JP6521298B2 - Pad type absorbent article - Google Patents

Description

  The present invention relates to a pad type absorbent article.

  Production and packaging of pad-type absorbent articles such as pad-type disposable diapers and sanitary napkins, such as urine absorbing pads, which are folded in the longitudinal direction at the final stage of the manufacturing process, and the plurality of folded absorbent articles Some sheets are stacked and inserted into a package in a compressed state for packaging.

  In addition, as disclosed in, for example, Patent Document 1, there is a product having solid gathers on both sides of a pad type absorbent article. In a collecting article having this type of solid gather, it is necessary for the solid gather to stand up to a sufficient height to prevent side leakage of body fluid.

Patent No. 4212989

  However, in the case of a collectable article having a solid gather, as described above, in the case where the product is folded in three in the longitudinal direction and packaged, a fold remains at the fold at the time of use, which causes the solid gather to stand up. It has been found that it may not be sufficient.

  Therefore, the main object of the present invention is to provide a pad type absorbent article capable of erecting a solid gather at a sufficient height in an article folded in three in the longitudinal direction and packaged.

  The present invention which solved the above-mentioned subject is as follows. In addition, as a pad type absorbent article in this invention, pad type disposable diapers, such as a urine absorption pad, a sanitary napkin, etc. are included.

The invention according to claim 1 is
Longitudinally folded in three and packaged in a packaging package;
A body portion provided with an absorbent body for receiving body fluid from the use side and absorbing the body fluid, and solid gathers extending along the longitudinal direction on both lateral sides of the body portion;
The solid gather includes a root portion fixed to the side portion of the main body portion, a free portion freely projecting to the use side, and a fixed portion fixed to the main body portion on the front and rear end side of the free portion. And have
At the three-folded position of the main body portion, a constricted portion is formed which is narrowed on the center side in the lateral direction from the side edge of the main body portion;
Wherein at least a portion of the free portion covers at least a portion of the constricted portion in the lateral direction,
The constituent sheet of the solid gather is an element constituting the root portion and the free portion, and the root portion is fixed to the front side of the main body,
A pad type absorbent article characterized in that at least the constricted portion of the free portion is configured to be rolled around without being fixed to the side edge of the main body and to freely project to the use side. It is related.

In pad-type absorbent articles that are folded in three in the longitudinal direction and packaged in a packaging package, folds remain at the folding points (for example, the positions shown by F1 and F2 in FIG. 1) during use or It has been found that as the absorber tends to fold back, these may cause standing of the solid gather not to be sufficient.
However, in the present invention, at least a portion of the free portion laterally covers at least a portion of the constricted portion 23A (see FIGS. 1 and 5). As a result, as shown in the example of FIG. 5, at the position of the constricted portion 23A, the gather sheet 24s constituting the free portion of the solid gather 24 bites into the constricted portion 23A by its standing force. It will be.
Finally, as shown on the left side of FIG. 5 by the rising force of the gather sheet 24s corresponding to the constricted portion 23A, the side portion of the main body portion 1 (in the embodiment, the liquid impermeable sheet 21 and the liquid permeability The three-dimensional gather 24Y (gather sheet 24s) is erected with the deformation that raises the side portion of the sheet 22).
On the other hand, at positions other than the constricted portion 23A, as shown on the right side of FIG. 5, the free portion of the solid gather 24X becomes resistance at the side edge of the main body 1, particularly the (semi-rigid) absorber 23 Therefore, normally, it does not stand up as high as the solid gathers 24Y at the position of the constricted portion 23A.
As described above, according to the embodiment of the present invention, the rising of the solid gather at the folding point becomes more reliable and the rising failure is improved, so that the side leakage hardly occurs.
Further, as shown in the standing form example of the solid gather 24Y in FIG. 5, the cross section of the absorber 23 and the solid gathers 24Y and 24Y on both sides is substantially U-shaped, which makes it easy to fit the wearer's body .

  The free portion is provided with a gather elastic member fixed in a state of being stretched in the front-rear direction with respect to its constituent sheet.

  The solid gathers may be, for example, a stretchable sheet in which the sheet material is stretchable, but the form is economical.

