JP4974577B2 - Absorbent packaging structure - Google Patents

Description

  The present invention relates to a packaging structure for absorbent articles.

Conventionally, absorbent articles such as sanitary napkins and panty liners (orimono sheets) are folded together with packaging materials, individually packaged (individually packaged), and marketed.
Also, a pair of wing portions having adhesive portions are provided on both sides in the longitudinal direction of the main body, and when used, the pair of wing portions are used by being fixed to a crotch portion of a wearing tool such as shorts via the adhesive portion. It has been known.
In the packaging structure of an absorbent article having this type of wing part, the adhesive part is covered with release paper, and the adhesive part is protected until the absorbent article is used. However, when the absorbent article is used, it is necessary to peel and discard the release paper, which makes it difficult to dispose of the release paper. Further, when the absorbent article is discarded, there is a problem of clogging the toilet bowl.

As a technique that eliminates the need for a release paper for protecting the adhesive portion, Patent Document 1 discloses a sanitary napkin in which an adhesive portion having a surface tack force of a specific value or less is provided on the non-skin contact surface of the main body portion of the absorbent article. Is described.
In Patent Document 2, an adhesive part that can be laminated and peeled off is formed on the main body part and the wing part of the absorbent article, and the adhesive part of the wing part is overlapped with the adhesive part of the main body part to release the release paper. The technology that is unnecessary is described.

JP-A-8-124198 Japanese Patent Laid-Open No. 5-103813

However, the technique of Patent Document 1 limits the pressure-sensitive adhesive that can be used for forming the pressure-sensitive adhesive layer. Moreover, when the adhesion layer in the technique of patent document 1 is applied to a wing part, there exists a possibility that sufficient fixing performance may not be obtained.
The technique of Patent Document 2 also limits the pressure-sensitive adhesive that can be used for forming the pressure-sensitive adhesive part. In addition, since the wing part is folded on the non-skin contact surface side of the main body part and the adhesive part of the wing part is overlapped with the adhesive part of the main body part, the size and range of the adhesive part provided on the main body part is the same as that of the wing part. There is also a problem that it is restricted by the relationship with the adhesive part.

  Accordingly, an object of the present invention is to provide a packaging structure for absorbent articles that does not require a release paper for protecting the adhesive part of the wing part and has a high degree of freedom in selecting an adhesive.

  The present invention relates to an absorbent article provided with a pair of wing portions having adhesive portions on both sides in the longitudinal direction of the main body, in the longitudinal direction together with the packaging material in a state where the wing portions are folded on the skin contact surface side of the main body. Folding and packaging structure of absorbent article formed by sealing a predetermined portion of the packaging material, a pair of peelable with respect to the adhesive part on the skin contact surface on both sides in the longitudinal direction of the main body The above-described object is achieved by providing a packaging structure for absorbent articles in which the side leakage preventing sheet is disposed and the adhesive portion is covered with the side leakage preventing sheet (hereinafter referred to as “No. 1”). The term “one invention” means this invention).

  The present invention relates to an absorbent article provided with a pair of wing portions having adhesive portions on both sides in the longitudinal direction of the main body, in the longitudinal direction together with the packaging material in a state where the wing portions are folded on the skin contact surface side of the main body. The packaging structure of the absorbent article is formed by folding and sealing a predetermined portion of the packaging material, and can be peeled from the adhesive portion on the skin contact surface at the rear end portion in the longitudinal direction of the main body. The above-mentioned object is achieved by providing a packaging structure for absorbent articles in which a rear leak-proof sheet is arranged and the adhesive portion is covered with the rear leak-proof sheet (hereinafter referred to as second). The term “invention” refers to this invention).

  According to the packaging structure of the absorbent article of the first and second inventions, the release paper for protecting the adhesive part of the wing part is unnecessary, and the degree of freedom in selecting the adhesive is high. According to the packaging structure of the absorbent article of the second invention, the extension length from the main body of the wing part is further increased while ensuring the width of the region capable of absorbing the liquid, or the main body together with the wing part. Both side portions can be folded toward the skin contact surface side of the main body to form a compact packaging form.

