JP5883681B2 - Absorbent articles - Google Patents

Description

  The present invention relates to absorbent articles such as sanitary napkins, panty liners, and incontinence pads for absorbing menstrual blood, cages, and the like, and more particularly, to an absorbent article in which a shape holding member is disposed at a folding position during individual packaging.

  Conventionally, as absorbent articles such as sanitary napkins, panty liners, cage sheets, incontinence pads, etc., it consists of a liquid-impermeable back sheet made of polyethylene sheet or polyethylene laminated nonwoven fabric, and a nonwoven fabric or porous plastic sheet. There is known one in which an absorbent body made of cotton-like pulp or the like is interposed between the liquid-permeable surface sheet.

  When individually packaging this type of absorbent article, the pressure-sensitive adhesive layer provided on the surface (outer surface) on the liquid-impervious back sheet side is covered with a release sheet made of paper or film, and the absorbent article The packaging sheet was arrange | positioned on the outer surface side, and these absorptive articles, peeling sheets, and packaging sheets were made into the trifold or the four fold in the longitudinal direction.

However, when an absorbent article that has been individually packaged is opened and unfolded, creases or creases remain along the fold line at the time of individual packaging. In order to solve this problem, as disclosed in Patent Documents 1 and 2 below, a fold line position with an emboss (squeezing groove) has been proposed.

JP 2010-115368 A JP 2010-178932 A

  However, as shown in Patent Documents 1 and 2, even if embossing is performed at the folding line position, a crease may remain, and it is difficult to obtain a sufficient effect. In addition, the above-mentioned creases and creases may cause a sense of incongruity at the time of wearing or leakage due to not being in close contact with the skin. Moreover, the embossing increases the rigidity of the embossed part and its vicinity, which may cause the skin contact to deteriorate.

  Then, the main subject of this invention is providing the absorbent article which eliminated the crease | folds and crease | folds by individual packaging, improved the wearing feeling, and prevented the leak.

In order to solve the above-mentioned problem, as the present invention according to claim 1, an absorbent body is interposed between the liquid-permeable top sheet and the back sheet, and is folded in the longitudinal direction at the folding line in the width direction when individually packaged. Absorbent articles
A flexible line that is long in the width direction of the absorbent article at the center of the absorbent article in the width direction and on and / or in the vicinity of the fold line and easily deforms when a bending load is applied. The shape-retaining member for the absorbent body made of a material that has a property and is difficult to restore by maintaining this deformed state is on the outer surface side of the back sheet or on the skin side of the back sheet and more than the absorbent body An absorbent article characterized by being disposed along the width direction of the absorbent article is provided on the outer surface side .

In the first aspect of the present invention, the absorbent article is formed at a central portion in the width direction on the fold line and / or in the vicinity thereof in the case of individual packaging and has a long line shape in the width direction of the absorbent article. The shape-retaining member for the absorber made of a material that has the flexibility to be easily deformed when it is applied and is difficult to restore by maintaining this deformed state is provided on the outer surface side of the back sheet or the back sheet. Since it is disposed on the skin side and on the outer surface side of the absorbent body, and is disposed along the width direction of the absorbent article, the absorbent article is folded in a tri-fold or quadruple-folded state when opened The shape-retaining member is curved so that the central part in the longitudinal direction of the member is raised on the surface side of the absorbent article, and the absorbent body is maintained in a curved state in which the central part in the width direction is convex on the surface side. Bend with respect to the longitudinal direction of the absorber Increasing the sex, it is to eliminate the wrinkles and creases fold by individual packaging. Accordingly, the wearing feeling of the absorbent article is improved and leakage can be prevented. The shape-retaining member is a linear member made of a material that has the flexibility to be easily deformed when a bending load is applied and is difficult to restore while maintaining this deformed state.

As this invention which concerns on Claim 2, as for the said absorbent article, a pair of right and left pressing groove is given to the surface side of the said liquid-permeable surface sheet,
A member longitudinal dimension of the shape maintaining member is formed with a length that can be arranged in a range of 30 mm or less on each side from the longitudinal center line of the absorbent article, and at least a separation width between the pair of left and right pressing grooves. The absorbent article of Claim 1 currently formed by the length of this is provided.