  It is desirable that the gather elastic member be located on the center side of the side edge of the absorber in a state in which the article is elongated in the front-rear direction against the contraction force of the gather elastic member.

When the gather elastic member is located on the center side from the side edge of the absorber, the rising force by the gather elastic member brings the rising wall of the gather sheet closer to the center side, and as a result, the gather sheet is constricted. It is suitable for cutting into

The constituent sheet of the solid gather is an element constituting the root portion and the free portion, and the root portion is fixed to the front side of the main body,
In at least the constricted portion of the free portion, it can be configured to be rolled around and freely protruded to the use side without being fixed to the side edge of the main body portion.

  Although the root portion of the solid gather may be fixed to the back side of the main body portion, the root portion is fixed to the front side of the main body portion, and at least the constricted portion of the free portion at the side edge of the main body portion When it is configured so as to turn around without being fixed and to freely protrude to the use side, the erecting force of the solid gathers turns around the side edge of the main body while deforming the side of the main body and is free to the use side It is suitable for exerting the above-mentioned effects of the present invention.

  On the other hand, the main body portion is formed with a line-like frangible portion extending outward from the center in the lateral direction, which extends close to, contacts, or exceeds the three-fold line portion connecting the constricted portions. It is desirable to do.

  When the foldable portion is formed, when the pad type absorbent article is developed from the three folds back and forth, if the two foldable portions attempt to fold back, it becomes to support the three fold line portion, and Foldback is reduced, and as a result, it is desirable to secure rising of solid gathers.

  It is preferable that the V-shaped portion is formed by the easily broken portion extending from the center in the lateral direction to one side and the easily bent portion extending from the center in the lateral direction to the other side.

  It is preferable that the easily bendable portion form the reverse V-shape as viewed from the center in the front-rear direction and the end edge side. On the other hand, even if forming an inverted V shape by looking at the center side in the front-rear direction from the end edge side, there is an effect of reducing the folding back at the three-folded line portion, it is difficult to secure desired deformation of the main body.

  As described above, according to the present invention, in an article which is folded in three in the longitudinal direction and packaged, a solid gather can be advantageously raised to a sufficient height.

It is a top view which shows the surface side of the unfolded state of a pad type absorbent article. It is a top view which shows the back side of the unfolded state of a pad type absorbent article. It is the 3-3 arrow sectional drawing of FIG. It is 4-4 arrow sectional drawing of FIG. It is 5-5 arrow sectional drawing of FIG. It is 6-6 arrow sectional drawing of FIG. It is a schematic diagram showing various forms of a neck part. It is a top view which shows an example of an easily foldable part. It is a top view which shows the example of another easily bendable part. It is a top view which shows another example of an easily foldable part. It is a schematic diagram of the modification of a main part. It is a top view of an example of a sanitary napkin. It is a general | schematic cross-sectional view of the center of front-back direction. It is a general | schematic cross-sectional view of the front-back direction end part. It is a schematic diagram of an example of standing up of solid gather.

Hereinafter, an embodiment of the present invention will be described with reference to the attached drawings.
1 to 11 show a disposable diaper as a pad type absorbent article. The bonded portion of the material can be formed by a hot melt adhesive, heat seal, ultrasonic seal, and in the illustrated embodiment, the adhesive portion is indicated by small dots (grayed).

  The illustrated pad type absorbent article is assumed to be used by being laid on the inner surface of an outer such as a disposable diaper or cloth underwear, and the crotch C, the front body F and the back body B formed before and after the crotch C The In addition, "the crotch" means the part made to correspond to the crotch of the body at the time of use, and it is an intermediate part including the central part in the front-rear direction in almost many products. The dimensions of each part can be appropriately determined. For example, in the case of a product for adults, the total article length L (longitudinal direction length) can be about 450 to 630 mm, and the article total lateral width W can be about 135 to 320 mm. The crotch C, the front body F and the back body B are not fixed ones, and are not conceptual.

  The illustrated pad-type absorbent article includes an absorbent body 23 and a main body 1 capable of absorbing body fluid from the use side (upper side in FIG. 5).

  As necessary, as shown in FIGS. 2 and 3, in order to prevent the displacement of the product when worn, the displacement prevention portion 30 can be provided on the main body portion 1.

