JP2023032678A - Package of sanitary tissue product - Google Patents

Abstract

To provide a package of sanitary tissue products that reduces plastic use and also prevents a handle thereof from falling off unexpectedly.SOLUTION: The package of sanitary tissue products includes: a package body that is formed of laminated paper where a first heat seal layer is laminated on a paper substrate as a base material, and packages multiple sanitary tissue products together so that the first heat seal layer becomes an outer surface; and a band-like handle that is formed of laminated paper where a second heat seal layer is laminated on a paper substrate as a base material, and has both ends in a longer direction and a middle part therebetween, wherein both ends are bonded to the outer surface of the package body via the bonding between the second heat seal layer and the first heat seal layer so that the middle part faces a top surface of the package body.SELECTED DRAWING: Figure 1

Description

The present invention relates to a sanitary thin paper product package for packaging a plurality of rolled sanitary thin paper products such as toilet rolls and kitchen rolls, or laminated sanitary thin paper products such as tissue paper and wipers.

Conventionally, roll-shaped sanitary thin paper products in which sanitary thin paper such as toilet paper and kitchen paper is wound into a roll, and laminated sanitary thin paper products in which a laminate of sanitary thin paper such as tissue paper and wipers is housed in a box or bag, It is sold in a form in which multiple pieces are bundled together and wrapped in plastic film.

Patent Documents 1 to 3 disclose configurations in which this type of package is provided with a handle. In Patent Documents 1 to 3, the base material of the handle is a strip-shaped plastic film having longitudinal ends and an intermediate portion therebetween, and both ends are arranged so that the intermediate portion faces the top surface of the package body. It is joined to the side surface of the package body. As a result, the package can be easily carried by gripping the intermediate portion of the belt-shaped plastic film as a handle.

By the way, in recent years, the problem of plastic waste has become more serious worldwide, and it is desired to reduce the use of plastics in order to improve the global environment. US Pat. No. 5,300,002 proposes reducing the use of plastics by using a packaging substrate comprising a paper substrate in a package for packaging one or more paper products.

JP 2005-153959 A JP 2010-275011 A JP 2015-101388 A Japanese Unexamined Patent Application Publication No. 2021-70501

In order to reduce the use of plastic, it is conceivable to use a handle base material including a paper base material for the handle as well.

However, when a handle base material containing a paper base material is used, both the packaging base material and the handle base material are made of plastic for joining the packaging base material containing the paper base material and the handle base material containing the paper base material. The joining method for films cannot be simply applied as it is. If sufficient bonding strength cannot be obtained between the packaging base material and the handle base material, the handle may inadvertently come off the package body when the package is lifted or carried. be.

The present invention provides a sanitary thin paper product in which the use of plastic is reduced and sufficient joint strength is obtained between the handle and the packaging body to prevent the handle from being accidentally removed during carrying. The purpose is to provide a package of

As a result of intensive studies to solve the above problems, the present inventors have found a package body having a laminated paper base material in which a first heat seal layer is laminated on a paper base material, A package body in which a plurality of sanitary thin paper products are packaged together so that one heat seal layer is on the outer surface, and a laminated paper in which a second heat seal layer is laminated on a paper base material are used as base materials, A strip-shaped handle having both ends in the longitudinal direction and an intermediate portion therebetween, wherein both ends are bonded to the second heat seal layer and the first heat seal so that the intermediate portion faces the top surface of the package body. It has now been found that the above problems can be solved by a package for sanitary tissue paper products having a handle joined to said outer surface of the package body via a bond with a layer.

Specifically, the present invention has the following configurations.
[1] A package main body made of laminated paper in which a first heat-seal layer is laminated on a paper base material, and a plurality of sanitary thin paper products are arranged so that the first heat-seal layer is on the outer surface. and a strip-shaped handle having both ends in the longitudinal direction and an intermediate portion between them, using a laminated paper in which a second heat seal layer is laminated on a paper base material as a base material. Both ends are joined to the outer surface of the package body via the joining of the second heat-seal layer and the first heat-seal layer so that the middle part faces the top surface of the package body. A package for sanitary tissue paper products, comprising: a hand;
[2] The package for sanitary thin paper products according to [1], wherein the first heat-seal layer is used for sealing the body of the package.
[3] The package for sanitary thin paper products according to [1] or [2], characterized in that both ends of the handle are joined to the side surfaces of the package body that are connected to the top surface.
[4] The MD direction of the paper base material of the package body is the height direction of the package body, and the MD direction of the paper base material of the handle is configured to be the longitudinal direction of the handle. A sanitary tissue paper product package according to [3].

According to the present invention, in a packaging body for collectively packaging a plurality of sanitary thin paper products, the use of plastic is reduced, and a sufficient joint strength is obtained between the handle and the packaging body for carrying. It is possible to provide a packaging body for sanitary thin paper products in which a handle is prevented from being carelessly removed.

1 is a schematic perspective view showing a packaging body for sanitary thin paper products according to an embodiment of the present invention; FIG. 1 is a schematic perspective view showing a packaging body for sanitary thin paper products according to an embodiment of the present invention; FIG.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. They are provided for illustrative purposes and are not intended to limit the invention.

(First embodiment)
[Package]
1 and 2 are schematic perspective views of packages for satellite tissue products, respectively, according to embodiments of the present invention. The package 1 includes a package body 10 for collectively packaging a plurality of sanitary thin paper products, and a handle 20 joined to the outer surface of the package body 10 .

