JP2019176925A - Absorbent article - Google Patents

Abstract

Provided is an absorbent article that can suppress permeation of excreted water to the outside. An absorbent article includes a front body, a crotch part, and a back body. The absorbent article 100 includes an absorbent body 20 provided over the front body, the crotch part, and the back body and containing a superabsorbent polymer 51 and a fiber material 52. The absorbent body 20 is provided along the longitudinal direction of the absorbent body 20 and has a low content of the highly absorbent polymer 51 and the fibrous material 52. And a second absorbent portion 22 having a higher content of the highly absorbent polymer 51 and the fibrous material 52 than the first absorbent portion 21. [Selection diagram] FIG.

Description

  The present invention relates to an absorbent article.

  Conventionally, absorbent articles such as paper diapers, urine leak pads, and sanitary napkins are known. The absorbent article includes an absorber containing a superabsorbent polymer. Absorbent articles retain liquid moisture such as urine and menstrual blood excreted from the wearer (hereinafter referred to as “excreted moisture”) and solids and other excrement, and leak from the absorbent article. Can be prevented.

  Various techniques have been proposed in order to improve the excretion absorbing performance of the absorbent article. For example, Patent Document 1 discloses an absorbent article in which an absorbent body is provided with a slit portion extending along the longitudinal direction. According to the absorbent article of Patent Document 1, excretion moisture can be diffused through the slit portion penetrating the absorber in the thickness direction, and excretion moisture can be easily absorbed in a wide range in the longitudinal direction of the absorber. It has become.

JP 2017-189243 A

  An object of the present invention is to provide an absorbent article capable of suppressing the permeation of excreted water to the outside. Note that the present invention is not limited to this purpose, and is an operation and effect derived from each configuration shown in the `` Mode for Carrying Out the Invention '' described later, and can also exhibit an operation and an effect that cannot be obtained by the conventional technology. It can be positioned as another purpose.

  The absorbent article disclosed herein is an absorbent article composed of a front body, a crotch part, and a back body, and is provided over the front body, the crotch part, and the back body, and a super absorbent polymer and An absorbent body containing a fiber material, and the absorbent body is provided along the longitudinal direction of the absorbent body, and the first absorbent part having a low content of the superabsorbent polymer and the fiber material, and in plan view A second absorbent part provided on the outer side in the width direction of the first absorbent part and having a higher content of the superabsorbent polymer and the fiber material than the first absorbent part.

  According to the absorbent article shown in the present case, the permeation of excretion moisture to the outside can be suppressed.

It is an expanded view of the urine leak pad regarding 1st embodiment. It is a disassembled perspective view of the urine leak pad regarding 1st embodiment. FIG. 3 is a cross-sectional view taken along the line III-III in FIG. It is sectional drawing of the urine leak pad regarding 2nd embodiment, and shows the location corresponding to the III-III arrow sectional drawing of FIG. It is sectional drawing of the urine leak pad regarding the modification of 2nd embodiment, and shows the location corresponding to the III-III arrow sectional drawing of FIG.

Hereinafter, the form for implementing this case is demonstrated. The following embodiment is merely an example, and there is no intention of excluding various modifications and technical applications that are not explicitly described in this embodiment. Each configuration of the present embodiment can be implemented with various modifications without departing from the spirit thereof. Also,
They can be selected as necessary, and can be appropriately combined.

  The absorbent article described in the embodiment is a sanitary article that is worn by a wearer and absorbs and holds excretion moisture such as urine and feces excreted from the wearer. The absorbent article includes absorbent articles such as a urine leak pad, a sanitary napkin, and a panty liner, in addition to absorbent articles such as tape-type and pants-type paper diapers (so-called “disposable diapers”). In the following embodiment, a urine leak pad is illustrated as an absorbent article. The urine leakage pad is usually used by being attached to the skin facing surface side of the disposable diaper. The urine leakage pad is mainly used by being worn by adults requiring care.

  In this embodiment, about a urine leak pad, let the direction which connects the front body arrange | positioned facing a wearer's abdomen and the back body arrange | positioned facing a back part be a longitudinal direction. Inseam placed between the front body (one side in the longitudinal direction) and the back body (the other side in the longitudinal direction) (center in the longitudinal direction) is placed on the wearer's crotch (placed opposite the crotch) The part is located. In the state where the urine leak pad is worn by the wearer (hereinafter abbreviated as “wearing state”), the side facing the wearer's skin (the inner side in the worn state) is the skin facing surface side, and the skin facing The opposite side (outside) of the surface side is defined as the non-skin facing surface side. Furthermore, a direction connecting the skin facing surface side and the skin non-facing surface side is a thickness direction, and a direction orthogonal to both the longitudinal direction and the thickness direction is a width direction. In addition, viewing from the skin facing surface side in the thickness direction is a plan view. And the width direction in planar view is also called right and left.

