JP-7855518-B2 - Absorbent panty-type items

JP7855518B2JP 7855518 B2JP7855518 B2JP 7855518B2JP-7855518-B2

Inventors

川上祐介
永井貴仁
田中傑
王茵▲華▼
▲鄭▼ 凌霜

Assignees

ユニ・チャーム株式会社

Dates

Publication Date: 20260508
Application Date: 20210930
Priority Date: 20200930

Claims (15)

It has intersecting vertical, horizontal, and front-to-back directions, A liquid-absorbing absorbent body, A body member in which the front body portion and the rear body portion are joined in an annular manner by a pair of side joints provided at both ends in the left-right direction, It has, A pair of pant-type absorbent articles having a pair of leg openings for the wearer to pass through, Of the torso member, a hydrophilic region is provided on the non-skin side of at least a portion of the area that overlaps with the pair of side joints in the vertical direction. In the region along the leg opening, at least the portion located at the lowest end, on the non-skin side, is provided with a hydrophobic region that is less hydrophilic than the hydrophilic region. The waist member comprises a skin-side sheet, a non-skin-side sheet laminated adjacent to the non-skin side of the skin-side sheet, and a waist elastic member provided between the skin-side sheet and the non-skin-side sheet. The aforementioned skin-facing sheet is a hydrophobic nonwoven fabric. The non-skin side sheet is a hydrophilic nonwoven fabric. The hydrophilic region is composed of the hydrophilic nonwoven fabric, At the upper end of the front waist portion in the vertical direction, a folded portion is provided in which the hydrophilic nonwoven fabric, which serves as the non-skin-facing sheet, is folded back toward the skin side. The aforementioned folded portion is the part that is most exposed to the skin, characterized in that it is a pant-type absorbent article.
The absorbent pant-type article according to claim 1, In the unfolded state of the absorbent body, the front waist portion is joined to one side in the vertical direction, and the rear waist portion is joined to the other side in the vertical direction. A hydrophilic nonwoven fabric is provided on the non-skin side of at least one of the front and rear waist sections. A pant-type absorbent article characterized in that a hydrophobic nonwoven fabric with lower hydrophilicity than a hydrophilic nonwoven fabric is provided on the non-skin side of the absorbent main body.
The absorbent pant-type article according to claim 1, The aforementioned body circumference member is integrally constructed such that, in the unfolded state, the front body circumference portion and the rear body circumference portion are continuous in the vertical direction. The waist member is joined to the non-skin side of the absorbent body. A hydrophilic nonwoven fabric is provided on the side of the torso member that is not exposed to the skin. A hydrophobic nonwoven fabric with lower hydrophilicity than the hydrophilic nonwoven fabric is provided on the non-skin side of the absorbent body. A pant-type absorbent article characterized in that, in the left-right direction, the minimum width of the waist member is smaller than the minimum width of the absorbent body.
The absorbent pant-type article according to claim 3, A pant-type absorbent article characterized in that, in the left-right direction, the distance between the outermost end of the absorbent body and the innermost end of the waist member is less than half the distance between the outermost end of the waist member and the innermost end of the waist member.
A pant-type absorbent article according to any one of claims 2 to 4, The leg opening has a first region formed by the body member and a second region formed by the absorbent body, at the lower end of the side joint and below the lower end. A pant-type absorbent article characterized in that the area furthest from the skin in the first region is a hydrophilic region, and the area furthest from the skin in the second region is a hydrophobic region.
The absorbent pant-type article according to claim 5, A pant-type absorbent article characterized in that the length of the portion of the pant-type absorbent article in the unfolded state that is in front of the longitudinal center position and along the second region is longer than the length of the portion of the pant-type absorbent article that is behind the center position and along the second region.
A pant-type absorbent article according to claim 5 or 6, A pant-type absorbent article characterized in that the length of the portion along the first region behind the longitudinal center position of the unfolded pant-type absorbent article is longer than the length of the portion along the first region in front of the center position.
The absorbent pant-type article according to claim 1, The aforementioned skin-side sheet has a front skin-side sheet and a rear skin-side sheet. The non-skin side sheet has a front non-skin side sheet and a rear non-skin side sheet. The front torso portion has the front skin-facing sheet and the front non-skin-facing sheet, The rear torso portion has the rear skin-facing sheet and the rear non-skin-facing sheet, The front-side sheet and the rear-side sheet are, in the unfolded state, a continuous, integrated sheet member in the longitudinal direction. The aforementioned front non-skin sheet and the aforementioned rear non-skin sheet are different sheet members that are discontinuous in the longitudinal direction when unfolded. The waist member is joined to the non-skin side of the absorbent body. The different sheet members constituting the aforementioned front non-skin sheet and the aforementioned rear non-skin sheet are the hydrophilic nonwoven fabric, The pant-type absorbent article is characterized in that the integral sheet members constituting the front skin-facing sheet and the rear skin-facing sheet are made of a hydrophobic nonwoven fabric that is less hydrophilic than the hydrophilic nonwoven fabric.
The absorbent pant-type article according to claim 8, In the left-right direction, the minimum width of the waist member is greater than the minimum width of the absorbent body. The leg opening is formed by the body member below the lower end of the side joint and has a first region comprising the front non-skin sheet and the rear non-skin sheet, and a second region comprising the front skin sheet and the rear skin sheet but not comprising the front non-skin sheet and the rear non-skin sheet. A pant-type absorbent article characterized in that the area furthest from the skin in the first region is a hydrophilic region, and the area furthest from the skin in the second region is a hydrophobic region.
The absorbent pant-type article according to claim 9, The pant-type absorbent article is characterized in that, in the second region, the sheet member positioned on the non-skin side of the absorbent body is only one sheet of the hydrophobic nonwoven fabric.
The absorbent pant-type article according to claim 8, In the left-right direction, the minimum width of the waist member is smaller than the minimum width of the absorbent body. The leg opening has a first region formed by the body member and a second region formed by the absorbent body, at the lower end of the side joint and below the lower end. A pant-type absorbent article characterized in that the area furthest from the skin in the first region is a hydrophilic region, and the area furthest from the skin in the second region is a hydrophobic region.
A pant-type absorbent article according to any one of claims 9 to 11, A pant-type absorbent article characterized in that the length of the portion of the pant-type absorbent article in the unfolded state that is in front of the longitudinal center position and along the second region is longer than the length of the portion of the pant-type absorbent article that is behind the center position and along the second region.
A pant-type absorbent article according to any one of claims 9 to 12, A pant-type absorbent article characterized in that the length of the portion along the first region behind the longitudinal center position of the unfolded pant-type absorbent article is longer than the length of the portion along the first region in front of the center position.
A pant-type absorbent article according to any one of claims 1 to 13, A pant-type absorbent article characterized in that the outermost layer of the front and rear waist sections is each made of a single hydrophilic nonwoven fabric.
A pant-type absorbent article according to any one of claims 1 to 14, The rear torso portion has a buttock cover below the lower end of the side joint portion, which narrows in the left-right direction from the upper to the lower in the vertical direction. A pant-type absorbent article characterized by having an elastic member that expands and contracts along the edge of the buttock cover.

