TWI804715B - Packaging structure, and packaging absorbent article - Google Patents

Abstract

The packaging structure of the present invention is used to package an absorbent article comprising a liquid-impermeable back sheet, a liquid-permeable top sheet, and an absorbent article arranged between the back sheet and the top sheet. The absorbent body of the above-mentioned packaging structure, which includes a packaging sheet and a reinforcing sheet arranged between the packaging sheet and the absorbent article; wherein, by folding the packaging sheet and the reinforcing sheet together in a plurality of directions A packaged absorbent article can be obtained by packaging the absorbent article, and the reinforcing sheet is arranged at least at a corner of the packaged absorbent article.

Description

Packaging structure, and packaging absorbent article

The present invention relates to a packaging structure and a packaging absorbent article.

Absorbent articles such as sanitary napkins, panty liners, and incontinence pads are often individually folded and packaged together with a packaging sheet so that they can be transported hygienically. For the absorbent article packed in this way (packaged absorbent article), a more compact packaging structure is being considered in order to avoid the occurrence of a bulky situation in a bag or the like when being transported.

For example, Patent Document 1 describes a technique in which, when an absorbent article is arranged on a packaging sheet, the absorbent article and the packaging sheet are respectively folded at the first fold line and the second fold line along the longitudinal direction. Fold back the two outer edges of the absorbent article and the front edge of the packaging sheet at the third fold line and the fourth fold line along the width direction, respectively. Items are individually packaged (paragraphs [0044]-[0046], etc.).

[Prior Art Literature] (patent documents) Patent Document 1: Japanese Patent Laid-Open No. 2018-302

[Problem to be solved by the invention] However, in the packaging form described in Patent Document 1 that is folded in multiple directions, the folds and corners of the packaging sheet are particularly vulnerable to damage. Therefore, depending on the material of the packaging sheet, when the packaged absorbent article (packed absorbent article) is transported together with other articles in a bag, the packaging structure may be damaged. On the other hand, in recent years, in consideration of environmental protection, improvement of design, etc., various materials have been reviewed especially for packaging sheets, and among them, there are also materials with relatively low strength. Therefore, there is a need for a packaging structure that can cope with packaging sheets of various materials and is less likely to be damaged.

In view of the problems to be solved above, an object of an aspect of the present invention is to provide a packaging structure capable of compactly packaging absorbent articles without being easily damaged.

[Technical means to solve the problem] A first aspect of the present invention is a packaging structure for packaging an absorbent article comprising a liquid-impermeable back sheet, a liquid-permeable top sheet, and an The absorbent body between the sheet and the above-mentioned surface sheet; the packaging structure includes a packaging sheet and a reinforcing sheet arranged between the packaging sheet and the absorbent article, and the packaging sheet and the reinforcing sheet are placed together The packaged absorbent article can be obtained by folding and packaging the absorbent article in a plurality of directions, and the reinforcing sheet is arranged at least at a corner of the packaged absorbent article.

[Effect of the invention] According to one aspect of the present invention, it is possible to provide a packaging structure capable of compactly packaging absorbent articles without being easily damaged.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In addition, in each drawing, unless otherwise specified, the same reference numerals may be assigned to the same or corresponding configurations, and explanations thereof may be omitted. In addition, the drawings are schematic drawings in order to facilitate understanding of the invention, and constituent elements may be omitted for easy understanding of the description.

<First Embodiment>

Fig. 1A shows a packaging structure 50 for packaging absorbent articles according to the first embodiment of the present invention. FIG. 1A (a) shows the state where the absorbent article 1 to be packaged is arranged on the expanded packaging structure 50 . Also, Fig. 1A (b) shows a cross-sectional view taken along line I-I of Fig. 1A (a).

(absorbent article to be packaged)

The absorbent article 1 to be packaged by the packaging sheet 10 according to this embodiment may be a sanitary napkin, a panty liner (leucorrhea sheet), an incontinence pad, or the like. As its basic structure, as shown in Figure 1A (a) and Figure 1A (b), the following structures can be made: a liquid-impermeable back sheet 2, a liquid-permeable top sheet 3, and a The absorbent body 4 between the back sheet 2 and the top sheet 3 .

The absorbent article 1 may have an elongated shape as a whole when viewed from above. In the drawings of this specification, the longitudinal direction of the absorbent article 1 is represented as D1, and the short direction perpendicular to the longitudinal direction D1 is represented as D2. The overall shape of the absorbent article 1 is left-right symmetric (line symmetric when the center line along the longitudinal direction D1 is taken as the axis of symmetry) as shown in FIG. 1A (a) . Moreover, the structure (arrangement, shape, etc. of each element) of the absorbent article 1 is also line-symmetric. However, the shape and structure of the absorbent article 1 may not be line-symmetrical depending on the application or the like.

As the back sheet 2 of the absorbent article 1, a sheet having at least water-blocking properties, such as an olefin-based resin sheet such as polyethylene or polypropylene, can be used. Also, a laminated nonwoven fabric in which a nonwoven fabric is laminated on a polyethylene sheet or the like, or a laminated sheet of a nonwoven fabric in which liquid impermeability is substantially ensured with a waterproof film interposed therebetween can be used. In addition, it is desirable to use a moisture-permeable sheet from the viewpoint of preventing stuffiness.

The surface sheet 3 is a liquid-permeable sheet through which bodily fluids such as menstrual blood, leucorrhea, and urine pass through quickly. As the surface sheet 3, a porous or non-porous nonwoven fabric, a porous plastic sheet, or the like can be suitably used. As the raw material fiber constituting the nonwoven fabric, for example, the following materials can be used alone or in combination of two or more: olefins such as polyethylene and polypropylene; synthetic fibers such as polyester and polyamide; regenerated rayon, cupro, etc. fibers; and, blended fibers of these, and natural fibers such as cotton alone. Also, a composite fiber obtained by combining synthetic fibers having different melting points can be used.

The absorber 4 is not limited as long as it is a material capable of absorbing and retaining body fluids, but preferably contains cotton pulp and a water-absorbing polymer. As the water-absorbent polymer, superabsorbent polymer granular powder (superabsorbent polymer (SAP)), superabsorbent fiber (superabsorbent fiber (SAF)), and combinations thereof can be used. Examples of the pulp include cellulose fibers such as chemical pulp and dissolving pulp obtained from wood, and artificial cellulose fibers such as rayon and acetate fibers. As a raw material of chemical pulp, broad-leaved wood, coniferous wood, etc. can be used, but it is preferable to use a coniferous wood from the point of view, such as a long fiber length. In addition, synthetic fibers may be mixed in the absorber.