  In this specification, for example, the description of a numerical range of “1 to 100” includes both the lower limit value “1” and the upper limit value “100”. This also applies to other numerical range notations. Further, the dimensional ratios in the drawings are not limited to the illustrated ratios.

[I. First embodiment]
[I-1. Constitution]
[I-1-1. Basic configuration]
A basic configuration of the urine leak pad 100 will be described with reference to FIGS. In the cross-sectional view of FIG. 3, the thickness of each sheet is exaggerated for easy understanding of each configuration. In the following description, “urine leak pad” is simply abbreviated as “urine pad”.

  In FIG. 1, the urine pad 100 is formed symmetrically with respect to the center line A in the width direction. The urine pad 100 is roughly divided into three regions, a front body 2, a crotch 3, and a back body 4, along the longitudinal direction. The front body 2 is an area located on the lower abdomen side of the wearer in the mounted state. The back body 4 is an area located on the buttocks side of the wearer in the mounted state. The crotch part 3 is an area located between the front body 2 and the back body 4 and located in the crotch of the wearer in the mounted state. The urine pad 100 has a pair of left and right side flaps that extend from both side edges in the longitudinal direction outward in the width direction from the crotch 3 in the front body 2 and the back body 4.

  As shown in FIG. 3, the urine pad 100 includes at least an absorbent core 40. Furthermore, the urine pad 100 includes an absorbent core 40 having a built-in absorbent core 40 and having a first absorbent portion 21 and a second absorbent portion 22. Furthermore, as shown in FIGS. 2 and 3, the urine pad 100 includes a laminated body 10 having an absorbent body 20 and a sheet laminated on the absorbent body 20. The laminated body 10 includes an absorbent body 20, a top sheet 62 laminated on the skin facing surface side of the absorbent body 20, and a back sheet 63 laminated on the skin non-facing surface side of the absorbent body 20. Furthermore, the side seat | sheet 64 is arrange | positioned at the side (width direction outer side) of the top sheet | seat 62, and the skin opposing surface side. A cover sheet 65 is laminated on the non-skin facing surface side of the back sheet 63. The laminated body 10, the absorbent body 20, and the absorbent core 40 are provided in the longitudinal direction over the front body 2, the crotch 3, and the back body 4. Moreover, the absorber 20 and the absorptive core 40 have the substantially rectangular external shape by planar view.

As shown in FIG. 3, the urine pad 100 includes an absorbent core 40 and a laminated sheet 60 having two or more sheets laminated on the absorbent core 40. The laminated sheet 60 is a sheet that is laminated at least in the center portion in the width direction along the longitudinal direction of the absorbent core 40. The laminated sheet 60 has a wrap sheet 61 that covers the absorbent core 40. Further, the laminated sheet 60 has a top sheet 62 disposed on the skin facing surface side of the wrap sheet 61. In addition, the laminated sheet 60 has a back sheet 63 that is disposed on the skin non-facing surface side of the wrap sheet 61. Further, the laminated sheet 60 has a cover sheet 65 disposed on the skin non-facing surface side of the back sheet 63.
Hereinafter, each component of the urine pad 100 will be described.

[Absorbent core]
The absorbent core 40 is a mat-like (or pad-like) member having liquid absorbency that absorbs and retains excreted moisture.

  As shown in FIG. 3, the absorbent core 40 includes a superabsorbent polymer (SAP (also referred to as a superabsorbent polymer), a superabsorbent polymer or a superabsorbent resin) 51, and a fiber material 52. . The absorbent core 40 is formed by mixing the superabsorbent polymer 51 with the fiber material 52. The fiber material 52 is formed by entwining ultrafine fibers having hydrophilicity. The superabsorbent polymer 51 is normally embedded and held in the fiber material 52 by being mixed with the fiber material 52. The superabsorbent polymer 51 can absorb and retain the liquid diffused by the fiber material 52. Although the content ratio of the superabsorbent polymer 51 and the fiber material 52 is not particularly limited, the ratio of the content of the superabsorbent polymer 51 to the total content of the superabsorbent polymer 51 and the fiber material 52 is usually It is 20 to 80%, preferably 30 to 70%, more preferably 40 to 60%.

<Superabsorbent polymer>
As the superabsorbent polymer 51, various known polymers used as absorbent materials in absorbent articles such as disposable diapers and urine pads can be used. Examples of the superabsorbent polymer 51 include starch systems such as starch-acrylic acid (salt) graft copolymer, saponified starch-acrylonitrile copolymer, saponified starch-ethyl acrylate graft copolymer; sodium Cellulose-based materials such as a crosslinked product of carboxymethylcellulose; synthetic polymer-based materials such as polyacrylic acid (salt), polyethylene oxide crosslinked with acrylic acid, and a crosslinked product of polyvinyl alcohol-maleic anhydride reaction can be used. Among these, from the viewpoint of absorbability, polyacrylic acid (salt) is preferable, and sodium polyacrylate is more preferable. These may be used individually by 1 type and may be used in combination of 2 or more type. The shape of the superabsorbent polymer 51 is not particularly limited, and for example, a granular shape, a powder shape, a pellet shape, a sol shape, a film shape, a fiber shape, and the like can be used.

