EP0183256A2
Expired / Lapsed
EP
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Method of producing a hollow fiber semipermeable membrane element and a hollow fiber semipermeable membrane element
Assignee: Asahi Kasei Corp
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Filing: 1985-11-28
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Granted: —
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Expires: 2005-11-28
Abstract
Abstract There is disclosed a hollow fiber semipermeable membrane element comprising hollow fiber semipermeable membranes having their respective one end portions or both end portions bonded together by means of a vulcanized rubber, so that the semipermeable membrane element has a high resistance to chemicals. The incorporation of a graphite fluoride in the rubber serves to further increase not only the hardness of the bonding rubber portions but also the resistance of the bonding rubber portions to chemicals. Such a semipermeable element can be easily, efficiently produced on a commercial scale.
Inventors
- 👤 Takayuki Yokoyama
- 👤 Takashi Ogawa
- 👤 Nobuatsu Watanabe
- 👤 Kazuo Toyomoto
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-03 18:55
CPC Classifications
B; B01; B01D; B01D63/00; B01D63/02; B01D63/021; B01D63/022; B01D63/0223; B01D63/023; B29; B29C; B29C70/00; B29C70/68; B29C70/84; B29C70/845; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2929; Y10T428/2933; Y10T428/2935; Y10T428/294; Y10T428/296; Y10T428/2964; Y10T428/2967; Y10T428/2973; Y10T428/2975
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
43 words
A hollow fiber semipermeable membrane element comprising a vast plurality of hollow fiber semipermeable membranes substantially equal in length, arranged in a lengthwise direction and bonded together by means of a vulcanized rubber at their respective one end portions or both end portions.
Claim 2
Dependent Claim
43 words
A hollow fiber semipermeable membrane element comprising a vast plurality of hollow fiber semipermeable membranes substantially equal in length, arranged in a lengthwise direction and bonded together by means of a vulcanized rubber at their respective one end portions or both end portions.
Claim 3
Dependent Claim
40 words
A hollow fiber semipermeable membrane element according to claim 1, wherein said vulcanized rubber contains a graphite fluoride in an amount of 1 to 100 % by weight based on the weight of the rubber value of said vulcanized rubber.
Claim 4
Independent Claim
94 words
A method of producing a hollow fiber semipermeable membrane element which comprises the steps of (1) coating the peripheral surfaces of a vast plurality of hollow fiber semipermeable membranes at their respective one end portions or both end portions with an unvulcanized rubber containing a vulcanizing agent, (2) arranging said semipermeable membranes into a bundle, and (3) subjecting said bundle to vulcanization of the unvulcanized rubber while pressing the hollow fiber semipermeable membranes at their coated end portions, thereby bonding the end portions of said semipermeable membranes together by means of the vulcanized rubber.
Claim 5
Independent Claim
94 words
A method of producing a hollow fiber semipermeable membrane element which comprises the steps of (1) coating the peripheral surfaces of a vast plurality of hollow fiber semipermeable membranes at their respective one end portions or both end portions with an unvulcanized rubber containing a vulcanizing agent, (2) arranging said semipermeable membranes into a bundle, and (3) subjecting said bundle to vulcanization of the unvulcanized rubber while pressing the hollow fiber semipermeable membranes at their coated end portions, thereby bonding the end portions of said semipermeable membranes together by means of the vulcanized rubber.
Claim 6
Dependent Claim
95 words
A method according to claim 3, wherein in the step (1), said vast plurality of hollow fiber semipermeable membranes are arranged substantially in parallel at predetermined intervals and the coating is effected so as to bridge the arranged membranes to form a sheet composed of hollow fiber semipermeable membranes with their end portions bonded together by means of the unvulcanized rubber containing the vulcanizing agent and, in the step (2), said sheet is rolled in a direction perpendicular to the lengthwise direction of the membranes to form a bundle of the hollow fiber semipermeable membranes.
References Cited (Backward Citations)
No citation records indexed.
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