JP4526026B2 - Absorbent article, packaging structure - Google Patents

Description

TECHNICAL FIELD The present invention relates to an absorbent article and a package structure thereof, and relates to an absorbent article such as a sanitary napkin and a urine removing pad used by attaching to an underwear (shorts), and an absorbent article in which the absorbent article is wrapped with a packaging sheet. it relates to the packaging structure.

Absorbent articles such as sanitary napkins and urine removal pads that are generally used are wrapped in a packaging sheet with the back sheet folded so that it is on the outside. Use the product by attaching it to underwear.
Therefore, sanitary napkins and the like are provided with an adhesive layer as an attachment means to the underwear on the back surface that is not in contact with the skin, i.e., the back sheet side, so that the adhesive layer is not bonded to the packaging material in the packaged state. In general, a release sheet or a release layer formed on the inner surface of a packaging material is joined.

By the way, in the absorbent article of the type that is attached to underwear such as a sanitary napkin, an absorbent article that does not expand and contract has been used, but this does not move following the deformation of the shorts (underwear). There is a problem that it may shift or float or peel off after being fixed, and may not be comfortable during wearing.
Accordingly, various absorbent articles having stretchability have been proposed. For example, in the stretchable absorbent product described in Patent Document 1, an absorbent core (core) made of an elastically stretchable absorbent material. And an absorbent body in which the absorbent core is covered with an expandable top sheet and a back sheet, respectively, and can be expanded and contracted in one or two directions, and has flexibility in the longitudinal direction.

Moreover, in the sanitary napkin described in Patent Document 2, as described in Patent Document 1, a stretchable top sheet, a stretchable back sheet joined to the top sheet at the periphery, and these The absorbent body accommodated between the top sheet and the back sheet is composed of a stretchable absorbent core provided with a knit material and subjected to bellows processing, and the absorbent body can be stretched in a direction inclined in the direction other than the longitudinal direction. I am doing so.

  These conventional absorbent articles can follow the deformation of the shorts while attached to, for example, shorts (underwear). However, although these absorbent articles are provided with stretchability, they are used as they are attached to shorts as they are without stretching, and because they have stretchability, it is difficult to fix to shorts, It may be distorted and fixed, resulting in misalignment or discomfort.

In Patent Document 3, an adhesive material layer provided on a sanitary napkin is provided in the middle so that the release paper can be easily peeled even when the adhesive material layer of an absorbent article such as a sanitary napkin has a large area. The release paper divided into two is described.
However, the sanitary napkin described in this document does not expand and contract, and if a piece of release paper is attached to a large-area adhesive material layer, the parts of the adhesive material that have been peeled off will adhere to each other This is intended to prevent this, and does not call for the present invention described below.

Japanese National Patent Publication No. 10-508225 Special table 2004-515817 Registration No. 30547767

The first object of the present invention has been made in view of the above-mentioned conventional problems, and it is easy to put on an absorbent article such as a sanitary napkin to a crotch part of a shorts, and the shape of the crotch part is easy to wear. It is to be able to attach by adjusting its shape according to.
The second object is to provide an absorbent article that is excellent in wearing feeling and does not cause displacement or peeling following the deformation of shorts during wearing.