In the absorbent article 1, as shown in Fig. 1A (a) and Fig. 1A (b), side panels 7 along the longitudinal direction D1 may be provided on both sides of the main body 8 in the short direction D2. , 7. As the side sheet 7, it is also possible to use a non-woven material that has been subjected to a water-repellent treatment or a hydrophilic treatment, depending on the purpose of preventing penetration of body fluids or improving skin feel. In the side sheet 7, natural fiber, synthetic fiber, regenerated fiber, etc. can be used as a raw material.

The thickness of the absorbent article 1 can be 1-20 mm, Preferably it is 2-10 mm. The thickness may be uneven throughout the entire surface of the absorbent article 1, and the central part in the longitudinal direction or the part corresponding to the groove (groin) of the buttocks can also be adjusted by changing the thickness of the absorbent body 4. and other specific parts to make a bulging structure.

As shown in FIG. 1A (a) and FIG. 1A (b), a displacement preventing material for suppressing displacement of the absorbent article 1 being worn may be further provided on the back sheet 2 side of the absorbent article 1. 9b. The anti-displacement material 9b is preferably provided within the extending range of the absorber 4 when viewed from above. The anti-displacement material 9b can be formed as an adhesive or non-adhesive layer, but it is preferably formed as an adhesive layer from the viewpoint of enhancing the effect of preventing displacement. When forming an adhesive layer, the material used for the displacement preventing material 9b can be a hot-melt adhesive, and preferably contains a styrene-based polymer, a tackifier, and plasticizers and combinations of these.

(Packaging structure and packaging of absorbent articles based on the packaging structure) As shown in Fig. 1A (a) and Fig. 1A (b), the packaging structure 50 has a packaging sheet 10 and a reinforcing sheet 20, and the reinforcing sheet 20 is arranged on the inner surface of the packaging sheet 10, that is, for disposing The surface of one side of the absorbent article 1 to be packaged (on the paper surface of the drawing, near the front side). In addition, in the form of the drawings, the configuration (size, shape, arrangement, folding method, etc.) of the packaging sheet 10 and the reinforcing sheet 20 is line-symmetric with the center line along the longitudinal direction D1 as the axis of symmetry, but Line symmetry may not be necessary.

The packaging sheet 10 has an elongated shape like the absorbent article 1, and may have, for example, a rectangular shape as shown in FIG. 1A (a). The size and shape of the packaging sheet 10 are not particularly limited, as long as the absorbent article can be wrapped and the packaged absorbent article is not exposed. Therefore, the absorbent article 1 can also be made to protrude at the stage of placing the absorbent article on the expanded packaging sheet 10 . The size of the packaging sheet 10 can correspond to the size and shape of the absorbent article to be packaged. The length in the longitudinal direction D1 (may be simply referred to as length) is 100 to 450 mm, and the length in the short direction D2 is 100 to 450 mm. (It may be simply referred to as width) Set to 70-250mm.

Also, the size and shape of the reinforcing sheet 20 are not particularly limited, as will be described later, as long as it can be folded together with the packaging sheet 10 on two or more fold lines along the long-side direction and two or more fold lines along the short-side direction. That's it. For example, the reinforcing sheet 20 can be made into a rectangular shape as shown in FIG. 1A (a). The size and shape of the reinforcing sheet 20 are preferably such that they do not protrude from the packaging sheet 10 .

Hereinafter, packaging of the absorbent article 1 implemented using the packaging structure 50 according to this embodiment will be described with reference to FIGS. 1A to 1D .

In Figures 1A to 1D, it is shown that the packaging structure 50 is formed along the first longitudinal fold line Y1 and the second longitudinal fold line Y2 along the longitudinal direction D1 (there may be only collectively referred to as the longitudinal fold line). case), and the form of folding along the first transverse fold line X1 and the second transverse fold line X2 in the transverse direction D2 (there may be cases in which only the transverse fold line is collectively referred to as the transverse fold line). In Fig. 1A (a), intersection points P, .

When the absorbent article 1 is folded by the packaging structure 50, as shown in FIG. And the absorbent article 1 is arranged on the reinforcing sheet 20 side. Then, the packaging sheet 10 and the reinforcing sheet 20 are concave-folded together at the first longitudinal fold line Y1 and the second longitudinal fold line Y2 along the longitudinal direction D1, and folded in the transverse direction D2. In other words, both end edges of the reinforcing sheet 20 in the short direction D2 respectively exceed the first longitudinal fold line Y1 and the second longitudinal fold line Y2 in the outer direction of the short direction D2, and the first longitudinal fold line Y1 and the second longitudinal fold line Y2 are fold lines where the packaging sheet 10 is folded along the longitudinal direction D1. Thereby, as shown in the figure, the both side area|region of the packaging sheet 10 is superimposed on the absorbent article 1, and it becomes the state of FIG. 1B. In addition, in the folding order when the packaging sheet 10 is folded in the short direction D2, any one of the first longitudinal fold line Y1 and the second longitudinal fold line Y2 may be performed first.

The positions of the first longitudinal fold line Y1 and the second longitudinal fold line Y2 in the short direction D2 are not particularly limited. Wherein, as shown in the drawing, the first longitudinal fold line Y1 and the second longitudinal fold line Y2 preferably extend from the end edge of the main body 8 in the short direction D2 (in the longitudinal direction D1) at intervals. without overlapping the body 8 . Furthermore, it is preferable that the first longitudinal fold line Y1 and the second longitudinal fold line Y2 extend from the edge of the absorbent article 1 in the short direction D2 at intervals (in the longitudinal direction D1 ) without Overlapping the absorbent article 1 , that is, in the folding in the short-side direction D2 , it is preferable that the absorbent article 1 is not folded together with the packaging sheet 10 and the reinforcing sheet 20 .

