Method of manufacturing membranes and the resulting membranes

Details Method of manufacturing membranes and the resulting membranes Method of manufacturing membranes and the resulting membranes

2006-02-07

2006-02-07

Fortuna, Ana (Department: 1723)

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

C210S500270, C210S500360, C210S500420, C210S500230, C264S216000

Reexamination Certificate

active

06994811

ABSTRACT:
This invention provides a process for making microporous membranes from a polymer solution and the membranes therefrom. A thermal assist, such as heating of the polymer solution can be effected subsequent to shaping the solution, such as by forming a film, tube or hollow fiber of the solution under conditions that do not cause phase separation.. In a preferred embodiment, the formed solution is briefly heated to generate a temperature gradient through the body of the formed solution. The polymer in solution then is precipitated to form a microporous structure. The formation of a wide variety of symmetric and asymmetric structures can be obtained using this process. Higher temperatures and/or longer heating times effected during the heating step result in larger pore sizes and different pore gradients in the final membrane product.

REFERENCES:
patent: 4208848 (1980-06-01), Kohl
patent: 4340479 (1982-07-01), Pall
patent: 4629563 (1986-12-01), Wrasidlo
patent: 4666607 (1987-05-01), Josefiak et al.
patent: 4933081 (1990-06-01), Sasaki et al.
patent: 5013339 (1991-05-01), Mahoney et al.
patent: 5444097 (1995-08-01), Tkacik
patent: 5489406 (1996-02-01), Beck et al.
patent: 5514461 (1996-05-01), Meguro et al.
patent: 5626805 (1997-05-01), Meguro et al.
patent: 5698101 (1997-12-01), Kopp et al.
patent: 5834107 (1998-11-01), Wang et al.
patent: 5888434 (1999-03-01), Mahoney et al.
patent: 6013688 (2000-01-01), Pacheco et al.
patent: 6045899 (2000-04-01), Wang et al.
patent: 6218441 (2001-04-01), Meluch et al.
patent: 6497752 (2002-12-01), Kessler et al.

Affiliated with

Also associated with

Rating

Method of manufacturing membranes and the resulting 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 Method of manufacturing membranes and the resulting membranes, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of manufacturing membranes and the resulting membranes will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3694024