Methods for the preparation of porous fibers and membranes

Details Methods for the preparation of porous fibers and membranes Methods for the preparation of porous fibers and membranes

1983-01-10

1986-01-14

Anderson, Philip

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

2105002, 264 49, 264129, 264178F, 2642091, B29C 6720, B29C 4700, C08J 926

Patent

active

045644888

ABSTRACT:
The invention concerns porous fibers and membranes, methods for their preparation and for their use. The fibers are characterized by a smooth porous surface and an apparent density of between about 10 and 90% of the true density of the polymeric starting material employed. The process involves the formation of a homogeneous mixture of at least two components, one of which is a meltable polymer and another liquid inert with respect to the polymer. The mixture formed must be of a binary type, in which there is a temperature range of complete miscibility and a range in which there is a miscibility gap. The mixture is extruded at a temperature above the separation temperature into a bath containing at least some of the inert liquid which is at a temperature below the separation temperature. Upon introduction of the mixture into the bath, the fiber structure of the product is fixed.

REFERENCES:
patent: T1860002 (1969-03-01), McFarren
patent: 2585444 (1952-02-01), Coxe
patent: 2585449 (1952-02-01), Rothrock
patent: 3443002 (1969-05-01), Murao et al.
patent: 3527804 (1970-09-01), Cyba
patent: 3536796 (1970-10-01), Rock
patent: 3716328 (1973-02-01), Mayer
patent: 3755209 (1973-08-01), Nintz et al.
patent: 3922249 (1975-11-01), Mills
patent: 4115492 (1978-09-01), Mahoney et al.
patent: 4247498 (1981-01-01), Castro

Affiliated with

Also associated with

Rating

Methods for the preparation of porous fibers and membranes does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Methods for the preparation of porous fibers and membranes, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Methods for the preparation of porous fibers and membranes will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-429914