JP4976066B2 - Absorbent articles - Google Patents

Description

  The present invention relates to absorbent articles such as sanitary napkins, panty liners, and incontinence pads for absorbing menstrual blood and vaginal discharge, and more specifically, so as to be able to fit a fissure regardless of the wearer's body shape. Relates to the absorbent article.

  Conventionally, as absorbent articles such as sanitary napkins, panty liners, incontinence pads, liquid-impervious backsheets such as polyethylene sheets or polyethylene laminate sheets nonwoven fabrics, and liquid-permeable top sheets such as nonwoven fabrics or liquid-permeable plastic sheets There is known an intervening absorber made of cotton-like pulp or the like.

  In this type of absorbent article, various measures are taken to prevent after-leakage of excreted body fluid through the groin groove. For example, in Patent Document 1 below, in order to obtain an absorbent article that always fits with the curve or movement of the body, at least the central part in the longitudinal direction of the absorbent layer is fixed to the leak-proof layer, while Is formed with a rear free edge that is not fixed to the leak-proof layer, and an elastic member is disposed on the rear free edge along the longitudinal direction of the absorbent body over a predetermined length. Thus, there is disclosed an absorbent article in which the rear free edge portion stands up above the leak-proof layer. Further, in Patent Document 2 below, the liquid blocking section is provided with a selective bending zone extending in the longitudinal direction in order to make an absorbent article that fits more by the groove of the flange and prevents leakage, and bends in the selective bending zone. A sanitary napkin that can enter a groove in a wearer's buttocks is disclosed.

  However, although the absorbent article described in Patent Document 1 below can cope with the curvature of the buttock surface, it cannot prevent leakage through the groove of the buttock, and the sanitary napkin described in Patent Document 2 below is The liquid blocking part naturally adheres slightly to the wearer's skin, and this part is easy to outline the body, and is configured to follow the groove of the buttocks, so that it is firmly attached to the deepest part of the groove of the buttocks I couldn't.

  In order to prevent the reliable after-leakage from the groove | channel of these collar parts, the absorbent article which made the absorber contact | adhere so that the groove | channel of a collar part might be filled is proposed. For example, in Patent Document 3 below, in order to obtain an absorbent article that easily maintains the adhesion to the groove of the buttocks when the body moves, the main body portion is fixed to the front portion, and the main body portion is not fixed to the rear free portion. In the surface structure divided into the above, the rear free portion is formed to have a width dimension smaller than the main body portion and smaller than the front portion, and 5 degrees left and right with respect to the center line of the main body portion. An absorbent article that can be deformed at the above angles is disclosed.

Moreover, in the following Patent Document 4, the absorber is composed of a lower absorbent body and an upper absorbent body narrower than the lower absorbent body, and the upper absorbent body is on the surface side of the absorbent article and at the center position in the longitudinal direction of the napkin. Disposed at least from the front side position of the blood drainage site to a range including the blood drainage site is substantially joined and integrated with the lower absorber side, and further from the joining rear end position to the range including the blood drainage site. Since the rear portion is not joined to the lower absorber side and constitutes a free section that is not substantially restrained from moving, even if there is a large movement of the lower absorber, it is not transmitted to the upper absorber side, so that the position shift There has been disclosed an absorbent article that can maintain a fitted state without causing leakage and reliably prevent leakage.
Japanese Patent Laid-Open No. 11-104169 JP 2000-185074 A JP 2003-79662 A JP 2003-10242 A

  Although the absorbent articles described in Patent Documents 3 and 4 are all in close contact with the absorbent body so as to fill the groove of the buttock, it is possible to reduce leakage through the groove of the buttock, but the patent Since the absorbent articles described in Documents 3 and 4 are those in which the absorbent body is brought into close contact with the groove of the buttock by the tightening force of the underwear, the fit of the absorbent body was different depending on the tightening force of the underwear. That is, when an undergarment with a loose tightening force is used, the rear free part in Patent Document 3 and the upper absorbent body in Patent Document 4 cannot be brought into close contact with the deepest part of the rupture, and rear leakage of body fluid occurs. There was a problem. Furthermore, the absorptive article of the said patent documents 3 and 4 differed in the adhesiveness or wearing feeling in the groove | channel of a buttocks also by the wearer's body shape. That is, for a slim type wearer with little fleshing of the buttocks, while it can be closely attached to the deep part of the groove of the buttocks, on the contrary, discomfort such as a feeling of gore occurs, whereas an obese type with many fleshing of the buttocks For the wearer, the wearer could not be brought into close contact with the deepest portion of the groove of the buttocks.

