetic acid aqueous solution and a 0.1M sodium acetate aqueous solution are prepared. About 830 g of a 0.1M aqueous acetic acid solution and about 160 g of a 0.1M aqueous sodium acetate solution are mixed to have a pH of 4, and this is used as an acetate buffer. Cellulase Onozuka p1500 (manufactured by Yakult Pharmaceutical Co., Ltd.) is added to this acetate buffer in an amount of 1% by weight.
50 ml of acetate buffer to which Cellulase Onozuka p1500 has been added and 0.5 g of packaging base material 10 (paper base material on which a heat-sealing layer is formed) are placed in a vial, and the vial is tightly capped. Next, after shaking at 180 rpm and 40° C. for 24 hours, the heat seal layer is collected from the vial, and the mass of the heat seal layer portion is measured. The basis weight of the paper base material is calculated from the mass (0.5 g) of the packaging base material 10 (the paper base material on which the heat seal layer is formed) and the mass of the sampled heat seal layer using the following formula.
Basis weight of paper base =
Basis weight of packaging base material 10 x [(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 even more preferably 70% or more and 90% or less. By setting it within the above range, the adhesiveness of the seal portion 12 can be made good, and the package 1 can be obtained which has an excellent shape after packaging. Furthermore, it is possible to ensure ease of packaging the soft paper product 11, and also to ensure good heat-sealability or adhesiveness.

(2) Seal layer In the package 1 of the present invention, the packaging base material 10 includes a seal layer in addition to the paper base material, and the seal layer is preferably a heat seal layer and/or an adhesive layer. The packaging base material 10 of the present invention is, for example, paper base material/heat seal layer, paper base material/adhesive layer, paper base material/heat seal layer/adhesive layer, paper base material/adhesive layer/heat seal layer. It is possible to have a layered structure such as the following.
Although the sealing layer is provided on the paper base material as described later, it is provided inside the paper base material (for example, when making the paper base material, the raw material for the sealing layer is also made, and the sealing layer is A method in which a packaging base material containing raw materials and having sealing properties is obtained) may also be used.

(2-1) Heat-sealing layer In the package 1 of the present invention, the heat-sealing layer may be formed on the entire surface of the paper base material, or may be formed on a part of the surface, for example, the paper base materials are laminated or bonded together. It may be formed only in a portion. The position and size of the heat seal layer on the surface of the paper base material, and the proportion occupied by the heat seal layer can be set as appropriate.

The material constituting the heat-sealing layer is not particularly limited, and any material that exhibits various heat-sealing properties can be used; for example, polyolefin resins, other thermoplastic resins, etc. can be used. . Among these, it is preferable to use polyolefin resins. 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, 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 resins obtained by grafting or copolymerizing unsaturated carboxylic acids, unsaturated carboxylic acid anhydrides, ester monomers, etc. to polypropylene, medium density polyethylene, etc. can be used. The materials constituting the heat seal layer may be used alone or in combination of two or more.

The heat-sealing layer can be formed by a commonly used method, such as 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 base material by an extrusion method, or a method using a known heat-sealing processing apparatus ( A method of pasting a film made of or containing a thermoplastic resin to a paper base material using a lamination processing device), a method in which a thermoplastic resin or a thermoplastic resin composition is dissolved or dispersed in water. A water-based heat sealing agent or a solvent-based heat sealing agent in which a thermoplastic resin or a thermoplastic resin composition is dissolved or dispersed in a solvent is applied onto a paper base material by a known method such as roll coating, gravure roll coating, kiss coating, etc. It can be formed by a method such as coating.

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. By having the basis weight of the heat-sealing layer within the above range, the adhesiveness of the seal portion 12 can be made good, and the package 1 can be obtained which has an excellent shape after packaging. In addition, all of the required flexibility, softness, and strength of the packaging base material 10 can be better achieved, and the sealing properties of the packaging body 1 and the adhesiveness of the seal portion 12 tend to be easily ensured. be.

Further, as described above, the package 1 of the present invention preferably has an outlet for taking out the paper product 11, and a perforation or other perforation line is formed in the outlet so that the package 1 can be opened by cutting the perforation line. It is preferable to do so. The outlet is required to be easy to open and difficult to tear, but the package 1 that wraps the soft paper product 11 may be difficult to open depending on how much force is applied, or the outlet may tear. It may be stored away. The basis weight of the heat seal layer is preferably within the range of 50 g/m ² or less, more preferably 5 g/m ² or more and 35 g/m ² or less, even more preferably 10 g/m ² or more and 20 g/m ² or less, It is also possible to achieve both ease of opening and resistance to tearing when opening the ejection port.

