JP2019058427A - Absorbent article - Google Patents

Abstract

To provide an absorbent article which follows to movement of a body, which fits to a body, for preventing leakage, and achieving preferable wearing feeling.SOLUTION: A sanitary napkin 1 is configured so that, a cut 10, a notch 12 or a perforation 13 extended from a rear end of the sanitary napkin to inward, is provided, and on an outer face of a non-liquid permeable rear surface sheet 2 on at least one side of left and right both sides of the cut 10, notch 12 or perforation 13, a junction 11 for joining and overlapping left and right end parts which are divided by the cut 10, notch 12 or perforation 13 in use of the sanitary napkin 1 is provided.SELECTED DRAWING: Figure 1

Description

  The present invention relates to absorbent articles such as sanitary napkins, panty liners, incontinence pads and the like, and more particularly to an absorbent article formed so that the rear end can be bent and deformed toward the skin side during use.

  Conventionally, cotton-like pulp or the like is interposed between the liquid-impervious back sheet made of polyethylene sheet or polyethylene sheet-laminated non-woven fabric and the like and the liquid-permeable surface sheet made of non-woven fabric or porous plastic sheet as the above absorbent article. The thing which made the absorber which consists of intervenes is known.

  In the absorbent articles of this type, various improvements have been made to prevent leakage of body fluid and the like. For example, in Patent Document 1 below, an excretory part flexible axis which is located on a longitudinally extending center line and extends over the excretory part facing part, and which is located on a longitudinally extending center line and which extends An absorbent article having a front flexible shaft extending to the front side and a rear flexible shaft positioned on the longitudinally extending center line and extending to the rear side of the discharge portion flexible shaft, which is removed from the packaging material When it is placed under stress, it is bent convexly on the surface sheet side by the flexible part in the excretory part, and is bent convexly on the back sheet side by the front flexible axis and the rear flexible axis An absorbent article is disclosed.

  Further, in Patent Document 2 below, a first flexible shaft and a second flexible shaft are provided on the central long axis in the longitudinal direction and the central short axis in the width direction of the absorbent article, respectively. The flexible shaft is formed so as to be easily bent in a convex shape toward the surface material side on the first flexible shaft in the rear portion than the second flexible shaft, and the second flexible The absorbent article is formed so as to be easily bent concavely to the surface material side by the first flexible axis in the front portion of the bending axis, and the second flexible axis is formed by the absorbent article. An absorbent article is disclosed which is formed so as to be easily bent concavely on the surface material side by the second flexible shaft.

Unexamined-Japanese-Patent No. 2017-108869 JP-A-4-341261

  Although the absorbent articles described in the above-mentioned Patent Documents 1 and 2 try to fit the body by bending the absorbent article at a predetermined flexible axis and try to reduce the leakage, the absorbent articles The fit is not considered, and when the edge of the absorbent article does not fit in the body, it causes a problem of causing leakage of body fluid and deterioration of the wearing feeling. In particular, when the rear end of the absorbent article does not fit into the buttocks, a gap is generated between the absorbent article and the body when the leg is moved during exercise or when moving up or down stairs, etc. There was a risk of leakage. When using a large absorbent article or using an unfamiliar tampon in order to prevent such a leak, the user had to always feel uncomfortable and live. In addition, when an absorbent article which does not fit in the body is used, rubbing with the skin is likely to occur, which causes skin problems such as itching.

  Therefore, the main object of the present invention is to provide an absorbent article that follows the movement of the body and fits to the body to prevent leakage and to have a good wearing feeling.

In order to solve the above problems, according to the present invention according to claim 1, in an absorbent article in which an absorbent is interposed between a liquid-permeable top sheet and a back sheet,
The absorbent article is provided with a cut, a notch or a perforation extending inward from the rear end of the absorbent article, and the absorption is performed on the outer surface of the back sheet on at least one of the left and right sides of the cut, the notch or the perforation. An absorbent article is provided, which is provided with a joint for overlapping and joining the left and right ends divided by the notches, notches or perforations when using the elastic article. .

  In the invention according to the first aspect, when the absorbent article is used, the rear end of the absorbent article is skinned by superposing the left and right ends divided by the incision etc. It is designed to be able to be worn while being bent and deformed toward the side. As a result, the rear end of the absorbent article has a three-dimensional shape fitted to the shape of the buttocks, so it becomes easy to follow the movement of the leg, etc., and leakage of body fluid can be prevented. In addition, since the rear end of the absorbent article fits the body, the wearing feeling is improved.