  Therefore, the main problem of the present invention is that the fit of the absorbent body does not change depending on the difference in the body shape of the wearer or the tightening force of the underwear to be worn, and it can be closely attached to the deepest part of the groove of the buttocks. An object of the present invention is to provide an absorbent article that can surely prevent leakage.

As the present invention according to claim 1 for solving the above-mentioned problem, in an absorbent article in which an absorbent body is interposed between a liquid-permeable top sheet and a back sheet,
A woven portion in which the back sheet is woven in the width direction is provided at least in a rear portion of the back sheet and in the center in the width direction, and the back sheet is laid along the longitudinal direction in the woven portion of the back sheet. lifting up member that Mashimasu extends to the outside beyond the edge is arranged,
The weaving portion is formed by forming a Z-shaped folded portion on one side across the center position in the width direction of the back sheet and forming an inverted Z-shaped folded portion on the other side in a cross-sectional view. The absorbent article is provided at the center in the width direction of the back sheet and bonded to the outer surface or the inner surface thereof.

  In the present invention according to the first aspect, at the time of mounting, it is possible to bite and adhere the absorber to the deep layer portion of the groove of the flange portion by picking the extending portion of the lifting member and pulling it upward. Become. This solves the conventional problem that the fit of the absorbent body differs depending on the wearer's body shape, that is, the difference between the flesh of the buttocks and the tightening force of the underwear to be worn. Further, in the case of a conventional absorbent article, in the case of a lean wearer with little flesh of the buttocks, on the contrary, the wearer himself pulled the lifting member in the present invention. Since the absorber is raised and bites into the buttocks, it is possible to adjust the position of the absorber and the like so as not to feel uncomfortable while fitting the absorber to the buttocks.

Furthermore, the provided partial weave to the backsheet, the lifting by providing the member to the weaving section, irrespective of the elongation of the backsheet, now the absorber can bite into the cleft of the buttocks reliably rear leakage Can be prevented.

As the present invention according to claim 2, wherein the lifting member, when mounting the said absorbent article, the absorbent article according to claim 1 Symbol placement fracture or adhesion are to be peeled off when multiplied by the predetermined tensile force Is provided.

According to the second aspect of the present invention, when the lifting member is broken or peeled off at the time of wearing, there is no possibility of giving unpleasant feeling such as a feeling of gore during wearing.

As the present invention according to claim 3 , the absorbent body is divided into two along the longitudinal direction at the center in the width direction at least in the rear part, or divided into a plurality along the longitudinal direction . 2. An absorbent article according to any one of 2 is provided.

As the present invention according to claim 4 , there is provided the absorbent article according to any one of claims 1 and 2 , wherein the absorbent body is formed with a thin central portion in the width direction along the longitudinal direction at least in the rear portion. The

As the present invention according to claim 5 , there is provided the absorbent article according to any one of claims 1 and 2 , wherein the absorbent body is provided with a groove along the longitudinal direction at the center in the width direction at least in the rear part. Is done.

Invention described in claims 3-4 wherein, the divided parts of the absorbent body, since it is easy bent at the thin portion or groove, easily bite into the cleft of the buttocks by the absorber is easily deformed.

As the present invention according to claim 6, wherein said absorbent body, at least in the rear part, the claims plurality of grooves or streaks along the width direction at intervals in the longitudinal direction are formed 1, 2 according to any one An absorbent article is provided.