  The anti-slip portion 30 is only a non-slip function such as rubber other than those that can be detachably fixed to the main body 1 or the outer like a hook material (male material) or adhesive of a mechanical fastener (surface fastener). It can also be done. As the pressure-sensitive adhesive, a pressure-sensitive adhesive which is less likely to lower in adhesive force even when being attached to and detached from a non-woven fabric or a sheet is preferable. Moreover, when using a hook material or an adhesive, the material suitable for attachment or detachment can be used for the opposing site | part of the gap | deviation prevention part 30 in the main-body part 1. As shown in FIG. In the illustrated embodiment, when the displacement prevention portion 30 is formed of a hook material, the outer surface of the main body portion 1 may only be formed of a non-woven fabric. A dedicated target member such as a suitable loop material (female material) or a resin sheet suitable for attachment and detachment of the adhesive may be provided.

  The position of the slip stopper 30 can be determined as appropriate. It is also possible to provide a plurality of strip-like anti-displacement portions continuous from the front end portion to the rear end portion in the lateral direction, or to provide one having a large width (not shown). The displacement prevention portion 30 may be releasably covered with a release sheet (not shown), and may be exposed by releasing the release sheet at the time of use.

The structure of the main body portion 1 is not particularly limited as long as the body portion 1 can absorb the body fluid from the use side, but as shown in the drawing, the absorber 23 is provided on the use (surface) side of the liquid impermeable sheet 21 It is desirable to adopt a structure in which the front side of the body 23 is covered with a liquid permeable sheet 22.
In the embodiment, the main body 1 is further covered with an exterior sheet 25 made of non-woven fabric or the like.

As the absorbent body 23, there are publicly known ones such as a stacked fiber body of pulp fibers, an aggregate of filaments such as cellulose acetate, or a non-woven fabric, and mixing and fixing superabsorbent polymers as necessary. Can be used without particular limitation. If necessary, the absorber 23 can be wrapped by a liquid-permeable packaging sheet 23L such as crepe paper. In addition, the shape of the absorber 23 may be a rectangular shape, or a band-like shape, an hourglass shape, or the like, which is wider than the portion on the relatively front side than the portion on the rear side. The basis weight of the fiber and absorbent polymer in the absorbent 23 can be determined as appropriate, but the fiber basis weight is preferably about 200 to 600 g / m ^2, and the basis weight of the absorbent polymer is about 100 to 300 g / m ² It is preferable to

  Here, the absorber 23 uses a material with higher rigidity as compared to the sheet used elsewhere. In that sense, typically, a piled body of pulp fibers can be mentioned.

The material of the liquid-impermeable sheet 21 is not particularly limited as long as the material is liquid-impermeable, and it is also possible to use a polyethylene film or the like, and a sheet having moisture permeability without impairing the water shielding from the viewpoint of preventing bleeding. Can. The water-impervious and moisture-permeable sheet is, for example, a microporous sheet obtained by melt-kneading an inorganic filler in an olefin resin such as polyethylene or polypropylene to form a sheet, and then stretching the sheet in a uniaxial or biaxial direction. It can be used.
It is desirable that the dimension of the liquid impermeable sheet 21 be the same as the lateral direction of the absorber 23 or be a certain extent to the outside of the peripheral edge.

  The liquid permeable sheet 22 covers the absorber 23 to form an absorbing surface (use side). In the illustrated embodiment, the liquid-permeable sheet 22 extends from the side edge of the absorber 23 to the use side. On the other hand, it may be extended to the side of the absorber 23 to be joined to another member such as the liquid impermeable sheet 21 or the like. As the liquid-permeable sheet 22, a non-porous or non-porous non-woven fabric, a perforated plastic sheet, or the like is used. As raw material fibers constituting the non-woven fabric, synthetic fibers such as olefins, polyesters, and amides such as polyethylene and polypropylene, regenerated fibers such as rayon and cupra, and natural fibers such as cotton can be used.

  At both ends in the front and rear direction of the pad type absorbent article, the liquid permeable sheet 22 is extended to the front and back of the front and rear ends of the absorber 23 and is bonded to the liquid impermeable sheet 21. A flap portion EF (see FIG. 3) is formed.

