JP6351792B2 - Absorbent articles - Google Patents

Description

  The present invention is an absorbent article such as a sanitary napkin, a panty liner, an incontinence pad for absorbing menstrual blood, vaginal discharge, urine, etc., and has a hollow cross-sectional shape that stands on the skin side on both sides of the surface side The present invention relates to an absorbent article having a hollow gather.

  Conventionally, as an absorbent article such as a panty liner, sanitary napkin, incontinence pad, a liquid-impervious back sheet such as a polyethylene sheet or a polyethylene sheet-laminated nonwoven fabric, and a liquid-permeable surface sheet such as a nonwoven fabric or a liquid-permeable plastic sheet There is known an intervening absorber made of cotton-like pulp or the like.

  Many improvements have been made to this type of absorbent article to effectively prevent lateral leakage of body fluids such as urine, menstrual blood, and vaginal discharge. Various types have been proposed in which hollow gathers having a hollow cross-sectional shape having advantages such as excellent cushioning properties and good wearing feeling have been proposed.

  For example, in the following Patent Document 1, a pair of gathers configured to have a hollow portion by a sheet-like member is provided, and each of the pair of gathers has the sheet-like member that is a skin contact surface of the absorbent article. The solid shape portion has a convex shape on the side, and the solid shape portion is bonded to the front surface layer and / or the back surface layer by a bonding portion formed so as to extend in the longitudinal direction of the absorbent article. An absorbent article formed so as to constitute the hollow portion is disclosed.

  Moreover, in the following patent document 2, a hollow loop-shaped leak-proof wall formed by joining a stretchable sheet to the both sides in the longitudinal direction of the absorbent main body is provided, and the stretchable sheet is made of an absorbent article. An absorptive article fixed by a predetermined fixed part in the excretion part field which is a field which has a wing part in the longitudinal direction is indicated.

  Furthermore, in Patent Document 3 below, at least in the crotch region including the body fluid discharge site, a loop-shaped solid gather having a hollow cross section, and a free end-shaped solid having a distal end as a free end with the outer side in the width direction as a standing base end An absorbent article having a three-dimensional gather made of gathers is disclosed.

JP 2009-6065 A JP 2010-42059 A JP 2012-205638 A

  However, in hollow gathers having a hollow cross-sectional shape such as the absorbent articles described in Patent Documents 1 and 2, the surface (skin side surface) of the hollow cross-section is formed in a smooth curved shape (loop shape), and the structure is high. Since it is difficult to increase the height, it is unsuitable for use as a three-dimensional gather for a light incontinence pad that needs to block a large amount of body fluid (urine).

  The absorbent article described in Patent Document 3 is provided with a three-dimensional gather composed of a loop-shaped three-dimensional gather having a hollow cross section and a free end-shaped three-dimensional gather having a free end. Since the three-dimensional gather extends above the loop-shaped three-dimensional gather with the width-wise outer side of the loop-shaped three-dimensional gather as an upright base end and extends above the loop-shaped three-dimensional gather, the free end-shaped three-dimensional gather easily falls down due to the pressure at the time of wearing, There was a risk of fluid leaking beyond the free end-shaped gather.

  Then, the main subject of this invention is providing the absorbent article provided with the three-dimensional gather which has high standing height and can prevent a leak, without impairing the mounting | wearing feeling of a hollow gather.

In order to solve the above-mentioned problem, as the present invention according to claim 1, a three-dimensional gather is provided with an absorbent body between the liquid-permeable top sheet and the back sheet, and stands on the skin side at both sides on the surface side. In an absorbent article comprising
The three-dimensional gather has a hollow portion formed in a substantially square hollow cross-sectional shape including a skin side surface and side surfaces extending from both side ends thereof, and an upright portion having a skin side surface of the hollow portion as a standing base end, On the skin side surface of the hollow portion, a side elastic member disposed on both sides thereof and an intermediate elastic member disposed between the side elastic members,
The upright portion stands on the skin side with the arrangement position of the intermediate elastic member as an upright base end,
The three-dimensional gather is in a folded state, and the side surfaces of the hollow portions are folded only outward in the height direction intermediate portion, and the folded portion on the outer side in the width direction among these folded portions is outside the side edge of the back sheet. An absorbent article is provided that is extended and disposed in a state in which the folded portion on the inner side in the width direction is not adhered to the absorbent body side.

