JP5943504B2 - Absorbent articles - Google Patents

Description

  The present invention relates to an absorbent article that is ultra-thin and excellent in absorbability. More specifically, the present invention relates to a disposable light incontinence product that absorbs and retains excrement such as urine, a pants-type paper diaper, a urine pad, and a tape-locked paper diaper.

  A mixture of a water absorbent resin and fluff pulp (hereinafter referred to as “pulp”) is used for the absorbent body of the disposable absorbent article. This mixture spreads and retains urine by embedding a water-absorbing resin uniformly or in a specific part in a pulp mat, and in order to obtain a predetermined absorption performance, a certain amount of water-absorbing resin and The amount of pulp is required.

  When there is much pulp with respect to a water absorbing resin, the thickness of a product will also become thick, and inconveniences, such as obstructing a fit feeling for a wearer, feeling uncomfortable, and wearing out conspicuously on clothes generate | occur | produce. In order to improve this, measures such as reducing pulp, pressing the absorbent mat, and embossing are taken, but in such cases, problems such as stiffening of the absorbent mat and slowing the absorption rate occur. is there.

  Moreover, when there are many water absorbing resins with respect to a pulp, although an absorption capacity will increase, the spreading | diffusion of urine and an absorption speed will worsen, and it will cause a leak. That is, the absorption rate for the first urination is not much different from that of the case where there is much pulp, but the absorption rate for the second and third urinations is that the water-absorbent resin swollen by the absorption of the first urine inhibits the diffusion of urine. To be extremely slow. Further, in common in the case of the pulp rich and water absorbent resin rich, the water absorbent resin and the mat of the pulp are liable to be swung during use.

  As described above, the absorbent body of the mixture of the water absorbent resin and the pulp has advantages and disadvantages, and a thin absorbent body has been proposed to solve them.

  Absorption in which water-absorbent resin adheres between two non-woven fabrics by a hot-melt network for the purpose of improving the shape retention of the absorbent body after water absorption and reducing the thickness of the absorbent body. A laminated body is disclosed (for example, see Patent Document 1). In addition, for the purpose of preventing the absorption rate and gel blocking of the superabsorbent polymer, the superabsorbent polymer particles having a specific particle size distribution in the fiber material are dispersed and arranged in the thickness direction with a certain void. An absorbent sheet is disclosed (for example, refer to Patent Document 2).

JP 2004-106554 A JP 2007-61171 A

  However, none of the above proposals is excellent in all absorption performances such as absorption amount, absorption rate, and smooth feeling after absorption (reduction of liquid return). In fact, for a user, there is a demand for a product with a sense of security that has good shape retention and excellent absorption performance even if it is thin.

  Therefore, the present invention has been made in view of the above problems, and provides an absorbent article that is ultra-thin, soft and easy to move, has sufficient absorption performance, and is safe to use. For the purpose.

  Such an object is achieved by the present inventions (1) to (8) below.

(1) An absorbent article comprising an absorbent body having a water absorbent sheet and a water absorbent fiber layer in order from the top sheet side between a top sheet made of a liquid permeable sheet and a back sheet made of a liquid impermeable sheet. The water absorbent sheet contains, in order from the top sheet side, the upper hydrophilic nonwoven fabric, the primary water absorbent layer containing the water absorbent resin A and the adhesive, the intermediate hydrophilic nonwoven fabric, the water absorbent resin B and the adhesive. An absorbent article comprising a secondary water-absorbing layer and a lower hydrophilic nonwoven fabric, wherein the total content of the water-absorbent resin A and the water-absorbent resin B in the water-absorbent sheet is 100 to 1000 g / m ² .

  (2) The absorbent article according to (1), wherein the water absorbent fiber layer is a pulp air laid layer or a fluff pulp layer having a water absorption of 5 g / g or more.

  (3) The absorbent article as described in (1) or (2), wherein the water absorbent fiber layer contains 50% by mass or less of a water absorbent resin.

  (4) The absorbent article according to any one of (1) to (3), wherein the water absorbent sheet has a portion integrated by embossing from the upper hydrophilic nonwoven fabric to the lower hydrophilic nonwoven fabric.

  (5) The absorbent article according to any one of (1) to (4), wherein a total of three repetition absorption rates is 120 seconds or less and a thickness is 5 mm or less.

  (6) The absorbent article according to any one of (1) to (5), wherein a pair of side leakage preventing portions is provided on both sides in the longitudinal direction.

