JP6550310B2 - Absorbent articles - Google Patents

Description

  The present invention relates to an absorbent article such as a urine absorbing pad and an incontinence pad used by being attached to the inner surface of an outer such as a disposable diaper, incontinence pants and a diaper cover, and more specifically, the non-skin side is impervious The present invention relates to an absorbent article capable of selecting a mode of use for simple replacement and a mode of use for auxiliary absorption in which the non-skin side is made permeable.

  Conventionally, as an inner pad such as a urine absorbing pad used by being attached to the inner surface of an outer such as a disposable diaper, there are two modes of use: one for use as the simple replacement and one for use as the auxiliary absorption. It has been known. In the use mode for the simple replacement, the disposable diaper is replaced by replacing only the inner pad that has absorbed urine, for the purpose of reducing the time and effort of frequent replacement of the disposable diaper and reducing the purchase cost of the diaper. The non-skin side of the inner pad is covered with a liquid-impervious sheet material in order to prevent leakage of the urine absorbed by the absorber to the outer side so that it can be used repeatedly. This simple replacement inner pad is mainly used when the pad can be replaced frequently, such as in the daytime.

  On the other hand, in the mode of use for auxiliary absorption, it is used by laminating on the inner surface of the disposable diaper for the purpose of increasing the absorption capacity of the outer of the disposable diaper etc. The non-skin side of the inner pad is covered with a liquid-permeable sheet material so as to be transferred to the disposable diaper absorbent body. This auxiliary absorbent inner pad is mainly used when the pad can not be replaced for a long time, such as at bedtime.

  As described above, it is required that the urine does not overflow in the outer in the use mode for the simple replacement, while the absorption performance of each absorbent body of the inner pad and the outer is effective in the use mode for the auxiliary absorption. It is required that urine migrate smoothly from the inner pad to the outer side in order to utilize it. As such, in the use mode for simple replacement and the use mode for auxiliary absorption, contradictory performance is required.

  In the conventional inner pad, depending on whether the non-skin side sheet material is made liquid impermeable or liquid permeable, only one function can be provided, so the user can use the pad corresponding to each function. I had to prepare two kinds of.

  However, in recent years, many improvements have been made to such pads, and it has been proposed that one pad can be used to select the use mode for simple replacement and the use mode for auxiliary absorption. For example, in Patent Document 1 below, a liquid-permeable top sheet is provided on the inner surface side, an absorbent core for absorbing the liquid having passed through the top sheet is provided inside, and a liquid-impermeable back sheet is provided on the outer surface side, The back sheet discloses an absorbent article in which an opening for passing the liquid that has permeated the absorbent core is formed.

  Further, in Patent Document 2 below, a liquid-permeable top sheet is provided on the inner surface side, an absorbent core for absorbing the liquid transmitted through the top sheet is provided inside, and a liquid-permeable outer surface sheet is provided on the outer surface side. A urine-permeable member having a liquid-permeable area formed to transmit the liquid that has passed through the absorbent core, and the liquid-impermeable back sheet covering substantially the entire area of the outer surface being peelably joined to the outer sheet; A pad is disclosed.

Patent No. 3756000 Patent No. 3519267

  In the absorbent article described in Patent Document 1, the covering sheet for closing the opening is adhered to the outside of the back sheet having the opening through the pressure-sensitive adhesive layer, but for easy replacement In the usage mode of the above, there is a possibility that urine absorbed in the absorber may be exuded to the disposable diaper side of the outer through the opening due to adhesion failure of the coating sheet or the like. In addition, an additional covering sheet is required to close the opening of the back sheet, which increases the material cost and the manufacturing cost. Furthermore, in the use mode for auxiliary absorption in which the opening of the back sheet is opened by removing the covering sheet, urine is smoothly transferred since the urine is transferred only from the inner pad to the outer through the opening. There was a drawback that could not be migrated.

  In the absorbent article described in Patent Document 2, the back sheet is bonded to the outer surface of the outer surface sheet by the adhesive layer and the adhesive layer, and the adhesive layer has a predetermined adhesive strength between the back sheet and the outer surface sheet. The adhesive layer has an adhesive strength that allows the back sheet to be peeled off with hand power, and it is considered that the adhesive layer is hardly adhesive when the back sheet is peeled off. If the adhesive strength is too strong, it will be difficult to peel off the backsheet in the usage mode for auxiliary absorption where the backsheet is removed and used, and conversely if it is too weak, it will be used for simple absorption using the backsheet In the use mode, there is a risk that the back sheet may peel off during use, or urine may leak from the peeled portion.

