KR100510218B1 - An absorbent structures - Google Patents

Abstract

The present invention relates to an absorbent useful as a material for personal care products, comprising: [iii] a liquid permeable top sheet (1) consisting of a nonwoven fabric or tissue, and [ii] an absorbing layer (2) consisting of pulp, absorbent resin, and a binder; It has a structure in which the back layer 3 which consists of tissues is laminated one by one, and the absorption ability with respect to 0.9% physiological saline of the water absorbing resin contained in the said absorption layer 2 is 45 g / g or less. The present invention can rapidly absorb, distribute and store body fluids that are intermittently added repeatedly within a relatively short time. As a result, even when the wet absorbent body is pressed by the human body, the body fluid can be prevented from flowing back to the human body, which is useful for various personal care products such as diapers and incontinence pads.

Description

Absorbent structures

The present invention relates to an absorber. More specifically, the present invention relates to an absorbent body that is used as a material for personal hygiene absorbent articles such as various diapers, training pants, and urinary incontinence pads in order to effectively absorb the body fluid repeatedly discharged in a relatively short time.

More specifically, in order to solve the disadvantages inevitably caused by the recent thinning of personal hygiene absorbent articles, an absorbent resin having an absorption capacity of 0.9 g or less of saline of 45 g / g or less in the absorbent layer, and the absorbent layer has a two-layer structure. The present invention relates to an absorber, which is contained in the upper layer of the absorber layer close to the human body.

Personal hygiene absorbent articles such as diapers, training pants, and urinary incontinence pads usually include a liquid permeable top sheet that directly contacts the wearer's skin when worn, and the bottom thereof includes fluff pulp and absorbent resin. Absorbing layer, the bottom is composed of a back layer that serves as a container so that the fluid discharged from the human body sucked into the absorber does not flow to the outside. Among the components of these personal care absorbent articles, the liquid permeable top sheet is the most widely used synthetic nonwoven fabric so that body fluid can quickly pass through the absorbent body.

The absorbent layer, which is the core of the personal care absorbent articles above, absorbs and retains body fluids to rapidly absorb the body fluids passing through the liquid permeable topsheet and prevents the absorbed body fluids from contacting the skin again. (I) Fluff pulp obtained by pulverizing wood pulp on the web of the present invention, and (ii) absorbent resins prepared using starch graft copolymers, crosslinked carboxymethylcellulose derivatives, modified hydrophilic acrylates, or the like. It has been produced in such a way that after being distributed nonuniformly, water is added thereto and then compressed to improve the strength of the absorber.

Absorbents produced by such a conventional manufacturing method has a drawback of poor breathability due to the thick thickness, thereby reducing the freshness, it is likely to cause side effects such as itching and rash when worn for a long time, and has a large volume is inconvenient to carry.

 In order to solve these shortcomings, the sanitary napkin industry has recently adopted a method of thinning the absorbent layer of the sanitary napkin and introducing a liner and a backing layer on the upper and lower portions thereof. Specifically, technological progress is being made in the direction of improving the wearing comfort in meeting the basic performance of the diaper, and as one method for this, an ultra-thin diaper has appeared by making the absorber thinner.

An easy way to make ultra-thin diapers is to reduce the amount of pulp occupying a large volume and to increase the amount of absorbent resin. In this case, if the ratio of the mixture content of pulp and absorbent resin is not appropriate or the strength of the absorbent is weak, the shape of the absorbent may be distorted due to long periods of wear or a large increase in the wearer's range of motion or movement. do.

In addition, due to an improper mixing ratio between the pulp and the absorbent resin, the absorbent absorbing rate is lowered or the body fluid urine absorbed by the absorbent is concentrated on a part of the absorbent, resulting in the aggregation of the absorbent.

Specifically, sanitary napkins made of conventional densified absorbents are intermittently repeated within a relatively short period of time, and fluids that are injected are not delivered to the absorbents smoothly and remain in the excreted area, resulting in leakage of body fluids that are subsequently excreted. Because of the lack of aeration, not only the excretion area of the body fluid but also the area away from it does not reduce the humidity, which causes side effects such as rashes.

An object of the present invention is to provide an absorbent that can absorb the body fluid quickly and safely, while being thin and light, to solve the problems of the conventional absorbent. Specifically, it is to improve the usability of the absorber by improving the spreadability of urine urine absorbed by the absorber and to be evenly absorbed by the absorber, and to reduce the amount of bleeding from the absorber to prevent skin sores.