(7) A hydrophilic nonwoven fabric further comprising a liquid diffusable sheet between the top sheet and the absorbent body, the liquid diffusible sheet having a thickness of 0.5 mm or more and a basis weight of 25 g / m ² or more. The absorbent article according to any one of (1) to (6), wherein

  (8) The absorption rate of the water-absorbent resin A contained in the primary water-absorbing layer constituting the water-absorbing sheet is 30 to 70 seconds in terms of Vortex method absorption rate, and the water-absorbing resin contained in the secondary water-absorbing layer constituting the absorbent sheet The absorbent article according to any one of (1) to (7), wherein the absorption rate of B is 1 to 30 seconds in terms of Vortex method absorption rate, and the difference between the two is at least 10 seconds or more.

  According to the present invention, it is possible to provide an absorbent article that is ultra-thin, soft and easy to move, has sufficient absorption performance, and is safe to use.

It is sectional drawing of the absorbent article which concerns on embodiment of this invention. It is a perspective view of the light incontinence pad which concerns on embodiment of this invention.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments for carrying out the present invention (hereinafter referred to as embodiments) will be described in detail with reference to the accompanying drawings.

  FIG. 1 is a cross-sectional view of an absorbent article according to an embodiment of the present invention.

  The absorbent article 1 is composed of a water absorbent sheet 4 mainly for diffusing and holding liquid and a composite sheet provided with water absorbent fibers 5 therebelow as an absorbent body 6, and a liquid diffusable sheet 7 on the upper side of the absorbent body 6. In addition, a liquid-permeable top sheet 2 is disposed, and a liquid-impermeable leak-proof back sheet 3 is provided below the absorber 6.

  The water absorbent sheet 4 includes an upper hydrophilic nonwoven fabric 41, a primary water absorbent layer 42, an intermediate hydrophilic nonwoven fabric 43, a secondary water absorbent layer 44, and a lower hydrophilic nonwoven fabric 45.

  The primary water-absorbing layer 42 and the secondary water-absorbing layer 44 contain a water-absorbing resin and an adhesive, and the upper hydrophilic nonwoven fabric 41, the primary water-absorbing layer 42, the intermediate hydrophilic nonwoven fabric 43, and the secondary water-absorbing layer by the adhesive. 44 and the lower hydrophilic nonwoven fabric 45 are adhered to each other.

  As an index of the absorption rate of the water absorbent resin, there is an absorption rate of physiological saline by the Vortex method. This is done by adding 50 ml of physiological saline to a 100 ml beaker containing a rotor, stirring at 600 rpm using a magnetic stirrer, precisely weighing 2.000 g of the water-absorbing resin, and throwing it into the vortex. Time measurement is started with a stopwatch and the time until the rotor of the magnetic stirrer stops is measured. The smaller the value, the faster the absorption rate.

  The absorption rate of the physiological saline by the Vortex method of the water absorbent resin A used for the primary water absorption layer 42 increases the absorption rate of the liquid of the water absorbent sheet 4 and avoids the retention of the liquid in the primary absorption layer. From the viewpoint of quickly diffusing to the left and right and the lower part, 30 to 70 seconds are preferable, more preferably 35 to 60 seconds, and still more preferably 35 to 55 seconds.

  The water-absorbing resin contained in the secondary water-absorbing layer 44 has a role of quickly absorbing and holding the liquid that could not be absorbed by the primary water-absorbing layer. For that purpose, it is preferable to use a water-absorbing resin having a high absorption rate.

  The absorption rate of the physiological saline by the Vortex method of the water absorbent resin B contained in the secondary absorbent layer 44 is preferably 1 to 30 seconds, more preferably 2 to 25 seconds, and further preferably 3 to 20 seconds. is there.

  There is preferably a positive difference between the absorption rate of the water absorbent resin A used in the primary absorbent layer 42 and the absorption rate of the water absorbent resin B contained in the secondary absorbent layer 44. The larger the difference, the more the liquid is prevented from staying in the primary absorption layer 42 and the liquid is more efficiently retained in the secondary absorption layer. Specifically, the difference between the two is preferably 10 seconds or more, more preferably 15 seconds or more, and further preferably 20 seconds or more.