[Sanitary tissue paper products]
Examples of sanitary thin paper products to be packaged in the package of the present invention include roll-shaped sanitary thin paper products obtained by winding sanitary thin paper such as toilet paper and kitchen paper into a roll, and sanitary thin paper products such as tissue paper and wipers. Laminated sanitary tissue paper products in which the body is contained in a box or bag can be mentioned.

A package 1 shown in FIG. 1 contains five boxes of boxed tissue paper as a plurality of laminated sanitary thin paper products. In addition, two rolls of toilet rolls (rolled toilet paper) are packaged in the package 1 shown in FIG. 2 as a plurality of rolled sanitary thin paper products.

The number of sanitary thin paper products packaged in the package 1 depends on the ease of carrying due to the size and weight of the package main body 10 and the sanitary thin paper products, the weight, and the base materials 16 and 26 of the package main body 10 and the handle 20. It may be determined by the relationship between strength and bonding strength, product sales strategy, and the like. The package 1 may contain, for example, 2 to 5 boxes of laminated sanitary tissue products, or 2 to 8 rolls of rolled sanitary tissue products.

[Package body]
The package main body 10 uses laminated paper 16 as a base material, in which a heat seal layer (first heat seal layer) 14 is laminated on a paper base material 12 . As shown in FIG. 1, the package main body 10 packages an object to be packaged such that the heat seal layer 14 of the laminated paper 16 is on the outer surface of the package main body 10 . In the example of FIG. 1, the items to be packaged are five boxes of sanitary thin paper products stacked vertically with the top and bottom faces facing each other. The package main body 10 has a bottom surface, a top surface facing the bottom surface, and side surfaces (peripheral surfaces) connected to the bottom surface and the top surface. there is

[handle]
The handle 20 is based on laminated paper 26 in which a heat-seal layer (second heat-seal layer) 24 is laminated on a paper base 22 . The handle 20 is strip-shaped and has longitudinal ends and an intermediate portion therebetween. The heat-seal layers (second heat-seal layers) 24 on both ends of the handle 20 serve as joint surfaces with the heat-seal layers (first heat-seal layers) 14 on the outer surface of the package body 10 .

[Joining the handle and package body]
The handle 20 is attached to the package body 10 so that both ends of the handle 20 are joined to the outer surface of the package body 10 and the middle part of the handle 20 is not joined to the outer surface of the package body 10. It is arranged so as to face the top surface of the main body 10 .

In the embodiment of the present invention, the handle 20 and the package main body 10 are heat-sealed (heat-sealed) between heat-sealed layers (first heat-sealed layer and second heat-sealed layer) 14, 24. spliced. A known heat sealer can be used for the heat sealing treatment. In the heat sealing process, heat and pressure are applied to the joint area between the handle 20 and the package main body 10, and the heat-sealable materials of the heat-sealing layers 14, 24 facing each other are softened and melted. . In this embodiment, both the laminated papers 26 and 16 to be joined have a heat-seal layer having a heat-sealable material on their contacting surfaces. Micro-bite and mixed integration occur, and strong bonding is obtained.

[Laminated paper]
In the present specification, the term "laminate" refers to a configuration in which thin layers are laminated and integrated. The laminated papers 16,26 include paper substrates 12,22 and heat seal layers 14,24, the heat seal layers 14,24 being laminated on the paper substrates 12,22 and overlapping the paper substrates 12,22. are integrated.

[Paper substrate]
The paper substrates 12, 22 are obtained by papermaking techniques known in the art, using pulp as the main raw material. The paper substrates 12 and 22 can be manufactured, for example, by using a paper machine to make paper from slurry containing pulp components. As the paper machine, a known paper machine such as a twin-wire former system, a cylinder former system, a suction press former system, a crescent former system, or the like may be used. The paper substrate that has been made into paper may be subjected to a drying treatment using a Yankee dryer, a smoothing treatment using a calender, or the like.

[pulp]
The pulp component that is the main raw material of the paper substrates 12 and 22 includes waste paper pulp such as wood pulp, non-wood pulp, and deinked pulp.

Examples of wood pulp include hardwood pulp (hardwood kraft pulp (LKP)), softwood pulp (softwood kraft pulp (NKP)), sulfite pulp (SP), dissolving pulp (DP), soda pulp (AP), and unbleached kraft pulp. Pulp (UKP), chemical pulp such as oxygen-bleached kraft pulp (OKP), and the like. Semi-chemical pulp (SCP), semi-chemical pulp such as chemigroundwood pulp (CGP), mechanical pulp such as ground wood pulp (GP) and thermomechanical pulp (TMP, BCTMP) are also included, but are not particularly limited.

Examples of non-wood pulp include, but are not limited to, cotton pulp such as cotton linters and cotton lint, non-wood pulp such as hemp, straw, and bagasse, and cellulose, chitin, and chitosan isolated from sea squirts, seaweed, and the like. .

Waste paper pulp includes deinked pulp made from waste paper, but is not particularly limited. For example, newspapers, leaflets, rough paper magazines, coated magazines, thermosensitive recording paper, pressure sensitive recording paper, imitation paper, color fine paper, copy paper, computer output paper, or mixed waste paper that is any combination of these and conventionally known waste paper pulp.

The pulp component may be used alone or in combination of two or more. Since these pulp components greatly affect the quality of the paper substrate, they are appropriately blended in predetermined types and blending ratios according to the required quality.