In order to achieve the above object, the absorbent body of the present invention is a liquid permeable top sheet 1 composed of a nonwoven fabric or tissue, an absorbent layer 2 composed of pulp, an absorbent resin, and a binder, and a back layer 3 composed of tissue, which are stacked in this order. The absorptive body of the present invention is characterized in that the absorptive capacity to the 0.9% physiological saline of the absorbent resin contained in the absorbent layer 2 is 45 g / g or less.

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

First, the absorbent of the present invention is an absorbent layer (2) consisting of pulp, absorbent resin and binder between the liquid permeable top sheet (1) composed of nonwoven fabric or tissue and the back layer (3) composed of tissue as shown in FIGS. Have an arranged cross-sectional structure. The absorbent layer 2 may be formed as one layer as shown in FIG. 1, and as shown in FIGS. 2 to 3, the upper layer 2a and the rear layer 3 of the absorbent layer positioned directly below the top sheet 1 may be formed. It may be a two-layer structure consisting of the lower layer 2b of the absorbing layer located at the upper end. The upper layer 2a of the absorber layer is a part which comes into contact with the human body when using the absorber.

In the case where the absorbent layer 2 is formed of one layer as shown in FIG. 1, the absorbent capacity of the absorbent resin contained in the absorbent layer 2 is 45 g / g or less, more preferably 30 to 45 g / g. When the absorbent capacity of the absorbent polymer is out of the above range, it is impossible to safely store the absorbed and diffused body fluid rapidly and then store it safely.

In the present invention, the absorbency of the absorbent resin means absorbency for 0.9% physiological saline, and a specific method for measuring the same will be described later.

On the other hand, when the absorbent layer 2 is formed of two layers as shown in Figs. 2 to 3, the absorbent capacity of the absorbent resin contained in the upper layer 2a of the absorbent layer is 45 g / g or less, more preferably 30 to 45 g /. g, and the absorbent capacity of the water absorbent resin contained in the lower layer 2b of the absorbent layer is 50 g / g or more, more preferably 50 to 70 g / g.

If the absorbent capacity of the absorbent resin contained in the upper layer 2a or the lower layer 2b of the absorbent layer is out of the above range, it is impossible to safely store and diffuse the bodily fluid repeatedly and then store it safely.

On the other hand, between the upper layer (2a) and the lower layer (2b) of the absorbing layer, a nonwoven fabric layer or tissue layer 4 is selectively arranged as shown in FIG.

In the present invention, a starch graft copolymer, a crosslinked carboxymethyl cellulose derivative, a modified hydrophilic acrylate, or the like is used as the absorbent resin constituting the absorbent layer 2. In addition, a thermally active resin, a thermally active fiber, etc. are used as a binder.

Specific examples of the thermally active resin include ethylene vinyl acetate copolymer (EVA), polyethylene resin, or a mixture thereof. Thermally active fibers include polyethylene resins (PE) and polyester resins (PET), polyethylene resins (PE) and polypropylene resins (PP), polypropylene resins (PP) and polyester resins (PET), modified polyester resins (modified PET) and polyester resins (PET) are used in the form of multi-fiber composite fibers spun in various forms.

The shape of the composite fiber is a side-by-bye, one component is arranged in the center or eccentric position of the cross-section of the fiber and the other one is wrapped around the core (Sheath Core Type), the two components alternately arranged side by side Side by Side Type and the like.

Since the binder has two resin components having different melting points from each other, one component having a relatively low melting point is melted within a predetermined temperature range of about 90 to 160 ° C to bond the binder and the nonwoven fabric / tissue. And, the remaining one component having a relatively high melting point does not melt and serves to maintain the form of the binder as it is.

In the method for producing the absorbent body of the present invention, the absorbent layer 2 is prepared by applying a composition in which pulp, absorbent resin and binder are uniformly mixed on the back layer 3 which is a tissue and then drying in an oven. In this case, when the absorbent layer 2 is a single layer as shown in FIG. 1, the composition is applied once and the absorbent layer 2 is completed. However, when the absorbent layer 2 is a multilayer (two layers) as shown in FIGS. The absorption layer 2 is completed by the process of apply | coating the said composition twice.

