JP6265330B2 - Light incontinence products - Google Patents

Description

  The present invention relates to an absorbent article that is slim, does not leak, and has excellent absorbency. 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.

  Absorbent articles such as disposable urine absorbent pads, panty liners, sanitary napkins, and paper diapers were provided with a liquid-permeable top sheet, a liquid-impermeable back sheet, and a top sheet and a back sheet. A structure having an absorbent layer is generally used. In this case, a mixture of a superabsorbent polymer (SAP) and fluff pulp (hereinafter referred to as “pulp”) or the like is used for the absorbent layer. The user absorbs liquids such as blood and urine into the absorbent article by attaching the absorbent article to the underwear or wearing a pant-type absorbent article.

  Absorbent articles, for example, have many scenes that absorb large amounts of body fluids when worn for a long time, preventing side leakage of body fluids, preventing displacement due to movement, and improving the fit when worn. For this purpose, the composition, structure, etc. for each component have been developed.

  In Patent Document 1, an absorber is provided between a top sheet made of a liquid-permeable sheet and a back sheet made of a liquid-impermeable sheet, and a pair of left and right side flaps are provided in the crotch region and the longitudinal end regions. And an absorbent article in which a water absorbent sheet is laid on the side flaps and a pair of three-dimensional gathers are disposed on both side edges in the longitudinal direction of the absorbent article.

  Patent Document 2 includes an absorbent body including 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. In this absorbent article, the water absorbent sheet includes, in order from the top sheet side, an upper hydrophilic nonwoven fabric, a primary water absorbent layer containing the water absorbent resin A and an adhesive, an intermediate hydrophilic nonwoven fabric, and a water absorbent resin. An ultrathin absorbent article comprising a secondary water-absorbing layer containing an adhesive and a lower hydrophilic nonwoven fabric is disclosed.

JP 2013-116212 A JP 2013-094296 A

  However, the absorbent article disclosed in Patent Document 1 can effectively prevent seepage and leakage from the peripheral part of the absorbent body even after a large amount of urination, although the absorption rate is sufficient. Absent. Moreover, although the absorbent article currently disclosed by patent document 2 is ultra-thin, it is soft and easy to move, the amount of absorption is insufficient.

  This invention is made | formed in view of the said subject, Comprising: It aims at providing the absorbent article which is slim, does not have a liquid leak, and was excellent in the absorptivity.

In order to achieve such an object, the present invention is grasped by the following configuration.
(1) The light incontinence product of the present invention includes a liquid permeable top sheet, a non-liquid permeable back sheet, and a liquid diffusable sheet in order from the top sheet side between the top sheet and the back sheet. A light incontinence product comprising an absorbent body, an upper layer water-absorbent sheet, and a lower layer water-absorbent sheet, wherein the absorbent body is, in order from the top sheet side, an upper hydrophilic nonwoven fabric, a water-absorbent resin, and an adhesive Containing a primary water-absorbing layer, an intermediate hydrophilic nonwoven fabric, a secondary water-absorbing layer containing the water-absorbing resin and the adhesive, and a lower hydrophilic nonwoven fabric, and the lower-layer water-absorbing sheet is 30 g / m. a pulp-containing hydrophilic sheet having ^two or more basis weight, with an area of 110% to 400% or less of the area of the absorbent body, wherein Ri der is 4mm less than the thickness of the light incontinence products, the A top sheet and the liquid expansion And diffusing sheet over the absorbent body, a pair of left and right emboss which is convex toward the inward direction at least in the substantially longitudinal center portion of the light incontinence products, and light incontinence products, wherein Rukoto provided with perforations.

  (2) The absorbent article of the present invention is characterized in that, in the configuration of (1), the upper water-absorbent sheet is a wood fiber sheet.

(3) light incontinence products of the present invention, in the above configuration (1) or (2), liquid-diffusive sheet, is 0.5mm or more thickness, basis weight at 25 g / ^{m 2} or more hydrophilic non-woven It is characterized by being.

  (4) The absorbent article of the present invention is characterized in that, in any one of the constitutions (1) and (3), a pair of side leakage preventing portions are provided on both sides in the longitudinal direction.

  (5) The absorbent article of the present invention is characterized in that, in any one of the constitutions (1) to (4), the upper water-absorbent sheet contains a deodorizing substance.

(6) In the light incontinence product of the present invention, in any one of the constitutions (1) to (5) described above, the lower water-absorbent sheet is tightly entangled with polypropylene non-woven fabric with wood pulp and high binder pressure without using a binder. The sheet is included.