The invention of claim 1 is provided with a liquid-permeable surface sheet on the skin contact surface side and a liquid-impervious back sheet on the non-skin contact surface side, and is sealed between the two sheets. a stretchable absorbent article for use in mounting the undergarment comprising a absorber, comprising a release sheet covering the adhesive layer and the adhesive layer made of adhesive to the undergarment attachment surface of the back sheet, stretching possible when the longitudinal ends Ru is the tensile elongation recess center portion, is attachable in a state that matches the crotch portion shape of the undergarment, wherein the adhesive material, the adhesive material open when extending the absorbent article some release sheet to expose mounting a and the release sheet can be separated into longitudinal end side so as to expose a portion of the adhesive material to the intermediate, front surface sheet is formed by embossing Non-woven fabric with many heat fusion parts Rannahli, fibers constituting the nonwoven fabric between the heat fusion portion, projecting in the thickness direction of the nonwoven fabric forms a plurality of raised portions on the upper and lower surfaces of the nonwoven fabric, the lower surface of the nonwoven fabric The formed raised portion has a shape in which the base portion projects in the plane direction of the nonwoven fabric, and the lower fiber layer of the topsheet is a latent crimpable fiber having a fineness of 1 to 7 dtex in which crimps are expressed. The backsheet material is a microporous sheet or urethane obtained by stretching and kneading an inorganic filler in an olefinic resin such as polyethylene or polypropylene by fine concavo-convex processing, and the absorbent is cotton-like pulp and synthetic pulp is a product layer was fiber stacking pulp, and has a cotton-like pulp or synthetic pulp is a pulp partially fixed the product layer, the adhesive layer, the undergarment attachment surface Whether or adhesive using an adhesive material having a stretchability was discontinuously coated, characterized in that.
A second aspect of the present invention is the absorbent article according to the first aspect, wherein the first and second release sheets each cover both ends in the longitudinal direction of the adhesive material with a predetermined width so as to leave the adhesive material exposed therebetween. And a third release sheet that covers the exposed adhesive material.
The invention of claim 3 is the absorbent article according to claim 2, wherein the third release sheet is bonded to a packaging sheet for packaging the absorbent article.
The invention according to claim 4 is the absorbent article according to claim 2, wherein the third release sheet is a release-processed packaging sheet for packaging the absorbent article.
The invention according to claim 5 is a packaging structure for absorbent articles, wherein the absorbent article according to claim 2 is packaged by the packaging sheet according to claim 3 or 4.

According to the present invention, the absorbent article can be attached by adjusting its shape in accordance with the width of the center of the crotch portion of the shorts, so that it is easy to mount, increasing the sense of unity with the crotch portion, and shifting. There will be no peeling and no underwear will be soiled.
In addition, since the absorbent article is fixed to the shorts in the stretched state, the absorbent article does not sag, does not become stiff or wrinkled when worn, and is integrated with the shorts to provide a good feeling of wear. can get.

As one embodiment of an absorbent article according to the present invention, a sanitary napkin will be described with reference to the accompanying drawings.
FIG. 1 is a plan view showing a sanitary napkin which is an embodiment of an absorbent article according to the present invention in comparison with when it is not used.
The sanitary napkin 10 according to this embodiment includes a liquid-permeable top sheet 10a, a liquid-impervious back sheet 10b, and an absorbent body that is sealed between both sheets by a sheet seal or the like. The adhesive material 12 for joining to shorts at the time of wear is given to the surface on the opposite side to the skin contact surface of the sanitary napkin 10, that is, the back sheet side.

As shown in FIG. 1A, the release sheets 14a and 14b joined on the adhesive material 12 are in contact with each other in the middle of the napkin 10 so as to cover the left and right halves of the sanitary napkin 10 (or the ends are slightly overlapped). It may consist of two sheets. The sanitary napkin 10 is extendable. When the sanitary napkin 10 is attached to the shorts, if the release sheets 14a and 14b are attached to the sanitary napkin 10 and the front and rear (left and right in the drawing) are gripped, the napkin 10 is stretched. As shown in FIG. 1B, the central portion of the napkin 10 is elongated and the central side end portions of the release sheet 14 are opened to the left and right, and a part of the adhesive 12 is exposed from the gap. The exposed adhesive material in the central region may be continuous as will be described later, but is preferably applied discontinuously in order to facilitate expansion.
Incidentally, the sanitary napkin 10, ease certain have combined to crotch shape preferably has a retractable from the combined ease to deformation of shorts at the time for the wear. Also, release sheet may also be a single package sheet is not limited to those described above can be easily cleaved by perforations, and as shown in FIG. 1C, 2 sheets of release sheet 14a, and 14b center It may have a structure in which the upper and lower ends 14c in the center shown in FIG.

