Title:
POLYPROPYLENE FIBER AND CONJUGATE FIBER
Document Type and Number:
Japanese Patent JP2537313
Kind Code:
B2
Abstract:
PURPOSE: To provide the subject fiber useful for rope, short fibers for cement- reinforcement, conjugate yarn, etc., composed of a high-tenacity yarn having specific breakage strength, producible at a low cost and consisting of a specific drawn polypropylene yarn having high crystallinity.
CONSTITUTION: The objective fiber having a breakage strength of ≥8g/de (preferably ≥9g/de) and a fineness (d) of 0.5<d<100 is produced by using a highly crystalline polypropylene having Q value (ratio of weight-average molecular weight to number-average molecular weight) of <5 (preferably ≤4.5), a boiling n-heptane insoluble fraction (H≥ wt.%) of 97<HI<100 (preferably 98<HI) and an isotactic pentad fraction (IPF mol%) of 94<IPF<100 (preferably 96≤IPF) and drawing the polypropylene e.g. by dry-drawing process at a high temperature not to cause the welding of the constituent components.
Inventors:
TAKAI YOSUKE
Application Number:
JP16191891A
Publication Date:
September 25, 1996
Filing Date:
July 02, 1991
Export Citation:
Assignee:
DAIWA SPINNING CO LTD
International Classes:
D01D5/34; D01F6/06; D01F8/06; (IPC1-7): D01F6/06; D01D5/34; D01F8/06
Domestic Patent References:
| JP6059113A | ||||
| JP63303160A | ||||
| JP55481B2 | ||||
| JP5314649B2 |
Attorney, Agent or Firm:
Hiroyuki Ikeuchi (1 person outside)