In addition, when the packaging sheet 10 is folded in the short-side direction D2 on the first longitudinal fold line Y1 and the second longitudinal fold line Y2 (FIG. 1B), the two side regions of the packaging sheet 10 can also be superimposed. , or not overlap as shown in the figure. When the packaging sheet 10 is configured by folding back in the short-side direction D2 so that the side regions overlap each other, the airtightness of packaging performed by the packaging structure 50 can be improved. On the other hand, as shown in the figure, when there is no overlap between the side regions of the packaging sheet 10, the thickness of the packaging absorbent article 100 can be reduced.

Next, as shown in FIG. 1B , the packaging sheet 10 is concave-folded together with the absorbent article 1 at the first transverse fold line X1 along the transverse direction D2 and folded in the longitudinal direction D1 . Further, as shown in FIG. 1C, the packaging sheet 10 is placed together with the absorbent article 1 at the second transverse fold line X2 along the transverse direction D2 at a position separated from the first transverse fold line X1 by a predetermined interval. It is concave folded and folded in the longitudinal direction D1. Here, any one of the first transverse fold line X1 and the second transverse fold line X2 extends so as to pass through the reinforcing sheet 20 in plan view. In other words, both end edges of the reinforcing sheet 20 in the longitudinal direction D1 respectively exceed the first transverse fold line X1 and the second transverse fold line X2 in the outer direction of the longitudinal direction D1, and the first transverse fold line X1 and the second transverse direction fold line X2 are fold lines where the packaging sheet 10 is folded along the transverse direction D2. Therefore, when the packaging sheet 10 is folded, the reinforcing sheet 20 can be folded together with the packaging sheet 10 .

After folding at the second transverse fold line X2, as shown in FIG. 1D , the packaging sheet 10 can be folded in both the longitudinal direction D1 and the transverse direction D2 of the absorbent article 1 to obtain the packaged absorbent article 100 . After folding, the exposed end edge of the packaging sheet 10, that is, one end edge 11 in the longitudinal direction D1, is fixed by means of adhesives, tapes, etc., so that the packaged absorbent article 100 can be prevented from being unsealed accidentally before use. .

In addition, in this form, although the folding in the longitudinal direction D1 is carried out on two lines of the first transverse fold line X1 and the second transverse fold line X2, when the length of the longitudinal direction D1 is to be packaged In the case of an absorbent article, it can be folded on more than three fold lines. At this time, for example, after the folding in the short direction D2 is completed, the front sheet 3 side of the absorbent article 1 is placed in advance in the long direction D1 at a position outside the first short fold line X1 in the long direction D1. After folding, it can be folded on the first transverse fold line X1 and the second transverse fold line X2 as described above.

In addition, in the form of the drawing, the first longitudinal fold line Y1 and the second longitudinal fold line Y2 are folded in the short direction D2, and then the first longitudinal fold line X1 and the second longitudinal fold line are folded. X2 is folded in the longitudinal direction D1, but the order of folding is not limited thereto. For example, it is also possible to fold on the first long-side direction fold line X1 and the second short-side direction fold line X2 in the long-side direction D1, and then fold on the first long-side direction fold line Y1 and the second long-side direction fold line Y2 on the short side. Direction D2 folds. Also in this case, the compactly packaged absorbent article 100 as shown in FIG. 1D can be obtained.

Thus, in this embodiment, the packaging sheet 10 is folded along the first longitudinal fold line Y1 and the second longitudinal fold line Y2 , and the first transverse fold line X1 and the second transverse fold line X2 . That is, the packaging sheet 10 and the packaging structure 50 are each folded in at least three folds in the longitudinal direction and the lateral direction. This makes it possible to obtain a compact (small) packaged absorbent article 100 that is not bulky as a whole.

Moreover, according to this form, the edge of the packaging sheet 10 after folding is hardly exposed. That is, in the packaged absorbent article 100, the package sheet 10 is exposed only at a part of one end edge 11 of the portion folded by the final folding back, and the other edge is located inside the packaged absorbent article 100 (1D picture). Therefore, after the packaging sheet 10 is folded, it is not necessary to join, for example, both end edges of the packaging sheet 10 in the short-side direction D2 by sealing means such as heat sealing. This eliminates the need to form sealing edges at the ends of the packaging sheet 10, so that the packaged absorbent article 100 can be configured with a small volume. In addition, even packaging sheets made of materials and/or thicknesses that cannot be joined by sealing means such as heat sealing can be applied to the packaging structure 50 according to this form, so the range of material selection for the packaging sheets get bigger.

However, when the packaging sheet is folded and the absorbent article is packaged by such a folding method with a large number of folds, when the packaged absorbent article is put into a bag with other daily necessities and carried for a long time, etc., due to Collision or friction with other daily items can easily cause creases, especially the corners are easily damaged. For example, in the packaged absorbent article 100 shown in FIG. 1D, each corner C ₁₀₀ (FIG. 1D) and its surrounding parts are particularly vulnerable to damage, so depending on the material of the packaging sheet, there may be concerns about packaging chip breakage.

On the other hand, according to the packaging structure 50 of this form, it is provided with the reinforcing sheet 20, and the reinforcing sheet 20 and the packaging sheet 10 are formed along a plurality of folding lines in different directions, specifically, in the longitudinal direction and the short direction. Polyline folds. Thereby, the creases of the reinforcing sheet 20 are arranged along the creases of the packaged absorbent article 100 obtained. In addition, in the reinforcing sheet 20, corners C ₂₀ , ... of the reinforcing sheet 20 are formed at intersection points P, ... where fold lines extending in different directions intersect _. Corners C ₁₀₀ in article 100 (FIG. 1D). Therefore, in the corner _C100 of the packaged absorbent article 100, the package sheet 10 and the package structure 50 are reinforced, and even when the packaged absorbent article 100 is transported with the surface easily damaged, the package structure 50 Not easy to break either.

In addition, when the first longitudinal fold line Y1 and the second longitudinal fold line Y2 are positioned outside the edge of the absorbent body 4 or the absorbent article 1 in the transverse direction D2 as shown in the drawings, the corresponding thickness The reduced weight tends to easily break the folds and corners _C100 of the packaged absorbent article 100, but in such a case, the reinforcing sheet 20 can particularly perform a reinforcing function.

The packaging sheet 10 and the reinforcing sheet 20 may be joined entirely or partially, or may not be joined. When bonding, both can be bonded using an adhesive, embossing, or the like. When not joined, the reinforcing sheet 20 is arranged so as to be foldable on the first longitudinal fold line Y1 and the second longitudinal fold line Y2, and the first transverse fold line X1 and the second transverse fold line X2. Wrap sheet 10 on.

