JP2009268687A - Absorbent article - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an absorbent article which prevents twisting and liquid leakage by being attached stably to various underclothes with various crotch widths. <P>SOLUTION: The absorbent article 1 comprises a longitudinal absorbent unit 5 having a front sheet 2 forming a skin abutting face, a rear sheet 3 forming a non-skin abutting face and an absorbent body 4 interposed between the sheets 2 and 3, and a pair of side flaps 6 and 6 that are arranged on the both longitudinal sides of the absorbent unit 5. A first adhesion part 7 for attaching the absorbent unit 5 to clothing is arranged on a region of non-skin abutting surface side of the rear sheet 3 where the absorbent body 4 is arranged. Both side edges 6a and 6a of the pair of side flaps 6 and 6 extend longitudinally along the absorbent unit 5 and are straight and parallel with each other. Each of the pair of side flaps 6 and 6 has a front part 6A, a center part 6B and a rear part 6C in the longitudinal direction of the absorbent unit 5, and a second adhesion part 8 for attaching the side flap 6 to the clothing is arranged on the non-skin abutting surface side of the center part 6B. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an absorbent article such as a sanitary napkin that is used while being fixed to a crotch part of underwear.

  Conventionally, a sanitary napkin is known in which flaps (side flaps) are extended on both side edges in the longitudinal direction of an absorbent main body having liquid absorbency. In use, the napkin having such a structure has a skin contact surface of the crotch part (crotch portion) of the underwear with the absorbent body interposed through an adhesive portion disposed on the non-skin contact surface side of the absorbent body. And the extension portion of the flap from the edge of the crotch portion is folded back to the non-skin contact surface side of the crotch portion, and the adhesive portion is disposed on the extension portion. And fixed to the crotch portion. The main purpose of the flap is to stably fix the napkin to the underwear and to prevent contamination of the underwear by the liquid when the liquid leaks from the napkin.

  As a sanitary napkin having a flap, Patent Document 1 has a main body portion and a pair of flaps, and a central pad adhesive is disposed on the non-skin contact surface side of the main body portion. A sanitary napkin is described in which the portion further extends outward in the width direction of the napkin to form a second flap portion (see particularly the description of FIGS. 1 and 2 of Patent Document 1). In the second flap portion, a flap adhesive is disposed on the same side as the central pad adhesive. The second flap portion is appropriately foldable, whereby the napkin described in Patent Document 1 is used in a state where the folded second flap portion is pulled out and wound around the edge of the crotch portion of the underwear. In addition, the second flap portion can be used in a state of being folded on the absorbent main body without being wrapped around the edge portion.

  Further, Patent Document 2 has a main body portion and a pair of flaps, and a central attachment means is arranged on the non-skin contact surface side of the main body portion, and the flap is used when the side edge of the crotch portion of the underwear is used. The first flap that is folded and fixed along with the second flap that is not folded during use and is fixed to the skin contact surface side of the crotch portion is connected in the longitudinal direction via the connecting portion. A sanitary napkin in which stretchability is imparted to the connecting portion is described. Each of the first flap and the second flap is provided with a flap adhesive layer on the same side as the central attachment means.

Japanese National Patent Publication No. 8-504640 JP-A-10-71171

  In recent years, the form of underwear has been diversified, and the width of the crotch portion (crotch width) varies from narrow to wide. The conventional sanitary napkins as described in Patent Documents 1 and 2 cannot sufficiently cope with such diversification of the crotch width. Therefore, depending on the underwear worn, the napkin may distort and cause liquid leakage. was there. Specifically, for example, the sanitary napkin described in Patent Document 1 has a second flap part that can be pulled out arbitrarily, so that the second flap part is pulled out for an underwear with a narrow crotch width. It seems that this is supported by using it in a folded state on the absorbent main body, but when used in such a state, the second flap portion in a folded state during use is It will be stretched by the movement of the user, etc., and sufficient fixing force to the underwear will not be developed, which may cause leakage. Moreover, the sanitary napkin described in Patent Document 2 is an underwear napkin with a wide crotch width, and for underwear with a narrow crotch width, interference between the adhesive at the folded portion and the adhesive at the absorbent main body. Due to the unpleasantness and operability of the product, and, as in the case of using a conventional sanitary napkin attached to a wide crotch undergarment, the adhesive force of the napkin to the crotch part becomes insufficient, and these undesirable phenomena If the napkin is twisted, it will lead to liquid leakage. No sanitary napkin for various underwear with different crotch widths has yet been provided.

