3m Innovative Properties Company

Minnesota Mining and Manufacturing Company

Gari P Krogseng

Dennis L Krueger

Clinton P Waller, Jr

Jeffrey C Chang

James Stephen Mrozinski

Philip D Radovanovic

Andrew B Becker

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.

Temperature-sensitive microporous film

A thermal dye transfer system comprises a thermal dye transfer receptor element in intimate contact with a thermal dye donor sheet, said receptor element comprising a substrate having on at least one surface thereof in contact with said dye transfer donor sheet, a dye receptive receiving layer comprising a microporous polymer layer having insufficient pigment to provide an optical density of more than 0.2. The polymer layer may be transparentizable and provides thermal insulation.

Transparentizable thermal insulating film for thermal transfer imaging

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Saint Paul, MN, United States of America

Gari P Krogseng