Title:
MANUFACTURE OF HOLLOW YARN MEMBRANE
Document Type and Number:
Japanese Patent JP3473202
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To eliminate the generation of running-out of yarns during spinning and manufacture a hollow yarn membrane of good performance and quality by using a deaerated injection liquid when the hollow yarn membrane is spun.
SOLUTION: When a hollow yarn membrane is manufactured by using an annular spinneret in the wet process or the dry wet process, an injection liquid of low coagulating properties is injected into a central pipe of the annular spinneret, and a deaerated injection liquid is used therein. As a deaeration process, a process of heating the injection liquid to the temperature higher than the room temperature or the like is adopted. When the hollow yarn membrane is manufactured as above-mentioned, the generation of running-out of yarns during spinning is almost eliminated, and the stabilized spinning can be carried out for a long time to improve workability and productivity and also improve the performance and quality of the hollow yarn membrane.
Inventors:
Ken Noyori
Yoshinari Fujii
Hidetsugu Iwatani
Yoshinari Fujii
Hidetsugu Iwatani
Application Number:
JP20974095A
Publication Date:
December 02, 2003
Filing Date:
August 17, 1995
Export Citation:
Assignee:
Toray Industries, Inc.
International Classes:
B01D69/08; D01D5/06; D01D5/24; (IPC1-7): B01D69/08
Domestic Patent References:
| JP796152A | ||||
| JP7155744A | ||||
| JP59202040A | ||||
| JP5184811A | ||||
| JP680205B2 |