For example, softwood kraft pulp (NKP) and/or hardwood kraft pulp (NKP), preferably 50-100:50-0, more preferably 70-100:30-0, even more preferably 90-100:10-0 may be used at a blending ratio (% by mass) of

When the blending ratio of the softwood kraft pulp is high, the tensile strength in the machine direction (MD direction) of the obtained paper substrate is generally improved, and inadvertent breakage is less likely to occur when force is applied in the MD direction. . Therefore, by using the laminated papers 16, 26 in such an orientation that the MD direction of the paper substrates 12, 22 is aligned with the direction in which the force is likely to act in the package 1, the easiness of breakage of the package 1 is prevented. can.

[Optional component]
Various commonly used chemicals may be added to the paper base materials 12 and 22 as optional components for the required quality and stable operation during manufacturing. Examples of optional components include dry paper strength agents, wet paper strength agents, softeners, bulking agents, dyes, fragrances, dispersants, drainage improvers, pitch control agents, retention improvers and the like.

Examples of dry paper strength agents include cationized starch, polyacrylamide (PAM), carboxymethylcellulose (CMC) and the like. As the wet paper strength agent, it can be used by selecting from known ones that are usually used. Examples thereof include polyamide/polyamine resins, polyacrylamide resins, melamine resins, and particularly polyamide epichlorohydrin, urea, melamine, and thermally crosslinkable polyacrylamide. Examples of softening agents include anionic surfactants, nonionic surfactants, and cationic surfactants. One of the above optional components may be used alone, or two or more thereof may be used in combination.

The paper base material 12 of the package main body 10 and the paper base material 22 of the handle 20 may be the same or different.

[Glassine paper]
Glassine paper, for example, can be preferably used as the paper base material 12 of the package main body 10 . Glassine paper is manufactured by applying heat and pressure to the base paper ^{, which} is made by highly beating chemical pulp, through a calender to crush the gaps between fibers. It is thin paper. Glassine paper is smooth, glossy, dense, and highly air permeable (i.e., it takes a long time for a given amount of air to pass through a given area of the paper under a given pressure, in other words Then, it has properties such as low air permeability and semi-transparency.

By using glassine paper for the paper base material 12 of the package main body 10, there are the following advantages, for example.
(1) From the appearance of the package 1, the sanitary thin paper products packaged in the package body 10 can be easily identified through the transparent or translucent heat seal layer 14 and the translucent glassine paper. In addition, the characters and figures printed on the surface of the glassine paper that forms the inner surface of the package main body 10 can be seen from the outside of the package main body 10 .
(2) Since the glassine paper has a high air permeability, the sanitary thin paper products, which are the items to be packaged in the package main body 10, are less susceptible to external moisture.

[Pure white paper]
As the paper base material 22 of the handle 20, for example, pure white paper can be preferably used. Pure white paper has one side with a high degree of smoothness and is glossy, and the other side has a low degree of smoothness and is rough and non-glossy. It is thin paper with an amount of about 30 g/m ² to 65 g/m ² . Pure white paper has properties such as high paper strength and excellent printability. Pure white paper can be produced using a Yankee machine (cylinder paper machine).

By using pure white paper as the paper base material 22 of the handle 20, there are the following advantages, for example.
(1) Since the paper base material 22 is strong, the handle 20 is hard to tear.
(2) The glossy surface of the paper base material 22 is glossy and has a high degree of whiteness.
(3) Since the non-glossy surface of the paper base material 22 has many surface irregularities, by laminating the heat seal layer 24 on the non-glossy surface, the material constituting the heat seal layer 24 enters into the surface irregularities of the paper base material 22. An anchoring effect is generated in which a fitting state occurs at , and a high adhesive strength is obtained between the paper substrate 22 and the heat seal layer 24 . Therefore, peeling between the paper substrate 22 and the heat seal layer 24 is prevented when a tensile force is applied to the handle 20 when the package 1 is carried.

[Heat seal layer]
In this example, the heat seal layers 14, 24 are provided on the entire surface of the paper substrates 12, 22 when the laminated papers 16, 26 are viewed from above. However, in the present invention, the heat-sealing layer 14 of the laminated paper 16, which is the base material of the package body 10, is provided at a portion to which the laminated paper 26, which is the base material of the handle 20, is to be joined. As long as the heat seal layer 24 of the laminated paper 26, which is the base material of the package body 10, is provided in the portion to be joined to the laminated paper 16, which is the base material of the package body 10, the heat seal layers 14, 24 may be provided only on a part of the surface of the paper base material 12, 22 instead of on the entire surface thereof. As far as this is concerned, the positions and sizes of the portions where the heat seal layers 14 and 24 are provided on the surfaces of the paper substrates 12 and 22 of the laminated papers 16 and 26, and the proportions occupied by the heat seal layers 14 and 24 are appropriately set. be able to.

When the heat seal layers 14, 24 are provided on the entire surfaces of the paper substrates 12, 22, even if misalignment occurs in the packaging of the package main body 10 and attachment of the handle 20 in the manufacturing process of the package 1, bonding is possible. There is an advantage in that there is no problem in joining due to the absence of the heat seal layers 14, 24 in the part to be joined. In addition, since the heat seal layers 14 and 24 are provided on the entire surfaces of the paper substrates 12 and 22, the laminated papers 16 and 26, which are the substrates, can be , a reinforcing effect of strength is obtained.