In the case of FIG. 1, an absorbent resin having an absorbent capacity of 45 g / g or less is used. In FIG. 2, the above-mentioned composition containing an absorbent resin having an absorbent capacity of 50 g / g or more is first applied and dried on the back layer 3, which is a tissue, to absorb the absorbent layer. The lower layer 2b is formed first, and then the composition containing an absorbent resin having an absorbent capacity of 45 g / g or less is subsequently applied and dried to form the upper layer 2a of the absorbent layer.

In the case of FIG. 3, a tissue or nonwoven fabric is adhered to the lower layer 2b of the absorbent layer using a hot melt (adhesive), and then the upper layer 2a of the absorbent layer is formed thereon as described above.

Next, the upper sheet 1 is formed by adhering a tissue or a nonwoven fabric using a hot melt (adhesive) on the absorbent layer 2 or the upper layer 2a of the absorbent layer formed as described above to manufacture the absorbent of the present invention. The process of forming the top sheet 1 may be omitted depending on the manufacturing process.

The absorbent of the present invention prepared as described above has a relatively low absorption capacity of the absorbent resin present in the portion in contact with the human body.

As a result, the absorbent body of the present invention, when the body fluid is repeatedly introduced into a certain position of the absorbent body from the human body, the pulp which is located around the body fluid flowed in beyond the absorbent capacity of the absorbent resin as a medium of the other parts that do not absorb the body fluid Transfer to the absorbent resin is to absorb the body fluid in a larger area of the absorber.

On the contrary, the conventional absorbent having high absorbent capacity of the absorbent resin present in the contacting part of the human body absorbs it when the body fluid is repeatedly introduced into a certain position of the absorbent body, and is then transported and stored in the back layer.

As a result, excess body fluid is stored in the back layer of the conventional absorbent resin, and when the absorber is pressed by the human body, the body fluid stored from the absorber flows back toward the human body, resulting in poor comfort and side effects such as itching and rashes when worn for a long time. Occurred.

However, since the absorber of the present invention absorbs the body fluid in the absorbent layer 2 having a larger area as described above, the amount of the body fluid transferred and stored in the back layer 3 can be significantly reduced. Thus, the absorbent body of the present invention can effectively prevent the phenomenon that the body fluid stored from the absorber back to the human body when the absorber is pressed by the human body.

In the present invention, various physical properties of the absorber are evaluated by the following method.

Area of absorption (%) for physiological saline

80 g of 0.9% physiological saline is added to the center of the absorber at a rate of 7 ml / sec, and the area of the physiological saline is measured after all physiological saline is inhaled on the surface. And the area occupancy is calculated by dividing this by the total area of the absorber to measure the primary absorption area occupancy. The primary absorption area occupancy is measured, and after 5 minutes, the secondary absorption area occupancy is measured in the same manner as above using 80 g of 0.9% physiological saline. The second absorption area occupancy is measured, and after 5 minutes, the third absorption area occupancy is measured using the same method as above using 80 g of 0.9% physiological saline. In this case, the high absorption area occupancy means that the absorber is efficiently used to prevent leakage of body fluids, and when the pressure is applied by the human body, the amount of the absorbed body is reduced to give a pleasant feeling.

· Absorption rate to physiological saline

80 g of 0.9% physiological saline is added to the absorber at a rate of 7 ml / sec, and the time (seconds) at which the physiological saline is inhaled on the surface is measured and recorded. At this time, the lower the value is considered to be excellent surface absorption and transmittance to the saline solution. The first absorption rate was measured by adding 80 g of 0.9% physiological saline to the absorber for the first time, and after 5 minutes, the absorption time of physiological saline was measured by injecting the absorbent on 80 g of 0.9% physiological saline to the second absorption rate. Shall be. Finally, after 5 minutes, 80 g of 0.9% saline is added and the inhalation time is measured to be the third absorption rate. At this time, the fast absorption rate means that the body fluid discharged from the human body is quickly absorbed by the absorber and gives a pleasant feeling.

Surface dryness to physiological saline (g)

80 g of 0.9% physiological saline was added to the absorber at a rate of 7 ml / sec to inhale all the physiological saline onto the surface. After leaving the sample for 5 minutes at room temperature, 10 sheets of filter paper were 0.3 pounds / inch ² (hereinafter referred to as "psi"). Press for 3 minutes and record the amount on the filter paper, which is the primary surface dryness (rewet). After leaving the absorber having the primary surface dryness measured at room temperature for 5 minutes, the same procedure as the primary surface dryness measurement method was repeated to measure the secondary surface dryness. Finally, after leaving the absorber measuring the secondary surface dryness at room temperature for 5 minutes, the same process as the primary surface dryness measurement method is repeated to measure the tertiary surface dryness. At this time, the lower the value is considered to be excellent surface dryness. In summary, the higher the absorption rate, the larger the absorption area, and the lower the surface dryness, the better the physical properties of the absorber.

