JP2009011378A - Absorption pad and absorbent article - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve fitness in a crotch part of an absorption pad arranged on the inner surface of a tape type disposable diaper. <P>SOLUTION: In the absorbent article, on the back surface side of an absorbent 23 on both sides in the width direction of the absorption pad 200, an elongated elastic members 33 are respectively fixed in stretched states so as to extend from a front side part F2 through a crotch part C2 to a rear side part B2 and be swollen to the width direction center side at the crotch part C2. The positions in the crotch part C2 of the elongated elastic members 33 on both sides in the width direction are positioned on the center side in the width direction from the elongated elastic members 13 provided on both sides in the width direction of the tape type disposable diaper 100. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an absorbent pad and an absorbent article having the absorbent pad.

In an absorbent article, an elongated elastic member such as a rubber thread is bonded and fixed in a stretched state in an appropriate position to improve fit to the body. For example, in a tape-type paper diaper, it is possible to improve the fit of the absorbent body to the body by bonding and fixing a plurality of elongated elastic members along the front-rear direction on the back side of the absorbent body on both sides in the width direction of the article. Has been done.
On the other hand, especially in disposable diapers for adults, it is common to use an absorption pad for the purpose of urine absorption on the inner surface in consideration of the replacement frequency, but in such an absorption pad, No elongated elastic member is provided on the back side of the absorber (see, for example, Patent Documents 1 to 5). That is, conventionally, it has been common to press and fit the absorbent pad to the body side using an elastic member provided on the back side of the absorbent body of the diaper.
JP 2004-024308 A JP 2005-287791 A JP 2007-097619 A JP 2007-097627 A JP 2003-088547 A

However, in such a conventional form, there existed a problem that the fitting property of the absorption pad in a crotch part was scarce. It has been found that this problem is particularly noticeable when the wearer is sitting.
Then, the main subject of this invention is improving the fitting property in the crotch part of the absorption pad arrange | positioned at the inner surface of a tape-type disposable diaper.

The present invention that has solved the above problems is as follows.
<Invention of Claim 1>
In the absorbent pad having a front part and a rear part extending to the front side and the rear side of the crotch part, respectively, and an absorbent body made of a fiber assembly arranged on the main body part surrounded by the peripheral part,
Of the back side of the absorbent body in the main body part of the crotch part, an elastic member is provided for enhancing fit to the body only in the range of ± 100 mm in the width direction with reference to the center in the width direction.
Absorbent pad characterized by that.

(Function and effect)
Most tape-type disposable diapers extend from the abdominal part through the crotch part to the dorsal part on the back side of the absorbent body on both sides in the width direction and bulge toward the center in the width direction at the crotch part. The elongated elastic members are fixed in an extended state. In the absorbent pad to be combined with this, even if an elastic member similar to the outer diaper is provided on the back side of the absorbent body, the contraction force of the elastic member of the diaper does not sufficiently act due to the shrinkage of the absorbent pad, so the fit of the crotch part It does not improve much. Moreover, even if the elastic member of the outer diaper is added to the center part in the width direction of the crotch part, the high rigidity of the diaper absorbent body affects the fit property in the center part in the width direction of the pad.
On the other hand, as in the present invention, when the position of the elastic member provided on the absorbent pad is positioned only within a range of ± 100 mm in the width direction with reference to the center in the width direction at least at the crotch portion (the width direction of this range) (There are no elastic members on the outside.) In most combinations of disposable disposable diapers, some or all of the elastic members provided on the absorbent pad are elongated elastic provided on both sides of the diaper in the width direction. It comes to be located in the width direction center side rather than a member. In this case, in the crotch portion, the elongated elastic members on both sides in the width direction of the diaper are fitted to the body at both ends in the width direction of the pad, and the elastic member of the pad is fitted to the body in the width direction center side of the pad. Thus, the entire width direction of the crotch part fits the body well.

<Invention of Claim 2>
In the absorbent pad having a front part and a rear part extending respectively to the front side and the rear side of the crotch part, and an absorbent body made of a fiber assembly interposed in the main body part surrounded by the peripheral part,
An elongated elastic member extends on the back side of the absorbent body on both sides in the width direction of the main body so as to extend from the front part to the rear part through the crotch part and bulge to the center in the width direction at the crotch part. Each is fixed in state,
These elongated elastic members are located only in a range of ± 100 mm in the width direction with respect to the center in the width direction in the crotch portion.
Absorbent pad characterized by that.

(Function and effect)
In this case, in combination with most tape-type disposable diapers, a part or all of the elongated elastic member provided on the absorbent pad is located on the center side in the width direction of the elongated elastic member provided on both sides of the diaper in the width direction. It will be located along. Therefore, in the crotch part, the elongated elastic members on both sides in the width direction of the diaper fit both ends of the pad in the width direction to the body, and the elastic member of the pad fits the body in the center in the width direction of the pad. Since the outer surface shape generated by the contraction of the elastic member of the pad and the inner surface shape generated by the contraction of the elastic member in the diaper are fitted, the entire width direction of the crotch portion of the pad fits the body well, and the pad Misalignment with diapers is less likely to occur.