  According to a second aspect of the present invention, there is provided the absorbent article according to the first aspect, wherein the absorber is provided on the front side of the cut, notch or perforation.

  In the invention according to the second aspect, the absorber is provided in the area on the front side of the incision or the like. That is, the incisions and the like are provided in a range not reaching the absorber. For this reason, the rear end portion of the absorbent article provided with the incision or the like is easily bent and deformed toward the skin side, and the fit with respect to the buttocks is improved.

  The present invention according to claim 3 provides the absorbent article according to claim 1, wherein the absorbent body extends to both the cut, notch or perforation side portions.

  In the invention according to the third aspect, since the absorber extends to both side portions such as the incisions, the left and right end portions divided by the incisions and the like are overlapped when using the absorbent article. By bonding at the bonding portion, the absorber is interposed to a portion which is bent and deformed along the shape of the buttocks, and the absorption capacity of the absorbent article can be improved.

  As the present invention according to claim 4, the incisions, the notches or the perforations are provided on a longitudinal center line of the absorbent article or provided at a position deviated in the width direction of the absorbent article. An absorbent article according to any one of Items 1 to 3 is provided.

  In the invention according to the fourth aspect, when the incision or the like is provided on the longitudinal center line of the absorbent article, the left and right end portions divided by the incision or the like are overlapped when using the absorbent article. In the state of being joined at the joint portion, the incisions and the like are disposed at a position inclined with respect to the buttocks groove, so that the body fluid flowing along the buttocks groove is received at the other portions than the incisions and the like Thus, body fluid can be prevented from leaking to the outside through the gaps such as the incisions. On the other hand, when the incisions or the like are provided at a position deviated in the width direction of the absorbent article, the body fluid flowing along the buttock groove is similarly received at parts other than the incisions or the like during mounting. Leakage of body fluid can be prevented.

  In the present invention according to claim 5, when the left and right ends divided by the notches, notches or perforations are superposed and joined at the joint portion, the rear end of the absorbent article is bent and deformed. The absorbent article according to any one of claims 1 to 4, wherein the skin contact surface of the liquid-pervious surface sheet is provided with an embossed groove which is recessed toward the non-skin side along the base end to be .

  In the invention according to the fifth aspect, the non-skin contact surface is in contact with the skin contact surface of the liquid-permeable surface sheet along the base end where the rear end of the absorbent article is bent and deformed when using the absorbent article. Since the emboss groove which is recessed on the side is provided, the rear end portion of the absorbent article is easily bent and deformed with the emboss groove as a flexible axis, and the fit can be further improved.

  As the present invention according to claim 6, the embossed groove is provided in each of the left and right regions bordering on the longitudinal center line of the absorbent article, or continuously across the left and right regions. The absorbent article according to claim 5 provided.

  In the invention according to the sixth aspect, when the emboss grooves are provided in the respective left and right regions, the emboss grooves provided in the respective regions can cope with different deformations and movements in the respective left and right regions. As a result, the fit of the absorbent article can be further improved. On the other hand, when the emboss groove is continuously provided over the left side area and the right side area, the rear end of the absorbent article is more easily bent and deformed, and the bent and deformed state can be maintained. .

  As described above, according to the present invention, by following the movement of the body and fitting to the body, leakage can be prevented and the wearing feeling is improved.

It is a partially broken development view of the sanitary napkin 1 according to the present invention. It is an II-II arrow line view of FIG. FIG. 2 is a back view of the sanitary napkin 1; It is a perspective view which shows the use condition of the sanitary napkin 1. FIG. It is an expanded view (the 1) of the sanitary napkin 1 which concerns on a modification. It is an expanded view (the 2) of the sanitary napkin 1 which concerns on a modification. (A), (B) is an expanded view (the 3) of the sanitary napkin 1 which concerns on a modification. (A), (B) is an expanded view (the 4) of the sanitary napkin 1 which concerns on a modification. It is a back view of the sanitary napkin 1 which concerns on a modification. (A) and (B) are the expanded views (the 5) of the sanitary napkin 1 which concerns on a modification.