When the heat-seal layers 14 and 24 are provided only on part of the surface of the paper substrates 12 and 22, the heat-seal layers 14 and 24 on the laminated papers 16 and 26 are more difficult to form than when they are provided on the entire surface. The proportion becomes lower and the proportion of the paper substrate 12, 22 becomes higher. Therefore, the effect of reducing the use of plastic in the laminated papers 16 and 26 can be enhanced.

[Material of heat seal layer]
Materials constituting the heat-seal layers 14 and 24 are not particularly limited, and any material exhibiting heat-sealability can be used. For example, polyolefin-based resins and other thermoplastic resins can be used, and among these, polyolefin-based resins are preferably used. 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 ethylene content of 10 mol% or less), or polypropylene resin obtained by graft polymerization or copolymerization of unsaturated carboxylic acid, unsaturated carboxylic acid anhydride, ester monomer, etc. to polypropylene, medium density polyethylene, High density polyethylene etc. are mentioned. Any one of the materials constituting the heat seal layers 14 and 24 may be used alone, or two or more thereof may be used in combination. The materials forming the heat seal layers 14, 24 may be the same or different.

The heat-seal layers 14 and 24 can be formed, for example, using a commonly used method such as those listed below.
(1) A method in which a thermoplastic resin such as a polyolefin resin or a composition containing a thermoplastic resin is formed on the paper substrates 12 and 22 by an extrusion method.
(2) A method of attaching a film made of a thermoplastic resin or a film containing a thermoplastic resin to the paper substrates 12 and 22 using a known heat-sealing device (bonding device).
(3) a water-based heat-sealing agent obtained by dissolving or dispersing a thermoplastic resin or a thermoplastic resin composition in water, or a solvent-based heat-sealing agent obtained by dissolving or dispersing a thermoplastic resin or a thermoplastic resin composition in a solvent, A method of coating on the paper base material 12, 22 by a known method such as roll coating, gravure roll coating, kiss coating, or the like.

[Basis Weight]
[Basis Weight of Laminated Paper]
The basis weight of the laminated papers 16, 26 (the total basis weight of the paper base materials 12, 22 and the heat seal layers 14, 24 constituting the laminated papers 16, 26) should be 30 g/m ² or more and 80 g/m ² or less. and more preferably 40 g/m ² or more and 70 g/m ² or less. If the basis weight of the laminated papers 16, 26 is less than 30 g/m ² , the laminated papers 16, 26 are easily torn, and if the basis weight exceeds 80 g/m ² , heat transfer becomes insufficient during the heat sealing process. In some cases, the heating temperature of the heat-sealing layer is lowered and good bonding strength cannot be obtained. The basis weight of the laminated papers 16 and 26 is measured, for example, according to the Japanese Industrial Standard JIS P8124.

[Basis weight of heat seal layer]
The basis weight of the heat-seal layer (first heat-seal layer) 14 in the laminated paper 16 that is the base material of the package body 10 is preferably 10 g/m ² or more and 20 g/m ² or less, and 12 g/m ^{2 .} More preferably, it is at least 18 g/m ² or less. Further, the basis weight of the heat seal layer (second heat seal layer) 24 in the laminated paper 26 which is the base material of the handle 20 is preferably 10 g/m ² or more and 20 g/m ² or less, and is preferably 12 g/m 2 or more and 20 g/m 2 or less. It is more preferably ² or more and 18 g/m ² or less.

By setting the basis weight of the heat-seal layers 14 and 24 to 10 g/m ² or more, strong bonding strength can be obtained by fusing the heat-sealable materials of both the heat-seal layers 14 and 24 . Further, by setting the basis weight of the heat seal layers 14, 24 to 20 g/m ² or less, the proportion of the heat seal layers 14, 24 in the laminated papers 16, 26 can be moderately suppressed, and the packaging base material and handle base material can be used. The strength of the laminated papers 16 and 26 as materials can be ensured.

The basis weight of the heat seal layers 14 and 24 is determined by, for example, the method described below, from the base material (laminated paper 16 and 26 in which the heat seal layers 14 and 24 are laminated on the paper base material 12 and 22) to the heat seal layer. It can be determined by sampling 14 and 24 and measuring the mass.

First, a 0.1 M acetic acid aqueous solution and a 0.1 M sodium acetate aqueous solution are prepared. About 830 g of 0.1 M acetic acid aqueous solution and about 160 g of 0.1 M sodium acetate aqueous solution are mixed so as to have a pH of 4, and this is used as an acetate buffer solution. Cellulase Onozuka p1500 (manufactured by Yakult Co., Ltd.) is added to this acetate buffer so that the amount added is 1% by mass.

50 ml of acetate buffer containing Cellulase Onozuka p1500 and 0.5 g of base material (laminated paper in which a heat seal layer is laminated on a paper base material) are placed in a vial and tightly capped. After shaking for 24 hours at 180 rpm and 40° C., the heat-sealed layer is collected from the vial and the mass of the heat-sealed layer portion is measured. Based on the weight (0.5 g) of the base material (laminated paper in which the heat seal layer is laminated on the paper base material) and the weight of the sampled heat seal layer, the basis weight of the heat seal layer is calculated by the following formula (I). calculate.

Basis weight of heat seal layer = Basis weight of base material x (mass of heat seal layer/mass of base material) (I)

[Basis weight of paper substrate]
The basis weight of the paper base material 12 in the laminated paper 16 that is the base material of the package main body 10 and the basis weight of the paper base material 22 in the laminated paper 26 that is the base material of the handle 20 are 20 g/m ^{2 .} It is preferably 60 g/m ² or more and more preferably 28 g/m ² or more and 52 g/m ² or less.