In the invention according to the sixth aspect, since a plurality of grooves or streaks are formed along the width direction at intervals in the longitudinal direction, the absorber or the medium-high absorber is easily deformed in the vertical direction. The absorber can be fitted tightly along.

  As described above, according to the present invention, the fit of the absorbent body does not change due to the difference in the body shape of the wearer or the tightening force of the underwear to be worn, and it can be tightly adhered to the deepest part of the groove of the buttocks It is possible to prevent back leakage without fail.

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

[Basic structure of sanitary napkin 1]
1 is a development view of a sanitary napkin 1 according to a first embodiment of the present invention, FIG. 2 is a view taken along the line II-II in FIG. 1, and FIG. 3 is a view taken along the line III-III in FIG. 4 is a view taken along the line IV-IV in FIG.

The sanitary napkin 1 includes a liquid-impervious back sheet 2 made of a polyethylene sheet, a liquid-permeable top sheet 3 that allows permeation of menstrual blood, cages, and the like, and an intervening sheet between the sheets 2 and 3. Absorbent bodies 4 and 6 made of cotton-like pulp or synthetic pulp, etc., crepe paper 5 surrounding the absorbent body 4 for maintaining the shape of the absorbent body 4 and improving diffusibility, and the abbreviation of the absorbent body 4 It is mainly composed of a pair of left and right three-dimensional gathers BS, BS provided to protrude from the surface side in a predetermined section in the front-rear direction so that the side edge portion is an upright base end and includes at least a body fluid discharge portion, and In the periphery of the absorbent body 4, the outer edge portions of the liquid-impervious backsheet 2 and the liquid-permeable topsheet 3 are formed at the upper and lower edge portions thereof by an adhesive such as hot melt or an adhesive means such as heat seal. In addition, the liquid-impervious backsheet 2 extending laterally from the absorbent body 4 at both side edges and the side nonwoven fabric 7 forming the three-dimensional gather BS are bonded by hot melt or the like. Wing-like flaps W and W that are joined by adhesive means such as an agent and heat seal and project laterally by the laminated sheet portion of the liquid-impermeable back sheet 2 and the side nonwoven fabric 7 are formed. the second wing-shaped flaps W _B to the portion located on the buttocks _side, W _B are formed. In the present invention, in particular, in order to improve the fit of the flange portion to the groove and to reliably prevent rear leakage, at least the rear portion of the absorber 4 and the center in the width direction, along the longitudinal direction. A lifting member 14 that extends beyond the rear end edge of the backsheet 2 to the outside and is bonded to a position on the outer surface side of the absorber 4 (position on the backsheet 2 side) is disposed.

Hereinafter, the structure of the sanitary napkin 1 will be described in detail.
As the liquid-impervious backsheet 2, a sheet material having at least water shielding properties such as polyethylene is used, but in recent years, a material having moisture permeability tends to be used from the viewpoint of preventing stuffiness. The water- and moisture-permeable sheet material is a microporous material obtained by melting and kneading an inorganic filler in an olefin-based resin such as polyethylene or polypropylene to form a sheet, and then stretching in a uniaxial or biaxial direction. A sheet is preferably used. One or a plurality of adhesive layers (not shown) are formed on the non-use side (outer surface) of the liquid-impermeable back sheet 2 so as to fix the sanitary napkin 1 to the underwear when worn on the body. It has become. As the liquid-impermeable back sheet 2, a polylaminated nonwoven fabric in which a plastic film and a nonwoven fabric are laminated may be used.

  Next, the liquid-permeable top sheet 3 is preferably a porous or non-porous nonwoven fabric or a porous plastic sheet. As the material fibers constituting the nonwoven fabric, in addition to olefins such as polyethylene or polypropylene, polyesters, polyamides, and other synthetic fibers, regenerated fibers such as rayon and cupra, and natural fibers such as cotton can be used. A nonwoven fabric obtained by an appropriate processing method such as a method, a spun bond method, a thermal bond method, a melt blown method, or a needle punch method can be used. Among these processing methods, the spunlace method is excellent in terms of flexibility and drapeability, and the thermal bond method is excellent in terms of being bulky and soft. When a large number of through holes are formed in the liquid permeable top sheet 3, menstrual blood, venom, etc. (hereinafter collectively referred to as body fluid) are quickly absorbed, and the dry touch property is excellent. It will be a thing.

