CN111374837A

CN111374837A - Absorbent article

Info

Publication number: CN111374837A
Application number: CN201811634628.1A
Authority: CN
Inventors: 川上祐介; 佐山宁
Original assignee: Unicharm Corp
Current assignee: Unicharm Corp
Priority date: 2018-12-29
Filing date: 2018-12-29
Publication date: 2020-07-07
Also published as: JP7154203B2; JP2020108748A

Abstract

The invention provides an absorbent article with high continuity of function of a coated functional agent. The invention provides an absorbent article, which comprises a front sheet (12), a back sheet (13) and an absorbent body (14) arranged between the front sheet (12) and the back sheet (13), and has a length direction (L), a width direction (W) and a thickness direction (T) which are mutually orthogonal, wherein the absorbent body (14) at least comprises an absorbent core layer, the absorbent core layer comprises 90 mass% or more of high water-absorbent polymer relative to the total amount of absorbent materials, and a member positioned between the absorbent core layer and the back sheet (13) is coated with a functional agent containing a volatile or water-soluble functional component.

Description

Absorbent article

Technical Field

The present invention relates to an absorbent article.

Background

An absorbent article coated with a functional agent is known.

For example, patent document 1 discloses an absorbent article including a front sheet, a back sheet, an absorbent body disposed between the front sheet and the back sheet, and a second sheet disposed between the front sheet and the absorbent body, wherein a member located closer to the skin of the wearer than the absorbent body contains a perfume.

Documents of the prior art

Patent document

Patent document 1: japanese patent laid-open publication No. 2018-102616

Disclosure of Invention

Problems to be solved by the invention

However, in the absorbent article described in patent document 1, since the functional agent is contained in a member located closer to the skin of the wearer than the absorbent body, such as the topsheet and the second sheet, the fragrance as the functional agent is easily volatilized and easily washed away by a liquid such as urine, and thus the function of the functional agent is not maintained.

The present invention has been made in view of the above problems, and an object thereof is to provide an absorbent article having a high persistence of the function of a functional agent applied thereto.

Means for solving the problems

In order to solve the above problems, the present inventors have provided an absorbent article comprising a front sheet, a back sheet, and an absorbent body disposed between the front sheet and the back sheet, and having a longitudinal direction, a width direction, and a thickness direction that are orthogonal to each other, wherein the absorbent body comprises at least an absorbent core layer, the absorbent core layer contains a superabsorbent polymer in an amount of 90 mass% or more relative to the total amount of absorbent material, and a functional agent containing a volatile or water-soluble functional component is applied to a member located between the absorbent core layer and the back sheet.

ADVANTAGEOUS EFFECTS OF INVENTION

The functional agent of the absorbent article of the present invention has high persistence of function.

Drawings

Fig. 1 is a plan view showing a configuration example of a pants-type diaper according to an embodiment.

Fig. 2 is a sectional view taken along line II-II of fig. 1.

Fig. 3 is a plan view of the intermediate layer of the absorber included in the pants-type diaper according to the present embodiment, as viewed from the non-skin side.

Description of the reference numerals

1: pants-type diaper

10: absorbent body

14: absorbent body

43: intermediate layer

44: no. 1 base material

45: no. 1 Water absorbent Material

46: no. 2 base material

47: no. 2 Water-absorbing Material

49: functional agent

50: urine indicator

Detailed Description

< technical means of the present invention >

The present invention relates to the following technical means.

[ solution 1 ]

(Structure)

An absorbent article comprising a front sheet, a back sheet, and an absorbent body disposed between the front sheet and the back sheet, and having a longitudinal direction, a width direction, and a thickness direction that are orthogonal to each other,

the absorbent body is provided with at least an absorbent core layer,

the absorbent core layer contains 90 mass% or more of a super absorbent polymer with respect to the total amount of the absorbent material,

a member located between the absorbent core layer and the back sheet is coated with a functional agent containing a volatile or water-soluble functional ingredient.

(Effect)

The absorbent body of the absorbent article according to claim 1 of the present invention includes at least an absorbent core layer, and a functional agent containing a volatile or water-soluble functional component is applied to a member located between the absorbent core layer and the back sheet, and therefore, the presence of the absorbent core layer before absorption of body fluid makes it more difficult for the functional agent to come into contact with the outside air, and therefore, volatilization or diffusion of the functional agent can be prevented.

Further, since the content of the super absorbent polymer in the absorbent core layer is high, the functional agent is likely to volatilize or dissolve at the temperature of the body fluid when absorbing the body fluid, but the absorbent core layer swells by absorbing water, the amount of the functional agent released to the outside of the absorbent article is suppressed by the absorbent core layer, and the function of the functional agent is likely to be continued.

[ solution 2 ]

(Structure)

The absorbent article according to claim 1, wherein,

the absorbent body has a fabric layer as the member located between the absorbent core layer and the back sheet,

the functional agent is coated on the fabric layer.

(Effect)

According to claim 2 of the present invention, since the functional agent is applied to the fabric layer, when physical pressure or the like is applied, the functional agent is less likely to move from the fabric layer having a high density to the absorbent core layer having a low density, and therefore the durability of the function of the functional agent is further improved.

[ solution 3 ]

(Structure)

The absorbent article according to claim 2, wherein,

the absorbent body further comprises an additional absorbent core layer on the non-skin side of the absorbent core layer,

the fabric layer is disposed between the absorbent core layer and the additional absorbent core layer.

(Effect)

According to claim 3 of the present invention, since the fabric layer coated with the functional agent is sandwiched between the absorbent core layer and the additional absorbent core layer located on the non-skin side of the absorbent core layer, and the functional agent is disposed at a position sandwiched between the absorbent core layer and the additional absorbent core layer, the functional agent is sandwiched from both the upper and lower sides of the functional agent when absorbing body fluid, and the functional agent is less likely to move to the non-skin side and the skin side of the absorbent body, and therefore the continuity of the function of the functional agent is further improved.

[ solution 4 ]

(Structure)

The absorbent article according to claim 2 or 3, wherein,

the fabric layer is a hot air non-woven fabric.

(Effect)

According to the invention of claim 4, by using the bulky hot-air nonwoven fabric as the fabric layer, the fabric layer can hold the functional agent more easily, and the functional agent can be easily diffused into the fabric layer when absorbing body fluid, so that the functional agent can be maintained in a sustained state, and the functional agent can be easily developed when absorbing body fluid.

[ solution 5 ]

(Structure)

The absorbent article according to any one of claims 2 to 4, wherein,

a super absorbent polymer is present inside the fabric layer,

the position of application of the functional agent in the thickness direction of the fabric layer is a non-skin-side surface of the fabric layer.

(Effect)

According to the aspect 5 of the present invention, since the superabsorbent polymer is present inside the fabric layer and the functional agent is applied to the non-skin side of the fabric layer, the fabric layer controls the amount of release of the functional agent to the outside of the absorbent article in addition to the absorbent core layer when absorbing body fluid, and the durability of the function of the functional agent is further improved.

