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US 2017/0246786 A1Published application
Patterned microporous breathable film and method of making the patterned microporous breathable film
OwnerJeffrey A. MIDDLESWORTH, Martin F. HOENIGMANNinventors
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Abstract
Microporous breathable films include a polyolefin and an inorganic filler dispersed in the polyolefin.
Claims21
A process for making a patterned microporous breathable film comprising the steps of
- extruding a composition comprising a polyolefin, an inorganic filler, and a pigment to form a molten web,
- casting the molten web against a surface of a chill roll to form a quenched film, and
- stretching the quenched film to form the patterned microporous breathable film.
Dependencies are inferred from the claim text.