<Invention of Claim 3>
The absorbent pad according to claim 1 or 2, wherein at least a portion of the absorbent body that overlaps with a position in a crotch portion of the elongated elastic member is penetrated.

(Function and effect)
By providing such a notch, the absorbent pad is easily deformed at the crotch portion, and the fit at the crotch portion is further improved.

<Invention of Claim 4>
The groove | channel which opens to the body side is formed in the part from the said front part or crotch part to the said back part in the width direction center part of the said absorber, The any one of Claims 1-3. Absorption pad.

(Function and effect)
In the present invention, since the fit in the crotch portion is improved, the space for temporarily pooling (reserving) urine between the pad surface and the body is reduced. In this case, if there is a large amount of urination at once, there is a risk of leakage. Therefore, in the present invention, it is preferable to form the groove as described above to improve the absorption rate at the groove forming portion.

<Invention of Claim 5>
The said absorber consists of a lower layer absorber and the upper layer absorber laminated | stacked on it, and an upper layer absorber contains a superabsorbent polymer of the quantity smaller than a lower layer absorber, Any one of Claims 1-4 The absorption pad of Claim 1.

(Function and effect)
In the present invention, since the fit in the crotch portion is improved, the space for temporarily pooling (reserving) urine between the pad surface and the body is reduced. In this case, if there is a large amount of urination at once, there is a risk of leakage. Therefore, in the present invention, it is preferable to improve the absorption rate by employing an absorber having a two-layer structure and reducing the amount of the superabsorbent polymer in the upper layer absorber as compared with the lower layer absorber.

<Invention of Claim 6>
The elongated elastic member is disposed such that the gap between the elongated elastic member on one side in the width direction and the elongated elastic member on the other side in the width direction is the narrowest in the crotch portion, and the elongated elastic member is The absorbent pad according to claim 2, wherein the absorbing pad is a colored member having a color different from that of surrounding members.

(Function and effect)
By combining the arrangement of the elongated elastic member and the coloring of the elongated elastic member, the position of the crotch portion of the pad can be easily visually confirmed, and the pad can be accurately arranged with respect to the diaper. Become. Therefore, the improvement of the fitting property of the crotch part mentioned above comes to be exhibited more reliably.

<Invention of Claim 7>
Having a crotch part, a ventral part extending to the front side of the crotch part and a dorsal part extending to the rear side of the crotch part,
Having an absorber in the part including the crotch part,
Fastening tapes that are detachably connected to the other part protrude from both sides in the width direction of at least one of the ventral part and the back part,
An elongated elastic member is stretched on the back side of the absorbent body on both sides in the width direction so as to extend from the abdominal side portion to the back side portion through the crotch portion and bulge toward the center in the width direction at the crotch portion Each of the tape-type disposable diapers,
The tape-type disposable diaper has a front side portion and a rear side portion that extend to the front side and the rear side of the crotch portion, respectively, and an absorbent body made of a fiber assembly is disposed on the main body portion surrounded by the peripheral edge portion. An absorbent article having an inner surface and an absorbent pad disposed with the crotch portion aligned;
The absorbent pad has a body-fitting property on the center side in the width direction than the elongated elastic member provided on both sides in the width direction of the tape-type disposable diaper on the back side of the absorbent body in the main body of the crotch part. An elastic member is provided to increase the
An absorbent article characterized by the above.

(Function and effect)
The same effects as those of the first aspect of the invention can be achieved.

<Invention of Claim 8>
Having a crotch part, a ventral part extending to the front side of the crotch part and a dorsal part extending to the rear side of the crotch part,
Having an absorber in the part including the crotch part,
Fastening tapes that are detachably connected to the other part protrude from both sides in the width direction of at least one of the ventral part and the back part,
An elongated elastic member is stretched on the back side of the absorbent body on both sides in the width direction so as to extend from the abdominal side portion to the back side portion through the crotch portion and bulge toward the center in the width direction at the crotch portion Each of the tape-type disposable diapers,
The tape-type disposable diaper has a front side portion and a rear side portion that extend to the front side and the rear side of the crotch portion, respectively, and an absorbent body made of a fiber assembly is disposed on the main body portion surrounded by the peripheral edge portion. An absorbent article having an inner surface and an absorbent pad disposed with the crotch portion aligned;
The absorbent pad is elongated on the back side of the absorbent body on both sides in the width direction of the main body so as to extend from the front part to the rear part through the crotch part and bulge to the center in the width direction at the crotch part. Each of the elongated elastic members on both sides in the width direction is provided on both sides in the width direction of the tape-type disposable diaper. It is located in the width direction center side than the elongated elastic member made,
An absorbent article characterized by the above.