In addition, the length d _y1 of the folded portion of the reinforcing sheet 20 in the short direction D2 of the first fold line Y1 in the longitudinal direction is preferably 5 mm or more, more preferably 10 mm or more. The packaging structure 50 according to this form has a line-symmetric structure, so the length d _y2 of the folded portion of the reinforcing sheet 20 folded back on the second longitudinal fold line Y2 in the short direction D2 can also be set to be the same as d _y1 . Further, the length d x1 of the folded portion of _the reinforcing sheet 20 in the longitudinal direction D1 of the folded portion folded back on the first short-side fold line X1 is preferably 5 mm or more, more preferably 10 mm or more. Also, the length _dx2 in the longitudinal direction D1 of the folded portion folded back on the second transverse fold line X2 may be the same as _dx1 . In this way, the effect of reinforcing the packaging sheet 10 by the reinforcing sheet 20 can be enhanced by setting the lengths d _y1 , d _y2 , d _x1 , and d _x2 of the folded-back portion within the above range. In addition, the lengths d _y1 , d _y2 , d _x1 , and d _x2 of the above-mentioned folded-back portions can be the lengths in plan view after the fold-back. That is, in the case where the thickness of the absorbent article 1 is large, for example, the length d _y1 of the folded portion may be longer than that from the first fold line Y1 in the longitudinal direction of the reinforcing sheet 20 to the outer edge in the transverse direction D2. So far the length is shorter.

In addition, the reinforcing sheet 20, as shown in the figure, is a continuous sheet, that is, a continuous sheet, so that it can be superimposed on the absorbent article 1, especially corresponding to the bodily fluid outlet of the wearer when wearing it. The portion (the central portion in the longitudinal direction D1 and the central portion in the lateral direction D2) can be protected in the packaged absorbent article. Wherein, the reinforcing sheet 20 may also be composed of a plurality of divided reinforcing sheets, as long as the first longitudinal fold line Y1 and the second longitudinal fold line Y2, and the first short-edge fold line X1 and the second short Just fold X2 in the edge direction.

The material used for the packaging sheet 10 is not particularly limited, and resin films, nonwoven fabrics, paper, and the like can be used. In addition, as the packaging sheet 10, a refractory material, that is, a material that is not easily melted or not melted by heat can be used. When a refractory material is used for the packaging sheet 10, it becomes difficult or impossible to overlap and heat-seal (heat-seal) the packaging sheet 10 . However, according to the above-mentioned folding method (Fig. 1A to Fig. 1D) of this embodiment, heat-sealing is not required to pack the absorbent article, so even if the refractory packaging sheet 10 is used, the absorbent article can be packaged hygienically and individually. thing.

In the case of using paper as the material of the packaging sheet 10, it is preferable because the burden on the environment is small when it is disposed of. In addition, in this specification, paper can refer to the paper formed into a flat sheet by sticking plant fibers or other fibers with glue. In particular, it can refer to paper using plant fibers (pulp) as a main raw material, for example, paper containing 50% or more of plant fibers, preferably 80% or more of the fibers. As the kind of pulp contained in paper, wood pulp, non-wood pulp, waste paper pulp may be included, and these may be either mechanical pulp or chemical pulp. Additives can also be added to the paper. Furthermore, as an example of the specific paper used for the packaging sheet 10, various types of paper, such as foreign paper, Japanese paper, processed paper, and synthetic paper, can be mentioned. Also, paper previously used for other purposes, such as newspaper, printing paper (including high-quality paper), note paper, drawing paper, wrapping paper, tissue paper, miscellaneous paper, etc., can also be used. , used directly or after processing.

In order to easily fold the packaging sheet 10 and make the folded packaging structure 50 difficult to open, the packaging sheet 10 can be made of thin paper with a low basis weight. Tissue paper may be thin molded paper, dictionary paper, rice paper (used as cigarette rolling paper), cellophane, facial tissue, toilet paper, filter paper, and the like.

When the packaging sheet 10 is made of paper, it may be paper processed after papermaking. Processing includes, for example, crease processing, embossing processing, calender processing, water-repellent processing (including peeling processing described later), slitting processing, ply processing, printing processing, and the like. By performing wrinkling or embossing, both strength and flexibility can be improved. Moreover, when the packaging sheet 10 is subjected to water-repellent processing, for example, a water-repellent agent including silicone resin, paraffin resin, fluorine resin, etc. can be coated on the outer surface of the packaging sheet 10 (in the absorbent article 1 The side exposed to the outside in the packaged state) and at least one of the inner surface on the opposite side to the outer surface.

The packaging sheet 10 may be a single-layer sheet made of the above-mentioned materials, or may be a laminated sheet in which a plurality of layers made of different materials are laminated. Therefore, for example, a resin film may be laminated on the aforementioned paper sheet.

The basis weight of the packaging sheet 10 can be set to preferably not more than 50 g/m ² , more preferably not more than 40 g/m ² , still more preferably not more than 30 g/m ² , not more than 20 g/m ² , and not more than 11 g/m ² , or 8g/m ² or less. Also, the lower limit of the basis weight of the packaging sheet 10 is not particularly limited as long as it can function as the packaging sheet 10, but it can be preferably 5 g/m ² or more, more preferably 10 g/m ² or more.

Moreover, the thickness of the packaging sheet 10 is preferably 40 to 200 μm, more preferably 100 to 200 μm.

On the other hand, as the material of the reinforcing sheet 20, a resin film, a nonwoven fabric, paper, etc. can be used. The reinforcing sheet 20 can be formed using any of the above-mentioned materials for the packaging sheet 10 . In the packaging structure 50, the reinforcement sheet 20 and the packaging sheet 10 may be comprised with the same material, and may be comprised with a different material. In addition, it is preferable to use paper as a material of the reinforcing sheet 20 from the viewpoint of reducing environmental load. In addition, since the rigidity of paper is relatively high, the effect of reinforcing the packaging sheet 10 with the reinforcing sheet 20 can be enhanced.

