Absorbent articles having a breathable stretch laminate
AssigneeThe Procter & Gamble Company
InventorsRenae Fossum, Arman Ashraf
Life of this patent
Estimating the term…
Abstract
An absorbent article may comprise a topsheet; a backsheet joined with the topsheet; an absorbent core between the topsheet and backsheet; and an elastic element comprising a breathable stretch laminate. The breathable stretch laminate may comprise a first substrate; and an elastic member joined to the first substrate, wherein said elastic member comprises a polyurethane. The breathable stretch laminate may exhibit a MVTR greater than about 300 grams per square meter per 24 hours and a force relaxation of less than about 50% after about 10 hours at 100° F. and 50% elongation.
Claims21
An absorbent article comprising:
- a) a topsheet;
- b) a backsheet joined with the topsheet;
- c) an absorbent core between the topsheet and backsheet;
- and
- d) an elastic element comprising a breathable stretch laminate, said breathable stretch laminate comprising
- i) a first substrate;
- and
- ii) a elastic member joined to the first substrate, wherein said elastic member comprises a polyurethane;
- wherein said breathable stretch laminate exhibits a MVTR greater than about 300 grams per square meter per 24 hours and a force relaxation of less than about 50% after about 10 hours at 100° F. and 50% elongation.
A process for making a disposable absorbent article comprising the steps of:
- a) providing a first nonwoven web;
- b) joining an elastic member comprising a first polyurethane to a first region of the first nonwoven web;
- c) incrementally stretching at least a portion of the first region to permanently elongate the nonwoven web thereby forming a stretch laminate, wherein said stretch laminate exhibits a MVTR greater than about 300 grams per square meter per 24 hours and a force relaxation of less than about 50% after about 10 hours at 100° F. and 50% elongation;
- and p1 d) incorporating said stretch laminate into a disposable absorbent article.
A process for making a disposable absorbent article comprising the steps of:
- a) providing a first nonwoven web;
- b) joining an elastic member comprising a first polyurethane to a first region of the first nonwoven web while said elastic member is in an elongated state;
- c) allowing the elastic member to recover to form a stretch laminate, wherein said stretch laminate exhibits a MVTR greater than about 300 grams per square meter per 24 hours and a force relaxation of less than about 50% after about 10 hours at 100° F. and 50% elongation;
- and
- d) incorporating said stretch laminate into a disposable absorbent article.
An absorbent article comprising:
- a) a topsheet;
- b) a backsheet joined with the topsheet;
- c) an absorbent core between the topsheet and backsheet;
- and
- d) an elastic element comprising a breathable zero strain stretch laminate comprising
- i) an incrementally stretched first nonwoven;
- and
- ii) a elastic member joined to the incrementally stretched first nonwoven, wherein said elastic member comprises a phase-separating material having at least a first phase with a first glass transition temperature of less than −40° C. and a second phase with a second glass transition temperature of greater than 100° C., and wherein said second phase comprises a polyurethane;
- wherein said breathable zero strain stretch laminate exhibits a MVTR greater than about 300 grams per square meter per 24 hours, a force relaxation of less than about 50% after about 10 hours at 100° F. and 50% elongation, and a first cycle 200% load to 50% unload ratio of less than about 16.
Dependencies are inferred from the claim text.