  The absorber 4 has a structure in which an upper layer absorber 4A and a lower layer absorber 4B are laminated. The lower layer absorber 4B has a planar shape that defines the outer edge of the absorber arrangement region, and the upper layer absorber 4A is formed in a region that is elongated in the napkin longitudinal direction at the center portion in the width direction, on the use surface side. Arranged to form the mid-high section 6 of the high absorber. The thickness of the middle-high portion 6 is preferably 3 to 25 mm, preferably 5 to 18 mm, because if the thickness is too large, the rigidity of the absorbent body 4 increases and the adhesion to the body decreases. Embosses 8 that are closed in the circumferential direction are provided along the peripheral edge of the upper layer absorbent body 4 </ b> A, and embosses 9, 10, and 11 are formed respectively. The embossing 8 is an embossing provided to prevent the positional deviation of the upper layer absorbent body 4A and to precisely define the middle and high portions 6.

  The upper absorbent body 4A includes at least pulp fibers and synthetic fibers, and the ratio of the pulp fibers: synthetic fibers is 80 to 20:20 to 80, preferably 40 to 60:60 to 40 in terms of weight. It is desirable that

  The upper layer absorbent 4A functionally absorbs bodily fluid rapidly, but discharges the absorbed bodily fluid to the upper surface of the liquid-permeable top sheet 3 and the first function to permeate the lower layer absorbent 4B without holding it inside. It is necessary to satisfy both the second function and the second function for quickly absorbing the body fluid, and if the synthetic fiber is mixed too much in order to improve the permeability of the first function, the synthetic fiber has water absorption. However, even if it has been subjected to a hydrophilic treatment, the water absorption rate is low, so the absorption rate of the body fluid will decrease. In the case of a particularly large amount of menstrual blood, in order to prevent leakage after wearing the napkin for 1 hour, it is desirable that at least the liquid permeability of the upper absorbent body 4A is 85% or more and the absorption rate is 25 seconds or less. By setting the mixing ratio of the synthetic fiber and the pulp fiber to the above numerical value, the first function and the second function can be achieved in a balanced manner. Further, by mixing synthetic fiber at least with the upper layer absorbent body 4A, the bulk can be maintained and the cushioning property can be maintained without being deflated even when the body fluid is absorbed.

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

  The upper layer absorbent body 4A can contain a highly water absorbent resin. Examples of the superabsorbent resin include cross-linked polyacrylate, self-crosslinked polyacrylate, saponified acrylate-vinyl acetate copolymer cross-linked, isobutylene / maleic anhydride copolymer cross-linked, Examples include cross-linked polysulfonates, and partially cross-linked water-swellable polymers such as polyethylene oxide and polyacrylamide. Among these, those based on acrylic acid or acrylate that are excellent in water absorption and water absorption speed are preferred. In the production process of the highly water-absorbent resin having the water absorption performance, the water absorption force and the water absorption speed can be adjusted by adjusting the crosslinking density and the crosslinking density gradient. The blending amount is required to promote penetration of the upper absorbent body 4A into the lower absorbent body 4B, and so-called gel blocking phenomenon occurs when the blending amount is increased. Therefore, the blending amount is 1 in terms of weight with respect to the total weight of pulp fibers and synthetic fibers. It is desirable to blend at a ratio of -10%. In addition, when the high water-absorbing resin content exceeds 50%, the entanglement between the pulp fibers is lost, the sheet strength is lowered, and tearing, cracking, and the like are likely to occur.

  Examples of the pulp fiber include chemical fibers obtained from wood, cellulose fibers such as molten pulp, and artificial cellulose fibers such as rayon and acetate. Softwood pulp having a longer fiber length than hardwood pulp functions and It is preferably used in terms of price.

