JP2006239162A - Absorbent article - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an absorbent article, which does not affect the back part or front part even if either of the front part or back part is deformed, is excellent in fitting, does not leak fluid easily, and provides comfortable fit. <P>SOLUTION: The absorbent article 1 is used as a sanitary pad and provides a liquid permeable front sheet, a liquid impermeable back sheet and a liquid holding absorbing member laid between both the front and back sheets, and is formed substantially vertically long. The absorbent article has a high center part projecting convexly which is narrower than the width of the absorptive article on the side where skin is contacted. As shown in Figure, the high center part includes front high center part 2 and back high center part 3 which are provided on the front part 11 and the back part 12 of the absorbent article respectively. Between the front high center part 2 and the back center part 3, the folding start point 4 which prevents the deformation of the front part 11 or the back part 12 from affecting each other is provided. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to absorbent articles such as sanitary napkins and incontinence pads.

  In an absorbent article such as a sanitary napkin, in order to improve adhesion to the body and leakage prevention, it is known that the absorbent body protrudes from the central part or the central part to the buttocks (Patent Documents 1 to 3). 3). In Patent Document 1, it is disclosed that a cushion layer is interposed in the rear in order to prevent leakage of bodily excrement by being brought into close contact with the groove of the buttocks and to provide an absorbent article that is soft against the wearer's skin. Yes. Patent Document 2 discloses forming a plurality of convex portions such as a convex portion continuous in the front-rear direction and a convex portion surrounding the convex portion in order to prevent side leakage and rear leakage. Patent Document 3 has a form that matches the shape of the wearer's body and maintains contact so that menstruation can be easily captured at the time of discharge, or the influence of movement between the wearer's body and underwear In order to absorb water, forming a hill portion having a specific range of thickness and deflection resistance is disclosed.

JP 2003-24372 A Japanese Utility Model Publication No. 7-12120 JP-T 8-5059797

  In the absorbent article described above, when deformation occurs in the front part or the rear part of the absorbent article that is in contact with the wearer's skin in conjunction with the movement of the wearer's body, the deformation is caused in the rear part or the front part. As a result, the entire absorbent article was deformed. If such deformation linked to the movement of the wearer's body is not resolved, it becomes “smooth”, which tends to adversely affect the fit, leakage prevention, and wearing feeling of the absorbent article. In particular, in an absorbent article having a middle-high part that is narrower than the absorbent article main body and extends in the front-rear direction, various deformations are easily transmitted through the middle-high part, and the deformation is easily fixed, so that it is more likely to be “twisted”. Susceptible to adverse effects.

  Therefore, the object of the present invention is that even if a deformation occurs in one of the front part or the rear part of the absorbent article, the occurrence of such a deformation does not affect the other, the fitting property is high, and leakage occurs. An object of the present invention is to provide an absorbent article which is difficult and has a comfortable wearing feeling.

  The present invention is an absorbent article comprising a top sheet, a back sheet, and an absorbent body interposed between both sheets, wherein the absorbent body is narrower than the absorbent body on the skin contact surface side. And has a middle and high part projecting in a convex shape, and the middle and high part consists of a front middle and high part and a rear middle and high part that are separately provided on the front part and the rear part of the absorbent article, Achieving the above-mentioned object by providing an absorbent article provided with a bending start point that does not affect the deformation of the front part or the rear part between the front middle-high part and the rear middle-high part. It is.

  In the absorbent article of the present invention, the middle-high part is composed of a front middle-high part and a rear middle-high part that are separately provided at the front part and the rear part of the absorbent article, respectively, and is provided with a bending origin. Therefore, even if deformation occurs in the front part (or the rear part in which the rear middle high part is provided) where the front middle high part in contact with the wearer's skin is provided, The rear part (or front part) is not affected. Therefore, the absorbent article of the present invention has a high fit, is difficult to leak, and has a comfortable wearing feeling. Moreover, since the middle-high part is divided into the front middle-high part and the rear middle-high part, the wearing feeling of the absorbent article is enhanced.