  The median particle diameter of the water-absorbent resin used in the present invention is preferably 100 to 600 μm, more preferably 200 to 500 μm, regardless of whether it is a primary absorption layer or a secondary absorption layer. From the viewpoint of avoiding the specification of fine powder having poor fluidity as a powder and enhancing the basic performance of the absorbent sheet 4, the median particle diameter of the water absorbent resin is preferably 100 μm or more, preventing the absorbent sheet 4 from becoming stiff, Further, from the viewpoint of improving the tactile sensation by reducing the jerky feel, the median particle diameter of the water absorbent resin is preferably 600 μm or less.

The total content of the absorbent sheet 4 absorbent resin contained in the A, the water-absorbing resin B is preferably in the range of 100 to 1000 g / ^{m 2} by the absorption performance required, more preferably 200 to 800 g / ^{m 2,} More preferably, it is 250-600 g / m < ² >. From the viewpoint of exhibiting sufficient absorption performance as the absorbent sheet 4 and maintaining a smooth feeling after absorption, the total content is preferably 100 g / m ² or more, ultra thin, soft and easy to move. From the viewpoint, the total content is preferably 1000 g / m ² or less.

  The content ratio of the water absorbent resin A in the primary water absorbent layer 42 and the water absorbent resin B in the secondary water absorbent layer 44 is (water absorbent resin A in the primary water absorbent layer 42) / (water absorbent resin in the secondary water absorbent layer 44). Resin B) = 98/2 to 50/50 is preferred. The ratio of the primary absorption layer 42 is preferably 98 or less from the viewpoint of sufficiently exhibiting the absorbency of the secondary absorption layer 44, and from the viewpoint of reducing liquid return of the primary absorption layer, The ratio is preferably 50 or more.

  The content ratio of the adhesive in the primary water-absorbing layer 42 and the secondary water-absorbing layer 44 is 0.05 to the content (mass basis) of the water-absorbing resin A or the water-absorbing resin B in order to fix the water-absorbing resin. It is preferable to be -2.0 times. If it is less than 0.05 times, the fixing of the water absorbent resin is insufficient, and if it exceeds 2.0 times, the water absorption of the water absorbent resin is inhibited or the sheet becomes hard. More preferably, it is the range of 0.1 to 1.5 times.

  As the composition of the absorbent resin A and the absorbent resin B, known ones can be used, such as polyacrylic acid, starch, and cellulose.

  Adhesives have a melting point of about 100 to 180 ° C., and synthetic rubbers such as styrene-butadiene-styrene copolymers, styrene-isoprene-styrene copolymers, or olefins such as ethylene-vinyl acetate copolymers. Hot melt adhesives of the system are used. As a method for applying the hot melt adhesive, there are a curtain coating method and a spiral method in which a molten adhesive is applied in a non-contact manner from a nozzle, and a known method such as a slot method can be used for the contact type.

  Further, by applying heat embossing to the entire water absorbent sheet 4 in which the upper hydrophilic nonwoven fabric 41, the primary water absorbent layer 42, the intermediate hydrophilic nonwoven fabric 43, the secondary water absorbent layer 44, and the lower hydrophilic nonwoven fabric 45 are integrated with an adhesive. In addition, it is possible to efficiently diffuse the liquid throughout the water absorbent sheet 4 and to further enhance the fixing of the water absorbent resin. The emboss pattern is not particularly limited to a straight line, a curve, a dot shape, etc., and the pattern shape is also appropriately selected to efficiently diffuse the liquid, such as a lattice shape, a wavy shape, an akon pattern (acorn continuous shape). The

  Moreover, in order to obtain a thing with much absorption amount, it is also possible to pile up the water absorbing sheet 4 of the said structure, and to set it as a multistage water absorbing sheet.

The intermediate hydrophilic nonwoven fabric 43, the upper hydrophilic nonwoven fabric 41, and the lower hydrophilic nonwoven fabric 45 constituting the water absorbent sheet 4 can be used as long as they are 20 g / m ² or more, but at least one is a spunlace nonwoven fabric. Is preferred. Furthermore, it is still more preferable if it is the lower hydrophilic nonwoven fabric 45. This is because the spunlace nonwoven fabric has high hydrophilicity and can itself retain water to temporarily hold the liquid. As the spunlace nonwoven fabric, rayon, cotton cellulose, and synthetic fiber can be used. The basis weight can be selected as appropriate, but is preferably 20 g / m ² or more. Other than the spunlace nonwoven fabric, an air-through nonwoven fabric, a point bond nonwoven fabric, and a spunbond nonwoven fabric made of synthetic fibers such as polypropylene, polyethylene, and polyester can be used. In the present invention, an air-through nonwoven fabric that is particularly excellent in preventing liquid return is suitable.