[ solution 6 ]

(Structure)

The absorbent article according to any one of claims 2 to 5, wherein,

the functional agent comprises an oily base agent,

the adhesive strength between the absorbent core layer and the fabric layer in wet condition is larger than 0cN/10mm and is less than 0.025cN/10 mm.

(Effect)

When the functional agent containing the oily base is diffused into the fabric layer, the oily base acts on the adhesive, and the adhesive strength between the absorbent core layer and the fabric layer may be reduced. According to claim 6 of the present invention, since the adhesive strength between the absorbent core layer and the fabric layer is low in the wet state, the fabric layer is peeled off from the absorbent core layer, the distance between the surface sheet and the functional agent becomes long, the functional agent hardly reaches the surface sheet, and the continuity of the function of the functional agent is further improved.

[ solution 7 ]

(Structure)

The absorbent article according to any one of claims 1 to 6, wherein,

the superabsorbent polymer in the absorbent core layer has a basis weight of at least 40g/m²。

(Effect)

According to claim 7 of the present invention, the superabsorbent polymer in the absorbent core layer has a weight per unit area of at least 40g/m²And thus the absorbent core layer is filled with the super absorbent polymer over the entire area, the absorbent core layer is apt to block the functional agent from the external air and body fluid. This further improves the persistence of the function of the functional agent.

[ claim 8 ] A

(Structure)

The absorbent article according to claim 1, wherein,

the functional agent is applied to a position of the member located between the absorbent core layer and the back sheet, which overlaps in the thickness direction with an excretion portion contact region that contacts an excretion portion.

(Effect)

According to the 8 th aspect of the present invention, since the functional agent is coated at the position overlapping the excretory opening contact region in the thickness direction, the functional agent is easily brought into contact with the body fluid, the continuity of the function of the functional agent can be ensured, and the function is more easily exhibited when the body fluid is absorbed.

[ solution 9 ]

(Structure)

The absorbent article according to claim 8, wherein,

the functional agent comprises an oily base agent,

the back sheet is provided with a urine indicator at a position on the skin-side surface thereof that overlaps the longitudinal center line in the thickness direction.

(Effect)

Absorbent articles sometimes include a urine indicator for detecting the excretion of urine.

According to the invention of claim 9, since the functional agent containing the oil-based base agent is applied to the member located between the absorbent body and the back sheet at a position overlapping the longitudinal centerline in the thickness direction and extending in the longitudinal direction, the oil-based base agent acts on the vicinity of the longitudinal centerline of the back sheet, and the back sheet is easily made transparent.

Therefore, the urine indicator portion extending in the longitudinal direction is provided at a position on the skin-side surface of the back sheet that overlaps the longitudinal center line in the thickness direction, and the color reaction of the urine indicator portion can be easily visually confirmed through the back sheet.

Underpants type disposable diaper

Hereinafter, a pants-type disposable diaper according to the embodiment (hereinafter, also simply referred to as "pants-type diaper") will be described. The type of the pants-type diaper is not limited to this example, and other types of pants-type diapers may be used without departing from the scope of the present invention. Examples of such other types of pants-type diapers include 3-piece diapers. The absorbent article of the present invention is not limited to the pants-type diaper 1, and may be a tape-fixed disposable diaper, a urine absorption pad used in combination with another absorbent article, a light incontinence pad, a sanitary napkin, a panty liner, or the like.

Fig. 1 and 2 are views showing a configuration example of a pants-type diaper 1 according to an embodiment. Fig. 1 is a plan view showing a state in which a pants-type diaper 1 is unfolded, and fig. 2 is a sectional view taken along line II-II of fig. 1. In fig. 2, the pants-type diaper 1 according to the present embodiment is shown in an enlarged size in the thickness direction T so as to be easily understood. The pants-type diaper 1 has a longitudinal direction L, a width direction W, and a thickness direction T which are orthogonal to each other in the state shown in fig. 1, and has a longitudinal direction center line CL which passes through the center of the width direction W and extends in the longitudinal direction L, and a width direction center line CW which passes through the center of the length direction L and extends in the width direction W. The direction and the side close to the longitudinal center line CL are set as the inward direction and the inward side in the width direction W, respectively, and the direction and the side away from the longitudinal center line CL are set as the outward direction and the outward side in the width direction W, respectively. The direction and the side closer to the width direction center line CW are set as the inward direction and the inward side in the longitudinal direction L, respectively, and the direction and the side farther from the width direction center line CW are set as the outward direction and the outward side in the longitudinal direction L, respectively. Further, a side in the longitudinal direction L that faces an end edge of the pants-type diaper 1 corresponding to the abdomen of the wearer (an end edge on the abdomen side) is referred to as a front side in the longitudinal direction L, and a side that faces an end edge of the pants-type diaper 1 corresponding to the back of the wearer (an end edge on the back side) is referred to as a rear side in the longitudinal direction L. The "plan view" refers to the pants-type diaper 1 in a state where a plane including the longitudinal direction L and the width direction W is developed as viewed from above in the thickness direction T, and the "plan view" refers to a shape grasped in the plan view. The "planar direction" is an arbitrary direction parallel to a plane including the width direction W and the length direction L. The "skin side" and the "non-skin side" refer to a side that is relatively close to the skin surface of the wearer and a side that is relatively far from the skin surface of the wearer in the thickness direction T when the pants-type diaper 1 is worn on the wearer, and the skin-side surface of each member of the pants-type diaper 1 is referred to as a "skin-side surface" and the non-skin-side surface is referred to as a "non-skin-side surface", respectively. These definitions apply not only to the pants-type diaper 1 but also to the absorbent body 14 of the pants-type diaper 1 and the respective materials disposed thereon.

The member, structure, shape, and the like extend along the longitudinal direction L, and include not only a case where the member and the like are parallel to the longitudinal direction L, but also a case where the component Dx in the longitudinal direction L of the member and the like is larger than the component Dy in the width direction W of the member and the like (Dx > Dy). Similarly, the member or the like extends in the width direction W, and includes not only a case where the member or the like is parallel to the width direction W but also a case where the component Dy in the width direction W of the member or the like is larger than the component Dx in the longitudinal direction L of the member or the like (Dy > Dx). For a curved or curved member, the member is evaluated as described above with respect to the tangent line at each point on the curve or the like.

As shown in fig. 1, the pants-type diaper 1 includes a front side portion (front side waistband) 2, a back side portion (back side waistband) 3, and an absorbent main body 10 positioned between the front side portion 2 and the back side portion 3 in a longitudinal direction L. In the present embodiment, the pants-type diaper 1 further includes a crotch portion 4 located between the abdomen-side portion 2 and the back-side portion 3. The abdominal portion 2 is a portion that abuts against the abdomen of the wearer. The back portion 3 is a portion that abuts against the hip or the back of the wearer. The absorbent body 10 is a portion that contacts the crotch of the wearer, and has one end portion in the longitudinal direction L stacked on the stomach-side portion 2 and the other end portion stacked on the back-side portion 3. The crotch portion 4 is a portion that supports the absorbent main body 10 from the non-skin side. The pants-type diaper 1 is formed by overlapping both

end portions

2a, 2a in the width direction W of the front side portion 2 and both

end portions

3a, 3a in the width direction W of the back side portion 3 in the thickness direction T, respectively, and joining them along the longitudinal direction L. In this case, in the pants-type diaper 1, the waist opening through which the waist of the wearer passes is defined by the outer end 2e of the stomach-side portion 2 in the longitudinal direction L and the outer end 3e of the back-side portion 3 in the longitudinal direction L. In the pants-type diaper 1, a pair of leg openings through which the legs of the wearer pass are defined by the

side portions

5e, 5e on both sides in the width direction W of the crotch portion 4. The abdomen-side portion (abdomen-side waistband) 2 and the back-side portion (back-side waistband) 3 can be said to be defined by the range of the longitudinal direction L in which the both

end portions

2a, 2a and the both

end portions

3a, 3a are joined.