In the invention according to the second aspect, the case where the fold line of the individual packaging is formed in a region that abuts around the leg of the absorbent article is defined. In this case, if the end of the shape-retaining member hits the inside of the leg, it may cause discomfort and rubbing. Therefore, the length in the longitudinal direction of the member that can be disposed in a range of 30 mm or less on each side from the longitudinal center line of the absorbent article and forming in, since the usual pair of right and left compressed grooves are applied in this area, and the rigidity between the compressed groove is high, by raised between the compressed groove on the skin side is possible to improve the fit It preferred in view of the fact, to increase the deformability between compression groove, and the forming at least the right and left compressed grooves member longitudinal length of more spaced width between.

  As the present invention according to claim 3, there is provided the absorbent article according to any one of claims 1 and 2, wherein a plurality of the shape holding members are arranged at intervals in the width direction of the absorbent article.

  According to the third aspect of the present invention, the configuration of the shape-retaining member is reduced by reducing the rigidity of the shape-retaining member by providing a pattern in which a plurality of the shape-retaining members are disposed at intervals in the width direction of the absorbent article. This makes it easier to deform the article more flexibly.

  As the present invention according to claim 4, there is provided the absorbent article according to any one of claims 1 to 3, wherein a plurality of the shape holding members are arranged at intervals in the longitudinal direction of the absorbent article.

  In the invention according to the fourth aspect, as the arrangement pattern of the shape holding member, a plurality of patterns are arranged at intervals in the longitudinal direction of the absorbent article, thereby maintaining one shape in the entire arrangement range. The rigidity can be kept lower than when the member is arranged, and the absorbent article is easily deformed. Moreover, since a shape holding member can be arrange | positioned in the wide range of the longitudinal direction of an absorbent article, a fold and a crease can be reliably eliminated over a wide range.

  As the present invention according to claim 5, there is provided the absorbent article according to claim 4, wherein a member width dimension of the shape holding member is gradually increased with increasing distance from the fold line.

  In the invention according to claim 5, when a plurality of shape maintaining members are arranged at intervals in the longitudinal direction of the absorbent article, by reducing the member width dimension in the vicinity of the folding line of the individual packaging, Rigidity is kept low to make it easier to deform the absorbent article.

  As the present invention according to claim 6, there is provided the absorbent article according to any one of claims 4 and 5, wherein the interval between the shape holding members is disposed so as to gradually increase as the distance from the folding line increases. The

  In the invention described in claim 6 above, when a plurality of shape maintaining members are arranged at intervals in the longitudinal direction of the absorbent article, the crease or fold can be folded by increasing the arrangement interval in the vicinity of the folding line of the individual packaging. I try to eliminate the cocoons effectively.

As the present invention according to claim 7, solid gathers standing on the skin side are formed on both sides of the surface side of the absorbent article,
When the fold line is formed in the standing range of the three-dimensional gather, the fold line formed in the standing range of the three-dimensional gather is straddled, and the region overlapping the standing range of the three-dimensional gather is along the longitudinal direction of the absorbent article. An absorbent article according to any one of claims 1 to 6, wherein a second shape retaining member is provided.

  In the invention according to the seventh aspect, the case where a folding line of individual packaging is formed in the standing range of the three-dimensional gather is defined. If a fold line is formed in the standing range of the three-dimensional gather, the three-dimensional gather may fold up and the three-dimensional gather may not stand up sufficiently. By arranging the second shape holding member along the longitudinal direction of the absorbent article in the region overlapping with the range, the second shape holding member bent by the individual packaging at the time of wearing is arranged in a straight line or a central portion. By deforming into a curved shape raised on the skin side, the folds of the three-dimensional gather are eliminated, and the standing of the gather is ensured.

  As described above in detail, according to the present invention, it is possible to provide an absorbent article that eliminates creases and creases caused by individual packaging, enhances the wearing feeling, and prevents leakage.