  On the other hand, the lower layer absorbent body 4B does not need to contain a synthetic fiber, and can be a pulp fiber alone or a mixture of a pulp fiber and a superabsorbent resin. In the lower layer absorbent body 4B, permeability is not considered important, and it is desirable that the body fluid that has permeated from the upper layer absorbent body 4A is retained inside and retained so as not to bleed out. . Further, the content of the superabsorbent resin is desirably blended at a ratio of 1 to 20% by weight with respect to the total weight of the fibers constituting the lower layer absorbent body 4B in order to absorb the body fluid and retain the water.

In the illustrated example, the width dimension of the liquid-permeable top sheet 3 is slightly longer than the width of the absorbent body 4 as shown in the cross-sectional views of FIGS. The three-dimensional gathered BS stops depending on the purpose such as preventing the penetration of side non-woven fabric 7 different from the liquid-permeable top sheet 3, specifically menstrual blood or vaginal discharge, or enhancing the feeling of touch. The nonwoven fabric material is subjected to appropriate water repellent treatment or hydrophilic treatment. The side nonwoven fabric 7 can be made of natural fiber, synthetic fiber, regenerated fiber, or the like and formed by an appropriate processing method. Preferably, the side nonwoven fabric 7 eliminates the feeling of stickiness and prevents stuffiness. For this reason, it is preferable to use a non-woven fabric with reduced basis weight and air permeability. Specifically, it is desirable to use a nonwoven fabric prepared with a basis weight of 15 to 23 g / m ² , and silicon-based, paraffin-based, alkylchromic chloride-based water repellents, etc. to reliably prevent the passage of body fluids. A water repellent nonwoven fabric coated with is preferably used.

As shown in FIGS. 2 and 3, the side nonwoven fabric 7 has an outer portion from the intermediate portion in the width direction from the inner position of the absorbent body 4 to slightly beyond the absorbent side edge to the outer edge of the liquid-impermeable backsheet 2. A pair of left and right wings are bonded to the absorbent body side portion substantially corresponding to the body fluid discharge portion by the laminated sheet portion of the side nonwoven fabric 7 and the liquid-impervious back sheet 2. flaps W, to form a W, a second wing-shaped flaps W _B now to the buttocks side _position, to form a W _B. These wing-shaped flaps W, W and second wing-shaped flaps W _B, W outer surface respectively the adhesive layer on the side 12 of the _B ..., 13 ... comprises a, as shown in Figure 17, when worn against shorts 30, wherein The wing-shaped flaps W, W are folded back to the opposite side at the position of the folding line RL, and are wound around the crotch portion of the shorts and fastened.

  An inner side portion of the side nonwoven fabric 7 is folded substantially double, and inside this double sheet, a thread-like elastic elastic member 19 having both ends or appropriate positions in the longitudinal direction fixed to the intermediate portion in the height direction is provided. In addition, a plurality of, in the illustrated example, two thread-like elastic elastic members 20 and 20 are arranged on the upper portion of the thread-like elastic elastic member 19 in a state where both ends or appropriate positions in the longitudinal direction are fixed. Has been. As shown in FIG. 3, the double sheet portion is folded and laminated in a Z-shaped cross section at the front and rear end portions, and is bonded to the absorbent body 4 side, whereby the thread elastic elastic member 19 is disposed. As the bending points, three-dimensional gathers BS and BS standing on the surface side are formed while forming pockets P and P having openings inward in a cross-sectional shape.

[Lifting member 14]
In the sanitary napkin 1 according to the present invention, at least the rear portion of the absorbent body 4 and in the center in the width direction, extend to the outside beyond the rear edge of the backsheet 2 along the longitudinal direction, A lifting member 14 bonded to the outer surface side (back sheet 2 side) of the absorber 4 is disposed. An extending portion 14 a extending from the back sheet 2 of the lifting member 14 is for constituting a knob.