In the pad type absorbent article according to the present embodiment, solid gathers 24 are extended in the front-rear direction on both sides of the main body 1 in order to enhance fit around the legs and prevent side leakage.
More specifically, in the illustrated example, the solid gather 24 has a folded gather sheet 24s and a gather elastic member 24g provided between the gather sheets 24s as components, and the side portion of the main body 1 Located between the front and rear fixed portions 24C, the free portion 24F projecting from the root portion 24A to the use side of the main body 1, the fixed portions 24C respectively provided on the front and rear end portions, and the front and rear fixed portions 24C. It has a non-fixed rising portion.
The gather elastic member 24g is fixed to at least the free end portion of the free portion 24F in an extended state in the front-rear direction.
In addition, the folded gathers sheet 24s is disposed on the side of the liquid impermeable sheet 21 and the side of the outer covering sheet.

  A plastic sheet or a meltblown non-woven fabric can also be used as a material of the gather sheet 24s, but a non-woven fabric subjected to a water repellent treatment with silicon or the like is suitably used in terms of the feel to the skin. Further, as the gather elastic member 24g, a styrenic rubber, an olefin rubber, a urethane rubber, an ester rubber, polyurethane, polyethylene, polystyrene, styrene butadiene, silicone, polyester etc. And commonly used materials can be used.

In the illustrated example of the free portion 24F, a proximal end portion extending from the root portion 24A toward the lateral center side from the side portions of the liquid impermeable sheet 21 and the liquid permeable sheet 22 and the proximal end portion And the tip end side folded back laterally outward from the tip of the.
The fixing portion 24C is provided with a proximal end fixing means for fixing the inner surface of the proximal end portion and the main body portion 1, and a distal end side fixing means for fixing the outer surface of the distal end portion and the outer surface of the proximal end portion. The front and rear end portions of the free portion 24F are fixed to the main body 1 in a laid-down state by the fixation by the proximal end fixing means and the distal end side fixing means.

  As the proximal end fixing means and the distal end fixing means, a hot melt adhesive, a hook material (male material) of a mechanical fastener (surface fastener) detachably fixed, an adhesive, or the like can be used. The proximal end fixing means is desirably provided on the inner surface of the proximal end portion, but may be provided on the outer surface of the main body 1 (the liquid permeable sheet 22 in the illustrated embodiment) or on both sides. The distal fixing means is preferably provided on the outer surface of the distal portion, but may be provided on the outer surface of the proximal portion, or on both of them.

  The three-dimensional gather may be one that stands upright on the side in the lateral direction without being folded outward in the lateral direction. Besides, an appropriate three-dimensional gather structure can be adopted.

  Although the operation and effect in the present invention or the embodiment are as described above, they will be described without duplication.

In the present invention, at least a portion of the free portion laterally covers at least a portion of the constriction 23A (see FIGS. 1 and 5) (in the illustrated embodiment, as illustrated by FIG. 1), the constriction 23A Covering the whole of). As a result, as shown in the example of FIG. 5, at the position of the constricted portion 23A, the gather sheet 24s constituting the free portion 24F of the solid gather 24 bites into the constricted portion 23A by its standing force. ) Would be.
Finally, the standing force of the gather sheet 24s corresponding to the constricted portion 23A causes the side of the main body 1 (the side of the liquid-permeable sheet in the embodiment) to stand up as shown on the left of FIG. While being deformed, the three-dimensional gather 24Y (gather sheet 24s) stands up.
On the other hand, at positions other than the constricted part 23A, the free part 24F of the solid gather 24X serves as a resistance of the side part of the main body part 1, particularly the (semi-rigid) absorber 23, usually It does not stand as high as the solid gather 24Y at the position.
As described above, the rising of the solid gather at the folding point is ensured, and the rising failure is improved, so that the side leakage hardly occurs.
Further, as shown in the standing form example of the three-dimensional gather 24Y in FIG. 5, the cross-sectional shape is substantially U-shaped by the absorber 23 and the three-dimensional gather 24Y on both sides, which facilitates fitting to the wearer's body.

