HOLLOW FIBER POROUS MEMBRANE AND ITS MANUFACTURING METHOD

Japanese Patent JP2008168224

A

To provide a hollow fiber porous membrane small in contraction percentage of an inner diameter before and after making a membrane.

In the hollow fiber porous membrane having a semipermeable membrane layer formed from a solution for making the membrane on the interlace outside surface, the contraction percentage of the inner diameter before and after making the membrane represented by the following equation: contraction percentage (%)=(d1-d2)/d1100 [wherein d1 is an inner diameter before making the membrane (before making the semipermeable membrane layer) and d2 is an inner diameter after making the membrane (after making the semipermeable membrane layer)] is 25% or smaller.

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HAMADA TOYOZO

JP2007004686A

July 24, 2008

January 12, 2007

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DAICEL CHEM

B01D69/08; B01D63/02; B01D69/10; D04C1/06; D06M13/17; D06M13/272; D06M15/07

Satoshi Furuya
Takahiko Mizobe
Shinji Mochida
Yoshitsune Kazumasa

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