It is a partial fracture development view of sanitary napkin 1 concerning the present invention. It is the II-II arrow directional view. It is a longitudinal cross-sectional view which shows the opening procedure (the 1) of the sanitary napkin 1. FIG. It is a perspective view which shows the opening procedure (the 2) of the sanitary napkin 1. FIG. FIG. 5 is a view taken along line VV in FIG. 4. 3 is a development view of the sanitary napkin 1 showing dimensions of the shape holding member 20. FIG. FIG. 6 is a development view of a sanitary napkin 1 according to another embodiment showing the dimensions of the shape holding member 20. 3 is a back view of the sanitary napkin 1 showing an arrangement pattern of the shape holding member 20. FIG. 3 is a back view of the sanitary napkin 1 showing an arrangement pattern of the shape holding member 20. FIG. 3 is a back view of the sanitary napkin 1 showing an arrangement pattern of the shape holding member 20. FIG. 3 is a back view of the sanitary napkin 1 showing an arrangement pattern of the shape holding member 20. FIG. 4 is a development view of the sanitary napkin 1 showing the second shape holding member 21. FIG. FIG. 13 is a view taken along the line XIII-XIII in FIG. 12. 3 is an enlarged view of a second shape holding member 21. FIG. FIG. 4 is a back view of the sanitary napkin 1 showing how to fix the shape holding member 20. 3 is a plan view of a shape holding member 20. FIG.

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

[Basic structure of sanitary napkin 1]
As shown in FIG. 1, the sanitary napkin 1 according to the present invention has a liquid-impervious back sheet 2 made of a polyethylene sheet, a polypropylene sheet, and the like, and a liquid-permeable surface that allows permeation of blood or vaginal discharge quickly. The sheet 3, the absorbent body 4 made of cotton-like pulp or synthetic pulp interposed between the two sheets 2 and 3, and the absorbent body 4 are surrounded to maintain the shape and improve the diffusibility of the absorbent body 4. A crepe paper 5, a second sheet 6 made of a hydrophilic non-woven fabric laminated on the lower layer side of the liquid-permeable surface sheet 3 and interposed between the liquid-permeable surface sheet 3 and the crepe paper 5, and both sides of the surface The side nonwoven fabrics 7 and 7 are arranged along the longitudinal direction. Around the absorbent body 4, at the front and rear edge portions in the napkin longitudinal direction, the outer edge portion of the liquid-impermeable back sheet 2 and the liquid-permeable surface sheet 3 is formed of an adhesive such as hot melt, heat seal, or the like. The liquid-impervious back sheet 2 and the side nonwoven fabric 7 which are joined by an adhesive means and extend laterally from the edge of the absorbent body 4 at both side edges thereof are adhesives such as hot melt or heat. The outer periphery flap part F which is joined by adhesion | attachment means, such as a seal | sticker, and the absorber 4 does not exist in the outer periphery is formed.

Hereinafter, the structure of the sanitary napkin 1 will be described in detail.
As the liquid-impermeable back sheet 2, a sheet material having at least water shielding properties such as an olefin resin sheet such as polyethylene or polypropylene is used. In addition, a laminated nonwoven fabric obtained by laminating a nonwoven fabric on a polyethylene sheet or the like, or A nonwoven fabric sheet (in this case, the waterproof film and the nonwoven fabric constitute a liquid-impervious back sheet) can be used after substantially impervious to liquid imperviousness by interposing a waterproof film. In recent years, those having moisture permeability tend to be used from the viewpoint of preventing stuffiness. This water- and moisture-permeable sheet material is a microporous sheet obtained by forming a sheet by melting and kneading an inorganic filler in an olefin resin such as polyethylene or polypropylene, and then stretching in a uniaxial or biaxial direction. It is.

  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. Of these processing methods, the spunlace method is excellent in terms of flexibility and the spunbond method is excellent in drapeability, and the thermal bond method and the air-through method are 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. It is preferable that the manufacturing method of the absorber 4 is a piled pulp or an airlaid absorber so as to be rich in flexibility.

  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.

  When the crepe paper 5 surrounding the absorbent body 4 is provided as in this example, the crepe paper 5 is interposed between the liquid-permeable surface sheet 3 and the absorbent body 4 as a result. The crepe paper 5 which is excellent in diffusing body fluids quickly prevents reversal of menstrual blood and the like. When an air-laid absorber is used as the absorber 4, the crepe paper 5 may not be used because the absorption performance of the absorber itself is excellent.

