JPS5630441A - Production of microporous membrane - Google Patents

Production of microporous membrane

Info

Publication number
JPS5630441A
JPS5630441A JP10745579A JP10745579A JPS5630441A JP S5630441 A JPS5630441 A JP S5630441A JP 10745579 A JP10745579 A JP 10745579A JP 10745579 A JP10745579 A JP 10745579A JP S5630441 A JPS5630441 A JP S5630441A
Authority
JP
Japan
Prior art keywords
membrane
polymer
solvent
forming
islands
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP10745579A
Other languages
Japanese (ja)
Other versions
JPS6139978B2 (en
Inventor
Takeji Otani
Akio Tateishi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Rayon Co Ltd
Original Assignee
Mitsubishi Rayon Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mitsubishi Rayon Co Ltd filed Critical Mitsubishi Rayon Co Ltd
Priority to JP10745579A priority Critical patent/JPS5630441A/en
Publication of JPS5630441A publication Critical patent/JPS5630441A/en
Publication of JPS6139978B2 publication Critical patent/JPS6139978B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Separation Using Semi-Permeable Membranes (AREA)
  • Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)

Abstract

PURPOSE: To obtain a porous membrane having uniform pores and excellent mechanical properties, by forming a membrane from a mixture prepared by mixing two polymers incompatible with each other in the presence of a specific dispersant, and then selectively extracting one polymer from the membrane with a specific solvent.
CONSTITUTION: A sea-island type dope in which islands of (B) herein-blow described are dispersed in the matrix of polymer (A) herein-below described is prepared by mixing (I) polymers (A) and (B) incompatible with each other in the presence of 0.05W20wt%, based on component (I), of a dispersant comprising a block copolymer in which at least one block component has affinity for polymer (A) and at least one different block component has affinity for polymer (B) and, optionally, in the presence of (II) a solvent. Then, titled membrane is obtained by forming the dops into a membrane, for example, by a conventional inflation method, and then, extracting islands of (B) with a solvent which selectively dissolves polymer (B).
EFFECT: Stability in membrane-forming process is good, and easy control of porosity is possible.
COPYRIGHT: (C)1981,JPO&Japio
JP10745579A 1979-08-22 1979-08-22 Production of microporous membrane Granted JPS5630441A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10745579A JPS5630441A (en) 1979-08-22 1979-08-22 Production of microporous membrane

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10745579A JPS5630441A (en) 1979-08-22 1979-08-22 Production of microporous membrane

Publications (2)

Publication Number Publication Date
JPS5630441A true JPS5630441A (en) 1981-03-27
JPS6139978B2 JPS6139978B2 (en) 1986-09-06

Family

ID=14459594

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10745579A Granted JPS5630441A (en) 1979-08-22 1979-08-22 Production of microporous membrane

Country Status (1)

Country Link
JP (1) JPS5630441A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0510156A (en) * 1991-06-28 1993-01-19 Kubota Corp Overrun preventer of positive crankcase ventilation type diesel engine

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS539632A (en) * 1976-07-14 1978-01-28 Sugiyama Kk Paper napkin manufacturing device

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS539632A (en) * 1976-07-14 1978-01-28 Sugiyama Kk Paper napkin manufacturing device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0510156A (en) * 1991-06-28 1993-01-19 Kubota Corp Overrun preventer of positive crankcase ventilation type diesel engine

Also Published As

Publication number Publication date
JPS6139978B2 (en) 1986-09-06

Similar Documents

Publication Publication Date Title
JPS5657836A (en) Porous hydrophilic polyolefin resin membrane and its preparation
JPS5471785A (en) Selectively permeable membrane and production thereof
JPS52137026A (en) Microporous hollow fibers and their production
EP0370259A3 (en) Process for the preparation of porous polymer beads
WO1999032204A3 (en) Permeable compositions and methods for their preparation
GB1295585A (en)
CA2024372A1 (en) Highly air permeable expanded polytetrafluoroethylene membranes and process for making them
ES2064417T3 (en) POROUS POLYMER BLOCKS AND PROCEDURE.
JPS5254688A (en) Method of producing semipermeable memebrane
ES8107038A1 (en) Anisotropic membranes
JPS55106243A (en) Preparation of microporous polymer membrane
JPS5560537A (en) Preparation of porous membrane
JPS5330989A (en) Semipermeable membrane and its preparation
JPS5631405A (en) Selective perameable membrane
JPS5630441A (en) Production of microporous membrane
JPS5686941A (en) Porous membrane of polysulfone resin
JPS52152877A (en) Membrane of ethylene-vinyl alcohol copolymer having excellent permeability and its production method
JPS5535969A (en) Ethylene-vinyl alcohol copolymer membrane and its manufacture
JPS55152501A (en) Cellulose ester-based selectively permeable membrane and its preparation
JPS5611931A (en) Porous membrane of polyvinyl alcohol
JPS5742740A (en) Production of porous membrane
JPS5691815A (en) Manufacture of ultrafiltration film
JPS5790028A (en) Production of microporous sheet
JPS52123385A (en) Polyvinyl alcohol membrane of selective permeability and its production
JPS5750508A (en) Permselective membrane and its production