  The wearer adjusts the sanitary napkin 10 to the width of the crotch portion 1a of his shorts 1 in this way, and grips and stretches the release sheets 14a and 14b at both longitudinal end portions 11 to arrange the width and arrangement of the crotch portion. When the shape of the napkin for use 10 becomes substantially the same, as shown in FIG. 2A, the exposed adhesive material layer 12 is lightly pressed and joined to the crotch portion 1a of the shorts, and then, as shown in FIG. 2B. In addition, the release sheets 14 a and 14 b attached to both sides in the longitudinal direction of the absorbent article are peeled off, and the entire adhesive material layer 12 is joined to the shorts 1.

3 shows a sanitary napkin according to another embodiment of the present invention, FIG. 3A is a plan view thereof, and FIG. 3B is a sectional view thereof.
As shown in the figure, the sanitary napkin of this embodiment has a first width and a predetermined width from the front and rear ends 11a so that, for example, an intermediate portion is exposed to the adhesive material 12 formed on the back surface of the sanitary napkin 10. The second release sheet, that is, the front and rear release sheets 14a and 14b are joined, and a third release sheet (center release sheet) 14c, which is a means for covering the adhesive, is joined to the exposed central portion.

  The central release sheet 14 c is joined to the packaging sheet 20 and is configured to be peeled off simultaneously when the sanitary napkin 10 is taken out from the packaging sheet 20. Instead of using the central release sheet 14c, the packaging sheet 20 itself is subjected to a peeling treatment, and the packaging sheet 20 is bonded to the adhesive material 12, and the packaging sheet 20 is opened and removed, and at the same time, the central portion of the napkin 10 is removed. The adhesive material layer 12 may be exposed.

FIG. 4A shows a plan view of the sanitary napkin 10 of FIG. 3 with the central release sheet removed. When pulled back and forth (left and right in the figure) in this state, the central part becomes thin as shown in FIG. 4B, so that it can be adjusted to a shape that matches the width of the crotch part of the shorts, and is attached to the shorts in this state.
In the sanitary napkin 10 of this embodiment, since the width of the adhesive material 12 at the center between the release sheets 14a and 14b attached to the front and rear of the napkin 10 can be increased, a relatively large area as a slip stopper is obtained. The present invention can also be applied to those provided with the adhesive material 12.

FIG. 5A is a developed perspective view of the sanitary napkin packaging structure of this embodiment.
As shown in the figure, this packaging structure is composed of a sanitary napkin 10 that is an absorbent article and a packaging sheet 20 that is a rectangular packaging material for individually packaging the sanitary napkin 10.
That is, the sanitary napkin packaging structure 30 includes a sanitary napkin 10 integrated with the packaging sheet 20, and the longitudinal direction of the sanitary napkin 10 in the drawing as shown in FIG. In two folding lines 19 that are divided into three on the right side portion 18, it is bent toward the skin contact surface side of the central portion 17, and both side edge portions 23 and end portions 24 of the packaging material 20 are fastened to seal portions. Is forming.

  The sanitary napkin 10 is coated with an adhesive material over the entire length of the sanitary napkin 10 while leaving the front and rear ends thereof, and as described above, the adhesive material layer 12 is formed on the adhesive material layer 12. The first and second release sheets 14a, 14b and the third or central release sheet 14c are joined together, and the central release sheet 14c is joined integrally to the packaging sheet 20 so that the physiological When the napkin 10 is taken out, it is peeled off from the napkin 10 together with the packaging sheet 10. Instead of the central release sheet 14c, the release sheet is completely integrated with the packaging sheet, that is, the packaging sheet 20 is subjected to a release treatment, and the packaging sheet 20 is joined between the left and right release sheets 14a and 14b. Good.