  In the first aspect of the present invention, the three-dimensional gather includes a hollow section having a hollow cross-sectional shape, and an upright portion having the skin side surface of the hollow portion as an upright base end, and both sides of the hollow side skin surface. It has a side elastic member arranged in the part and an intermediate elastic member arranged between the side elastic members. That is, the skin side surface of the width direction section in which the side elastic member and the intermediate elastic member are arranged rises to the skin side of the wearer, and a hollow section having a hollow cross-sectional shape is formed. An upright portion that stands on the skin side is formed with the upright base end. For this reason, it is possible to increase the standing height of the three-dimensional gather without impairing the wearing feeling due to the cushioning property of the hollow portion, and it is difficult to form a gap between the skin and the body fluid can be surely prevented from leaking. .

  Moreover, the said standing part has stood up to the skin side by making the arrangement position of the said intermediate | middle part elastic member into the standing base end. If the intermediate elastic member is not provided at the standing base end of the standing part, the side part in the width direction of the skin side surface of the hollow part is deformed upward by the tensile force upward of the standing part. In order to cause deformation such that the elastic members are attracted to each other, the side surface on the inner side in the width direction among the side surfaces of the hollow portion does not stand up vertically with respect to the surface of the absorbent article, so that it rises inclined toward the outside. Become. For this reason, the damming effect of the bodily fluid that has flowed from the center side of the absorbent article is reduced, and it is easy to leak outside the three-dimensional gather. On the other hand, in the three-dimensional gather according to the present invention, since the intermediate elastic member is arranged at the standing base end of the standing part, the upward tensile force acts on the skin side surface of the hollow part by the rising of the standing part. However, the intermediate elastic member acts so as to cancel out the tensile force, and the side elastic members do not deform so as to be pulled together, and it becomes easy to stand up in the arrangement position as it is, and the absorbent article in the hollow portion As a result that the side surface, which is a standing surface from the surface, easily stands up perpendicularly to the surface of the absorbent article, it is possible to effectively dam body fluid, and to reliably prevent leakage of body fluid.

In the first aspect of the present invention, in the case where the hollow portion is formed in a substantially rectangular hollow cross-sectional shape including the skin side surface and side surfaces extending from both side ends thereof, the three-dimensional gather is a piece before opening. In a folded state such as a mounted state, the side surfaces of the hollow portions are folded only outward at the intermediate portion in the height direction, and the folded portions on the outer side in the width direction among these folded portions extend outward from the side edges of the back sheet. Since the folding portion on the inner side in the width direction is arranged in a state where it is not bonded to the absorber side, folding of both side surfaces of the hollow portion is minimized in the folded state. In the standing state, both side surfaces are likely to rise to the skin side, and the side surface on the outer side in the width direction rises to the skin side with the side edge of the back sheet as the standing base end.

As a second aspect of the present invention, the skin side surface of the hollow portion is configured by the sheet being folded twice and the side elastic member and the intermediate elastic member being disposed inside the double sheet. ,
The absorbent article according to claim 1, wherein one side elastic member of the side elastic members is disposed at or near the folded portion of the double sheet.

  In the invention according to the second aspect, as the skin side surface of the hollow portion, the sheet is folded back twice, and the side elastic member and the intermediate elastic member are disposed inside the double sheet. By this, the rigidity of the skin side surface of the hollow portion is increased, and this skin side surface is easily raised from the surface of the absorbent article.

According to a third aspect of the present invention, the standing portion is formed by a one-stage gather formed substantially linearly from the standing base end to the tip or a multi-stage gather that is refracted into one or more at the standing intermediate portion. The absorbent article in any one of 1-2 is provided.

The invention according to claim 3 stipulates that the gather structure of the upright portion may be a linear one-stage gather or a multi-stage gather such as a square shape, a Z shape, or a Σ shape.

As this invention which concerns on Claim 4 , the said hollow part is formed in the substantially square hollow cross-sectional shape containing the said skin side surface and the side surface extended from the both ends.
The absorbent article according to any one of claims 1 to 3, wherein the skin side surface and at least one side surface of the hollow portion have a double sheet structure in which sheets are laminated in a double layer. Is provided.