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

[Basic configuration of sanitary napkin 1]
The sanitary napkin 1 according to the present invention, as shown in FIGS. 1 and 2, has a liquid-permeable back sheet 2 made of a polyethylene sheet, a polypropylene sheet, etc. An absorbent body 4 comprising a liquid surface sheet 3 and cotton-like pulp or synthetic pulp interposed between the both sheets 2 and 3, and the absorbent body 4 for improving shape retention and diffusion of the absorbent body 4 And a side sheet 7, 7 disposed along the longitudinal direction on each side of the skin contact surface side. Further, at the front and rear end edges of the absorbent body 4 in the longitudinal direction of the napkin, the outer edge portions of the liquid-impervious back sheet 2 and the liquid-permeable top sheet 3 are adhesive such as hot melt or heat seal The liquid-impervious back sheet 2 and the side sheet 7 which are joined by joining means such as an ultrasonic seal, and which extend laterally beyond the side edge of the absorber 4 at the side edges thereof Are bonded by a bonding means such as an adhesive or a heat seal or an ultrasonic seal, and an outer peripheral flap portion in which the absorber 4 is not present is formed on the outer peripheral.

Hereinafter, the structure of the sanitary napkin 1 will be described in more detail,
The liquid-impervious back sheet 2 is a sheet material having at least water blocking properties such as an olefin-based resin sheet such as polyethylene or polypropylene, etc. In addition to this, a laminated non-woven fabric obtained by laminating non-woven fabric on polyethylene sheet etc. A non-woven fabric sheet (in this case, a liquid-impervious back sheet is composed of the waterproof film and the non-woven fabric) can be used after the liquid-imperviousness is substantially ensured by interposing the waterproof film. In recent years, it has tended to use what has moisture permeability from a viewpoint of muzzle prevention. This water-impervious and moisture-permeable sheet material is 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 is.

  Next, a porous or non-porous non-woven fabric, a porous plastic sheet or the like is suitably used as the liquid-permeable surface sheet 3. 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, natural fibers such as cotton, etc. A nonwoven fabric obtained by an appropriate processing method such as a method, a spun bond method, a thermal bond method, a meltblown method, a needle punch method can be used. Among these processing methods, the spun lace method is excellent in flexibility and drapability, and the thermal bonding method is excellent in bulkiness and high compression recovery. When a large number of through holes are formed in the liquid-permeable surface sheet 3, the body fluid is rapidly absorbed, and the dry touch property is excellent. The non-woven fibers may be either long fibers or short fibers, but preferably short fibers are used to give a towel texture. Further, in order to facilitate the embossing process, it is preferable to use an olefin-based fiber such as polyethylene or polypropylene having a relatively low melting point. In addition, a core-sheath fiber, a side-by-side fiber, or a split fiber composite fiber in which a fiber having a high melting point is used as a core and a fiber having a low melting point is sheathed can be suitably used.

  In this sanitary napkin 1, as will be described in detail later, when using the sanitary napkin 1, the left and right end portions divided by the incision 10 are overlapped, and the outer surface of the liquid-impervious back sheet 2 on one side As the liquid-pervious top sheet 3 so that the joint 11 can be easily joined to the liquid-permeable top sheet 3 in order to join the joint 11 provided on the other side to the liquid-permeable top sheet 3 on the other side. It is preferable to use one with less fluff on the surface. Specifically, it is preferable to use a non-woven fabric obtained by a spun bonding method or a thermal bonding method, a porous plastic sheet or the like.

  The absorbent 4 interposed between the liquid-impervious backsheet 2 and the liquid-permeable topsheet 3 is, for example, one obtained by mixing a highly water-absorbent resin in the pulp, or mixed with chemical fibers in the pulp. And those mixed with a super absorbent resin are used. As shown in the figure, the absorbent body 4 is made of a covering sheet 5 made of crepe paper or non-woven fabric to keep shape and diffuse menstrual blood etc. promptly and to prevent reversion of menstrual blood etc. once absorbed. It is a go. Examples of the pulp include cellulose fibers obtained from wood, such as melt pulp, and artificial cellulose fibers such as rayon and acetate. Softwood pulp having a longer fiber length than the hardwood pulp functions more It is suitably used in terms of price. In addition, an air-laid absorbent body which can reduce the bulk, or a polymer sheet formed by arranging a highly water-absorbent resin between two non-woven fabric layers may be used as the absorbent body 4.