  Accordingly, an object of the present invention is to provide an absorbent article that can be stably fixed to various underwear having different crotch widths and is less likely to cause twisting or liquid leakage.

  The present invention comprises a longitudinally absorbent body comprising a top sheet on the skin contact surface side, a back sheet on the non-skin contact surface side and an absorber disposed between both sheets, and the longitudinal direction of the absorbent body An absorbent article having a pair of side flap portions functioning as side flaps on both sides, wherein the absorbent main body is fixed to clothing in a region where the absorbent body is disposed on the non-skin contact surface side of the back sheet. 1 adhesive part is arranged, the both-sides edge along the longitudinal direction of the absorptive main part in a pair of said side flap parts is made into the shape of a parallel mutually parallel, and each of a pair of said side flap parts is said absorption A second adhesive portion that has a front portion, a central portion, and a rear portion in the longitudinal direction of the sex main body, and that folds the side flap portion and fixes the side flap portion to the clothing on the non-skin contact surface side of the central portion is disposed. Provide absorbent articles The Rukoto, those who achieved the target.

  The absorbent article of the present invention can be stably fixed to various underwear having different crotch widths, and hardly causes twisting or liquid leakage.

  Hereinafter, the absorbent article of this invention is demonstrated with reference to drawings based on the sanitary napkin which is one preferable embodiment. The top view which looked at the sanitary napkin of 1st Embodiment of this invention from the back surface sheet side is shown by FIG.

  As shown in FIG. 1, the napkin 1 according to the first embodiment includes a top sheet 2 positioned on the skin contact surface side, a back sheet 3 positioned on the non-skin contact surface side, and between the two sheets 2 and 3. It has a vertically long absorbent main body 5 having an absorbent body 4 disposed, and has a pair of side flap portions 6 and 6 that function as side flaps on both sides in the longitudinal direction of the absorbent main body 5. A side flap is a part which functions as a fixing means which is located in the side part along the longitudinal direction of a vertically long napkin, and mainly fixes this napkin to clothes, such as shorts and underwear. As shown in FIG. 1, the napkin 1 has a vertically long rectangular shape with rounded corners in plan view. The absorber 4 is located at a substantially central portion of the napkin 1.

  The top sheet 2 and the back sheet 3 have extending portions that extend outward in the width direction from the respective side edges 4 a and 4 a in the longitudinal direction of the absorbent body 4. More specifically, the top sheet 2 and the back sheet 3 extend outward from the outer peripheral edge of the absorber 4, and the outer periphery (rectangular shape) of the napkin 1 is formed by the outer peripheral edges of the both sheets 2 and 3 that are extended. It is. The extended sheets 2 and 3 are bonded and fixed to each other by bonding means such as an adhesive or heat seal. The pair of side flap portions 6 and 6 are substantially composed only of the extending portions of both the sheets 2 and 3.

  In this specification, the “longitudinal direction” is a direction along the long sides of various members such as an absorbent article or an absorbent main body (vertical direction in FIG. 1), and the “width direction” is orthogonal to the longitudinal direction. Direction (left-right direction in FIG. 1). In addition, the “skin contact surface” is a surface directed to the wearer's skin side when wearing the absorbent article in various members such as the absorbent article or the absorbent main body, and the “non-skin contact surface” is the absorption It is a surface directed to the underwear side (the side opposite to the wearer's skin side) when wearing the absorbent article in various members such as the absorbent article or the absorbent main body.