  The sanitary napkin 10 is folded at two fold lines 19 with the adhesive layer 12 on the front side, and is wrapped in a wrapping sheet 20 in a state where the whole is folded in three. As shown in FIG. It adheres (Note that the organizing napkin can be appropriately folded by two or four folds in addition to the three folds). When the sanitary napkin 10 is used, the knob T is pulled up, the seal portions (FIG. 5A) of the side edges 23 are peeled off, and the sanitary napkin 10 is taken out.

  In the sanitary napkin described above, the top sheet 12a is, for example, described in Japanese Patent Application Laid-Open No. 2004-166849. The surface sheet of the absorbent article can be used.

This surface sheet is made of a nonwoven fabric having a large number of heat-sealed portions formed by embossing, and the fibers constituting the nonwoven fabric project between the heat-fused portions in the thickness direction of the nonwoven fabric, A number of raised portions are formed on each of the upper and lower surfaces, and the raised portion formed on the lower surface side of the nonwoven fabric has a shape in which the base portion projects in the plane direction of the nonwoven fabric.
In addition, the lower fiber layer of the top sheet has a crimped fineness of about 1 to 7 dtex, for example, an eccentric core-sheath composite fiber or side-by-side composite containing two types of thermoplastic polymer materials having different shrinkage rates.・ Contains latent crimpable fibers made of side-type composite fibers. As an example of two types of thermoplastic polymer materials having different shrinkage rates, for example, a combination of an ethylene-propylene random copolymer (EP) and polypropylene (PP) is preferably exemplified.

  As the material of the back sheet 12b, a polyethylene sheet, a polyethylene laminated nonwoven fabric, or the like is used. Desirably, an inorganic filler is added to an olefin resin such as polyethylene or polypropylene, which has liquid impermeability and good air permeability. A microporous sheet obtained by stretching and kneading the melt-kneaded material by fine concavo-convex processing may be used, or the sheet may be composed of a stretchable material such as urethane.

The absorbent body 12c is made of stacked fiber pulp in which cotton-like pulp, synthetic pulp or the like is laminated at a relatively light basis weight, and is formed so as to form a sheet having a substantially uniform thickness on the entire surface. The planar shape of the absorbent body 10c has a substantially rectangular shape that is smaller than the back sheet 10b and is long in the front-rear direction, and the front and rear end edges of the absorbent body 10c have an arc shape that is substantially similar to the front and rear end edges of the back sheet 10b. Yes. Moreover, the laminated pulp is partially fixed by the pressure sensitive adhesive on the top sheet and the back sheet, and the displacement of the pulp can be prevented even when it is stretched.
In addition to the laminated pulp, an absorbent material having improved extensibility, such as blended paper with unevenness or a stretchable material, can be used.

The adhesive material layer 12 is formed on the surface (back sheet) on the side that does not come into contact with the skin, or after being applied to the peeled packaging material 20 and transferred to the back sheet surface 10b. Is done. In this case, it applied discontinuously by considering the expansion and contraction of the back sheet 10b. Or the adhesive material provided with the elasticity can also be used.
As the adhesive material for forming the adhesive material layer, for example, a material having a styrene block polymer, a tackifier and a softener as main components and having a two-phase block structure of a styrene phase and a rubber phase is used. .

  As the release treatment agent, those having a release agent component such as silicone resin, fluorine resin, or octadecyl isocyanate as a main component can be preferably used.

  Preferred examples of the material for forming the packaging material 20 include polypropylene, polyester, polyethylene, polyvinyl alcohol, nonwoven fabric, paper, and composite materials thereof having a thickness of 5 to 50 μm. In the present invention, as the method for forming the release layer, the release treatment agent is applied to the entire inner surface of the packaging material and dried by heating, or sprayed to form a thin film and polymerized and cured by ultraviolet rays or the like. Are preferred.