  In addition, synthetic fibers may be mixed in the absorber 4. Examples of the synthetic fibers include polyolefins such as polyethylene and polypropylene, polyesters such as polyethylene terephthalate and polybutylene terephthalate, polyamides such as nylon, copolymers of these, and the like. It may be a mixture. 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 may be used. In the case of a hydrophobic fiber, it is desirable to use the synthetic fiber surface-treated with a hydrophilizing agent so as to have an affinity for body fluid.

  Examples of the superabsorbent polymer include crosslinked polyacrylates, self-crosslinked polyacrylates, saponified acrylic acid ester-vinyl acetate copolymer crosslinked products, crosslinked isobutylene / maleic anhydride copolymers, Examples thereof include crosslinked polysulfonates and partially crosslinked water-swellable polymers such as polyethylene oxide and polyacrylamide. Among these, acrylic acid or acrylate based ones excellent in water absorption amount and water absorption speed are preferable. The highly water-absorbent resin having the water absorption performance can adjust the water absorption capacity and the water absorption speed by adjusting the crosslink density and the crosslink density gradient in the production process.

  It is possible to use crepe paper and nonwoven fabrics, such as thin paper and tissue paper, as the covering sheet 5 which surrounds the said absorber 4. As shown in FIG. The fiber material constituting the crepe paper is preferably made of 100% of pulp fibers, and is preferably softwood pulp and hardwood pulp used for thin paper and tissue paper. The hydrophilic property is preferably a spunbond non-woven fabric or an SMS non-woven fabric (SMS, SSMMS, etc.), and the material can be polypropylene, polyethylene / polypropylene composite material, etc. As in this example, in the case where the encapsulation sheet 5 surrounding the absorber 4 is provided, as a result, the encapsulation sheet 5 intervenes between the liquid-pervious surface sheet 3 and the absorber 4, The body sheet is rapidly diffused by the covering sheet 5 having excellent absorbability, and the reversion of menstrual blood and the like is prevented.

  On the other hand, side sheets 7, 7 are provided along the longitudinal direction and substantially the entire length of the napkin 1 on both sides of the skin contact surface side of the sanitary napkin 1, respectively. Wing-shaped flaps W, W projecting outward on both sides of the body portion by a portion extending laterally and a portion of the liquid-permeable back sheet 2 also extending laterally It is formed. The wing-shaped flaps W, W are folded back at the fold line RL (FIG. 1) at the proximal end so as to wrap the crotch portion of the undergarment at the time of wearing. By sticking the anti-slip adhesive layer 9 (FIG. 3) provided on the outer surface of the sheet 2 on the outer surface of the undergarment, it is intended to prevent the displacement with the undergarment.

  A water repellent treated nonwoven fabric or a hydrophilic treated nonwoven fabric can be used as the side sheet 7 from the viewpoint of the function to be emphasized. For example, if importance is attached to the function of preventing menstrual blood and vaginal discharge from permeating, or enhancing the feel of the touch, a water repellent treatment coated with a silicone, paraffin or alkylchromic chloride water repellent etc. It is desirable to use a non-woven fabric. Also, if emphasis is placed on the absorbability of the wing-shaped flap W, such as menstrual blood, a method of causing a compound having a hydrophilic group, for example, an oxidized product of polyethylene glycol, etc. to coexist in the production process of synthetic fiber Treated with a metal salt such as stannic chloride, and the surface is partially dissolved to make the surface porous and deposit metal hydroxide, etc. to make the synthetic fiber swell or porous, and apply capillary action to make it hydrophilic It is desirable to use a hydrophilic treated nonwoven fabric given The inward side portion of the side sheet 7 is substantially double-folded, and one or a plurality of thread-like elastic stretchable members (not shown) in which appropriate positions in both ends or the longitudinal direction are fixed inside the double sheet. By arranging along the longitudinal direction of the sanitary napkin 1, as shown in FIG. 4, the sanitary napkin 1 is concave toward the skin contact surface side along the longitudinal direction under no load (natural state) It may be formed to be curved.

  As shown in FIG. 3, the non-skin contact surface of the main body portion in which the absorber 4 is interposed between the liquid-permeable top sheet 3 and the liquid-impervious back sheet 2 (water-impermeable back sheet 2 On the outer surface side of the body, a plurality of, in the illustrated example, three main body anti-slip adhesive layers 8, 8... Are formed by an appropriate application pattern for fixing to the undergarment. Further, on the surface of the wing-shaped flaps W, W on the liquid-impervious back sheet 2 side, a wing slip prevention pressure-sensitive adhesive layer 9 is formed. The main body anti-slip adhesive layer 8 and the wing anti-slip adhesive layer 9 are covered with a release material until the sanitary napkin 1 is used.