The reinforcing sheet 20 preferably has the same strength as the packaging sheet 10 or higher strength than the packaging sheet 10 . Here, the strength particularly refers to one or more of tear strength, tensile strength, burst strength, folding strength, and torsional strength. That is to say, the reinforcing sheet 20 in this form has at least one of tear strength, tensile strength, burst strength, folding strength, and torsional strength, preferably equal to the strength of the packaging sheet 10, or stronger than the packaging sheet 10. Tablet 10 for greater strength.

The basis weight of the reinforcing sheet 20 can be preferably not more than 50 g/m ² , more preferably not more than 40 g/m ² , and even more preferably not more than 35 g/m ² . Also, the lower limit of the basis weight of the reinforcing sheet 20 is not particularly limited as long as it has the function of reinforcing the packaging sheet 10, but it can be preferably 10 g/m ² or more, more preferably 15 g/m ² or more, and even more preferably 15 g/m 2 or more. ^More than 25g/m2.

The thickness of the reinforcing sheet 20 is preferably 200-400 μm, more preferably 200-300 μm.

Moreover, it is preferable that the rigidity of the reinforcement sheet 20 is larger than the rigidity of the packaging sheet 10 from a viewpoint of exhibiting a high reinforcement function. For the rigidity of the sheet, for example, a torsion tester (KES-YN-1-B manufactured by KATO TECH Co., Ltd.) can be used to fix both ends in the longitudinal direction of the test body (60 mm in width) of the sheet to each jig (jig The distance between them is 110mm), and the maximum load (anti torque).

The rigidity of the packaging sheet 10 can be set to 10 gf•cm/cm or less, preferably 7 gf•cm/cm or less. If it exists in the said range, the texture when a user touches a packaged absorbent article can be improved. The rigidity of the reinforcing sheet 20 can be 12 gf·cm/cm or more, preferably 14 gf·cm/cm or more. If it exists in the said range, the reinforcement function with respect to the packaging sheet 10 can be strengthened.

Also, the ratio of the rigidity of the reinforcing sheet 20 to the rigidity of the packaging sheet 10 ((rigidity of the reinforcing sheet 20)/(rigidity of the packaging sheet 10)) may exceed 1, preferably 1.2 to 2, more preferably 1.4～1.8.

On at least one of the packaging sheet 10 and the reinforcing sheet 20, one of the first longitudinal fold line Y1 and the second longitudinal fold line Y2, and the first transverse fold line X1 and the second transverse fold line X2 can be formed. In the above positions, creases are pre-applied at least in part. Thereby, folding packaging of the above-mentioned absorbent article becomes easier.

The above-mentioned displacement preventing material 9b is provided in the absorbent article 1 packaged by the packaging structure 50 according to this embodiment. The anti-displacement material 9b is composed of a plurality of anti-displacement materials in a strip shape along the longitudinal direction D1 as shown in FIG. 1A (a). Thereby, the absorbent article 1 can be more reliably fixed to the underwear while the absorbent article 1 is being worn. Here, when an adhesive layer is used as the displacement preventing material 9b, the reinforcing sheet 20 of the packaging structure 50 in this form can be disposed as a peeling sheet that detachably contacts the displacement preventing material 9b. composition. At this time, the reinforcing sheet 20 has a size and shape capable of covering the displacement preventing material 9b as shown in FIG. 1A (a).

The peeling sheet is a sheet having a peeling surface with a peeling function. The peeling sheet can isolate and protect the displacement preventing material from other constituent elements when the absorbent article is packaged and is not in use. Sometimes the anti-displacement material is easily peeled off to expose the anti-displacement material. The release sheet can be formed by subjecting the substrate to release processing to impart a release function. At this time, the material described about the reinforcing sheet 20 (that is, the material described about the packaging sheet 10) can be used as a base material. The peeling process can be performed, for example, by applying or spraying a peeling treatment liquid (release treatment liquid) such as a silicone resin, a fluorine resin, or a tetrafluoroethylene resin. In addition, a film may be formed using a resin that has been made releasable by the above-mentioned release treatment liquid to form a release sheet. When the reinforcing sheet 20 is a release sheet, the base material of the sheet is paper, especially high-quality paper.

In addition, the peeling sheet (reinforcing sheet 20) may also have a peeling surface on one or both sides, but as long as the surface facing the side of the displacement preventing material 9b is at least the part corresponding to the displacement preventing material 9b What is necessary is just to make a peeling surface (peeling surface part). Also, the surface of the peeling sheet (reinforcing sheet 20) facing the packaging sheet 10 is made into a non-peeling surface that does not have a peeling function, so that the friction between the reinforcing sheet 20 and the packaging sheet 10 becomes larger, and It is possible to prevent the two sheets from shifting when the absorbent article is folded and packaged. In addition, when the reinforcing sheet 20 and the packaging sheet 10 are joined with an adhesive or the like, the joining strength can also be improved.

By making the reinforcing sheet 20 a peeling sheet in this way, the reinforcing sheet 20 can have both the function of reinforcing the packaging sheet 10 and the function of a peeling sheet protecting the displacement preventing material 9b as a peeling sheet.

>Second Embodiment> Fig. 2A shows a packaging structure 250 for packaging absorbent articles according to a second embodiment of the present invention. In Fig. 2A (a), a state in which the absorbent article 201 to be packaged is arranged on the packaged absorbent article 250 after development is shown. Moreover, Fig. 2A (b) shows a cross-sectional view along line II-II of Fig. 2A (a). The packaging structure 250 according to the second embodiment has the same basic configuration as the packaging structure 50 according to the first embodiment, and the packaging sheet 210 and the reinforcing sheet 220 are overlapped. However, the packaging structure 250 is different in shape and size from the packaging sheet 10 and the reinforcing sheet 20 in order to package the absorbent article 201 having wings W and W, and in that an additional release sheet 230 is provided, It is different from the packaging structure 50 (FIG. 1A (a)).

As shown in FIG. 2A(a) and FIG. 2A(b), the absorbent article 201 includes a pair of wings W, W extending from both sides of the main body 208 outward in the lateral direction D2. In the state of the drawing, the wings W and W are flap-shaped parts, which are side panels 207 and 207 extending outward in the direction of the short side D2 near the center of the long side direction D1. The back sheet 202 extending outward in the lateral direction D2 is bonded and formed. The wings W, W, when used, have the function of more reliably fixing the absorbent article folded back on the undergarment side to the undergarment. Wings W and W are respectively provided with displacement preventing materials 209w and 209w for wings for attaching the wings to underwear. As the displacement preventing material 209w for wings, the same materials as those described above for the displacement preventing material 9b in the first embodiment can be used.

