Stock material or miscellaneous articles – Web or sheet containing structurally defined element or... – Composite having voids in a component
Patent
1997-10-31
1999-09-21
Copenheaver, Blaine
Stock material or miscellaneous articles
Web or sheet containing structurally defined element or...
Composite having voids in a component
4283157, 4283159, 4283166, 4283171, 4283179, 4283193, 428913, 442370, 442372, 442374, B32B 326
Patent
active
059551879
ABSTRACT:
A self-regulating breathable microporous film layer transmits water vapor at normal use conditions, and reduces or eliminates the vapor transmission when the vapor in the environment becomes excessive. The film layer includes a voided polymer matrix and a plurality of fine water-swellable filler particles disposed within the voids. When there is an excess of vapor, the filler particles swell to block or partially block transmission of vapor through the voids and the film layer.
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The Merck Index, Encyclopedia of Chemicals and Drugs, Eighth Edition (Dec. 1968), p. 126.
Blaney Carol A.
Cartwright William F.
McCormack Ann Louise
Shultz Jay Sheldon
Strack David Craige
Copenheaver Blaine
Kimberly--Clark Worldwide, Inc.
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