In the present embodiment, in the state shown in fig. 1, each of the ventral portion 2 and the dorsal portion 3 has a rectangular shape that is expanded substantially in the width direction W and is separated from each other in the longitudinal direction L. The crotch portion 4 is located between the stomach portion 2 and the back portion 3, and both side edges in the width direction W are recessed inward in the width direction W. The stomach-side portion 2, the crotch portion 4, and the back-side portion 3 are integrally formed with each other. In another embodiment, the stomach-side portion, the crotch portion, and the back-side portion are formed independently of each other. In another embodiment, the pants-type diaper includes a front portion and a back portion, and does not include a crotch portion.

In the present embodiment, the stomach portion 2, the back portion 3, and the crotch portion 4 are provided with liquid-impermeable cover sheets (sheet members) 5. The cover sheet 5 includes a cover sheet 5a on the skin side and a cover sheet 5b on the non-skin side. The cover sheet 5a and the cover sheet 5b are laminated in the thickness direction T and bonded to each other with an adhesive or the like. Both ends in the longitudinal direction L of the covering sheet 5b are folded back toward the skin side so as to cover both ends in the longitudinal direction L of the covering sheet 5 a. In this case, the portion of the covering sheet 5b at the folded-back position of the abdomen portion 2 constitutes the end 2e of the abdomen portion 2, and the portion of the covering sheet 5b at the folded-back position of the back portion 3 constitutes the end 3e of the back portion 3.

Examples of the cover sheet 5 include any liquid impermeable sheet such as a liquid impermeable nonwoven fabric, a synthetic resin film, a composite sheet thereof, an SB nonwoven fabric, and an SMS nonwoven fabric. Examples of the material of the cover sheet 5 include polyolefin materials such as polypropylene and polyethylene. The weight per unit area of the cover sheet 5 is, for example, 5g/m²～100g/m²Preferably 10g/m²～50g/m². The dimension (thickness) of the cover sheet 5 in the thickness direction T is, for example, 0.1mm to 5mm, preferably 0.1mm to 2 mm. In another embodiment, the number of cover sheets is one or more than three (not shown). In yet another embodiment, the cover sheet is not folded back (not shown).

[ absorbent body ]

In the present embodiment, the absorbent body 10 has a substantially rectangular shape, and includes a liquid-permeable front sheet 12, a liquid-impermeable back sheet 13, and an absorbent body 14 that is positioned between the front sheet 12 and the back sheet 13 and absorbs and retains liquid. Examples of the top sheet 12 include a liquid-permeable nonwoven fabric, a woven fabric, a synthetic resin film having liquid-permeable holes formed therein, and a composite sheet thereof. Examples of the back sheet 13 include liquid-impermeable nonwoven fabric, synthetic resin film, composite sheets thereof, and SMS nonwoven fabric. The absorbent body 14 in this embodiment includes an absorbent core for absorbing and retaining liquid and a core wrap sheet enclosing the absorbent core. The absorbent body 14 will be described in detail later. The absorbent body 14, the front sheet 12, and the back sheet 13 are bonded together with an adhesive, and the front sheet 12 and the back sheet 13 are bonded together with an adhesive at their peripheral edge portions. The adhesive is a material known in pants-type diapers, and examples thereof include hot melt adhesives. The shape of the absorbent main body 10 is not limited to the above example as long as it is long in the longitudinal direction L, and examples thereof include a rectangular shape with rounded corners, a rectangular shape with a short side being a curve protruding outward, and an hourglass shape. In another embodiment, the back sheet is omitted, and the non-skin side surface of the absorbent body and the non-skin side surface of the peripheral edge portion of the front sheet are joined to the cover sheet.

(absorber)

Next, the absorbent body 14 will be described with reference to fig. 1 to 3. Fig. 3 is a plan view of the intermediate layer 43 of the absorbent body 14 included in the pants-type diaper 1 according to the present embodiment, as viewed from the non-skin side. The absorbent body 14 is a layer having liquid absorbing performance and liquid retaining performance, and in the present embodiment, the absorbent body 14 includes an absorbent core that absorbs and retains liquid, and the absorbent core includes a core-covering sheet and a laminated absorbent core in which a 1 st absorbent material 45 corresponding to the absorbent core layer, an intermediate layer 43 corresponding to the fabric layer, and a 2 nd absorbent material 47 corresponding to an additional absorbent core layer are laminated in this order from the skin side surface toward the non-skin side surface. In another embodiment, the absorbent body may not include the 2 nd water absorbent material 47. In the present embodiment, the core wrap sheet is formed of the 1 st base material 44 and the 2 nd base material 46. In another embodiment, the absorbent body may not include one of the 1 st base material 44 and the 2 nd base material 46, and in yet another embodiment, the absorbent body may not include both of the 1 st base material 44 and the 2 nd base material 46. In the present embodiment, the absorber 14 can be considered to include: a 1 st absorbent layer 41 which is positioned on the skin side and comprises a 1 st water absorbent material 45 and a 1 st base material 44; a 2 nd absorbent layer 42 which is located on the non-skin side and comprises a 2 nd water absorbent material 47 and a 2 nd base material 46; and an intermediate layer 43 located between the 1 st and 2 nd

absorbent layers

41, 42. In this case, the absorbent body 14 may be regarded as having a two-layer structure in which the 1 st absorbent layer 41, the intermediate layer 43, and the 2 nd absorbent layer 42 are sequentially laminated in the thickness direction T. In another embodiment, the absorbent body has a single-layer structure in which the 1 st absorbent layer and the 2 nd absorbent layer are integrated in the thickness direction without an intermediate layer.

In the present embodiment, the absorber 14 has a substantially rectangular planar shape extending in the longitudinal direction L. However, the shape is not particularly limited, and examples thereof include a rectangle having a short side projecting in an arc shape, a rounded rectangle, an ellipse, and an hourglass shape. The thickness of the absorbent member 14 is, for example, 0.5mm to 20mm, preferably 1mm to 10 mm.