<Fiber material>
Examples of the fiber material 52 include cellulosic fibers such as pulp fibers, rayon fibers, and cotton fibers; and synthetic fibers such as polyethylene, polypropylene, and polyethylene terephthalate that have been subjected to a hydrophilic treatment. Among these, from the viewpoint of absorbability, it is preferable to use fluff pulp obtained by pulverizing or defibrating fibers or synthetic fibers. These may be used individually by 1 type and may be used in combination of 2 or more type.

〔Absorber〕
The absorbent body 20 is a mat-like member having liquid absorbency like the absorbent core 40 by incorporating the absorbent core 40. As shown in FIGS. 1 to 3, the absorbent body 20 is provided on the outer side in the width direction of the first absorbent portion 21 in a plan view and the first absorbent portion 21 provided along the longitudinal direction of the absorbent body 20 in a plan view. The second absorption part 22 is provided. These absorption parts 21 and 22 are connected.

  As shown in FIG. 3, the absorbent body 20 has an absorbent core 40 and a wrap sheet 61. The absorbent body 20 is formed by encapsulating (wrapping) the absorbent core 40 with a wrap sheet 61. The wrap sheet 61 covers the entire absorbent core 40 including the skin facing surface side and the skin non-facing surface side of the absorbent core 40.

<Lap sheet>
The wrap sheet 61 is a sheet-like member that covers the absorbent core 40. Since the absorbent core 40 is encapsulated by the wrap sheet 61, the regularity of the absorbent core 40 is ensured.

  The wrap sheet 61 can be formed of a known material used for absorbent articles. For example, paper such as tissue paper; spunbond nonwoven fabric, needle punched nonwoven fabric, spunlace nonwoven fabric, air-through nonwoven fabric, SMS (Spunbound Meltblown Spunbound) nonwoven fabric and the like can be used.

[Laminate]
As shown in FIG. 2, the laminated body 10 is a laminated structure in which a top sheet 62 and a back sheet 63 are respectively disposed on both main surface sides of the absorbent body 20. Among these, the top sheet 62 is disposed on the surface of the absorbent body 20 on the skin facing surface side. Further, the back sheet 63 is disposed on the surface of the absorbent body 20 on the non-facing surface side. The laminated body 10 allows the excretion moisture from the skin facing surface side to permeate the top sheet 62, absorbs and retains the excreted moisture permeated by the absorber 20, and leaks to the outside from the skin non-opposing surface side by the back sheet 63. To prevent. The top sheet 62 and the back sheet 63 and the absorbent body 20 can be fixed by a known adhesive such as a hot melt adhesive.

<Top sheet>
The top sheet 62 is a sheet-like member disposed on the most skin facing surface side in the laminate 10. Since the top sheet 62 is provided in the center region in the width direction of the urine pad 100, it is also referred to as a center sheet. As shown in FIG. 3, the top sheet 62 has a width dimension larger than that of the absorbent body 20 and covers the entire surface of the absorbent body 20 from the skin facing surface side. In addition, the top sheet 62 contacts the wearer's skin in a state where the urine pad 100 is attached, and allows the absorbent body 20 to absorb excreted moisture. For this reason, the top sheet 62 is made of a material having water permeability at least partly or entirely. Moreover, it is preferable that the top sheet 62 is made of a highly flexible material for fit in the mounted state. Moreover, in order to suppress the stuffiness in a mounting state, it is preferable to be comprised with the material which has air permeability.

  As a material constituting the top sheet 62, for example, a woven fabric, a nonwoven fabric, a porous film, or the like can be used. Alternatively, as the top sheet 62, a non-woven fabric obtained by subjecting fibers of thermoplastic resin such as polypropylene, polyethylene, polyester, nylon, etc., to hydrophilic treatment may be used. As a nonwoven fabric which comprises the top sheet 62, a spun bond nonwoven fabric, a needle punch nonwoven fabric, a spunlace nonwoven fabric, an air through nonwoven fabric, a melt blown nonwoven fabric, an SMS nonwoven fabric, etc. can be used, for example.

<Back sheet>
The back sheet 63 is a sheet-like member that is disposed on the most skin non-facing surface side in the laminate 10. The back sheet 63 is larger in the width direction than the absorbent body 20 and the top sheet 62, and covers the entire surface of the absorbent body 20 and the top sheet 62 from the skin non-facing surface side. Further, the back sheet 63 prevents excrement from leaking from the absorbent body 20 to the non-skin facing side. For this reason, the back sheet 63 is made of a non-water-permeable material. Further, the back sheet 63 is preferably made of a material having moisture permeability in order to suppress stuffiness in the mounted state.