  Furthermore, in the absorbent articles described in Patent Documents 1 and 2 above, although flat gathers are formed on the flaps on both sides, solid gathers standing on the skin side are provided on both sides of the skin contact surface. Because there is not, there is a possibility that the body fluid transmitted to both sides in the width direction on the surface may leak from the both sides to the outer, particularly in the use mode for simplified absorption.

  Therefore, the main object of the present invention is an absorbent article in which urine leakage to the outer is prevented in the usage mode for simple replacement, and urine can be smoothly transferred to the outer in the usage mode for auxiliary absorption. It is to provide.

In order to solve the above problems, as the present invention according to claim 1, an absorbent body, a liquid-permeable top sheet covering the skin side of the absorbent body, and a liquid-permeable first sheet covering the non-skin side of the absorbent body 1 back sheet, and a second liquid-impervious back sheet covering the non-skin side of the first back sheet,
An adhesive layer is formed on the non-skin side of the first back sheet, and the second back sheet is peelably attached to the adhesive layer, and in both side portions of the top sheet and the first back sheet The second back sheet is disposed so as to extend around both side edges of the top sheet and the first back sheet to the skin side of the top sheet, and the second back sheet extending to the skin side The sheet material continuously provided from the sheet forms a solid gather projecting to the skin side on both sides of the skin side, and the sheet material forming the solid gather has at least both ends in the longitudinal direction of the top sheet. Removably joined to the skin side,
A mode of use as a simple replacement, wherein the non-skin side is covered with the second back sheet and the solid gather is formed on both sides of the skin side, and the inner surface is mounted on the outer surface of the outer and used With the backsheet removed and the solid gather removed, the pressure sensitive adhesive layer is adhered to the inner surface of the outer in a state where the pressure sensitive adhesive layer is exposed, and the use mode for auxiliary absorption can be selected. absorbent article characterized in that it it is provided.

  In the invention according to the first aspect, the non-skin side is covered with the second liquid-impervious second back sheet, and in a state in which the solid gathers projecting to the skin side are formed on both sides of the skin side, a disposable diaper etc. Use mode for simple replacement to be used by attaching to the inner surface of the outer, and the pressure-sensitive adhesive layer formed on the non-skin side of the first back sheet by removing the second back sheet and removing the solid gather It is possible to select a mode of use for auxiliary absorption in which the pressure-sensitive adhesive layer is attached to the inner surface of the outer layer in a state in which is exposed.

  In the use mode for the simple replacement, since the urine is blocked by the three-dimensional gathers, it is possible to reliably prevent urine leakage to the outer from both sides. The second back sheet is disposed on both sides of the top sheet and the first back sheet so as to extend around the side edges of the top sheet and the first back sheet to the skin side of the top sheet. Therefore, the leakage of urine from the side edges is eliminated, and it is possible to prevent the urine from exuding to the outer.

  On the other hand, in the mode of use for auxiliary absorption, when the second back sheet including the solid gather is removed, the second back sheet covers the pressure-sensitive adhesive layer so as to be peelable, Can be easily removed, and the liquid-impervious second back sheet is completely removed, and the entire non-skin side is covered by the liquid-permeable first back sheet, so urine moves smoothly to the outer become able to.

The range for forming the pressure-sensitive adhesive layer is a range that does not impair the liquid permeation function of the first back sheet, and specifically, 50% or less, preferably 10 to 40% of the area of the first back sheet It is good to form by degree. Further, the pressure-sensitive adhesive layer is disposed in a stripe shape in which a plurality of the adhesive layers having a width of 2 to 30 mm are provided substantially at equal intervals in the width direction along the longitudinal direction of the absorbent article In addition, one with a width of 2 to 30 mm is disposed along the width direction of the absorbent article. The basis weight of the pressure-sensitive adhesive layer is preferably 15 to 30 g / m ² .

  The height of the solid gather is preferably lower than that of the outer tape or the solid gather of the pants when attached, and is preferably 10 to 40 mm. Moreover, about the tension of the elastic elastic member arrange | positioned by this solid gather, it is desirable that it is 100 to 300% (the natural state is made into 0% and the elongation rate from this state is 2 to 4 times).