The basis weight of the heat seal layer can be determined, for example, as follows.
First, a 0.1M acetic acid aqueous solution and a 0.1M sodium acetate aqueous solution are prepared. About 830 g of a 0.1M aqueous acetic acid solution and about 160 g of a 0.1M aqueous sodium acetate solution are mixed to have a pH of 4, and this is used as an acetate buffer. Cellulase Onozuka p1500 (manufactured by Yakult Pharmaceutical Co., Ltd.) is added to this acetate buffer in an amount of 1% by weight.
50 ml of acetate buffer to which Cellulase Onozuka p1500 has been added and 0.5 g of packaging base material 10 (paper base material on which a heat-sealing layer is formed) are placed in a vial, and the vial is tightly capped. Next, after shaking at 180 rpm and 40° C. for 24 hours, the heat seal layer is collected from the vial, and the mass of the heat seal layer portion is measured. The basis weight of the heat seal layer is calculated 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 sampled heat seal layer using the following formula.
Basis weight of heat seal layer =
Basis weight of packaging base material 10 x (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 may be formed on the entire surface of the paper base material or the heat seal layer formed on the paper base material, or may be formed on a part of the surface. For example, it may be formed only in the portion where paper base materials are laminated and joined. The position and size of the adhesive layer on the surface of the paper base material, and the proportion occupied by the adhesive layer can be set as appropriate.

The adhesive constituting the adhesive layer is not particularly limited, and any known adhesive can be used. For example, ethylene adhesive, two-component curable urethane adhesive, polyester urethane adhesive, polyether Urethane adhesives, acrylic adhesives, styrene-acrylic adhesives, polyester adhesives, polyamide adhesives, polyvinyl acetate adhesives, epoxy adhesives, rubber adhesives, etc. can be used. . Among these, styrene-acrylic adhesives are preferred.

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

The basis weight of the adhesive layer (dry application amount of 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. More preferably, it is 20 g/m ² or less.
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 according to JIS P 8124 before providing the adhesive layer.
Basis weight of adhesive layer = Basis weight of packaging base material 10 - Basis weight of paper base material

As mentioned above, in the packaging base material 10 of the present invention, the sealing layer is preferably a heat-sealing layer and/or an adhesive layer, but usually, the heat-sealing layer, particularly the polyolefin resin, is preferable to the adhesive layer. A heat-sealing layer containing polyolefin resin has superior adhesive properties, and it may be easier to package the paper product 11 by providing a heat-sealing layer, preferably a heat-sealing layer containing a polyolefin resin.

(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 seal 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, and a light shielding layer. These other layers can be provided, for example, between the paper base material and the sealing layer or on the top 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 By covering the entire paper product 11 with one packaging base material 10, the packaging base material 10 has two sides: the side that comes into contact with the paper product 11 and the side that does not come into contact with the paper product 11. There will be a face. At this time, the PPS smoothness of the surface in contact with the paper product 11 is 1.5 μm or more and 4.3 μm or less, preferably 1.7 μm or more and 3.5 μm or less, and 2.0 μm or more and 2.8 μm or less. It is more preferable that there be. Further, the PPS smoothness of the side not in contact with the paper product 11 is preferably 3 μm or more and 12 μm or less, more preferably 4.2 μm or more and 10.5 μm or less, and 5.5 μm or more and 9.0 μm or less. It is more preferable that The lower the value of PPS smoothness, the smoother it is, and in a package in which the root mean square height Sq of the surface of the seal portion is less than 30 μm, as in the present application, the PPS smoothness of the surface in contact with the paper product 11 is If the smoothness of the PPS on the side not in contact with the paper product 11 is less than 1.5 μm, or the PPS smoothness of the side not in contact with the paper product 11 is less than 3 μm, the packaging base material 10 will be difficult to bend at a predetermined position because it will be too smooth. Poor packaging style. In addition, if the PPS smoothness of the surface in contact with the paper product 11 exceeds 4.3 μm or the PPS smoothness of the surface not in contact with the paper product 11 exceeds 12 μm, the adhesiveness of the seal portion 12 will be poor. . By setting the PPS smoothness on both sides of the packaging base material 10 within the above range, the adhesiveness of the seal portion 12 can be made good, and a package 1 having an excellent shape after packaging can be obtained. The PPS smoothness of each surface of the packaging base material 10 can be measured in accordance with JIS P 8151:2004.

