Stock material or miscellaneous articles – Web or sheet containing structurally defined element or... – Composite having voids in a component
Patent
1992-12-02
1994-07-12
Ryan, Patrick J.
Stock material or miscellaneous articles
Web or sheet containing structurally defined element or...
Composite having voids in a component
428195, 428213, 4283157, 4283159, 428409, 264145, 2642902, B32B 900
Patent
active
053287606
ABSTRACT:
The process for forming a microporous polymeric semi-crystalline film, involving the steps of cold compressive extruding a precursor film, preferably in a biaxial fashion, so as to compress the film by a factor of about 2 to 1 to about 10 to 1, stretching the film by about 100 to about 500 percent, preferably in a biaxial fashion, and heat annealing either before, during, or preferably after the stretching step at a temperature up to the alpha transition temperature of the polymer for a time sufficient to maintain the microporous character of the final film.
REFERENCES:
patent: 3083410 (1956-11-01), McGlamery
patent: 3679538 (1972-07-01), Druin et al.
patent: 3679540 (1972-07-01), Zimmerman
patent: 3725520 (1973-04-01), Suzuki et al.
patent: 3843761 (1974-10-01), Bierenbaum et al.
patent: 3903234 (1925-09-01), Ikeda et al.
patent: 4346142 (1982-08-01), Lazear
patent: 4620956 (1986-11-01), Hamer
patent: 4620956 (1986-11-01), Hamer
patent: 4726989 (1988-02-01), Mrozinski
patent: 4833026 (1989-05-01), Kausch
patent: 4867881 (1989-09-01), Kinzer
patent: 5049347 (1991-09-01), Magill et al.
patent: 5120594 (1992-06-01), Mrozinski
Bahta Abraham
Hoechst Celanese Corp.
Mazzarese Joseph M.
Ryan Patrick J.
LandOfFree
Microporous membrane from cold-rolled precusor film does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Microporous membrane from cold-rolled precusor film, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Microporous membrane from cold-rolled precusor film will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-395073