(Function and effect)
The same effects as those of the second aspect of the invention can be achieved.

  As described above, according to the present invention, there are advantages such as improved fit in the crotch portion of the absorbent pad arranged on the inner surface of the tape-type disposable diaper.

  Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings. The term “groin” in the terminology of the present invention means a part that corresponds to the body's crotch during use, and in most products, it is the central part in the front-rear direction and the part in the vicinity of the front and rear. Specifically, in the case of a product for adults, the range is ± 150 mm with respect to the center in the front-rear direction of the product. Further, “abdominal part” and “front part” mean a part in front of the crotch part, and “back part” and “rear part” mean a part behind the crotch part.

(About tape-type disposable diapers)
1 to 6 show an example 100 of a tape-type disposable diaper according to the present invention. The disposable diaper 100 includes an inner surface of an impervious backsheet 1 having an outer sheet 12 laminated on the outer surface, and a transparent material. The absorber 3 is interposed between the liquid top sheet 2.

As the liquid-impermeable back sheet 1, in addition to a polyethylene film or the like, a sheet having moisture permeability can be used without impairing water shielding from the viewpoint of preventing stuffiness. This water-impervious / breathable sheet is a microporous sheet obtained by, for example, melt-kneading an inorganic filler in an olefin resin such as polyethylene or polypropylene to form a sheet, and then stretching in a uniaxial or biaxial direction. Can be used. The weight per unit area of the backsheet 1 is preferably 13 to 40 g / m ² , and the thickness is preferably 0.01 to 0.1 mm.

Various nonwoven fabrics can be used as the exterior sheet 12. As the material fiber constituting the nonwoven fabric, synthetic fibers such as polyethylene or polypropylene, synthetic fibers such as polyester and amide, recycled fibers such as rayon and cupra, and natural fibers such as cotton can be used. The fabric basis weight of the nonwoven fabric used for the exterior sheet 12 is preferably 13 to 30 g / m ² , and the thickness is preferably 0.05 to 1 mm.

As the liquid-permeable top sheet 2, a perforated or non-porous nonwoven fabric or a perforated plastic sheet is used. As the material fiber constituting the nonwoven fabric, synthetic fibers such as polyethylene or polypropylene, synthetic fibers such as polyester and amide, recycled fibers such as rayon and cupra, and natural fibers such as cotton can be used. The basis weight of the nonwoven fabric used for the liquid-permeable top sheet 2 is preferably 15 to 30 g / m ² , and the thickness is preferably 0.05 to 1 mm.

As the absorbent body 3, it is possible to use a laminate of pulp fibers, an aggregate of filaments such as cellulose acetate, or a nonwoven fabric, and a mixture obtained by mixing and fixing a superabsorbent polymer as necessary. . Moreover, the absorber 3 can be wrapped with crepe paper (not shown) as needed. Moreover, the shape of the absorber 3 can be determined as appropriate, but in addition to the hourglass shape as illustrated, a shape that extends from the front side to the rear side of the crotch portion, such as a rectangle, is preferable. It is desirable that the basis weight of the absorbent 4 is about 100 to 500 g / m ² and the thickness is about 1 to 15 mm. The basis weight of the highly water-absorbent resin is preferably about 0 to 300 g / m ² . If the content of the superabsorbent resin is too small, sufficient absorbability cannot be provided, and if it is too large, the entanglement between the pulp fibers is lost, and twisting or cracking is likely to occur.

  The liquid-impermeable back sheet 1 extends outward from the periphery of the absorber 3 and has a substantially rectangular shape. On the inner surface of the laterally extending portion of the liquid-impervious backsheet 1, a portion 4x on the outer side in the width direction of the barrier sheet 4 is attached over the entire front-rear direction, thereby forming a side flap portion SF where the absorber 3 does not exist Yes. A portion 4c on the center side in the width direction of the barrier seat 4 extends to the top sheet 2, and an elongated elastic member 4G is stretched along the front-rear direction at the end on the center side in the width direction. It is fixed with a melt adhesive or the like. As the elongated elastic member 4G and the elongated elastic member 13 described later, styrene rubber, olefin rubber, urethane rubber, ester rubber, polyurethane, polyethylene, polystyrene formed in a thread shape, a string shape, a belt shape, or the like. Commonly used materials such as styrene butadiene, silicon, and polyester can be used.

  The liquid-permeable top sheet 2 has an hourglass shape that is slightly larger than the absorbent body 3, and a portion that extends slightly outward from the side edge of the absorbent body 3 is between the barrier sheet 4 and the liquid-impermeable back sheet 1. It is interposed and fixed to the liquid-impermeable backsheet 1 side by a hot melt adhesive or the like. This fixed portion is shown as a dot pattern in FIGS. As the material for the barrier sheet 4, a plastic sheet or a melt blown nonwoven fabric can be used. However, in terms of touch to the skin, a nonwoven fabric that is water-repellent treated with silicon or the like is preferably used.