Further, in the packaging base material 10, the Oken type smoothness of the surface in contact with the paper product 11 is preferably 35 seconds or more and 1500 seconds or less, more preferably 150 seconds or more and 1300 seconds or less, and 500 seconds or more and 1300 seconds or less. It is more preferable that the time is not less than 1100 seconds. Further, the Oken type smoothness of the surface not in contact with the paper product 11 is preferably 6 seconds or more and 80 seconds or less, more preferably 10 seconds or more and 60 seconds or less, and 15 seconds or more and 40 seconds or less. It is more preferable that The higher the Oken type smoothness, the smoother the surface of the surface in contact with the paper product 11 in a package in which the root mean square height Sq of the surface of the seal portion is less than 30 μm, as in the present application. If the Oken type smoothness is less than 35 seconds, or if the Oken type smoothness of the side not in contact with the paper product 11 is less than 6 seconds, the adhesiveness of the seal portion 12 will be poor. In addition, if the Oken type smoothness of the side that is in contact with the paper product 11 exceeds 1500 seconds, or the Oken type smoothness of the side that does not come into contact with the paper product 11 exceeds 80 seconds, the surface will be too smooth and the packaging will be too smooth. The base material 10 is difficult to bend at a predetermined position, and the packaging form of the package 1 is inferior. By setting the PPS smoothness on both sides of the packaging base material 10 within the above range, the adhesiveness of the seal portion 12 can be made good, and a package 1 having an excellent shape after packaging can be obtained. The Oken type smoothness of each surface of the packaging base material 10 can be measured in accordance with JIS P 8155:2010.
Note that the surface of the packaging base material 10 that is in contact with the paper product 11 refers to the surface on which the sealing layer is formed. Therefore, the PPS smoothness and Oken type smoothness of the packaging base material 10 can be adjusted with a calendar, but if the PPS smoothness and Oken type smoothness of the paper base material itself are good, the sealing layer can be adjusted. The PPS smoothness and Oken type smoothness of the packaging base material 10 after being provided also tend to be good.

As will be described later, there are various packaging formats for the package 1 according to the present invention, including a case where the paper product 11 is wrapped from the production line direction (conveyance direction; MD direction), and a case where the paper product 11 is wrapped in the width direction (orthogonal to the production line direction). In some cases, the paper product 11 is wrapped from the CD 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 from 2.0 kN/m to 8.0 kN/m, and from 2.5 kN/m to 6.5 kN/m. It is more preferable that it is below m, and it is still more preferable that it is 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 preferable that it is below m, and it is still more preferable that it is 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 adhesiveness of the seal portion 12 can be made good, and a package 1 having an excellent shape after packaging can be obtained. The tensile strength of the packaging base material 10 can be measured in accordance with JIS P 8113.

When wrapping the paper product 11 from the MD direction, the elongation at break in the MD direction of the packaging base material 10 is preferably 0.8% or more and 2.4% or less, and 1.0% or more and 2.1% or less. It is more preferably 1.2% or more and 1.8% or less. When wrapping the paper product 11 from the CD direction, the elongation at break in the CD direction of the packaging base material 10 is preferably 3.0% or more and 7.0% or less, and 3.5% or more and 6.7% or less. It is more preferably 4.0% or more and 6.0% or less. By controlling the elongation at break in the MD direction or the CD direction of the packaging base material 10 within the above range, the adhesiveness of the seal portion 12 can be made good, and a package 1 with excellent shape after packaging can be obtained. The elongation at break of the packaging base material 10 can be measured in accordance with 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 300 mN or more and 1600 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 even 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 400 mN or more and 3000 mN or less, more preferably 700 mN or more and 2300 mN or less, and 900 mN or more and 1500 mN or less. is even more preferable. By setting the tear strength of the packaging base material 10 in the MD direction or the CD direction within the above range, the adhesiveness of the seal portion 12 can be made good, and a package 1 having an excellent shape after packaging can be obtained. The tear strength of the packaging base material 10 can be measured in accordance with JIS P 8116.