In the invention described in claim 1, wherein, when the forming the standing gather protruding skin side must join the longitudinal ends of the sheet material forming the stereo gathers on the top sheet side, As the joint portion, one that can be joined to the top sheet in a removable state, such as a mechanical joint means or an adhesive joint means having an adhesive power that can be peeled off by hand, is used. Therefore, in the mode of use for auxiliary absorption, the second back sheet including the solid gather can be easily removed.

According to the second aspect of the present invention, the top sheet extending laterally beyond the side edge of the absorber and the first back sheet form a side flap portion without the absorber. the absorbent article of the side flaps in the longitudinal direction intermediate portion to the resilient and elastic members arranged the plane gathers mounting according to claim 1 Symbol is formed a along the longitudinal direction is provided.

In the invention according to the second aspect , since the flat gathers are formed in the side flaps, the fit around the legs is improved and leakage can be prevented, and the flat gathers are used as the top sheet and the first back sheet. Since it is formed of the laminated portion of the above, the function as a flat gather can be exhibited both in the mode of use for the simple replacement and in the mode of use for auxiliary absorption.

As the present invention according to claim 3, wherein the standing gathers, the second or formed by the back sheet, the claims are formed by the bonded gather nonwoven fabric end 1 of the second backsheet, 2 either An absorbent article according to any one of the above is provided.

In the invention according to the third aspect, the solid gather may be formed by the second back sheet extended to the skin side, or formed by a separate gather non-woven fabric joined to the front end of the second back sheet. It also prescribes good things. When the solid gather is formed by the second back sheet, the liquid-imperviousness in the solid gather can be secured, and when the solid gather is formed by the gather nonwoven fabric, the water absorbency can be increased by using a gather nonwoven fabric having any characteristics. It is possible to have it, to make the skin feel soft and so on.

  As described above in detail, according to the present invention, urine leakage to the outer can be prevented in the use mode for simple replacement, and urine can be smoothly transferred to the outer in the use mode for auxiliary absorption.

It is an expanded view which shows the use condition (mounting | wearing state to the outer 30) of the inner pad 1. FIG. It is an II-II arrow line view of FIG. It is a partially broken development view (use aspect for simple absorption) of inner pad 1 concerning the present invention. It is an IV-IV arrow line view of FIG. It is a V-V line arrow line view of FIG. It is a partially broken development view which shows the use aspect for auxiliary absorption. It is a reverse view of FIG. It is a VIII-VIII line arrow line view of FIG. The inner pad 1 which concerns on the other example of a form is shown, (A) is a top view, (B) is a BB arrow directional view of (A). It is a top view of the inner pad 1 which concerns on another embodiment. It is an XI-XI line arrow line view of FIG. It is sectional drawing of the inner pad 1 which concerns on another embodiment.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the present invention, “longitudinal direction” means a direction connecting the front side and the rear side of the inner pad 1, and “width direction” means a direction orthogonal to the longitudinal direction (horizontal direction at the time of development of the inner pad 1) Means

  The inner pad 1 according to the present invention, as shown in FIGS. 1 and 2, is used by being attached to the inner surface of an outer 30 such as a disposable diaper, an incontinence pant, a diaper cover, etc. It is known as a taking pad or an incontinence pad.

  The outer 30 (disposable diaper) is, as shown in FIG. 1 and FIG. 2, an absorbent body 33 made of cotton-like pulp or the like between a liquid-permeable top sheet 31 made of nonwoven fabric etc. and a back sheet 32. It consists of an intervening structure. More specifically, a liquid-permeable top sheet 31 made of a non-porous or non-porous non-woven fabric, a perforated plastic sheet, etc. covering the use side and a non-woven fabric covering the outer side of the diaper A back sheet 32 constituting a side flap portion together with the gather sheet 35, cotton-like pulp interposed between the liquid-permeable top sheet 31 and the back sheet 32, for example, an hourglass shape (or rectangular shape etc. And a waterproof film 34 made of polyethylene or the like disposed so as to cover at least the entire area of the absorbent 33 between the absorbent 33 and the back sheet 32; While forming the solid gathers 36 and 36 which stand on the skin side on both sides of the diaper, the back sheet 32 is formed on both sides of the diaper. From gather sheet 35. for constituting the side flap portion is mainly composed. The absorbent body 33 is preferably surrounded by an envelope sheet made of crepe paper, non-woven fabric or the like for shape retention and improvement of the diffusion of the body fluid having permeated the liquid-permeable top sheet 31.

