Stock material or miscellaneous articles – Web or sheet containing structurally defined element or... – Composite having voids in a component
Patent
1997-04-29
1999-11-30
Copenheaver, Blaine
Stock material or miscellaneous articles
Web or sheet containing structurally defined element or...
Composite having voids in a component
4283159, 4283166, 428910, B32B 326
Patent
active
059939540
ABSTRACT:
A single or multi-layer microporous material of which at least one layer contains a compatible, melt-processible polymer mixture having a first polymer component with a melting point greater than 140.degree. C. and a second polymer component having a melting point lower than 120.degree. C. is described as well as a method of preparing the material. The first polymer component and the second polymer component are miscible in a compound or compatible liquid when heated above the melting temperature of the first polymer component or above the liquid--liquid phase separation temperature and phase separate from the compound or compatible liquid when cooled. The materials are particularly useful as battery separators.
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Krogseng Gari P.
Krueger Dennis L.
Mrozinski James S.
Radovanovic Philip D.
Waller, Jr. Clinton P.
3M Innovative Properties Company
Copenheaver Blaine
Kokko Kent S.
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