In a state in which the article is stretched in the front-rear direction against the contraction force of the gather elastic member 24g (see FIG. 1), at least a portion of the gather elastic member is located on the center side from the side edge of the absorber (see FIG. (See also FIG. 6).
When the gather elastic member 24g is positioned on the center side of the side edge of the absorber, the rising force of the gather elastic member 24g brings the rising wall of the gather sheet 24s closer to the center, and as a result, the gather sheet 24s Are suitable for biting into the neck portion 23A.

  The constituent sheet 24s of the solid gather 24 is an element constituting the root portion 24A and the free portion 24F, the root portion 24A is fixed to the back side of the main body 1, and at least the constricted portion 23A of the free portion 24F is the main body Without being fixed to the side edge of the part 1, it can be configured to be rolled around and freely projected to the use side.

  Although the root portion 24A of the solid gather may be fixed to the back side of the main body 1, the root portion 24A is fixed to the front side of the main body 1, and at least in the constricted portion 23A of the free portion 24F, FIG. As shown on the left side, the solid gathers 24 (24F) is configured to move by its standing force when it is configured to turn around without being fixed to the side edge of the main body 1 and to freely project to the use side. Since the side edge of the main body 1 is rolled around and freely projected (upright) to the use side while deforming the side of the part 1, it is suitable for exerting the working effect of the present invention.

  On the other hand, as shown in FIG. 8, the main body 1 has an easily breakable portion 40C adjacent to the three-fold line portion F2 connecting the constricted portions 23A and 23A as shown in the lower part of FIG. As shown in the lower part of FIG. 8 to be formed, a linear fragile part 40A extending outward from the lateral center in contact with the three-fold line part F2 is formed, or as shown in the upper part of FIG. A linear frangible portion 40 can be formed which extends beyond the line portion F1 and laterally outward from the center.

  When the easily foldable portions 40 to 40D illustrated in FIG. 8 to FIG. 11 are formed, when the three fold line portion F1 or F2 is folded, the three fold line portion is one side of the bottom side between the two easily foldable portions When the pad type absorbent article is developed back and forth from the three-folded state, both the frangible portions come to support the three-fold line portion F1 as shown in FIG. The folding back at the three-fold line portion F1 is reduced, and as a result, it is desirable for securing a good rising of the solid gather 24.

  As shown in the illustrated example, it is preferable to form an inverted V shape with the easy-to-bend part extending from the lateral center to one side and the easy-to-break part extending from the lateral center to the other side.

  It is desirable that the easily bendable portions 40 to 40D form an inverted V-shape as viewed from the center in the front-rear direction and at the end edge side. On the other hand, even if forming an inverted V shape by looking at the center side in the front-rear direction from the end edge side, there is an effect of reducing the folding back at the three-folded line portion, it is difficult to secure desired deformation of the main body.

  Examples of the easy-to-bend portion include a mode in which an emboss that squeezes together with the liquid-permeable sheet 22 is applied to the absorber 24 or the absorber 24 or a mode example in which a slit is formed in the absorber 24.

  Moreover, as shown as the easily foldable part 40C of FIG. 9, it may not be a continuous line but an intermittent line. Furthermore, as in the case of the easily foldable portions 40B and 40C of FIG. As shown in FIG. 10, a form such as a Y shape may be used.

  The present invention is applicable to sanitary napkins as well as pad-type disposable diapers such as urine absorbent pads, as long as the pad-type absorbent article is used.

  Hereinafter, an embodiment of the sanitary napkin of the present invention will be outlined with reference to the drawings in FIG.

12 to 15 show an example of a sanitary napkin. About the material which can be made into the same material example as a disposable diaper, the 100 series was displayed on the head as a code | symbol.

This sanitary napkin N is a liquid-impervious back sheet 121 made of polyethylene sheet or the like, a liquid-permeable top sheet 122 which forms a skin contact surface, and which rapidly transmits menstrual blood and vaginal discharge, and both of them. An absorbent body 123 made of cotton-like pulp, synthetic pulp, synthetic fibers or the like interposed between sheets 121 and 122, and a side edge of the absorbent body 123 as a standing base end, and at least an outlet port. It is mainly composed of a pair of left and right solid gathers 124 and 124 provided to protrude to the surface side in a predetermined section in a longitudinal direction (longitudinal direction, the same applies hereinafter).

