JP4773331B2 - 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 portion in the longitudinal direction of the absorbent layer is fixed to the leak-proof layer, while at the rear portion of the absorbent layer. 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.

Further, in Patent Document 5 below, in an absorbent article comprising a liquid permeable top sheet, a liquid impermeable back sheet, and the absorbent core surrounded by the top sheet and the back sheet, the absorbent core Includes a central core piece and a pair of side core pieces disposed on both sides of the central core piece, and when the compressive force in the width direction is applied, each of the side core pieces is displaced inward in the width direction. An absorbent article is disclosed that is configured to sneak under the strip.
Japanese Patent Laid-Open No. 11-104169 JP 2000-185074 A JP 2003-79662 A JP 2003-10242 A JP-A-9-561

  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.

  Further, in the case of the absorbent article described in Patent Document 5, the side cores on both sides move inwardly by the tightening force around the legs, and the center core piece moves upward to fit the body. Although it is intended to fit the body in the vicinity of the blood drainage port, it cannot be brought into close contact with the groove of the buttocks because no lateral tightening force acts on the buttocks on the buttocks side. In addition, the side cores on both sides move inward so as to sink into the lower side, so that the side cores tend to be relied on, and the side cores and the central core tend to gather together in a bundle, and the center over the entire length. When it overlaps with the side core on both sides of the core, there is a problem that this overlapping portion brings a sense of incongruity.

  Thus, the main problem of the present invention is that 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 the absorbent body can be tightly adhered to the groove of the buttocks. An object of the present invention is to provide an absorbent article that does not rely on the body or gather in a bundle over the entire length, and that allows the absorbent body to be in close contact with the groove of the buttocks without a sense of incongruity.

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,
The back sheet has a width dimension in which a folding margin in the width direction is added in the middle, and the absorbent body has a three-part absorption structure in the longitudinal direction composed of a central absorbent body and a pair of side absorbent bodies arranged on both sides thereof. The absorbent body is disposed on the upper surface side of the back sheet with an interval in the width direction, and the liquid-permeable top sheet is disposed on the upper surface side so as to cover the absorbent body of the three-part structure. ,
A sheet portion where no absorber exists between the central absorbent body and the pair of side absorbent bodies is folded back toward the back sheet along substantially the side edge of the central absorbent body, and the central absorbent After inverting and folding at a substantially lower surface position of the body, paste a reinforcing sheet so that the folded part does not expand on the back side,
In the front region including the blood drainage portion corresponding portion of the absorbent article, the folding sheet portions are bonded to each other so that the central absorbent body does not lift up, and in the rear region of the absorbent article, There is provided an absorbent article characterized in that the central absorbent body can be lifted with the folded sheet portions non-adhered.

  In the present invention described in claim 1, the absorbent body is a longitudinally divided absorbent body composed of a central absorbent body and a pair of side absorbent bodies arranged on both sides thereof, and absorbs in the manner described above. By assembling the article, in the front region including the blood drainage part corresponding part of the absorbent article, the central absorbent body is prevented from lifting by adhering the folding sheet parts to each other. And a pair of side absorbent bodies are arranged in parallel, while in the rear region of the absorbent article, the central absorbent body can be lifted by non-adhering the folded sheet portions It is a thing.

  In particular, in the rear region of the absorbent article, since the back sheet has a certain degree of rigidity, the center absorbent body is lifted upward from the side absorbent body even in the natural state. Even if there is a difference between the above and the tightening force of the underwear to be worn, the central absorbent body can tightly adhere the absorbent body to the groove of the buttocks. Further, since the central absorbent body and the pair of side absorbent bodies are arranged in an array in the front region of the absorbent body, due to this influence, the absorbers can be relied on in the rear region of the absorbent article, It is possible to prevent the absorbent body from sticking together in a bundle over the entire length, and to adhere the absorbent body to the groove of the buttocks without a sense of incongruity.

  According to a second aspect of the present invention, there is provided a body fluid diffusion sheet interposed between the absorber and the backsheet and in a range including the central absorber and the pair of side absorbers. An absorbent article according to 1 is provided.

  In the invention according to the second aspect, since the absorbent body has a three-part structure in the longitudinal direction in the absorbent article, the absorbed body fluid does not diffuse in the lateral direction. Therefore, by interposing the body fluid diffusion sheet, the body fluid can be transferred between the absorbers, and the body fluid can be diffused in the lateral direction and the amount of absorption can be increased.