  As a material constituting the back sheet 63, for example, a thermoplastic resin sheet such as polyethylene or polypropylene can be used. Among them, as the back sheet 63, it is preferable to use a microporous thermoplastic resin sheet in which a plurality of fine pores of 0.1 to 0.4 μm are formed. As such a sheet, for example, a sheet obtained by kneading an inorganic filler in a thermoplastic resin and molding the sheet and then stretching the sheet can be used.

[Side sheet, cover sheet]
The urine pad 100 further includes a side sheet 64 and a cover sheet 65 that are stacked on the stacked body 10. The side sheet 64 is disposed from the width direction side of the laminated body 10 to the skin facing surface side. Further, the cover sheet 65 is disposed on the skin non-facing surface side of the laminate 10. The side sheet 64, the cover sheet 65, and the laminate 10 can be fixed by a known adhesive such as a hot melt adhesive.

<Side sheet>
The side sheets 64 are a pair of left and right members provided on both sides in the width direction in order to form a three-dimensional gather 70 described later on both side portions of the laminate 10. As shown in FIG. 3, the side sheet 64 is provided on each side in the width direction of the top sheet 62 and the back sheet 63. Furthermore, the side sheet 64 is laminated | stacked on the skin opposing surface side from the width direction side of the top sheet 62 and the back sheet 63 to the width direction side part. The side seat 64 stands up in a direction in which the side seat 64 comes into contact with the skin of the wearer by utilizing the contraction of the three-dimensional gather 70 described later.

  The side sheet 64 is preferably made of a non-permeable material in order to prevent liquid leakage to the side in the width direction. As the side sheet 64, a spunbond nonwoven fabric can be used. Further, a part of the side sheet 64 is disposed on the most skin-facing surface side in the urine pad 100 (for this reason, the side sheet 64 is also referred to as a “top sheet” similarly to the top sheet 62). As the side sheet 64 that can come into contact with the wearer in this way, a spunbonded nonwoven fabric with improved flexibility is used by including a meltblown layer, such as an SMS nonwoven fabric or an SMMS (Spunbound Meltblown Meltblown Spunbound) nonwoven fabric. Is preferred. Or it is preferable to use the spunbond nonwoven fabric which improved the softness | flexibility by suppressing the fineness and the fabric weight of the fiber which make a spunbond nonwoven fabric.

The “fineness” is a parameter corresponding to the fiber diameter (thickness) and the cross-sectional area of the fiber, and is represented by the weight per predetermined length. For example, the number of grams per 10,000 m (decitex) for one fiber is used as the “fineness”.
Further, the “weight per unit area” is a parameter corresponding to the thickness of the sheet or the degree of lamination, and is represented by the weight per unit area. For example, the number of grams per square meter is used as the “weight per unit area”.

<Cover sheet>
The cover sheet 65 is a sheet-like member that covers the laminated body 10 from the skin non-facing surface side. The cover sheet 65 is used to reinforce the back sheet 63 and improve the feel (tactile sensation) of the back sheet 63 by being disposed on the non-skin facing surface side of the urine pad 100. The cover sheet 65 is set larger in the width direction than the absorbent body 20, the top sheet 62, and the back sheet 63, and is disposed around the wearer's crotch, buttocks, lower abdomen, and the like in the mounted state.

  Examples of the material constituting the cover sheet 65 include a woven fabric and a non-woven fabric. Especially, it is preferable to use the nonwoven fabric and wet nonwoven fabric which consist of thermoplastic resins, such as polyethylene, a polypropylene, and polyester. In particular, a spunbonded nonwoven fabric can be suitably used as the cover sheet 65 from the viewpoint of flexibility in order to ensure a feeling of touch (hand).

  In the urine pad 100 configured as described above, the members are arranged in the order of the side sheet 64, the top sheet 62, the absorbent body 20, the back sheet 63, and the cover sheet 65 from the skin facing surface side to the skin non-facing surface side. Are stacked. The side sheet 64 and the cover sheet 65 are bonded together by a known adhesive such as a hot melt adhesive.

〔gather〕
The urine pad 100 is provided with a three-dimensional gather 70 in order to improve followability to the wearer in the worn state. The three-dimensional gather 70 is sandwiched between stretchable members (stretchable members) such as rubber, polyurethane, and stretchable film in a stretched state and fixed by hot melt, heat sealing, ultrasonic welding, or the like. It is comprised from the sheet | seat composite_body | complex given the elasticity. The sheet composite is in a state where the sheet is slightly wrinkled by a force (restoring force, elastic force) for returning the elastic member from the stretched state to the original (natural length state). Here, a thread-like rubber member (hereinafter abbreviated as “thread rubber”) 71 is exemplified as the stretchable member.

