B - Operations – Transporting – 01 – D
Patent
B - Operations, Transporting
01
D
B01D 71/36 (2006.01) B01D 67/00 (2006.01) B29C 55/00 (2006.01) B29C 55/18 (2006.01) B29C 67/20 (2006.01)
Patent
CA 2265433
The present invention relates to microporous and ultrafine polytetrafluoroethylene (PTFE) membranes of high permeability, excellent mechanical strength, and good chemical inertness, and to methods for their preparation. According to the method of the present invention, a porous PTFE substrate having a first pore rating is compressed to provide a porous membrane having a second pore rating, wherein the second pore rating is smaller than the first pore rating. The PTFE substrate can be contacted with one or more fibrous sheets during the compression step, which is preferably performed by passing the substrate, and fibrous sheets, if appropriate, between two calender rolls. The resulting porous PTFE membrane then can optionally be stretched and/or sintered, and preferably has a water permeability of at least about 0.5 1/hr/m2/kPa.
Kidd Stanley
Morizio Franco
Newman David E.
Marks & Clerk
Pall Corporation
LandOfFree
Porous polytetrafluoroethylene membrane does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Porous polytetrafluoroethylene membrane, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Porous polytetrafluoroethylene membrane will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-2063051