多孔質中空糸膜の製造方法および紡糸装置

Japanese Patent JP5741871

B2

The purpose of the present invention is to control cracking of a porous hollow yarn membrane, even one produced under a high spinning speed. The method for producing a porous hollow yarn membrane of the present invention comprises a spinning and coagulation step wherein the membrane-producing liquor branches into multiple currents that merge back together; the membrane-producing liquid that has formed multiple merging sites is fed to a spinning nozzle (10); inside the spinning nozzle (10) the membrane-producing liquor branches, merges annularly, and then is extruded annularly; and the membrane-producing liquor is coagulated with a coagulating bath. The ratio (t/T) of the time t found by the formula t = V/Q (where V is the volume (cm3) of the liquor flow path, from the point where the first merging site is formed in the membrane-forming liquor to the point where the membrane-forming liquor that has branched merges inside the spinning nozzle, and Q is the amount extruded per time (cm3/second) of membrane-forming liquor from the spinning nozzle (10)) and the viscoelastic relaxation time T of the membrane-forming liquor is less than 1. Moreover, spinning device (1) is used for the production method.

Hiroyuki Fujiki
Toshinori Sumi
Hiroo Yasuo
Masakazu Minagawa

JP2013514423A

July 01, 2015

March 15, 2013

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Mitsubishi Rayon Co., Ltd.

B01D69/08; B01D71/34; D01D5/24

JP2012040461A
JP2010227932A
JP8108052A
JP6319967A
JP2005163240A
JP2007126783A
JP10072727A
JP10323546A
JP2002242020A
JP5192985A

Masatake Shiga
Tadashi Takahashi
Suzuki Mitsuyoshi

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