Hereinafter, preferred embodiments of the absorbent article of the present invention will be described with reference to the drawings.
The absorbent article 1 of the first embodiment is a sanitary napkin, and includes a liquid-permeable top sheet, a liquid-impermeable back sheet, and a liquid-retaining absorbent interposed between the two sheets. Therefore, it is formed vertically long.
The absorbent body has, on the skin contact surface side, a middle-high portion that is narrower than the absorbent body and protrudes in a convex shape, and the middle-high portion, as shown in FIG. The front part 11 and the rear part 12 are respectively provided with a front middle high part 2 and a rear middle high part 3, which are respectively provided between the front middle high part 2 and the rear middle high part 3. The bending start point 4 is provided so that the deformations 12 do not affect each other.

  The absorbent article 1 according to the first embodiment will be further described. The absorbent body includes a lower layer absorbent covering substantially the entire absorbent article 1 and an upper layer absorbent provided on the lower layer absorbent. The upper layer absorber forms the middle and high portions 2 and 3.

  Since the middle and high parts are divided into the front middle and high parts 2 and the rear middle and high parts 3, respectively, from the viewpoint of functions such as absorbability and fit, they can be formed in different shapes or materials.

The front middle high part 2 and the rear middle high part 3 of the absorbent article 1 according to the first embodiment have different shapes in plan view.
The shape in plan view of both end portions 21 and 22 in the longitudinal direction of the front middle high portion 2 is a convex curve shape, and the shape of both side edges in the longitudinal direction of the front middle high portion 2 is a parallel linear shape. . The rear middle high part 3 has a rhombus shape that is located on the center line whose major axis extends in the longitudinal direction.
The shape of the front middle-high part 2 is formed with emphasis on absorbability. The width of the front middle-high part 2 is substantially constant over the longitudinal direction, and has a shape in which as many of the upper layer absorbent bodies as possible are arranged. For such purposes, an elliptical or rectangular shape is also preferable.
On the other hand, the shape of the rear middle-high part 3 is formed with more emphasis on fit, and is preferably formed in a tapered shape toward the front. In the first embodiment, both end portions 31 and 32 in the longitudinal direction of the rear middle-high portion 3 each have a tapered shape, and both have a long tapered shape. Thus, from the viewpoint of improving the fit, the shape of the rear end portion 32 is also preferably a triangular shape that becomes thinner toward the rear end, and the shape that the thickness becomes thinner toward the rear end portion 32.
As described above, the shape of each of the front middle-high portion 2 and the rear middle-high portion 3 in plan view is different, so that the effect of preventing the influence of mutual deformation between the front portion 11 and the rear portion 12 is enhanced. ing. In particular, when the shape of the rear middle high portion 3 is formed in a tapered shape toward the front, the fit and the prevention of the influence of deformation are further improved.

The topsheet and the absorbent body are joined by heat embossing, and the bending start point 4 is formed by a recess formed by the embossing.
As shown in FIG. 1, the concave portion 4 as a bending starting point is arranged in such a manner that a deeply formed portion and a shallowly formed portion are alternately arranged at the center portion in the width direction between the front middle high portion 2 and the rear middle high portion 3. It is a continuous line. The bending start point 4 is provided in a convex “<” shape toward the rear middle high part 3. In FIG. 1, only deep depressions are shown in black (hereinafter the same applies to FIGS. 2 to 8).

  The function of the recess 4 that is the starting point of bending will be described below. The absorbent article 1 is provided with a slip-off adhesive material (not shown) on the underwear side of the back sheet, and is fixed and attached to the crotch part of the underwear (shorts, etc.) via the slip-off adhesive material. The The front part 11 of the absorbent article 1 is brought into contact with the body fluid excretion part and the rear part 12 is brought into contact with the hip part, so that the absorbent article 1 is attached to the wearer. The absorbent article 1 is deformed in conjunction with the movement of the wearer's body, but the front part 11 and the rear part 12 are each independently movable with the bending start point 4 as a boundary, and the wearer's body Follows and fits.

  In the absorbent article 1 according to the first embodiment, the concave portion 4 serving as a bending starting point is provided between the front middle-high portion 2 and the rear middle-high portion 3, and further, the front middle-high portion 2 and the rear middle-high portion are provided. The portion 3 is provided so as to extend symmetrically with respect to a center line extending in the longitudinal direction. Hereinafter, this continuous concave portion other than between the front middle high portion 2 and the rear middle high portion 3 is referred to as a round emboss 5.