  Although a specific example of the arrangement of the lifting member 14 will be described later, the lifting member 14 is used to bite the absorbent body 4 to the deepest portion of the groove of the buttock. In use, the sanitary napkin 1 is used. 4 is applied to the crotch portion, the wearer picks up the extended portion 14a and pulls it upward as shown in FIG. Therefore, the back leak can be reliably prevented without changing the fit of the absorbent body due to the difference in the body shape of the wearer or the tightening force of the underwear to be worn.

  As the lifting member 14, a material such as a nonwoven fabric, an elastic body, a string, or the like having such a strength that it cannot be torn even when a tensile force is applied in order to sandwich the absorber 4 in the groove of the buttocks at the time of wearing can be used. Alternatively, when the sanitary napkin 1 is attached, the breakage or adhesion can be peeled off when a predetermined tensile force is applied. In this case, since the lifting member 14 is eliminated, it is preferable in that it does not give an unpleasant feeling such as a feeling of sticking during wearing.

On the other hand, in the case where the lifting member 14 is left behind, if an adhesive layer (not shown) is provided at the tip including the extending portion 14a, it can be adhered to the skin and underwear of the wearer. It becomes possible to fix by. Further, when an adhesive layer is provided at the tip of the lifting member 14 described above, it can be used as a post-treatment tape when the product is rolled and fixed after the sanitary napkin 1 is used.
[Disposition form of lifting member 14]
Next, the arrangement | positioning form of the lifting member 14 is explained in full detail based on FIGS.

FIG. 5 is a first reference example showing the arrangement of the lifting members 14. In this embodiment, as shown in FIG. 4A, at least the rear portion of the absorber and the center in the width direction extends to the outside beyond the rear edge of the backsheet along the longitudinal direction. In addition, a lifting member 14 bonded to the outer surface side of the absorber 4 is disposed. At the time of use, as shown in FIG. 5B, the central portion of the absorbent body 4 can be bitten into the groove of the heel portion by grasping and pulling the extending portion 14a of the lifting member 14. The lifting member 14 is preferably disposed at a position on the outer surface side of the absorbent body 4 in order to press the absorbent body 4 against the body, but the lifting member 14 may be a nonwoven fabric, a pulp nonwoven fabric, an airlaid nonwoven fabric, or the like. Thus, when it is set as the raw material which can absorb a bodily fluid, you may arrange | position on the upper surface side of the absorber 4. FIG.

FIG. 6 is a second reference embodiment showing the arrangement of the lifting members 14. In this embodiment, the lifting member 14 is disposed between the lower layer absorber 4B and the upper layer absorber 4A (medium / high absorber). Specifically, as shown in FIG. 5A, at least the rear portion of the upper layer absorbent body 4A and the center in the width direction, beyond the rear edge of the backsheet 2 along the longitudinal direction. The lifting member 14 that extends to the outside and is bonded to the upper absorbent body 4A is disposed. At the time of use, as shown in FIG. 5B, the upper layer absorbent body 4A can be bitten into the groove of the buttock by grasping and pulling the extending portion 14a of the lifting member 14. In the present embodiment, the narrow upper layer absorbent body 4A is bitten into the groove of the buttock, so that it can be surely fitted.

FIG. 7 is an embodiment of the present invention showing the arrangement of the lifting members 14. In this embodiment, as shown in FIG. 2A, a woven portion 2a in which the backsheet 2 is woven in the width direction is provided at least in the rear portion of the backsheet 2 and in the center in the width direction. A lifting member 14 that extends to the outside beyond the rear edge of the backsheet 2 along the longitudinal direction is disposed at the center in the width direction of the woven portion 2a, and is adhered to the outer surface of the backsheet 2. It is what I did. At the time of use, as shown in FIG. 5B, the absorbent body 4 can be digged into the groove of the flange portion by grasping and pulling the extending portion 14a of the lifting member 14. In this embodiment, by providing the backsheet 2 with the weaving portion 2a, the backsheet 2 can be bitten into the groove of the buttocks without being influenced by the elongation of the backsheet 2. The lifting member 14 can be bonded to the inner surface side of the back sheet 2.