  As the pressure-sensitive adhesive for forming the anti-slip adhesive layers 8 and 9, for example, one having a styrene-based polymer, a tackifier, or a plasticizer as a main component is suitably used. Examples of the styrene-based polymer include a styrene-ethylene-butylene-styrene block copolymer, a styrene-butylene-styrene block copolymer, a styrene-isobutylene-styrene copolymer, etc. It may be used or a blend of two or more polymers. Among these, styrene-ethylene-butylene-styrene block copolymers are preferable in that they have good thermal stability. Further, as the tackifier and the plasticizer, those which are solid at normal temperature can be preferably used, and as the tackifier, for example, C5 petroleum resin, C9 petroleum resin, dicyclopentadiene petroleum resin, rosin petroleum resin And polyterpene resins, terpene phenol resins, etc. Examples of the plasticizer include monomer plasticizers such as triflecil phosphate, dibutyl phthalate and dioctyl phthalate, and polymer plasticizers such as vinyl polymers and polyesters. Be

  Further, as a method of applying the pressure-sensitive adhesive, for example, a known application method (for example, spray application, blade coating, etc.) such as contact type slot method, non-contact type spiral method, omega method, beat method, curtain method, etc. Etc.) can be adopted.

[Structure of rear end of sanitary napkin 1]
Next, the structure of the rear end portion which is a characteristic portion of the sanitary napkin 1 will be described. In this sanitary napkin 1, as shown in FIGS. 1 and 3, a cut 10 extending from the rear end to the inner side of the sanitary napkin 1 is provided, and at least one of the left and right sides of the cut 10 is defective. The outer surface (non-skin contact surface) of the liquid-pervious backsheet 2 is provided with a bonding portion 11 for overlapping and bonding the left and right ends divided by the incision 10 when using the sanitary napkin 1 It is done. The incision 10 extends from the rear edge of the sanitary napkin 1 along the substantially longitudinal direction of the sanitary napkin 1 toward the front of the sanitary napkin 1, and the rear end of the sanitary napkin 1 is It is separated into right and left bordering on the cut 10.

  When using the sanitary napkin 1, as shown in FIG. 4, the left and right ends divided by the incision 10 are superimposed and provided on the outer surface of the liquid-impervious back sheet 2 on one side. By bonding the joint portion 11 to the outer surface (skin contact surface) of the liquid-permeable surface sheet 3 on the other side, the rear end portion of the sanitary napkin 1 is worn in a state of being bent and deformed toward the skin side. .

  As a result, the rear end of the sanitary napkin 1 has a three-dimensional shape fitted to the shape of the buttocks, so that the state in which the surface of the sanitary napkin 1 is in close contact with the skin continues to the movement of the legs. It becomes possible to prevent the leakage of body fluid. In addition, since the rear end of the sanitary napkin 1 fits the body, the wearing feeling is improved.

  Further, as shown in FIG. 4, since the rear end portion of the sanitary napkin 1 is bent and deformed to the skin side in the form of a boat tip, the body fluid flowing from the front to the back is bent. It is folded back in a wave-like manner by the deformed portion so that leakage from the rear end can be reliably prevented.

  The cut 10 is a linear cut portion cut by a cutter or the like, and the left and right edges separated by the cut portion are disposed so as to substantially face each other. In the sanitary napkin 1, instead of the incisions 10, as shown in FIG. The notch 12 is a portion cut in a substantially V-shape, and left and right end edges separated by the notch are spaced apart in a substantially V-shape. Furthermore, as shown in FIG. 6, perforations 13 for forming the incisions or notches (in the example shown, incisions) are formed, and the user cuts off the perforations 13 for use in the incision 10 or the like. The form which forms the notch 12 is also employable.

  The incision 10 can be formed at any position as long as it is the rear end edge of the sanitary napkin 1. However, when the sanitary napkin 1 is used, the end portions of the incision 10 overlapped on the skin contact surface side in a state where the left and right end portions divided by the incision 10 are overlapped and joined by the joining portion 11 Is not preferable because the body fluid flowing backward along the buttocks groove is likely to leak out to the outside through the gap of the incision 10 if it is located on the longitudinal center line CL of the sanitary napkin 1. .

