Stock material or miscellaneous articles – Web or sheet containing structurally defined element or... – Composite having voids in a component
Patent
1997-09-16
1999-10-19
Copenheaver, Blaine R.
Stock material or miscellaneous articles
Web or sheet containing structurally defined element or...
Composite having voids in a component
4283157, 4283179, 521 76, 521142, 521905, 521911, B32B 326
Patent
active
059686430
ABSTRACT:
A microporous, hydrophilic polymer film has a morphology composed of distinctively interconnected pores, which are desirably surface-open. In particular aspects, the film can provide for a water vapor transmission rate (WVTR) value of at least about 1000 grams per square meter per 24 hours per mil (0.00254 cm) of film thickness. The film can exhibit a modulus of not less than about 1 MPa, and may also exhibit an elongation strain at break of at least about 100% in both its machine and transverse directions. The film can also provide for a water contact angle of not more than about 80 degrees. In other aspects, the porous film can also include other properties or characteristics, such as a desired tensile strength at break, a desired elongation-at-break, and voids or pores having distinctive shapes, sizes, distributions and configurations.
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Topolkaraev Vasily Aramovich
Tsai Fu-Jya
Copenheaver Blaine R.
Kimberly--Clark Worldwide, Inc.
Yee Paul
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