(the 1 st Water-absorbent Material)

In the present embodiment, the 1 st absorbent layer 41 includes the 1 st water absorbent material 45 corresponding to the absorbent core layer as a part of the laminated absorbent core as the absorbent core, and includes the 1 st base material 44 as the core wrap sheet. The 1 st water absorbent 45 is fixed to at least one of the intermediate layer 43 and the 1 st substrate 44 with an adhesive in at least one of a region of at least a part of the surface of the intermediate layer 43 on the 1 st substrate 44 side and a region of at least a part of the surface of the 1 st substrate 44 on the intermediate layer 43 side. The water absorbing material of the 1 st water absorbing material 45 is disposed in the 1 st absorbing layer 41 with a substantially uniform basis weight. However, the weight per unit area of the end portions in the longitudinal direction L and/or the width direction W may be gradually reduced toward the edges. In another embodiment, the water-absorbing materials of the 1 st water-absorbing material are arranged in a predetermined distribution having sites with a greater weight per unit area and sites with a lesser weight within the 1 st absorbent layer. The 1 st water absorbent material has a substantially rectangular planar shape.

(the 2 nd Water-absorbent Material)

In the present embodiment, the 2 nd absorbent layer 42 has the 2 nd water absorbent material 47 which is a part of the laminated absorbent core as the absorbent core and corresponds to an additional absorbent core layer, and has the 2 nd base material 46 as the core wrap sheet. The 2 nd water absorbing material 47 is fixed to at least one of the intermediate layer 43 and the 2 nd base material 46 with an adhesive in at least one of a region of at least a part of the surface of the intermediate layer 43 on the 2 nd base material 46 side and a region of at least a part of the surface of the 2 nd base material 46 on the intermediate layer 43 side. The absorbent material of the 2 nd absorbent material 47 is disposed in the 2 nd absorbent layer 42 with a substantially uniform basis weight except for the pair of channels 48, 48 (described later). However, the weight per unit area of the end portions in the longitudinal direction L and/or the width direction W may be gradually reduced toward the edges.

In the present embodiment, the dimension of the 2 nd water absorbent material 47 in the width direction W is larger than the maximum dimension of the 1 st water absorbent material 45 in the width direction W. In the present embodiment, the dimension of the 2 nd water absorbent material 47 in the longitudinal direction L is larger than the maximum dimension of the 1 st water absorbent material 45 in the longitudinal direction L. In this case, the 2 nd water absorbing material 47 can also be regarded as having a substantially rectangular planar shape which is one turn larger than the 1 st water absorbing material 45 in the width direction W and the length direction L. However, in another embodiment, the dimensions in the width direction W and the length direction L of the 2 nd absorbent member may be the same as the dimensions in the width direction W and the length direction L of the 1 st absorbent member, and in yet another embodiment, the dimensions in the width direction W and the length direction L of the 1 st absorbent member may be larger than the maximum dimensions in the width direction W and the length direction L of the 2 nd absorbent member.

(super absorbent Polymer)

The 1 st water absorbing material 45 and the 2 nd water absorbing material 47 contain Super Absorbent Polymers (SAP). At least the 1 st water absorbent material 45 contains 90 mass% or more of a super absorbent polymer with respect to the total amount of the water absorbent material. Thus, when absorbing body fluid, the functional agent 49 is easily volatilized or dissolved in the body fluid by the temperature of the body fluid, but the 1 st water-absorbent material 45 swells by absorbing water to suppress the amount of the functional agent 49 released to the outside of the pants-type diaper 1, and thus the function of the functional agent 49 is easily maintained. In another embodiment, the 1 st and 2 nd water-absorbing materials contain 90 mass% or more of a super absorbent polymer with respect to the total amount of the water-absorbing materials. The 1 st water absorbent material 45 and the 2 nd water absorbent material 47 may further include hydrophilic fibers such as pulp fibers and water absorbent fibers. Therefore, the 1 st water absorbent material 45 and the 2 nd water absorbent material 47 can be said to contain a super absorbent polymer as a main component, and the absorbent body 14 can be said to be a so-called SAP sheet. The proportion of the super absorbent polymer to the absorbent body 14 (including not only the 1 st and 2 nd water

absorbent materials

45 and 47 but also the adhesive, the 1 st base material 44, the intermediate layer 43, and the 2 nd base material 46) is, for example, 40 to 80% by mass, preferably 50 to 80% by mass, and more preferably 60 to 80% by mass. In the present embodiment, the 1 st water absorbent material 45 and the 2 nd water absorbent material 47 are composed of only a super absorbent polymer and do not contain hydrophilic fibers. In another embodiment, the 1 st and 2 nd water-absorbing materials contain pulp fibers and/or water-absorbing fibers in addition to the super absorbent polymer.

In addition, when determining the content of the super absorbent polymer in the absorbent body 14 and the 1 st and 2 nd water

absorbent materials

45 and 47, the absorbent body 14 may be hollowed out in the thickness direction over a predetermined area, and if necessary, heat or the like may be applied to soften the adhesive, the nonwoven fabric, the adhesive, the super absorbent polymer, pulp fibers, and the like constituting each layer may be separated, the weight of each component may be measured, the weight per unit area of each component may be obtained, and the content of the super absorbent polymer may be determined based on the calculated weight per unit area. The water-absorbent material is a polymer absorbent material represented by a super absorbent polymer, pulp fiber, and water-absorbent fiber.

The super absorbent polymer is not particularly limited as long as it can absorb and retain water, and examples thereof include granular or fibrous super absorbent polymers. The weight per unit area of the super absorbent polymer corresponding to the 1 st water absorbent material 45 of the absorbent core layer can be adjusted as appropriate in accordance with the absorption performance required of the pants-type diaper 1, and is 40g/m²～500g/m²Preferably 100g/m²～400g/m². The superabsorbent polymer of the No. 1 absorbent Material 45 has a basis weight of at least 40g/m²Therefore, the 1 st water absorbent material 45 is filled with the super absorbent polymer over the entire area, and the 1 st water absorbent material 45 easily blocks the functional agent 49 described later from the outside air and the body fluid. This improves the continuity of the function of the functional agent 49. The basis weight of the super absorbent polymer of the 2 nd absorbent material 47 corresponding to the additional absorbent core layer can be appropriately adjusted in accordance with the absorption performance required of the pants-type diaper 1, and is, for example, 10g/m²～500g/m²Preferably 40g/m²～400g/m²More preferably 100g/m²～400g/m². The basis weights of the 1 st water-absorbing material 45 and the 2 nd water-absorbing material 47 may be larger in one than the other, or may be larger in the otherBoth are equal. Wherein, the same means that one is in the range of 100% + -30% of the other.

Examples of the super absorbent polymer include starch-based, cellulose-based, and synthetic polymer-based polymeric absorbents. Examples of the starch-based or cellulose-based super absorbent polymer include a starch-acrylic acid (salt) graft copolymer, a saponified product of a starch-acrylonitrile copolymer, and a crosslinked product of sodium carboxymethylcellulose. Examples of the synthetic polymer-based super absorbent polymer include polyacrylate-based, polysulfonate-based, maleic anhydride-based, polyacrylamide-based, polyvinyl alcohol-based, polyethylene oxide-based, polyaspartate-based, polyglutamate-based, polyalphamate-based, starch-based, and cellulose-based polymers. In the present embodiment, a polyacrylate-based (particularly, sodium polyacrylate-based) super absorbent polymer is preferable. In the present embodiment, it is preferable that 90 to 100 mass% of the superabsorbent polymer in the absorbent body 14 is composed of superabsorbent polymer particles having a particle diameter of 150 to 500 μm. The superabsorbent polymer particles having such a particle size distribution have a small and uniform particle size and are therefore easily retained in the adhesive. The particle diameter of the super absorbent polymer particles is measured in accordance with JIS R6002: the screening test method described in 1998 was standard.