If the basis weight of the paper substrates 12, 22 is less than 20 g/m ² , sufficient strength may not be obtained, and the laminated papers 16, 26 may be easily torn. If the basis weight of the paper substrates 12, 22 exceeds 60 g/m ² , the suppleness and softness of the laminated papers 16, 26 are reduced, resulting in reduced workability during the formation of the package 1, and the paper thickness is increased. As a result, the heat transfer is insufficient during the heat sealing process, the heating temperature of the heat sealing layer is lowered, and good bonding strength may not be obtained.

The grammage of the paper substrates 12 and 22 can be determined as follows, for example, by applying the method for determining the grammage of the heat seal layer described above.

First, a 0.1 M acetic acid aqueous solution and a 0.1 M sodium acetate aqueous solution are prepared. About 830 g of 0.1 M acetic acid aqueous solution and about 160 g of 0.1 M sodium acetate aqueous solution are mixed so as to have a pH of 4, and this is used as an acetate buffer solution. Cellulase Onozuka p1500 (manufactured by Yakult Co., Ltd.) is added to this acetate buffer so that the amount added is 1% by mass.

50 ml of acetate buffer containing Cellulase Onozuka p1500 and 0.5 g of base material (laminated paper in which a heat seal layer is laminated on a paper base material) are placed in a vial and tightly capped. After shaking for 24 hours at 180 rpm and 40° C., the heat-sealed layer is collected from the vial and the mass of the heat-sealed layer portion is measured. Based on the weight (0.5 g) of the base material (laminated paper in which the heat seal layer is laminated on the paper base material) and the weight of the collected heat seal layer, the basis weight of the paper base material is calculated by the following formula (II). calculate.

Basis weight of paper base material = basis weight of base material x {(mass of base material - mass of heat seal layer)/mass of base material} (II)

[Packaging style]
For forming the package body 10, any known packaging form that can be wrapped so that the heat-seal layer 14 of the laminated paper 16 is the outer surface of the package body 10 can be adopted. In particular, so-called caramel packaging can be preferably employed.

[Caramel packaging]
The caramel packaging style is a packaging style known for individual packaging of soft candies such as caramel, packages for cigarette packs, and the like. Caramel packaging can be performed, for example, by a method including the steps shown below.
(1) A step of wrapping an object to be packaged (a plurality of sanitary thin paper products) with a packaging base material (laminated paper 16) of a fixed length, joining the joints, and packaging them in a cylindrical shape.
(2) Next, at both ends of the tubular packaging, the portions of the packaging base material protruding from the peripheral surface of the object to be packaged are folded together so as to form two pairs of opposing flap-shaped portions, The process of joining along the edges of the package and enclosing it.

Here, in the step (1), the step of preparing a fixed-length packaging material may be performed at any stage before, during, or after winding an object to be packaged with the packaging material. The step of preparing a fixed length packaging substrate may include cutting a long packaging substrate wound into a roll to a predetermined length.

For joining the seams in the step (1), heat seal joining using any material (heat seal layer) that exhibits heat sealability for all or part of the joints, or any adhesive (adhesion Known methods such as adhesive bonding using layers), or combinations thereof, can optionally be used as desired.

In the step (2), in the step of folding together the portions of the packaging base material protruding from the peripheral surface of the item to be packaged so as to form two pairs of opposing flap-shaped portions, folding of the formed flap-shaped portions The order does not matter. That is, one pair of opposing flap-like portions may be folded first, and then another pair of opposing flap-like portions may be folded. Alternately or in a random order, such as first folding one of a pair of opposing flap-like portions and then folding another pair of opposing flap-like portions. It's okay.

In the step (2), the portion of the packaging base material protruding from the peripheral surface of the object to be packaged is joined by folding the protruding portion along the end face of the object to be packaged, thereby joining all or part of the overlapped portion. It can be performed by a known method such as heat sealing using a heat sealing agent (heat sealing layer), adhesion using an adhesive (adhesive layer), or a combination thereof.

[Effect]
The package 1 of the first embodiment of the present invention includes a package main body 10 having a laminated paper 16 in which a first heat seal layer 14 is laminated on a paper base 12 as a base material, and a paper base 22 having a second and a handle 20 joined to the outer surface of the package body 10 having a laminated paper 26 laminated with two heat seal layers 24 as a base material, and the package body 10 and the handle 20 are attached to the respective heat seal layers 24. They are joined together via the joining of the sealing layers 14 , 24 .

In such a configuration, in the manufacturing process of the package 1, the portion where the heat seal layers 14 and 24 of the package body 10 and the handle 20 are brought into contact with each other is heated by the heat sealing process, and a heat-sealable material is applied. Phenomena such as micro-bite of the softened heat-sealable material and mixing and integration of the melted heat-sealable material on the opposing welding surfaces (facing joint surfaces) due to softening and melting and crimping can occur. As a result, a strong bond is obtained between the heat seal layers 14, 24, and sufficient bond strength is thereby obtained between the laminated papers 16, 26.

According to the configuration of this embodiment, in the packaging body 1 for collectively packaging a plurality of sanitary thin paper products, the heat seal layer 14 is formed on the paper substrates 12 and 22 instead of using conventional general plastic as the substrate. , 24 are laminated to reduce the use of plastic. In addition, since the handle 20 and the package body 10 are connected via the heat seal layers 14, 24 of both the handle 20 and the package body 10, there is sufficient space between the handle 20 and the package body 10. Thus, it is possible to provide the package 1 which has a good bonding strength and prevents the handle from being unintentionally removed when being carried.