In this form, the reinforcement sheet 220 is comprised as the peeling sheet which contacts and protects the displacement preventing materials 209w and 209w for wings. Therefore, the reinforcing sheet 220 extends outward in the lateral direction D2 so as to include the extended portions of the wing displacement preventing materials 209w and 209w as shown in the figure.

As shown in FIG. 2A(a) and FIG. 2A(b), the absorbent article 201 includes a main body displacement preventing material 209b similar to the displacement preventing material 9b of the absorbent article 1 in the first embodiment. In this form, the peeling sheet 230 can be additionally arrange|positioned for this displacement prevention material 209b for main bodies.

Next, packaging of the absorbent article 201 performed by the packaging structure 250 of the second embodiment will be described with reference to FIGS. 2A to 2D. The packaging method is the same as that of the packaging structure 50 according to the first embodiment, unless otherwise stated.

As shown in FIG. 2A (a), a packaging structure 250 in which the packaging sheet 210 and the reinforcing sheet 220 are stacked in an unfolded state is prepared, and the absorbent article 201 is arranged in a state where the wings W and W are unfolded. Reinforcement sheet 220 side. Thereafter, first, concave folding is performed on the first longitudinal fold line Y1 and the second longitudinal fold line Y2 along the longitudinal direction D1 to fold the wings W, W. After the wings W, W are folded, the back sheet 202 side of the wings W, W is exposed, so the displacement preventing materials 209w, 209w for wings are arranged at appropriate positions of the wings W. Thereafter, the reinforcing sheet 220 and the packaging sheet 210 are recessed and folded along the first longitudinal fold line Y1 and the second longitudinal fold line Y2. Alternatively, after placing the absorbent article 201 in a state in which the wings W and W have been folded in advance on the unfolded packaging structure 250, the flap displacement preventing materials 209w and 209w may be similarly arranged, and then the package Sheet 210 and reinforcing sheet 220 are folded together.

FIG. 2B shows a state in which the packaging sheet 210 and the reinforcing sheet 220 are folded along the first longitudinal fold line Y1 and the second longitudinal fold line Y2. As shown in FIGS. 2A and 2B , in this embodiment, a part of the absorbent article 201 is also folded along the first longitudinal fold line Y1 and the second longitudinal fold line Y2 . In the example shown in the drawings, the first longitudinal fold line Y1 and the second longitudinal fold line Y2 are located outside the short direction D2 of the absorbent body 204 of the absorbent article 201, that is, they do not overlap when viewed from above. in the absorber 204. Thereby, the thickness of the packaged absorbent article obtained after folding can be avoided, and creases can be avoided in the absorber 204 . Furthermore, the first longitudinal fold line Y1 and the second longitudinal fold line Y2 are preferably located in the short direction D2 of the main body 208 of the absorbent article 201 (in this example, the part excluding the wings W and W). outside, that is, not overlapping the body 208 .

From the state shown in FIG. 2B, the packaging sheet 210, the reinforcing sheet 220, and the absorbent article 201 are further folded along the first short-side direction fold line X1 along the short-side direction D2, and then folded along the second short-side direction fold line X2. , folded in the longitudinal direction D1 (Fig. 2B and Fig. 2C). In the folding of the first transverse fold line X1 and the second transverse fold line X2, the release sheet 230 for protecting the main body displacement preventing material 209b is also folded together. Then, the packaged absorbent article 200 as shown in FIG. 2D can be obtained by such folding in the long-side direction D1 and the short-side direction D2.

In this way, the absorbent article 201 including the wings W and W can also be packaged compactly by the packaging structure 250 . In addition, the creases and corners of the obtained packaged absorbent article 200 are also reinforced by the reinforcing sheet 220 . In particular, as shown in FIG. 2D, intersection points _P , . It is arranged at the corners C _{200 ,} . . . of the packaged absorbent article 200 . Thereby, it is possible to provide a packaging structure that is not easily damaged.

<Third Embodiment>

Fig. 3 shows a packaging structure 350 according to a third embodiment of the present invention. The packaging structure 350 can be called a modified example of the packaging structure 250 according to the above-mentioned second embodiment. The packaging structure 350, like the packaging structure 250 (FIGS. 2A to 2D), has a packaging sheet 310 and a reinforcing sheet 320 superimposed on the packaging sheet 310, and can package the absorbent article 301 having wings W and W. . However, this embodiment is different from the packaging structure 250 according to the second embodiment in that the shape of the reinforcing sheet 320 is different, and that an additional peeling sheet 230 is not provided corresponding to the displacement preventing material 209b for the main body.

As shown in FIG. 3 , the reinforcing sheet 320 is not a square, but has a shape in which the four corners of the square are cut off. In other words, it is a shape protruding outward at four places at both ends in the longitudinal direction D1 and at both ends in the short direction D2. In FIG. 3, the reinforcing sheet 320 has an outer portion in the longitudinal direction D1 The protruding portions 320a, 320b in the direction and the protruding portions 320c, 320d in the outer direction of the short side direction D2. The reinforcing sheet 320 in this form can also be folded in the short direction D2 on the first longitudinal fold line Y1 and the second longitudinal fold line Y2 along the longitudinal direction D1, and can be folded along the short direction D2. The first short-side fold line X1 and the second short-side fold line X2 in the side direction D2 are folded in the long-side direction D1.

In addition, the above-mentioned shape in which the four corners of the quadrangular shape of the reinforcing sheet 320 are cut off includes the wings W of the absorbent article 301, the displacement preventing materials 309w and 309w for the wings of the W, and the displacement prevention materials 309w provided on the main body 308. Bits prevent the way material 309b extends. Therefore, unlike the packaging structure 250 (FIG. 2A) according to the second embodiment, the peeling sheet 230 is not separately provided, and the single reinforcing sheet 320 can also be attached to the wing displacement preventing material 309w, 309w and the displacement preventing material 309b for the main body, and achieve the function of protecting these displacement preventing materials as a peeling sheet.