(channel)

In the present embodiment, the absorber 14 has a pair of

channels

48, 48 extending along the longitudinal direction L. The pair of

passages

48, 48 are strip-shaped regions provided in the No. 2 water absorbent material 47, extending in the longitudinal direction L, and arranged at predetermined intervals on both sides in the width direction W with respect to the longitudinal center line CL. The channel 48 is formed at least in the center portion in the longitudinal direction L across the width direction center line CW. In another embodiment, the channel is formed to reach at least one of both end edges in the longitudinal direction L. The pattern of the pair of

passages

48, 48 in plan view is, for example, a pattern formed so that the interval between the two is constant along the longitudinal direction L. In another embodiment, the pattern of the pair of channels is formed such that the interval between the channels is narrower near the center in the longitudinal direction L and expands toward both outer sides in the longitudinal direction L, for example. Here, the channels 48 are regions (low basis weight portions) in which the basis weight of the super absorbent polymer is lower than the regions around the channels of the absorbent body 14, and for example, regions in which the basis weight of the super absorbent polymer is lower than the regions around the channels 48 of the 2 nd absorbent layer 42, including the case where the basis weight is zero. The channels 48 are formed in such a manner that the 2 nd base material 46 is recessed toward the intermediate layer 43 side, that is, the 2 nd water absorbing material 47 is recessed toward the intermediate layer 43 side. In another embodiment, the 2 nd water absorbent material is formed so as to be recessed toward the 2 nd base material side. The pair of

passages

48, 48 overlaps the pair of heat-

seal lands

43c, 43c in the thickness direction T. In another embodiment, at least a part of the passage does not overlap with the heat-seal lands 43c in the thickness direction T. In addition, in another embodiment, the channels do not extend in the length direction L but in the width direction W, or extend not only in the length direction L but also in the width direction W. In yet another embodiment, the channel is one or more than three. In yet another embodiment, the 2 nd absorbent material does not have a pair of

channels

48, 48 and the 1 st absorbent material does have a pair of channels.

(intermediate layer)

In the present embodiment, the intermediate layer 43 corresponding to the fabric layer is a liquid-permeable sheet having a substantially rectangular planar shape. In the present embodiment, the intermediate layer 43 includes an upper layer 43a and a pair of

lower layers

43b, 43b adjacent to each other on both sides in the width direction W of the non-skin side surface of the upper layer 43 a. The intermediate layer 43 is formed by folding back and overlapping a pair of side portions located on both sides of a central portion in the width direction W toward the non-skin side of the central portion in a sheet member having a substantially rectangular planar shape. At this time, the central portion of the sheet member becomes the upper layer 43a, and the pair of side portions of the sheet member becomes the pair of

lower layers

43b, 43 b. Therefore, both sides of the intermediate layer 43 in the width direction W have a two-layer structure in which the upper layer 43a and the lower layer 43b are stacked, and have a substantially rectangular shape extending in the longitudinal direction L. The portion 43d in the vicinity of the center of the intermediate layer 43 in the width direction W has a single-layer structure of only the upper layer 43a, and has a substantially rectangular shape extending in the longitudinal direction L. The upper layer 43a and the lower layer 43b of the two-layer structure are joined by a pair of heat-

seal portions

43c, 43c extending in the longitudinal direction L on both sides in the width direction W of the portion 43 d. The heat-seal lands 43c are formed by heating and compressing. In another embodiment, the upper and lower layers of the two-layer structure are joined by embossed portions extending along the longitudinal direction L on both sides in the width direction W of a portion in the vicinity of the center in the width direction W. The embossed portion is formed by compression. In another embodiment, the heat-seal land and the embossed land have a shape of a plurality of dots, a plurality of curves, or a pattern. Both end edges in the width direction W of the intermediate layer 43 are sandwiched and bonded to both end portions in the width direction W of the 1 st base material 44 and the 2 nd base material 46, and both end edges in the length direction L of the intermediate layer 43 are sandwiched and bonded to both end portions in the length direction L of the 1 st base material 44 and the 2 nd base material 46. In another embodiment, both end edges in the longitudinal direction L are not sandwiched between both end portions in the longitudinal direction L of the 1 st base material and the 2 nd base material, and are not joined. By adopting the double-layer structure, the liquid can be stored temporarily, and the time required for the super absorbent polymer to absorb can be easily ensured.

As the intermediate layer 43, for example, the same sheet as the 1 st substrate 44 can be used. The weight per unit area of the intermediate layer 43 is, for example, 10g/m²～100g/m²Preferably 15g/m²～80g/m². The thickness of the intermediate layer 43 is, for example, 0.1mm to 5mm, preferably 0.15mm to 3 mm. In the present embodiment, the intermediate layer 43 is a hot-air nonwoven fabric. By using a bulky hot air nonwoven fabric as the intermediate layer 43, the intermediate layer 43 can easily hold the functional agent 49 described later, and the functional agent 49 can easily diffuse inside the intermediate layer 43, so that the function of the functional agent 49 can be maintained, and the function of the functional agent 49 can be easily exhibited when absorbing body fluid. In another embodiment, the intermediate layer is a nonwoven air-through fabric having hydrophilicity and liquid permeability and formed of thermoplastic synthetic fibers. In this case, liquid permeability can be ensured even when the absorbent body absorbs water. In particular, the above-mentioned through-air nonwoven fabric is formed of a nonwoven fabric in which fibers are thermally fused with each other, and is therefore directed toThe load from the outside is resistant to a certain degree, and even when the super absorbent polymer contained in the absorbent body 14 absorbs water and swells, deformation of the absorbent body 14 can be effectively prevented.

In the present embodiment, a sheath-core conjugate fiber is used as the fiber constituting the hot-air non-woven fabric, and a thermoplastic resin is used as at least a sheath component constituting the fiber surface in the sheath-core conjugate fiber. By using a thermoplastic resin as the sheath component constituting the fiber surface, the fiber exhibits thermal fusion characteristics, and therefore the resin component used as the core component can be appropriately selected in accordance with the desired physical properties of the intermediate layer 43. For example, as the sheath-core conjugate fiber, a conjugate fiber using a resin component having relatively high strength as a core component not constituting the fiber surface can be used, and thus an intermediate layer having more stable resistance against tensile stress and the like can be provided. Examples of the resin that can be used as the core component and the sheath component include polyolefins such as polyethylene, polypropylene, ethylene-vinyl acetate copolymer, ethylene-ethyl acrylate copolymer, ethylene-acrylic acid copolymer, and ionomer resin; polyesters such as polyethylene terephthalate, polybutylene terephthalate, polytrimethylene terephthalate, and polylactic acid; polyamides such as nylon and the like are appropriately selected and used in combination. In the present embodiment, for the purpose of achieving both the heat-sealing property and the tensile strength, it is preferable to use a polyolefin resin such as polyethylene or polypropylene as the sheath component, and it is preferable to use the above-mentioned polyolefin resin or a polyester resin such as polyethylene terephthalate as the core component. However, the intermediate layer 43 is not limited to the air-through nonwoven fabric, and may be a liquid-permeable sheet.