(Second embodiment)
Next, a second embodiment of the invention will be described. Unless otherwise specified, configurations applicable to the first embodiment are applicable to this embodiment.

The second embodiment is characterized in that the first heat seal layer 14 is used for sealing the package body 10 .

In the first embodiment described above, the packaging format and forming method of the packaging body 10 have been described. Among them, in the step (1) of forming a cylindrical package, joining the seams of the cylindrical package, and folding both ends of the cylindrical package to seal the package body in the step (2) For encapsulation at both ends of the cylindrical package, heat seal bonding using any material (heat seal layer) that exhibits heat sealability to the bonded part, or using any adhesive (adhesion layer) It was mentioned that known methods such as adhesive bonding, or combinations thereof, can optionally be used.

In addition, in the above-described first embodiment, in forming the package body 10, any known known material that can be wrapped so that the heat-seal layer 14 of the laminated paper 16 is the outer surface of the package body 10 is used. It was stated that the packaging form of

When caramel packaging, which is a preferred packaging format in the present invention, is adopted as one of the packaging formats, one feature of the packaging format is that in the step (1) of forming a cylindrical package, the seams are laminated paper 16 are overlapped so that one surface and the other surface (that is, the outer surface and the inner surface) are in contact with each other. At this time, both edges of the laminated paper 16 are overlapped so that the paper base material 12 of the same laminated paper 16 is in contact with the heat seal layer 14 of the laminated paper 16 at the seam. By heat-sealing this portion by applying heat and pressure, the seam portion can be joined by the heat-seal layer 14 without separately using another heat-sealing agent (layer), adhesive (layer), or the like. Become.

In addition, when adopting caramel packaging, which is a preferred packaging format in the present invention, another feature of such packaging format is that in the step (2) of wrapping the package body, at both ends of the cylindrical package , which is folded to produce a superimposed portion. Since the heat-sealing layer 14 of the laminated paper 16 can be present in such a portion, the portion can be heat-sealed using the heat-sealing layer 14 . When the package body 10 is sealed using the heat seal layer 14, a heat sealing agent (layer) that is necessary for sealing the package body 10 and for obtaining a desired bonding strength at the sealed portion , additional materials such as adhesives (layers) can be reduced or eliminated. Therefore, according to this embodiment, it is possible to achieve a special effect of realizing low-cost production.

Therefore, in the second embodiment, when the package main body 10 is formed, a packaging form is adopted in which one surface and the other surface of the same laminated paper 16 are overlapped so that the seams of the tubular portion are in contact with each other. do. Examples of such packaging formats include, for example, caramel packaging formats.

[Effect]
In the second embodiment, when forming the package main body 10, in the configuration of the packaging format in which one surface and the other surface of the same laminated paper 16 are overlapped so that the seams of the tubular portion are in contact with each other, A heat seal layer 14 of laminated paper 16 which is a base material of the package body 10 is used for sealing the package body 10 .

According to this embodiment, by using the heat seal layer 14 of the laminated paper 16 which is the base material of the package body 10, an additional material (heat seal agents, adhesives, etc.) can be eliminated or reduced. If the elimination of the additional material is possible, not only the additional material itself for sealing, but also the additional layering/agent application steps are not required. Also, even if additional material is required for sealing, the presence of the heat-seal layer 14 of the laminated paper 16 allows the amount of additional material required to obtain the desired sealing state. can be reduced, and a special effect can be obtained that production at low cost can be realized.

In addition, as the packaging format of the package, in the process of forming a cylindrical package, the seams are overlapped so that both edges of the surface of the packaging base material, which is the inner surface of the cylindrical package, are in contact with each other (for example, , pillow packaging, gusset packaging, etc.) are also widely used. Even with such a packaging method, the heat-seal layer 14 of the laminated paper 16 used for joining the package body 10 and the handle 20 can be wrapped on the outer surface of the package body 10 . Therefore, it is possible to obtain the effect of the present invention that a sufficient bonding strength is obtained between the package main body 10 and the handle 20 joined to the package main body 10 based on such a configuration. A packaging format may be applied to the first embodiment of the present invention.

However, in such a packaging form, the heat seal layer used for sealing the package body 10 must be provided on the inner surface side of the package body. In other words, in a packaging style in which seams are overlapped so that both edges of the surface of the packaging base, which is the inner surface of the cylindrical packaging, are in contact with each other, heat sealing is used to join the package body 10 and the handle 20. In addition to the layer 14, it is necessary to separately provide optional joining means for joining seams of the tubular packaging of the package body 10. FIG. Such a form of packaging therefore does not apply to the second embodiment.

(Third embodiment)
Next, a third embodiment of the invention will be described. Unless otherwise specified, configurations applicable to the first and second embodiments are applicable to this embodiment.

1(a) to 1(c), in the present embodiment, in the package 1, both ends of the handle 20 are joined to side surfaces (peripheral surfaces) contiguous to the top surface of the package body 10. It is characterized by being Specifically, both ends of the handle 20 are joined to opposing positions on the peripheral surface of the package body 10, and an intermediate portion of the handle 20 extends across the central portion of the top surface of the package body 10. there is

Referring to FIG. 1, a handle 20 of the package 1 is used to hold the handle 20 to lift or carry the package 1. As shown in FIG. When the package 1 is carried, the package main body 10 is hung from the handle 20 via a joint surface (joint portion) between the handle 20 and the package main body 10 .

