JP2019176930A - Absorbent article - Google Patents

Abstract

To provide an absorbent article that can suppress permeation of excreted water content from a back sheet.SOLUTION: An absorbent article 100 includes: a slit part 49 provided on a side of a skin facing surface of an absorbent core 40; a sheet extending on a side of a skin non-facing surface relative to the slit part 49 and including a back sheet 63; and a sheet overlapping part 83 formed by causing the back sheet 63 to partially overlap on the side of the skin non-facing surface relative to the slit part 49.SELECTED DRAWING: Figure 7

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, and a back sheet disposed on the skin non-facing surface side of the absorber. According to the absorbent article, liquid moisture such as urine and menstrual blood excreted from the wearer (hereinafter referred to as “excreted moisture”) and excrement such as solid components are retained inside and leaked 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 extending along the longitudinal direction. According to the absorbent article of Patent Document 1, excretion moisture can be diffused through a slit 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 this case is to provide an absorbent article capable of suppressing leakage of excreted water. 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 here includes a slit part provided on the skin facing surface side of the absorbent core, a sheet including a back sheet extending to the skin non-facing surface side with respect to the slit part, and the slit part The sheet non-facing surface side is provided with a sheet overlapping portion formed by partially overlapping the back sheet.

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

It is an expanded view of the urine leak pad which concerns on one Embodiment. It is a disassembled perspective view of the urine leak pad which concerns on one Embodiment. It is a schematic diagram which shows the principal part cross section of a urine leak pad provided with the 1st bonding part in the III-III arrow view of FIG. It is a schematic diagram which shows the principal part cross section of a urine leak pad provided with a 2nd bonding part. It is a schematic diagram which shows the principal part cross section of a urine leak pad provided with a 1st non-air-permeable member. It is a schematic diagram which shows the principal part cross section of a urine leak pad provided with a 2nd non-air-permeable member. It is a schematic diagram which shows the principal part cross section of a urine leak pad provided with a 1st sheet | seat duplication part. It is a schematic diagram which shows the manufacturing process of a 1st sheet duplication part. It is a schematic diagram which shows the principal part cross section of a urine leak pad provided with a 2nd sheet | seat duplication part. It is a schematic diagram which shows the principal part cross section of the 1st modification of a urine leak pad. It is a schematic diagram which shows the principal part cross section of the 2nd modification of a urine leak pad.

  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. Further, it 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.

[1. Constitution]
[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”.

  As shown in FIG. 1, the urine pad 100 is configured 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. Further, the urine pad 100 includes an absorbent core 40 having a built-in absorbent core 40 and having a groove-like portion 23 and an outer peripheral portion 24. 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. Further, a side sheet 64 is arranged on the side (outside in the width direction) of the top sheet 62 and on the skin facing 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. The absorbent core 40 has a slit portion 49 that extends along the longitudinal direction and penetrates in the thickness direction. That is, the absorptive core 40 has a quadrangular annular shape by extending along the longitudinal direction of the absorbent body 20 in plan view and having the slit portion 49 provided at the center in the width direction. .

  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. The content of the superabsorbent polymer 51 and the fiber material 52 is not particularly limited, but 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 includes a groove-like portion 23 provided along the longitudinal direction of the absorbent body 20 in a plan view and an outer peripheral portion 24 provided outside the groove-like portion 23 in a plan view. And have.

  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 groove-like portion 23 is formed by the wrap sheet 61 being recessed in the thickness direction from the outer peripheral portion 24 in accordance with the shape of the slit portion 49. Moreover, as shown in FIG.1 and FIG.3, the groove-shaped part 23 is formed in the width direction center along the longitudinal direction in the skin opposing surface side of the absorber 20. As shown in FIG.

<Lap sheet>
The wrap sheet 61 is a sheet-like member that covers the absorbent core 40. The entire core of the absorbent core 40 is encapsulated by the wrap sheet 61 including the skin facing surface side and the skin non-facing surface side of the absorbent core 40, so that the formability 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. As shown in FIG. 3, the laminate 10 is recessed in the thickness direction in accordance with the shape of the groove-like portion 23 on the skin facing surface side.

<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 at least partially or entirely made of a material having high water permeability. 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 material having low water permeability. 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 across the width direction side on the skin facing surface side of the laminate 10. 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 material with low water permeability 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.

  The cover sheet is made of a gas-permeable material, and can be made of a material such as a woven fabric or a non-woven fabric, for example. 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, as a cover sheet 65, a spunbonded nonwoven fabric can be suitably used from the viewpoint of securing a feeling of touch (hand) and excellent flexibility.