The present invention according to claim 3 is an absorbent article in which an absorber is interposed between the liquid-permeable top sheet and the body fluid diffusion sheet, and a back sheet that covers the entire back surface is disposed,
The body fluid diffusion sheet has a width dimension in which a folding margin in the width direction is added in the middle, and the absorbent body has a three-part structure in the vertical direction including a central absorbent body and a pair of side absorbent bodies disposed on both sides thereof. In addition to the absorbent body, each absorbent body is disposed on the upper surface side of the body fluid diffusion sheet at intervals in the width direction, and a liquid-permeable top sheet is disposed on the upper surface side so as to cover the absorbent body of the three-part structure. Place and
A sheet portion where there is no absorber between the central absorber and the pair of side absorbers is folded back toward the body fluid diffusion sheet along the substantially side edge of the central absorber, and the central portion After being inverted and folded at the substantially lower surface position of the absorber, the back sheet is pasted so as to cover the entire back side,
In the front region including the blood drainage portion corresponding portion of the absorbent article, the folding sheet portions are bonded to each other so that the central absorbent body does not lift up, and in the rear region of the absorbent article, There is provided an absorbent article characterized in that the central absorbent body can be lifted with the folded sheet portions non-adhered.

  In contrast to the invention described in claim 1, the invention described in claim 3 shows a mode in which the back sheet and the reinforcing sheet in the invention described in claim 1 are replaced with the body fluid diffusion sheet and the back sheet, respectively. . Basically, the same effect as that of the invention of claim 1 can be obtained. However, the body fluid diffusion sheet allows the body fluid to be easily transferred between the absorbers, and the body fluid is diffused and absorbed in the lateral direction. Increase can be achieved.

  The absorbent according to any one of claims 1 to 3, wherein, as the present invention according to claim 4, the central absorbent body is gradually narrowed in width toward the rear side in the rear region of the absorbent article. Articles are provided.

  In the invention according to the fourth aspect, since the rear side portion of the central absorbent body is gradually narrowed toward the rear side, it becomes easy to enter the groove of the collar portion. Further, as the distance from the rear side increases, the separation between the central absorber and the side absorber gradually increases, so that the rising margin of the central absorber is secured, and the rising height of the central absorber is increased. It becomes possible to enlarge.

  As the present invention according to claim 5, the side absorbent body is arranged in the rear region of the absorbent article so that the separation from the central absorbent body gradually increases toward the rear side. The absorbent article as described in any one of -3 is provided.

  In the invention according to claim 5, as the distance from the central absorbent body to the lateral absorbent body gradually increases as going to the rear side, the rising margin of the central absorbent body is secured, It is possible to increase the rising height of the part absorber, and the absorber can be brought into close contact with the deep part of the groove of the collar part.

  As this invention which concerns on Claim 6, in the back side area | region of the said center part absorber, with respect to the back sheet | seat or bodily fluid diffusion sheet arrange | positioned at the back surface side of a center part absorber, a rear-end edge of an absorbent article is provided. An absorbent article according to any one of claims 1 to 5, wherein a lifting member extending beyond the outside is provided.

  In the present invention described in claim 6, the center absorbent body is closely attached to the deep part of the groove of the buttock portion by gripping the extending portion of the lifting member and pulling it upward when attached. Is possible.

  As the present invention according to claim 7, in the rear side region of the central absorbent body, it is outside the rear edge of the central absorbent body, and a liquid-permeable top sheet and a back sheet or a body fluid diffusion sheet are provided. The absorbent article according to any one of claims 1 to 5, wherein a cut or hole for hooking a finger is formed in the laminated sheet portion.

  According to the seventh aspect of the present invention, at the time of wearing, the central absorbent body can be brought into close contact with the deep part of the groove of the buttock by hooking a finger into the notch or the hole and pulling it upward. Become.

  As the present invention according to claim 8, a knob is formed at the rear end portion of the absorbent article by an extended portion of a sheet in which a liquid-permeable top sheet and a back sheet or a body fluid diffusion sheet are laminated. Item 6. An absorbent article according to any one of Items 1 to 5 is provided.

