Asymmetric porous polytetrafluoroethylene membrane for clothing

Details Asymmetric porous polytetrafluoroethylene membrane for clothing Asymmetric porous polytetrafluoroethylene membrane for clothing

2007-12-18

2007-12-18

Piziali, Andrew (Department: 1771)

Fabric (woven, knitted, or nonwoven textile or cloth, etc.)

Coated or impregnated woven, knit, or nonwoven fabric which...

Coating or impregnation is specified as water proof

C442S064000, C442S076000, C442S152000, C442S164000, C442S221000, C442S226000, C442S286000, C442S287000, C442S290000, C442S370000, C442S394000, C442S395000, C442S398000

Reexamination Certificate

active

10808446

ABSTRACT:
The present invention provides an asymmetric porous PTFE membrane for clothing having little change over time and conventionally known properties of a porous PTFE molded article such as water permeability resistance, air permeability, sealing properties and electric properties, in which durability and water vapor permeability are improved by strengthening adhesion strength with fabric. Specifically, the present invention relates to an asymmetric porous PTFE membrane for clothing comprising a dense skin layer and a continuously foamed porous layer, wherein(1) the contact angle of water to the surface of the skin layer is 120 to 140°; and(2) the diffuse reflectance of light of the skin layer is 91 to 94%.

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Dictionary definition of “on” The American Heritage® Dictionary of the English Language, Fourth Edition Copyright © 2004, 2000 by Houghton Mifflin Company, no month.
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