  The second sheet 6 made of a hydrophilic non-woven fabric laminated on the lower layer side of the liquid permeable surface sheet 3 is made of, for example, synthetic fibers such as polyethylene or polypropylene, olefin-based, polyester-based, polyamide-based synthetic fibers, rayon, cupra, etc. Natural fibers such as recycled fibers and cotton can be used, and nonwoven fabrics obtained by appropriate processing methods such as the spunlace method, the spunbond method, the thermal bond method, the melt blown method, and the needle punch method can be used. In order to impart hydrophilicity, a method of polymerizing a compound having a hydrophilic group, for example, an oxidation product of polyethylene glycol, in the process of producing a synthetic fiber, or treatment with a metal salt such as stannic chloride, Synthetic fibers can be made to swell or become porous by a method such as partially dissolving the surface to make it porous and depositing metal hydroxide, etc., and applying capillary action to impart hydrophilicity.

The laminated portion of the liquid-permeable surface sheet 3, the second sheet 6, and the absorbent body 4 is substantially along the napkin longitudinal direction from the surface side of the liquid-permeable surface sheet 3 in the region including at least the body fluid discharge portion H. A pair of left and right central pressing grooves 9, 9 are provided by an arc-shaped curve having a center of curvature on the longitudinal center line side.

  On the other hand, side non-woven fabrics 7 and 7 are provided on both sides of the sanitary napkin 1 along the longitudinal direction and almost the entire length of the napkin 1, respectively. Wing-like flaps W and W are formed by a part of the liquid-impervious back sheet 2 that extends laterally and also laterally.

  As the side nonwoven fabric 7, a water-repellent treated nonwoven fabric or a hydrophilic treated nonwoven fabric can be used from the viewpoint of an important function. For example, if importance is placed on functions such as preventing the penetration of bodily fluids or enhancing the feeling of touch, it is necessary to use a water-repellent non-woven fabric coated with a silicon-based, paraffin-based, or alkylchromic chloride-based water repellent. desirable. If importance is attached to the absorbability of body fluids in the wing-shaped flaps W, W, a method of polymerizing a compound having a hydrophilic group, for example, an oxidation product of polyethylene glycol, in the synthetic fiber production process, Treating with metal salt such as stannic, partially dissolving the surface to make it porous and making the synthetic fiber swell or porous by applying a metal hydroxide, etc., applying capillary action to impart hydrophilicity It is desirable to use a hydrophilic treated nonwoven fabric.

  When individually mounting the sanitary napkin 1 described above, the sanitary napkin is folded in a state where the wing-shaped flaps W and W are folded to the non-use side (back side) or the use side (front side) at the folding line RL. The packaging sheet is arranged on the outer surface side of 1, and the sanitary napkin 1 and the packaging sheet are both folded inward along the widthwise folding lines X1 and X2 in the longitudinal direction, and the side edges are heat-sealed and opened. The part is fixed with tag tape. The folding may be quadruple folding at the folding lines X1 to X3 (see FIG. 7) or more than that.

[About the shape holding member 20]
In order to open the sanitary napkin 1 in the individually packaged state, the tag tape is picked by hand, the heat seal at the side edge portion is peeled off, the packaging sheet is removed, and the sanitary napkin 1 is taken out. As shown in FIG. 3, the sanitary napkin 1 taken out is folded along the folding lines X1 and X2 on the surface side of the sanitary napkin 1 as shown in FIG. There are creases that fold the front side and the rear side inward.

  In order to eliminate such creases and creases, the sanitary napkin 1 has a linear shape that is long in the width direction of the napkin at the center in the width direction and on the fold lines X1 and X2, as shown in FIG. The shape holding member 20 is disposed along the napkin width direction. For this reason, at the time of opening, after unfolding the three-fold folded state as shown in FIG. 3, the shape holding members 20 and 20 are respectively placed in the center in the longitudinal direction of the member as shown in FIGS. The bending rigidity with respect to the longitudinal direction of the absorbent body 4 is increased by curving so that the portion protrudes toward the napkin surface side, and maintaining the absorbent body 4 in a curved state such that the central portion in the width direction is convex toward the front surface side. The creases and creases caused by the individual packaging described above are eliminated. By attaching the sanitary napkin 1 with no creases or creases as described above to the body in the same way as in the normal case, the napkins can be worn without a sense of incongruity, and there are no creases or creases on the napkin surface. The surface comes into close contact with the skin and leakage can be prevented.

  Furthermore, when the shape-retaining member 20 is located in the crotch part, the napkin width direction central part can be maintained in a state of being raised on the skin side, so that the adhesion between the napkin surface and the skin is improved, and menstrual blood and the like are improved. It can be absorbed reliably.