The bursting 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 even more preferably 150 kPa or more and 220 kPa or less. By setting the bursting strength of the packaging base material 10 within the above range, the adhesiveness of the seal portion 12 can be made good, and a package 1 having an excellent shape after packaging can be obtained. The bursting strength of the packaging base material 10 can be measured in accordance with 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·m. It is more preferable that it is not less than m and not more than 170 μN·m. 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. , more preferably 20 μN·m or more and 65 μN·m or less. When the bending stiffness of the packaging base material 10 in the MD direction or the CD direction is within the above range, the adhesiveness of the seal portion 12 can be made good, and the packaging body 1 can be obtained which has an excellent shape after packaging. Moreover, it becomes easier to achieve the required flexibility and softness of the packaging base material 10. The bending stiffness of the packaging base material 10 can be measured in accordance with ISO 2493. Note that the bending stiffness is strongest when the load is applied in the long axis direction of the fibers, so if 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 base material 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 even more preferably 68 μm or more and 90 μm or less. When the thickness of the packaging base material 10 is within the above range, the adhesiveness of the seal portion 12 can be made good, and the packaging body 1 can be obtained which has an excellent shape after packaging. The thickness of the packaging base material 10 can be measured in accordance with JIS P 8118:1998. Note that the pressure condition on the pressurizing surface was 100 kPa.

The density of the packaging base material 10 is preferably 0.60 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 More preferably, it is .70 g/cm ³ or more and 0.85 g/cm ³ or less. By having the density of the packaging base material 10 within the above range, the adhesiveness of the seal portion 12 can be made good, and a package 1 having an excellent shape after packaging can be obtained. Moreover, the required strength, flexibility, 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 the 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 0.07 g/cm ³ or more .25 g/cm ³ or less is more preferable, and 0.10 g/cm ³ or more and 0.20 g/cm ³ or less is even more preferable. Since the density of the tissue paper laminate is within the above range, when the tissue paper laminate is packaged using the packaging base material 10 of the present invention, the adhesiveness of the seal portion 12 is good, and the shape after packaging is improved. A packaging body 1 having excellent properties can be obtained, and the paper product 11 can be easily packaged. Note that the density of the tissue paper laminate is measured as follows. First, a tissue paper laminate is taken from the package 1, and the mass of the tissue paper laminate is measured using an electronic balance after conditioning the humidity at 23° C. and 50%. Thereafter, the size (width, depth, height (length of paper product 11)) of the tissue paper laminate is measured using a ruler, and the density is calculated using 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. Paper Product Regarding the paper product 11 packaged by the packaging body 1 of the present invention, the packaging body 1 of the present invention can be particularly suitably applied to packaging soft paper products such as tissue paper. The packaging body 1 of the present invention is particularly suitable for packaging laminated thin paper such as tissue paper, wipes, wet tissues, and paper hand towels.

Note that when the thin paper is tissue paper, it is preferably two-ply. In addition, 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. More preferably, it is 16 g/m ² or less. Further, the paper thickness of 5 sets (10 sheets) of 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 sheets. It is more preferable that it is 0.6 mm/10 sheets or more and 0.9 mm/10 sheets or less. By setting the basis weight and paper thickness within the above numerical ranges, the density of the laminate can be set within an appropriate range, and the adhesiveness of the sealing part 12 can be made to be good when packaged with the packaging base material 10. Thus, it is possible to obtain a package 1 having an excellent shape after packaging.
Note that the basis weight per ply can be measured and calculated in accordance with JIS P 8124. Further, the paper thickness is measured using a thickness gauge (dial thickness gauge "PEACOCK" manufactured by Ozaki Seisakusho Co., Ltd.). The measurement conditions are a measurement load of 3.7 kPa and a measuring tip diameter of 30 mm.The sample is placed between the measuring tip and the measuring stand, and the gauge is read when the measuring tip is lowered at a speed of 1 mm or less per second. Further, the measurement is repeated 10 times and the measurement results are averaged.

Furthermore, when the thin paper is tissue paper, the longitudinal tensile strength when dry per 2 plies 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/25 mm. It is more preferably the following, and even more preferably 2.9 N/25 mm or more and 4.0 N/25 mm or less. Further, the lateral tensile strength when dry per two 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. , more preferably 1.0 N/25 mm or more and 1.9 N/25 mm or less. By setting the tensile strength in the vertical and horizontal directions during drying within the above numerical range, the density of the laminate can be adjusted to an appropriate range, and when it is packaged with the packaging base material 10, the sealing part 12 It is possible to obtain a package 1 with good adhesiveness and excellent shape after packaging.
Note that both the tensile strength in the vertical direction and the horizontal direction when dry can be measured and calculated in accordance with JIS P 8113.
Further, the above-mentioned measurements of basis weight, paper thickness, and tensile strength are performed after maintaining the paper in an equilibrium state under the temperature and humidity conditions specified in JIS P 8111 (23±1° C., 50±2% RH).

