JP2007202576A - Absorbent laminate and disposable absorbent article - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a disposable absorbent article including an absorber which effectively prevents leakage, is hardly deformed, and exhibits a sufficient a water absorption performance. <P>SOLUTION: An absorbent laminate, used for the disposable absorbent articles to absorb body liquids, includes an upper layer absorber comprising a fiber assembly containing a high water absorbent resin powder equal to or less than 10 mass% and a lower layer absorber comprising a fiber assembly containing a high water absorbent resin powder equal to or more than 20 mass%. At least one opening part extending continuously or in a discontinuous manner in the longitudinal direction of the upper layer absorber is disposed in the upper layer absorber. The disposable absorbent article equipped with the absorbent laminate is also included in this invention. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an absorbent laminate that is less likely to lose shape and has a high urine leakage prevention effect, and a disposable absorbent article such as a disposable diaper and disposable pants provided with the absorbent laminate.

  Absorbents used in disposable diapers and disposable pants are usually pulp fibers (cotton-like pulverized pulp), heat-fusible fibers, highly water-absorbent resin powders, etc., mixed and conveyed from each storage tank. It is formed by sucking and depositing on the peripheral surface of the suction drum provided with a recess (suction region) having substantially the same shape as the absorber shape. The absorbent body sucked and deposited on the suction drum is transferred to a suction conveyor for conveyance, and is incorporated into a production line for disposable absorbent articles.

  Here, when the absorber has a two-layer structure, two suction drums are arranged in series and synchronously controlled, and on the lower layer absorber transferred from the upstream suction drum onto the suction conveyor, A method of placing an upper absorber formed with a suction drum is employed.

  In order to increase the amount of absorption of urine, etc., or to improve the adhesion to the lower crotch of a woman, the conventional two-layer structure absorber has an upper layer absorber having a smaller area than the lower layer absorber. Many of them had a convex cross section. However, such an absorbent body having a thick central portion is difficult to twist in accordance with the movement of the wearer, and there is a case where a gap is formed between the absorbent body and the excretory organ. Further, when the urine absorbing pad is used in combination, it becomes more and more bulky and gives the wearer an unpleasant feeling of stiffness.

In order to solve the above problem, the applicant of the present application is easy to drown according to the wearer's body shape and movement, and even if used together with a separate urine collection pad, it exhibits a leak prevention effect without giving the wearer a feeling of stiffness The present inventors have found an absorbent laminate and a disposable absorbent article having a simple structure that can be applied, and have already filed an application (Patent Document 1).
JP 2003-70842 A

  The absorbent laminate disclosed in Patent Document 1 is formed by superposing two upper and lower absorbent web bodies in which a superabsorbent resin powder is dispersed in pulp fibers, and the upper absorbent web body includes: At least one opening having a smaller area than the lower absorbent web is disposed at the position where the lower absorbent web is disposed, and the superabsorbent resin powder is disposed around the opening compared to other parts. The dispersion density is set high. Thus, since the comparatively big opening part was provided, the laminated body for absorption is easy to roll, and it follows a wearer's movement and prevents a leak. Moreover, even if a separate urine collecting pad is stacked, the crotch part is prevented from becoming bulky, so that the wearer is not stiff. Furthermore, since the dispersion density of the highly water-absorbent resin powder around the opening is increased, the effect of preventing leakage can be effectively exhibited.

  However, in order to further improve the absorption performance, if the dispersion density of the superabsorbent resin powder is increased in the entire absorbent body, it is necessary to further increase the dispersion density of the superabsorbent resin powder around the opening. In the vicinity of the opening, there is a problem that the highly water-absorbing resins block each other and the water absorption performance is not sufficiently exhibited, or the relative amount of the pulp fiber is reduced, and the absorbent web is easily deformed.

  Therefore, an object of the present invention is to provide a disposable absorbent article provided with an absorbent body that is effective in preventing leakage, is not easily deformed, and exhibits sufficient water absorption performance.