  A water-absorbing fiber layer 5 is provided between the water-absorbing sheet 4 and the leak-proof back sheet 3, and the liquid that has not been completely absorbed by the secondary water-absorbing layer 44 in the water-absorbing sheet 4 is finally formed in the water-absorbing fiber layer 5. To prevent the liquid from returning to the top. The water-absorbing fiber layer 5 is a laminate of wood pulp-based air laid nonwoven fabric or fluff pulp, and has a water absorption of 5 g / g or more. Moreover, what laminated | stacked fluff pulp and contained 50 mass% or less water-absorbing resin becomes more excellent in the point of water absorption performance. In addition to laminating the water-absorbing fiber layer 5 alone, it is possible to sandwich or wrap the upper and lower sides with a nonwoven fabric or a pulp sheet.

  A liquid diffusable sheet 7 is provided between the water absorbent sheet 4 and the top sheet 2. The liquid first diffuses and absorbs sequentially through the top sheet 2 to the water-absorbing sheet 4 and the water-absorbing fibers 5, but it is preferable that the liquid diffuses back and forth and right and left as soon as possible after absorption. Therefore, the liquid diffusable sheet 7 is provided under the top sheet 2 to promote diffusion, and the liquid can be widely moved to the water absorbent sheet 4 and can be efficiently absorbed.

As the liquid diffusive sheet 7, an air-through nonwoven fabric, a point bond nonwoven fabric, and a spunbond nonwoven fabric made of a synthetic fiber such as polypropylene, polyethylene, and polyester having a basis weight of 25 g / m ² or more can be used. . In the present invention, an air-through nonwoven fabric that is particularly excellent in preventing liquid return is suitable.

In addition to the above configuration, a deodorant having a deodorizing function is added together with the water-absorbing resin, or the deodorant is applied to a nonwoven fabric or a pulp sheet, and a supported sheet is appropriately laminated in the above configuration. Can do.

  Moreover, in order to prevent the side leak at the time of wear, a pair of side leak-proof part 8 can be provided in a longitudinal direction both-sides edge part. The side leak-proof portion is formed using a water-repellent nonwoven fabric and is adhered to the longitudinal side edge of the absorbent body 6 with an adhesive or the like so as to prevent the absorbent body 6 from exuding from the lateral direction. The side leak-proof portion 8 can be a so-called three-dimensional gather that rises three-dimensionally above the absorbent article 1.

  FIG. 2 shows the appearance of a light incontinence pad 11 that is an application product of the absorbent article 1 of the present invention. The top sheet 12, the back sheet 13, and the side leak-proof part 18 can be seen.

  With the above-described configuration, the absorbent article 1 has a thickness of 5 mm or less (measurement method will be described later), and the total of three absorption speeds is 120 seconds or less. In addition, as for the thickness as the absorbent article 1, 4 mm or less is more preferable, and 3 mm or less is further more preferable. The total absorption rate is more preferably 100 seconds or less, and still more preferably 80 seconds or less.

Examples 1-4 and Reference Example as the top sheet 2 of basis weight 20 g / ^{m 2} air-through nonwoven fabric, air-through nonwoven fabric having a basis weight of 30 g / ^{m 2} as a liquid diffusion sheet 7, a back sheet 3 having a basis weight of 32 g / ^{m 2} A breathable polyethylene film is used as a common member, and the configuration of the water absorbent sheet 4 and the water absorbent fiber layer 5 are different.

Example 1
Through-air bonded nonwoven fabric having a basis weight of 20 g / ^{m 2} on the upper hydrophilic nonwoven 41 of the water-absorbent sheet 4, through-air bonded nonwoven fabric having a basis weight of 20 g / ^{m 2} in the intermediate hydrophilic nonwoven fabric 43, the lower hydrophilic non-woven 45 having a basis weight of 35 g / ^{m 2} rayon-based The total content of the water-absorbing resin A and the water-absorbing resin B of the spunlace nonwoven fabric, the water-absorbing sheet 4 is 290 g / m ² , the water-absorbing resin A of the primary water-absorbing layer 42 has an absorption rate of 42 seconds and a median particle diameter of 380 μm. The water absorbent resin B of the secondary water absorbent layer 44 has an absorption rate of 20 seconds, a median particle diameter of 310 μm, and a mass ratio of the water absorbent resin A of the primary water absorbent layer 42 to the water absorbent resin B of the secondary water absorbent layer 44 of 50. The absorbent article 1 was prepared using a wood pulp-based basis weight of 75 g / m ² airlaid nonwoven fabric for the water absorbent fiber layer 5.