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

Pillow packaging is a sheet-shaped packaging base material that is placed on top or bottom of the packaging material, and the packaging base material is overlapped with its inner surfaces at both ends in the width direction so as to wrap the packaged item in a cylindrical shape. The combined parts are formed into a cylindrical shape by heat sealing, etc., and the bottom part or mouth part is sealed horizontally by heat sealing etc. according to the length (height) of the bag. This is a packaging format in which each bag is cut at this sealed part. This pillow packaging can be performed using known equipment.
Pillow packaging is divided into two types: vertical pillow packaging, in which the packaging material is sent vertically and the item to be packaged is filled from above, and horizontal pillow packaging, in which the packaging material is sent horizontally to wrap the item. There is. When wrapping tissue paper, horizontal pillow packaging is preferred from the viewpoint of packaging speed and the form of the tissue paper.

Gusset packaging is a process in which the packaging base material is overlapped with its inner surfaces at both ends in the width direction so that the packaged item placed on or below the sheet-like packaging base material is wrapped in a cylindrical shape. The combined parts are heat-sealed to form a cylindrical shape, and both ends of the bottom part or mouth part are woven inside to create a gusset according to the length (height) of the bag. It is a packaging format in which the bag is sealed with a heat seal or the like, and each bag is cut at the sealed part. This gusset packaging can be performed using known equipment.

In a certain embodiment, when using the packaging base material 10 having a bending stiffness in the MD direction of 20 μN·m or more and 330 μN·m or less, the packaging body 1 of the present invention can be configured, for example, by using 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 while being wrapped from the transport direction (manufacturing line direction; MD direction), and cut into a predetermined size from the width direction (CD direction) perpendicular to the transport direction. In other words, when the wrapping direction is the MD direction of the packaging base material 10, it is particularly suitably applied. Note that the paper product 11 may be placed after cutting the packaging base material 10 into a predetermined size, or the packaging base material 10 may be cut into a predetermined size after the paper product 11 is placed.

In another embodiment, for example, when using a packaging base material 10 having a bending stiffness of 8 μN·m or more and 145 μN·m or less in the CD direction, the packaging body 1 of the present invention can be configured such that the packaging base material 10 is When wrapping the paper product 11 in the width direction (CD direction) perpendicular to the conveyance direction (manufacturing line direction; MD direction) after placing the paper product 11, in other words, the wrapping direction is This is particularly suitably 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 preferred. In this case as well, the paper product 11 may be placed after cutting the packaging base material 10 into a predetermined size, or the packaging base material 10 may be cut into a predetermined size after the paper product 11 is placed. good.

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 embodiments and examples. It will be apparent to those skilled in the art that various changes or improvements can be made to the embodiments described above. Furthermore, it is clear from the claims that forms with such changes or improvements may also be included within the technical scope of the present invention.

Hereinafter, the present invention will be described in detail by giving examples. Note that the present invention is not limited to the examples shown below.

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

(Basic weight of packaging base material)
The basis weight A of the packaging base material was measured in accordance with JIS P 8124.

(Basic weight of paper base material and basis weight of heat seal layer)
First, a 0.1M acetic acid aqueous solution and a 0.1M sodium acetate aqueous solution were prepared. About 830 g of 0.1M aqueous acetic acid solution and about 160 g of 0.1M aqueous sodium acetate solution were mixed to have a pH of 4, and this was used as an acetate buffer. Cellulase Onozuka p1500 (manufactured by Yakult Pharmaceutical Co., Ltd.) was added to this acetate buffer in an amount of 1% by weight.
50 ml of acetate buffer to which Cellulase Onozuka p1500 had been added and 0.5 g of a packaging base material (paper base material on which a heat-sealing layer was formed) were placed in a vial, and the vial was tightly capped. Next, after shaking at 180 rpm and 40° C. for 24 hours, the heat seal layer was collected from the vial, and the mass of the heat seal 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 sampled heat seal layer, calculate the basis weight of the paper base material and the basis weight of the heat seal layer using the following formula. was calculated.
Basis weight of paper base =
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)

(Basic weight of adhesive layer (adhesive application amount))
From the basis weight of the packaging base material determined as above and the basis weight of the paper base material measured in accordance with JIS P 8124 before providing the adhesive layer, calculate the basis weight of the adhesive layer using 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 lifting paper thickness meter standard model TM-600 (manufactured by Kumagai Riki Kogyo Co., Ltd.). The pressure condition of the pressurized surface was 100 kPa.