  According to the present invention, it is possible to provide an absorbent article that is slim, does not leak, and has excellent absorbability.

It is a top view of the absorptive article containing the individual packaging bag concerning the present invention. It is an AA line sectional view of the absorptive article of Drawing 1 concerning the present invention. FIG. 2 is a plan view of the developed absorbent article (A) according to the present invention (the two-dot chain line is the outline of the individual packaging bag and the tape). FIG. 2 is a plan view of the developed absorbent article (B) according to the present invention (the two-dot chain line is the outline of the individual packaging bag and the tape). It is a rear view of the developed absorbent articles (A) and (B) according to the present invention (the two-dot chain line is the outline of the individual packaging bag and the tape). It is a BB sectional view taken on the line of the absorbent article in FIG. 2 (two-dot chain lines are individual packaging bags).

(Embodiment)
In order to solve the above problems, embodiments of the present invention (hereinafter referred to as embodiments) will be described in detail below with reference to the accompanying drawings. In the description of the embodiment, the same elements are denoted by the same reference numerals throughout.

  In the present specification, the “longitudinal direction” of an absorbent article or the like indicates a direction across the user when the absorbent article is worn, and the “width direction” of the absorbent article or the like is “ A direction transverse or orthogonal to the “longitudinal direction” is indicated.

  A first embodiment of an absorbent article according to the present invention will be described with reference to FIGS. FIG. 1 is a plan view of an absorbent article according to the present invention in an individual packaging bag. 2 is a cross-sectional view taken along the line AA of the absorbent article of FIG. 1 according to the present invention. FIG. 3A is a plan view of the developed absorbent article (A) according to the present invention (the two-dot chain line is the outline of the individual packaging bag and the tape), and FIG. 3B is the developed absorbent article (B) according to the present invention. FIG. 2 is a plan view (two-dot chain lines are outlines of individual packaging bags and tapes). FIG. 4 is a rear view of the developed absorbent articles (A) and (B) according to the present invention (the two-dot chain line is the outline of the individual packaging bag and tape). FIG. 5 is a cross-sectional view of the absorbent article of FIG. 2 taken along the line BB (two-dot chain line is an individual packaging bag).

  The absorbent article 1 includes a liquid permeable top sheet 2, a liquid diffusible sheet 3, an absorbent body 4, an upper layer water absorbent sheet 5, a lower layer water absorbent sheet 6, and a liquid impermeable back sheet 7. And a three-dimensional gather sheet 11 having an elastic member 10.

  The absorbent article 1 includes a liquid-permeable top sheet 2, a liquid diffusable sheet 3, an absorbent body 4, an upper water absorbent sheet 5, a lower layer water absorbent sheet 6, And a liquid-permeable back sheet 7. A water-repellent three-dimensional gather sheet 11 is disposed beside the liquid-permeable top sheet 2. And each structural member is mutually joined by the adhesive agent etc. in each adjacent part.

The base material of the top sheet 2 of the present embodiment only needs to have liquid permeability such that blood, body fluid, and the like move to the absorption layer. For example, a thermal bond nonwoven fabric represented by an air-through nonwoven fabric, etc. It is formed from materials such as a non-woven fabric, a composite non-woven fabric in which thermal bond / spun bond is laminated, an open film such as an open polyethylene film, a foam film such as polyethylene foam and urethane foam, or a composite sheet in which these are laminated. Among these, from the viewpoint of preventing reversion of urine and the like, an air-through nonwoven fabric and an openable film having a funnel-like cross section are preferable. Moreover, in order to improve liquid permeability, it is preferable to give the top sheet 2 the embossing 21 process and perforation process as shown to FIG. 3A and B. FIG. The processing method can perform a well-known method without a restriction | limiting. The emboss pattern is not particularly limited to straight lines, curves, dots, etc., and the pattern shape is also appropriate for efficient liquid diffusion, such as grid, wave, flower, akon pattern (acorn continuous shape) Selected. In order to reduce irritation to the skin, the top sheet 2 preferably contains a lotion, an antioxidant, an anti-inflammatory component, a pH adjuster, an antibacterial agent, a moisturizing agent and the like. Furthermore, the basic weight of the top sheet 2 is preferably 15 g / m ² or more and 45 g / m ² or less, and more preferably 20 g / m ² or more and 30 g / m ² or less from the viewpoint of strength and workability.