  In addition, the shape holding member 20 disposed on the fold line X2 on the rear side of the napkin is deformed on the rear side of the napkin along the groove of the hook part by strongly bending the central part in the longitudinal direction of the member according to the shape of the groove of the hook part. It becomes easier and the adhesion with the skin is further improved.

  Here, the “shape holding member” is a linear material made of a material such as polypropylene resin that has a flexibility to be easily deformed when a bending load is applied, and is difficult to restore by maintaining this deformed state. It is a member.

  As shown in FIG. 2, the shape holding member 20 is preferably fixed to the outer surface side (underwear contact surface side) of the liquid-impermeable back sheet 2. The wearer can directly recognize that the holding member 20 is provided. On the other hand, although it is possible to interpose on the skin side with respect to the back sheet 2, it is desirable to dispose on the outer surface side from the absorbent body 4 in order to reduce the uncomfortable feeling on the skin.

  As shown in FIG. 6, the shape-retaining member 20 has a member width dimension of 1 mm ≦ a ≦ 30 mm, preferably 3 mm ≦ a ≦ 10 mm. By setting the width in this range, the absorbent body 4 can be reliably deformed, folds and creases can be eliminated, and there is no sense of incongruity when worn, and further, folding during individual packaging is obstructed. It will not do.

Further, as shown in FIG. 6, the dimension in the longitudinal direction of the member is such that the folding line of the individual packaging is formed in a region where the folding line is in contact with the circumference of the leg of the sanitary napkin 1, that is, the front folding line X1 in the illustrated example. In the case of the shape retaining member 20 disposed on the rear folding line X2, the lengths b1 and b2 can be disposed on both sides from the longitudinal center line CL of the sanitary napkin 1 within a range of 30 mm or less. It is formed with. Furthermore, as shown in FIG. 7, the area is often provided with a pair of left and right compressed grooves 10, so that the rigidity between the compressed grooves 10, 10 is high, and the compressed grooves 10, 10 Considering that it is preferable to raise the gap to the skin side and improve the fit, etc., in order to improve the deformability between the compressed grooves 10, 10, at least the width between the left and right compressed grooves 10, 10 or more It is formed with member longitudinal dimensions b1 and b2. That is, the member longitudinal dimensions b1 and b2 from the longitudinal center line CL are formed to be 30 mm or less and 1/2 or more of the separation width between the compressed grooves 10 and 10. In addition, in the normal sanitary napkin 1, the separation width between the pressing grooves 10 and 10 is less than 60 mm.

  When the fold lines X1 and X2 are provided at positions at the same distance from the urination port H before and after the urination port H, the shape holding member 20 provided in the region that abuts around the legs is the front fold line. The one arranged in X1 and the one arranged in the rear fold line X2 may have the same length in the longitudinal direction of the member. However, as shown in FIGS. In consideration of the fact that the leg is likely to move to the front side at the time of, the shape holding member 20 disposed in the front fold line X1 has a length in the longitudinal direction of the shape holding member 20 disposed in the rear fold line X2. It is preferable to form the holding member 20 relatively shorter than the length in the member longitudinal direction (b1 <b2).

On the other hand, when the fold line of the individual package is formed in a region other than the area where the fold line of the sanitary napkin 1 abuts, that is, in the case of the shape holding member 20 disposed at the rearmost fold line X3 in FIG. The member longitudinal dimension b3 from the longitudinal center line CL may be at least ½ or more of the separation width between the compressed grooves 10 and 10, and is formed to be not less than the width dimension of the absorbent body 4 and not more than the width dimension of the outline. It is preferable to do.

  As shown in FIG. 1 and the like, the shape holding member 20 is arranged as shown in FIG. 8 in addition to the arrangement pattern of the shape holding member 20 provided in the napkin width direction along the fold line. In addition, a plurality of, in the illustrated example, three shape holding members 20, 20... Can be arranged at intervals in the napkin width direction. By providing in such a pattern divided in the longitudinal direction of the member, the bending rigidity of the shape maintaining member 20 is lowered, and the sanitary napkin 1 can be easily deformed more flexibly.