The present invention will be described below based on preferred embodiments with reference to the drawings.
The sanitary napkin 1 packaging structure 10 according to an embodiment of the first invention (hereinafter also referred to as the first embodiment) is obtained by individually packaging the sanitary napkin 1 with a packaging material 9 as shown in FIG. Become.
As shown in FIG. 2, the sanitary napkin 1 (hereinafter also referred to as napkin 1) in the present embodiment includes a main body 5 and a pair of wing portions 6 and 6 extending on both sides in the longitudinal direction of the main body 5. ing.
The main body 5 includes a composite surface sheet 2 constituting a skin contact surface, a back sheet 3 constituting a non-skin contact surface, and a liquid-retaining absorbent 4 interposed between these two layers. Has a vertically long shape.
As shown in FIG. 2, the skin contact surface is a surface [surface shown in FIG. 2 (a)] that is directed to the skin side of the wearer during wearing, out of both surfaces of the absorbent article spread in a flat shape. Yes, the non-skin contact surface is a surface that is directed to the wearing equipment side (the side opposite to the wearer's skin side) of the shorts or the like during wearing, out of both surfaces of the absorbent article expanded in a planar shape [FIG. ))].

  The composite topsheet 2 is composed of a liquid-permeable topsheet 2a and a pair of side leak-proof sheets 2b and 2b joined in a state of being partially overlapped on the left and right sides thereof. The pair of side leak-proof sheets 2b and 2b are arranged along the longitudinal direction on both sides in the longitudinal direction of the main body 5, respectively.

  The pair of wing portions 6, 6 is formed by a side leak-proof sheet 2 b and a back sheet 3 that extend from both side edges of the main body 5. The napkin 1 is arranged in order from one end portion in the longitudinal direction toward the other end portion, a front portion A disposed at a position near the wearer's abdomen at the time of wearing, and an excretion portion facing portion disposed to face the wearer's liquid excretion portion. It can be divided into B and a rear part C arranged at a position close to the wearer's back. The pair of wing parts 6 and 6 are provided in the excretion part facing part B.

  The wing part 6 has an adhesive part 6a formed by applying an adhesive to the surface on the back sheet 3 side. When the napkin 1 is used, the wing portion 6 is bent toward the non-skin contact surface side of the main body 5 and is fixed to the non-skin facing surface side of a wearing tool such as shorts via the adhesive portion 6a. Further, a main body adhesive portion 5a is provided on the non-skin contact surface of the main body 5, and the main body 5 faces the skin of a wearing tool such as shorts through the main body adhesive portion 5a when the napkin 1 is used. It can also be fixed to the surface side. The packaging material 9 in the packaging structure 10 of the present embodiment has been subjected to a peeling treatment, and the main body adhesive portion 5a is stuck to the peeling treatment surface.

The packaging structure 10 of this embodiment is obtained, for example, as follows: First, as shown in FIG. 3A, the napkin 1 is placed on the packaging material 9. The wing part 6 is bent toward the skin contact surface side of the main body 5 along both side edges of the main body 5.
Next, the napkin 1 is folded in the longitudinal direction together with the packaging material 9 at a position behind the adhesive portion 6 a in the longitudinal direction, more specifically, a position slightly behind the wing portion 6. The folding line (folding axis) at this time is indicated by L1 in FIG. By this bending, the side leak-proof sheet 2b is laminated on the adhesive part 6a of the wing part 6 and covers the adhesive part 6a. And the wing part 6 and the side leak-proof sheet | seat 2b are adhere | attached so that peeling is possible via the adhesion part 6a. The adhesive portion 6a in the present embodiment is entirely covered with the side leak-proof sheet 2b.

Next, the napkin 1 is folded in the longitudinal direction together with the packaging material 9 at a position in front of the adhesive portion 6 a in the longitudinal direction, more specifically, a position slightly ahead of the wing portion 6. The folding line (folding axis) at this time is indicated by L2 in FIG.
And while sealing both sides 91 and 91 of the packaging material 9 extended in the width direction outward from the both-sides edge of the napkin 1 of the folded state by well-known joining methods, such as embossing, one end of the packaging material 9 The wrapping structure 10 of the napkin 1 shown in FIG. 1 is obtained by fixing the edge 92 to the opposite surface with a known tab tape 11.