The side leak-proof portion can be provided at both side edges in the longitudinal direction in order to prevent side leakage at the time of wearing. 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 4 with an adhesive or the like so as to prevent the absorbent body 4 from seeping out from the lateral direction. The side leakage preventing part may be a so-called three-dimensional gather sheet 11 that rises three-dimensionally above the absorbent article 1. By providing the elastic member 10 for the three-dimensional gather 11 such as rubber thread along the longitudinal direction, the elastic member 10 has an upright property, and can be deformed to expand and contract in accordance with the body shape of the user. The basis weight of the water-repellent three-dimensional gather sheet 11 is preferably 10 g / m ² or more and 40 g / m ² or less, more preferably 15 g / m ² or more and 25 g / m ² or less.

  In order to promote the diffusion of liquid such as urine to the upper surface of the primary water absorption layer 42, the liquid diffusable sheet 3 can be provided between the top sheet 2 and the absorber 4. The liquid first passes through the top sheet 2 and sequentially diffuses and absorbs into the absorbent body 4, the upper water absorbent sheet 5, and the lower water absorbent sheet 6. 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 3 is provided under the top sheet 2 to promote diffusion, and the liquid can be widely moved to the absorber 4 and can be absorbed efficiently.

Examples of the liquid diffusive sheet 3 include an air-through nonwoven fabric, a point bond nonwoven fabric, a spunbond nonwoven fabric and a meltblown nonwoven fabric, or a composite nonwoven fabric obtained by laminating spunbond / meltblown and spunbond / meltblown / spunbond. In the present invention, an air-through nonwoven fabric that is particularly excellent in preventing liquid return is suitable. The thickness of the liquid diffusable sheet 3 is preferably 0.1 mm or more, and more preferably 0.5 mm or more. The basis weight is preferably 15 g / m ² or more and 80 g / m ² or less, more preferably 25 g / m ² or more and 40 g / m ² or less. If the thickness is less than 0.1 mm or the basis weight is less than 15 g / m ^2, it is not preferable because the liquid is not sufficiently diffused to the entire upper surface of the upper hydrophilic nonwoven fabric 41. The shape of the liquid diffusive sheet 3 is not particularly limited, but is a shape that can completely cover the surface of the upper hydrophilic non-woven fabric 41 so that bodily fluid diffuses throughout the upper hydrophilic non-woven fabric 41. Is preferred.

  The absorbent body 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 include a water-absorbing resin and an adhesive, and by this adhesive, the upper hydrophilic nonwoven fabric 41, the primary water-absorbing layer 42, the intermediate hydrophilic nonwoven fabric 43, and the secondary water-absorbing layer 44. The lower hydrophilic nonwoven fabric 45 is bonded to each other.

  Regardless of whether the primary water-absorbing layer 42 or the secondary water-absorbing layer 44 is used, the median particle diameter of the water-absorbing resin used in the present invention is preferably 100 μm or more and 600 μm or less, and more preferably 200 μm or more and 500 μm or less. From the viewpoint of avoiding the specification of fine powder having poor fluidity as a powder and enhancing the basic performance of the absorbent body 4, the median particle diameter of the water absorbent resin is preferably 100 μm or more, preventing the absorbent body 4 from becoming hard, 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 water-absorbent resin contained in the absorbent body 4 is preferably in the range of 300 g / m ^{2 to} 650 g / m ² , more preferably 400 g / m ^{2 to} 500 g / m ² depending on the required absorption performance. is there. From the viewpoint of exhibiting sufficient absorption performance as the absorbent body 4 and maintaining a smooth feeling after absorption, the total content is preferably 300 g / m ² or more, ultra-thin, soft and easy to move. From the viewpoint, the total content is preferably 650 g / m ² or less.

  As the absorbent resin, known resins can be used, and examples thereof include polyacrylic acid-based, starch-based, and cellulose-based resins.

  The adhesive has a melting point of about 100 ° C. or more and about 180 ° C. or less, a synthetic rubber such as styrene-butadiene-styrene copolymer, styrene-isoprene-styrene copolymer, or ethylene-vinyl acetate copolymer. These olefin-based hot melt adhesives 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 21 to the liquid permeable top sheet 2, the liquid diffusable sheet 3, and the absorbent body 4, the liquid can be efficiently diffused to the entire absorbent body 4, and the water absorbency is further improved. Resin fixation can be strengthened.