  The absorbent body 4 has a vertically long shape in plan view, and in the excretory part facing part that faces the excretion part of the wearer of the napkin 1, both side edges 4a and 4a in the longitudinal direction are bound to the inner side in the width direction. Constricted portions 4b and 4b are provided. The excretory part facing part is a central part when the napkin 1 is divided into three regions so that the napkin 1 is divided into approximately three equal parts in the longitudinal direction in a state where the napkin 1 is spread in a plane as shown in FIG. This is a region where a central portion 6B of a side flap portion 6 to be described later exists. Thus, the napkin 1 has a rectangular shape in plan view (both side edges in the longitudinal direction of the napkin 1 are linear along the longitudinal direction), and both side edges 4a in the longitudinal direction of the absorbent body 4a, 4a has the constricted portions 4b and 4b constricted on the inner side in the width direction, so that the portion where the constricted portion 4b is located in the side flap portion 6 (central portion 6B) is wider than the other portions. Functions as a side flap.

  The absorbent main body 5 is fixed to clothes such as underwear on the non-skin contact surface side of the back sheet 3, that is, in the arrangement area of the absorbent body 4 (area facing the absorbent body 4) on the outer surface of the back sheet 3. One adhesive portion 7 is arranged. The 1st adhesion part 7 is formed by apply | coating a hot-melt-adhesive, has a vertically long shape in planar view, and the center part of the longitudinal direction is bundled inward as a whole. The first adhesive portion 7 is disposed at a substantially central portion of the absorbent main body 5 with its longitudinal direction coinciding with the longitudinal direction of the absorbent main body 5.

  It is preferable that the 1st adhesion part 7 exists in the arrangement | positioning area | region of the absorber 4. FIG. When the 1st adhesion part 7 exists over the arrangement field of absorber 4, for example, when the 1st adhesion part 7 exists across the longitudinal direction front end and / or back end of absorber 4, When the napkin 1 is manufactured, application failure of the hot melt adhesive which is a material for forming the first adhesive portion 7 occurs, and due to this application failure, the napkin is fixed to the shorts and used after being detached from the shorts. In addition, the hot melt adhesive may remain in the shorts. The length in the longitudinal direction of the first adhesive portion 7 is preferably 70 to 95% with respect to the length in the longitudinal direction of the absorbent body 4 (the total length in the longitudinal direction of the absorbent body 4). The length in the width direction is preferably 60 to 85% with respect to the length in the width direction of the absorber 4 (the maximum width of the portion having the maximum width if the length in the width direction of the absorber 4 is not constant). It is. Moreover, the length of the longitudinal direction of the absorber 4 is 135-220 mm normally, and the length of the width direction is 45-85 mm.

  The side edges 6a and 6a along the longitudinal direction of the absorbent main body 5 in the pair of side flap portions 6 and 6 are linearly parallel to each other, and a part of the side edges 6a and 6a are internal as in the longitudinal side edges of the absorbent body 4. It is not bound to one side (see FIG. 1), or a part of the wing part in a normal napkin with a wing part does not protrude outward. Each of the pair of side flap portions 6, 6 has a front portion 6 </ b> A, a center portion 6 </ b> B, and a rear portion 6 </ b> C in the longitudinal direction of the absorbent main body 5. The front part 6A is a part arranged near the wearer's abdomen at the time of wearing the napkin, the central part 6B is a part arranged opposite to the wearer's excretion part, and the rear part 6C is the wearer's excretion part. It is a part arranged at the position near the back. The front portion 6A, the central portion 6B, and the rear portion 6C in the first embodiment are arranged so that the side flap portion 6 is divided into approximately three equal parts in the longitudinal direction in a state where the napkin 1 is flattened as shown in FIG. Each area is divided into two areas.