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

(PPS smoothness of each side of packaging base material)
The PPS smoothness of each surface of the packaging base material was measured and calculated in accordance with JIS P 8151:2004.

(Oken type smoothness of each side of packaging base material)
The Oken type smoothness of each surface of the packaging base material was measured and calculated in accordance with JIS P 8155:2010.

(Tensile strength in MD direction and CD direction of packaging base material)
The tensile strength of the packaging base material in the MD direction and the CD direction was measured in accordance with JIS P 8113.

(Elongation at break in MD direction and CD direction of packaging base material)
The elongation at break in the MD direction and CD direction of the packaging base material was measured in accordance with JIS P 8113.

(Tear strength in MD direction and CD direction of packaging base material)
The tear strength in the MD direction and the CD direction of the packaging base material was measured in accordance with JIS P 8116.

(Bursting strength of packaging base material)
The bursting strength of the packaging base material was measured in accordance with JIS P 8112.

(Measurement of bending stiffness of packaging base material in MD direction and CD direction)
The bending stiffness of the packaging base material in the MD and CD directions was measured using an L&W bending tester (manufactured by Lorentzen & Wettre) in accordance with the method described in ISO 2493. For the packaging base material, the bending resistance (load) is the measured value of a test piece with a width of 38 mm and a length of 100 mm when the bending angle is 15 degrees and the bending length (span of the sample stage) is 10 mm, and the bending resistance (load) is calculated using the following formula. The bending stiffness (μN·m) was determined by
Bending stiffness (μN・m) = 60 x bending resistance (mN) x bending length 10 (mm) ² ÷ (π x bending angle 15 (°) x sample width 38 (mm))
Note that if a test piece with a length of 100 mm cannot be collected, the length of the test piece can be shortened. The test piece should not include perforations at the outlet, but may include perforations if necessary to ensure the size of the test piece.

(Example 1)
(Packaging base material)
A paper base material was prepared using 100% by weight of softwood unbleached kraft pulp (NUKP) as a pulp raw material. Then, a polyethylene layer was formed as a heat-sealing layer on the paper base material by an extrusion method to produce a packaging base material. The basis weight of the produced packaging base material, the basis weight of the paper base material, the basis weight of the heat seal layer, the thickness, density, PPS smoothness and Oken type smoothness of each surface, MD direction and Table 1 shows the results of measuring tensile strength in the CD direction, elongation at break in the MD and CD directions, bursting strength, bending stiffness in the MD and CD directions, and tear strength in the MD and CD directions.

(Tissue paper packaging (gusset packaging))
Using the produced packaging base material, a package with a size of 18 cm in the MD direction of the packaging base material x 11 cm in the CD direction of the packaging base material x 5 cm in height was produced. Then, 50 pairs of 2-ply tissue paper as a paper product were placed in this package and sealed using gusset packaging to obtain a tissue paper package. The paper product was wrapped while being wrapped from the CD direction. Moreover, the tissue paper package had three seal parts.
Then, the root mean square height Sq of the surface of the seal portion was measured using the measurement method described above. The root mean square height Sq is determined by measuring the root mean square heights of the surfaces of two seal parts that are formed in a substantially straight line at both ends and in such a way that the seal parts are substantially parallel to each other at four locations in total. was taken as the average.

(Adhesiveness of seal part and form after packaging)
For the fabricated tissue paper packaging, 30 people monitored the adhesion of the sealed part (whether the sealed part is properly adhered) and the form after packaging (the cosmetic appearance of the packaging) when the packaging base material was opened from the sealed part. It was evaluated by The evaluation criteria are as follows.
A: People who felt that the adhesion of the sealing part was weak and/or the base material was not bent at the specified position, resulting in inferior cosmetic properties 0 to 1 people B: The adhesion of the sealing part was weak and/or the base material was not bent at the specified position 2 to 3 people C: The adhesion of the seal part was weak and/or the base material was not bent at the specified position, and felt that the cosmetic performance was poor. People 4 to 6 people D: People who felt that the adhesion of the seal part was weak and/or the base material was not bent at the specified position, resulting in poor cosmetic performance. 7 to 15 people E: The adhesion of the seal part was weak and/or Or, 16 to 30 people felt that the base material was not bent at the specified position and the cosmetic properties were poor.