  The present invention that has solved the above problems is an absorbent laminate for absorbing bodily fluids used in disposable absorbent articles, and the absorbent laminate is a fiber containing 10% by mass or less of a superabsorbent resin powder. It has an upper layer absorber constituted from an aggregate, and a lower layer absorber constituted from a fiber aggregate containing 20% by mass or more of a superabsorbent resin powder, and the upper layer absorber has a longitudinal direction of the upper layer absorber. The present invention is summarized in that at least one opening that extends continuously or discontinuously is disposed.

  It is preferable that the fiber aggregate constituting the upper-layer absorbent body does not contain a superabsorbent resin powder.

  The maximum width W1 of the opening of the upper absorber is preferably 60% or less of the minimum width W2 of the upper absorber. Further, there are two or more openings, which are arranged substantially symmetrically with respect to the center line along the longitudinal direction of the upper-layer absorbent body, and the fiber aggregate is present on the center line. Also good. Moreover, it may be biased and arranged on the edge side along one of the width directions. If a liquid-permeable intermediate sheet colored other than white is disposed at least below the opening between the upper-layer absorber and the lower-layer absorber, the position of the opening is easily visible. This is a preferred embodiment.

  The present invention also includes a disposable absorbent article comprising the above absorbent laminate. Disposable absorbent articles include, for example, disposable diapers, disposable pants, incontinence pads, sanitary napkins, sanitary shorts, and the like.

  Since the laminated body for absorption of the present invention keeps the superabsorbent resin powder in the upper absorbent body to 10% by mass or less, the lower absorbent body contains 20% by mass or more of the superabsorbent resin powder. In addition, a sufficient amount of water absorption can be secured while suppressing blocking of the superabsorbent resin powders in the upper absorbent body. In addition, liquid reversion is reduced. Furthermore, since the upper layer absorbent body contains a lot of fibers that are effective for maintaining the shape-retaining property, it is difficult for the upper layer absorbent body to lose its shape even if there is an opening. In particular, when the upper-layer absorbent body has an elongated opening, even if a force is applied inward at the wearer's crotch and the absorbent body is bent, the absorbent laminate is closed by closing the opening. It is possible to prevent irregular wrinkles and irregularities from being generated, and to keep the upper surface of the absorber flat. As a result, the layered structure for absorption is prevented from being deformed, and the adhesion with the wearer's crotch is enhanced, thereby improving the leakage preventing effect. On the other hand, when the opening is not closed, diffusion of the body fluid in the longitudinal direction of the absorbent body is promoted, so that the absorbing power of the lower layer absorbent body is sufficiently developed.

  FIG. 1 is a partially cutaway front view of a deployed state of a disposable diaper using a typical absorbent laminate of the present invention, and FIG. 2 is a schematic cross-sectional view corresponding to line XX in FIG. In this cross-sectional view, each component is shown separated for easy understanding. The disposable diaper 1 basically includes a back sheet 2, an absorbent laminate 3, a top sheet 4 narrower than the back sheet, and a pair of left and right side sheets 5. The XX line is a center line (longitudinal center line) along the width direction, and the Y-Y line is a center line (width direction center line) along the longitudinal direction.

  The backsheet 2 is composed of a synthetic fiber nonwoven fabric having a substantially hourglass-like water repellency, a synthetic resin film such as polyethylene (preferably a liquid-impermeable and breathable film) or a laminate thereof. Leg holes S are formed on both sides of the crotch between the abdomen P and the back Q. In consideration of the feeling of touch or when a mechanical surface fastener is used in the fastening system, it is preferable to use a laminate in which the outermost layer is a nonwoven fabric or a knitted fabric as the back sheet 2. The backsheet 2 may be a simple rectangular shape. As a nonwoven fabric, what consists of synthetic fibers, such as a polypropylene, polyethylene, polyester, nylon, or what consists of composite fibers, such as a combination of polyester / polyester, polyester / polyethylene, polypropylene / polyethylene, can be used. As a nonwoven fabric, the nonwoven fabric by the combination of one or more manufacturing methods in the spun bond method, the air through method, the point bond method, the melt blow method, and the airlaid method is preferable. Among these, the long fiber nonwoven fabric manufactured by the spunbond method or the SMS method combining the spunbond method and the melt blow method is preferable from the viewpoint of strength. Most preferred is a long fiber nonwoven fabric produced by a spunbond method.