Measurement of water absorption and water retention of absorbent resin

 Two 150mm × 200mm nonwoven bags made of Thermal Bond nonwoven are made and 1 g of absorbent resin is placed in one nonwoven bag. Now, two non-woven bags are immersed in 100 g of 0.9% saline for 10 minutes, then taken out and suspended for 5 minutes to remove excess moisture by gravity. After measuring the weight (W2) of the nonwoven bag including the swollen absorbent resin (W2) and the weight (W1) of the nonwoven bag without the absorbent resin, respectively, these measured values were substituted into the following equation to obtain the absorbent resin. Calculate the absorbency.

          Absorption Capacity (g / g) = W2-W1-Absorbent Resin Weight (1g)

After dehydrating the above nonwoven bags for 5 minutes using a centrifuge, the weight of the nonwoven bag containing absorbent resin (W3) and the weight of the nonwoven bag without absorbent resin ( After each measurement of W4), the water retention capacity of the water absorbent resin is calculated by substituting these measured values into the following equation.

         Water retention capacity (g / g) = W3-W4-Absorbent resin weight (1 g)

Hereinafter, the present invention will be described in more detail with reference to Examples and Comparative Examples. However, the present invention is not limited only to the following examples.

Example 1

On a tissue having a basis weight of 12 g / m 2, 145 g / m 2 of pulverized pulp, 2 deniers of fineness, and 29 g / m 2 of fiber (binder) combined with polyethylene (PE) and polypropylene (PP) and 0.9% physiological saline. 260 g / m 2 of acrylate sodium salt absorbent resin (Songwon Industrial HS-701S) having a water absorption capacity of 43 g / g and water retention capacity of 24 g / g is uniformly dispersed and applied. Apply hot melt 2g / ㎡ thereon and cover the tissue having a basis weight of 12g / ㎡. Subsequently, it was dried in a drier at 150 ° C. for 1 minute to prepare a final absorbent having a basis weight of 450 g / m 2, a density of 0.25 g / cm 3, and a thickness of 1.8 mm. The results of evaluating various physical properties of the prepared absorbers by the method described above are shown in Table 1.

Example 2

106g / m2 of pulp pulverized on a tissue having a basis weight of 12g / m2, 3 deniers of fineness, and polyethylene (PE) and polyester (PET) composite fiber (binder) absorbed by 21g / m2 and 0.9% saline 159 g / m 2 of acrylate sodium salt absorbent resin (Songwon Industrial HS-800) having this capacity of 65 g / g and water retention capacity of 34 / g was uniformly dispersed, and a tissue having a basis weight of 12 g / m 2 was covered thereon. Subsequently, the pulp pulverized thereon was 45 g / m 2 and the fineness was 3 denier. The fiber (binder) in which polyethylene (PE) and polyester (PET) were mixed was absorbed in 9 g / m 2 and 0.9% physiological saline. And water-retaining ability of 23 / g acrylate sodium salt absorbent resin (Songwon Industrial HS-701S) 68g / ㎡ uniformly dispersed coating. A nonwoven fabric of 24 g / m 2 basis weight prepared by the air throw method was covered thereon, and dried at 120 ° C. for 2 minutes to prepare a final absorber having a basis weight of 456 g / m 2, a density of 0.23 g / cm 3, and a thickness of 2.0 mm. The results of evaluating various physical properties of the prepared absorbers by the method described above are shown in Table 1.

Example 3

89 g / m2 of pulp pulverized on a 12 g / m2 tissue and a fiber (binder) in which polyethylene (PE) and polyester (PET) are combined are absorbed by 26 g / m2 and 0.9% physiological saline and 55 g / g. 133 g / m2 of acrylate sodium salt absorbent resin (Songwon Industries HS-800) of silver 35 / g was uniformly dispersed, and thereafter 59 g / m 2 of pulverized pulp, polyethylene (PE) and polyester (PET) Evenly disperse 89 g / m2 of acrylate sodium salt-absorbent resin (Songwon Industrial HS-701S) having 45 g / g of water absorption capacity and 25 / g water retention capacity of 18 g / m 2 and 0.9% physiological saline of the composite fiber (binder). Apply. Subsequently, a 24 g / m 2 nonwoven fabric prepared by an air throw method was covered and dried at 150 ° C. for 3 minutes to produce a final absorbent having a basis weight of 450 g / m 2, a density of 0.28 g / cm 3, and a thickness of 1.6 mm. The results of evaluating various physical properties of the prepared absorbers by the method described above are shown in Table 1.