  In the invention according to the eighth aspect, at the time of wearing, the center part absorbent body can be brought into close contact with the deep part of the groove of the buttock by picking up the picking margin with a finger and pulling it upward. .

  As described above in detail, 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 the absorbent body can be brought into close contact with the groove of the buttocks. In addition, the absorbent body does not depend on or gathers in a bundle shape over the entire length, and the absorbent body can be brought into close contact with the groove of the buttocks without a sense of incongruity.

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

[First embodiment 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 body 4 (4A to 4C) made of cotton-like pulp or synthetic pulp, etc., crepe paper 5 surrounding each absorbent body 4 for maintaining the shape and diffusibility of the absorbent body 4, and the absorption Mainly from a pair of left and right three-dimensional gathers BS, BS provided on the front side in a predetermined section in the front-rear direction so as to include at least a body fluid discharge part, with a substantially side edge of the body 4 as an upright base end The outer periphery of the liquid-impervious backsheet 2 and the liquid-permeable topsheet 3 is formed of an adhesive such as hot melt, heat seal, etc. Adhesion The liquid-impervious backsheet 2 joined by steps and extending laterally from the absorbent body 4 at both side edges thereof, and the side nonwoven fabric 7 forming the three-dimensional gather BS are hot-melted or the like. Wing-like flaps W and W that are joined by an adhesive means such as an adhesive or heat seal, and project laterally by the laminated sheet portion of these liquid-impermeable backsheet 2 and side nonwoven fabric 7 are formed, This second wing-like flaps portion located buttocks side from W _B, W _B are formed.

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. 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.

  In the sanitary napkin 1, as the liquid-impermeable back sheet 2, as shown in FIG. 9, a width dimension obtained by adding folding margins A and A in the width direction in the middle is used.

  The absorber 4 is an absorber having a three-part structure in the longitudinal direction, which includes a central absorber 4A and a pair of side absorbers 4B and 4C disposed on both sides thereof. As each absorbent body 4, for example, a material in which a highly water-absorbing resin is mixed in pulp or a material in which chemical fibers are mixed in a pulp and a material having a highly water-absorbing resin is mixed is used. As shown in the figure, each of the absorbent bodies 4A to 4C is desirably surrounded by crepe paper 5 in order to quickly retain shape, diffuse menstrual blood, and the like and prevent reversal of once absorbed menstrual blood and the like. Examples of the pulp 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.

  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 content of the superabsorbent resin is preferably 10 to 60%. When the content of the superabsorbent resin is less than 10%, sufficient absorbability cannot be provided, and when it exceeds 60%, the entanglement between the pulp fibers disappears, the sheet strength decreases, and tears, cracks, etc. Is likely to occur.

  In the sanitary napkin 1, as shown in FIG. 9, the central absorbent body 4 </ b> A and the side absorbent bodies 4 </ b> B, 4 </ b> C are disposed on the upper surface side of the liquid-impermeable back sheet 2. 4C are arranged at intervals in the width direction.

  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.

  As shown in FIG. 9, the liquid-permeable top sheet 3 is disposed on the upper surface side where the absorbent bodies 4 </ b> A to 4 </ b> C are disposed so as to cover the entire absorbent body having at least a three-part structure.

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, respectively adhesive layer 10 ... on the outer surface side of the W _B, equipped with a 11 ..., when worn for shorts, the wing-shaped flaps W, W are folded line It is folded back to the opposite side at the RL position and wrapped around the outer surface of the crotch 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 point, solid gathers BS and BS standing on the surface side are formed while forming a pocket with an opening facing inward in a cross-sectional shape.

  In the sanitary napkin 1, the absorption between the central absorbent body 4A and the pair of side absorbent bodies 4B and 4C from the expanded state shown in FIG. 9 as shown in FIG. 10 (A). A sheet portion A (= folding allowance A) where no body exists is folded back to the back sheet 2 side along the substantially side edge of the central absorbent body 4A (folding line (1)), and the central absorbent body 4A When folded, it is reinforced so that the folded portion PL does not expand on the back side as shown in FIG. 10 (B). A sheet 12 is attached to stabilize the folded shape.