  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 thread rubber 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 64 </ b> B positioned at the end edge 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 64B.

[1-2. Detailed configuration]
Next, a detailed configuration of the urine pad 100 will be described.
In the urine pad 100, the groove portion 23 is formed by the slit portion 49, whereby the diffusion of excretion moisture along the groove portion 23 and the penetration of excretion moisture toward the non-skin facing side are promoted and absorbed. The performance is improved. However, for example, when the wearer excretes a large amount of urine at a time, it takes time for the absorbent body 20 to completely absorb urine, so that excreted water that cannot be immediately absorbed by the absorbent body 20 is absorbed by the backsheet. 63 and the cover sheet 65 may leak out to the outside. In addition, when the wearer is in a sitting position or the like, excretion moisture held in the absorbent body 20 may pass through the back sheet 63 and the cover sheet 65 due to gravity and leak to the outside. In particular, at a position corresponding to the slit portion 49 in a plan view, excretion moisture tends to leak out.

  Therefore, in order to suppress such leakage of excretion moisture to the non-skin facing surface side, the urine pad 100 is provided with a leak blocking portion 80 on the non-skin facing surface side with respect to the slit portion 49. From the viewpoint of preventing the leakage of excretion moisture to the skin non-facing surface side, diffusing excretion moisture in the width direction, and efficiently absorbing excretion moisture in the absorber 20, It is preferable that it is larger than the dimension of the slit part 49 in the width direction. From the same viewpoint, it is preferable that the longitudinal dimension of the sealing part 80 is larger than the longitudinal dimension of the slit part 49.

  In the following, three types of the sealing part 80 are illustrated. Specifically, the bonding part 81 is illustrated as the first sealing part 80, the non-air-permeable member 82 is illustrated as the second sealing part 80, and the sheet overlapping part 83 is illustrated as the third sealing part 80. That is, the sealing part 80 has at least one of the bonding part 81, the non-air-permeable member 82, and the sheet | seat duplication part 83. FIG.

[Pasting part]
As shown in FIG.3 and FIG.4, in the bonding part 81, the sheet | seat in the skin non-facing surface side of the absorptive core 40 is bonded together. Such a sheet is not particularly limited as long as it extends to the skin non-facing surface side with respect to the slit portion 49, and examples thereof include a wrap sheet 61, a back sheet 63, a cover sheet 65, and the like. Further, the object to which the sheet is bonded is not particularly limited as long as it is a component located on the skin facing surface side, and examples thereof include the absorbent core 40, the wrap sheet 61, the back sheet 63, and the like.

  As such a bonding part 81, in FIG. 3, the first bonding part 81 </ b> A in which the edges of the wrap sheet 61 covering the absorbent core 40 are bonded to each other on the skin non-facing surface side with respect to the slit part 49. Indicates. Further, in FIG. 4, on the skin non-opposing surface side with respect to the slit portion 49, the back sheet 63 that covers the absorber 20 from the skin non-opposing surface side is bonded to the wrap sheet 61 positioned on the skin facing surface side. Two pasting parts 81B are shown.

In the bonding part 81, a sheet | seat is bonded together by the contact bonding layer, for example. For the adhesive layer, it is preferable to use an on-demand adhesive capable of adjusting the timing of exhibiting the adhesive performance.
As the on-demand type adhesive, a hot melt adhesive, a UV (UltraViolet) curable adhesive, or the like is used. The hot-melt adhesive is cured after heat is applied and melted. Further, the UV curable adhesive is cured by being irradiated with ultraviolet rays. In other words, the hot melt adhesive does not exhibit adhesive performance until heat is applied. Similarly, the UV curable adhesive does not exhibit adhesive performance until it is irradiated with ultraviolet rays.

  A hot melt adhesive is preferably used for the adhesive layer from the viewpoint that it does not require special equipment such as UV irradiation and is excellent in workability and safety.

  The thickness of the adhesive layer is preferably thinner from the viewpoint of reducing the uncomfortable feeling when the urine pad 100 is worn. On the other hand, a certain amount of thickness is required from the viewpoint of suppressing excretion of permeated water and securely bonding the sheets. Therefore, the thickness dimension of the adhesive layer is, for example, 5 to 500 μm, preferably 20 to 100 μm.

