Process for adjusting WVTR and other properties of a...

Details Process for adjusting WVTR and other properties of a... Process for adjusting WVTR and other properties of a...

2005-01-18

2005-01-18

Eashoo, Mark (Department: 1732)

Plastic and nonmetallic article shaping or treating: processes

Forming continuous or indefinite length work

Shaping by extrusion

C264S288800, C428S500000

Reexamination Certificate

active

06843949

ABSTRACT:
A process for rendering films, film composites, and articles made therefrom less resistant to passage of water vapor by passing a filled precursor film or film composite through the nip of interdigitating grooved rollers. The films or film composites are generally formed using a precursor film of a film forming polyolefin or polyolefin blend, with a relatively high filler loading and optionally an elastomer. A process is disclosed for making diapers or other disposable items where a relatively high water vapor is coupled with a resistance to liquid strikethrough. In one embodiment of the invention, the interdigitating grooved rollers are maintained in a temperature range of from about 91° F. to about 159° F.

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