In the invention of claim 4 , the hollow portion is formed in a substantially square hollow cross-sectional shape including a skin side surface and side surfaces extending from both side ends thereof, and a sheet is provided on the skin side surface and at least one side surface of the hollow portion. By adopting a double sheet structure in which the layers are double stacked, the standing property of the hollow portion is improved.

As the present invention according to claim 5, wherein the hollow portion and the upright portion is either formed by one sheet, according to claim which is formed by joining those formed of a sheet of separate respectively 1-4 An absorbent article according to any of the above is provided.

In the invention of claim 5, the method for forming the hollow portion and the upright portion is defined, and one sheet may be formed by folding, or the hollow portion and the upright portion may be made of different materials. It may be formed.

  As described above in detail, according to the present invention, it is possible to provide an absorbent article including a three-dimensional gather that has a high standing height and can prevent leakage without impairing the wearing feeling of the hollow gather.

It is a partially broken development view of the light incontinence pad 1 according to the present invention. It is the II-II arrow directional view. It is the III-III arrow directional view of FIG. 3A shows a standing state of a three-dimensional gather, (A) is a three-dimensional gather G according to the present invention, and (B) is a cross-sectional view of a conventional three-dimensional gather. It is a top view which shows the adhesion | attachment area | region 20 of the three-dimensional gather G. FIG. It is sectional drawing of the folding state of the solid gather G. FIG. It is sectional drawing of the three-dimensional gather G which concerns on another form (the 1). It is sectional drawing of the solid gather G (the 2) which concerns on another form. (A)-(D) are sectional drawings of solid gather G (the 3) concerning other forms. It is sectional drawing which shows the folding procedure in the case of 1 step | paragraph gathers. It is sectional drawing which shows the folding procedure in the case of a two-stage gather. It is sectional drawing of the light incontinence pad 1 which concerns on another form.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

[Basic configuration of light incontinence pad 1]
As shown in FIGS. 1 to 3, the light incontinence pad 1 according to the present invention is provided between a liquid-impermeable back sheet 2 and a liquid-permeable surface sheet 3 (hereinafter also simply referred to as a surface sheet). The absorbent body 4 or the absorbent body 4 surrounded by crepe paper (not shown) is interposed, and the three-dimensional gathers G and G that stand on the skin side are provided on both sides of the surface side.

  The liquid-impervious back sheet 2 is made of a sheet material having at least water-impervious properties such as polyethylene and polypropylene, but in addition to this, a non-woven sheet after securing a substantially liquid-impervious property through a waterproof film. (In this case, a liquid-impervious back sheet is composed of the waterproof film and the nonwoven fabric). In recent years, those having moisture permeability tend to be suitably used from the viewpoint of preventing stuffiness. The water- and moisture-permeable sheet material is a microporous material obtained by melting and kneading an inorganic filler in an olefin-based resin such as polyethylene or polypropylene to form a sheet, and then stretching in a uniaxial or biaxial direction. A sheet is preferably used.

  Next, as the liquid-permeable surface sheet 3, a porous or non-porous nonwoven fabric or a porous plastic sheet is preferably used. Examples of the material fibers constituting the nonwoven fabric include synthetic fibers such as polyethylene or polypropylene, synthetic fibers such as polyester and polyamide, recycled fibers such as rayon and cupra, and natural fibers such as cotton. A nonwoven fabric obtained by an appropriate processing method such as a lace method, a spun bond method, a thermal bond method, a melt blown method, or a needle punch method can be used. Among these processing methods, the spunlace method is excellent in terms of flexibility and drapeability, and the thermal bond method is excellent in terms of being bulky and soft.

  The absorbent body 4 interposed between the liquid-impervious back sheet 2 and the liquid-permeable top sheet 3 is made of, for example, fluffy pulp and a water-absorbing polymer. The water-absorbing polymer is mixed in the pulp constituting the absorber, for example, as granular powder. Examples of the pulp include chemical fibers obtained from wood, cellulose fibers such as dissolved pulp, and artificial cellulose fibers such as rayon and acetate. Softwood pulp having a longer fiber length than hardwood pulp functions and It is preferably used in terms of price.