In the present embodiment, the intermediate layer 43 may have a super absorbent polymer (not shown) inside thereof. As will be described later, in the present embodiment, when the functional agent 49 is applied to the non-skin side of the intermediate layer 43, by providing the superabsorbent polymer in the interior of the intermediate layer 43, the amount of release of the functional agent 49 to the outside of the pants-type diaper 1 is controlled in addition to the 1 st water-absorbent material 45 when absorbing body fluids, and therefore the continuity of the function of the functional agent 49 is further improved.

(core cladding sheet)

As described above, the absorbent body 14 has the 1 st base material 44 and the 2 nd base material 46 as the core wrap sheet.

The 1 st base material 44 has a substantially rectangular planar shape, and covers the 1 st absorbent material 45 from the skin side in plan view, and the peripheral edge portion of the 1 st base material 44 extends slightly outward from the periphery of the 1 st absorbent material 45. The 2 nd base material 46 has a substantially rectangular planar shape, and covers the 2 nd absorbent material 47 from the non-skin side in plan view, and the peripheral edge portion of the 2 nd base material 46 extends slightly outward from the periphery of the 2 nd absorbent material 47. At this time, both end portions in the width direction W of the 2 nd base material 46 cover both side surfaces of the 2 nd water absorbent material 47, and cover skin-side surfaces of both end portions in the width direction W of the 1 st base material 44. That is, on the skin-side surface of the end portion in the width direction W of the 1 st absorbent layer 41, the end portion in the width direction W of the 2 nd base material 46 and the end portion in the width direction W of the 1 st base material 44 are overlapped and joined.

As described above, the both end portions in the width direction W of the 2 nd base 46 cover the side surfaces in the width direction W of the 2 nd water absorbent 47 and the side surfaces in the width direction W of the 1 st base 44, whereby the 2 nd water absorbent 47 is enclosed in the 2 nd absorbent layer 42 in the width direction W and the 1 st water absorbent 45 is enclosed in the 1 st absorbent layer 41 in the width direction W. In another embodiment, both ends in the width direction W of the 1 st base material cover the side surfaces in the width direction W of the 1 st absorbent material, and cover the side surfaces in the width direction W of the 2 nd base material. In another embodiment, the 1 st base material, the intermediate layer, and the 2 nd base material are laminated and joined in the thickness direction T at both ends in the width direction W.

In the present embodiment, the 1 st base material 44, the intermediate layer 43, and the 2 nd base material 46 are laminated and joined in the thickness direction T at both ends in the longitudinal direction L of the absorbent body 14. Thus, the 1 st water absorbent material 45 is enclosed in the 1 st absorbent layer 41 by the 1 st base material 44 and the intermediate layer 43 in the longitudinal direction L, and the 2 nd water absorbent material 47 is enclosed in the 2 nd absorbent layer 42 by the 2 nd base material 46 and the intermediate layer 43 in the longitudinal direction L. In another embodiment, both ends of the absorbent body in the longitudinal direction L are not covered with the 1 st base material and the 2 nd base material. In another embodiment, the absorbent body does not include the 1 st base material or the 2 nd base material, and in another embodiment, the absorbent body does not include the 1 st base material and the 2 nd base material.

(1 st base material)

The 1 st base material 44 is not particularly limited as long as it is a liquid-permeable sheet. Examples of the 1 st substrate 44 include a liquid-permeable nonwoven fabric, a hydrophilic nonwoven fabric, and a laminated nonwoven fabric thereof, and among them, a nonwoven fabric having high water permeability is preferable. Examples of the nonwoven fabric include a spunbond nonwoven fabric and a through-air nonwoven fabric formed of polyolefin fibers such as Polyethylene (PE) and polypropylene (PP), polyester fibers such as polyethylene terephthalate (PET), polytrimethylene terephthalate (PTT) and polyethylene naphthalate (PEN), and a combination thereof. These fibers are preferably subjected to hydrophilization treatment by a known method. Alternatively, for example, an air-laid nonwoven fabric in which hydrophilic fibers such as pulp fibers and rayon fibers are coated with a hydrophilic binder, and a spunlace nonwoven fabric in which the hydrophilic fibers and the synthetic fibers are combined may be mentioned. In the present embodiment, an air-laid nonwoven fabric having liquid permeability and liquid retention properties, in which pulp fibers are coated with a hydrophilic binder, is used. Further, as the 1 st base material 44, one kind or plural kinds of the above nonwoven fabrics may be laminated in plural. The weight per unit area of the 1 st substrate 44 is, for example, 10g/m²～100g/m²Preferably 20g/m²～80g/m². The thickness of the 1 st substrate 44 is, for example, 0.1mm to 5mm, preferably 0.15mm to 3 mm.

(2 nd base material)

The 2 nd substrate 46 is not particularly limited as long as it is a sheet having water retentivity and liquid diffusibility. The fibers constituting the 2 nd substrate 46 include water-absorbent fibers, and the sheet having water retentivity and liquid diffusibility includes a water-absorbent nonwoven fabric. Thus, the 2 nd base material 46 can easily diffuse the body fluid in the longitudinal direction L and the width direction W, and the 2 nd water absorbent material 47 can be made uniformAbsorbs water, and therefore the absorbent body 14 is less likely to lose its shape. Examples of the water-absorbent fibers include synthetic fibers such as polyamide fibers, regenerated fibers such as rayon fibers and acetate fibers, and natural fibers such as cotton, silk, hemp and pulp (cellulose) fibers, and examples of the water-absorbent nonwoven fabric formed of the water-absorbent fibers include a nonwoven fabric formed using only 1 type of the water-absorbent fibers described above, or a nonwoven fabric formed by combining a plurality of types of the water-absorbent fibers. Specifically, for example, a spunbonded nonwoven fabric containing nylon and a spunlace nonwoven fabric containing rayon fibers and/or pulp fibers can be cited. Since spunlace nonwoven fabrics and spunbond nonwoven fabrics containing water-absorbent fibers are excellent in the diffusion of body fluid in the longitudinal direction L and the width direction W, the absorbent body 14 is less likely to be deformed when absorbing body fluid. The spun lace nonwoven fabric containing rayon fibers and/or pulp fibers may also contain polyolefin fibers and/or polyester fibers. In the present embodiment, a spunlace nonwoven fabric containing rayon fibers and pulp fibers, which has liquid retention and liquid diffusion properties, is used. Further, as the 2 nd base material 46, one kind or plural kinds of the above nonwoven fabrics may be laminated in plural. The weight per unit area of the 2 nd substrate 46 is, for example, 10g/m²～200g/m²Preferably 35g/m²～150g/m². The thickness of the 2 nd substrate 46 is, for example, 0.1mm to 5mm, preferably 0.15mm to 3 mm.