  The three-dimensional gather 70 is formed by crimping the inner edge of the side sheet 64 in the width direction with the thread rubber 71. The three-dimensional gather 70 is provided in order to prevent leakage of the excrement in the lateral direction of the excrement by enhancing the followability to the wearer at the periphery of the excretion location. As shown in FIG. 1, the three-dimensional gather 70 is disposed on the inner side in the width direction of the side seat 64. As shown in FIGS. 1 and 2, in the three-dimensional gather 70, the rubber thread 71 is provided along the longitudinal direction at the inner edge in the width direction of the side seat 64. Further, as shown in FIG. 3, in the three-dimensional gather 70, the sheet portions 64 </ b> A and 65 </ b> B located at the edge portions on the inner side in the width direction of the side sheet 64 are folded and overlapped. A thread rubber 71 extending in the longitudinal direction is surrounded by the sheet portions 64A and 65B.

[I-1-2. Detailed configuration]
Next, a detailed configuration of the urine pad 100 will be described.

[First absorption part, second absorption part]
The first absorbent portion 21 is a portion of the absorbent body 20 that contains less superabsorbent polymer 51 and fiber material 52 than the second absorbent portion 22. Further, the second absorbent portion 22 is a portion having a higher content of the superabsorbent polymer 51 and the fiber material 52 than the first absorbent portion 21. As shown in FIG. 1, the 1st absorption part 21 is provided in the width direction center along the longitudinal direction of the absorber 20 by planar view. Further, the second absorption portion 22 is provided continuously with the first absorption portion 21 on the outer side in the width direction of the first absorption portion 21 in a plan view. More specifically, the second absorption portion 22 is provided so as to surround the periphery of the first absorption portion 21 provided at the center in the width direction of the absorber 20.

  The content of the superabsorbent polymer 51 and the fiber material 52 in the first absorbent portion 21 is less than that in the second absorbent portion 22. The content of the superabsorbent polymer 51 contained in the first absorbent portion 21 and the fiber material 52 are the same. It means that the absolute amount of the total amount added together with the content of is small. As shown in FIG. 3, the absorbent body 20 having the first absorbent part 21 and the second absorbent part 22 is such that the first absorbent part 21 has a smaller dimension in the thickness direction than the second absorbent part 22. Is an example. Alternatively, the first absorbent portion 21 may be one in which the density of the superabsorbent polymer 51 and the fiber material 52 is lower than that of the second absorbent portion 22. When the first absorbent portion 21 has a smaller dimension in the thickness direction than the second absorbent portion 22, the first absorbent portion 21 is provided by providing a groove-like recess on the skin facing surface side of the absorbent body 20. Preferably it is formed.

  When the first absorbent portion 21 has a smaller dimension in the thickness direction than the second absorbent portion 22, the density of the first absorbent portion 21 and the density of the second absorbent portion 22 are approximately the same, It is preferable that the density is lower than the density of the second absorbent portion 22. Further, when the first absorbent 21 has a lower density of the superabsorbent polymer 51 and the fiber material 52 than the second absorbent 22, the thickness of the first absorbent 21 and the thickness of the second absorbent 22 are the same. It is preferable that the thickness of the first absorbent portion 21 is smaller than the thickness of the second absorbent portion 22. That is, it is more preferable that the first absorbent portion 21 has a lower density of the superabsorbent polymer 51 and the fiber material 52 and a smaller dimension in the thickness direction than the second absorbent portion 22.

  When the first absorbent portion 21 is smaller in the thickness direction than the second absorbent portion 22, the thickness of the first absorbent portion 21 relative to the thickness of the second absorbent portion 22 is usually 80% or less, preferably 60% or less. It is preferably 40% or less, more preferably 20% or less, and usually 1% or more, preferably 3% or more, more preferably 5% or more, and further preferably 10% or more. When the thickness of the first absorbent portion 21 with respect to the thickness of the second absorbent portion 22 is equal to or less than the upper limit of the above range, the excreted water is easily diffused into the absorber 20 using the first absorbent portion 21. On the other hand, when the thickness of the first absorbent portion 21 with respect to the thickness of the second absorbent portion 22 is equal to or greater than the lower limit of the above range, the excreted moisture passes through the first absorbent portion 21 and the permeated excreted moisture passes through the backsheet 63. It becomes easy to prevent transmission.

  When the density of the 1st absorption part 21 is lower than the 2nd absorption part 22, the density of the 1st absorption part 21 with respect to the density of the 2nd absorption part 22 is 80% or less normally, Preferably it is 60% or less, More preferably, it is 40. % Or less, more preferably 20% or less, and usually 1% or more, preferably 3% or more, more preferably 5% or more, and further preferably 10% or more. When the density of the first absorption part 21 with respect to the density of the second absorption part 22 is equal to or lower than the upper limit of the above range, the excretion water is easily diffused into the absorber 20 using the first absorption part 21. On the other hand, when the density of the first absorbent portion 21 with respect to the density of the second absorbent portion 22 is equal to or higher than the lower limit of the above range, the excreted moisture passes through the first absorbent portion 21 and the permeated excreted moisture passes through the backsheet 63. It becomes easy to prevent transmission.

