Elastic nonwoven sheet.

Elastic nonwoven sheet. U.S. Patent No. 8,067,318 B2. Kenneth E. Martin, Newark, DE, Assigned to Invista North America, Wilmington, DE.

Filed: 7/31/08

Approved: 11/29/11

Invista has received a patent for a stretchable nonwoven sheet consisting of a necked nonwoven substrate substantially uniformly impregnated with an elastomeric polymer solution without forming an elastomeric polymer layer on either surface of said substrate, the stretchable nonwoven sheet having a ratio of third unload cycle force at 100% elongation to third load cycle force at 100% elongation, after the stretchable nonwoven sheet has been extended to 140% in the necked direction three times, of at least 0.3: 1, wherein the necked nonwoven substrate has a percent elongation in a cross-direction of between about 30% and about 300% and, wherein the stretchable nonwoven sheet has a thickness of 0.25 mm to 0.75 mm.