Example 4

On a tissue having a basis weight of 12 g / m 2, 133 g / m 2 of pulverized pulp, 6 g / m 2 of ethylene vinyl acetate copolymer (EVA), 7 g / m 2 of polyethylene resin, and 43 g / g of 0.9% physiological saline are water-retaining ability. 200 g / m 2 of acrylate sodium salt absorbent resin (Songwon Industrial HS-701S), which is 24 g / g of silver, is uniformly dispersed and applied. Apply hot melt 2g / ㎡ thereon and cover the tissue having a basis weight of 12g / ㎡. This was then dried in a drier at 150 ° C. for 1 minute to produce a final absorbent having a basis weight of 370 g / m 2, a density of 0.21 g / cm 3, and a thickness of 1.8 mm. The results of evaluating various physical properties of the prepared absorbers by the method described above are shown in Table 1.

Comparative Example 1

On tissues having a basis weight of 12 g / m 2, 145 g / m 2 of pulverized pulp, 2 deniers, and 29 g / m 2 of fiber (binder) combined with polyethylene (PE) and polypropylene (PP) and 0.9% physiological saline. 260 g / m2 of acrylate sodium salt absorbent resin (Songwon Industrial HS-800) having a water absorption capacity of 55 g / g and a water retention capacity of 30 g / g is uniformly dispersed and applied. Subsequently, 2 g / m 2 of hot melt is applied thereon and a tissue having a basis weight of 12 g / m 2 is covered. Subsequently, it was dried in a drier at 150 ° C. for 1 minute to prepare a final absorbent having a basis weight of 450 g / m 2, a density of 0.25 g / cm 3, and a thickness of 1.8 mm. The results of evaluating various physical properties of the prepared absorbers by the method described above are shown in Table 1.

Comparative Example 2

106g / m2 of pulverized pulp on a tissue having a basis weight of 12g / m2, 3 deniers, and a fiber (binder) combined with polyethylene (PE) and polyester (PET) absorbed at 21 g / m 2 and 0.9% saline 159 g / m2 of this acrylate sodium salt absorbent resin (Songwon Industrial HS-800) having a thickness of 65 g / g and water retention capacity of 34 g / g was uniformly dispersed, and then covered with a tissue of 12 g / m 2 thereon and crushed thereon. Pulp 45g / m2, fineness of 3 denier, polyethylene (PE) and polyester (PET) composite (binder) 9g / m2 and 0.9% physiological saline absorption capacity of 65g / g and water retention capacity of 34 / 68 g / m 2 of acrylate sodium salt absorbent resin (Songwon Industrial HS-800), which is g, is uniformly dispersed and applied. Subsequently, a 24 g / m 2 nonwoven fabric produced by the air throw method was covered thereon, and dried at 120 ° C. for 2 minutes to produce a final absorbent having a basis weight of 456 g / m 2, a density of 0.23 g / cm 3, and a thickness of 2.0 mm. do. The results of evaluating various physical properties of the prepared absorbers by the method described above are shown in Table 1.

Comparative Example 3

Pulps pulverized on 12 g / m 2 tissues, 148 g / m 2, fineness of 6 denier, and polyethylene (PE) and polyester (PET) combined fibers (binder) 44 g / m 2 and absorption capacity of 0.9% physiological saline 55 g / m 2 g and a water-retaining ability of 35 / g acrylate sodium salt absorbent resin (Songwon Industrial HS-800) 222 g / ㎡ uniformly dispersed, and then covered with a 24 g / ㎡ nonwoven fabric produced by the air throw method at 150 ℃ Drying for 3 minutes yields a final absorbent body having a basis weight of 450 g / m 2, a density of 0.28 g / cm 3, and a thickness of 1.6 mm. The results of evaluating various physical properties of the prepared absorbers by the method described above are shown in Table 1.