[Formation of absorber]
The formation method of the absorber 20 which has the 1st absorption part 21 and the 2nd absorption part 22 is not specifically limited, It can manufacture by a well-known method. For example, in the case where the absorbent material including the superabsorbent polymer 51 and the fiber material 52 is deposited to produce the mat-like absorbent core 40, the absorbent material is reduced in the portion of the first absorbent portion 21 (thin and thin). It can be formed by depositing (or sparsely) and depositing more (thick and / or densely) on the portion of the second absorption portion 22. Furthermore, the absorber 20 can be obtained by covering the absorbent core 40 on which the first absorbent portion 21 and the second absorbent portion 22 are formed with the wrap sheet 61.

[I-2. Action and Effect]
Since the urine pad 100 of the present embodiment is configured as described above, the following operations and effects can be obtained.

  Conventionally, in an absorbent article in which a slit portion penetrating in the thickness direction is provided in the absorbent body, the absorption performance has been improved by diffusion of excretion moisture into the absorbent body through the slit portion. However, since the excretion moisture passes through the slit portion quickly in the thickness direction, the excretion moisture is easily transmitted from the position where the slit portion is present in the plan view in the other member on the skin non-facing surface side of the absorber. For this reason, excretion water may leak out. Therefore, there has been a demand for an absorber that can suppress the permeation of excretion moisture while accelerating the diffusion of excretion moisture, and an absorbent article including the absorber.

(1) In the urine pad 100, the absorbent body 20 includes the first absorbent portion 21 having a low content of the superabsorbent polymer 51 and the fiber material 52, and the superabsorbent polymer 51 and the fiber material 52 than the first absorbent portion 21. And the second absorption part 22 having a large content. Thereby, compared with the case where content of the superabsorbent polymer 51 and the fiber material 52 is uniform as a whole, in the absorbent body 20, the diffusion of excretion moisture from the first absorbent portion 21 into the second absorbent portion 22 is reduced. It can be accelerated and absorbed quickly. Furthermore, the 1st absorption part 21 does not penetrate the absorber 20 like the slit part which penetrates an absorber in the thickness direction. For this reason, it is possible to diffuse and absorb excretion moisture from the first absorption part 21 and retain the excretion moisture inside the absorber 20, and that the excretion moisture passes through the absorber 20 and permeates to the outside. Can be suppressed. Thus, the urine pad 100 can accelerate the diffusion and absorption of excreted water and suppress the excretion of leaked water.

(2) In the urine pad 100, the first absorbent portion 21 has a lower density of the superabsorbent polymer 51 and the fiber material 52 than the second absorbent portion 22. Since the density of the superabsorbent polymer 51 and the fiber material 52 is low, a space in which the excretion moisture can flow in the absorbent body 20 becomes relatively large. For this reason, it is possible to promote the diffusion and absorption of excreted water via the first absorption part 21. In addition, the first absorbent portion 21 contains the superabsorbent polymer 51 and the fiber material 52 while the density of the superabsorbent polymer 51 and the fiber material 52 is lower than that of the second absorbent portion 22. It does not penetrate through. Therefore, the excretion water can suppress the passage of the absorber 20, and the excretion water can be prevented from passing therethrough.

(3) In the urine pad 100, the first absorbent portion 21 has a smaller dimension in the thickness direction than the second absorbent portion 22. A difference in thickness between the first absorbent portion 21 and the second absorbent portion 22 is caused by the small dimension in the thickness direction of the first absorbent portion 21. And since excretion moisture penetrate | infiltrates from the side part of the level | step difference produced by this thickness difference, the spreading | diffusion and absorption of excretion moisture to the width direction of the absorber 20 can be promoted. Moreover, the 1st absorption part 21 contains the superabsorbent polymer 51 and the fiber material 52, although the dimension of the thickness direction is smaller than the 2nd absorption part 22, and does not penetrate the absorber 20. FIG. Therefore, the excretion water can suppress the passage of the absorber 20, and the excretion water can be prevented from passing therethrough.

[II. Second embodiment]
Next, a second embodiment of the urine pad will be described.
The urine pad of the present embodiment has the same configuration as that of the first embodiment except for the points described here. About these structures, the same code | symbol is attached | subjected and detailed description is abbreviate | omitted.

[II-1. Constitution]
As shown in FIG. 4, in the urine pad 101 of the present embodiment, the absorbent core 40 has an upper absorbent core 41 disposed on the skin facing surface side and a lower absorbent core disposed on the skin non-facing surface side. 45 and a two-layer structure. Further, the absorbent body 20 has a two-layer structure of an upper absorbent body 31 containing the upper absorbent core 41 and a lower absorbent body 35 containing the lower absorbent core 45.