At this time, a tensile force is generated on the joint surface between the handle 20 and the package main body 10 due to the load acting in the vertical direction due to the self weight of the package main body 10 . In the present invention, the handle 20 is joined to the outer surface of the package main body 10, and the joint surface such as the top surface or the side surface does not matter. According to the 3rd Embodiment which provides, there can exist the following effects.

[Effect]
When both ends of the handle 20 are joined to the top surface of the package body 10 and the joining surface between the handle 20 and the package body 10 is provided on the top surface of the package body 10, the handle 20 and the package While the joint surface with the main body 10 is substantially horizontal, a load in the vertical direction due to the weight of the main body 10 of the package acts on the handle 20 when the package 1 is carried. Therefore, a force (peel force) acts on the joint surface between the handle 20 and the package main body 10 in a direction that tends to separate the joint, which is substantially perpendicular to the joint surface.

On the other hand, both ends of the handle 20 are joined to the side surfaces (peripheral surfaces) of the package main body 10, and joint surfaces between the handle 20 and the package main body 10 are provided on the side surfaces (peripheral surfaces) of the package main body 10. In this case, the joint surface between the handle 20 and the package main body 10 is substantially vertical. When the package 1 is carried, a load in the vertical direction due to the weight of the package body 10 acts on the handle 20, but since the direction of the joint surface and the direction in which the load acts are substantially the same, the handle 20 can be held. A force (shearing force) substantially parallel to the joint surface acts on the joint surface between the hand 20 and the package body 10 .

Therefore, both ends of the handle 20 are joined to the side surfaces (peripheral surfaces) of the package main body 10 so that the joining surface between the handle 20 and the package main body 10 is angled with respect to the top surface of the package main body 10. According to this embodiment provided on the side surface of the package main body 10, the force (peeling force) acting in the direction of tearing off the bond between the handle 20 and the package main body 10 causes the handle 20 to move from the top surface. It is relatively small compared to the case where it is provided in the case, and it is possible to further prevent the handle from inadvertently coming off when carrying.

(Fourth embodiment)
Next, a fourth embodiment of the invention will be described. Unless otherwise specified, configurations applicable to the above embodiments are applicable to this embodiment.

The fourth embodiment is a variation of the third embodiment, and in the package 1, both ends of the handle 20 are joined to the side surface (peripheral surface) connected to the top surface of the package body 10. In addition, in the package 1, the MD direction C of the paper base material 12 of the package main body 10 is the height direction of the package main body 10, and the MD direction A of the paper base material 22 of the handle 20 is It is characterized by being constructed so as to be in the longitudinal direction of the handle 20 .

[Force acting on the handle and package body]
When the package 1 is carried, a tensile force due to the weight of the package main body 10 acts on the handle 20, and the stress acts on the package main body 10 as it is suspended by the handle 20. FIG. By these forces
(1) a gripping portion of the handle 20;
(2) a joint surface (joint portion) between the handle 20 and the package main body 10;
(3) a peripheral portion of the joint surface (joint portion) between the handle 20 and the package body 10 in the package body 10;
In such a portion, troubles such as breakage due to tearing or splitting of the base materials 16 and 26 and careless detachment of the handle 20 due to peeling of bonding are likely to occur.

Regarding the above (1) "holding portion of the handle 20", in the present embodiment, the handle 20 is strip-shaped, and both longitudinal ends of the handle 20 serve as joints with the package main body 10. The intermediate portion, which is not joined with, serves as a grip portion. In this configuration, when the weight of the package main body 10 is applied to the handle 20 during carrying, etc., a tensile force acts on the gripped portion of the handle 20 in the longitudinal direction.

[Anisotropy of base material]
Here, the base material of the package main body 10 is laminated paper 16 in which the heat seal layer 14 is laminated on the paper base material 12 . The base material of the handle 20 is laminated paper 26 in which the heat seal layer 24 is laminated on the paper base material 22 .

The paper substrates 12 and 22 have raw material pulp fiber orientation resulting from the manufacturing method (papermaking). Specifically, raw pulp fibers are generally oriented in the machine direction (MD direction), which is the papermaking direction of a paper machine. As a result, the paper substrates 12 and 22 have anisotropy in strength such as tensile strength, folding endurance, tear strength, bending stiffness, and burst strength. , A will be higher than those measured in the transverse (CD) directions B, D.

The physical properties of the paper base materials 12 and 22 are reflected in the laminated paper sheets 16 and 26 in which the heat seal layers 14 and 24 are laminated on the paper base materials 12 and 22 . That is, the tensile strength measured in the machine direction (MD direction) C, A of the laminated paper 16, 26 (base material) is higher than the tensile strength measured in the transverse direction (CD direction) D, B.

Therefore, in the present embodiment, the longitudinal direction (MD direction) A of the paper base material 22 having relatively high tensile strength is the longitudinal direction of the handle 20 on which the tensile force acts due to the weight of the package body 10 itself. A band-shaped laminated paper 26 that serves as the base material of the handle 20 is provided in such a direction as to be oriented.

According to this configuration, it is possible to effectively prevent the base material 26 from being torn or torn due to carelessness at the "grip portion of the handle 20" in (1) above.