  The absorbent body 4 may be mixed with synthetic fibers. As the synthetic fiber, for example, polyolefins such as polyethylene or polypropylene, polyesters such as polyethylene terephthalate and polybutylene terephthalate, polyamides such as nylon, and copolymers thereof can be used. It may be a mixture. In addition, a composite fiber such as a core-sheath fiber, a side-by-side fiber, or a split fiber having a fiber having a high melting point as a core and a fiber having a low melting point as a sheath can also be used. In the case of a hydrophobic fiber, it is desirable to use a synthetic fiber that has been surface-treated with a hydrophilizing agent so as to have an affinity for body fluids.

  Examples of the superabsorbent resin include cross-linked polyacrylate, self-crosslinked polyacrylate, saponified acrylate-vinyl acetate copolymer cross-linked, isobutylene / maleic anhydride copolymer cross-linked, Examples include cross-linked polysulfonates, and partially cross-linked water-swellable polymers such as polyethylene oxide and polyacrylamide. Among these, those based on acrylic acid or acrylate that are excellent in water absorption and water absorption speed are preferred. In the production process of the highly water-absorbent resin having the water absorption performance, the water absorption force and the water absorption speed can be adjusted by adjusting the crosslinking density and the crosslinking density gradient.

  Gather forming nonwoven fabrics 7 and 7 are provided on both sides of the light incontinence pad 1 along the longitudinal direction and over the entire length of the light incontinence pad 1, and the gather forming nonwoven fabric 7, 7 is extended laterally, and the liquid-impervious back sheet 2 is extended laterally, and the gathered nonwoven fabric 7 part and the liquid-impervious back are extended laterally. Side flaps are formed by joining the sheet 2 portion with a hot melt adhesive or the like.

As the gather forming nonwoven fabric 7, a water repellent nonwoven fabric or a hydrophilic treated nonwoven fabric can be used from the viewpoint of important functions. For example, if importance is placed on functions such as preventing the penetration of urine, urine, etc., or enhancing the feeling of touch, SSMS and SMS coated with a silicon-based, paraffin-based, alkylchromic chloride-based water repellent, etc. It is desirable to use a water-repellent treated nonwoven fabric such as SMMS, and if importance is attached to the absorbability of body fluids, a method of polymerizing a compound having a hydrophilic group, such as an oxidation product of polyethylene glycol, in the process of manufacturing synthetic fibers Or by treating the surface with a metal salt such as stannic chloride, partially dissolving the surface to make it porous, and depositing metal hydroxides to make the synthetic fibers swell or porous, applying capillary action to make them hydrophilic It is desirable to use a hydrophilic treated non-woven fabric imparted with properties. As the gather forming nonwoven fabric 7, natural fibers, synthetic fibers, regenerated fibers, or the like, which are formed by an appropriate processing method, can be used. Preferably, the fabric weight is reduced while suppressing the basis weight. It is preferable to use a non-woven fabric. As a specific basis weight, 5 to 25 g / m ² is preferable, and 10 to 20 g / m ² is more preferable.

  The gather forming nonwoven fabric 7 is appropriately folded to form a three-dimensional gather G. As shown in FIG. 2, the three-dimensional gather G has a predetermined adhesive region 20 on both sides of the main body portion where the absorbent body 4 is interposed between the liquid-permeable top sheet 3 and the liquid-impervious back sheet 2. The hollow portion 10 having a hollow cross-sectional shape and the standing portion 11 having the skin side surface 12 of the hollow portion 10 as a standing base end, and the skin side surface 12 of the hollow portion 10 on both sides thereof Side elastic members 15 and 15 having appropriate positions in both ends or in the longitudinal direction, respectively, and intermediate elastic members 16 in which appropriate positions in both ends or in the longitudinal direction are fixed between the side elastic members 15 and 15. The three elastic members 15, 15, 16 made of are spaced apart in the width direction and arranged along the longitudinal direction.

  The hollow portion 10 is substantially defined in four directions by a skin side surface 12 standing on the skin side, side surfaces 13 and 13 extending from both side ends to the surface of the main body portion, and a bottom surface 14 joined to the main body portion. It has a quadrangular hollow cross-sectional shape.