  Therefore, the incision 10 may be provided along the longitudinal center line CL of the sanitary napkin 1 along the longitudinal direction of the sanitary napkin 1 as shown in FIG. 1 or as shown in FIG. It is preferable to form at a position biased in the width direction of the napkin 1.

  When the incision 10 is provided on the longitudinal center line CL, the skin contact surface in a state in which the left and right end portions divided by the incision 10 are overlapped and joined at the joining portion 11 in use. Since the end of the incision 10 stacked on the side is always located at a position inclined with respect to the buttocks groove, the body fluid flowing along the buttocks groove can be received by a portion other than the incision 10, Leakage of body fluid to the outside through the gap of the incision 10 can be prevented.

  Similarly, when the incision 10 is provided at a position deviated in the width direction of the sanitary napkin 1, the left and right end portions divided by the incision 10 are superposed and joined at the joining portion 11 in use. In this state, the end of the incision 10 overlapped on the skin contact surface side is formed at a position different from the extending direction of the buttock groove, so the body fluid flowing along the buttock groove is not the incision 10 It can be received at a part, and it can prevent that a bodily fluid leaks outside through a crevice of the above-mentioned cut 10. The above-mentioned position biased in the width direction is a position deviated from the longitudinal center line CL in the width direction of the sanitary napkin 1, and as shown in FIG. 7A, the rear end of the incision 10 When the part is provided at a position deviated from the longitudinal center line CL, and the front end of the incision 10 is provided on the longitudinal center line CL, or as shown in FIG. 7B, after the incision 10 It includes the case where the side end and the front end are provided at a position deviated from the longitudinal center line CL.

  The absorber 4 can be provided on the front side of the incision 10 as shown in FIG. That is, the incision 10 is provided in the range which does not reach the absorber 4. Thereby, when using the sanitary napkin 1, the rear end portion of the sanitary napkin 1 is directed to the skin side in a state in which the left and right end portions divided by the incision 10 are overlapped and joined by the joint portion 11. It is easy to bend and deform, and the fit to the buttocks is improved. In addition, since the incision 10 is provided in a range not reaching the absorbent body 4, the incision 10 does not affect the absorption performance of the sanitary napkin 1, and the original absorption performance of the sanitary napkin 1 can be maintained. Furthermore, when the front end of the incision 10 is positioned in the vicinity of the rear end of the absorbent body 4, the rear end of the sanitary napkin 1 is formed with the rear end edge of the absorbent body 4 as the proximal end. It becomes easy to bend and deform toward the skin side, and the fit with the body can be further improved. The separation distance (shortest distance) between the front end of the incision 10 and the rear end of the absorber 4 is about 1 to 5 mm, preferably about 1 to 3 mm.

  On the other hand, the absorber 4 may be extended to both sides of the incision 10 as shown in FIG. Thereby, when using the sanitary napkin 1, the absorbent body 4 is a portion which is bent and deformed along the shape of the buttocks by overlapping the left and right end portions divided by the incision 10 and joining them by the joint portion 11. As a result, the absorption capacity of the sanitary napkin 1 can be improved. As shown in FIG. 8A, the absorbent body 4 may be formed integrally as a body portion 4A including a body fluid discharge site of the user and both side portions 4B of the incision 10 being continuous. As shown in FIG. 8B, the main body portion 4A may be formed separately from the both side portions 4B of the incision 10. When formed separately, the flexible shaft between the main body portion 4A and the both side portions 4B of the incision 10 is a flexible axis, and the rear end portion of the sanitary napkin 1 is easily bent and deformed to the skin side. , The preferred form.

  The length of the incision 10 is 10 to 50 mm, preferably 25 to 30 mm. As shown in FIG. 5, the separation width c of the rear end of the notch 12 may be 5 to 15 mm.

  In the embodiment described above, the incisions 10 are provided at only one place at the rear end of the sanitary napkin 1, but the incisions 10 are provided at a plurality of places separated in the width direction at the rear end of the sanitary napkin 1. May be Thereby, when using the sanitary napkin 1, the degree of bending deformation of the rear end portion of the sanitary napkin 1 by bending and deforming any of the plurality of cuts 10, 10. It will be possible to change it gradually. In this case, it is preferable that the cut 10 be formed by the perforations 13 because there is a cut portion which is not bent and deformed depending on the method of use.