  At the upper and lower ends of the periphery of the absorber 123, the outer edges of the back sheet 121 and the liquid-permeable top sheet 122 are joined by an adhesive such as a hot melt or a bonding means such as heat sealing. In the section, the back sheet 121 extending laterally beyond the absorber 123 and the gather sheet 124s made of non-woven fabric or the like forming the three-dimensional gather 124 are joined by an adhesive such as hot melt or adhesive means such as heat seal. The wing-like flaps W projecting laterally are formed by the laminated sheet portion of the back sheet 121 and the gather sheet 124s, and the second wing-like flaps WB are formed in the part located on the heel side from this. ing.

  As the back sheet 121, a sheet material having at least a water barrier such as polyethylene is used, but in recent years, a material having moisture permeability tends to be used from the viewpoint of prevention of stuffing. As this water-impervious and moisture-permeable sheet material, a microporous obtained by melt-kneading an inorganic filler in an olefin resin such as polyethylene or polypropylene to form a sheet, and stretching in a uniaxial or biaxial direction A sheet is preferably used. One or more adhesive layers (not shown) are formed on the non-use side (outer surface) of the back sheet 121, and the sanitary napkin N is fixed to the undergarment when worn on the body. As the back sheet 121, a polylaminated non-woven fabric in which a plastic film and non-woven fabric are laminated may be used. The back sheet 121 does not necessarily have to be liquid-impervious, and when the back sheet 121 is formed from a sheet that is not liquid-impervious, a liquid-impervious sheet is further laminated on the back surface of the back sheet 121 It can also be done. In addition, a pressure-sensitive adhesive layer (hatched portion) extending in the front and back direction is provided on the back surface of the back sheet 121 so as to be attached to the shorts when the sanitary napkin N is attached.

  The liquid-permeable top sheet 122 forms a skin contact surface which is a portion covering the surface side of the absorber 123 as shown in FIG. 12 and the like, and is a nonwoven fabric made of synthetic fibers or a nonwoven fabric made of natural fibers. And mesh sheets.

  The non-woven fabric may be produced by any process. Examples of the processing method include known methods such as spun lace method, spun bond method, thermal bond method, melt blown method, needle punch method, air through method, point bond method and the like. Among them, spunlaced non-woven fabrics are particularly preferable because they have advantages such as no adhesive and flexibility.

  Also, for example, the non-woven fabric may be a vegetable such as cotton or linen, and the non-woven fabric may consist of a single natural fiber or a mixture with a synthetic fiber.

  Furthermore, when using a mesh sheet as the liquid-permeable top sheet 122, a non-porous or non-porous non-woven fabric, a porous plastic sheet, or the like is suitably used. The material fibers constituting the non-woven fabric may be synthetic fibers of olefins such as polyethylene or polypropylene, polyesters, polyamides, etc., regenerated fibers such as rayon or cupra, or natural fibers such as cotton.

  As a processing method of the nonwoven fabric which constitutes this mesh sheet, the publicly known processing method mentioned above can be illustrated. Among these processing methods, the spunlace method is excellent in flexibility and drapability, and the thermal bonding method is excellent in bulk and softness. When a large number of through holes are formed in the liquid-permeable top sheet 122, menstrual blood, vaginal discharge, and the like are rapidly absorbed, and the dry touch property is excellent.

  As the absorber 123, any material capable of absorbing and retaining body fluid may be used, and in general, a mixture of water-absorbing polymer powder in fluff pulp is preferably used in terms of absorption function and cost. In addition, as the synthetic fiber constituting the absorbent body 123, for example, a polyolefin based such as polyethylene or polypropylene, a polyester based such as polyethylene terephthalate or polybutylene terephthalate, a polyamide based such as nylon, and copolymers thereof are used. Or a mixture of these two. In addition, composite fibers such as core-sheath fibers, side-by-side fibers, and split-type fibers, in which fibers having a high melting point are cored and fibers having a low melting point are sheathed, can also be used. In the case of a hydrophobic fiber, it is desirable to use the synthetic fiber mixed in the absorber in the case of a hydrophobic fiber that has been surface-treated with a hydrophilizing agent. The absorbent body 123 is preferably surrounded by a packaging sheet 5 such as crepe paper or non-woven fabric for holding the shape and polymer powder.