  Further, the adhesive layer may be provided in the entire region overlapping the slit portion 49 in a plan view, or may be provided partially with respect to the slit portion 49. The adhesive layer can be formed in various patterns in plan view. Examples of such a pattern include a stripe shape substantially parallel to the width direction, a stripe shape substantially parallel to the longitudinal direction, a dot shape, a staggered shape, a wavy shape, and a lattice shape. According to the adhesive layer of the said pattern, excretion water can be spread | diffused in the width direction (between the absorber 20 and the back sheet 63), suppressing the permeation | transmission to the skin non-opposing surface side of excretion water.

  In addition, 81 A of 1st bonding parts and 81 B of 2nd bonding parts can also be used together. When the first bonding portion 81A and the second bonding portion 81B are used in combination, the thickness dimension of the adhesive layer, the region where the adhesive layer is provided in plan view, and the pattern shape of the adhesive layer in plan view are the same. It may be different or different.

(Non-permeable member)
As shown in FIGS. 5 and 6, the non-air permeable member 82 is disposed on the skin non-facing surface side with respect to the slit portion 49. The non-air-permeable member 82 is a member that does not allow gas or liquid to pass therethrough. The position where the non-air-permeable member 82 is disposed is not particularly limited as long as it is on the non-skin facing surface side with respect to the slit portion 49. The non-air-permeable member 82 can be disposed, for example, between the wrap sheet 61 and the back sheet 63, between the back sheet 63 and the cover sheet 65, and the like.
5 and 6, the urine pad 100 is a region overlapping the absorbent core 40 in plan view, and the edges of the wrap sheet 61 are bonded to each other on the skin facing surface side of the absorbent core 40. Yes.

  As such a non-air-permeable member 82, FIG. 5 shows a first non-air-permeable member 82A arranged on the skin facing surface side of the back sheet 63 that covers the absorber 20 from the skin non-facing surface side. FIG. 6 shows a second non-air-permeable member 82 </ b> B disposed on the skin non-facing surface side of the back sheet 63.

  Examples of the non-air-permeable member 82 include non-air-permeable films made of plastic films such as polyolefin films and polyester films, and metal foils such as aluminum foil. Among these, a non-air permeable film is preferable from the viewpoint that it is easily available and inexpensive, and is excellent in workability. Examples of the material constituting the polyolefin film include polyethylene resin and polypropylene resin. Moreover, as a material which comprises a polyester film, a polyethylene terephthalate resin etc. are mentioned.

  The non-air-permeable member 82 is preferably thin from the viewpoint of reducing a sense of discomfort for the wearer. On the other hand, a certain amount of thickness is required from the viewpoint of maintaining the durability of the non-air-permeable member 82 while suppressing the permeation of excreted moisture. Therefore, the thickness dimension of the non-air-permeable member 82 is, for example, 5 to 500 μm, preferably 20 to 100 μm.

  The non-air permeable member 82 may be disposed over the entire area overlapping with the slit portion 49 or may be partially disposed with respect to the slit portion 49.

  Further, the non-air permeable member 82 is preferably extended in the longitudinal direction of the absorbent core 40. Such a non-air-permeable member 82 functions as a center line of the urine pad 100 and can be used as a marker in the manufacturing process. By detecting the position of the center line by the marker identifying means, it is possible to determine whether or not the absorber 20 is laminated at an appropriate position with respect to the center line. Therefore, the position shift of the absorber 20 laminated | stacked in the manufacturing process of the urine pad 100 can be prevented, and the productivity of the urine pad 100 can be improved. In addition, since the air-impermeable member 82 can be viewed when the urine pad 100 is viewed in plan from the skin facing surface side, alignment when the urine pad 100 is worn on the wearer is facilitated.

  The first non-permeable member 82A and the second non-permeable member 82B can be used in combination. When the first non-permeable member 82A and the second non-permeable member 82B are used in combination, these members 82A and 82B may be made of the same material or different materials. Further, the first non-permeable member 82A and the second non-permeable member 82B may have the same thickness dimension or may be different. Furthermore, the area | region which arrange | positions 82 A of 1st non-permeable members and the 2nd non-permeable member 82B may be the same or different in planar view.

[Sheet overlapping part]
As shown in FIGS. 7 to 9, the sheet overlap portion 83 is provided on the skin non-facing surface side with respect to the slit portion 49. The sheet overlap part 83 is a part where the back sheet 63 is partially overlapped.