  The second side of the side flap portions 6 and 6 is fixed to the non-skin contact surface side of the center portion 6B, that is, the outer surface of the back sheet 3 of the center portion 6B. An adhesive portion 8 is disposed. Similar to the first adhesive portion 7, the second adhesive portion 8 is formed by applying a hot melt adhesive. Thus, in addition to the 1st adhesion part 7 distribute | arranged to the non-skin-contacting surface side of the absorptive main body 5, the napkin 1 of 1st Embodiment is arrange | positioned as an adhesion part for fixing this napkin 1 to clothes. The second adhesive portion 8 disposed in the longitudinal center portion 6B of the side flap portion 6 can be stably fixed to various underwear having different crotch widths, and extended. Can effectively prevent twisting and leakage. That is, for example, when the napkin 1 is fixed to the crotch portion (crotch portion) 50 of the underwear whose crotch width is narrower than the width of the napkin 1, as shown in FIGS. 1 While fixing the absorbent main body 5 via the adhesive portion 7, the pair of side flap portions 6, 6 protruding from the edge of the crotch portion 50 are folded back to the outer surface side of the crotch portion 50 along the edge portion. Further, the napkin 1 is stably fixed to the crotch portion 50 by being fixed to the outer surface via the second adhesive portion 8. Further, when the napkin 1 is fixed to the crotch portion of the underwear having the crotch width equal to or wider than the width of the napkin 1, the side flap portions 6 and 6 are not folded as shown in FIGS. 1, the napkin 1 is stably attached to the crotch portion by fixing the first adhesive portion 7 and the second adhesive portions 8 and 8 to the inner surface of the crotch portion in a state where the napkin 1 is spread in a flat shape. Stick. In any case, since the napkin 1 is firmly fixed to the crotch portion, twisting and liquid leakage are unlikely to occur.

  The second adhesive portion 8 in the first embodiment has a vertically long rectangular shape in plan view, and the longitudinal direction of the side flap portion 6 is matched with the longitudinal direction of the absorbent main body 5. It is arranged in the part 6B. The second adhesive portion 8 is arranged in a region within 5 to 10 mm from the side edge 6a of the side flap portion 6, and particularly when the crotch width is fixed to shorts narrower than the width of the napkin, the side surface of the crotch portion This is preferable in terms of ease of operability of folding back to the side. The length in the longitudinal direction of the second adhesive portion 8 is preferably 20 to 45% with respect to the length in the longitudinal direction of the absorbent body 4 (the total length in the longitudinal direction of the absorbent body 4). The length in the width direction is preferably 4 to 10% with respect to the length in the width direction of the absorber 4 (the maximum width of the portion having the maximum width when the length in the width direction of the absorber 4 is not constant). It is.

  In the napkin 1 of the first embodiment, a part of each of the front part 6A and the rear part 6C of each of the pair of side flap portions 6 and 6 has extensibility in the longitudinal direction of the absorbent main body 5. More specifically, a plurality (three in FIG. 1) that extend in the width direction of the absorbent main body 5 and are arranged in parallel in the longitudinal direction of the absorbent main body 5 are respectively provided on the front portion 6A and the rear portion 6C of each side flap portion 6. The slit 9 of this book is formed, and the extension property to the longitudinal direction of the absorptive main body 5 is provided to the formation area (the vicinity including the slit 9) of the slit 9 by this. The slit 9 is a cut (slit) penetrating the napkin 1 in the thickness direction. If the slit 9 extends in the width direction of the absorbent main body 5, the width of the slit 9 increases when the side flap portion 6 is extended in the longitudinal direction of the absorbent main body 5 perpendicular to the width direction. The entire formation region of the film is extended in the longitudinal direction.

  In this way, at least a part of each of the front part 6A and the rear part 6C located before and after the second adhesive part 8 is extensible in the longitudinal direction of the absorbent main body 5, whereby the side flap part 6. It becomes easy to bend over the whole of the longitudinal direction. As a result, when the napkin 1 is fixed to the crotch portion of the underwear whose crotch width is narrower than the width of the napkin 1, the napkin 1 is arranged along the inner surface of the crotch portion so that the skin abuts in the longitudinal direction. Even in a state of being curved in a concave shape on the surface side, the side flap portion 6 can be folded back to the outer surface side of the crotch portion cleanly over the entire length as shown in FIG. In addition, the stability of fixing to the crotch portion is further enhanced, and the fit to the body on both sides of the napkin 1 located on the inner surface side of the edge region of the crotch portion is enhanced.