  At this time, in the front region including the blood drainage portion corresponding portion H of the sanitary napkin 1 in FIG. 1, the folded sheet portion PL is adhered to each other as shown in FIG. As shown in FIG. 3, in the rear region of the sanitary napkin 1, the central absorbent body 4A can be lifted with the folding sheet portions PL being non-adhered to each other. In the rear region of the central absorbent body 4A, the backsheet 2 has a certain degree of rigidity. Therefore, the central absorbent body 4A is lifted above the side absorbent bodies 4B and 4C even in a natural state. . Accordingly, the central absorbent body 4A can be tightly attached to the groove of the buttocks while being worn on the body. Moreover, since the said center part absorber 4A can move not only to an up-down direction but to the left-right direction, even if there exists a motion in a body, it tracks this and does not impair fitting property.

  By the way, in the rear side region of the central part absorbent body 4A, as shown in FIGS. 1 and 4, with respect to the liquid-impermeable back sheet 2 arranged on the back side of the central part absorbent body 4A, A lifting member 13 extending beyond the rear end edge of the sanitary napkin 1 to the outside is disposed. At the time of mounting, the central absorbent body 4A can be brought into close contact with the deep part of the groove of the buttock by picking up the extending portion of the lifting member 13 and pulling it upward.

  As the lifting member 13, 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 if a tensile force is applied in order to sandwich the central absorbent body 4A in the groove of the buttock when worn. Can do. 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 13 is eliminated, it is preferable in that it does not give an unpleasant feeling such as a feeling of sticking during wearing. If the lifting member 13 is particularly long, the lifting member 13 may look good if it is accommodated in a folded state in the space below the central absorbent body 4A before use.

  In addition to the uniform width shape shown in FIG. 1, the planar shape of the central absorbent body 4 </ b> A is a shape whose width is gradually narrowed toward the rear side in the rear region as shown in FIG. 5. It is also possible. In this case, it becomes easier to enter the groove of the flange portion, and the separation between the central absorbent body 4A and the side absorbent bodies 4B and 4C gradually increases as going to the rear side, so that the rising margin of the central absorbent body 4A is increased. Is secured, and the rising height of the central absorbent body 4A can be increased. Furthermore, as shown in FIG. 6, the separation between the side absorbent bodies 4B and 4C and the central absorbent body 4A gradually increases toward the rear side in the rear region of the sanitary napkin 1. It is also possible to arrange them. In this case, since the separation between the central absorbent body 4A and the side absorbent bodies 4B and 4C is gradually increased, the rising margin of the central absorbent body 4A is secured, and the rising of the central absorbent body 4A is ensured. The height can be increased, and the absorber can be brought into close contact with the deep portion of the groove of the collar portion.

  The modification shown in FIG. 7 is an interlayer between the absorbent bodies 4A to 4C and the liquid-impermeable back sheet 2, and includes a central absorbent body 4A and a pair of side absorbent bodies 4B and 4C. The body fluid diffusion sheet 14 is interposed in the range, and the folding in the width direction is performed in the manner shown in FIG. 10 from this state. In this sanitary napkin 1, since the absorbent body 4 has a three-part structure in the vertical direction, the absorbed body fluid does not diffuse in the lateral direction. Therefore, the body fluid diffusion sheet 14 is interposed between the absorbent bodies in advance. The body fluid can be transferred, and the body fluid can be diffused in the lateral direction and the amount of absorption can be increased. As the body fluid diffusion sheet, a sheet member having an absorptivity such as a hydrophilic nonwoven fabric or a pulp nonwoven fabric is preferably used.

  The modification shown in FIG. 8 shows a mode in which both side surfaces of the central absorbent body 4A and side surfaces of the side absorbent bodies 4B and 4C are bonded with an adhesive in the front region of the sanitary napkin. Is.

[Second embodiment of sanitary napkin 1]
In the first embodiment, the liquid-impervious backsheet 2 has a width dimension obtained by adding folding margins A and A in the width direction in the middle, and the absorbent body 4 is disposed on the central absorbent body 4A and both sides thereof. The absorbent body has a three-part structure in the longitudinal direction composed of a pair of side absorbent bodies 4B and 4C, and the absorbent bodies 4A to 4C are spaced apart in the width direction on the upper surface side of the liquid-impermeable backsheet 2. And the liquid-permeable top sheet 3 is arranged on the upper surface side so as to cover the absorbent bodies 4A to 4C having the three-part structure, and then the central absorbent body 4A and the pair of side absorbent bodies 4B and 4C, the sheet portion A in which there is no absorber is folded back to the back sheet side along the substantially side edge of the central absorber 4A, and is inverted at the substantially lower surface position of the central absorber 4A. And then fold it on the back side Although the reinforcing sheet 12 was attached so that the portion would not spread, the liquid-impermeable back sheet that just replaces the liquid-impermeable back sheet 2 with the body fluid diffusion sheet 15 and covers the entire back surface of the reinforcing sheet 12. A structure in place of 2 can be used.