  When the outer surface of the liquid-impermeable back sheet 1 is covered with a nonwoven fabric, the exterior nonwoven fabric is extended outward from the periphery of the absorber 3 in place of the liquid-impermeable back sheet 1 and the side portion of the barrier sheet 4 At the same time, the side flap portion SF in which the absorber 8 does not exist can be configured. In this case, the liquid-impermeable back sheet 1 can be formed in the same shape as the top sheet 2 without extending to the side flap portion SF.

  As shown in FIGS. 3 and 4, both barrier sheets 4, 4 are not attached to and detached from the inner surface of the article (the top sheet 2 surface and the back sheet 1 inner surface in the illustrated embodiment) in the widthwise outer portion 4 x throughout the entire front-rear direction. The portion 4c on the center side in the width direction is fixed so as not to be attached to and detached from the inner surface of the article (the surface of the top sheet 2 in the illustrated embodiment) at both ends in the front-rear direction, and between the both ends in the front-rear direction. It is not fixed to the inner surface (the top sheet 2 surface in the illustrated form). As shown in FIG. 4, the non-fixed portion is a portion that becomes a barrier portion that can stand up with respect to the inner surface of the article (the surface of the top sheet 2 in the illustrated embodiment), and the rising base end 4 b has a width in the barrier sheet 4. It is located at the boundary between the fixed portion 4x on the outer side in the direction and the inner portion 4c.

  At both ends in the front-rear direction of the disposable diaper 100, the liquid-impervious backsheet 1 and the liquid-permeable topsheet 2 are respectively extended to the front and rear sides of the absorbent body 3, and the end flap portions where the absorbent body 3 is not present. In the end flap portion EF on the back side, a plurality of yarn elastic members 7, 7... In the illustrated example are arranged along the width direction. As the thread-like elastic member 7, materials such as styrene rubber, olefin rubber, urethane rubber, ester rubber, polyurethane, polyethylene, polystyrene, styrene butadiene, silicon, and polyester that are usually used can be used.

  In addition, the fastening tapes 5 and 5 are attached to both side flap portions SF in the waistline portion of the back side B1 so as to protrude sideways, and in the width direction on the waistline surface of the stomach side F1 of the disposable diaper 100. A front target tape 6 is attached along the front target tape 6, and the disposable diaper 100 is attached to the body by fastening the joining piece 8 a of the fastening tape 5 to the front target tape 6.

The fastening tape 5 in the illustrated example is attached by attaching the inner end side of one fastening base sheet 8 to the disposable diaper 100 side, and extends from the outer edge to the tip side and is laterally extended in two steps. Projecting joining pieces 8a, 8a are formed, and a perforation 10 is provided from the outer edge toward the inside and along the horizontal direction with respect to the fastening base sheet 8 portion between the joining pieces 8a, 8a. However, the present invention is not limited to this, and a known fastening tape can be used. Although various sheet materials can be used as the fastening base sheet 8, it is preferable to use a single-layer or multi-layer nonwoven fabric having a basis weight of 40 to 80 g / m ² . The processing method is preferably spunbond having excellent strength characteristics. On the inner surface side (liquid permeable surface sheet 2 side) of the joining pieces 8a and 8a, hook tapes (male materials of mechanical fasteners) 9 and 9 each having a large number of hook-shaped protrusions are attached, and the hook-shaped protrusions can be attached and detached. It can be joined to a front target tape (female material of a mechanical fastener) 6 having a surface that is hooked to the front.

  Characteristically, on the back side of the absorbent body 3 on both sides in the width direction of the diaper 100, a plurality of pieces extend so as to extend from the abdominal part F1 to the back part B1 and bulge toward the center in the width direction at the crotch part C1. Each of the elongated elastic members 13 is provided. In the present embodiment, the elastic member 13 is fixed between the exterior sheet 12 and the back sheet 1 using an adhesive, but may be fixed to the inner surface of the back sheet 1.

  Particularly in the present embodiment, in the side flap portion SF, a plurality (five in the illustrated example) of outer elastic members 13s extending along a constricted portion formed so as to extend around the legs, the ventral side, and the back side. A plurality of (three in the illustrated example) inner elastic members 13i having a start end and a terminal end on the side flap portion SF on the side and bulging and extending inward to a portion overlapping the absorber in the crotch portion are provided. ing.

  The inner elastic member 13i changes its position outward in the width direction as it is separated from the crotch portion C1, and the inclination of the change (relative to the front-rear direction) extends to the back side rather than the portion extending to the ventral side. It is steeper, and after approaching the outer elastic member 13s, it extends along the outer elastic member at regular intervals.