  In addition, as shown in FIG. 9, the shape holding member 20 includes a plurality of shape holding members 20 that are continuous in the napkin width direction and are arranged symmetrically with respect to the folding line X1 of the individual packaging with an interval in the napkin longitudinal direction. Can be set. In the illustrated example, a total of five lines are arranged, one on the folding line X1 and two on the front and rear sides thereof. By disposing in such a pattern, the rigidity is suppressed lower than in the case of disposing one shape holding member over the entire disposition range, and the sanitary napkin 1 is easily deformed. Further, since the shape holding member 20 can be disposed in a wide range in the longitudinal direction of the sanitary napkin 1, folds and creases can be reliably eliminated. In addition, as shown in FIG. 10, the arrangement pattern may be a total of four, not two on the fold line X1 but two on each side of the fold line X1.

  In the case where a plurality of shape holding members 20 are arranged at intervals in the napkin longitudinal direction, it is preferable that the shape holding members 20 are gradually formed thicker as they move away from the individual folding line X1, as shown in FIG. That is, in the example shown in the figure, the relationship is a1 ≦ a2 ≦ a3. By relatively reducing the width of the member in the vicinity of the fold line, the rigidity in the vicinity of the fold line is kept low, so that the sanitary napkin 1 can be easily folded at the fold line during individual packaging. In addition, as FIG. 10 shows, each shape holding member 20 can also be formed with the same width dimension a.

  Moreover, as shown in FIG. 9, it is preferable that the interval between the shape maintaining members 20 and 20 is gradually increased as the distance from the folding line X1 increases. That is, in the illustrated example, they are arranged in a relationship of c1 ≦ c2. By narrowing the space in the vicinity of the fold line, a curved state in which the central portion in the width direction of the sanitary napkin 1 is raised to the skin side can be firmly formed, so that creases and creases can be effectively eliminated. Become. In addition, as shown in FIG. 10, it is also possible to arrange them at the same interval c.

  FIG. 11 shows another arrangement pattern, in which a plurality of shape holding members 20 are arranged at intervals in the napkin width direction and a plurality are arranged at intervals in the napkin longitudinal direction. . In the example of illustration, it arrange | positions in the staggered form so that the separation part of a napkin width direction may not overlap with a napkin longitudinal direction. As a result, the rigidity can be kept low over a wide range, and it becomes easy to deform.

  Next, as shown in FIG. 12, in the sanitary napkin 1 in which the three-dimensional gathers BS and BS standing on the skin side are formed on both sides on the surface side of the sanitary napkin 1, A case where the fold line X1 is located will be described. First, the structure of the three-dimensional gather BS will be described in detail. As shown in FIG. 12 and FIG. 13, the inner side portion of the side nonwoven fabric 7 is folded back almost twice, and the height direction is set inside the double sheet. A thread-like elastic stretchable member 11 having both ends or appropriate positions in the longitudinal direction fixed to the intermediate portion is disposed, and a plurality of, in the illustrated example, two thread-like elastic stretchable members are provided on the upper portion of the thread-like elastic stretchable member 11. 12 and 12 are arranged in a state where both ends or appropriate positions in the longitudinal direction are fixed. At the front and rear end portions of this double sheet portion, it is folded on the cross section Z and adhered to the absorbent body 4 side, thereby forming pockets P and P with an opening facing inward in a cross-sectional shape. However, the three-dimensional gather BS and BS standing on the surface side are formed.

  When the folding line of the individual packaging is located in the standing range of such a three-dimensional gather BS, the three-dimensional gather BS may fold, and the three-dimensional gather BS may not stand up sufficiently. For this reason, as shown in FIG. 12, in addition to the shape holding member 20 along the fold line X1, the napkin is placed in a region overlapping the three-dimensional gather BS so as to straddle the fold line X1 located in the standing range of the three-dimensional gather BS. It is preferable to arrange | position the 2nd shape holding member 21 along a longitudinal direction. Thereby, at the time of wearing, by returning the second shape holding member 21 bent by individual packaging to a straight line, or deforming the second shape holding member 21 into a curved shape with the napkin longitudinal direction central part raised on the skin side, The folds of the three-dimensional gather BS are eliminated, and a sufficient standing of the three-dimensional gather BS is ensured.

