Antistatic woven coated polypropylene fabric
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United States of America Patent
Stats
-
Dec 10, 1991
Grant Date -
N/A
app pub date -
Feb 7, 1991
filing date -
Feb 7, 1991
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
The present invention provides for an anti-static flexible fabric material formed from woven, axially oriented crystalline polypropylene yarn, said fabric further characterized as having a coating of a flexible, thermoplastic polymer on one or both sides of the fabric. Anti-static properties are imparted to the fabric by formulating the thermoplastic coating to contain from about 0.2 to about 8% by weight of a polyol ester (preferably glycerol) of a C.sub.10 to C.sub.28 fatty acid. The polypropylene yarn may optionally itself also contain a lesser amount of the polyol ester of a C.sub.10 to C.sub.28 fatty acid to provide a fabric having even more enhanced anti-static properties. In another embodiment, the polypropylene yarn may additionally have interwoven therewith or in contact therewith at intervals conductive yarns to provide even more enhanced anti-static properties. A particular advantage of the fabrics of the present invention is that containers constructed therefrom need not be grounded during filling and emptying operations. As static charges are generated, the electrons can flow across the fabric and dissipate or bleed into the atmosphere almost immediately.
First Claim
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International Classification(s)
Cited Art Landscape
Patent Citation Ranking
- 45 Citation Count
- B32B Class
- 0 % this patent is cited more than
- 34 Age