  As such a sheet overlap portion 83, FIG. 7 shows a first sheet overlap portion 83A in which the cross section in the width direction of the back sheet 63 is folded back into a “Z” shape. FIG. 9 shows a second sheet overlapping portion 83B in which two back sheets 63A and 63B are partially overlapped.

For example, as illustrated in FIG. 8, the first sheet overlapping portion 83 </ b> A includes a single sheet of the back sheet 63, with a first fold line P ₁ and a second fold line P ₂ extending in the longitudinal direction. It is formed by bending it into a “Z” shape. Note that the second bending line P ₂ extends longitudinally spaced a predetermined distance from the first fold line P ₁ in the width direction. In other words, the first fold line P ₁ spaced a predetermined dimension in the width direction distance between the second fold line P ₂ is the widthwise dimension of the first sheet overlapping portion 83A.
In addition to the above, the first sheet overlapping portion 83A can be exemplified by a folded back sheet 63 in two.

  The second sheet overlapping portion 83B is formed by overlapping the end portions in the width direction of the two back sheets 63A and 63B by a predetermined dimension in the width direction on the inner side in the width direction of the urine pad 100. That is, the overlapping dimension in the width direction of the two back sheets 63A and 63B is the width dimension of the second sheet overlapping part 83B. Further, the two back sheets 63A and 63B may be bonded together by an adhesive layer at overlapping portions. In this case, as the adhesive layer, the adhesive layer described in the above bonding part can be used.

  The first sheet overlap portion 83A and the second sheet overlap portion 83B can be used in combination. In this case, two or more back sheets are required.

[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.

  (1) The urine pad 100 includes a sealing portion 80 for suppressing leakage of excretion moisture from the slit portion 49 to the skin non-facing surface side on the skin non-facing surface side with respect to the slit portion 49. Since the excretion moisture is diffused in the width direction while suppressing leakage of excretion moisture to the skin non-opposing surface side by the leaking part 80, the excretion moisture can be efficiently absorbed by the absorbent body 20.

(2) By making the sealing part 80 into the bonding part 81 which bonded the sheet | seat which comprises the urine pad 100, the urine pad 100 provided with the sealing part 80 can be manufactured easily.
Specifically, the first bonding portion 81A can be formed by simply bonding the edges of the wrap sheet 61 with an adhesive layer in the step of covering the absorbent core 40 with the wrap sheet 61. Moreover, the 2nd bonding part 81B can be formed only by bonding the back sheet 63 on the skin opposing surface side in the skin non-opposing surface side with respect to the slit part 49 with an adhesive layer. Therefore, the urine pad 100 including the bonding portion 81 can be easily manufactured without adding a special manufacturing apparatus to the conventional urine pad 100 manufacturing apparatus. In addition, the material cost of the adhesive layer is low, and the manufacturing cost of the urine pad 100 including the sealing portion 80 can be reduced without adding another sheet. Furthermore, the adhesive layer has a function of suppressing excretion moisture that permeates the back sheet 63 by appropriately selecting the thickness dimension, the region in which the adhesive layer is provided in plan view, and the pattern shape in plan view, and the excretion moisture in the width direction. It is easy to balance with the function of diffusing into

  (3) A urine pad provided with the sealing portion 80 only by disposing the non-permeable film as the non-permeable member 82 of the sealing portion 80 on the skin facing surface side and / or the skin non-facing surface side of the back sheet 63. 100 can be easily manufactured. Such a non-air permeable film can be comprised with a resin material. Therefore, the width of the material design is wide, and the thickness dimension and shape can be easily adjusted. Therefore, permeation of excretion water can be suppressed by the non-air-permeable film as the non-air-permeable member 82, and furthermore, excretion water can be diffused in the surface direction (particularly in the width direction). The urine pad having a function of diffusing excretion moisture in the width direction while suppressing the leakage of excretion moisture from the urine pad 100 by using the non-permeable film as the non-permeability member 82 as the leakage preventing portion 80. 100 can be easily obtained.

  (4) Further, by disposing the non-permeable film as the non-permeable member 82 so as to extend in the longitudinal direction of the absorbent core 40, the non-permeable film functions as a center line of the urine pad 100, A non-air permeable film can be used as a marker in the production process. Therefore, when the absorbent body 20 is stacked in the manufacturing process of the urine pad 100, positional displacement can be prevented and the productivity of the urine pad 100 can be improved. Moreover, since the non-permeable film as the non-permeable member 82 can be visually recognized when the urine pad 100 is viewed in plan from the skin facing surface side, alignment when the urine pad 100 is attached to the wearer. Becomes easier.