  Since the center part of the absorbent article according to the present embodiment is depressed by pulling both ends in the longitudinal direction, it can be easily matched with the shape of the crotch portion having a recessed flat shape like shorts. Moreover, since the central part of the adhesive material layer is exposed in that state, the absorbent article can be attached to the shorts by joining the exposed part to the crotch part, and the wearer's Even if the shorts are deformed by movement, the shape deformation can be easily followed. Further, since this absorbent article is stretched and joined to the crotch portion of the shorts, the size can be reduced before extension, which is convenient for carrying and storing.

FIG. 1A is a plan view of a sanitary napkin, FIG. 1A shows an unused state, FIG. 1B shows a used state, and FIG. 1C is a plan view of another sanitary napkin. It is a top view explaining attachment of a sanitary napkin to a crotch part of shorts, FIG. 2A shows an attachment process, and FIG. 2B shows after attachment. FIG. 3A is a plan view and FIG. 3B is a sectional view of a sanitary napkin according to another embodiment of FIG. FIG. 4A shows a state in which the central release sheet of the organizing napkin shown in FIG. 3 is removed, and FIG. 4B is a plan view showing a state in which it is stretched left and right. FIG. 5A is a developed perspective view of a sanitary napkin packaging structure, and FIG. 5B is a perspective view of the packaging structure. .

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Sanitary napkin, 12 ... Adhesive material layer, 14a, 14b ... Left-right release sheet, 14c ... Center release sheet, 20 ... Packaging sheet,
30: Packaging structure for sanitary napkins.

Claims (5)

An underwear comprising a liquid-permeable surface sheet on the skin contact surface side and an absorbent body provided with a liquid-impervious back sheet on the non-skin contact surface side and sealed between the two sheets. An extensible absorbent article to be attached and used,
The back undergarment attachment surface of the sheet comprising the pressure-sensitive material comprising a release sheet covering the adhesive layer and the adhesive layer, stretchable in the longitudinal ends Ru is pulling elongated central portion recess, crotch portion shape of the undergarment Can be installed in accordance with the
A release sheet is attached to the adhesive material so as to open when the absorbent article is extended to expose a part of the adhesive material, and the release sheet exposes a part of the adhesive material in the middle. Separable at both ends in the longitudinal direction ,
Front surface sheet is made of nonwoven fabric having a plurality of heat fusion part formed by embossing, the fibers constituting the nonwoven fabric between the heat fusion portion, projecting in the thickness direction of the nonwoven fabric, the upper and lower surfaces of the nonwoven fabric A plurality of raised portions are formed in each, and the raised portion formed on the lower surface side of the nonwoven fabric has a shape in which the base portion protrudes in the plane direction of the nonwoven fabric,
The lower fiber layer of the surface sheet includes latent crimpable fibers having a fineness of 1 to 7 dtex in which crimps are expressed,
The backsheet material is a microporous sheet or urethane obtained by subjecting an olefin-based resin such as polyethylene or polypropylene to melt-kneading an inorganic filler by a fine uneven process,
Absorber is a fiber stacking pulp product layer flocculent pulp or synthetic pulp,
And has pulp flocculent pulp or synthetic pulp and a product layer is partially fixed,
Adhesive layer, and the or adhesive using an adhesive material with stretch discontinuously applied onto said undergarment attachment surface,
An absorbent article characterized by the above. The absorbent article according to claim 1,
A first release sheet and a second release sheet for covering the both ends in the longitudinal direction of the adhesive material with a predetermined width so as to leave an exposed adhesive material in between; and a third release sheet for covering the exposed adhesive material. Absorbent article characterized. The absorbent article according to claim 2,
The absorbent article, wherein the third release sheet is bonded to a packaging sheet for packaging the absorbent article. The absorbent article according to claim 2,
The absorbent article according to claim 3, wherein the third release sheet is a release-processed packaging sheet for packaging the absorbent article.   A packaging structure for absorbent articles, wherein the absorbent article according to claim 2 is packaged with the packaging sheet according to claim 3 or 4.

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