  The minimum width direction interval d1 between the inner elastic member 13i on one side in the width direction and the inner elastic member 13i on the other side in the width direction in the crotch portion C1 can be determined as appropriate, but is preferably 10 to 150 mm. If the distance d1 is too narrow, the area of the absorbent pad 200, which will be described later, easily overlaps or overlaps with the elastic member 33, and if it is too wide, the area of the absorption pad 200 does not overlap or overlaps with both sides in the width direction. In any case, the effect of improving fit may be poor.

  As the elongated elastic members 13s and 13i, synthetic or natural rubber having an appropriate shape such as a thread shape, a string shape, or a belt shape can be used. When synthetic rubber is used, it is preferable to provide a rubber having a thickness of about 400 to 1200 dtex with an elongation of about 180 to 300%. Moreover, it is preferable to arrange about 1 to 10 outer elastic members 13s at intervals of 2 to 10 mm, and it is preferable to arrange about 1 to 10 inner elastic members 13i at intervals of 2 to 15 mm.

(About absorption pad)
7-10 show an example absorbent pad 200 according to the present invention. The absorbent pad 200 is assumed to be used by being laid on the inner surface of the disposable diaper 100, and has a crotch portion C2, and a front side portion F2 and a back side portion B2 extending on both front and rear sides thereof. . The dimensions of each part can be determined as appropriate. For example, the total length (length in the front-rear direction) L1 is about 350 to 700 mm, and the total width W1 is about 130 to 400 mm (however, narrower than the width of the absorbent surface of the diaper). In this case, the front-rear direction length of the crotch part C2 is about 10 to 150 mm, the front-rear direction length of the ventral part F2 is about 50-350 mm, and the front-rear direction length of the back part B2 is about 50-350 mm. can do.

  The absorbent pad 200 has a basic structure in which an absorber 23 is interposed between an inner surface of a liquid-impermeable back sheet 21 having an outer sheet 32 laminated on the outer surface and a liquid-permeable top sheet 22. .

  As the absorbent body 23, it is possible to use a laminate of pulp fibers, an aggregate of filaments such as cellulose acetate, or a nonwoven fabric, and a mixture obtained by mixing and fixing a superabsorbent polymer as necessary. . If necessary, the absorber 23 can be wrapped with crepe paper (not shown). Moreover, the shape of the absorber 23 can be set to an appropriate shape such as a strip shape in which the front portion is relatively wider than the rear portion, a rectangular shape, or a trapezoidal shape. The illustrated absorber 23 has a two-layer structure including a lower layer absorber 23B and an upper layer absorber 23U laminated thereon, but may have a single layer structure. In the case of a two-layer structure, the two layers 23U and 23B may be the same size, but an appropriate configuration is adopted such that the upper-layer absorber 23U is small in both length and width and positioned in the front as shown in the figure. be able to.

Although the fiber basis weight and the basis weight of the absorbent polymer in the absorbent body 23 can be determined as appropriate, the fiber basis weight is preferably about 100 to 600 g / m ^2, and the basis weight of the absorbent polymer is about 0 to 400 g / m ^2. It is preferable to do this. If a two-layer structure as shown embodiment, the lower fiber basis weight of the absorbent body 23B, for example 80 - 400 g / m ² approximately, the basis weight of the superabsorbent polymer can be, for example, 50 to 400 g / m ² approximately, the upper layer fiber basis weight of the absorbent body 23U is for example 80~300g / m ² approximately, the basis weight of the superabsorbent polymer can be, for example, 10 to 200 g / m ² approximately.

  On the back surface side of the absorbent body 23, a liquid-impermeable back sheet 21 is provided so as to protrude slightly from the peripheral edge of the absorbent body 3. As the liquid-impermeable back sheet 21, in addition to a polyethylene film or the like, a sheet having moisture permeability can be used without impairing water shielding from the viewpoint of preventing stuffiness. This water-impervious / breathable sheet is a microporous sheet obtained by, for example, melt-kneading an inorganic filler in an olefin resin such as polyethylene or polypropylene to form a sheet, and then stretching in a uniaxial or biaxial direction. Can be used.

  Further, the outer surface of the liquid-impermeable back sheet 21 is covered with an exterior sheet 32 made of a nonwoven fabric, and this exterior sheet 32 protrudes outside the periphery of the back sheet 21 with a predetermined protrusion width. Yes. Various nonwoven fabrics can be used as the exterior sheet 32. As the material fiber constituting the nonwoven fabric, synthetic fibers such as polyethylene or polypropylene, synthetic fibers such as polyester and amide, recycled fibers such as rayon and cupra, and natural fibers such as cotton can be used.

  The surface side of the absorber 23 is covered with a liquid-permeable top sheet 22. In the illustrated form, the absorber 23 partially protrudes from the side edge of the top sheet 22, but the width of the top sheet 22 can be widened so that the side edge of the absorber 3 does not protrude. As the top sheet 22, a perforated or non-porous nonwoven fabric or a perforated plastic sheet is used. As the material fiber constituting the nonwoven fabric, synthetic fibers such as polyethylene or polypropylene, synthetic fibers such as polyester and amide, recycled fibers such as rayon and cupra, and natural fibers such as cotton can be used.