The pair of side leakage preventing sheets 2b in the present embodiment has a surface on the side covering the adhesive portion 6a [a surface appearing in FIG. 2 (a), hereinafter also referred to as a skin facing surface of the side leakage preventing sheet 2b]. In the state where the napkin is folded and packaged as shown in FIG. 1, the adhesive portion 6a is covered and protected, while the napkin 1 is used, the unfolded napkin is simply unfolded. It can be easily peeled off from the adhesive portion 6a.
Thus, by covering and protecting the adhesive portion 6a with the side leak-proof sheet 2b, it is possible to eliminate the need for release paper that complicates the manufacturing process and increases costs. Simple.

The side leak-proof sheet 2b is subjected to a peeling process on at least a portion 6b overlapped with the adhesive portion 6a on the skin facing surface. In this embodiment, the peeling process is performed to the whole skin opposing surface of the side leak-proof sheet 2b.
The side leak-proof sheet 2b is formed, for example, by subjecting a base sheet to a peeling process.
Examples of the base sheet include a nonwoven fabric, a resin film, a laminate of a resin film and a nonwoven fabric, a laminate of a resin film and paper, and the like.
In the release treatment, for example, a known release agent such as silicon resin, fluorine resin, or ethylene tetrafluoride resin is applied to one surface of the base sheet. For the coating of the release agent, for example, a coater coating or spray coating method for forming a thin film on the surface, a method for stabilizing the release film by ultraviolet irradiation or heat treatment, and the like can be used. Moreover, the skin opposing surface of a base material sheet can also be comprised from the fiber processed with the release agent.

The side leak-proof sheet 2b is preferably formed with unevenness on the skin-facing surface by embossing from the viewpoint of preventing discomfort when touching the wearer's skin and irritation to the skin.
Moreover, from the same viewpoint, it is preferable that the side leak-proof sheet 2b consists of a laminated body of a resin film and a nonwoven fabric, and the resin film comprises the skin opposing surface.
As the nonwoven fabric used in this case, those produced by various production methods can be used, but a smooth spunbonded nonwoven fabric is preferred from the viewpoint of ease of fixation during lamination.
Further, even when the side leak-proof sheet 2b is made of such a laminate, it is more preferable that unevenness is formed by embossing on the skin facing surface, and the form of the unevenness formed by embossing is further clarified. From the viewpoint of doing, an air-through nonwoven fabric is preferable.
Moreover, it is preferable that the side leakproof sheet 2b is comprised with the nonwoven fabric etc. which consist of the fiber processed with the release agent from the same point. The nonwoven fabric in this case can use the thing by various well-known manufacturing methods.
As the pressure-sensitive adhesive for forming the pressure-sensitive adhesive portion 6a, various known materials can be used without particular limitation. For example, various pressure-sensitive adhesives including those described in Patent Documents 1 and 2 can be used.

  As another means for making the adhesive part 6a of the wing part peelable, an adhesive material that forms an adhesive part 6a of the wing part by embossing the part in contact with the adhesive part 6a in the side leak-proof sheet 2b. It is possible to use a method of forming a film at the contact site (hereinafter also referred to as a wing adhesive) or improving the surface strength so that material destruction does not occur during peeling. In particular, when the above-described concavo-convex processing is performed, the contact area with the wing adhesive material is reduced, and therefore, it is more preferable because the wing adhesive material and the side leak-proof sheet can be easily peeled off. Further, as the wing adhesive material, it is preferable to use a flexible adhesive material used for a foaming agent or the like from the viewpoint of facilitating peeling. However, a silicon-based interface at the contact portion with respect to the side leak-proof sheet in the adhesive portion 6a. When the activator is applied, or when the surfactant is kneaded into the fiber or film of the side leak-proof sheet and bleeded out, it is the same as the side leak-proof sheet subjected to the peeling treatment. A variety of adhesives can be used.

The pair of side leak-proof sheets 2b and 2b are preferably formed entirely from the same material because the embossing molding conditions are constant and it is not necessary to increase the number of components. . Here, that the side leak-proof sheet 2b is formed from the same material means that the base sheet is the same. If the base sheet is the same, the side leak-proof sheet 2b is uneven. Even if there is a portion that is not uneven with the portion, or there is a portion that has been subjected to the peeling treatment and a portion that has not been subjected to the peeling treatment on the side leak-proof sheet 2b, both portions are made of the same material.
In the present embodiment, the pair of side leak-proof sheets 2b and 2b are integrated with the rear leak-proof sheet 7 at the rear end of the napkin 1 to form a single U-shaped sheet. The portion connecting the pair of side leak-proof sheets 2b and 2b (the region between the dotted lines 71 and 71) is not included in the part of the sheet 2b in the case of the entire side leak-proof sheet 2b in the first invention. .