  In order to obtain a large amount of absorption, a plurality of absorbers 4 having the above-described configuration can be stacked to form a multistage absorber.

The upper hydrophilic non-woven fabric 41, the intermediate hydrophilic non-woven fabric 43, and the lower hydrophilic non-woven fabric 45 constituting the absorbent body 4 are 20 g / m ² or more, and at least one is preferably a spunlace non-woven fabric. 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 appropriately selected, 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.

  The shape of the absorbent body is not particularly limited as long as it is generally used for absorbent articles such as sanitary napkins, diapers, and urine pads, and examples thereof include a rectangular shape, an hourglass shape, and an I-shape. it can.

The upper water absorbent sheet 5 is preferably a wood fiber sheet. The upper water absorbent sheet 5 has a basis weight of preferably 10 g / m ² or more and 40 g / m ² or less, more preferably 15 g / m ² or more and 25 g / m ² or less.

  In addition to the above configuration, a deodorizing substance having a deodorizing function may be added to the upper water absorbent sheet 5. A sheet in which a deodorizing substance is applied and supported in a wood fiber sheet can be appropriately laminated in the above configuration. As the deodorizing substance, activated carbon, porous polymer, silica gel, zeolite, silver compound and the like can be used. Moreover, the upper layer water-absorbent sheet 5 can be a sheet that has not only a deodorizing function but also an antibacterial function.

  The lower layer water-absorbing sheet 6 is below the absorber 4 and the upper layer water-absorbing sheet 5, and finally absorbs the liquid that has not been absorbed by the absorber 4 and the upper layer water-absorbent sheet 5, and does not return to the upper part. It is for doing so. The lower layer water-absorbent sheet 6 is substantially similar to the outer shape of the absorbent article, and is preferably disposed in the center in the longitudinal direction and the width direction of the absorbent body 4 and larger in the longitudinal direction and the width direction than the outer shape of the absorbent body.

The lower layer water-absorbent sheet 6 is made of hydronit (manufactured by Kimberly Clark, trade name), airlaid nonwoven fabric, or the like, and preferably has a basis weight of 30 g / m ² or more. If the basis weight is less than 30 g / m ² , the water absorption capacity is inferior. The basis weight of the lower layer water absorbent sheet is preferably 30 g / m ² or more and 150 g / m ² or less.

  As disclosed in U.S. Pat. No. 5,284,703, Hydronit is a sheet formed by firmly entwining wood pulp with a polypropylene nonwoven fabric with high water pressure (water jet) without using a binder (adhesive). It is a material with excellent strength and absorbency.

  The air laid nonwoven fabric is formed by dispersing relatively short fibers such as pulp and heat-sealing fibers in the air at random using an air flow, forming them into a bulky sheet, and bonding them with a binder.

  The absorbent body 4 has a shape smaller than the outer shape of the absorbent article 1 in the longitudinal direction and the width direction. The upper water-absorbing sheet 5 and the lower water-absorbing sheet 6 are preferably substantially similar to the outer shape, but may be substantially rectangular. The areas of the upper water-absorbent sheet 5 and the lower-layer water-absorbent sheet 6 are preferably larger than the absorbent body 4 and arranged in the center in the longitudinal direction and the width direction.

As the liquid-impermeable sheet used for the back sheet 7, a polyethylene film or a laminate of a polyethylene film and a nonwoven fabric can be used, and the basis weight thereof is not particularly limited. The backsheet 7 has a basis weight of preferably 15 g / m ² or more and 60 g / m ² or less, and more preferably 30 g / m ² or more and 40 g / m ² or less.

  The top sheet 2 and the back sheet 7 are fixed using a hot melt adhesive over the entire circumference. A method for applying the hot melt adhesive is not particularly limited, and 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 applied to the contact method.

An SBS type hot melt 8 is arranged under the back sheet 7 so that it can be adhered to the underwear, and a silicon release paper 9 which is a silicon paper is arranged below the hot melt 8 so as to match the length of the hot melt 8 to prevent misalignment. Arrange. The basis weight of the silicon release paper 9 is preferably 20 g / m ² or more and 70 g / m ² or less, more preferably 40 g / m ² or more and 50 g / m ² or less.