  A plurality of waist elastic yarns 6 are attached to the upper surface of the front abdominal part P and the back part Q of the backsheet 4 in a stretched state in the width direction, and in the vicinity of the leg hole parts S on both sides, A plurality of leg elastic yarns 7 are attached to the upper surface of the backsheet 2 in a stretched state in the length direction. Instead of a plurality of elastic yarns, a belt-like elastic film or ribbon may be used.

  In addition, a frontal tape 8 is attached to the lower surface of the front abdomen P of the backsheet 2, and both sides of the upper surface of the back portion Q are pasted to the frontal tape 8 when used to fasten a disposable diaper in a three-dimensional manner. Each tape 9 is attached. As a fastening system, the knob 11 and the hook member 10 are attached to the fastening tape 9 and the back sheet 2 is made of the above-described laminated type, or at least the frontal tape 8 portion of the back sheet 2 is made of a loop member such as a nonwoven fabric. It is possible to employ a mechanical fastening system or a fastening system using a conventionally known adhesive.

  The top sheet 4 is formed of a non-woven fabric or a woven fabric made of synthetic fiber having liquid permeability, and is formed in a rectangular shape having a narrower width and the same length as the back sheet 2, and the bottom surface of the top sheet 4 and the back sheet 2. Are joined together with the absorbent laminate 3 and the waist elastic yarn 6 interposed therebetween. As the non-woven fabric or woven fabric, hydrophilic fibers such as silk, rayon and pulp, and those using the above exemplified fibers or composite fibers can be preferably used. A hydrophilization treatment may be performed.

  The pair of left and right side sheets 5 is made of a non-woven fabric made of synthetic fiber having water repellency, has substantially the same length as the back sheet 2 and the top sheet 4, A leg hole S having the same width as that of the back sheet 2 is formed while covering the side edges. The overlapping part of each side sheet 5 with the top sheet 4 is joined to the top sheet 4, and the outwardly extending part extending beyond the top sheet 4 is joined to the back sheet 2 with the leg elastic yarn 7 interposed therebetween. Is done.

  Each side seat 5 has an inner edge 5a folded back inward, and a three-dimensional elastic yarn 12 is attached to the folded portion in a stretched state over almost the entire length of the side seat 5. Yes. The inner edge 5a of the side sheet 5 is joined to the top sheet 4 at the front and rear ends of the disposable absorbent article 1, and the inner edge 5a is absorbed into the upper layer of the absorbent laminate 3 by the contraction of the elastic yarn 12 for three-dimensional gathers. The body 31 is configured to stand up and cover the left and right upper surfaces.

  A waist gather, a leg gather, and a three-dimensional gather are naturally formed by the contraction force of each of the elastic yarns 6, 7, and 12. When worn, the waist gathers in close contact with the wearer's waist leg, and the three-dimensional gather is a side of the urine. Prevent leakage.

  The absorbent laminate 3 includes an upper layer absorber 31 having an opening 33 and a lower layer absorber 32. The upper-layer absorber 31 has a substantially hourglass shape that is slightly smaller than the back sheet 2, and the lower-layer absorber 32 is formed into a substantially rectangular flat body. In the illustrated example, the opening 33 has a substantially rectangular shape that passes through the center of the absorbent laminate 3 and extends in the longitudinal direction of the absorbent laminate.