  As shown in FIGS. 1 and 2, it is preferable to interpose an intermediate sheet 126 between the liquid-permeable top sheet 122 and the absorber 123. The intermediate sheet 126 also has an effect of preventing reversion from the absorber 123 and of softening the touch when worn by a cushion-like effect. The material of the intermediate sheet 126 may be any one having liquid permeability, but one having hydrophilicity is particularly preferable. By combining such a hydrophilic intermediate sheet 126 with the liquid-permeable top sheet 122, the liquid permeability and the anti-backout property of the liquid-permeable top sheet 122 are significantly improved. As such a hydrophilic material, a material having hydrophilicity in the material itself by using regenerated fiber such as rayon or cupra, or natural fiber such as cotton is used, or olefin based such as polyethylene or polypropylene, polyester based, polyamide Fibers obtained by surface treatment of synthetic fibers such as system, etc. or composite fibers thereof, copolymers and blends thereof with a hydrophilizing agent to impart hydrophilicity can be used. As the fibers constituting the non-woven fabric, either long fibers, short fibers or a mixture of these can be used. Although any non-woven fabric of known forms such as air through, air laid, spunbond, etc. can be used as the intermediate sheet 126, the use of air through which does not reduce air permeability is preferable. Moreover, use of a durable hydrophilic non-woven fabric is more preferable. The intermediate sheet 126 is disposed in contact with the back surface of the liquid-permeable top sheet 122, and is preferably joined to the back surface of the liquid-permeable top sheet 122 by hot melt or heat fusion (emboss).

In the illustrated example, the liquid-permeable top sheet 122 is slightly wider than the width of the absorber 123, and only covers the absorber 123, and the lateral outside of the liquid-permeable top sheet 122 is liquid-permeable. It is covered by a gather sheet 124s (a member different from the top sheet) extending from both side surfaces of the top sheet 122. A laterally central portion of the gather sheet 124 s forms a solid gather 124. As the gather sheet 124s, a non-woven material subjected to appropriate water repellent treatment or hydrophilic treatment can be used according to the purpose such as preventing penetration of menstrual blood and food, or enhancing touch feeling. . As the gather sheet 124s, natural fibers, synthetic fibers, regenerated fibers, etc. can be used as materials, and those formed by an appropriate processing method can be used. Preferably, however, the feeling of goby is eliminated and the stuffiness is prevented. In order to achieve this, it is preferable to use a non-woven fabric that is breathable with a reduced basis weight. Specifically, it is preferable to use a non-woven fabric manufactured at a basis weight of 13 to 23 g / m ² , and coated with a silicone-based or paraffin-based water repellent agent or the like in order to reliably prevent permeation of body fluid. The water repellent treated nonwoven fabric is preferably used.

  As shown in FIGS. 13 and 14, the gather sheet 124s extends from the inside to the outside of the side edge of the absorber 123 and adheres to the outer edge of the back sheet 121 with an adhesive such as hot melt. The laminated sheet portion of the gather sheet 124 s and the back sheet 121 forms a pair of left and right wing flaps W at the absorber side position substantially corresponding to the body fluid discharge portion.

  The outer surface side of the wing-shaped flap W is provided with a pressure-sensitive adhesive layer (reference numeral omitted) as a means for fixing the gap, and when attached to the shorts, the wing-shaped flap W is folded back to the opposite side at the folding line position The layer is not folded back and is adhered to the inner surface of the hip portion of the shorts by the adhesive layer. Also, on the back surface of the main body portion, which is a portion between the flaps W and WB, a plurality of adhesive layers along the front-rear direction are provided as a means for securing and fixing the inner surface of the shorts.

