Spatially modified elastic laminates

CAFC
  • US 5,344,691 A
  • Filed: 03/30/1990
  • Issued: 09/06/1994
  • Est. Priority Date: 03/30/1990
  • Status: Expired due to Term
First Claim
Patent Images

1. A multi-layer film laminate comprising at least one nonelastomeric skin film layer and at least one core film layer, the at least one skin film layer and the at least one core film layer together forming at least one preferential activation zone where the film laminate will preferentially elongate when stretched, wherein said at least one core film layer is substantially elastomeric, each of said core and skin layers being substantially coextensive and having relatively constant average thicknesses over both the at least one preferential activation zone and an at least one adjacent non-preferential activation zone such that, for a given skin or core layer, the skin or core layer thickness in one zone will be substantially the same as the same skin or core layer thickness in all zones, said at least one skin film layer and/or at least one core film layer are provided such that when the multi-layer laminate is stretched said at least one preferential activation zone will preferentially elongate and can recover in said preferential activation zone to become an elastic zone, of said multi-layer film laminate, and adjacent multi-layer non-preferential activation zones will not preferentially elongate to provide substantially inelastic zones.

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