(Example 2)
As the water-absorbing resin B of the secondary water-absorbing layer 44 in the water-absorbing sheet 4, the absorption rate is 5 seconds, the median particle diameter is 250 μm, the total content of the water-absorbing resin A and the water-absorbing resin B is 375 g / m ² , An absorbent article 1 having the same configuration as that of Example 1 was produced except that the mass ratio of the water absorbent resin A of the layer 42 and the water absorbent resin B of the secondary water absorbent layer 44 was 60/40.

(Example 3)
Example 3 has the same configuration as Example 2 except that the mass ratio of the water absorbent resin A of the primary water absorbent layer 42 and the water absorbent resin B of the secondary water absorbent layer 44 in the water absorbent sheet 4 is 80/20. Absorbent article 1 was produced.

( Reference example )
In the reference example , an absorbent article 1 having the same configuration as that of Example 1 was produced except that a mixture of 6.0 g of fluff pulp and 2.0 g of a water absorbent resin was used as the water absorbent fiber layer 5.

(Example 4 )
The water-absorbing resin A of the primary water-absorbing layer 42 of the water-absorbing sheet 4 has an absorption speed of 20 seconds and a median particle diameter of 310 μm, and the water-absorbing resin B of the secondary water-absorbing layer 44 has an absorption speed of 42 seconds and a median particle diameter of 380 μm. Absorbent article 1 was produced using the same conditions and the same conditions as in Example 1 except that those were used.

(Comparative Example 1)
Instead of the water absorbent sheet 4 used in Examples 1 to 4, a mixture of two layers of fluff pulp and a water absorbent resin is used, the water absorbent fiber layer 5 is not used, and the top sheet 2 and the liquid diffusable sheet 7 are used. Prepared the absorbent article 1 using the same thing as Examples 1-4.

(Comparative Example 2)
As a water-absorbing sheet, a 35 g / m ² rayon-based spunlace nonwoven fabric is used for the upper hydrophilic nonwoven fabric, and a 20 g / m ² air-through nonwoven fabric is used for the lower hydrophilic nonwoven fabric. A water absorbent layer made of resin was used, and an absorbent article in which a wood pulp-based basis weight 75 g / m ² airlaid nonwoven fabric as a water absorbent fiber layer was laminated on the upper side of the water absorbent sheet was produced.
About the absorbent article produced in Examples 1-4, the reference example , and Comparative Examples 1 and 2, each physical property was measured and compared with the following test methods.

(Measuring method)
(thickness)
Using a Peacock dial gauge manufactured by Ozaki Seisakusho, a weight was placed on the dial gauge so that a load of 3432 Pa was applied, and the thickness of the absorbent article in the longitudinal direction and the central part in the width direction was measured.

(Absorption rate 3 times method)
A hole with an inner diameter of 19 mm is opened in the center of a cylinder having a bottom area of 16.8 cm ² , and a measuring jig having a weight of 755.6 g is placed on the longitudinal direction and the center in the width direction of the absorbent article, 20 ml of physiological saline is dropped from the upper hole, and the time is measured from the time when the physiological saline comes into contact with the water-absorbing article to the point where the liquid is completely sucked into the circumference of the jig center circle (first time) ). Then, 20 ml of physiological saline is injected again after the elapse of 3 minutes, and the time until absorption is similarly measured (second time). Similarly, the third time is measured.

(Liquid return)
120 ml of physiological saline is injected into the longitudinal direction and the center in the width direction of the absorbent article, and after 10 minutes, a filter paper (No. 2 filter paper manufactured by ADVANTEC, diameter 55 mm) whose weight has been measured in advance is centered on the injection site. And a 687 g weight is placed thereon (35 g / cm ² ). One minute after placing the weight, the weight of the filter paper is measured, and the weight difference of the filter paper is defined as the liquid return amount.

(Total absorption)
The absorbent article whose weight has been measured in advance is immersed for 5 minutes so as to be completely immersed in physiological saline. After 5 minutes, with the top sheet of the absorbent article down, drain on the wire mesh for 30 seconds, measure the weight after absorption, and the difference in weight before and after absorption is the total absorption. The total absorption amount is also one of the absorption performances and affects leakage and dry feeling, but can be appropriately set depending on the required performance.