Each of the pair of side leak-proof sheets 2b, 2b in the present embodiment is joined to the top sheet 2a by heat sealing at substantially the same position as the positions of both side edges in the longitudinal direction of the absorber 4. Each of the pair of side leak-proof sheets 2 b and 2 b is joined to the back sheet 3 or the top sheet 2 a joined to the back sheet 3 at the peripheral edge of the napkin 1. The side leak-proof sheet 2b is basically water-impermeable or hardly water-permeable and has a function of preventing liquid leakage from both sides in the longitudinal direction of the napkin.
In the width direction of the napkin 1, the joint between the side leak-proof sheet 2b and the top sheet 2a is located slightly outside the position of the inner edge 21 of each side leak-proof sheet 2b. The space between the joint portion and the inner edge 21 can be separated from the topsheet 2a. The side leak-proof sheet 2b according to the first aspect of the invention is such that the joint between the side leak-proof sheet 2b and the top sheet 2a and the inner edge 21 of the side leak-proof sheet 2b cannot be separated from the top sheet 2a. It may be bonded to each other by an adhesive or heat seal.

Another embodiment of the first invention will be described with reference to FIG. About this embodiment, a different point from 1st Embodiment mentioned above is mainly demonstrated, About the same point, the same code | symbol is attached | subjected and description is abbreviate | omitted. For points that are not particularly described, the description regarding the first embodiment described above is applied as appropriate. In the sanitary napkin 1A according to the present embodiment, as shown in FIG. 4, each of the pair of side leak-proof sheets 2b and 2b, The elastic member 22 is fixed along each longitudinal direction, and when the napkin 1A is taken out from the packaging structure, one side of each of the side leakproof sheets 2b and 2b in the excretory part facing part B due to the contraction of the elastic member 22 The edge 21 side stands up.
Thereby, the capture | acquisition performance of the liquid which flows on the surface sheet 2a by the side leak-proof sheet 2b improves, and leak prevention performance improves.
On the other hand, in the region 23 (hereinafter, referred to as the adhesive portion covering region 23) including the portion 6b overlapped with the adhesive portion 6a of the wing portion 6 in the longitudinal direction of the side leakproof sheets 2b, 2b, the side leakproof sheet 2b is It is designed not to stand up. Thereby, it can prevent that the width | variety of the side leak-proof sheet 2b which should coat | cover the adhesion part 6a can reduce, and it can prevent that a part of adhesion part 6a is no longer covered with the side leak-proof sheet 2b.

  In addition, the side leak-proof sheet 2b in this embodiment is the surface sheet 2a in which the substantially whole area of the width direction is located in the area | region 24 in FIG. 4 including the adhesion part coating | coated area | region 23 and the area | region before and behind that. It is joined and fixed to the back sheet 3 so that the side leak-proof sheet 2b does not stand up.

  Next, an embodiment of the second invention will be described with reference to FIG. In the following description, differences from the first embodiment described above will be mainly described, and the same points will be denoted by the same reference numerals and description thereof will be omitted. For the points that are not particularly described, the description regarding the first embodiment described above is appropriately applied.

In the sanitary napkin 1 </ b> B according to the present embodiment, the rear leakage preventing sheet 7 subjected to the peeling treatment is disposed on the skin contact surface at the rear end portion D in the longitudinal direction of the main body 5. In the state where the napkin 1B is folded in the order of the fold lines L1 and L2 and packaged with the packaging material 9, the adhesive portion 6a of the wing portion 6 is covered with the rear leak-proof sheet 7.
As for the rear part leak-proof sheet 7, the peeling process is given to the part 6b overlaid at least on the adhesion part 6a in the skin opposing surface turned to a wearer's skin side at the time of wear. Thereby, the rear part leak-proof sheet 7 can be peeled with respect to the adhesion part 6a.
In the present embodiment, the pair of side leak-proof sheets 2 b and 2 b form a single U-shaped sheet continuously with the rear leak-proof sheet 7 at the rear end D of the napkin 1. In the second invention, the rear leak-proof sheet 7 includes a pair of side leak-proof sheets 2b, 2b extending in the direction of the rear end D (the part located behind the dotted line 72 in FIG. 5).