  As for the recessed part 4 and the round embossing 5 used as the bending starting points of the absorbent article 1, the deep dent intermittently is provided every other piece in the continuous strip | belt-shaped part (groove part) shown in FIG. The concave portion 4 as a folding starting point provided between the front middle high portion 2 and the rear middle high portion 3 is the entire belt-like portion, but in FIG. The same applies to FIGS.

  The absorbent article 1 has a round emboss 5, and the portion surrounded by the round emboss 5 is such that the deformation of the front part 11 and the rear part 12 described above is difficult to be transmitted, and the absorbent body by round embossing. By improving the rigidity, the surface shape is stabilized. As shown in FIG. 1, each of the front middle-high portion 2 and the rear middle-high portion 3 of the absorbent article 1 is surrounded by a round emboss 5 and a concave portion 4 that is a bending start point. The concave portion 4 serves as a folding starting point and also serves as a part of the round embossing 5.

As shown in FIG. 1, the absorbent article 1 according to the first embodiment is further provided with a rear middle high portion 3 and a rear middle high portion 3, which are embosses other than the concave portion 4 and the round embossed portion 5 that are bending starting points. Is provided so as to be connected to the recess 4 in line symmetry with respect to the center line extending in the longitudinal direction of the absorbent article 1.
The secondary round emboss 6 is also provided with deep depressions intermittently every other piece in the continuous band-like portion of FIG. 1 (hereinafter the same applies to FIG. 2). Such round embossing 5 and sub-round embossing 6 stabilize the surface shape and increase the liquid leakage prevention effect.

  As shown in FIG. 1, a pair of three-dimensional gather sheets 7 and 7 are provided on both side edges of the absorbent article 1. Each of the pair of three-dimensional gather sheets 7, 7 is provided from the front end portion of the absorbent article 1 to both side edges of the rhomboid columnar short diameter of the rear middle high portion 3.

The upper-layer absorber forming the front middle-high portion 2 is formed from pulp fibers, and the upper-layer absorber forming the rear middle-high portion 3 is formed from synthetic fibers. This is because the front middle-high part 2 is formed with emphasis on absorbability and the rear middle-high part 3 is formed with emphasis on fit.
As the pulp fiber forming the upper layer absorbent body of the front middle high part 2 and the synthetic fiber forming the upper layer absorbent body of the rear middle high part 3, the same one as a normal absorbent article is used. be able to.
Moreover, as long as it is a range which does not impair the absorptivity of the front middle high part 2, and the fitting property of the back middle high part 3, you may mix and use the said pulp-type fiber and the said synthetic fiber as needed.

  Here, a synthetic fiber means what was formed from materials other than natural fibers, such as a pulp and cotton, and specifically, the single fiber formed from resin, such as polyethylene, a polypropylene, polyester, and polylactic acid. And various composite fibers such as core-sheath structure fibers and semi-synthetic fibers such as rayon. In addition, the synthetic fiber of the rear middle high part 3 is preferably made of a non-woven fabric by a binder or a binder part of a composite fiber, such as a tow fiber of resin such as polyethylene, polypropylene, polyester or polylactic acid, or an acetated rayon tow. It is also preferable to use a web / nonwoven fabric in which the fibers are crimped to increase the bulk. In any case, it is preferably hydrophilic.

  As the top sheet, the back sheet, the lower layer absorbent body, and the pair of three-dimensional gather sheets 7 and 7 of the absorbent article 1 of the first embodiment, the same ones as those of a normal absorbent article can be used.

In particular, the surface sheet is preferably made of a stretchable material in order to prevent kinking. This is because, when the top sheet that is in direct contact with the wearer's skin has elasticity, deformation of the absorber and the back sheet can be suppressed.
Examples of the fiber sheet having stretchability include a nonwoven fabric in which a number of embossed portions are scattered in a discontinuous pattern mainly composed of latent crimpable fibers.

