Title:
POLYVINYLIDENE FLUORIDE MEMBRANE
Document Type and Number:
Japanese Patent JP3178772
Kind Code:
B2
Abstract:
PURPOSE: To prepare a filter membrane capable of removing small particles from a liquid effectively, having the smallest absorptivity and capable of testing its perfection before actual usage, and provide a process for manufacturing the same.
CONSTITUTION: This polyvinylidene fluoride membrane is a homogeneous, skinless and porous membrane having a KUF of at least about 15 psi (103 kPa) when tested by using liquid pairs having an interfacial tension of about 4 dyne/cm (4 mN/m). The membrane is manufactured by preparing a casting solution comprising polyvinylidene fluoride and its solvent, heating the casting solution to a uniform temperature of about 57 to 60°C, forming a film by spreading the casting solution onto a support, quenching the film in a quench bath so as to form a porous membrane, and washing and drying the membrane.
Inventors:
Peter Jay Degen
Kenten, Jiyoung, Henry
Gregory Sea Lapisada
Joseph Greg
Kenten, Jiyoung, Henry
Gregory Sea Lapisada
Joseph Greg
Application Number:
JP33615794A
Publication Date:
June 25, 2001
Filing Date:
December 22, 1994
Export Citation:
Assignee:
Pall Corporation
International Classes:
A61M1/16; B01D61/14; B01D63/00; B01D63/06; B01D63/14; B01D67/00; B01D69/02; B01D69/10; B01D69/12; B01D71/34; C08F259/08; C08J7/00; C08J7/04; C08J7/18; C08J9/42; (IPC1-7): B01D71/34
Domestic Patent References:
| JP5209071A | ||||
| JP3186325A | ||||
| JP3114517A | ||||
| JP7148425A |
Other References:
【文献】米国特許4340479(US,A)
【文献】国際公開93/22034(WO,A1)
【文献】国際公開93/22034(WO,A1)
Attorney, Agent or Firm:
Yoshiki Hasegawa (6 others)