In another embodiment, both the 1 st base material and the 2 nd base material may be a sheet having water retentivity and liquid diffusibility.

(Adhesives)

The adhesive applied to the 1 st substrate 44, the intermediate layer 43, and the 2 nd substrate 46 is not particularly limited as long as it can fix the super absorbent polymer, and examples thereof include a hot melt adhesive. The pattern of the adhesive to be applied is not particularly limited, and examples thereof include a continuous or intermittent Ω pattern, a spiral pattern, and a line pattern. The basis weight of the adhesive can be appropriately adjusted so as not to significantly reduce the liquid absorbency of the absorbent body 14, for example, each layer of adhesiveThe weight per unit area of (A) is 3g/m²～50g/m². Each layer is a layer of the adhesive between the 1 st water absorbent material 45 and the 1 st base 44, a layer of the adhesive between the 1 st water absorbent material 45 and the intermediate layer 43, a layer of the adhesive between the 2 nd water absorbent material 47 and the 2 nd base 46, and a layer of the adhesive between the 2 nd water absorbent material 47 and the intermediate layer 43.

(functional agent)

In the present embodiment, a functional agent 49 containing a volatile or water-soluble functional component is applied to the skin-side surface or the non-skin-side surface of the intermediate layer 43 located between the 1 st water absorbent material 45 and the back sheet 13. Thus, the 1 st water absorbent material 45 is present on the skin side of the functional agent 49 before absorbing body fluid, and the functional agent 49 is more difficult to contact with the outside air, so that volatilization and diffusion of the functional agent 49 can be prevented. This improves the continuity of the function of the functional agent 49. Further, since the functional agent 49 is applied to the intermediate layer 43, the functional agent 49 is less likely to move from the intermediate layer 43 having a high density to the 1 st water absorbent material 45 having a low density even when physical pressure or the like is applied, and thus the continuity of the function of the functional agent 49 is further improved. In addition, in the present embodiment, since the intermediate layer 43 is disposed between the 1 st water absorbent material 45 and the 2 nd water absorbent material 47, the functional agent 49 is disposed at a position sandwiched between both the 1 st water absorbent material 45 and the 2 nd water absorbent material 47, and therefore, the functional agent is less likely to move to the non-skin side surface and the skin side surface of the absorbent body 14 when absorbing body fluid, and the continuity of the function of the functional agent 49 is further improved. In another embodiment, a functional agent containing a volatile or water-soluble functional component is coated on the 2 nd substrate located between the 1 st water absorbent material and the back sheet. In the present embodiment, the position of application of the functional agent 49 in the thickness direction T of the intermediate layer 43 may be the non-skin side surface of the intermediate layer 43 or the skin side surface of the intermediate layer. In the present embodiment, the functional agent 49 is applied to a position of the intermediate layer 43 that overlaps the excretory opening contact region that is in contact with the excretory opening in the thickness direction T. The functional agent 49 is coated at a position overlapping with the excretory opening abutment portion in the thickness direction T, and therefore the functional agent 49 is easily brought into contact with body fluid, continuity of the function of the functional agent 49 can be ensured and the function is more easily exhibited when body fluid is absorbed. In another embodiment, the functional agent is coated on the 2 nd base material at a position overlapping the longitudinal center line CL in the thickness direction T and extending in the longitudinal direction L.

In the present embodiment, the functional agent 49 includes an oily base and a volatile or water-soluble functional component. Examples of the volatile functional component include a perfume and a cooling component (e.g., menthol). Examples of the water-soluble functional component include water-soluble vitamins (e.g., vitamin B1, vitamin B2, vitamin B3, vitamin B5, vitamin B6, vitamin B7, vitamin B9, vitamin B12, and vitamin C), water-soluble amino acids (e.g., arginine, lysine, and histidine), pH adjusters (e.g., malic acid, succinic acid, citric acid, tartaric acid, and lactic acid) for keeping skin or absorptive articles weakly acidic, antibacterial agents, hydrophilizing agents for increasing diffusion of body fluid in the absorber, and plant extracts (e.g., peony, scutellaria baicalensis, hypericum erectum, chamomile, licorice, peach leaf, mugwort, and perilla extract). The oily base may be in a liquid, solid or gel form, and examples thereof include fatty acid esters (e.g., triglycerides), natural oils (e.g., coconut oil and linseed oil), silicones (e.g., silicone oils and silicone-based resins), and hydrocarbons (e.g., paraffin). In another embodiment, the functional agent 49 contains an oily functional component (e.g., a temperature sensitive component) having an additional function in addition to the above functional components.

In the present embodiment, when the functional agent 49 contains an oil-based agent, the functional agent 49 containing an oil-based agent diffuses in the planar direction of the intermediate layer 43, and the adhesive strength between the 1 st water absorbent material 45 and the intermediate layer 43 in the wet state is lowered, and may be larger than 0cN/10mm and 0.025cN/10mm or less. In such a case, when the absorbent body 14 absorbs bodily fluids, the intermediate layer 43 peels off from the first water absorbent material 45, and the distance between the functional agent 49 located on the non-skin side of the intermediate layer 43 and the surface sheet 12 becomes longer, so that the functional agent 49 hardly reaches the surface sheet 12, and the continuity of the function of the functional agent 49 is further improved.

(urine indicator)

In the present embodiment, the pants-type diaper 1 includes a urine indicator 50 extending in the longitudinal direction L at a position overlapping the longitudinal center line CL in the thickness direction T on the skin-side surface of the back sheet 13, for detecting the excretion of urine. The urine indicator 50 can be a hot melt adhesive containing an indicator (e.g., a pH indicator) that develops color when brought into contact with moisture such as body fluid. In the present embodiment, the functional agent 49 includes the above-described oil base, and is applied to the position of the intermediate layer 43 that overlaps the longitudinal centerline CL in the thickness direction T and extends in the longitudinal direction L, so that the oil base in the functional agent 49 diffuses with the body fluid or also diffuses inside the absorbent body 14 before absorbing the body fluid, and acts on the vicinity of the longitudinal centerline CL of the back sheet 13, thereby making it easy to make the back sheet 13 transparent. Thus, the color reaction of the urine indicator 50 provided at a position extending in the longitudinal direction at a position overlapping the longitudinal center line CL in the thickness direction T on the skin-side surface of the back sheet 13 is easily visually recognized through the back sheet 13.