As shown in FIG. 1, the individual wrapping sheet 12 is arranged under the silicone release paper 9, the front and back of the crotch are folded back and folded into three, and the tab tape 13 is attached so that the individual wrapping sheet 12 does not open. The basis weight of the tab tape 13 that is arranged in the center in the width direction and adheres both ends of the individual packaging sheet 12 by heat sealing is preferably 60 g / m ² or more and 100 g / m ² or less, more preferably 80 g / m ² or more and 90 g / m. m ² or less. The basis weight of the individual packaging sheet 12 is preferably 10 g / m ² or more and 60 g / m ² or less, and more preferably 15 g / m ² or more and 25 g / m ² or less.

  With the above configuration, the absorbent article has a thickness of 5 mm or less (measurement method will be described later), a total of three times of absorption speed is 120 seconds or less, and can realize performance with less liquid return. 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 1-3, as the top sheet 2 of the basis weight of 20 g / ^{m 2} air-through nonwoven fabric, air-through nonwoven fabric having a basis weight of 30 g / ^{m 2} as liquid-diffusing sheet 3, as the back sheet 7 having a basis weight of 32 g / ^{m 2} A breathable polyethylene film is used as a common member, and the size of the product, the structure of the absorbent body 4, and the structure of the lower layer water absorbent sheet 6 are different.

Example 1
In this example, the absorbent article 1 is a liquid-permeable top sheet 2, a liquid-impermeable back sheet 7, and between the top sheet 2 and the back sheet 7 in order from the top sheet 2 side, The absorbent article includes an absorbent body 4, an upper layer water absorbent sheet 5, and a lower layer water absorbent sheet 6. The absorbent article 1 has a product length L of 230 mm and a width (W1 / W2 / W3) of 95/85/95 mm. The absorber 4 has a length of 135 mm and a width of 60 mm. When measuring the water absorption rate, the amount of physiological saline dropped is 5 ml. The amount of physiological saline dropped when measuring the reverse flow rate is 60 ml.

(Example 2)
In this example, the configuration is the same as that of Example 1, but the length of the absorber 4 is 180 mm. The dropped amount of physiological saline when measuring the water absorption rate is 10 ml, and the dropped amount of physiological saline when measuring the reverse flow rate is 110 ml.

(Example 3)
In this embodiment, the absorbent article 1 includes a liquid-permeable top sheet 2, a liquid-impermeable back sheet 7, and the top sheet 2 and the back sheet 7, in order from the top sheet 2 side. The absorbent article 1 includes an absorbent body 4, an upper layer water absorbent sheet 5, and a lower layer water absorbent sheet 6. The absorbent article 1 has a product length L of 270 mm and a width (W1 / W2 / W3) of 110/100/120 mm. The absorber 4 has a length of 230 mm and a width of 75 mm. When measuring the water absorption rate, the amount of physiological saline dropped is 20 ml. The amount of physiological saline dropped when measuring the reverse flow rate is 160 ml.

    Examples 1 to 3 are different from Comparative Examples 1 to 3 in the presence or absence of a lower layer water-absorbent sheet.

(Comparative Example 1)
In this comparative example, the point which does not have a lower layer water-absorbent sheet as the absorbent article 1 is different from the example 1, but the other configuration is the same as that of the example 1, and the measurement conditions are also the same.

(Comparative Example 2)
In this comparative example, the point which does not have the lower layer water-absorbent sheet 6 as the absorbent article 1 is different from the example 2, but the other configuration is the same as that of the example 2, and the measurement conditions are also the same.

(Comparative Example 3)
In this comparative example, the point which does not have the lower layer water-absorbent sheet 6 as an absorbent article differs from Example 3, but it is the same structure as Example 3 except that, and measurement conditions are also the same.

  About the absorbent article produced in Examples 1-3 and Comparative Examples 1-3, each physical property was measured and compared with the following test methods.

(Measuring method)
(Absorbing layer thickness)
The thickness of the absorption layer was measured using a height gauge (manufactured by Mitutoyo Corporation). The thickness is measured under a load condition of 35 gf / cm ² . Under a load condition of 35 gf / cm ² , a circular weight (50 mmφ) was placed on the center of the absorption layer, and the thickness up to the upper surface of the weight was measured with a height gauge, and then the thickness of the weight was subtracted.

(Absorption rate 3 times method)
A measuring jig having an inner diameter of 19 mm is opened at the center of a cylinder having a bottom area of 16.8 cm ² and has a weight of 755.6 g. The measuring jig is placed on the center of the absorbent article 1 in the longitudinal direction and the width direction. , Drop 5, 10 and 20 ml of physiological saline from the upper holes, respectively, and start at the point where the liquid is completely sucked into the circumference in the center circle of the jig from when the physiological saline comes into contact with the absorbent article 1 Time is measured (first time). Then, after the elapse of 3 minutes, the same time is measured (second time), and the third time is similarly measured.