  On the other hand, when the front part 6A and the rear part 6B have no extensibility in the longitudinal direction of the absorbent main body 5, the napkin 1 is curved in a concave shape on the skin contact surface side in the longitudinal direction. When the side flap part 6 is folded back to the outer surface side of the crotch part, the side flap part 6 is generated at the boundary between the center part 6B of the side flap part 6 and the front part 6A and the rear part 6C or in the vicinity thereof. Due to the distortion caused by the folding, it becomes difficult to fold the side flap portion 6 cleanly over the entire length thereof, so that the fixing stability of the napkin 1 to the crotch portion is lowered and a good fit cannot be obtained. There is a fear. Further, when the front part 6A and the rear part 6C are extensible in the width direction of the absorbent main body 5, the side flaps are bent in a concave shape toward the skin contact surface side in the longitudinal direction. When the part 6 is folded back to the outer surface side of the crotch part and the shorts are pulled up to the body, the boundary between the central part 6B of the side flap part 6 and each of the front part 6A and the rear part 6C and the vicinity thereof are arranged in the longitudinal direction of the napkin. Since a pulling force is generated, the side flap portion 6 is folded back neatly along the entire length direction due to the distortion caused by the folding of the side flap portion 6 as in the case where there is no extensibility in the longitudinal direction. Is difficult, the stability of fixing of the napkin 1 to the crotch portion is lowered, and there is a possibility that good fit is not obtained. As described above, providing the front portion 6A and the rear portion 6C with extensibility in the longitudinal direction is effective in relieving the distortion caused by the bending of the side flap portion 6 as described above.

  In the first embodiment, since the shape of the absorber 4 in plan view is an hourglass shape having a constricted portion at the center in the longitudinal direction thereof, in particular, the maximum width of the absorber 4 positioned before and after the constricted portion. Distortion due to the bending of the side flap portion 6 described above is likely to occur in the portion (the portion that protrudes most outward in the width direction in the absorber 4) and in the vicinity thereof. Therefore, when imparting extensibility to a part of the front portion 6A and the rear portion 6C, the side flap portion 6 in the region where such distortion is likely to occur (the outermost portion of the absorbent body 4 in the longitudinal direction of the absorbent main body 5). It is preferable to impart extensibility by, for example, forming a slit 9 in the side flap portion 6) located at the same position as the large portion and the vicinity thereof.

  In addition, the distortion resulting from the bending of the side flap part 6 mentioned above is, for example, 1) on the skin contact surface side (surface sheet 2 side) of the napkin 1 in addition to the case where the absorber 4 has an hourglass shape. In the case where the sheet 2 and the absorbent body 4 are integrally formed by pressure bonding and a groove extending in the width direction of the napkin 1 is formed, or 2) the thickness of the central portion in the longitudinal direction of the absorbent body 4 is set to other than the absorbent body 4 This is also likely to occur when the middle and high portions are formed by projecting the central portion in the longitudinal direction of the napkin 1 to the skin contact surface side, for example, by making it larger than the thickness of this portion. In particular, in 1), the distortion is likely to occur along the groove, and in 2), the distortion is likely to occur at the front and rear end portions in the longitudinal direction of the napkin in the middle and high portions and in the vicinity thereof. Therefore, in the case of 1), in the case of imparting extensibility to a part of the front part 6A and the rear part 6C, in the longitudinal direction of the absorbent main body 5, the side flap part located at the same position as the groove and the vicinity thereof. 6 and in the case of 2), by applying slits 9 to the side flap portions 6 located at the same positions as the front and rear end portions of the middle and high portions and the vicinity thereof in the longitudinal direction of the absorbent main body 5, It is preferable to impart extensibility.