  Specifically, as shown in FIG. 11 (A), the body fluid diffusion sheet 15 has a width dimension obtained by adding folding allowances A and A in the width direction in the middle, and the absorbent body 4 is the same as in the first embodiment. In addition, the absorbent body has a vertically divided structure composed of a central absorbent body 4A and a pair of side absorbent bodies 4B and 4C disposed on both sides thereof, and each absorbent is absorbed on the upper surface side of the body fluid diffusion sheet 15. After disposing the bodies 4A to 4C at intervals in the width direction and disposing the liquid-permeable top sheet 3 so as to cover the absorber of the three-part structure on the upper surface side, the central absorbent body 4A and the The sheet portions A, A where no absorber exists between the pair of side absorbers 4B, 4C are folded back toward the body fluid diffusion sheet 15 along the substantially side edge of the center absorber 4A, and the center portion After inverting and folding at approximately the bottom surface of the absorber 4A, Said liquid-impermeable back sheet 2 so as to cover the entire side is obtained so as to affixed. In this case, the body fluid is rapidly transferred between the central absorbent body 4A and the side absorbent bodies 4B and 4C. In addition, as the bodily fluid diffusion sheet 15, a sheet member having an absorptivity such as a non-woven fabric or a pulp non-woven fabric that has been subjected to hydrophilic treatment can be preferably used as in the bodily fluid diffusion sheet 14 shown in the first embodiment.

[Other examples]
(1) In the first embodiment, in the rear region of the central absorbent body 4A, as shown in FIGS. 1 and 4, the back sheet 2 disposed on the back side of the central absorbent body 4A On the other hand, the lifting member 13 extending to the outside beyond the rear end edge of the sanitary napkin 1 is disposed, but as shown in FIG. 12, the rear region of the central absorbent body 4A. In this case, the sheet is outside the rear end edge of the central absorbent body 4A and is laminated with the liquid-permeable top sheet 3 and the liquid-impermeable back sheet 2 (the body fluid diffusion sheet 15 in the second embodiment). A notch or hole 16 for hooking a finger is formed in the portion, and at the time of wearing, the finger is inserted into the notch or hole 16 and pulled upward to pull the central absorbent body 4A into the deep part of the groove in the buttock Even if you bite it into close contact There. The notches or holes 16 are preferably convex outward so as to prevent tearing when pulled.
(2) Alternatively, as shown in FIG. 13, a sheet in which a liquid-permeable top sheet 3 and a back sheet 2 (body fluid diffusion sheet 15 in the second embodiment) are laminated on the rear end portion of the sanitary napkin 1. The picking allowance 17 is formed by the extended part of the above, and at the time of mounting, the picking allowance 17 is picked with a finger and pulled upward, so that the central absorbent body 4A is bitten into the deep part of the groove of the buttocks and is brought into close contact therewith. You may do it. In order to prevent the picking allowance 17 from being broken when pulled, it is desirable that the base and the tip have the same width or become narrower toward the tip.

It is an expanded view of the sanitary napkin 1 which concerns on the 1st form example 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 the longitudinal cross-sectional view (IV-IV arrow directional view of FIG. 1). It is a napkin expansion | deployment figure which shows the shape modification of 4A of center part absorbers. It is a napkin expansion | deployment figure which shows the shape modification of side part absorber 4B, 4C. It is a napkin cross-sectional view which shows the modification which interposed the bodily fluid diffusion sheet. It is a napkin transverse sectional view showing a modification of an adhesion mode in folding sheet portion PL. It is an expanded view which shows the assembly procedure (the 1) of this sanitary napkin 1. FIG. It is a cross-sectional view (A) which shows the assembly procedure (the 2) of this sanitary napkin 1, (B). It is the sanitary napkin 1 which concerns on a 2nd form example, Comprising: It is a cross-sectional view (A) and (B) which show the assembly procedure of this sanitary napkin 1. FIG. It is an expanded view of the napkin rear part which shows the other example of a form. It is an expanded view of the napkin rear part which shows the other example of a form.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Sanitary napkin, 2 ... Impermeable back sheet, 3 ... Liquid permeable top sheet, 4 ... Absorber, 4A ... Central part absorber, 4B * 4C ... Side part absorber, 5 ... Crepe paper, 7 ... side nonwoven, 12 ... reinforcing sheet, 13 ... lifting member, 14, 15 ... body fluid diffusion sheet, 16 ... notch or hole, 17 ... knob allowance, BS ... standing gathers, W ... wing-shaped flaps, W B _... buttocks side Wing flap

