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Patent Searching and Data


Title:
COMPOSITE MICROPOROUS FILTRATION MEMBRANE
Document Type and Number:
Japanese Patent JPH06218253
Kind Code:
A
Abstract:

PURPOSE: To obtain an integrated composite membrane having good structural maintainability and a high bubbling point, and reusable by washing by forming an asymmetric polysulfone ultrafiltration membrane integratedly with a preformed non-fibrous microporous membrane made from a specified base- resistant polymer on the microporous membrane.

CONSTITUTION: This composite ultrafiltration membrane comprises a microporous base-resistant membrane support made of a microporous non-fibrous polyolefin or sulfone polymer and an ultrafiltration layer combined to the support and covered with a skin made of sulfone polymer as a multilayer composite produced by applying a sulfone polymer solution to the support of the microporous polyolefin or sulfone polymer by uniformly controlled thickness and then depositing the sulfone polymer to form the porous ultrafiltration layer. As a result, this membrane is resistant to the deterioration caused by contact with strong alkali and reusable by washing.


Inventors:
EREN SHII BERANTOONI
ROBAATO ESU ROIA
Application Number:
JP29760293A
Publication Date:
August 09, 1994
Filing Date:
November 04, 1993
Export Citation:
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Assignee:
MILLIPORE CORP
International Classes:
B01D71/26; B01D69/12; B01D71/68; (IPC1-7): B01D71/26; B01D71/68
Attorney, Agent or Firm:
Motohiro Kurauchi (1 outside)