  At both ends of the absorbent pad 200 in the front-rear direction, the exterior sheet 12 and the liquid-permeable top sheet 1 are attached to the front and rear ends of the absorbent body 3 so as to extend to both front and rear sides, and the end flap portions EF where the absorbent body 23 is not present. Is formed. On both sides of the absorbent pad 200, the exterior sheet 32 extends outward from the side edge of the absorber 23. A portion 24x on the outer side in the direction is affixed over the entire front-rear direction and constitutes a side flap portion SF where the absorber 23 does not exist. These bonded portions are shown as dotted patterns in FIGS. 9 and 10, and can be formed by hot melt adhesive, heat sealing, or ultrasonic sealing. These end flap part EF and side flap part SF comprise the peripheral part of this invention, and the part enclosed by these makes | forms the main-body part of this invention. When the exterior sheet 32 is not provided, the liquid-impervious backsheet 21 can be extended to the side flap part SF instead of the exterior sheet 32 to form the outer surface side of the side flap part SF.

  As the material for the barrier sheet 24, a plastic sheet or a melt-blown nonwoven fabric can be used. However, in terms of touch to the skin, a nonwoven fabric that is water-repellent treated with silicon or the like is preferably used.

  A portion 24c on the center side in the width direction of the barrier seat 24 extends to the top sheet 22, and an elongated elastic member 24G is stretched along the front-rear direction at the end on the center side in the width direction. It is fixed with a melt adhesive or the like. As the elongated elastic member 24G, styrene rubber, olefin rubber, urethane rubber, ester rubber, polyurethane, polyethylene, polystyrene, styrene butadiene, silicon, polyester, etc., which are formed in a thread shape, a string shape, a belt shape, or the like. Ordinarily used materials can be used.

  Further, the barrier sheets 24, 24 are fixed by being bonded to the inner surface of the article (in the illustrated form, the surface of the top sheet 22 and the outer surface of the exterior sheet 32) across the entire front and rear direction, and the width direction center side. Portion 24c is bonded and fixed to the inner surface of the article (the surface of the top sheet 22 in the illustrated embodiment) at both ends in the front-rear direction, and is fixed to the inner surface of the article (the surface of the top sheet 22 in the illustrated embodiment) between both ends in the front-rear direction. It has not been. As shown in FIG. 10, the non-fixed portion is a portion that becomes a barrier portion that can stand up with respect to the inner surface of the article (the surface of the top sheet 22 in the illustrated embodiment), and the standing base end 24 b has a width in the barrier sheet 24. It is located at the boundary between the fixed portion 24x on the outer side in the direction and the inner portion 24c.

  Characteristically, it bulges to the back side of the absorbent body 33 on both sides in the width direction of the main body so as to extend from the abdomen portion F2 to the back portion B2 and to the center in the width direction at the crotch portion C1. Thus, a plurality of elongated elastic members 33 are provided. In this embodiment, the elastic member 33 is fixed between the exterior sheet 32 and the back sheet 31 using an adhesive, but may be fixed to the inner surface of the back sheet 31.

  The position of the elastic member 33 in the crotch portion C2 is, as shown in FIGS. 12 and 13, when the crotch portion C2 is attached to the diaper 100 in the width direction center side with respect to the inner elastic member 13i of the diaper 100. It becomes. The elastic member 33 of the pad 200 may be at least partially positioned on the center side in the width direction with respect to the inner elastic member 13i of the diaper 100. However, as shown in the figure, all of the elastic member 33 is wider than the inner elastic member 13i of the diaper 100. It is preferable to be located on the center side in the direction. When the absorbent pad 200 thus configured is used, both end portions in the width direction of the pad 200 overlapping with the elongated elastic members 13 on both sides in the width direction of the diaper are pressed against the body side in the crotch portion C2, and the elasticity of the pad 200 is obtained. By the member 33, the center side in the width direction of the pad 200 is pressed against the body side.

  The specific passage position of the elastic member 33 in the crotch portion C2 is preferably in the range of ± 100 mm in the width direction with respect to the center in the width direction. If this range is too wide, the elastic member 13 of the diaper 100 may be easily overlapped or the overlapping area may be increased, and the effect of improving fit may be poor. Only fits the body, there is a risk that the fit on both sides in the width direction will be insufficient

  In particular, in the illustrated embodiment, the portion of the elastic member 33 of the pad 200 that extends from the crotch portion C2 to the ventral side F2 is substantially the same shape (substantially) with a substantially constant interval along the inner elastic member 13i of the diaper 100. Straight line). On the other hand, the portion of the elastic member 33 of the pad 200 that extends to the back side B2 includes a portion that extends in a curved shape that goes around the width direction outside of the portion corresponding to the swelling of the buttocks, and a longitudinal direction from the rear end thereof. And a portion extending linearly along. As a result, the outer surface shape generated by the contraction of the elastic member 33 of the pad 200 and the inner surface shape generated by the contraction of the elastic member 13 in the diaper 100 are fitted, so that the entire width direction of the crotch portion C2 of the pad is attached to the body. It fits well, and the displacement between the pad 200 and the diaper 100 is less likely to occur.

