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US 5,382,461 AGranted
Extrusion laminate of incrementally stretched nonwoven fibrous web and thermoplastic film and method
AssigneeClopay Plastic Products Company, Inc.
InventorPai-Chuan Wu
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Abstract
Extrusion laminates of incrementally stretched nonwoven fibrous webs and thermoplastic films are made. A web of spun bonded fibers is incrementally stretched to provide fiber ends extending outwardly from both web surfaces for bonding with the extruded thermoplastic film and to provide a soft fibrous texture to the laminate.
Claims16
An extrusion laminate of a nonwoven fibrous web and a thermoplastic film comprising
- a nonwoven fibrous web having a multitude of fiber ends extending outwardly from both web surfaces formed by incremental stretching of the fibrous web along lines substantially uniformly across the web and throughout its depth, and
- a thermoplastic film extrusion laminated to one surface of said web with said fiber ends extending into said film for bonding said web to said film without penetrating through said film, the other surface of said web having said fiber ends extending outwardly therefrom to provide a soft fibrous texture to the laminate.
A method of inline stretching and extrusion laminating a nonwoven fibrous web to a thermoplastic film which comprises
- providing a nonwoven fibrous web,
- incrementally stretching said fibrous web along lines substantially uniformly across the web and throughout its depth to provide a multitude of fiber ends extending outwardly from both web surfaces,
- introducing said incrementally stretched web into a nip of rollers for extrusion lamination with a thermoplastic film,
- extruding into said nip a thermoplastic extrudate at a temperature above its softening point to form a film,
- controlling the compressive force between said fibrous web and extrudate at the nip to bond one surface of the web with said fiber ends extending into said film without penetrating through the film while maintaining said extending fiber ends on the other surface of the fibrous web to provide a soft fibrous texture to the laminate.
2 more elements
Dependencies are inferred from the claim text.