JP2023096859A5

JP2023096859A5 -

Info

Publication number: JP2023096859A5
Application number: JP2021212880A
Authority: JP
Filing date: 2021-12-27
Publication date: 2023-10-19
Anticipated expiration: 2041-12-27

Claims

comprising a vertical direction extending from the ventral side of the wearer through the groin region to the dorsal side, and a horizontal direction corresponding to the vertical direction, and
An exterior sheath comprising an absorbent main body, and a ventral region and a dorsal region disposed on the non-skin-facing side of the absorbent main body and located on both sides in the longitudinal direction, and configured by laminating a plurality of thermoplastic sheets. A pants-type absorbent article comprising: a body; and a pair of side joints that join the ventral region and the dorsal region of the exterior body at the lateral side edges,
The pair of side joints are
A waist end region within 25 mm in the longitudinal direction from the waist end that is the end on the waist side in the longitudinal direction;
each having a leg end region within 25 mm in the longitudinal direction from the leg end that is the end on the leg side in the longitudinal direction,
At least one of the pair of side joints,
further comprising a plurality of seal rows arranged in at least one of the waist end region or the leg end region along the lateral direction, each comprising a plurality of seal parts arranged in a spaced manner along the longitudinal direction; have,
In the plurality of seal rows, the seal portions belonging to the seal rows adjacent to each other in the lateral direction are spaced apart in the lateral direction,
The plurality of seal parts included in the plurality of seal rows are arranged in a lattice shape aligned along the vertical direction and the horizontal direction,
Of the two horizontally adjacent seal sections belonging to different seal rows, the seal section located on the inner side in the transverse direction has a lower degree of fiber melting than the seal section located on the outer side in the transverse direction.
Pants-type absorbent article.

When the outermost seal row in the lateral direction is an outer seal row, and the seal row adjacent to the outer seal row on the inner side in the lateral direction is an inner seal row,
The distance in the lateral direction between the laterally outer outer end of the seal portion of the outer seal row and the laterally inner inner end of the seal portion of the inner seal row is a first dimension. and
The pants-type absorbent article according to claim 1 , wherein in the outer seal row, the plurality of seal parts are arranged in the longitudinal direction at intervals of a second dimension smaller than the first dimension.

At least one of the waist end region or the leg end region including the plurality of seal rows is cut out into a rectangular shape with a length of 10 mm in the longitudinal direction and the entire width of the side joint in the lateral direction. When the seal strength was measured by forming a sample for measurement and peeling the sample for measurement from the inside to the outside in the lateral direction at a speed of 10 mm/min,
The pants-type absorbent article according to claim 1 , wherein a minimum strength between peak strengths corresponding to the plurality of seal rows is greater than 0N.

Three or more seal rows as the plurality of seal rows are arranged in at least one of the waist end region or the leg end region,
When the seal strength of at least one of the waist end region or the leg end region including the three or more seal rows is measured, three or more peak intensities corresponding to the three or more seal rows are measured,
The pants-type absorbent article according to claim 3 , wherein the minimum intensity among the three or more peak intensities increases in the order measured from the inner side to the outer side in the lateral direction.

The ventral region and the dorsal region each include:
A plurality of elastic members extending in the lateral direction are arranged, and have a first elastic region and a second elastic region extending in the lateral direction from one of the pair of side joints to the other,
the first elastic region extends in the lateral direction from the waist end region;
The second elastic region is adjacent to the first elastic region in the longitudinal direction and extends in the horizontal direction from a region of the side joint portion excluding the waist end region,
The pants-type absorbent article according to claim 1 , wherein an average elongation rate of the plurality of elastic members in the first elastic region is lower than an average elongation rate of the plurality of elastic members in the second elastic region.

The side joint portion is
a first seal region and a second seal region each including a plurality of seal portions having a regular planar shape and arrangement, extending over the entire width of the side joint portion in the lateral direction, and adjacent in the longitudinal direction;
a first laminated section in which six or more of the thermoplastic sheets are laminated, at least a portion of which is disposed in the first sealing area;
a second laminated part in which a smaller number of the thermoplastic sheets than in the first laminated part are laminated, and at least a part of which is disposed in the second sealing area;
At least one of the planar shape or arrangement of the plurality of seal parts is different in the first seal area and the second seal area,
The ratio of the total area of a plurality of seal parts included in the first seal area to the entire area of the first seal area is the ratio of the total area of a plurality of seal parts included in the second seal area to the entire area of the second seal area. The pants-type absorbent article according to claim 1, wherein the proportion of the total area of the seal portion is smaller than the ratio of the total area of the seal portion.

The pants-type absorbent article according to claim 6 , wherein the first seal area extends from the first laminated portion to a part of the second laminated portion.

The side joint portion is
a first laminated part in which six or more of the thermoplastic sheets including the first skin-side sheet constituting the skin-facing surface are laminated;
further comprising a second laminated part in which a smaller number of the thermoplastic sheets than the first laminated part are laminated, including a second skin-side sheet constituting the skin-facing surface;
The first skin-side sheet and the second skin-side sheet are each made of a spunbond nonwoven fabric including a plurality of embossments,
The pants-type absorbent article according to any one of claims 1 to 7 , wherein the area ratio of the embossing on the first skin-side sheet is higher than the area ratio of the embossing on the second skin-side sheet.

The side joint portion is
a first laminated part in which six or more of the thermoplastic sheets including the first skin-side sheet constituting the skin-facing surface are laminated;
a second laminated part in which a smaller number of the thermoplastic sheets than the first laminated part are laminated, including a second skin-side sheet constituting the skin-facing surface;
The pants-type absorbent article according to any one of claims 1 to 7 , wherein the melting point of the first skin-side sheet is higher than the melting point of the second skin-side sheet.

The side joint portion is
a first laminated part in which six or more of the thermoplastic sheets including the first skin-side sheet constituting the skin-facing surface are laminated;
a second laminated part in which a smaller number of the thermoplastic sheets than the first laminated part are laminated, including a second skin-side sheet constituting the skin-facing surface;
The pants-type absorbent article according to any one of claims 1 to 7 , wherein the first skin-side sheet has a basis weight lower than the second skin-side sheet.