  The standing part 11 stands on the skin side with the arrangement position of the intermediate elastic member 16 as a standing base end. In the example shown in FIG. 2, the upright portion 11 is a one-stage gather that extends substantially linearly from the upright base end toward the oblique skin side outside in the width direction, and has both ends or a longitudinal direction in the vicinity of the free end thereof. An elastic member 17 having an appropriate position fixed is provided.

  That is, in this three-dimensional gather G, the skin side surface 12 of the width direction section in which the said side part elastic members 15 and 15 and the intermediate | middle part elastic member 16 are arrange | positioned stood up to a wearer's skin side, and the hollow part 10 of a hollow cross-section shape. Is formed, and an upright portion 11 is formed to stand further on the skin side with the skin side surface 12 of the hollow portion 10 as an upright base end. For this reason, it is possible to increase the standing height of the three-dimensional gather G by providing the standing portion 11 without impairing the wearing feeling due to the cushioning property of the hollow portion 10, and it is difficult to form a gap between the skin and the skin. Body fluid leakage can be reliably prevented.

  Further, the standing part 11 stands on the skin side with the position of the intermediate elastic member 16 arranged on the skin side surface 12 of the hollow part 10 as the standing base end. Here, if the intermediate elastic member 16 is not provided at the upright base end of the upright portion 11, as shown in FIG. 4B, the skin side surface of the hollow portion is pulled by the tensile force rising above the upright portion. Although the intermediate portion in the width direction is deformed upward, accompanying this, deformation occurs such that the side elastic members on both sides are attracted to each other. For this reason, among the side surfaces of the hollow portion, particularly when the upright portion is inclined and tilted toward the outer skin as in the case of the present three-dimensional gather, the inner side surface in the width direction is perpendicular to the surface of the light incontinence pad. As a result, the body fluid flowing from the center side to the side of the light incontinence pad has a reduced damming effect and easily leaks outside the three-dimensional gather. Become. On the other hand, in the three-dimensional gather G according to the present invention, as described above, since the intermediate elastic member 16 is disposed at the upright base end of the upright portion 11, as shown in FIG. Even if an upward tensile force acts on the skin side surface of the hollow portion 10 due to the rising of the standing portion 11, the intermediate elastic member 16 acts so as to cancel the tensile force, and the side elastic members 15, 15 are attracted to each other. The side surfaces 13 and 13, which are standing surfaces from the pad surface of the hollow portion 10, easily stand up perpendicularly to the pad surface without causing such deformation. Therefore, the body fluid can be effectively dammed and the body fluid can be surely prevented from leaking.

  The structure of the three-dimensional gather G will be described in more detail. The skin side surface 12 of the hollow portion 10 folds the gather-forming nonwoven fabric 7 twice, and the side elastic members 15, 15 and It is preferable that the intermediate elastic member 16 is disposed. By forming the skin side surface 12 of the hollow part 10 with a double sheet, the rigidity of the skin side surface 12 is increased, and the skin side surface 12 is prevented from being deformed and rises to the skin side. As a result, the side surface 13 rises substantially vertically from the surface of the light incontinence pad 1.

  Of the side elastic members 15, 15 arranged on both sides of the skin side surface 12, the side elastic member 15 on one side, in the illustrated example, the side elastic member 15 on the inner side in the width direction is a double side of the skin side surface 12. It is preferable to arrange at the folded end of the sheet or in the vicinity thereof. Thereby, the part which made it the double sheet | seat and improved rigidity becomes easy to act as the skin side surface 12. FIG. Note that the side elastic member 15 on the other side, in the illustrated example, the side elastic member 15 on the outer side in the width direction is preferably disposed slightly inside the end edge of the double sheet as in the illustrated example.

  On the other hand, the said side surfaces 13 and 13 and the bottom face 14 are formed with the single sheet | seat of the nonwoven fabric 7 for gather formation in the example shown by FIG. Thereby, since especially the side surfaces 13 and 13 come to have a softness | flexibility, the cushioning property of the hollow part 10 becomes favorable, and the solid gather G which is excellent in a feeling of mounting | wearing comes to be obtained.