  As the elongated elastic member 33 of the absorbent pad 200, synthetic or natural rubber having an appropriate shape such as a thread shape, a string shape, or a belt shape can be used. When synthetic rubber is used, it is preferable to provide a rubber having a thickness of about 400 to 1200 dtex with an elongation of about 180 to 300%. Further, it is preferable that about 1 to 5 elongated elastic members 33 of the absorbent pad 200 are arranged in parallel at intervals of 2 to 10 mm. Further, as shown in the figure, when the gap between the elongated elastic member 33 on one side in the width direction and the elongated elastic member 33 on the other side in the width direction is the narrowest in the crotch portion C2, the elongated elastic member When 33 is a colored member having a different color from the surrounding members (the normal diaper is white, a clean color such as blue or green is preferable), the position of the crotch portion C2 of the pad 200 can be easily recognized It is preferable because the pad 200 can be accurately arranged with respect to the diaper 100.

  Further, in order to further improve the fit in the crotch portion C2 of the absorbent pad 200, as shown in FIG. 11, at least a portion 23h overlapping the position of the elastic member 33 in the crotch portion C2 of the absorber 23. It is one preferable form that penetrates through. Thereby, the softness | flexibility of the absorber 23 increases and the improvement effect of the fitting property by the elastic member 33 provided in the absorption pad 23 becomes still more. The size and shape of the punched-through portion 23h can be determined as appropriate. However, in consideration of the fit at the time of sitting, from the portion overlapping the position in the crotch portion C2 of the elastic member 33 on each side in the width direction as illustrated. It is preferable to pierce the belt to the front part. In this case, the punching width W3 is preferably about 5 to 50 mm, and the punching length L3 is preferably about 50 to 300 mm.

  In addition, in the present invention, the fit in the crotch portion is improved, so that the space for temporarily pooling (reserving) urine between the pad surface and the body is reduced, and if there is a large amount of urination at once, leakage occurs. May lead to Therefore, as shown in FIG. 7 and FIG. 10, a groove 23d that opens to the body side is formed in a portion from the front side portion F2 or the crotch portion C2 to the rear side portion B2 in the central portion in the width direction of the absorber 23. It is preferable to improve the absorption rate in the groove 23d forming portion. The groove in the illustrated form is formed by a through-hole that penetrates the absorber 23 in the vertical direction. However, in the case of the absorber 23 having a two-layer structure, an upper layer absorber 23U is provided. It can also be formed by providing a pierced part only on the top. Although the dimension of the groove 23d can be determined as appropriate, the width W2 is preferably about 5 to 40 mm, and the length L2 is preferably about 50 to 300 mm.

For the same purpose, it is also a preferable form to adopt a two-layer absorber and to reduce the amount of the superabsorbent polymer of the upper absorber 23U to be lower than that of the lower absorber 23B to improve the absorption rate. . Specifically, the lower the fiber basis weight of the absorbent body 23B is 100 to 400 g / m ² approximately, the basis weight may preferably be 200~350g / m ² about superabsorbent polymer, fiber basis weight of the upper layer absorbent body 23U is 100 ~400g / m ² approximately, the basis weight of the superabsorbent polymer is preferably set to 0 to 200 g / m ² approximately.

(Other forms)
The elastic member in the absorbent pad 200 has a position in the crotch portion C2 in the state where the crotch portion C2 is attached to the diaper 100 with the crotch portion C2 being attached. As long as it is within a range of ± 100 mm in the width direction with respect to the center in the direction, the configuration is not limited to the above. Therefore, for example, as shown in FIG. 14, a plurality of elastic members 34 along the width direction can be provided in the front-rear direction at a predetermined interval.

  The present invention is used when an absorbent pad and a disposable diaper are used in combination.

It is a top view which shows the inner surface side of the expansion | deployment state of a tape-type disposable diaper. It is VV sectional drawing of FIG. It is XX sectional drawing of FIG. It is WW sectional drawing of FIG. It is a principal part enlarged plan view. It is a top view which shows the outer surface side of the expansion | deployment state of a tape-type disposable diaper. It is a top view which shows the inner surface side of the expansion | deployment state of an absorption pad. It is a top view which shows the outer surface side of the expansion | deployment state of an absorption pad. It is YY sectional drawing of FIG. It is ZZ sectional drawing of FIG. It is a top view which shows the outer surface side of the expansion | deployment state of another absorption pad. It is a top view which shows the inner surface side of the expansion | deployment state of a tape-type disposable diaper of the state which attached the absorption pad. It is a top view which shows the outer surface side of the expansion | deployment state of a tape-type disposable diaper of the state which attached the absorption pad. It is a top view which shows the outer surface side of the expansion | deployment state of a tape-type disposable diaper of the state which attached the other absorption pad.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1,21 ... Liquid-impermeable back sheet, 2,22 ... Liquid-permeable top sheet, 3,23 ... Absorber, 4,24 ... Barrier sheet, 5 ... Fastening tape, 6 ... Target tape, 7 ... Elastic member, 8 ... base sheet, 9 ... hook tape, 10 ... perforation, 12, 32 ... exterior sheet, 13i, 13s, 33, 34 ... elastic member, 100 ... tape-type disposable diaper, 200 ... absorbent pad.

