Elastic laminates with improved hysteresis
AssigneeKimberly-Clark Worldwide, Inc.
InventorsPaul Windsor Estey, William Bela Haffner, Jon Edward Tinsley, Susan Elaine Shawver, Stephen Clark Smith
Life of this patent
Estimating the term…
Abstract
A composite elastic material is provided having improved hysteresis comprising a layer of an elastic material bonded to a layer of nonelastic material at least one side. The elastic material layer is made from a blend of a narrow polydispersity number polymer and a conventional elastomer, and the blend is essentially free of low molecular weight polyethylene processing aids. The composite elastic material laminate should have a hysteresis at least 15 percent better than a similar laminate made without the narrow polydispersity number elastomer but with the processing aid.
Claims20
A composite elastic material laminate having improved hysteresis comprising a layer of an elastic material bonded to a layer of nonelastic material on at least one side, wherein said elastic material layer comprises a blend of a narrow polydispersity number polymer and a conventional elastomer and wherein said blend is essentially free of low molecular weight polyethylene processing aids.
A laminate comprising a layer of nonelastic material bonded while necked to an elastic material layer, said elastic material layer comprising a blend of from about 62 to about 80 weight percent of a conventional elastomer and from about 10 to about 30 weight percent of a narrow polydispersity number polyolefin elastomer, wherein said blend is essentially free of low molecular weight polyethylene processing aids, and wherein said laminate has a hysteresis at least 15 percent better than a similar laminate made without said narrow polydispersity number polyolefin elastomer but with said processing aid.
A neck bonded laminate comprising a layer of nonelastic microfiber web material bonded while necked to an elastic film layer, said film comprising a blend of from about 62 to about 80 weight percent of a conventional elastomer and from about 10 to about 30 weight percent of a narrow polydispersity number polyolefin elastomer and wherein said blend is essentially free of low molecular weight polyethylene processing aids.
Dependencies are inferred from the claim text.