Claims (8)

In an absorbent article in which an absorber is interposed between a liquid-permeable top sheet and a back sheet,
The back sheet has a width dimension in which a folding margin in the width direction is added in the middle, and the absorbent body has a three-part absorption structure in the longitudinal direction composed of a central absorbent body and a pair of side absorbent bodies arranged on both sides thereof. The absorbent body is disposed on the upper surface side of the back sheet with an interval in the width direction, and the liquid-permeable top sheet is disposed on the upper surface side so as to cover the absorbent body of the three-part structure. ,
A sheet portion where no absorber exists between the central absorbent body and the pair of side absorbent bodies is folded back toward the back sheet along substantially the side edge of the central absorbent body, and the central absorbent After inverting and folding at a substantially lower surface position of the body, paste a reinforcing sheet so that the folded part does not expand on the back side,
In the front region including the blood drainage portion corresponding portion of the absorbent article, the folding sheet portions are bonded to each other so that the central absorbent body does not lift up, and in the rear region of the absorbent article, An absorbent article, characterized in that the central absorbent body can be lifted with the folding sheet portions non-adhered to each other.   The absorbent article according to claim 1, wherein a body fluid diffusion sheet is interposed in a range between the absorbent body and the back sheet and including a central absorbent body and a pair of side absorbent bodies. An absorbent article in which an absorbent body is interposed between the liquid-permeable top sheet and the body fluid diffusion sheet, and a back sheet covering the entire back surface is disposed,
The body fluid diffusion sheet has a width dimension in which a folding margin in the width direction is added in the middle, and the absorbent body has a three-part structure in the vertical direction including a central absorbent body and a pair of side absorbent bodies disposed on both sides thereof. In addition to the absorbent body, each absorbent body is disposed on the upper surface side of the body fluid diffusion sheet at intervals in the width direction, and a liquid-permeable top sheet is disposed on the upper surface side so as to cover the absorbent body of the three-part structure. Place and
A sheet portion where there is no absorber between the central absorber and the pair of side absorbers is folded back toward the body fluid diffusion sheet along the substantially side edge of the central absorber, and the central portion After being inverted and folded at the substantially lower surface position of the absorber, the back sheet is pasted so as to cover the entire back side,
In the front region including the blood drainage portion corresponding portion of the absorbent article, the folding sheet portions are bonded to each other so that the central absorbent body does not lift up, and in the rear region of the absorbent article, An absorbent article, characterized in that the central absorbent body can be lifted with the folding sheet portions non-adhered to each other.   The absorbent article according to any one of claims 1 to 3, wherein the central absorbent body has a shape in which a width is gradually narrowed toward a rear side in a rear region of the absorbent article.   The absorptivity according to any one of claims 1 to 3, wherein the side absorbent body is disposed so that the separation from the central absorbent body gradually increases toward the rear side in the rear region of the absorbent article. Goods.   In the rear side region of the central absorbent body, for lifting that extends to the outside beyond the rear edge of the absorbent article with respect to the back sheet or body fluid diffusion sheet disposed on the back surface side of the central absorbent body The absorbent article in any one of Claims 1-5 by which the member is arrange | positioned.   In the rear region of the central part absorbent body, a finger is placed on the sheet part that is outside the rear edge of the central part absorbent body and is laminated with a liquid-permeable top sheet and a back sheet or body fluid diffusion sheet. The absorbent article according to any one of claims 1 to 5, wherein a cut or hole for hooking is formed.   The picking allowance is formed in the rear-end part of the said absorbent article with the extension part of the sheet | seat on which the liquid-permeable top sheet and the back sheet or the bodily fluid diffusion sheet were laminated | stacked. Absorbent article.

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