(Reverse flow rate)
A filter paper (No. 2 filter paper manufactured by ADVANTEC, diameter 55 mm) was prepared by injecting 60 ml, 110 ml and 160 ml of physiological saline respectively into the longitudinal direction and the widthwise center of the absorbent article 1 and measuring the weight in advance after 1 minute. Is placed at the center of 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 reverse flow rate.

(Total absorption)
The absorbent article 1 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 shows the measurement results regarding the absorbent articles 1 produced in Examples 1 to 3 and Comparative Examples 1 to 3.

From the results shown in Table 1, the following became clear.
(A) The difference between the three-time water absorption speed in Examples 1 to 3 and the three-time water absorption speed in Comparative Examples 1 to 3 is 10.7 seconds, 19 seconds, and 20.4 seconds, respectively. Thus, it is clear that the absorbent article having the lower water absorbent sheet 6 has a higher water absorption rate than the absorbent article not having the lower water absorbent sheet 6.
(B) Comparing the total absorbed amount of Examples 1 to 3 with the total absorbed amount of Comparative Examples 1 to 3, increased by 12.0%, 8.8% and 8.5%, respectively. Thereby, it is clear that the absorbent article having the lower layer water absorbent sheet 6 has a larger total absorption than the absorbent article not having the lower layer water absorbent sheet 6.
(C) The reverse flow rate of Examples 1 to 3 was compared with the reverse flow rate of Comparative Examples 1 to 3, and 41.4%, 24%, and 48.8% decreased, respectively. Thus, it is apparent that the absorbent article having the lower layer water absorbent sheet 6 has a lower back flow rate than the absorbent article not having the lower layer water absorbent sheet 6.

  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 2 Top sheet 21 Emboss 3 Liquid diffusion sheet
4 Absorbent body 41 Upper hydrophilic nonwoven fabric 42 Primary water absorbent layer 43 Intermediate hydrophilic nonwoven fabric 44 Secondary water absorbent layer 45 Lower hydrophilic nonwoven fabric 5 Upper water absorbent sheet 6 Lower water absorbent sheet 7 Back sheet 8 Hot melt 9 Silicone release paper 10 Elasticity Member 11 Solid gather sheet 12 Individual packaging sheet 13 Tab tape L Product length W1 Product width (front)
W2 Product width (crotch)
W3 Product width (rear)

Claims (6)

A liquid-permeable topsheet;
A liquid-impermeable backsheet;
Between the top sheet and the back sheet, in order from the top sheet side, is a light incontinence product comprising a liquid diffusible sheet, an absorber, an upper layer water absorbent sheet, and a lower layer water absorbent sheet,
The absorber contains an upper hydrophilic nonwoven fabric, a primary water-absorbing layer containing a water-absorbing resin and an adhesive, an intermediate hydrophilic nonwoven fabric, the water-absorbing resin and the adhesive in this order from the top sheet side. Having a secondary water absorption layer and a lower hydrophilic nonwoven fabric,
The lower layer water-absorbent sheet is a pulp-containing hydrophilic sheet having a basis weight of 30 g / m ² or more, and has an area of 110% to 400% with respect to the area of the absorber,
It said Ri Der is 4mm less than or equal to the thickness of the light incontinence products,
Wherein said top sheet, said liquid diffusion sheet, over the absorber, a pair of right and left is convex toward the inward direction at least in the substantially longitudinal center portion of the light incontinence products embossing, and Rukoto provided with perforations A light incontinence product . The light incontinence product according to claim 1, wherein the upper water-absorbent sheet is a wood fiber sheet. Before SL liquid diffusing sheet is 0.5mm or more thickness, light incontinence products according to claim 1 or 2 basis weight is characterized by a 25 g / m ² or more hydrophilic non-woven. The light incontinence product according to any one of claims 1 to 3, further comprising a pair of side leakage prevention portions on both sides in the longitudinal direction. The light incontinence product according to any one of claims 1 to 4, wherein the upper water-absorbent sheet contains a deodorizing substance. The said lower layer water-absorbent sheet contains what formed the sheet | seat by entwining the wood pulp to the polypropylene nonwoven fabric firmly at a high water pressure without using a binder . Light incontinence product .

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