  In the state where the napkin 1 is spread in a plane as shown in FIG. 1, the length of each slit 9 along the width direction of the absorbent main body 5 (the length of the slit) is the length of the side flap portion 6 in the width direction. It is preferably 5 to 20%, more preferably 10 to 15% with respect to the height (the maximum width of the portion having the maximum width when the length in the width direction of the side flap portion 6 is not constant). Moreover, in the said state, the space | interval of the adjacent slits 9 and 9 becomes like this. Preferably it is 60-90 mm, More preferably, it is 70-80 mm. Further, the number of slits 9 in each of the front part A and the rear part C is not particularly limited, but is preferably 5 to 15. The length of the slit 9 is preferably 10 to 30 mm, and the width of the slit 9 (the length along the longitudinal direction of the absorbent main body 5 in the slit 9) is preferably 5 to 15 mm.

  When imparting extensibility to each of the front portion 6A and the rear portion 6C of the side flap portion 6, it is preferable that the extensibility is not too high, that is, low extensibility is imparted without imparting high extensibility. If high extensibility is imparted to the front part 6A and the rear part 6C, when the napkin 1 is worn, the center part 6B of the side flap part 6 is picked and folded along the edge of the crotch part. It becomes difficult to be transmitted to the whole part 6. As a result, the distortion caused by the folding is difficult to be alleviated, and there is a possibility that it is difficult to fold the side flap portion 6 to the outer surface side of the crotch portion cleanly over the entire longitudinal direction.

  As described above, it is preferable to impart low extensibility to each of the front part 6A and the rear part 6C. Specifically, the elongation rate of each of the front part 6A and the rear part 6C according to the following measurement method is 10% or less. It is preferable that That is, when measuring the extension rate of the front portion 6A, as shown in FIG. 1, in the case where a slit is formed in the front portion 6A, in the state where the napkin is flattened as shown in FIG. The length α along the longitudinal direction of the slit forming region, that is, the distance α between the slit closest to one end in the longitudinal direction of the napkin and the slit closest to the other end in the longitudinal direction is measured with a ruler. Further, in the state where the side flap portion of the napkin is folded back to the outer surface side of the crotch portion of the underwear and the napkin is fixed to the underwear, the length β along the longitudinal direction of the napkin in the slit forming region (the napkin in the fixed state) The distance β) between the slit closest to one end in the longitudinal direction and the slit closest to the other end in the longitudinal direction is measured with a ruler. From the lengths α and β thus obtained, the extension rate (%) of the front portion is calculated by the following equation. Elongation rate = {(β−α) / α} × 100 The elongation rate of the rear portion 6C in which the slit is formed can also be obtained by the same procedure as described above.

  Moreover, when the slit is not formed in 6 A of front parts, the expansion | extension rate of this 6 A of front parts is calculated | required as follows. The absorbent main body 5 is fixed to the inner surface of a crotch portion of a general underwear (the width of the narrowest portion of the crotch portion is about 50 to 70 mm) as shown in FIG. 2, and is folded back to the outer surface side of the crotch portion. And a portion that is not folded is determined. The region extending from the front end in the napkin longitudinal direction to the inner side of the napkin by 30 mm inward in the portion folded back to the outer surface side of the crotch portion is defined as the front portion A, and the length of the folded front portion A in the napkin longitudinal direction Is measured, and the elongation percentage (%) of the length is calculated. The elongation rate of the rear portion 6C where no slit is formed can also be obtained by the same procedure as described above. The rear portion 6C where no slit is formed is a region extending from the rear end in the napkin longitudinal direction to the inner side of 30 mm along the napkin longitudinal direction at the portion folded back to the outer surface side of the crotch portion.

  As a method of imparting extensibility to each of the front part 6A and the rear part 6C, a method other than the method of providing the slits as described above can be adopted. For example, a method of imparting an uneven shape to the constituent material through a constituent material of the side flap portion between hot rolls having an uneven surface on the roll surface, or a method of using an elastic material as a constituent material of the side flap portion can be adopted. . As the elastic material, elastic yarns and elastic films that are usually used in absorbent articles can be used without particular limitation.