  Similar to the absorbent core 40 according to the first embodiment, the lower absorbent core 45 has a substantially rectangular outer shape in plan view. The lower absorbent core 45 is covered with a wrap sheet 61b. In this way, the lower absorbent body 35 has the lower absorbent core 45 and the wrap sheet 61b. The lower absorbent body 35 has a first absorbent portion 21 and a second absorbent portion 22, similarly to the absorbent body 20.

  The upper absorbent core 41 has a substantially rectangular outer shape in a plan view, and has a shape in which the central portion in the width direction penetrates in the thickness direction along the longitudinal direction. Here, the upper absorbent core 41 having an annular shape is illustrated. Moreover, the side (width direction inner side and outer side) and the skin opposing surface side of the upper absorbent core 41 are covered with a wrap sheet 61a. In this manner, the upper absorbent body 31 has the upper absorbent core 41 and the wrap sheet 61a. In the present embodiment, the laminated sheet 60 includes wrap sheets 61a and 61b, a top sheet 62, a back sheet 63, and a cover sheet 65.

  The upper absorbent body 31 is laminated on the skin facing surface side of the lower absorbent body 35. Further, the upper absorbent body 31 has a slit portion 42 penetrating in the thickness direction at a position corresponding to the first absorbent portion 21. That is, the upper absorbent body 31 has an annular shape by including the slit portion 42 provided at the center in the width direction along the longitudinal direction of the absorbent body 20 in plan view. And the upper absorber 31 is mounted in the position corresponding to the 2nd absorption part 22 by planar view in the skin opposing surface side of the lower absorber 35. FIG. The slit part 42 has a dimension in the width direction larger than that of the first absorption part 21 in a plan view. In other words, the width of the upper absorbent body 31 is smaller than that of the second absorbent portion 22.

  Similar to the absorbent core 40 according to the first embodiment, the upper absorbent core 41 includes a superabsorbent polymer 51 and a fiber material 52. And the top sheet 62 is laminated | stacked on the skin opposing surface side of the lap | sheet 61a laminated | stacked on the upper absorbent core 41. FIG. The super absorbent polymer 51 is prevented from leaking from the top sheet 62 by the lap sheet 61 a laminated on the upper absorbent core 41.

  The lower absorbent core 45 contains at least a fiber material 52. More specifically, the lower absorbent core 45 contains the fiber material 52 in the first absorbent portion 21. The lower absorbent core 45 has a fiber material layer 47 containing the fiber material 52 in the second absorbent portion 22, and a polymer layer containing the superabsorbent polymer 51 on the skin facing surface side of the fiber material 52. 46 is further provided. The polymer layer 46 has a larger dimension in the width direction than the upper absorbent body 31 provided on the skin facing surface side of the second absorbent portion 22. The lower absorbent core 45 does not have the polymer layer 46 in the first absorbent portion 21 but has only the fiber material layer 47.

[II-2. Action and Effect]
Since the urine pad 101 of the present embodiment is configured as described above, the following functions and effects can be obtained in addition to the functions and effects described in the first embodiment.

(1) The urine pad 101 includes an upper absorbent body 31 and a lower absorbent body 35, and the upper absorbent body 31 includes a slit portion 42 penetrating in the thickness direction. Thereby, excretion water | moisture content can be absorbed by the upper absorber 31 provided in the skin opposing surface side. At this time, first, the upper absorbent body 31 can absorb excretion moisture from the skin facing surface side. Next, excreted moisture permeates into the inside of the upper absorbent body 31 from the side surface facing the slit portion 42 by allowing the excreted moisture to pass through the slit portion 42 in the same manner as the absorber provided with the conventional slit portion. By doing so, it is possible to diffuse and absorb excretion water in the width direction. Moreover, the excretion water which passed the slit part 42 in the thickness direction can be spread in the width direction between the upper absorber 31 and the lower absorber 35. And this spread excretion water can be absorbed from the skin non-opposing surface side of upper absorber 31. Further, the first absorbent portion 21 of the lower absorbent body 35 does not penetrate the absorbent body 20 like the slit portion 42. For this reason, the lower absorbent body 35 can suppress the passage of the excreted moisture by allowing the excreted moisture to pass through the absorber 20. As described above, the urine pad 101 can further enhance the diffusion and absorption performance of excreted water and suppress the leakage of excreted water.