  The inner pad 1 is made of cotton-like pulp or the like as shown in FIGS. 3 and 4 and has, for example, a rectangular shape with a certain degree of rigidity and, if necessary, a covering sheet made of crepe paper or nonwoven fabric. A liquid-permeable top sheet 3 comprising an enclosed absorbent body 2 and a perforated or non-porous nonwoven fabric or a perforated plastic sheet disposed so as to cover the skin side (surface side) of the absorbent body 2; A liquid-permeable first back sheet 4 made of a non-porous or non-porous non-woven fabric, a perforated plastic sheet or the like disposed so as to cover the non-skin side (rear surface side) of the absorbent 2; It is mainly composed of a liquid-impervious second back sheet 5 made of polyethylene or the like disposed so as to cover the non-skin side of the back sheet 4. In the periphery of the absorber 2, the top sheet 3 and the first back sheet 4 extending outward beyond the outer edge of the absorber 2 are adhesive such as hot melt, heat seal, ultrasonic seal, etc. The outer periphery flap part which is joined by a joining means and the absorber 2 does not exist is formed in outer periphery.

  The inner pad 1 has a product length ranging from the front area to the rear area of the outer 30, and can be disposed between the solid gathers 36, 36 of the outer 30, and has a smaller dimension width than the absorber 33 of the outer 30. It is formed of

  In the illustrated example, the absorbent body 2 is used in which the planar shape is formed into a substantially rectangular shape. The absorbent body 2 is preferably encapsulated by the encapsulating sheet in order to maintain its shape and to improve the diffusion of the body fluid having permeated through the top sheet 3.

  The liquid-permeable top sheet 3 covering the skin side (upper layer side) of the absorbent body 2 has a property of transmitting liquid, and for example, a porous or non-porous non-woven fabric or a porous plastic sheet is suitably used. Used. The raw material fiber which comprises a nonwoven fabric is not specifically limited. For example, 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., and mixed fibers of two or more of them, A composite fiber etc. can be illustrated, and using a nonwoven fabric obtained by an appropriate processing method such as spun lace method, spun bond method, thermal bond method, meltblown method, needle punch method, air through method, point bond method etc. it can. Among these processing methods, the spun lace method is excellent in flexibility and the spun bond method is superior in drapability, and the thermal bond method, point bond method and air through method are bulky and highly compressible (= soft). Is excellent. The top sheet 3 may be formed of one sheet or may be formed of a laminated sheet obtained by laminating two or more sheets. When a large number of through holes are formed in the liquid-permeable top sheet 3, urine and the like are quickly 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, composite fibers such as core-sheath fibers, side-by-side fibers, split fibers, etc., in which fibers having a high melting point are coreed and fibers having a low melting point are sheathed, can also be suitably used.

  The liquid-permeable first back sheet 4 covering the non-skin side (lower layer side) of the absorbent body 2 is, like the liquid-permeable top sheet 3, a porous or non-porous non-woven fabric, a porous plastic sheet, etc. Is preferably used.

  The second back sheet 5 covering the non-skin side (lower layer side) of the first back sheet 4 is not particularly limited, but, for example, the surface of a plastic film or nonwoven fabric made of an olefin resin such as polyethylene or polypropylene. For example, laminated non-woven fabric provided with a plastic film, and laminated sheet obtained by bonding non-woven fabric and the like to a plastic film in an overlapping manner, etc. can be exemplified. This water-impervious and moisture-permeable sheet is a microporous sheet obtained by, for example, melt-kneading an inorganic filler in an olefin resin such as polyethylene or polypropylene to form a sheet, and then stretching it in a uniaxial or biaxial direction. If the sheet thickness is the same, the rigidity is lower than that of the non-perforated sheet, which is superior in terms of flexibility. In addition, non-woven fabric using microdenier fibers, reinforcement of leakproofness by reducing the voids of the fibers by applying heat and pressure, and methods of coating highly water-absorbent resin or hydrophobic resin or water repellent agent Thus, it is possible to use a sheet which is liquid impermeable without using a plastic film.

