Pant-type absorbent article with waist guard
Inventors
Surushe, Abhishek Prakash • Luan, Lan • Yang, Qiuxia • Ponomarenko, Ekaterina • Huhn, Wolfgang Edgar
Assignees
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Publication Number
US-12564522-B2
Publication Date
2026-03-03
Expiration Date
Abstract
Disclosed is a pant type absorbent article having a waist guard on the back elastic belt, wherein the waist guard comprises a waist guard elastic portion. The absorbent article has a Blowout Percent Leakage of less than 1% when subjected to the Blowout Method herein.
Core Innovation
Disclosed is a pant-type absorbent article having a longitudinal direction and a transverse direction, with a front elastic belt, a back elastic belt, and a crotch region extending longitudinally between the front elastic belt and the back elastic belt. The absorbent main body includes a topsheet, a backsheet, and an absorbent material region sandwiched between, and is connected with the front elastic belt and the back elastic belt extending an entire longitudinal dimension of the crotch region. The article further includes a pair of side seams joining the front elastic belt and the back elastic belt to form a waist opening and a pair of leg openings.
The back elastic belt is defined as a laminate comprising a plurality of elastic members sandwiched between an outer sheet and an inner sheet, and includes a distal edge, a proximal edge, and zones extending in the transverse direction defined relative to a percentage of a seam length LS. A waist guard extends toward the crotch region from a closed base line toward an open edge, is partially bonded to the back elastic belt to define a pocket, and the pocket superposes the backsheet. An entirety of the pocket is provided within a location from 5% to 60% of LS, and the outer sheet is folded at a first fold line and a second fold line to define the waist guard, including positioning of a second portion between the first portion and the inner sheet.
The waist guard comprises a waist guard elastic portion in an area defining the pocket, where an area of the back elastic belt superposing the waist guard elastic portion is defined as a correlated portion, and the tensile stress of the waist guard elastic portion is different than that of the correlated portion. The article also defines absorbent performance and fit-related parameters, including a Blowout Percent Leakage of less than 4% when subjected to the Blowout Method, and a Waist Circumference Force of more than 5.6 N as measured in accordance with the Waist Circumference Force test methods set out herein.
Claims Coverage
The independent claim set consists of 1 independent claim. It includes structural requirements for an absorbent article with a back elastic belt laminate and a waist guard forming a pocket, plus a defined tensile-stress relationship between a waist guard elastic portion and a correlated portion, and quantitative performance and fit thresholds including Blowout Percent Leakage and Waist Circumference Force.
Waist guard pocket superposing the backsheet within a seam-length location range
A waist guard extending toward the crotch region from a closed base line toward an open edge, wherein the waist guard is partially bonded to the back elastic belt to define a pocket, wherein the pocket superposes the backsheet and an entirety of the pocket is provided within a location of from 5% to 60% of LS.
Back elastic belt laminate with folded outer sheet defining waist guard edges
A back elastic belt comprising a laminate of a plurality of elastic members sandwiched between an outer sheet and an inner sheet, and wherein the outer sheet is folded at a first fold line and a second fold line to define the waist guard, where the first fold line defines the distal edge of the back elastic belt and the second fold line defines the open edge of the waist guard, including specified longitudinal inward and away-extending portions of the outer sheet and placement of a second portion between the first portion and the inner sheet.
Different tensile stress between waist guard elastic portion and correlated portion
A waist guard comprising a waist guard elastic portion in an area defining the pocket, where an area of the back elastic belt superposing the waist guard elastic portion is defined as a correlated portion, wherein the tensile stress of the waist guard elastic portion is different than that of the correlated portion.
Blowout Percent Leakage and Waist Circumference Force thresholds
An absorbent article comprising a Blowout Percent Leakage of less than 4% when subjected to the Blowout Method herein, and comprising a Waist Circumference Force of more than 5.6 N as measured in accordance with the Waist Circumference Force test methods set out herein.
Across the independent claim, the core inventive coverage combines a back-elastic-belt laminate with a waist guard partially bonded to define a pocket that superposes the backsheet, a defined relationship of tensile stress between the waist guard elastic portion and a correlated portion, and quantitative thresholds for Blowout Percent Leakage and Waist Circumference Force.
Stated Advantages
Improved containment indicated by Blowout Percent Leakage of less than 4% when subjected to the Blowout Method.
Fit/retention indicated by a Waist Circumference Force of more than 5.6 N as measured in accordance with the Waist Circumference Force test methods set out herein.
Documented Applications
Not explicitly described in patent.
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