  Next, constituent materials of the napkin 1 according to the first embodiment will be described. As the top sheet 2, the back sheet 3, and the absorbent body 4, those used in this type of conventional absorbent article can be used without particular limitation. As the surface sheet 2, for example, liquid permeable sheets such as various nonwoven fabrics and perforated films subjected to a hydrophilic treatment can be used. As the back sheet 3, for example, a liquid-impermeable or water-repellent sheet such as a thermoplastic resin film (polyethylene film or the like) or a laminate of the film and a nonwoven fabric can be used, and has water vapor permeability. Can also be used. As the absorbent body 4, for example, a laminated layer obtained by depositing pulp fibers, or a nonwoven fabric made from pulp fibers can be used. The absorber 4 may contain superabsorbent hydrogel particles. Moreover, the absorber 4 may be entirely covered with a sheet material such as paper such as tissue paper or various nonwoven fabrics.

  As described above, the top sheet 2 and the back sheet 3 are extended from the side edge 4a of the absorbent body 4 to form a side flap part, and both sheets 2 and 3 are fixed at the side flap part. For fixing both sheets 2 and 3, means such as an adhesive, thermal fixing by a heat sealing method, ultrasonic sealing method and the like can be used alone or in combination. In particular, when an adhesive is used, the adhesive application portion is shaped along the longitudinal direction of the absorbent body 4 and the adhesive application amount is partially varied, so that the adhesive strength is partially increased or decreased. It is preferable to apply an adhesive with a mark, and when the heat seal method is used, it is preferable to cause the back sheet 3 to be slightly contracted when the sheets 2 and 3 are joined. When these fixing methods are used, the side flap portion can be more easily bent on the outer surface side of the undergarment. The effect of making the side flap portion easier to bend is more easily developed as the fixing portion of the sheets 2 and 3 is separated from the side edge 4a of the absorbent body 4. Moreover, even if it is fixation between both sheets by the same conditions, in the excretion area | region (longitudinal direction center area | region) which formed the constriction in the absorber 4 as shown in FIG. 1, the effect which makes a side flap site | part easy to bend | fold expresses, It is possible to adopt a configuration in which the effect does not appear in the longitudinal front and rear regions.

  The napkin of 2nd Embodiment of the absorbent article of this invention is shown by FIG. About 2nd Embodiment, the different structure part from the napkin 1 of 1st Embodiment mentioned above is mainly demonstrated, the same structure part attaches | subjects the same code | symbol, and abbreviate | omits description. The description about the napkin 1 of 1st Embodiment is applied suitably to the component which is not demonstrated especially.

  The napkin 1 according to the second embodiment has a vertically long rectangular shape in plan view, and the top sheet 2 and the back sheet 3 are outward in the width direction from the respective side edges 4a and 4a in the longitudinal direction of the absorbent body 4. The side flap portions 6 and 6 are formed from the extended portions of both the sheets 2 and 3. Further, the absorbent body 4 includes constricted portions 4b and 4b in which both side edges 4a and 4a in the longitudinal direction are constricted inward in the width direction in the excretory portion facing portion (central portion 6B) facing the excretion portion of the wearer of the napkin 1. Have. The above-described configuration of the second embodiment is the same as that of the first embodiment.

  In 2nd Embodiment, between the surface sheet 2 and the back surface sheet 3 which comprise a pair of side flap site | parts 6, 6, at least the both-sides edge of the constricted parts 4b and 4b (the absorber 4 located in the excretion part opposing part) The adhesive application section 10 is disposed along both side edges 4a and 4a in the longitudinal direction of the absorbent body 4 including both side edges). The adhesive application part 10 is formed by applying a hot melt adhesive or the like which is a material for forming the first adhesive part 7 or the second adhesive part 8. In 2nd Embodiment shown in FIG. 4, the linear form extended in the longitudinal direction of the absorptive main body 5 in each of the front part 6A of the side flap part 6, the center part 6B (part in which the narrow part 4b is located), and the rear part 6C. The adhesive application part 10 is arranged. The adhesive application portions 10 of the front portion 6A, the central portion 6B, and the rear portion 6C are not connected to each other and are discontinuously arranged. Moreover, the adhesive application part 10 distribute | arranged to the center part 6B has the length of the longitudinal direction longer than the adhesive application part 10 distribute | arranged to the other site | part. When the side flap portion 6 is folded back to the outer surface side of the crotch portion when the napkin 1 is worn, the side edge 4a of the absorbent body 4 is the starting point of the folding in the napkin 1 of the first embodiment described above. In the form, the pressure-sensitive adhesive application portion 10 acts as a starting point for folding. According to the second embodiment, the same effect as that of the first embodiment can be obtained.