  In FIG. 2, the more detailed cross-sectional schematic diagram (equivalent to XX line) of the disposable diaper 1 was shown. In this example, a liquid-permeable intermediate sheet 13 is interposed between the upper layer absorber 31 and the lower layer absorber 32, and the upper layer sheet 14 is also interposed between the upper layer absorber 31 and the top sheet 4. It is disguised. On the other hand, the lower layer absorber 32 is in a state where the lower layer sheet 15 is rolled up from both sides of the lower layer absorber 32 to the upper surface thereof and overlapped. In this way, by adopting a configuration in which the upper layer absorber 31 is sandwiched between the upper layer sheet 14 and the liquid permeable intermediate sheet 13, the upper layer absorber 31 has a structure that is less likely to be deformed. Further, since the lower layer absorber 32 is also wrapped by the lower layer sheet 15, it is difficult to lose its shape, and either the liquid permeable intermediate sheet 13 and the upper or lower layer absorbers 31, 32 or both are joined with a hot melt adhesive or the like. If so, the strength of the absorbent laminate 3 is further improved.

  If the liquid permeable intermediate sheet 13 is colored other than white, which is a color of a nonwoven fabric or the like, the color of the liquid permeable intermediate sheet 13 below the opening 33 is the same even if the top sheet 4 or the upper layer sheet 14 is present. This is preferable because it is visible from above and the wearer can recognize the position of the opening 33. When the opening 33 becomes visible, it becomes a guideline for applying to the crotch portion of the wearer at the time of wearing, or a guideline for positioning when using other absorbent articles such as a disposable auxiliary pad. Convenience for the user is improved. The color of the liquid-permeable intermediate sheet 13 is preferably a color other than red, yellow, or brown, and for example, light green, light blue, and the like are preferable.

As the liquid-permeable intermediate sheet 13 and the upper and lower layer sheets 14 and 15, hydrophilic or liquid-permeable sheet materials such as tissue paper (thin paper) and liquid-permeable nonwoven fabric are used. The liquid-permeable intermediate sheet 13, basis weight 10 to 30 g / m ² about a liquid-permeable nonwoven fabric (especially polypropylene nonwoven spunbonded method), as the upper and lower layer sheets 14 and 15, basis weight 10 to 30 g / m ² A degree of tissue paper is preferred. The absorbent laminate 3 is bonded to the upper surface of the backsheet 2 with the lower layer absorber 32 facing down.

  FIG. 3 is a plan view of the absorbent laminate 3 having the same shape as that used in the disposable absorbent article shown in FIG. The upper absorber 31 is provided with an opening 33. In FIGS. 1 to 3, a substantially rectangular opening 33 that extends continuously in the longitudinal direction of the upper absorbent body 31 is disposed at substantially the center of the upper absorbent body 31, but of course it is not limited to the illustrated example. The maximum width W1 of the opening 33 is preferably 60% or less of the minimum width W2 of the upper absorber 31 from the viewpoint of preventing the upper absorber 31 from being deformed. More preferably, it is 50% or less, More preferably, it is 40% or less.

  In FIG. 4, the top view of the upper layer absorber in which the opening part which has another shape and positional relationship was formed was shown. FIG. 4A shows an example in which small rectangular openings 33 a are arranged in a rectangular upper layer absorber 31 in a state of extending discontinuously in the longitudinal direction of the upper layer absorber 31. The opening 33a is arranged symmetrically with respect to the YY line, and a fiber assembly is present on the YY line. In FIG. 4B, an elongated ring-shaped opening 33 b continuously extending in the longitudinal direction of the upper layer absorber 31 is provided. The opening 33b is line-symmetric with respect to the YY line, and a fiber aggregate is present at least at approximately the center on the YY line. FIG. 4C is an example in which small triangular openings 33 c are arranged in a state of extending discontinuously in the longitudinal direction of the upper-layer absorber 31. The opening 33c is also arranged symmetrically with respect to the YY line, and a fiber aggregate is present on the YY line.