Next, in the third reference example shown in FIGS. 8 to 10, the lower layer absorbent body 4 </ b> B is interposed between the liquid-permeable top sheet 3 and the back sheet 2 as shown in FIGS. 8 and 9. The upper absorbent body 4A (middle / high portion 6) is a separate member surrounded by a liquid permeable sheet, and the upper absorbent body 4A is at least a rear part and at the center in the width direction, the liquid permeable top sheet. In the structure in which a non-adhesive region (dashed hatch portion in FIG. 8) that is not bonded to 3 is formed, the rear edge of the back sheet 2 is passed along the longitudinal direction at the center in the width direction of the non-adhesive region of the upper absorbent body 4A. The lifting member 14 that extends to the outside and is bonded to the back side of the upper absorbent body 4A is provided.

  In use, as shown in FIGS. 9B and 10, the upper layer absorbent body 4A can be bitten into the groove of the buttock by picking the extending portion 14a of the lifting member 14 and pulling it upward. . In the present embodiment, since the upper layer absorbent body 4A is provided on the use surface side of the liquid-permeable top sheet 3, it is possible to maintain a reliable bite into the groove of the buttocks without being influenced by the elongation of the liquid-permeable top sheet 3. become.

In the case of the above reference third embodiment, the length of the upper layer absorber 4A (medium / high absorber) on the upper side of the lifting member 14 may exceed the rear edge of the backsheet 2. In that case, it is desirable that the lifting member 14 is a member having a leak-proof property like the material of the back sheet 2 so that the body fluid does not ooze out from the extended portion. When the upper layer absorbent body 4A is extended from the rear end edge of the back sheet 2, the length of the lower layer absorbent body 4B can be shortened, so that it is not necessary to cover the heel part widely and it is difficult to feel uncomfortable.

In the above reference first to third embodiments and the embodiment of the present invention , the lifting member 14 is bonded to the absorbers 4A, 4B or the back sheet 2 by hot melt bonding, heat seal bonding, ultrasonic bonding, or the like. Can do.

[Other examples]
(1) In the above embodiment, the structure of the absorber 4 or the upper-layer absorbent body 4A that bites into the groove of the buttocks is not particularly defined, but as shown in FIGS. 11 to 14, it is easy to bite into the groove of the buttocks. It can be a structure. 11 to 14 are cross-sectional views of the absorber 4, the upper-layer absorber 4A, and the lifting member 14.

  FIG. 11 shows an example in which at least the rear portion of the absorber 4 (or the upper layer absorber 4A) is divided into two in the longitudinal direction at the center in the width direction. FIG. 12 shows an example in which at least a rear portion of the absorber 4 (or the upper layer absorber 4A) is formed thin by reducing the thickness of the absorber at the center in the width direction. FIG. 13 is an example in which a groove is provided along the longitudinal direction at the center in the width direction at least in the rear portion of the absorber 4 (or the upper layer absorber 4A). FIG. 14 shows an example in which at least a rear portion of the absorber 4 (or the upper layer absorber 4A) is divided into a plurality along the longitudinal direction. Thus, the absorbent body 4 has the structure shown in FIGS. 11A to 14A so that the absorbent body 4 (or the upper layer) can be used as shown in FIGS. Since the absorber 4A) is easily bent at the divided portion, thin portion, or groove, the absorber 4A is easily deformed and easily bites into the groove of the flange portion (S direction in FIG. 16).

  FIG. 15 is a longitudinal sectional view of a main part of the absorber 4 (or the upper layer absorber 4A) and the lifting member 14. As shown in the figure, this is an example in which a plurality of grooves or streaks are formed at intervals in the longitudinal direction in the rear portion of the absorbent body 4, that is, in the portion that bites into the groove of the collar portion. Thereby, in a use state, the deformation | transformation to the vertical direction (L direction of FIG. 16) of the groove | channel of a collar part becomes easy, and a fitting property can be improved now.