In the present embodiment, the entire area of the skin-facing surface of the U-shaped sheet composed of the rear leak-proof sheet 7 and the pair of side leak-proof sheets 2b and 2b is peeled, but only the rear leak-proof sheet 7 or Only a part including the part 6b superimposed on the adhesive part 6a may be peeled off. As a sheet material and a release agent that can be used for the rear leak-proof sheet 7, the same material as the side leak-proof sheet 2b in the first embodiment can be used.
By covering the adhesive portion 6a with the rear leak-proof sheet 7, the release paper for protecting the adhesive portion 6a can be made unnecessary. In addition, by covering the adhesive part 6a with the rear leak-proof sheet 7, the extension length of the wing part 6 from the main body 5 is increased while ensuring the wide width of the region capable of absorbing the liquid in the excretory part facing part B. Can be bigger.

FIG. 6 is a diagram showing another embodiment of the second invention. The embodiment shown in FIG. 6 is different from the embodiment shown in FIG. 5 in that both side portions 51, 51 of the main body 5 are bent to the skin contact surface side of the main body 5 together with the wing portions 6, 6. The points not particularly described in the present embodiment are the same as those in the embodiment shown in FIG.
Also in the embodiment shown in FIG. 6, the rear leak-proof sheet 7 is disposed on the skin contact surface at the rear end in the longitudinal direction of the main body 5, and the adhesive part 6 a of the wing part 6 is covered with the rear leak-proof sheet 7. Has been. By covering the adhesive portion 6a with the rear leak-proof sheet 7, the release paper for protecting the adhesive portion 6a can be made unnecessary. In addition, by covering the adhesive portion 6a with the rear leak-proof sheet 7, even if the side portions 51 and 51 of the main body 5 are folded together with the wing portions 6 and 6, the adhesive portion 6a is not sufficiently covered, and thus more compact. A simple packaging structure.

  The rear leak-proof sheet 7 in the second invention (the same applies when the rear leak-proof sheet is provided in the absorbent article of the first invention) is such that the front end edge 73 side stands up on the top sheet 2a. This is preferable because the capturing performance of the flowing liquid is improved and the post-leakage prevention performance is improved. As a method of erecting the front end edge 73 side of the rear leak-proof sheet 7, the rear leak-proof sheet having elastic elasticity is fixed to a portion located on the outer peripheral portion of the main body 5 in a state where the rear leak-proof sheet is extended in the width direction of the napkin 1. After that, the rear leak-proof sheet having unevenness obtained by shrinking or passing a flat sheet between the uneven rolls is partially applied to the rear end portion of the main body 5 so that the uneven shape is maintained. A fixing method, a rear leak-proof sheet is disposed at the rear end portion of the main body 5, and a position separated from the front end edge 73 is joined to a member therebelow while being compressed from the skin facing surface side by hot embossing or the like. Methods and the like.

The packaging structure of the absorbent article of the present invention (first and second inventions) is not limited to the above-described embodiments, and can be variously modified without departing from the spirit of each invention. For example, the rear leak-proof sheet (portion between dotted lines 71 and 71) in the sanitary napkin 1 described above can be eliminated (in the first invention). Moreover, the side leak-proof sheets 2b and 2b in the sanitary napkins 1B and 1C described above can also be eliminated (in the second invention).
Moreover, the adhesion part 6a and the main body adhesion part 5a may each be divided | segmented into plurality in the longitudinal direction and / or the width direction of a napkin, and the main body adhesion part 5a can also be abbreviate | omitted. Moreover, the side leak-proof sheet | seat 2b, 2b may be distribute | arranged only to the excretion part opposing part B and the back part C of a napkin, or only the back part C. FIG.

  Further, as means for making the rear leak-proof sheet 7 in the second invention peelable from the adhesive part 6a of the wing part, means other than the peeling treatment described above with respect to the first invention (unevenness formation by embossing and the rear part of the adhesive part 6a) A device for contacting the leak-proof sheet 7) may be employed.