  As shown in FIG. 2, the upright portion 11 includes a double-sided gather forming nonwoven fabric 7 extending from the side surface 13 on one side of the hollow portion 10, in the illustrated example, from the side surface 13 on the inner side in the width direction. At the same time, the elastic member 17 is disposed at the distal end portion inside the double sheet, and the base end portion of the portion extended to the skin side is the end on the inner side in the width direction with respect to the upper surface (skin side surface) of the skin side surface 12. A portion extending outward from the adhesive portion 21 functions as an upright portion 11 standing on the skin side by using the adhesive portion 21 bonded by an adhesive from the edge to the arrangement position of the intermediate elastic member 16. doing.

  As shown in FIG. 3, the gather forming nonwoven fabric 7, as shown in FIG. 3, the side surfaces 13 and 13 of the hollow portion 10 are folded outward at the center in the height direction and laminated in the laminated state. Bonded to the side.

  As shown in FIG. 5, the adhesive region 20 between the gather-forming nonwoven fabric 7 and the main body portion is relatively spaced from the side edge of the liquid-impermeable back sheet 2 in the standing range where the three-dimensional gather G is formed. In the non-stand-up range in which a narrow bonding region is formed and the gather forming nonwoven fabric 7 is folded and bonded to the absorbent body 4 side in the laminated state, the side face 13 on the inner side in the width direction is folded as described above to the absorbent body 4 side. A relatively wide adhesion region is formed from the side edge of the liquid-impermeable back sheet 2 by the amount adhered to the liquid-impervious back sheet 2. That is, by providing a non-adhesive region where no adhesive is applied on the inner side in the width direction of the bonding region 20 in the standing range, the side surface 13 on the inner side in the width direction of the hollow portion 10 can be raised by the contraction force of the elastic members 15 to 17. It has become.

  In the folded state such as when the light incontinence pad 1 is individually mounted, the three-dimensional gather G has side surfaces 13 and 13 of the hollow portion 10 at only one place in the middle in the height direction, as shown in FIG. Folded outwardly, among these folded parts, a folded part 13a on the outer side in the width direction is arranged to extend outward from the side edge of the liquid-impervious backsheet 2, and a folded part 13b on the inner side in the width direction is an absorber. It is arranged in a state where it is not bonded to the 4 side. In this way, since the folding of both side surfaces 13 and 13 of the hollow portion 10 is minimized in the folded state of the three-dimensional gather G, both side surfaces are easily raised to the skin side in the standing state of the three-dimensional gather G, The side surface 13 on the outer side in the width direction rises with the side edge of the liquid-impermeable back sheet 2 as an upright base end.

  The dimensions of each part of the three-dimensional gather G will be described in detail. In the folded state shown in FIG. 6, the gather width A is 10 to 35 mm, preferably 15 to 30 mm. The width B of the double sheet portion of the gather-forming nonwoven fabric 7 that becomes the skin side surface 12 when standing is 5 to 25 mm, preferably 10 to 20 mm. The width C of the upright part 11 is preferably 5 to 20 mm. The width D of the side surface 13 in the folded state (about half of the standing height of the side surface 13) D is 3 to 12 mm, preferably 5 to 10 mm. At this time, when the side surface 13 of the hollow portion 10 is folded, the upright portion 11 is formed with a length substantially equal to the folded end portion.

  Further, as shown in FIG. 5, the distance E from the front end of the light incontinence pad 1 to the front end of the standing range is preferably 30 to 80 mm, preferably 35 to 75 mm. The distance F to the rear end of the range is 10 to 30%, preferably 15 to 25% of the total length of the light incontinence pad 1.

  As shown in FIG. 7, the upright portion 11 may have a multistage gather structure in which the upright intermediate portion is refracted into one or more. In the case of a multi-stage gather structure, as shown in FIG. 7, an elastic member 18 is disposed at a refracting portion, and the elastic member 18 is refracted as a bending point. In the example shown in FIG. 7, it is formed by a two-stage gather having a cross-sectional shape. By using a multi-stage gather, it rises higher on the skin side, so that leakage can be further prevented.