  The pressure-sensitive adhesive layer 6 is formed on the non-skin side of the first back sheet 4 by an appropriate application pattern, and the second back sheet 5 is peelably attached to the pressure-sensitive adhesive layer 6. The pressure-sensitive adhesive layer 6 is attached to the second back sheet 5 in the use mode for simple replacement described later, and is adhered to the surface of the outer 30 in the use mode for auxiliary absorption, It prevents misalignment.

The range in which the pressure-sensitive adhesive layer 6 is formed is a range that does not impair the liquid permeation function of the first backsheet 4, and specifically, 50% or less of the area of the first backsheet 4, preferably 10 It is good to form by about -40%. The pressure-sensitive adhesive layer 6 is formed in a width of 2 to 30 mm along the longitudinal direction of the inner pad 1 and is disposed in a plurality of stripes substantially equally spaced in the width direction. The front and rear end portions each having a width of 2 to 30 mm along the width direction of the inner pad 1 are disposed one by one. The basis weight of the pressure-sensitive adhesive layer 6 is preferably 15 to 30 g / m ² .

  As the pressure-sensitive adhesive forming the pressure-sensitive adhesive layer 6, 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

The second back sheet 5 is coated or spray-coated with a release treatment liquid such as silicone resin, fluorine resin, or tetrafluoroethylene resin at least on the contact surface to the pressure-sensitive adhesive layer 6. It is preferable to use a release-treated plastic sheet or the like. The film may be a film itself or a non-woven fabric itself as long as it does not cause a substantial decrease in the adhesive force even if it is not specially subjected to the release treatment.

  Although not shown, the adhesive layer for anti-displacement in an appropriate pattern also on the outer surface (non-skin surface) of the second back sheet 5 in order to prevent anti-displacement with the outer 30 in the usage mode for simple replacement described later. The pressure-sensitive adhesive layer is releasably covered with a release material in an individually mounted state.

  In the inner pad 1, as shown in FIG. 4, the second back sheet 5 turns around the side edges of the top sheet 3 and the first back sheet 4 on both sides of the top sheet 3 and the first back sheet 4. The sheet material is disposed extending to the skin side of the top sheet 3 and is continuously provided from the second back sheet 5 extending to the skin side, so that the skin on both sides of the skin side is provided. Solid gathers BS, BS projecting to the side are formed. In the example shown in FIG. 4, the inward end of the second back sheet 5 extending to the skin side of the top sheet 3 is substantially double-folded, and both ends or in the longitudinal direction inside the double sheet. One or more, one in the illustrated example, one thread-like elastic stretchable member 7 fixed at an appropriate position, and the front and rear ends of the second back sheet 5 extending to the skin side of the top sheet 3 Parts are joined to the top sheet 3 by a simple detachable joining means 8 joined in a state where it can be easily removed by hand to the skin side surface (upper surface) of the top sheet 3 as shown in FIGS. 3 and 5 As a result, the longitudinal middle portion forms pockets P, P with openings facing inward with the side edge portion of the inner pad 1 as the rising base end, thereby forming solid gathers BS, BS standing on the skin side There is. By mounting on the outer 30 in a state where the solid gathers BS, BS are formed, double gathers can be provided together with the solid gathers 36, 36 of the outer 30, as shown in FIG.

  The height of the solid gather BS is preferably lower than that of the outer tape or the solid gather of the pants when attached, and in particular, in the natural state of the inner pad 1, the top sheet against the vertical line on the surface of the top sheet 3. It is desirable that the height of the solid gather BS defined by the length from the surface of 3 to the tip of the solid gather BS be 10 to 40 mm. In addition, the tension of the thread-like elastic stretchable member 7 is preferably 100 to 300% (the elongation rate from this state is 2 to 4 times from the natural state as 0%).

  In the present inner pad 1 configured as described above, as shown in FIGS. 3 and 4, it is mounted on the inner surface of the outer 30 in a state where the non-skin side is covered with the second backsheet 5 impermeable to liquid. As shown in FIG. 6 to FIG. 8 and the usage mode for easy replacement to be used, the second back sheet 5 is removed and the solid gather BS is also removed, and the non-skin side of the first back sheet 4 is removed. With the formed pressure-sensitive adhesive layer 6 exposed, it is possible to select a mode of use for auxiliary absorption in which the pressure-sensitive adhesive layer 6 is attached to the inner surface of the outer 30 and used.