  The joint portion 11 is provided on the outer surface (non-skin contact surface) of the liquid-impervious backsheet 2 on at least one side of the left and right sides of the incision 10, and the left and right divided by the incision 10 in use. In the state where the end portions of the upper and lower ends are superimposed, the end portion of the incision 10 on the opposite side is joined to the outer surface (skin contact surface) of the liquid-permeable top sheet 3.

  It is possible to use similarly the adhesive which constitutes the above-mentioned slippage prevention adhesive layers 8 and 9 as the junction part 11. The joint portion 11 is covered with a release material together with the anti-slip adhesive layers 8 and 9 until the sanitary napkin 1 is used.

  The planar shape of the joint portion 11 can be formed in an appropriate form such as a rectangle, a square, a triangle, or a circle as long as the left and right ends divided by the incision 10 can be overlapped. Particularly preferably, as shown in FIG. 9, it is formed in a triangular shape which gradually widens from the front end to the rear end of the incision 10 along the incision 10. As a result, since the front end of the incision 10 is used as a base point, almost the entire surface where the left and right ends divided by the incision 10 are overlapped is joined by the joining portion 11, so that the joining strength is improved. And bending the rear end portion of the sanitary napkin 1 at an angle optimum to fit the shape of the buttocks by overlapping the left and right end portions according to the size of the joint portion 11 Will be able to When the joint portion 11 is formed in a triangular shape, as shown in FIG. 9, the side length a along the cut 10 and the side extending in the substantially width direction of the sanitary napkin 1 from the rear end of the cut 10 The ratio a / b to the length b may be 1 to 3, preferably 1.5 to 2.5.

  In the above-described embodiment, the bonding portion 11 is provided only on one side of the cut 10. However, the bonding portion 11 may be provided on the left and right sides of the cut 10, respectively. Thereby, the junction part 11 of one side can be used for joining when the edge parts on either side overlap, and the junction part 11 of the other side can be used as a slip stopper with respect to underwear. In addition, by providing the joint portions 11 on the left and right sides of the incision 10, it is possible to overlap in any direction, and the assembling operation of the sanitary napkin 1 in use becomes easy.

  As shown in FIG. 1, when attaching the sanitary napkin 1, when the left and right end portions divided by the incision 10 are overlapped and joined by the joint portion 11, the rear end of the sanitary napkin 1 is obtained. Preferably, the skin contact surface of the liquid-permeable top sheet 3 is provided with an embossed groove 14 which is recessed toward the non-skin side along the base end where the portion is bent and deformed. As a result, with the embossed groove 14 as a flexible shaft, the rear end portion of the sanitary napkin 1 is easily bent and deformed, and the fit can be more reliably improved.

  The embossed groove 14 is formed such that the rear end of the sanitary napkin 1 substantially follows the proximal end where the bending deformation occurs, passes through the front end of the incision 10 or the front side thereof, and the rear end edge of the absorbent body 4 Or it is formed in the position which passes along the vicinity. The embossed groove 14 is preferably formed at a position passing between the absorber 4 and the incision 10, but a part or all of the embossed groove 14 may overlap the absorber 4.

  The embossed groove 14 is formed by squeezing at least the liquid-permeable surface sheet 3 in the thickness direction from the skin contact surface side. The embossed groove 14 may be formed by integrally squeezing the liquid-permeable surface sheet 3 and the absorber 4 when the absorber 4 extends to both sides of the incision 10. Good.

  As shown in FIG. 1, one embossed groove 14 can be provided in each of the left and right regions bordering on the longitudinal center line CL of the sanitary napkin 1. As a result, it becomes possible to cope with different deformations and movements in the left and right regions, and the fit can be further improved. The separation width between the left and right emboss grooves 14 is preferably 0 to 10 mm.

  The emboss grooves 14 may be provided continuously over the left and right regions of the longitudinal center line CL of the sanitary napkin 1 as shown in FIG. As a result, the rear end portion of the sanitary napkin 1 is more easily bent and deformed, and the bent and deformed state can be maintained. The embossed groove 14 is preferably formed to pass through or on the front end of the incision 10 and is formed between the front end of the incision 10 and the rear end of the absorber 4 Is more preferred. Thereby, the rear end portion of the sanitary napkin 1 is easily bent and deformed with the embossed groove 14 as the base end.