  Moreover, in order to form the hollow cross-sectional shape of the said hollow part 10, it replaces with the structure which arrange | positions the side part elastic members 15 and 15 and the intermediate part elastic member 16 in the skin side surface 12, and as shown in FIG. An elastic sheet 19 that expands and contracts in the longitudinal direction of the light incontinence pad 1 can be disposed on the 10 skin side surfaces 12. As said elastic sheet 19, what processed the elastic film, the nonwoven fabric, the urethane foam, etc. into the sheet form can be used, for example. The stretchable direction of the stretchable sheet 19 is preferably stretchable mainly in the longitudinal direction of the light incontinence pad 1, but is preferably one that hardly stretches in the width direction.

  On the other hand, the thickness of the elastic members 15 and 16 when the side elastic member 15 and the intermediate elastic member 16 are used is preferably 300 to 1000 dt, and more preferably 400 to 550 dt. The elongation ratio of the elastic members 15 and 16 is preferably 10 to 90% (1.1 to 1.9 times), and more preferably 20 to 80% (1.2 to 1.8 times). Although the elongation rates of the elastic members 15 and 16 may be equal, it is preferable to set the elongation rate of the elastic members disposed on the inner side in the width direction of the light incontinence pad 1 to be relatively high.

  The three-dimensional gather G can be formed in various forms as shown in FIG. In FIG. 9 (A), in order to make the skin side surface 12 of the hollow portion 10 into a double sheet, the end portion folded back inward is further extended to the inside of the side surface 13 and bonded at the width direction outer end portion of the bottom surface 14. It is like that. As a result, the rigidity of the side surface 13 on the outer side in the width direction is increased, so that the outward standing property is improved.

  Further, as shown in FIG. 9B, the elastic member 22 can be disposed in the middle portion in the height direction inside the double sheet on the side surface 13 on the outer side in the width direction. Thereby, the standing property of the side surface 13 on the outer side in the width direction can be further enhanced. The elongation rate (tension) of the elastic member 22 is preferably set lower than the elongation rates of the elastic members 15 and 16 disposed on the skin side surface 12.

  Further, as shown in FIG. 9 (C), the end portion folded inward to make the skin side surface 12 and the lateral side surface 13 in the width direction into a double sheet is further extended to the middle portion of the lateral side surface 13 in the width direction. It may be extended. At this time, as shown in the illustrated example, the elastic member 23 can be disposed inside the double sheet on the side surface 13 in order to improve the standing property of the side surface 13 on the inner side in the width direction. The elongation rate of the elastic member 23 is preferably set lower than the elongation rates of the elastic members 15 and 16 disposed on the skin side surface 12. However, it is desirable to leave a single sheet portion between the extended double sheet portion and the skin side surface 12 in order to change the rigidity between the skin side surface 12 and the side surface 13. Although not shown in the drawing, an elastic member may also be disposed at the intermediate portion in the height direction of the side surface 13 on the outer side in the width direction at this time.

  On the other hand, in the three-dimensional gather G, as shown in FIG. 9D, the hollow portion 10 and the upright portion 11 are formed as separate sheets, and the upright portion 11 is formed on the skin side surface 12 of the hollow portion 10. It can also be formed by bonding. This makes it possible to use different materials for the hollow portion 10 and the standing portion 11. For example, a hydrophilic non-woven fabric is used for the hollow portion 10, while a water-repellent non-woven fabric can be used for the purpose of reducing the stickiness because the upright portion 11 has many opportunities to come into contact with the skin. .

  A folding procedure in the case where the three-dimensional gather G is formed by folding a single gather-forming nonwoven fabric 7 will be described with reference to FIGS. 10 and 11. First, the folding procedure of the one-stage gather shown in FIG. 2 will be described. As shown in FIG. 10 (A), both sides of the gather-forming nonwoven fabric 7 are folded back to the upper layer side, and the folded double The elastic members 15 to 17 are disposed on the sheet portions, respectively, and a portion that becomes the skin side surface 12 and a portion that becomes the standing portion 11 of the hollow portion 10 are formed (FIG. 10B). Next, as shown in FIG. 10 (B), after the portion that becomes the skin side surface 12 is further folded back to the upper layer side, the portion that becomes the upright portion 11 is first turned on as shown in FIG. 10 (C). Folded to the upper layer side of the part that becomes the folded skin side surface 12 and is a laminated part of the folded base end side of the part that becomes the standing part 11 and the part that becomes the skin side face 12, up to the arrangement position of the intermediate elastic member 16 The three-dimensional gather G is completed by bonding with a glue (FIG. 10D).