When the thickness of the absorbent article 301 is large, the reinforcing sheet 320 is easily twisted at the intersection of the fold lines. On the other hand, according to the reinforcing sheet 320 whose four corners are cut off according to the present form, when folding, each of the protruding parts 320a, 320b, 320c, and 320d can move relatively independently, so the reinforcing sheet 320 becomes easy to fold. . In addition, since the corners away from the fold lines are cut off, the material of the reinforcement sheet 320 can be saved while maintaining the reinforcing effect at the folds of the packaging sheet 310 and the corners where the folds intersect.

Furthermore, FIG. 4 shows a modified example of the reinforcing sheet 320 . Either of Fig. 4 (a) and Fig. 4 (b) is a partial enlarged view of the reinforcing sheet 320, and shows the protruding parts 320a and 320d of the reinforcing sheet 320. In the example of FIG. 4 (a), a slit S (notch) in the short side direction D2 is formed from the boundary point BP between the protruding parts (the corner of the concave portion of the outline of the reinforcing sheet 320 in FIG. 3 ). ). Thereby, the independence of the protruding parts 320a and 320d is further improved, and mutual movement becomes easy, so that the reinforcing sheet 320 can be easily folded. In addition, such slits S may be formed extending not in the short direction D2 but in the long direction D1. Also, two slits may be formed to extend in both the short-side direction D2 and the long-side direction D1.

In the example of FIG. 4 (b), the slit S is from the boundary point BP (FIG. 3) of the protrusions 320a and 320b toward the intersection point P of the first longitudinal fold line Y1 and the second longitudinal fold line Y2. extend. Such a slit can also obtain the same effect as that of Fig. 4 (a). In addition, the slit may be formed at one or more boundary points BP between the protruding portions of the reinforcing sheet 320, or may be formed at all the boundary points BP.

Hereinafter, preferred aspects of the present invention will be described.

(Note 1) Regarding the aspect of appendix 1, it is a packaging structure for packaging absorbent articles; the absorbent article has a liquid-impermeable back sheet, a liquid-permeable top sheet, and The absorbent body between the aforementioned surface sheet; the packaging structure comprising a packaging sheet and a reinforcing sheet arranged between the aforementioned packaging sheet and the aforementioned absorbent article; wherein, by combining the aforementioned packaging sheet and the aforementioned reinforcing sheet The packaged absorbent article can be obtained by folding the packaged absorbent article in a plurality of directions, and the reinforcing sheet is disposed on at least a corner of the packaged absorbent article.

According to the aspect of the above-mentioned appendix 1, the packaging structure for packaging absorbent articles has a packaging sheet and a reinforcing sheet, and by placing the packaging sheet and the reinforcing sheet together in a plurality of directions (in a plurality of directions along different directions), fold line) to package the absorbent article to obtain a packaged absorbent article. Therefore, a compactly packaged absorbent article can be obtained. In addition, since the reinforcing sheet is disposed at the corners of the packaging absorbent article or the packaging structure, even when a relatively weak material is used as the packaging sheet, the reinforcing sheet can reinforce from the inside and is particularly vulnerable to external shocks. The corner of the damaged packaging sheet (the corner of the packaging absorbent article), so the possibility of damage to the packaging sheet can be reduced. Therefore, according to this aspect, it is possible to obtain a packaged absorbent article that is compact and not easily damaged.

(Note 2) Regarding the aspect of Supplementary Note 1, it is the packaging structure described in Supplementary Note 1, wherein the packaging sheet and the reinforcing sheet are formed on the first longitudinal fold line and the second longitudinal fold along the longitudinal direction of the absorbent article. The side direction fold line is folded, and it is folded on the first short side direction fold line and the second short side direction fold line along the short side direction of the aforementioned absorbent article.

According to the aspect of Supplement 2 above, the packaging structure for packaging absorbent articles is folded on the first long-side fold line and the second long-side fold line, and is folded on the first short-side fold line and the second short-side fold line. It is formed by folding the edge direction polylines. Therefore, since the packaging structure is folded in at least three folds in each of the longitudinal direction and the lateral direction, it is possible to obtain a more compact packaging of the absorbent article. Also, the packaging sheet and the reinforcing sheet are folded together on the first longitudinal fold line and the second longitudinal fold line, as well as the first short-edge fold line and the second short-edge fold line, so that the folds or corners of the packaging sheet, It can be more reliably reinforced by the reinforcing sheet, thereby reducing the possibility of damage to the packaging sheet.

(Note 3) An aspect of supplementary note 3 is the packaging structure according to supplementary note 2, wherein the first longitudinal fold line and the second longitudinal fold line are positioned outside the absorber in the short direction.

According to the aspect of the above-mentioned supplementary note 3, it is possible to prevent the thickness of the packaged absorbent article obtained after folding from becoming large, and to prevent creases from being formed on the absorber.

(Note 4) Regarding the aspect of appendix 4, it is the packaging structure described in any one of appendixes 1 to 3, wherein the aforementioned absorbent article is equipped with a displacement preventing material on the side of the aforementioned back sheet; At least the portion of the article that is in contact with the displacement preventing material is a release sheet that has been subjected to a release process.

According to the aspect of the above-mentioned supplementary note 4, at least the part of the reinforcing sheet that is in contact with the displacement preventing material is subjected to a peeling process to form at least a peeling sheet. Therefore, the reinforcing sheet can have both the function of reinforcing the packaging sheet and the function of protecting the displacement preventing material as a release sheet so as to avoid contact between the displacement preventing material and other elements.

(Note 5) An aspect of supplementary note 5 is the packaging structure according to supplementary note 4, wherein the absorbent article has wings, and the displacement preventing material includes a displacement preventing material for wings provided on the side of the back sheet of the wings , in the state in which the wings are deployed, the reinforcing sheet includes the displacement preventing material for wings when viewed from above.

According to the aspect of the above-mentioned appendix 5, as mentioned above, it can be used as a packaging structure capable of packaging absorbent articles with wings, and the reinforcing sheet included in the packaging structure has both the function of a reinforcing packaging sheet and the function of a peeling sheet. function.

(Note 6) An aspect of supplementary note 6 is the packaging structure described in any one of supplementary notes 1 to 5, wherein the packaging sheet is made of a refractory material.

According to the aspect of the above-mentioned supplementary note 6, the choice of the material of the packaging sheet can be increased, for example, it is possible to select a material that takes into account the impact on the environment when it is discarded.