  In the use mode for the simple replacement, since the urine is blocked by the solid gather BS, it is possible to reliably prevent the urine leakage from the both sides to the outer 30. Further, the non-skin side of the inner pad 1 is completely covered by the liquid-impervious second back sheet 5, and the second back sheet 5 is the top sheet 3 on both sides of the top sheet 3 and the first back sheet 4. Since the first back sheet 4 is disposed so as to extend around the side edges of the first back sheet 4 and extend to the skin side of the top sheet 3, there is no leakage of urine from the non-skin side and both side edges. Leaching can be prevented. Therefore, the outer 30 can be used repeatedly only by replacing the inner pad 1 because the outer 30 need not be soiled.

  In the use mode for auxiliary absorption, when removing the second back sheet 5 including the solid gather BS, the front and rear end portions of the second back sheet 5 extended to the skin side of the top sheet 3 are the above Since the second back sheet 5 peelably covers the pressure-sensitive adhesive layer 6 while being bonded to the top sheet 3 by the simple detachable type bonding means 8, the second back sheet 5 can be easily removed. Since the second liquid-impervious back sheet is completely removed, the entire surface on the non-skin side is covered only by the first liquid-permeable first back sheet 4, and the urine is smoothly transferred to the outer 30, It is possible to effectively utilize the absorption performances of the respective absorbents included in the inner pad 1 and the outer 30.

  Furthermore, in the present inner pad 1, since the opening and the like are not formed in the second back sheet 5, there is no need to separately provide a sheet material for closing the opening, and it is possible to suppress increases in material cost and manufacturing cost. Become.

  The structure of the inner pad 1 will be described in further detail. Although the simple removable type joining means 8 is not displaced or detached due to the movement of the body during wearing with respect to the top sheet 3, it is used for auxiliary absorption. When used, it has a bonding strength that can be easily removed by hand to remove the second back sheet 5, for example, mechanical bonding means (fastening tape) provided with hook elements, or by hand It is possible to use a pressure-sensitive adhesive bonding means that has such an adhesive strength that it can be peeled off and that almost no adhesive power remains on the top sheet 3 side after peeling.

  The simple detachable type joining means 8 is provided only at the front and rear end portions of the second back sheet 5 extended to the skin side in the example shown in FIG. 3, but as shown in FIG. Within a range that does not impair the standing of the gathers BS, it may be provided along the longitudinal direction in the region from the side edge position of the absorber 2 in the longitudinal direction intermediate portion to the side edge of the top sheet 3. In this case, the solid gather BS projects toward the skin side with the side edge position of the absorber 2 as the standing proximal end.

  Further, as another embodiment of the inner pad 1, as shown in FIGS. 10 and 11, the top sheet 3 and the first back sheet 4 which extend laterally beyond the side edge of the absorber 2 As a result, side flaps 9, 9 in which the absorbent body 2 is not present are formed, and one or more, in the illustrated example, two thread-like elasticity along the longitudinal direction at the longitudinal middle of this side flap 9. The stretchable members 10, 10 can be disposed to form the flat gathers HS, HS. By forming the flat gathers HS on the side flaps 9 in this way, the fit around the legs becomes good and leakage can be prevented, and the flat gathers HS is a laminated portion of the top sheet 3 and the first back sheet 4 Use in the state where the side flap portion 9 is covered by the second back sheet 5, and a mode for use as a simple replacement, and for auxiliary absorption used in the state where the second back sheet 5 is removed In any of the modes of use, the function as the flat gather HS can be exhibited. The inner pad 1 on which the flat gathers HS are formed is attached to an outer not provided with such solid gathers rather than the outer 30 on which the solid gathers 36 are formed as shown in FIG. It is valid.

  The flat gathers HS are formed in the longitudinal middle portion of the inner pad 1, particularly in the longitudinal range where the solid gathers BS are formed, that is, between the simple detachable joining means 8, 8 provided at the front and rear ends. Is preferred. This makes it easier for the flat gather HS to fit around the crotch leg.

  The second back sheet 5 may be joined to both or any one of the top sheet 3 and the first back sheet 4 by means similar to the simple detachable joining means 8 in the flat gather HS. , You do not have to join. In any case, it is preferable not to join because the function as a gather is easy to exhibit.