(2) As for the urine pad 101, the slit part 42 has a larger dimension in the width direction than the first absorption part 21. Thereby, excretion moisture can quickly pass through the wide slit portion 42 in the thickness direction. Therefore, it becomes easy to spread excretion moisture that has passed through the slit portion 42 between the upper absorbent body 31 and the lower absorbent body 35. In addition, excretion water that has passed through the slit portion 42 is easily diffused into the first absorption portion 21. Furthermore, in the position which corresponds to the skin non-facing surface side of the slit part 42, the width direction inner side part which adjoins the 1st absorption part 21 among the 2nd absorption parts 22 with respect to the width direction both ends of the slit part 42 by planar view It protrudes inward in the width direction. By this protruding portion, the excretion portion that has passed through the slit portion 42 can be received and diffused into the lower absorbent body 35. Thus, the urine pad 101 can further enhance the diffusion and absorption performance of excreted water.

(3) As for the urine pad 101, the 2nd absorption part 22 further has the polymer layer 46 in the skin opposing surface side. Thereby, the amount of the superabsorbent polymer 51 and the fiber material 52 contained in the second absorbent portion 22 is relatively larger than that of the first absorbent portion 21. Therefore, similarly to the urine pad 100, the diffusion of excretion moisture from the first absorption portion 21 to the second absorption portion 22 is promoted to absorb the excretion quickly, and the excretion moisture suppresses the passage through the absorber 20. In addition, permeation of excreted water to the outside can be suppressed. In addition, excretion moisture spread between the upper absorbent body 31 and the lower absorbent body 35 on the skin facing surface side of the second absorbent portion 22 can be absorbed by the superabsorbent polymer 51 of the polymer layer 46. As described above, the urine pad 101 can further enhance the diffusion and absorption performance of excreted water.

(4) As for the urine pad 101, the polymer layer 46 has a dimension of the width direction larger than the upper absorber 31 provided in the skin opposing surface side of the 2nd absorption part 22. FIG. That is, the superabsorbent polymer 51 is provided so as to protrude inward in the width direction with respect to both ends in the width direction of the slit portion 42 in a plan view at a position corresponding to the skin non-facing surface side of the slit portion 42. The superabsorbent polymer 51 can receive and absorb excreted water that has passed through the slit portion 42. Thus, the urine pad 101 can further enhance the diffusion and absorption performance of excreted water.

[III. Others]
In the description of the second embodiment, the case where the lower absorbent core 45 includes the polymer layer 46 and the fiber material layer 47 in the second absorbent portion 22 has been described as an example. The lower absorbent core 45 may be formed by mixing the superabsorbent polymer 51 with the fiber material 52 as in the urine pad 102 shown in FIG. 5 (modified example of the second embodiment). In this case, the amount of excreted water absorbed by the lower absorbent core 45 can be increased, and as a result, the total amount of excreted water absorbed by the absorbent body 20 can be increased.

100, 101, 102 Urine pad 2 Front body 3 Crotch 4 Back body 10 Laminate 20 Absorber 21 First absorbent 22 Second absorbent 31 Upper absorbent 35 Lower absorbent 40 Absorbent core 41 Upper absorbent core 42 Slit 45 Lower absorbent core 46 Polymer layer 47 Fiber material layer 51 Superabsorbent polymer 52 Fiber material 60 Laminated sheet 61 Lap sheet 62 Top sheet 63 Back sheet 64 Side sheet 65 Cover sheet

Claims (8)

An absorbent article composed of a front body, a crotch, and a back body,
An absorbent body provided over the front body, the crotch part, and the back body and containing a superabsorbent polymer and a fiber material;
The absorbent body is provided along the longitudinal direction of the absorbent body, and has a first absorbent part with a small content of the superabsorbent polymer and the fiber material, and on the outer side in the width direction of the first absorbent part in plan view. An absorbent article, comprising: a second absorbent portion that is provided and has a higher content of the superabsorbent polymer and the fiber material than the first absorbent portion. The first absorbent part has a lower density of the superabsorbent polymer and the fiber material than the second absorbent part,
The absorbent article according to claim 1. The first absorbent part has a smaller dimension in the thickness direction than the second absorbent part,
The absorbent article according to claim 1 or 2. The absorber has an upper absorbent containing the superabsorbent polymer and the fiber material, and a lower absorbent containing the fiber material,
The lower absorbent body has the first absorbent portion and the second absorbent portion,
The upper absorbent body is placed at a position corresponding to the second absorbent portion on the skin facing surface side of the lower absorbent body,
The upper absorbent body has a slit portion penetrating in the thickness direction at a position corresponding to the first absorbent portion.
The absorptive article according to any one of claims 1 to 3. The slit part has a larger dimension in the width direction than the first absorption part,
The absorbent article according to claim 4. The second absorbent portion further has a polymer layer containing the superabsorbent polymer on the skin facing surface side,
The absorbent article according to claim 4 or 5. The polymer layer has a larger dimension in the width direction than the upper absorbent body provided on the skin-opposing surface side of the second absorbent portion.
The absorbent article according to claim 6. The first absorber is provided at the center in the width direction of the absorber in plan view.
The absorptive article according to any one of claims 1 to 7.

Images