  As shown in detail in FIG. 14, the second shape holding member 21 is a substantially rectangular member that is long in the napkin longitudinal direction. Although it is good also as the same bending rigidity over the full length of a member, it is preferable to make the bending rigidity of the both ends 21a of a member longitudinal direction low compared with the bending rigidity of the center part 21b. As a result, folding can be easily corrected without interfering with folding during individual packaging. In order to make the bending rigidity of the both end portions 21a relatively low, the both end portions 21a may be made thinner or narrower than the center portion 21b.

  By the way, it is preferable to change the rigidity of the shape holding member 20 in accordance with the rigidity of the absorber 4. That is, an absorbent body having no stiffness such as an air laid absorbent body is likely to have creases or creases when the individual package is folded. In the case of an absorbent body that is firm, on the contrary, since it is difficult to fold or crease when folded, it is possible to use the shape holding member 20 having relatively low rigidity. preferable.

  In fixing the shape-retaining member 20, as shown in FIG. 15, a method of adhering to the anti-slip adhesive layers 13, 13. , Adopting a method of intermittently or continuously joining to the outer surface side of the liquid-impervious back sheet 2 along the longitudinal direction of the member, at least at both ends and the center by an adhesive such as heat seal or hot melt can do.

  As the shape holding member 20, a linear member that is long in the napkin width direction is used in the illustrated example, but various shapes can be used as shown in FIG. 16. For example, (A) is a semicircular arc with a rounded end so that the end does not feel strange even when it hits the body, and (B) is a napkin width with reduced rigidity. In order to make it easier to bend and deform in the direction, it is a wavy line, and (C) shows that both ends from the central part in the longitudinal direction of the member are reduced in order to make it easier to bend and deform in the napkin width direction by reducing the rigidity on both sides of the longitudinal direction of the member. It is formed so as to gradually become narrower toward the part.

DESCRIPTION OF SYMBOLS 1 ... Sanitary napkin, 2 ... Impervious back sheet, 3 ... Impervious surface sheet, 4 ... Absorber, 5 ... Crepe paper, 6 ... Second sheet, 7 ... Side nonwoven fabric, 9/10 ... Squeeze groove , 20 ... shape holding member, 21 ... second shape holding member, F ... outer peripheral flap, W ... wing-shaped flap, X1, X2, X3 ... folding line

Claims (7)

In the absorbent article that is foldable in the longitudinal direction at the folding line in the width direction at the time of individual packaging, with the absorbent body interposed between the liquid-permeable top sheet and the back sheet,
A flexible line that is long in the width direction of the absorbent article at the center of the absorbent article in the width direction and on and / or in the vicinity of the fold line and easily deforms when a bending load is applied. The shape-retaining member for the absorbent body made of a material that has a property and is difficult to restore by maintaining this deformed state is on the outer surface side of the back sheet or on the skin side of the back sheet and more than the absorbent body An absorbent article, characterized in that the absorbent article is disposed along the width direction of the absorbent article , interposed on the outer surface side . The absorbent article is provided with a pair of left and right pressing grooves on the surface side of the liquid-permeable top sheet,
A member longitudinal dimension of the shape maintaining member is formed with a length that can be arranged in a range of 30 mm or less on each side from the longitudinal center line of the absorbent article, and at least a separation width between the pair of left and right pressing grooves. The absorbent article according to claim 1, wherein the absorbent article is formed with a length of.   The absorbent article according to any one of claims 1 and 2, wherein a plurality of the shape holding members are arranged at intervals in the width direction of the absorbent article.   The absorbent article according to any one of claims 1 to 3, wherein a plurality of the shape holding members are disposed at intervals in the longitudinal direction of the absorbent article.   The absorbent article according to claim 4, wherein a member width dimension of the shape maintaining member is formed so as to gradually increase as the distance from the fold line increases.   The absorptive article according to any one of claims 4 and 5, wherein the interval between the shape holding members is disposed so as to gradually increase as the distance from the fold line increases. Three-dimensional gathers standing on the skin side are formed on both sides on the surface side of the absorbent article,
When the fold line is formed in the standing range of the three-dimensional gather, the fold line formed in the standing range of the three-dimensional gather is straddled, and the region overlapping the standing range of the three-dimensional gather is along the longitudinal direction of the absorbent article. The absorbent article in any one of Claims 1-6 by which the 2nd shape holding member is arrange | positioned.

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