Table 1-1 is Examples 1 to 4 and Reference Examples , and Table 1-2 shows the measurement results regarding the absorbent articles produced in Comparative Examples 1 and 2.

(Table 1-1) Examples 1-4 and reference examples

(Table 1-2) Comparative Examples 1 and 2

From the results shown in Table 1, the following became clear.
(A) Thickness is an index indicating a feeling of wearing at the time of wearing. Examples 1-4 were all 5 mm or less in thickness, and were clearly thinner than the comparative example 1, and the comparative example 2 was substantially the same level as Examples 1-4 .
(B) Absorption rate is one of the absorption performances and affects leakage during wearing. In the total value of the absorption rate from the 1st time to the 3rd time, all of Examples 1 to 3 were 120 seconds or less, which was significantly superior to Comparative Example 2. Examples 1 to 3 were almost the same level as Comparative Example 1.
(C) Liquid return is one of the absorption performances and represents the dry feeling when worn, and affects comfort and rash. The amount of liquid return 10 minutes after injection of 120 ml of physiological saline is preferably 1.0 g or less. Furthermore, it is more preferable that it is 0.2 g or less. Examples 1-4 were 0.2 g or less.

  From the above, in Examples 1 to 4, the absorption rate, liquid return, and total absorption amount equal to or higher than those of conventional absorbers using fluffs and water-absorbing resins can be achieved in a thin shape. It was revealed that the absorber was excellent in leakage and dry feeling after water absorption.

  As mentioned above, although this invention was demonstrated using embodiment, it cannot be overemphasized that the technical scope of this invention is not limited to the range as described in the said embodiment. It will be apparent to those skilled in the art that various modifications or improvements can be added to the above embodiment. Further, it is apparent from the description of the scope of claims that embodiments with such changes or improvements can also be included in the technical scope of the present invention.

DESCRIPTION OF SYMBOLS 1 Absorbent article 11 Light incontinence pad 12 Top sheet 13 Back sheet 18 Side leak-proof part 2 Top sheet 3 Back sheet 4 Water absorbent sheet 41 Upper hydrophilic nonwoven fabric 42 Primary water absorbent layer 43 Intermediate hydrophilic nonwoven fabric 44 Secondary water absorbent layer 45 Lower part Hydrophilic non-woven fabric 5 Water-absorbing fiber layer 6 Absorber 7 Liquid diffusive sheet
8 Side leakage prevention part

Claims (6)

An absorbent article comprising an absorbent body having a water absorbent sheet and a water absorbent fiber layer in order from the top sheet side between a top sheet made of a liquid permeable sheet and a back sheet made of a liquid impermeable sheet. ,
The thickness is 4 mm or less,
The water absorbent sheet contains, in order from the top sheet side, an upper hydrophilic nonwoven fabric, a primary water absorbent layer containing a water absorbent resin A and an adhesive, an intermediate hydrophilic nonwoven fabric, a water absorbent resin B and the adhesive. A secondary water-absorbing layer and a lower hydrophilic nonwoven fabric,
The total content of the water absorbent resin A and the water absorbent resin B in the water absorbent sheet is 100 to 1000 g / m ² ,
The absorbent article, wherein the water-absorbent fiber layer is made of only a wood pulp-based airlaid nonwoven fabric.   The absorbent article according to claim 1, wherein the water-absorbing fiber layer has a water absorption amount of 5 g / g or more. The absorbent article according to claim 1 or 2 , wherein a total of three repetition absorption speeds is 120 seconds or less. The absorbent article according to any one of claims 1 to 3 , further comprising a pair of side leakage preventing portions on both sides in the longitudinal direction. A liquid diffusive sheet is further provided between the top sheet and the absorber, and the liquid diffusible sheet is a hydrophilic nonwoven fabric having a thickness of 0.5 mm or more and a basis weight of 25 g / m ² or more. The absorbent article according to any one of claims 1 to 4 , wherein the absorbent article is provided. The absorption rate of the water-absorbent resin A contained in the primary water-absorbing layer constituting the water-absorbing sheet is 30 to 70 seconds in terms of Vortex method absorption rate,
The absorption rate of the water-absorbing resin B contained in the secondary water-absorbing layer constituting the water-absorbing sheet is 1 to 30 seconds in terms of Vortex method absorption rate,
The absorbent article according to any one of claims 1 to 5 , wherein the difference between the two is at least 10 seconds or more.

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