  According to the absorbent article 1 of the first embodiment, since the plurality of the embosses as the bending starting points 4 are intermittently provided with deep depressions, the absorbent article 1 in contact with the wearer's skin. The front part provided with the front middle-high part 2 or the rear part provided with the rear middle-high part 3 is linked to the movement of the wearer's body, starting from any one of the embosses at a close distance. Can be moved separately. For this reason, the absorbent article 1 of 1st Embodiment is improving the effect which prevents the influence of a mutual deformation | transformation between the front part 11 and the back part 12, is hard to leak, and inhibits a wearer's movement. Therefore, it has a comfortable feeling. Moreover, since the said middle-high part is divided into the front middle-high part 2 and the back middle-high part 3, the adhesiveness (fit property) of the absorbent article 1 is improved.

  Since each of the front middle high part 2 and the rear middle high part 3 is provided with the round emboss 5, the leakproof property is enhanced. Moreover, since the back middle high part 3 is also provided with the sub-round embossing 6, the leak-proof property is further improved.

  Next, absorbent articles 1 according to second to eighth embodiments of the present invention will be described with reference to FIGS. Regarding the second to eighth embodiments, the description in detail regarding the first embodiment is applied as appropriate to points that are not particularly described. 2-8, the same code | symbol is attached | subjected to the same member as FIG.

As shown in FIG. 2, the absorbent article 1 of the second embodiment is different from the first embodiment in the shapes of the concave portion 4, the round emboss 5, and the sub-round embosses 6, 6.
As shown in FIG. 2, the recesses 4 of the absorbent article 1 of the second embodiment are provided at two locations apart from each other and are not connected between the round embosses 5.

In the absorbent article 1 of 2nd Embodiment, as shown in FIG. 2, the one part round embossing 5 surrounding the front-end part 21 of a front middle high part is not provided.
As shown in FIG. 2, the round emboss 5 has a convex “<” shape toward the central portion in the width direction of the absorbent article 1 between the front middle high portion 2 and the rear middle high portion 3.

  As shown in FIG. 2, the absorbent article 1 of the second embodiment is provided with sub-round embosses 6 and 6 along both side edges in the longitudinal direction of the front middle and high part 2. Moreover, the shape of the sub-round embosses 6 and 6 provided around the back middle high part 3 is different from that of the first embodiment as shown in FIG. Since it forms in this way, the shape of the front part 11 is further stabilized and the leak-proof property to a side part also increases. Further, since the front portion 11 and the rear portion 12 are not blocked by the concave portion 4, an improvement in dry feeling and an improvement in absorption efficiency due to liquid diffusibility in the longitudinal direction can be achieved.

  As shown in FIG. 3, the absorbent article 1 of the third embodiment is not provided with the sub-round embosses 6, 6... Provided in the absorbent article 1 of the second embodiment. Others are the same as in the second embodiment.

  As shown in FIG. 4, in the absorbent article 1 of the fourth embodiment, a part of the round embosses 5 and 5 surrounding the rear end portion 32 of the rear middle and high part of the absorbent article 1 of the third embodiment are Not provided. Others are the same as in the third embodiment, and an improvement in dry feeling and absorption efficiency due to liquid diffusibility in the longitudinal direction can be achieved.

  As shown in FIG. 5, the absorbent article 1 of the fifth embodiment has round embossings 5 and 5 provided along both side edges of the rear middle and high part 3 of the absorbent article 1 of the fourth embodiment. Not provided. Others are the same as in the fourth embodiment.

  As shown in FIG. 6, the absorbent article 1 of the sixth embodiment has no round embosses 5 and 5 provided in the fifth embodiment, and the arrangement of the recesses 4 that are the bending starting points 4 is different. . Three recesses 4 of the absorbent article 1 of the sixth embodiment are continuously provided at the center in the width direction between the front middle and high part 2 and the rear middle and high part 3. Others are the same as in the fifth embodiment, but since there is no belt-like portion (groove portion) in the vicinity (near), the function of the concave portion 4 as a bending starting point is enhanced as compared with the first embodiment. Thus, the interlocking between the front part and the rear part becomes low.