  Next, the folding procedure of the two-stage gather shown in FIG. 7 will be described. As shown in FIG. 11 (A), both sides of the gather-forming nonwoven fabric 7 are folded back to the upper layer side, and the folded double The elastic members 15 to 18 are respectively arranged in the sheet portion, and a portion that becomes the skin side surface 12 and a portion that becomes the standing portion 11 of the hollow portion are formed (FIG. 11B). Next, as shown in FIG. 11 (B), the portion that becomes the skin side surface 12 is further folded back to the upper layer side, and the arrangement position of the elastic member 18 of the portion that becomes the standing portion 11 or the vicinity thereof is used as a base point. The tip portion is folded back to the lower layer side (FIG. 11C). Thereafter, as shown in FIG. 11 (C), the portion to be the standing portion 11 is folded back to the upper layer side of the portion to be the skin side surface 12 which has been folded first, and the folded base end side of the portion to be the standing portion 11 The three-dimensional gather G is completed by adhering the portion between the portion to be the skin side surface 12 and the position where the intermediate elastic member 16 is disposed with an adhesive (FIG. 11D).

[Other examples]
(1) In the above embodiment, the standing part 11 is formed so as to stand obliquely outward on the skin side with the skin side surface 12 of the hollow part 10 as the standing base end, as shown in FIG. In addition, the skin side surface 12 of the hollow portion 10 may be formed to stand up obliquely inward on the skin side with the standing base end.
(2) In the above embodiment, the adhesive region 20 and the adhesive portion 21 are applied with the adhesive over almost the entire surface in the width direction of each region, but the adhesive is applied to at least both ends in the width direction. If so, the intermediate portion may be an intermittent portion to which no adhesive is applied.

  DESCRIPTION OF SYMBOLS 1 ... Light incontinence pad, 2 ... Impermeable back sheet, 3 ... Liquid permeable surface sheet (surface sheet), 4 ... Absorber, 7 ... Gathering nonwoven fabric, 10 ... Hollow part, 11 ... Standing part, 12 ... Skin side, 13 ... Side, 14 ... Bottom, 15 ... Side elastic member, 16 ... Intermediate elastic member, 17 ... 18 Elastic member, 20 ... Adhesion region, 21 ... Adhesion part, G ... Solid gather

Claims (5)

In the absorbent article provided with a three-dimensional gather that stands on the skin side on both sides of the surface side, with an absorber interposed between the liquid-permeable top sheet and the back sheet,
The three-dimensional gather has a hollow portion formed in a substantially square hollow cross-sectional shape including a skin side surface and side surfaces extending from both side ends thereof, and an upright portion having a skin side surface of the hollow portion as a standing base end, On the skin side surface of the hollow portion, a side elastic member disposed on both sides thereof and an intermediate elastic member disposed between the side elastic members,
The upright portion stands on the skin side with the arrangement position of the intermediate elastic member as an upright base end,
The three-dimensional gather is in a folded state, and the side surfaces of the hollow portions are folded only outward in the height direction intermediate portion, and the folded portion on the outer side in the width direction among these folded portions is outside the side edge of the back sheet. An absorbent article, wherein the absorbent article is extended and disposed in a state in which a folded portion on the inner side in the width direction is not bonded to the absorber side. The skin side surface of the hollow portion is configured by the sheet being folded twice and the side elastic member and the intermediate elastic member being disposed inside the double sheet,
The absorbent article according to claim 1, wherein one side elastic member of the side elastic members is disposed at or near the folded portion of the double sheet.   The absorption according to any one of claims 1 to 2, wherein the standing part is formed by a one-stage gather formed substantially linearly from a standing base end to a tip or a multi-stage gather that is refracted in one or a plurality of standing intermediate parts. Sex goods. The hollow portion is formed in a substantially rectangular hollow cross-sectional shape including the skin side surface and side surfaces extending from both side ends thereof,
The absorbent article according to any one of claims 1 to 3, wherein the skin side surface and at least one side surface of the hollow portion have a double sheet structure in which sheets are laminated in a double layer.   The absorptive article according to any one of claims 1 to 4 in which said hollow part and standing part are formed by joining what was formed by one sheet, or formed by a separate sheet, respectively.

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