  The embossed groove 14 can be formed in an appropriate form such as a straight line, a curved line, a broken line, or a wavy line. Also, it may be a continuous line or a discontinuous line in which the embossed portions and the non-embossed portions are alternately arranged.

  As shown in FIG. 1 and the like, it is preferable that both ends in the width direction of the sanitary napkin 1 extend to the side sheet 7 in the embossed groove 14. As a result, even the portion where the side sheets 7 are stacked can be bent and deformed reliably.

  The groove width of the embossed groove 14 is preferably 1.0 to 2.0 mm. When the groove width is too small, it becomes difficult to become a base end which bends and deforms the rear end portion of the sanitary napkin 1, and when the groove width is too large, it becomes hard to cause discomfort at the time of wearing.

  As shown in FIG. 8A, in the embodiment in which the absorbent body 4 is extended to both sides of the incision 10, the embossed groove 14 is an absorbent body which is extended to both sides of the incision 10. It is preferable to arrange the proximal end of the extension portion 4 B so as to substantially cross the width direction of the sanitary napkin 1. As a result, with the embossed groove 14 as a flexible axis, the extension portion 4B of the absorber is easily bent and deformed at the base end.

  In the sanitary napkin 1 in which perforations 13 for forming the incisions 10 or the notches 12 are formed instead of the incisions 10, the user can use the perforations 13 at the time of use when leakage is a concern due to intense exercise or the like. It can be used separately by cutting and forming the incision 10 or the notch 12 and bending and deforming it into a predetermined shape, and the leg 13 is hardly moved and there is no fear of leakage, so that the perforation 13 is not cut off and the form as it is There are two possible ways to use it:

  As shown in FIG. 3, of the main assembly anti-slip adhesive layers 8, 8... Formed on the outer surface of the liquid-impervious back sheet 2, positions where the incisions 10 do not overlap in the longitudinal direction of the sanitary napkin 1 The main body anti-slip adhesive layer 8 (in the illustrated example, the main body anti-slip adhesive layers 8 and 8 on both sides of the three main body anti-slip adhesive layers 8, 8... It is preferable to extend to the rear end of the sanitary napkin 1 which is bent and deformed to the skin side during use. As a result, it is possible to continuously fix to the undergarment from the main body portion to the rear end portion of the sanitary napkin 1 which is bent and deformed from the body portion, and the state of fitting to the buttocks can be reliably held.

  In the method of manufacturing the sanitary napkin 1 provided with the incisions 10, after the sanitary napkin 1 is produced by the usual method, the incisions 10 are applied to the rear end using a known cutting means such as a die cutter.

  DESCRIPTION OF SYMBOLS 1 ... Sanitary napkin, 2 ... Liquid impermeable back sheet, 3 ... Liquid permeable surface sheet, 4 ... Absorbent body, 5 ... Encapsulation sheet, 7 ... Side non-woven fabric, 10: Notch, 11 ... Junction, 12 ... Notches, 13 ... perforations, 14 ... embossed grooves

Claims (6)

In an absorbent article in which an absorbent is interposed between a liquid-permeable top sheet and a back sheet,
The absorbent article is provided with a cut, a notch or a perforation extending inward from the rear end of the absorbent article, and the absorption is performed on the outer surface of the back sheet on at least one of the left and right sides of the cut, the notch or the perforation. An absorbent article characterized in that a joint for overlapping and joining the left and right ends divided by the notches, the notches or the perforations is provided when using the elastic article.   The absorbent article according to claim 1, wherein the absorbent body is provided on the front side of the cut, notch or perforation.   The absorbent article according to claim 1, wherein the absorbent body extends to both the cut, notch or perforation side portions.   The said incision, notch, or perforation is provided in the longitudinal center line of the said absorbent article, or is provided in the position which deviated in the width direction of the said absorbent article. Absorbent article.   When the left and right ends divided by the incisions, notches or perforations are overlapped and joined at the joint, the rear end of the absorbent article is bent along the proximal end where it is bent and deformed. The absorbent article according to any one of claims 1 to 4, wherein an embossed groove which is recessed to the non-skin side is provided on the skin contact surface of the liquid-pervious surface sheet.   The embossed groove is provided in each of left and right regions bordering on a longitudinal center line of the absorbent article, or continuously provided across the left and right regions. Absorbent article.

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