  As shown in FIG. 7, in the absorbent article 1 of the seventh embodiment, the concave portion 4 that is a folding start point is separated at two places in the center portion in the width direction between the front middle high portion 2 and the rear middle high portion 3. Is provided. Others are the same as in the sixth embodiment, but have both the effect as a starting point and the effect of liquid diffusion.

  As shown in FIG. 8, the absorbent article 1 of the eighth embodiment is provided with a concave portion 4 that is a bending start point in a hyperbolic shape at the center in the width direction of the absorbent article 1. Others are the same as in the seventh embodiment, and since the concave portion of the sixth embodiment is formed double, the interlocking between the front portion 11 and the rear portion 12 becomes lower, and further, the front portion 11 and the rear portion. The stability of the part 12 can be increased.

The absorbent article 1 of the present invention is not limited to the above-described embodiment, and can be appropriately changed without departing from the gist of the present invention. By using Embodiments 2-5 and Embodiments 6-8 in combination, it can be set as the form which has each effect. (In this case, in order to effectively exhibit the effects of the sixth to eighth embodiments, it is important that the recesses of the sixth to eighth embodiments are separated from the round embossing and the second round embossing of the second to fifth embodiments to some extent. .)
Further, it is possible to form such that the rear middle high portion is higher than the front middle high portion or vice versa, or each middle high portion gradually decreases in height in the front-rear direction or the left-right direction, or vice versa.
In the absorbent article 1 of each embodiment of the present invention described above, the bending starting point 4 is an emboss that joins the topsheet and the absorber, but even an emboss provided only on the absorber. good.
The bending starting point may be formed by bonding the top sheet and the absorbent body with an adhesive, or formed by immersing the adhesive in the absorbent body.

  In the absorbent article of the present invention, the folding starting point (emboss) may be between the front middle high part and the rear middle high part, and is not limited to the shape or number.

FIG. 1 is a perspective view showing a first embodiment of an absorbent article of the present invention. FIG. 2 is a plan view schematically showing a second embodiment of the absorbent article of the present invention. FIG. 3 is a plan view schematically showing a third embodiment of the absorbent article of the present invention. FIG. 4 is a plan view schematically showing a fourth embodiment of the absorbent article of the present invention. FIG. 5 is a plan view schematically showing a fifth embodiment of the absorbent article of the present invention. FIG. 6 is a plan view schematically showing a sixth embodiment of the absorbent article of the present invention. FIG. 7 is a plan view schematically showing a seventh embodiment of the absorbent article of the present invention. FIG. 8 is a plan view schematically showing an eighth embodiment of the absorbent article of the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Absorbent article 2 Front middle high part 21 Front end part 22 of front middle high part Rear end part 3 of front middle high part Rear middle high part 31 Front end part of rear middle high part 32 Rear end part of rear middle high part 4 Bending start point 5 Round emboss 6 Secondary Round Emboss 7 Solid Gather Sheet

Claims (7)

An absorbent article comprising a top sheet, a back sheet and an absorbent body interposed between both sheets,
The absorbent body has, on the skin contact surface side, a middle and high portion that is narrower than the absorbent body and protrudes in a convex shape, and the middle and high portions are formed at the front and rear portions of the absorbent article. Each of the front middle high portion and the rear middle high portion provided separately, and a bending start point between the front middle high portion and the rear middle high portion that does not affect the deformation of the front portion or the rear portion. Absorbent article provided.   The absorbent article according to claim 1, wherein the bending starting point is a concave portion obtained by joining the topsheet and the absorbent body.   The absorbent article according to claim 1 or 2, wherein the bending starting point is provided at a central portion in the width direction of the absorbent article.   The absorptive article according to claim 3 in which said bending start point is provided in said central part in the shape of a hyperbola.   The concave portion extends from between the front middle high portion and the rear middle high portion so as to surround the front middle high portion and the side portion of the rear middle high portion, and extends in the longitudinal direction of the absorbent article. The absorptive article according to claim 2 or 3 currently formed in line symmetry.   The absorbent article according to any one of claims 1 to 5, wherein the front middle-high part and the rear middle-high part have different shapes in plan view. The said back middle high part is an absorbent article in any one of Claims 1-6 formed in the taper shape toward the front.