It is an expanded view of the sanitary napkin 1 of this invention. It is the cross-sectional view (II-II line arrow view of FIG. 1). It is the cross-sectional view (III-III arrow directional view of FIG. 1). It is a principal part longitudinal cross-sectional view (IV-IV line arrow view of FIG. 1) which shows a mounting state. A reference example of the first arrangement form of the lifting member 14 is shown. (A) is a cross-sectional view of the product state, and (B) is a cross-sectional view of the mounted state. A reference example of a second arrangement form of the lifting member 14 is shown. (A) is a cross-sectional view of the product state, and (B) is a cross-sectional view of the mounted state. An example of the arrangement of the lifting member 14 according to the present invention is shown, (A) is a cross-sectional view of the product state, and (B) is a cross-sectional view of the mounted state. It is a napkin expansion | deployment figure which shows the reference 3rd example of arrangement | positioning form of the lifting member. The reference example 3rd example of arrangement | positioning form of the lifting member 14 is shown, (A) is a product state cross-sectional view (IX-IX arrow directional view of FIG. 8), (B) is a mounting state cross-sectional view. It is a principal part longitudinal cross-sectional view (XX arrow directional view of FIG. 8) which shows the mounting state of the reference 3rd example of arrangement | positioning form of the lifting member 14. FIG. The other form example of the absorber 4 is shown, (A) is a product state cross-sectional view, and (B) is a mounted state cross-sectional view. The other form example of the absorber 4 is shown, (A) is a product state cross-sectional view, and (B) is a mounted state cross-sectional view. The other form example of the absorber 4 is shown, (A) is a product state cross-sectional view, and (B) is a mounted state cross-sectional view. The other form example of the absorber 4 is shown, (A) is a product state cross-sectional view, and (B) is a mounted state cross-sectional view. It is a wearing state longitudinal section showing other examples of absorber 4. It is a figure for demonstrating each direction of a buttocks. It is a perspective view which shows the mounting state of the napkin 1. FIG.

DESCRIPTION OF SYMBOLS 1 ... Sanitary napkin, 2 ... Impermeable back sheet, 3 ... Liquid permeable top sheet, 4 ... Absorber, 4A ... Upper layer absorber, 4B ... Lower layer absorber, 5 ... Crepe paper, 6 ... Middle high part, 7 ... side nonwoven, 8 ... embossed, 14 ... lift member, BS ... standing gathers, W ... wing-shaped flaps, W B _... buttocks side wing-shaped flaps

Claims (6)

In an absorbent article in which an absorber is interposed between a liquid-permeable top sheet and a back sheet,
A woven portion in which the back sheet is woven in the width direction is provided at least in a rear portion of the back sheet and in the center in the width direction, and the back sheet is laid along the longitudinal direction in the woven portion of the back sheet. lifting up member that Mashimasu extends to the outside beyond the edge is arranged,
The weaving portion is formed by forming a Z-shaped folded portion on one side across the center position in the width direction of the back sheet and forming an inverted Z-shaped folded portion on the other side in a cross-sectional view. The absorbent article is a center position in the width direction of the back sheet, and is bonded to the outer surface side or the inner surface side thereof .   2. The absorbent article according to claim 1, wherein the lifting member is configured to break or bond when a predetermined tensile force is applied when the absorbent article is mounted. 3.   The absorbent article according to any one of claims 1 and 2, wherein at least a rear portion of the absorbent body is divided into two along the longitudinal direction at the central portion in the width direction or divided into a plurality along the longitudinal direction. .   The absorbent article according to any one of claims 1 and 2, wherein at least a rear portion of the absorbent body is formed with a thin central portion in the width direction along the longitudinal direction.   The absorbent article according to any one of claims 1 and 2, wherein at least a rear portion of the absorbent body is provided with a groove along a longitudinal direction at a central portion in the width direction.   The absorbent article according to claim 1, wherein a plurality of grooves or streaks are formed along the width direction at intervals in the longitudinal direction at least in the rear part.

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