Description

This invention relates to a pant-type absorbent article. Conventionally, in absorbent articles such as disposable diapers, a technique is known to improve water absorption by using a hydrophilic sheet in the sheet material constituting the absorbent article. For example, Patent Document 1 discloses a disposable diaper in which a skin-side sheet 5 located on the skin side of the wearer and an outer layer sheet 4 located on the non-skin side are made of sheet material such as a nonwoven fabric containing hydrophilic fibers. Furthermore, there are known pant-type diapers that use hydrophilic nonwoven fabrics whose hydrophilicity has been enhanced by impregnating them with hydrophilic oils. For example, Patent Document 1 discloses a technology for disposable diapers in which the outer sheet 4 constituting the outer body 3 of the diaper 1 is a hydrophilic nonwoven fabric having fibers that have been made hydrophilic by means of treating hydrophobic synthetic fibers with a hydrophilizing agent. Japanese Patent Publication No. 2017-113186 This is a schematic perspective view of diaper 1.This is a plan view of diaper 1 in its unfolded and extended state.This is a schematic cross-sectional view along line A-A in Figure 2.Figure 4A is a plan view of the absorbent body 10, and Figure 4B is a schematic cross-sectional view of the absorbent body 10.Figures 5A to 5C illustrate the basic principles of moisture absorption and evaporation in diaper 1.Figure 6A is a diagram illustrating the experimental method for measuring the transpiration rate. Figure 6B is a graph showing the transpiration rate data obtained from the experimental results.Figures 7A and 7B illustrate how the absorbent body 10 fits to the wearer's crotch area when the diaper 1 is worn.This diagram illustrates a method for attaching the elastic waistband member 35 to the front waistband portion 30 using the welded portion 60.This is a plan view of diaper 2 in its unfolded and extended state.Figure 9 is a schematic cross-sectional view along the line B-B.This is a plan view of diaper 3 in its unfolded and extended state.This is a schematic cross-sectional view taken along the line C-C in Figure 11.This is a plan view of a modified example of diaper 3 in an unfolded and extended state.This is a schematic cross-sectional view along line D-D in Figure 13.This is a plan view of diaper 4 in its unfolded and extended state.This is a schematic cross-sectional view of the side joint 50, which connects the front body section 30 and the rear body section 40, as seen along the vertical direction.This is a schematic cross-sectional view showing the cross-sectional shape in the thickness direction of the front body section 30.This is a schematic cross-sectional diagram showing the relationship between the position of the compression portion 31e of the front body portion 30 and the position of the compression portion 41e of the rear body portion 40 at the side joint portion 50.Figure 19A is a plan view of the diaper 5 in its unfolded and extended state. Figure 19B is a schematic cross-sectional view taken along the line B-B in Figure 19A.Figure 20A is a plan view of the diaper 6 in its unfolded and extended state. Figure 20B is a schematic cross-sectional view taken along line C-C in Figure 20A. The following matters become clear from this specification and the accompanying drawings: A pant-type absorbent article comprising an absorbent body that absorbs liquid and has intersecting vertical, left-right, and front-back directions, and a waist member in which a front waist portion and a rear waist portion are joined in an annular manner by a pair of side joints provided at both ends in the left-right direction, and having a pair of leg openings for the wearer's legs to pass through, wherein, of the waist member, in the vertical direction, a hydrophilic region is provided on the non-skin side of at least a portion of the area that overlaps with the pair of side joints, and of the area along the leg openings, at least the non-skin side of the portion located at the lowest end is provided with a hydrophobic region that is less hydrophilic than the hydrophilic region. With this type of absorbent pant, the hydrophilic region on the non-skin side of the waistband absorbs moisture from the wearer's skin and allows the absorbed moisture to evaporate into the atmosphere. Furthermore, when the absorbent pant is worn, the lowest end of the leg opening that contacts the wearer's crotch area becomes a hydrophobic region, making it less likely for the wearer's crotch area to get wet. This reduces contact between moisture and the wearer's skin, particularly suppressing discomfort in the crotch area. Preferably, in such a pant-type absorbent article, the front waist portion is joined to one side in the longitudinal direction when the absorbent body is unfolded, the rear waist portion is joined to the other side in the longitudinal direction, a hydrophilic nonwoven fabric is provided on the