Pant-type absorbent article with waist guard
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.
1 . An absorbent article having a longitudinal direction and a transverse direction, the absorbent article comprising:
a front elastic belt, a back elastic belt, and a crotch region, wherein the crotch region extends longitudinally between the front elastic belt and the back elastic belt;
an absorbent main body connected with the front elastic belt and the back elastic belt extending an entire longitudinal dimension of the crotch region, wherein the absorbent main body comprises: a topsheet, a backsheet, and an absorbent material region sandwiched between;
a pair of side seams that join the front elastic belt and the back elastic belt to form a waist opening and a pair of leg openings, wherein each side seam comprises a seam length LS;
wherein the back elastic belt comprises a laminate comprising a plurality of elastic members sandwiched between an outer sheet and an inner sheet, a distal edge, a proximal edge, and zones extending in the transverse direction defined by locations from the distal edge to the proximal edge relative to a percentage of the seam length LS, wherein the distal edge is defined as 0% and the proximal edge is defined as 100%,
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;
wherein the outer sheet of the back elastic belt is folded at a first fold line and a second fold line to define the waist guard, wherein 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, wherein a first portion of the outer sheet extends longitudinally inwardly toward the crotch region from the first fold line to the second fold line, and wherein a second portion of the outer sheet extends longitudinally away from the crotch region from the second fold line to an edge of the outer sheet, wherein the second portion of the outer sheet is positioned between the first portion of the outer sheet and the inner sheet;
wherein the waist guard comprises a waist guard elastic portion in an area defining the pocket, wherein 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; and
wherein the absorbent article comprises a Blowout Percent Leakage of less than 4% when subjected to the Blowout Method herein; and
wherein the absorbent article comprises a Waist Circumference Force of more than 5.6 N as measured in accordance with the Waist Circumference Force test methods set out herein.
2 . The absorbent article of claim 1 , wherein the absorbent article has an Efficiency Factor of less than 15% when subjected to the Blowout Method herein.
3 . The absorbent article of claim 1 , wherein the waist guard elastic portion has a tensile stress of 20-70 N/m as measured in accordance with the Belt Zone Tensile Stress Measurement set out herein.
4 . The absorbent article of claim 1 , wherein the waist guard elastic portion is elasticized by a plurality elastic strands extending parallel to the transverse direction of the absorbent article.
5 . The absorbent article of claim 4 wherein the plurality of elastic strands of the waist guard elastic portion are spaced from the open edge at a distance of not more than 12 mm.
6 . The absorbent article of claim 4 , wherein a distance between two elastic strands which are closest to the open edge of the waist guard is smaller than a distance between other neighboring elastic strands in the waist guard elastic portion.
7 . The absorbent article of claim 4 , wherein a number of elastic strands adjacent the open edge is higher than a number of elastic strands away from the open edge.
8 . The absorbent article of claim 7 , wherein a complete area of the waist guard defining the pocket is the waist guard elastic portion.
9 . The absorbent article of claim 1 , wherein a longitudinal dimension of the pocket defined as a longest distance between the closed base line to the open edge is from 10 mm to 50 mm.
10 . The absorbent article of claim 1 , wherein a transverse dimension of the pocket is from 40 mm to 120 mm.
11 . The absorbent article of claim 1 , wherein the pocket comprises a transverse dimension defined as a longest distance of the pocket extending parallel to a transverse centerline of the absorbent article from a left side edge of the pocket to a right side edge of the pocket, and wherein the transverse dimension of the pocket is from 40% to 96% of a transverse dimension of a transversely extending edge of the backsheet provided in the back waist region.
12 . The absorbent article of claim 1 , wherein the absorbent main body comprises a pair of leg cuffs disposed along opposing transverse edges extending in the longitudinal direction, wherein the leg cuffs are in active elasticity at the open edge.
13 . The absorbent article of claim 1 , wherein the Waist Circumference Force according to the Whole Article Force Measurement herein is no more than 9N.
14 . The absorbent article of claim 1 , wherein the waist guard is partially bonded to the back elastic belt to define the pocket such that
a bonded portion of the waist guard superposes the backsheet by at least 5 mm along each of left and right side edges of the pocket, thereby defining the left and right side edges of the pocket; and
the bonded portion of the waist guard superposes the backsheet by at least 5 mm along the closed base line of the pocket, thereby defining the closed base line of the pocket.
15 . The absorbent article of claim 1 , wherein the front elastic belt region is divided into 4 zones spanning in the transverse direction and defined by location from a distal edge to a proximal edge relative to the percentage of the seam length LS, wherein the distal edge of the front elastic belt is considered 0% and the proximal edge of the front elastic belt is considered 100% wherein; 0-25% is a front waist zone, 25-50% is a distal tummy zone, 50-85% is a proximal tummy zone, and 85-100% is a leg zone, wherein the proximal tummy zone comprises a higher tensile stress than other zones in the front elastic belt.
16 . The absorbent article of claim 1 , wherein the absorbent article has a dry weight of less than 50 g.