Comparative Example 4

133 g / m2 of pulverized pulp on tissue having a basis weight of 12 g / m2, 6 g / m2 of ethylene vinyl acetate copolymer (EVA), 7 g / m2 of polyethylene resin, and 65 g / g of water absorption capacity of 0.9% physiological saline and 34 g of water retention capacity 200 g / m 2 of acrylate sodium salt absorbent resin (Songwon Industrial HS-800), which is / g, is uniformly dispersed and applied. Apply hot melt 2g / ㎡ thereon and cover the tissue having a basis weight of 12g / ㎡. This was then dried in a drier at 150 ° C. for 1 minute to produce a final absorbent having a basis weight of 370 g / m 2, a density of 0.21 g / cm 3, and a thickness of 1.8 mm. The results of evaluating various physical properties of the prepared absorbers by the method described above are shown in Table 1.

Table 1 Evaluation of absorber properties

division Absorption Area Ratio (%) Penetration time Surface Dryability (g) Primary Secondary 3rd Primary Secondary 3rd Primary Secondary 3rd Example 1 50 70 90 1 minute 30 seconds 1 minute 45 seconds 2 minutes 10 seconds 2.6 7.7 14.9 Example 2 44 48 83 1 minute 40 seconds 1 minute 59 seconds 2 minutes 30 seconds 1.6 9.3 16.8 Example 3 45 60 82 1 minute 30 seconds 1 minute 49 seconds 2 minutes 05 seconds 2.0 8.4 17.3 4 to implementation 50 58 75 1 minute 50 seconds 2 minutes 10 seconds 3 minutes 10 seconds 3.1 16.5 21.4 Comparative Example 1 30 40 50 1 minute 40 seconds 2 minutes 50 seconds 5 minutes 01 seconds 2.7 15.0 27.3 Comparative Example 2 40 43 49 1 minute 39 seconds 2 minutes 11 seconds 4 minutes 42 seconds 1.8 15.0 27.3 Comparative Example 3 47 50 53 1 minute 27 seconds 3 minutes 30 seconds 7 minutes 08 seconds 1.5 19.3 27.2 Comparative Example 4 28 34 40 1 minute 20 seconds 5 minutes 43 seconds 9 minutes 37 seconds 4.0 21.8 31.2

The absorbent of the present invention contains a water absorbent resin having a low absorption capacity of 45 g / g or less in a portion in contact with the human body, and thus can rapidly absorb, distribute, and store body fluids that are intermittently introduced repeatedly within a relatively short time within a large area of absorbent. have. As a result, the absorbent body of the present invention can effectively prevent a phenomenon in which the absorbed body fluid flows back to the human body even if it is pressed by the human body in the state of absorbing and storing the body fluid, and the comfort is comfortable. Therefore, the absorbent body of the present invention can be usefully used for baby diapers, incontinence pads, and adult diapers.

1 to 3 is a schematic cross-sectional view of the absorber of the present invention

※ Explanation of main parts in drawings

1: top sheet 2: absorber layer 2a: top layer of absorber layer

2b: bottom layer of absorber layer 3: backing layer 4: nonwoven fabric layer or tissue layer

Claims (7)

An absorbent body in which a liquid permeable top sheet (1) composed of a nonwoven fabric or tissue, an absorbent layer (2) composed of a binder made of pulp, an absorbent resin, and a thermally active composite fiber, and a back layer (3) composed of a tissue are sequentially laminated. Absorbent of 0.9% physiological saline of the water absorbing resin contained in (2) is 45 g / g or less, The absorber characterized by the above-mentioned. 2. The absorbent layer (2) according to claim 1, wherein the absorbent layer (2) consists of an upper layer (2a) of an absorbent layer located directly below the upper sheet (1) and a lower layer (2b) of an absorbent layer located directly above the rear layer (3). An absorber, characterized by a layer structure. The absorber according to claim 2, wherein the absorbent of 0.9% physiological saline of the absorbent resin contained in the upper layer (2a) of the absorbent layer located directly below the upper sheet (1) is 45 g / g or less. The absorber according to claim 2, wherein the absorbent of 0.9% physiological saline of the absorbent resin contained in the lower layer (2b) of the absorbent layer located immediately above the rear layer (3) is 50 g / g or more. The absorbent body according to claim 2, wherein a nonwoven fabric layer or a tissue layer (4) is arranged between the upper layer (2a) and the lower layer (2b) of the absorbent layer. The absorbent body according to claim 1 or 2, wherein the water absorbent resin is a starch graft copolymer, a crosslinked carboxymethylcellulose derivative or a modified hydrophilic acrylate. delete