  Since the openings 33a to 33c shown in FIG. 4 extend in the longitudinal direction of the upper layer absorber 31, the effect of absorbing the body fluid into the lower layer absorber 32 while diffusing in the longitudinal direction is high. In addition, the presence of the fiber aggregate on the Y-Y line increases the adhesion to the wearer's crotch, and the body fluid can be quickly absorbed into the absorbent laminate 3, so that leakage is effective. Is prevented. Moreover, since the opening part shown in these figures has an elongate shape, even if a force is applied inward in a wearer's crotch and an absorber will bend, it will absorb by closing an opening part. Irregular wrinkles and irregularities can be prevented from occurring in the laminate 3 and the upper surface of the upper absorber 31 can be kept flat. By arranging the openings in line symmetry, the effect of maintaining the upper surface of the upper absorber 31 flat is enhanced. As a result, the shape of the absorbent laminate 3 can be prevented from being lost, and the adhesiveness with the wearer's crotch can be improved to further improve the leakage prevention effect.

  In the case of the openings 33a to 33c shown in FIG. 4, the maximum width W1 of the opening is the maximum at which one line parallel to the XX line cuts out the opening extending in the longitudinal direction of the upper absorber 31. Defined as length. Therefore, as shown in FIG. 4B, when there is an opening 33b ′ extending in the width direction of the upper-layer absorber 31, the maximum width W1 is determined so that parallel lines of the XX line do not pass through this portion. . 4A, the maximum width W1 of the opening is twice the length of the short side of the rectangular opening 33a. In FIG. 4B, the maximum width W1 is twice the groove width of the ring-shaped opening 33b. In FIG. 4C, it is twice the length of the base of the triangle. In addition, as long as the maximum width W1 of an opening becomes 40% or less of the minimum width W2 of the upper layer absorber 31, the number of rows of openings may be three or more.

  The upper layer absorbent body 31 is a fiber assembly including 10% by mass or less of a super absorbent polymer powder. As the fibers, defibrated pulp fibers and cellulose fibers are mainly used, but heat-fusible fibers and the like may be mixed as necessary. In the upper layer absorbent body 31, the total amount of the superabsorbent resin powder is 10% by mass or less (including 0% by mass) in a total of 100% by mass of the fibers and the superabsorbent resin powder. If it exceeds 10% by mass, the highly water-absorbent resin powders block each other to inhibit water absorption, and the amount of pulp fibers having an effect of improving the shape retention property is insufficient, so that the mold is likely to be deformed. The upper layer absorber 31 may not contain any superabsorbent resin powder. This is because the lower layer absorber 32 containing a large amount of highly water-absorbent resin powder is laminated and exhibits a sufficient water absorption capability. As the highly water-absorbent resin powder, polyacrylic acid (salt) type ordinarily used in this field is preferable.

  On the other hand, the lower layer absorber 32 is a fiber assembly including 20% by mass or more of a superabsorbent resin powder. As described above, since the superabsorbent 31 does not contain a small amount or at all of the superabsorbent resin powder, a large amount of superabsorbent resin powder is blended in the lower absorber 32 to improve the absorption capacity of the absorbent laminate 3 as a whole. Secure it. In addition, by holding the excretory liquid in the superabsorbent resin powder, the liquid can be prevented from returning. However, when too much superabsorbent resin powder is blended, the lower layer absorber 32 becomes stiff, so 80 mass% or less is preferable, and 60 mass% or less is more preferable.

  In the absorbent laminate 3 illustrated so far, the lower layer absorber 32 is formed to be narrower than the upper layer absorber 31, and both longitudinal ends of the upper layer absorber 31 are longer than both longitudinal ends of the lower layer absorber 32. Is also structured to extend outward. Of course, both the absorbers 31 and 32 may have the same width, and both the longitudinal end portions of the upper layer absorber 31 and the longitudinal end portions of the lower layer absorber 32 may be aligned.

  FIG. 5 shows a development view of the disposable pants 50 as another embodiment of the disposable absorbent article of the present invention, and FIG. 6 shows a cross-sectional view of the disposable pants 50 taken along the line X1-X1 in FIG. The disposable pants 50 have a front abdomen P, a back part Q, and a crotch R, and a leg hole S is formed in the crotch R. The disposable pants 50 have a torso opening and a pair of left and right leg holes S by joining the left and right side edges 51 of the front abdomen P and the left and right side edges 52 of the back part Q, respectively. It becomes. This disposable pant 50 basically has a configuration in which an absorbent main body including the absorbent laminate 55 of the present invention that contains and holds bodily fluids is provided on the inner surface of an exterior member 53 (54) that forms the outer shape of the pant. ing. The wearer can wear and use the legs through the legs from the trunk opening toward the left and right leg openings.