  As shown in FIG. 7, the pressure-sensitive adhesive layer 6 is applied in a range that does not impair the liquid permeation function of the first back sheet 4. Specifically, the area of the first back sheet 4 may be 50% or less, preferably about 10% to 40%.

  The pressure-sensitive adhesive layer 6 is preferably formed to have a peripheral pressure-sensitive adhesive layer 6A continuous along substantially the periphery of the absorber 2. By providing the peripheral pressure-sensitive adhesive layer 6A, it is possible to prevent urine from being diffused between the first back sheet 4 and the second back sheet 5 and leaking to the outside in the use mode for easy replacement. . In the example shown in FIG. 7, pressure-sensitive adhesive layers 6 and 6 are provided at the front and rear end portions along the width direction, and the front and rear end portions are connected to these pressure-sensitive adhesive layers 6 and 6 along the longitudinal direction 5 The adhesive layers 6, 6... Of the book are arranged at substantially equal intervals in the width direction. When the flat gathers HS are formed on the side flaps 9, the adhesive layers 6, 6 ... along the longitudinal direction are disposed on the main body portion in which the absorber 2 is interposed so as not to impair the function of the flat gathers, It is preferable not to arrange in the flap part 9. On the other hand, the adhesive layers 6, 6 along the width direction of the front and rear end portions are preferably arranged continuously to the left and right end edges in order to prevent the front and rear end portions of the side flaps 9 from turning up.

  The solid gather BS can be formed by the second back sheet 5 extended to the skin side as shown in FIG. 4 as described above, and extends to the skin side as shown in FIG. A separate gather non-woven fabric 11 can be joined to the end portion of the second back sheet 5 that has been made to be formed by this gather non-woven fabric 11. When the solid gather BS is formed by the second back sheet 5, the liquid impermeability in the solid gather BS can be secured, and when it is formed by the separate gather non-woven fabric 11, the gather having the optional characteristics By using the non-woven fabric 11, it is possible to have water absorbency, to make the skin contact flexible, and the like. Further, although not shown, after the second back sheet 5 is extended to the tip of the solid gather BS, both the skin contact surface and the non-skin contact surface of the second back seat 5 or the skin in the solid gather BS portion Nonwoven fabrics may be bonded in a laminated state only to the contact surface for the purpose of improving skin contact and the like.

  DESCRIPTION OF SYMBOLS 1 ... Inner pad, 2 ... Absorber, 3 ... Top sheet, 4 ... 1st back sheet, 5 ... 2nd back sheet, 6 ... Adhesive layer, 7 ... Filament elastic elastic member, 8 ... Simple removable joint means, 30: Outer, BS: solid gather, HS: flat gather

Claims (3)

An absorbent body, a liquid-permeable top sheet covering the skin side of the absorbent body, a liquid-permeable first back sheet covering the non-skin side of the absorbent body, and the non-skin side of the first back sheet And a second back sheet impervious,
An adhesive layer is formed on the non-skin side of the first back sheet, and the second back sheet is peelably attached to the adhesive layer, and in both side portions of the top sheet and the first back sheet The second back sheet is disposed so as to extend around both side edges of the top sheet and the first back sheet to the skin side of the top sheet, and the second back sheet extending to the skin side The sheet material continuously provided from the sheet forms a solid gather projecting to the skin side on both sides of the skin side, and the sheet material forming the solid gather has at least both ends in the longitudinal direction of the top sheet. Removably joined to the skin side,
A mode of use as a simple replacement, wherein the non-skin side is covered with the second back sheet and the solid gather is formed on both sides of the skin side, and the inner surface is mounted on the outer surface of the outer and used With the backsheet removed and the solid gather removed, the pressure sensitive adhesive layer is adhered to the inner surface of the outer in a state where the pressure sensitive adhesive layer is exposed, and the use mode for auxiliary absorption can be selected. absorbent article characterized in that it it. A side flap portion without the absorber is formed by the top sheet and the first back sheet which extend laterally beyond the side edge portion of the absorber, and a longitudinal middle of the side flap portion the absorbent article of claim 1 Symbol placement plane gathers were provided with resilient and elastic members in the longitudinal direction are formed in parts. The absorbent article according to any one of claims 1 and 2 , wherein the solid gathers are formed by the second back sheet or by a gather non-woven fabric joined to an end of the second back sheet.

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