(leakage-proof wall)

In the present embodiment, the surface of the absorbent main body 10 on the skin side includes a pair of

side sheets

17 and 17 located on both sides in the width direction W and extending in the longitudinal direction L. Each side sheet 17 has a leakage preventing wall 16 and

fastening regions

15, 15. The

fastening regions

15, 15 are positioned at the front and rear ends of the side sheet 17 in the longitudinal direction L and are fastened to the skin-side surface of the absorbent main body 10. The leakage preventing wall 16 is positioned between the front and

rear fixing regions

15, 15 in the longitudinal direction L of the side sheet 17, is adjacent thereto, and is fixed at the outer end edge in the width direction W of the leakage preventing wall 16 on the skin-side surface of the absorbent main body 10, and is non-fixed at the inner end edge in the width direction W of the leakage preventing wall 16. In this case, the leakage preventing walls 16 and the

fastening regions

15, 15 are formed by, for example, inner portions of the side sheets 17 in the width direction W, and outer portions of the side sheets 17 in the width direction W are fastened to the absorbent main body 10. In this manner, the absorbent main body 10 includes the pair of

leakage preventing walls

16, 16. The pair of

leakage preventing walls

16, 16 are disposed so as to face each other at both end portions in the width direction W on the skin side of the absorbent main body 10, and extend continuously along the longitudinal direction L. Each of the leakage preventing walls 16 includes two elastic members 61 for leakage preventing walls extending in the longitudinal direction L at inner ends in the width direction W. The elastic member 61 for the leakage preventing wall is exemplified as a rubber band. In another embodiment, the pair of leakage preventing walls each further folds back an inner end portion in the width direction W to an outer side in the width direction W. In another embodiment, the number of the elastic members for the leakage preventing wall is one or more than three. The pair of

leakage preventing walls

16, 16 are each formed of a hydrophobic sheet, such as a hydrophobic nonwoven fabric. In another embodiment, it is formed of a hydrophilic sheet, such as a hydrophilic nonwoven fabric.

[ leg gather ]

In the present embodiment, the pants-type diaper 1 includes a plurality of leg gather elastic members 8 for leg gathers from the crotch portion 4 to the back portion 3 and the abdomen portion 2. The plurality of leg gather elastic members 8 extend mainly in the longitudinal direction L at both ends in the width direction W of the crotch portion 4. The plurality of leg gather elastic members 8 are for stretching and contracting the pair of leg openings, respectively, and are exemplified by rubber bands.

[ waist gather ]

In the present embodiment, the abdomen-side portion 2 is provided with a plurality of

elastic members

6a, 6b for waist gather between the covering sheet 5a and the covering sheet 5b, and the back-side portion 3 is provided with a plurality of

elastic members

7a, 7b for waist gather between the covering sheet 5a and the covering sheet 5 b. The plurality of

elastic members

6a and 6b are disposed inside and outside the abdominal portion 2 in the longitudinal direction L. The plurality of elastic members 6a are arranged in the longitudinal direction L along the width direction W in predetermined regions on both sides across the longitudinal center line CL at intervals. The predetermined region is a region from the end portion 2a to a portion inside an end edge of the absorbent main body 10 in the width direction W opposed to the end portion 2 a. The plurality of elastic members 6b extend from the one end portion 2a to the other end portion 2a in the width direction W, and are arranged at intervals in the longitudinal direction L. Similarly, the plurality of

elastic members

7a and 7b are disposed inside and outside the back portion 3 in the longitudinal direction L. The plurality of elastic members 7a are arranged in the longitudinal direction L along the width direction W in predetermined regions on both sides across the longitudinal center line CL at intervals from each other. The predetermined region is a region from the end portion 3a to a portion inside an end edge of the absorbent main body 10 in the width direction W opposed to the end portion 3 a. The plurality of elastic members 7b extend from the one end portion 3a to the other end portion 3a in the width direction W and are arranged at intervals in the longitudinal direction L. The plurality of

elastic members

6a, 6b, 7a, and 7b are for extending and contracting the waist opening, and are exemplified by rubber bands. The abdomen-side portion (abdomen-side waistband) 2 and the back-side portion (back-side waistband) 3 may be defined by a range in the longitudinal direction L in which the plurality of

elastic members

6a, 6b, 7a, 7b are arranged.

Next, a method for producing the absorbent body 14 will be described.

First, the sheet for the 2 nd substrate 46 is moved in the longitudinal direction L, and the hot melt adhesive is applied onto the sheet for the 2 nd substrate 46. Next, a super absorbent polymer was sprayed from a super absorbent polymer supply device onto both end portions and a central portion in the width direction W of the sheet for the 2 nd substrate 46 coated with the hot melt adhesive along the length direction L, respectively. At this time, a small amount of the super absorbent polymer is transferred to the region (corresponding to the channel) between the both end portions and the central portion. Next, a sheet for the intermediate layer 43 coated with hot melt adhesive on both sides was laminated on the super absorbent polymer on the sheet for the 2 nd substrate 46. Next, the laminate was moved in the longitudinal direction L, and a super absorbent polymer was sprayed from another super absorbent polymer supply device in the longitudinal direction L onto the central portion in the width direction W of the sheet for the intermediate layer 43 coated with the hot melt adhesive. Next, the sheet for the 1 st substrate 44 coated with the hot melt adhesive was laminated on the super absorbent polymer on the sheet for the intermediate layer 43 so that the hot melt adhesive was located on the super absorbent polymer side. Then, both side portions in the width direction W of the sheet for the 2 nd base material 46 were folded back onto both side portions in the width direction W of the sheet for the 1 st base material 44 to obtain a laminate. After that, the thickness of the laminate is adjusted by passing the laminate through a pair of press rolls, i.e., pressing, to obtain the absorbent body 14.

Next, a method for manufacturing a pants-type diaper using the absorbent body 14 will be described.

A liquid-permeable front sheet 12 is attached to the upper surface (the surface of the 1 st base 44) of the absorbent body 14 produced as described above, and a liquid-impermeable back sheet 13 coated with the urine indicator 50 is attached to the lower surface (the surface of the 2 nd base 46) of the absorbent body 14, thereby obtaining a laminate. Next, the side sheets 17 with the leakage preventing walls 16 are attached to both sides in the width direction W of the laminate to obtain the absorbent main body 10. Thereafter, the absorbent body 10 is attached to the cover sheet 5 (including the elastic members 6, 7, and 8), and both

ends

2a and 2a in the width direction W of the abdomen-side portion 2 and both

ends

3a and 3a in the width direction W of the back-side portion 3 are joined. Thereby, the pants-type diaper 1 is manufactured.

The pants-type diaper of the present invention and the absorber thereof are not limited to the above-described embodiments, and known techniques can be applied by combining the embodiments without departing from the object and spirit of the present invention.

Claims

1. An absorbent article comprising a front sheet, a back sheet, and an absorbent body disposed between the front sheet and the back sheet, and having a longitudinal direction, a width direction, and a thickness direction that are orthogonal to each other,

the absorbent body is provided with at least an absorbent core layer,

2. The absorbent article of claim 1,

the functional agent is coated on the fabric layer.

3. The absorbent article of claim 2, wherein,

4. The absorbent article according to claim 2 or 3, wherein,

the fabric layer is a hot air non-woven fabric.

5. The absorbent article according to claim 2 or 3, wherein,

a super absorbent polymer is present inside the fabric layer,

6. The absorbent article according to claim 2 or 3, wherein,

the functional agent comprises an oily base agent,

7. The absorbent article according to any one of claims 1 to 3, wherein,

8. The absorbent article of claim 1,

9. The absorbent article of claim 8,

the functional agent comprises an oily base agent,