Claims (8)

In the absorbent pad having a front part and a rear part extending to the front side and the rear side of the crotch part, respectively, and an absorbent body made of a fiber assembly arranged on the main body part surrounded by the peripheral part,
Of the back side of the absorbent body in the main body part of the crotch part, an elastic member is provided for enhancing fit to the body only in the range of ± 100 mm in the width direction with reference to the center in the width direction.
Absorbent pad characterized by that. In the absorbent pad having a front part and a rear part extending respectively to the front side and the rear side of the crotch part, and an absorbent body made of a fiber assembly interposed in the main body part surrounded by the peripheral part,
An elongated elastic member extends on the back side of the absorbent body on both sides in the width direction of the main body so as to extend from the front part to the rear part through the crotch part and bulge to the center in the width direction at the crotch part. Each is fixed in state,
These elongated elastic members are located only in a range of ± 100 mm in the width direction with respect to the center in the width direction in the crotch portion.
Absorbent pad characterized by that.   The absorbent pad according to claim 1 or 2, wherein at least a portion of the absorbent body that overlaps with a position in a crotch portion of the elongated elastic member is penetrated.   The groove | channel which opens to the body side is formed in the part from the said front part or crotch part to the said back part in the width direction center part of the said absorber, The any one of Claims 1-3. Absorption pad.   The said absorber consists of a lower layer absorber and the upper layer absorber laminated | stacked on it, and an upper layer absorber contains a superabsorbent polymer of the quantity smaller than a lower layer absorber, Any one of Claims 1-4 The absorption pad of Claim 1.   The elongated elastic member is disposed such that the gap between the elongated elastic member on one side in the width direction and the elongated elastic member on the other side in the width direction is the narrowest in the crotch portion, and the elongated elastic member is The absorbent pad according to claim 2, wherein the absorbing pad is a colored member having a color different from that of surrounding members. Having a crotch part, a ventral part extending to the front side of the crotch part and a dorsal part extending to the rear side of the crotch part,
Having an absorber in the part including the crotch part,
Fastening tapes that are detachably connected to the other part protrude from both sides in the width direction of at least one of the ventral part and the back part,
An elongated elastic member is stretched on the back side of the absorbent body on both sides in the width direction so as to extend from the abdominal side portion to the back side portion through the crotch portion and bulge toward the center in the width direction at the crotch portion Each of the tape-type disposable diapers,
The tape-type disposable diaper has a front side portion and a rear side portion that extend to the front side and the rear side of the crotch portion, respectively, and an absorbent body made of a fiber assembly is disposed on the main body portion surrounded by the peripheral edge portion. An absorbent article having an inner surface and an absorbent pad disposed with the crotch portion aligned;
The absorbent pad has a body-fitting property on the center side in the width direction than the elongated elastic member provided on both sides in the width direction of the tape-type disposable diaper on the back side of the absorbent body in the main body of the crotch part. An elastic member is provided to increase the
An absorbent article characterized by the above. Having a crotch part, a ventral part extending to the front side of the crotch part and a dorsal part extending to the rear side of the crotch part,
Having an absorber in the part including the crotch part,
Fastening tapes that are detachably connected to the other part protrude from both sides in the width direction of at least one of the ventral part and the back part,
An elongated elastic member is stretched on the back side of the absorbent body on both sides in the width direction so as to extend from the abdominal side portion to the back side portion through the crotch portion and bulge toward the center in the width direction at the crotch portion Each of the tape-type disposable diapers,
The tape-type disposable diaper has a front side portion and a rear side portion that extend to the front side and the rear side of the crotch portion, respectively, and an absorbent body made of a fiber assembly is disposed on the main body portion surrounded by the peripheral edge portion. An absorbent article having an inner surface and an absorbent pad disposed with the crotch portion aligned;
The absorbent pad is elongated on the back side of the absorbent body on both sides in the width direction of the main body so as to extend from the front part to the rear part through the crotch part and bulge to the center in the width direction at the crotch part. Each of the elongated elastic members on both sides in the width direction is provided on both sides in the width direction of the tape-type disposable diaper. It is located in the width direction center side than the elongated elastic member made,
An absorbent article characterized by the above.

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