  The absorbent article of the present invention is not limited to the above embodiment, and can be variously modified without departing from the spirit of the present invention. For example, in the said embodiment, although the 1st adhesion part 7 and the 2nd adhesion part 8 were all formed by apply | coating an adhesive continuously, they were formed by apply | coating an adhesive discontinuously. Also good. Further, the napkin 1 may be provided with a groove formed by integrating the topsheet 2 and the absorbent body 4 by pressure bonding on the skin contact surface side (topsheet 2 side). Middle and high portions may be formed.

  Further, the shape (outer shape) of the napkin 1 in plan view is not limited to a rectangular shape as shown in FIG. 1. For example, even if the longitudinal front and rear ends of the napkin 1 are curved outwardly in the longitudinal direction. good. Moreover, in the said embodiment, although the sanitary napkin was mentioned as one of the application examples of the absorbent article of this invention, it is applicable also to absorbent articles, such as a panty liner (orimono sheet), for example. Each structure mentioned above can be combined suitably.

FIG. 1 is a plan view showing a non-skin contact surface side (back sheet side) of a sanitary napkin that is an embodiment of the absorbent article of the present invention. FIG. 2 is a plan view of the state in which the napkin shown in FIG. 1 is fixed to the crotch part of the underwear as seen from the inner surface side of the underwear. FIG. 3 is a schematic diagram of a cross section taken along line II in FIG. FIG. 4 is a view corresponding to FIG. 1 of another embodiment of the present invention.

Explanation of symbols

1 Sanitary napkin (absorbent article)
2 Top sheet 3 Back sheet 4 Absorber 4a Absorber side edge 4b Absorber constricted part 5 Absorbent body 6 Side flap part 6a Side flap part side edge 6A Side flap part front part 6B Central part of side flap part 6C Rear part of side flap part 7 First adhesive part 8 Second adhesive part 9 Slit 10 Adhesive part application part 50 Crotch part of underwear (crotch part)

Claims (4)

A vertically long absorbent main body comprising a front sheet on the skin contact surface side, a back sheet on the non-skin contact surface side and an absorber disposed between both sheets, and side flaps on both longitudinal sides of the absorbent main body An absorbent article having a pair of side flap portions that function as:
A first adhesive portion for fixing the absorbent main body to the clothing is disposed in an arrangement region of the absorber on the non-skin contact surface side of the back sheet,
Both side edges along the longitudinal direction of the absorbent main body in the pair of side flap portions are linearly parallel to each other,
Each of the pair of side flap portions has a front portion, a center portion, and a rear portion in the longitudinal direction of the absorbent main body, and the side flap portions are folded back on the non-skin contact surface side of the center portion for clothing. An absorbent article in which a second adhesive part to be fixed is arranged.   The absorbent article according to claim 1, wherein at least a part of each of the front portion and the rear portion of the side flap portion has extensibility in a longitudinal direction of the absorbent main body.   The plurality of slits extending in the width direction of the absorbent main body and arranged in parallel in the longitudinal direction of the absorbent main body are formed in each of the front portion and the rear portion of the side flap portion. Absorbent article. The top sheet and the back sheet have extending portions that extend outward in the width direction from the respective side edges in the longitudinal direction of the absorber, and a pair of the side flap portions are configured by these extending portions. And
The absorbent body has a constricted portion in which both side edges in the longitudinal direction are constricted inward in the width direction in the excretion portion facing portion facing the excretion portion of the wearer of the absorbent article, and the absorbent article is It has a vertically long rectangular shape in plan view.
Between the top sheet and the back sheet constituting the pair of side flap portions, an adhesive application part is disposed along both side edges in the longitudinal direction of the absorber including at least both side edges of the constricted part. The absorptive article according to any one of claims 1 to 3.

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