  A waist elastic yarn 56 is attached to the waist opening of the disposable pants 50 in a stretched state around the waist. In the leg hole portion S, leg elastic yarns 57 are attached to the periphery of the leg hole in a stretched state. Further, a trunk periphery elastic yarn 58 is attached to the trunk periphery between the trunk opening and the leg hole S in a stretched state around the trunk. Due to the shrinkage of the waist elastic yarn 56, the waist circumference elastic yarn 57, and the leg elastic yarn 58, the disposable pants 50 are suitably fitted to the wearer.

  The absorbent laminate 55 of the disposable pants 50 has an upper layer absorbent body 61 and a lower layer absorbent body 62 sandwiched and bonded between a liquid permeable top sheet 59 and a liquid impermeable back sheet 60. Yes. The upper absorber 61 is provided with two elongated openings 63 extending in the longitudinal direction of the upper absorber 61 symmetrically with respect to the Y1-Y1 line. The opening 63 straddles the X1-X1 line and is arranged in a biased direction toward the front abdomen P, and is slightly curved toward the inside of the disposable pants 50. Since the opening 63 is arranged in the direction of the front abdominal part P, the area of the absorbent laminate 55 can be secured widely from the crotch R to the back part Q. The effect of the elongated opening is as described above.

  In this example, the back sheet 60 is wound up to the upper surface of the upper layer absorbent body 61. Side sheets 64 are respectively joined to the left and right side edges of the top sheet 59 to the top sheet 59 and the upper surface of the rolled back sheet 60. A three-dimensional gather elastic yarn 65 is attached to the side end of the side sheet 64 in an expanded state, and the elastic yarn 65 contracts to form a three-dimensional gather that rises upward, such as urine. Side leakage of body fluid can be prevented.

  In this example, the upper layer sheet 66 of the upper layer absorbent body 61 is folded back to the lower side of the upper layer absorbent body 61, and a liquid permeable intermediate is provided between the folded surface of the upper layer sheet 66 and the lower side of the upper layer absorbent body 61. A sheet 67 is provided. Further, the lower layer sheet 68 is folded back from the both sides of the lower layer absorber 62 to the upper surface thereof. These constituent members are bonded to each other with a hot melt adhesive as appropriate. Materials and the like that can be used as each member are the same as those of the above-described absorbent laminate 3.

  The exterior member is composed of two sheets 53 and 54, between which the waist elastic yarn 56, the waist circumference elastic yarn 57 and the leg elastic yarn 58 are joined in an expanded state. As the sheets 53 and 54 constituting the exterior member, a water-repellent nonwoven fabric or a liquid-impermeable plastic film can be used, but a water-repellent nonwoven fabric is preferable in order to prevent stuffiness.

  The elastic yarn used in the present invention is preferably an elastic stretch material (polyurethane yarn, natural rubber, etc.) that is usually used frequently in disposable absorbent articles. It may be a strip-like polyurethane film. The elastic yarn is attached in a stretched state by a suitable attachment means such as a hot melt adhesive, thermal bonding, ultrasonic bonding or the like. Preferably, polyurethane yarn having a fineness of 300 to 2000 dtex is stretched and attached at a magnification of 1.1 to 5.0 times. As an attachment means, it is preferable to use a hot melt adhesive.

Hot-melt adhesives include styrene-based hot-melt adhesives such as SIS and SBS that contain a styrene-based block polymer as the base polymer, and amorphous polyalphaolefins (APAO) such as ethylene / propylene copolymers and base polymers based on ordinary olefins. It is possible to use an olefin-based hot-melt adhesive containing as a base polymer, an ethylene-vinyl acetate copolymer (EVA), a polyester, or an ethylene-vinyl acetate copolymer as a base polymer. Among them, a styrene-based hot melt adhesive is preferable.
The coating method may be either contact type or non-contact type, but the non-contact type (spiral coating, melt blow coating, etc.) and the method of traveling fine fibers in the form of a mesh or spiral is the adhesive strength, softness, etc. From the balance, it is preferable. The coating amount of the hot melt adhesive, about 1 to 10 g / m ² are preferred.