(Note 7) An aspect of supplementary note 7 is the packaging structure according to any one of supplementary notes 1 to 6, wherein the rigidity of the reinforcing sheet is higher than that of the packaging sheet.

According to the aspect of the above-mentioned supplementary note 7, the packaging sheet can be more reliably reinforced by the reinforcing sheet.

(Note 8) An aspect of appendix 8 is a packaged absorbent article including the packaging structure described in any one of appendixes 1 to 7, and an absorbent article.

According to the aspect of the said supplementary note 8, the packaged absorbent article which exhibits the effect similar to the effect obtained by any one of the said supplementary notes 1-7 can be provided.

This application claims priority based on Japanese Patent Application No. 2019-064422 filed with the Japan Patent Office on March 28, 2019, and the entire content of this application is referred to and incorporated herein.

1,201,301: Absorbent articles

2,202: back film

3,203: surface sheet

4,204: absorber

7,207: side panels

8,208,308: Body of absorbent articles

9b, 309b: displacement prevention material

10,210,310: packaging sheet

11: One edge of the long side direction of the packaging sheet

20,220,320: reinforcement film

50,250,350: Wrapper Construct

100: Packaging absorbent articles

209b: Displacement prevention material for body

209w, 309w: Displacement prevention material for wings

230: Stripping sheet

320a, 320b, 320c, 320d: protruding parts

C ₁₀₀ , C ₂₀₀ : wrapping corners of absorbent articles

C ₂₀ , C ₂₂₀ : the corner of the reinforcing sheet

D1: Long side direction of absorbent article

D2: The direction of the short side of the absorbent article

P: the intersection point of polylines in different directions

BP: Boundary point between salient parts

X1: Polyline in the direction of the first short side

X2: Polyline in the direction of the second short side

Y1: Polyline in the direction of the first long side

Y2: Polyline in the direction of the second long side I-I, II-II: hatching S: slit W: wing

Fig. 1A shows a plan view and a cross-sectional view of a packaging structure according to a first embodiment of the present invention together with an absorbent article. Fig. 1B is a diagram for explaining packaging of absorbent articles by the packaging structure according to the first embodiment of the present invention. Fig. 1C is a diagram for explaining packaging of absorbent articles by the packaging structure according to the first embodiment of the present invention. Fig. 1D is a diagram for explaining packaging of absorbent articles by the packaging structure according to the first embodiment of the present invention. Fig. 2A shows a plan view and a cross-sectional view of a packaging structure according to a second embodiment of the present invention together with an absorbent article. Fig. 2B is a diagram for explaining packaging of absorbent articles by the packaging structure according to the second embodiment of the present invention. Fig. 2C is a diagram illustrating packaging of absorbent articles by the packaging structure according to the second embodiment of the present invention. Fig. 2D is a diagram for explaining packaging of absorbent articles by the packaging structure according to the second embodiment of the present invention. Fig. 3 is a plan view showing a packaging structure according to a third embodiment of the present invention. Fig. 4 shows a modified example of the reinforcing sheet in the third embodiment of the present invention.

Domestic deposit information (please note in order of depositor, date, and number) none

Overseas storage information (please note in order of storage country, organization, date, and number) none

1: Absorbent articles

3: surface sheet

4: Absorber

7: side piece

8: The main body of the absorbent article

9b: Displacement prevention material

10: Packaging sheet

11: One edge of the long side direction of the packaging sheet

20: Reinforcing film

50:Package Construct

D1: Long side direction of absorbent article

D2: The direction of the short side of the absorbent article

P: the intersection point of polylines in different directions

X1: Polyline in the direction of the first short side

X2: Polyline in the direction of the second short side

Y1: Polyline in the direction of the first long side

Y2: Polyline in the direction of the second long side

I-I: hatching

Claims (7)

A packaging structure for packaging an absorbent article comprising a liquid-impermeable back sheet, a liquid-permeable top sheet, and an absorbent sheet disposed between the back sheet and the top sheet. body; the packaging structure has a packaging sheet and a reinforcing sheet disposed between the packaging sheet and the absorbent article; wherein, by placing the packaging sheet and the reinforcing sheet together along the The first longitudinal fold line and the second longitudinal fold line in the longitudinal direction are folded, and the absorbent article is folded on the first transverse fold line and the second transverse fold line along the shorter direction of the aforementioned absorbent article for packaging. The aforementioned absorbent article can be packaged to obtain an absorbent article, and the aforementioned reinforcing sheet is arranged at least at a corner of the packaged absorbent article; the aforementioned reinforcing sheet has a shape in which four corners of a quadrangular shape are cut off, and has a shape of The protruding portion in the outer direction of the aforementioned longitudinal direction and the protruding portion in the outer direction of the aforementioned shorter direction individually; the aforementioned first longitudinal fold line and the aforementioned second longitudinal direction are located on the outer side than the aforementioned shorter direction The aforementioned protruding portion in the direction of the short side is closer to the inner side in the aforementioned short side direction, and the aforementioned first short side direction fold line and the aforementioned second short side direction are located in the aforementioned long side direction than the aforementioned protruding portion in the aforementioned long side direction. On the inner side; the intersection point of the aforementioned protruding portion from the aforementioned outer direction toward the aforementioned long side direction and the aforementioned protrusion portion toward the aforementioned outer direction in the aforementioned short side direction, a slit. The packaging structure according to claim 1, wherein the first fold line in the longitudinal direction and the second fold line in the longitudinal direction are located outside the absorbent body in the short direction. The packaging structure according to claim 1 or 2, wherein the absorbent article is provided with a displacement preventing material on the side of the back sheet; The part is a release sheet that has undergone a peeling process. The packaging structure according to claim 3, wherein the absorbent article has wings, and the displacement preventing material includes a displacement preventing material for wings provided on the side of the back sheet of the wings, in a state where the wings are unfolded. Next, the reinforcement sheet includes the displacement prevention material for wings when viewed in plan. The packaging structure according to claim 1 or 2, wherein the packaging sheet is made of a refractory material. The packaging structure according to claim 1 or 2, wherein the rigidity of the reinforcing sheet is higher than that of the packaging sheet. A packaged absorbent article comprising the packaging structure described in any one of Claims 1 to 6, and an absorbent article.

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