Further, regarding the above (2) “joint surface (joint portion) between the handle 20 and the package main body 10 ”, in the present embodiment, in the package 1 , both ends of the handle 20 are attached to the package main body 10 . It is joined to the side surface (peripheral surface) connected to the top surface. As described above in the third embodiment, according to such a configuration, the force (peel force) acting in the direction in which the joint between the handle 20 and the package body 10 is to be peeled off during carrying is relatively reduced. Therefore, it is possible to prevent problems such as peeling of the joint, and to prevent the handle from being unintentionally removed.

Regarding the above (3) “peripheral portion of joint surface (joint portion) between handle 20 and package body 10 in package body 10”, in the present embodiment, handle 20 is attached to the top of package body 10. It is joined to the side surface (peripheral surface) that is connected to the surface.

In this configuration, when a substantially vertical load due to the weight of the package main body 10 acts on the handle 20 during carrying, etc., a tensile force acts on the handle 20, and the handle 20 and the package in the package main body 10 are applied. Tensile stress due to the handle 20 acts mainly in a substantially vertical direction on the peripheral portion of the joint surface (joint portion) with the main body 10 . Therefore, when the package 1 is carried, etc., a substantially vertical force acts mainly on the peripheral portion of the joining surface between the handle 20 and the package body 10 in the package body 10, thereby Breakage due to tearing or tearing of 16 is likely to occur.

Therefore, in the present embodiment, the vertical direction (MD direction) C of the paper base material 12 having relatively high tensile strength acts on the handle 20 due to the self weight of the package body 10. Laminated paper 16 as the base material of the package body 10 is prepared in the direction (vertical direction), that is, the orientation that is the height direction of the package body 10 in the package 1, and the sanitary thin paper serving as the item to be packaged is prepared. The product is packaged to form the package body 10 .

According to this configuration, carelessness of the base material in the "peripheral portion of the joint surface (joint portion) between the handle 20 of the package body 10 and the package body 10" in (3) above may cause tearing or tearing. can be effectively prevented.

[Effect]
In the package 1 according to the fourth embodiment, the package body 10 is configured such that the MD direction C of the paper base material 12 of the package body 10 is the height direction of the package body 10, and the handle 20 Both ends are joined to the side surface (peripheral surface) connected to the top surface of the package main body 10, and the handle 20 is held so that the MD direction A of the paper base material 22 of the handle 20 is the longitudinal direction of the handle 20. It has a configuration in which the hand 20 and the package main body 10 are joined together.

According to this embodiment having such a configuration, the tensile strength of the base material is high in the direction in which the force acts when the package 1 is carried, etc. Peeling does not easily occur on the part. Therefore, the grip portion of the handle 20, the joint surface (joint portion) between the handle 20 and the package body 10, and the periphery of the joint surface (joint portion) between the handle 20 and the package body 10 in the package body 10 It is possible to obtain the package 1 that effectively prevents breakage of the base materials 16, 26 due to tearing or splitting, careless removal of the handle 20 due to peeling of the joint, and the like.

[others]
In one embodiment of the present invention, in the layer structure of the laminated papers 16, 26, the laminated papers 16, 26 may include other layers in addition to the paper substrates 12, 22 and the heat seal layers 14, 24. good. For strong bonding between the package main body 10 and the handle 20, the laminated paper 16, which is the base material of the package main body 10, and the laminated paper 26, which is the base material of the handle 20, each have the maximum layer structure. It is preferable to have the heat seal layers 14, 24 on the outer layers.

Examples of other layers that the laminated papers 16 and 26 may contain include functionality such as a water vapor barrier layer, an oxygen barrier layer, a printing layer, a printability improving layer, an overprint layer, and a light shielding layer. layer. These other layers are provided, for example, between the paper substrates 12, 22 and the heat seal layers 14, 24, on the surface of the paper substrates 12, 22 opposite to the heat seal layers 14, 24, etc. can be provided. Other layers may be provided on the upper surfaces of the heat seal layers 14 and 24 so as not to impair the heat sealability of the regions of the heat seal layers 14 and 24 that are used for bonding. The other layer may be one layer or two or more layers.

1 Package 10 Package body 12 Paper base material 14 of package body Heat seal layer (first heat seal layer) of package body
16 Base material of package body (laminated paper)
20 handle 22 handle paper base 24 handle heat seal layer (second sheet seal layer)
26 Base material for handle (laminated paper)
A, C Vertical direction (MD direction)
B, D Lateral direction (CD direction)

Claims (4)

A package main body made of laminated paper in which a first heat-seal layer is laminated on a paper base material, wherein a plurality of sanitary thin paper products are bundled together so that the first heat-seal layer is the outer surface. a package main body packaged by
A strip-shaped handle having a laminated paper in which a second heat seal layer is laminated on a paper base material as a base material, and having both longitudinal ends and an intermediate part therebetween, wherein the intermediate part is the package body. a handle having both ends joined to the outer surface of the package main body through joining of the second heat-seal layer and the first heat-seal layer so as to face the top surface;
A packaging body for sanitary tissue paper products. 2. The sanitary thin paper product package according to claim 1, wherein the first heat seal layer is used for sealing the package body. 3. The package for sanitary thin paper products according to claim 1, wherein said both ends of said handle are joined to side surfaces of said package main body which are connected to said top surface. The MD direction of the paper substrate of the package main body is the height direction of the package main body,
4. The package for sanitary thin paper products according to claim 3, wherein the MD direction of the paper substrate of the handle is the longitudinal direction of the handle.

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