  The absorbent laminate of the present invention is configured as described above, and a sufficient amount of water absorption can be secured while suppressing blocking of the superabsorbent resin powders in the upper absorbent body. In addition, the liquid can be prevented from returning. Furthermore, since the upper layer absorbent body contains a lot of fibers that are effective for maintaining the shape-retaining property, it is difficult for the upper layer absorbent body to lose its shape even if there is an opening.

  Therefore, as an absorbent body for disposable pants, disposable diapers, urine-absorbing pads, sanitary napkins, sanitary shorts, light incontinence shorts, etc., it is inexpensive and free from inconvenience such as leakage by being incorporated into disposable absorbent articles. Disposable absorbent articles can be easily provided. The absorbent laminate of the present invention can be used not only for disposable absorbent articles, but also for agricultural water retention / absorption materials, concrete curing mats, anti-condensation sheets, poultices, patches, cosmetics and the like.

It is a partial notch front view of the disposable diaper using the typical laminated body for absorption of this invention. It is a cross-sectional schematic diagram equivalent to the XX line of FIG. It is a top view of the typical laminated body for absorption of this invention. (A)-(c) is a top view of the upper-layer absorber which has an opening part of another shape. It is a top view of the deployment state of disposable pants using the typical layered product for absorption of the present invention. FIG. 6 is a schematic cross-sectional view corresponding to the X1-X1 line in FIG. 5.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Disposable diaper 2, 60 Back sheet 3, 55 Absorption laminated body 4, 59 Top sheet 5, 64 Side sheet 6, 56 Elastic thread for waist 7, 57 Elastic thread for leg 8 Frontal tape 9 Fastening tape 10 Hook member 11 Picking Portions 12, 65 Elastic yarn for three-dimensional gathers 13, 67 Liquid-permeable intermediate sheet 14, 66 Upper layer sheet 15 68 Lower layer sheet 31, 61 Upper layer absorber 32, 62 Lower layer absorber 33, 33a-c, 63 Opening 50 Disposable pants 51 Side edge part of front abdomen 52 Side edge part of back part 53, 54 Exterior member 58 Elastic thread for waist circumference P Front part Q Rear part S Leg hole part R Crotch part

Claims (7)

An absorbent laminate for absorbing bodily fluids used in disposable absorbent articles,
This absorbent laminate was composed of an upper-layer absorber composed of a fiber assembly containing 10% by mass or less of a superabsorbent resin powder and a fiber assembly containing 20% by mass or more of a superabsorbent resin powder. Having an underlayer absorber,
The upper layer absorbent body is provided with at least one opening that extends continuously or discontinuously in the longitudinal direction of the upper layer absorbent body.   The absorbent laminate according to claim 1, wherein the fiber aggregate constituting the upper absorbent body does not contain a superabsorbent resin powder.   The absorbent laminate according to claim 1 or 2, wherein the maximum width W1 of the opening of the upper-layer absorber is 60% or less of the minimum width W2 of the upper-layer absorber.   The said opening part is two or more, is arrange | positioned substantially left-right symmetrically with respect to the center line along the longitudinal direction of an upper layer absorber, The fiber assembly exists on a center line of Claims 1-3. The absorbent laminate according to any one of the above.   The absorbent laminate according to any one of claims 1 to 4, wherein the opening is disposed to be deviated toward an edge side along one of the width directions.   The absorption according to any one of claims 1 to 5, wherein a liquid-permeable intermediate sheet colored other than white is disposed at least below the opening between the upper layer absorber and the lower layer absorber. Laminated body.   The disposable absorbent article provided with the laminated body for absorption in any one of Claims 1-6.

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