(Difficulty in damaging the seal part)
Two identical tissue paper packages were made, and their sealed portions were rubbed against each other, and it was visually confirmed whether the surface of the packaging base material forming the sealed portion was damaged. The evaluation was done by 30 monitors, and if the number of people who felt vulnerable was 5 or less, it was rated ○, and if 6 or more people felt it was bad, it was rated ×.

(Example 2) - (Example 12), (Comparative example 1) - (Comparative example 5)
In Examples 2 to 12 and Comparative Examples 1 to 5, packaging base materials having the physical properties shown in Table 1 were prepared in the same manner as in Example 1, and using this, tissue paper packages were prepared in the same manner as in Example 1. (gusset packaging) was prepared and the adhesiveness of the sealed portion was evaluated. However, in Example 10, instead of providing a polyethylene layer as a heat seal layer on the paper base material, a styrene-acrylic adhesive layer (adhesive coating amount: 10.8 g/m ² ) was provided. Furthermore, in Example 11, 26 sets of 2-ply tissue paper were used as the paper product, and in Example 12, 72 sets of 2-ply tissue paper were used as the paper product to produce a tissue paper package. In addition, regarding Comparative Example 5, a pattern with unevenness was provided for the pattern of the seal portion.

As is clear from the results shown in Table 1, the packages of Examples 1 to 12 were all excellent in the adhesiveness of the seal portion and the form after packaging, and the seal portion was also difficult to damage the packages. On the other hand, Comparative Examples 1 to 4 were all inferior in the adhesiveness of the seal portion and the form after packaging, and in Comparative Example 5, the package was easily damaged by the seal portion.
Therefore, even when the packaging body of the present invention has a sealing part with a pattern without irregularities, it is possible to provide a packaging body for paper products in which the sealing part is hard to be damaged, has good adhesive properties, and has an excellent shape after packaging. can do.

1 Packaging body 10 Packaging base material 11 Paper product (packaged item)
12 Seal part

Claims (11)

A packaging in which one or more paper products are entirely covered with a packaging base material, the paper products are sealed by at least one sealing part, and the root mean square height Sq of the surface of the sealing part is less than 30 μm. The body,
The packaging base material includes at least a paper base material and a sealing layer,
The packaging base material has a basis weight of 35 g/m ² or more and 105 g/m ² or less,
The seal portion is provided at an end where the packaging base materials overlap,
A packaging body for paper products, characterized in that, in the packaging base material, the PPS smoothness of the surface on the side in contact with the paper product is 1.5 μm or more and 4.3 μm or less. The packaging body for paper products according to claim 1, wherein the surface of the packaging base material in contact with the paper product has an Oken type smoothness of 35 seconds or more and 1500 seconds or less. 3. The paper product packaging body according to claim 1, wherein the packaging base material has a PPS smoothness of 3 μm or more and 12 μm or less on the side that does not come into contact with the paper product. 4. The packaging base material according to any one of claims 1 to 3, wherein the Oken type smoothness of the side not in contact with the paper product is 6 seconds or more and 80 seconds or less. Packaging for paper products. The packaging body for paper products according to any one of claims 1 to 4, wherein the packaging base material has a bending stiffness in the MD direction of 20 μN·m or more and 330 μN·m or less. The packaging body for paper products according to any one of claims 1 to 5, wherein the packaging base material has a bending stiffness in the CD direction of 8 μN·m or more and 145 μN·m or less. The packaging body for paper products according to any one of claims 1 to 6, wherein the sealing layer is a heat sealing layer and/or an adhesive layer. The paper product packaging according to claim 7, wherein the heat seal layer contains a polyolefin resin. The packaging body for a paper product according to any one of claims 1 to 8, wherein the paper product is thin paper. The paper product packaging according to claim 9, wherein the thin paper is a laminated thin paper. The paper product packaging body according to any one of claims 1 to 10, wherein the packaging body is a gusset packaging or a pillow packaging.

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