  The pressure-sensitive adhesive layer is releasably covered by a release sheet (not shown). As the release sheet, paper whose release surface is subjected to release treatment on the pressure-sensitive adhesive layer, a polyolefin-based film such as polypropylene or polyethylene, a film such as polyester or polyvinyl alcohol, non-woven fabric, or polylaminated non-woven fabric is used. The release treatment can be formed by applying a release treatment liquid such as a silicone resin, a fluorine resin, or a tetrafluoroethylene resin. In addition, as long as the film or the nonwoven fabric is easily peeled off and does not substantially reduce the adhesive force, it may be used as it is without release treatment. The release sheet for the pressure-sensitive adhesive layer of the flap and the release sheet 31 for the pressure-sensitive adhesive layer of the main body are separately formed, and both are overlapped in a cross shape and joined by a bonding means such as an adhesive.

  On the other hand, the transversely inner portion of the gather sheet 124s is folded back so as to form a substantially cylindrical shape, and the inner edge thereof is joined on the side of the top sheet 122 by a hot melt adhesive or the like. That is, the laterally outer portion and the inner edge portion of the gather sheet 124s form a root portion fixed to both sides of the surface, and the cylindrically folded portion forms an extension portion extending from the root portion. ing. Further, of the front and rear direction both ends of the extended portion of the gather sheet 124s and the front and rear direction intermediate portion between them, both front and rear direction both end portions are inclined laterally outward as shown in FIG. Is fixed as a non-standing portion, a middle portion in the front-rear direction is a non-fixed cylindrical rising portion, and a gather elastic elastic member 124g made of thread rubber or the like extends in the front-rear direction in the cylindrical rising portion. In the state, a plurality of (two in the illustrated example) fixed in the lateral direction at intervals are formed, and solid gathers 124, 124 are formed to stand on the front side.

As shown in FIG. 12, also in the sanitary napkin, the body portion is formed with a constricted portion 123A which is narrowed on the center side in the lateral direction from the body side edge at the three-folded position.
The advantage of the formation of the constricted portion 123A is the same as that of the disposable diaper.
Moreover, the easily bendable part formed in the case of a disposable diaper can be naturally formed also in a sanitary napkin.

  B: back side portion, C: crotch portion, EF: end flap portion, F: ventral side portion, 1: main body portion 21, 121: liquid impermeable sheet, 22, 122: liquid permeable sheet, 23, 123 ... Absorbent body, 23A, 123A ... neck portion, 24, 124 ... solid gather, 24A ... root portion, 24F ... free portion, 24C ... fixed portion, 24g, 124g ... gather elastic member, 24s, 124s ... gather sheet.

Claims (6)

Longitudinally folded in three and packaged in a packaging package;
A body portion provided with an absorbent body for receiving body fluid from the use side and absorbing the body fluid, and solid gathers extending along the longitudinal direction on both lateral sides of the body portion;
The solid gather includes a root portion fixed to the side portion of the main body portion, a free portion freely projecting to the use side, and a fixed portion fixed to the main body portion on the front and rear end side of the free portion. And have
At the three-folded position of the main body portion, a constricted portion is formed which is narrowed on the center side in the lateral direction from the side edge of the main body portion;
Wherein at least a portion of the free portion covers at least a portion of the constricted portion in the lateral direction,
The constituent sheet of the solid gather is an element constituting the root portion and the free portion, and the root portion is fixed to the front side of the main body,
In at least the constricted portion of the free portion, the free portion is configured not to be fixed to the side edge of the main body portion, and to be freely protruded to the use side.
Pad type absorbent article characterized by the above-mentioned.   The pad-type absorbent article according to claim 1, wherein the free portion comprises a gather elastic member fixed in a state of being stretched in the front-rear direction with respect to the constituent sheet.    The pad type absorbent article according to claim 1, wherein the gather elastic member is positioned on the center side of the side edge of the absorber in a state in which the article is elongated in the front-rear direction against the contraction force of the gather elastic member.   The main body portion is formed with a line-like frangible portion extending outward from the center in the lateral direction adjacent to, in contact with, or beyond the three-fold line portion connecting the constricted portions. The pad type absorbent article according to 1).   The pad type absorbent article according to claim 1, wherein an easily V-shaped portion is formed by the easily broken portion extending from the center in the lateral direction to one side and the easily bent portion extending from the center in the lateral direction to the other side. The pad type absorbent article according to claim 5 , wherein the easily bendable portion forms the reverse V-shape when viewed from the center in the front-rear direction from the edge side.

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