(5) By making the sealing part 80 the sheet overlapping part 83 in which the back sheet 63 is partially overlapped, the urine pad 100 including the sealing part 80 can be simply added without adding a member made of different materials. Can be manufactured.
Specifically, the first sheet overlapping portion 83 </ b> A can be formed simply by bending the cross section in the width direction of the back sheet 63 into a “Z” shape. Further, the second sheet overlapping portion 83B can be formed only by partially overlapping the two back sheets 63A and 63B. Therefore, a roll-shaped object obtained by winding the back sheet 63 whose widthwise cross section is bent in a “Z” shape, or a roll-shaped object obtained by winding two partially overlapping back sheets 63A and 63B are prepared. For example, the urine pad 100 including the leakage blocking portion 80 can be easily manufactured using a conventional manufacturing apparatus.

[3. Others]
In the above embodiment, the urine pad 100 including the square-shaped absorbent core 40 having the slit portions 49 penetrating in the thickness direction has been described as an example, but the shape of the absorbent core 40 is not particularly limited. That is, the slit part 49 does not need to penetrate the absorbent core 40 in the thickness direction as long as it has a function of promoting the permeation of excretion moisture toward the skin non-facing surface side. For example, the content of the absorbent material made of the superabsorbent polymer 51 and the fiber material 52 at a position corresponding to the slit portion 49 is smaller than the content of the absorbent material in the absorbent core 40 located in the outer peripheral portion 24. A low absorbent core 40a may be provided. Moreover, if the content of the absorbent material in the low absorbent core 40a is smaller than the content of the absorbent material in the absorbent core 40, the thickness dimension of the low absorbent core 40a is not particularly limited. For example, as shown in FIG. 10, the thickness dimension of the low absorbent core 40 a may be smaller than the thickness dimension of the absorbent core 40. Further, the thickness dimension of the low-absorbent core 40a may be substantially the same as the thickness dimension of the absorbent core 40.
In addition, when the thickness dimension of the absorbent core 40 and the thickness dimension of the low absorbent core 40a are substantially the same, even if this is covered with the wrap sheet 61, the groove-like part 23 is discriminated from the appearance of the absorbent body 20. It may be difficult. Even in such a case, the absorbent body 20 includes the groove-like portion 23 or the slit portion 49 in the portion where the low-absorbent core 40a is located in a plan view.

  The manufacturing method of the absorbent body 20 including the absorbent core 40 and the low absorbent core 40a as described above is not particularly limited, and can be manufactured by a known method. For example, when depositing the absorbent material, the absorbent material is deposited in a large amount (thick and / or densely) on the portion of the absorbent core 40, and less (thin and / or sparsely) on the portion of the low-absorbent core 40a. The absorber 20 can be obtained by depositing and covering these with the wrap sheet 61.

  Moreover, as the sealing part 80, 2 or more of the bonding part 81, the non-air-permeable member 82, and the sheet | seat duplication part 83 can also be combined. For example, FIG. 11 shows a urine pad 100 in which a first bonding portion 81A and a non-permeable film as the first non-permeable member 82A are used in combination. By using the first bonding portion 81A and the non-permeable film as the first non-permeable member 82A together, excretion moisture leaks through the back sheet 63 at a position corresponding to the slit portion 49 in plan view. It can be surely prevented from taking out.

DESCRIPTION OF SYMBOLS 100 Urine pad 2 Front body 3 Crotch part 4 Back body 10 Laminated body 20 Absorbent body 23 Groove-shaped part 24 Outer peripheral part 25 Central part 40 Absorbent core 49 Slit part 51 Superabsorbent polymer 52 Fiber material 60 Laminated sheet 61 Laminated sheet 61 Top sheet 63 Back sheet 64 Side sheet 65 Cover sheet 80 Sealing part 81 Laminating part 82 Non-air-permeable member 83 Sheet overlapping part

Claims (3)

A slit provided on the skin facing surface side of the absorbent core;
A sheet including a back sheet extending to the skin non-facing surface side with respect to the slit part,
On the skin non-facing surface side with respect to the slit portion, a sheet overlap portion formed by partially overlapping the back sheet, and
An absorbent article comprising: The absorptive article according to claim 1 in which said sheet overlap part has the 1st sheet overlap part which turned up said back sheet. The sheet includes two back sheets,
The absorbent article according to claim 1 or 2, wherein the sheet overlapping portion has a second sheet overlapping portion in which the two back sheets are partially overlapped.

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