  Moreover, in the packaging structure 10 of the absorbent article of 1st Embodiment, although the peeling-treated packaging material is used and it has the advantage that the taking-out of an absorbent article becomes smooth, release paper or a peelable film of It is also possible to use a material integrated with a non-peeling packaging material by applying an adhesive material to the non-peeling surface side. In this case, it is easy to seal the packaging material by heat sealing, and there is an advantage that the degree of freedom in manufacturing is improved even during processing of the absorbent article. Further, the main body adhesive portion 5a provided on the non-skin contact surface of the main body and the main body peeling material separate from the packaging material are fixed in a peelable state, and the absorbent article is folded together with the main body peeling material. In the case of the post-packaging structure, the packaging structure after taking out the folded absorbent article has an advantage that it can be used for disposal of the used absorbent article.

  Further, the description omitted in one embodiment and the requirements of only one embodiment can be applied to other embodiments as appropriate, and the requirements in each embodiment can be appropriately applied between the embodiments. Can be substituted for each other.

  In addition to sanitary napkins, the absorbent article in the present invention may be other absorbent articles such as a panty liner (cage sheet), an incontinence pad, and the like.

FIG. 1 is a plan view showing a packaging structure for a sanitary napkin according to an embodiment of the first invention. 2 is a schematic view showing the sanitary napkin in the packaging structure of FIG. 1, FIG. 2 (a) is a plan view showing the surface sheet side (skin contact surface side), and FIG. 2 (b) is the back sheet side ( It is a bottom view which shows the non-skin contact surface side). FIG. 3 is a developed view for explaining the configuration and manufacturing procedure of the packaging structure of FIG. FIG. 4 is a schematic plan view showing a sanitary napkin according to another embodiment of the first invention. FIG. 5 is a developed plan view showing a state in which a sanitary napkin packaging structure according to an embodiment of the second invention is developed. FIG. 6 is a developed plan view showing a developed state of a sanitary napkin packaging structure according to another embodiment of the second invention.

Explanation of symbols

10 Packaging structure for sanitary napkins (packaging structure for absorbent articles)
1,1A-1C Sanitary napkin (absorbent article)
2 Composite surface sheet 2a Surface sheet 2b Side leak-proof sheet 3 Back surface sheet 4 Absorber (absorbing layer)
DESCRIPTION OF SYMBOLS 5 Main body 6 Wing part 6a Adhesion part 7 Rear part leak-proof sheet 9 Packaging material A Front part B Excretion part opposing part C Back part D Rear end part

Claims (3)

It has a top sheet, a back sheet, and an absorbent body interposed between the two sheets, and includes a main body and a pair of wing portions extending on both sides in the longitudinal direction of the main body, and each of the pair of wing portions is an adhesive portion. An absorbent article having a pair of the wing portions folded in the longitudinal direction together with the packaging material in a state in which each of the pair of wing portions is folded on the skin contact surface side of the main body, and sealing a predetermined portion of the packaging material An article packaging structure,
A pair of side leak-proof sheets that can be peeled from the adhesive portion are arranged on the skin contact surfaces on both side portions in the longitudinal direction of the main body, and the adhesive portion is disposed when the side leak-proof sheet is worn. It is covered on the part located on the back side from the wing part and is in direct contact with the part over the entire length of the adhesive part in the longitudinal direction of the main body,
Each of the pair of side leak-proof sheets is bonded to the back sheet or the top sheet bonded to the back sheet at the peripheral edge of the absorbent article, and the side edges of both sides of the absorbent body in the longitudinal direction. A joining portion joined to the topsheet by heat sealing at a position substantially the same as the position, and the joining portion is located outside the position of the inner edge of the side leakproof sheet in the width direction of the absorbent article. An absorbent article packaging structure in which the side leakage preventing sheet in the excretory part facing part of the absorbent article is located between the joint part and the inner edge and can be separated from the top sheet.   Each of the side leak-proof sheets is configured such that an elastic member is fixed along the longitudinal direction so that one side edge side of the side leak-proof sheet stands, and the side leak-proof sheets are stacked on the adhesive portion in the longitudinal direction of the side leak-proof sheet. The packaging structure for absorbent articles according to claim 1, wherein the side leak-proof sheet does not stand up in the region including the portion.   The packaging structure of an absorbent article according to claim 1 or 2, wherein the entire side leakproof sheet is formed of the same material.

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