高性能ポリエチレン・マルチフィラメント糸の製造方法

Japanese Patent JP4613176

B2

Processes for making high-performance polyethylene multi-filament yarn are disclosed which include the steps of a) making a solution of ultra-high molar mass polyethylene in a solvent; b) spinning of the solution through a spinplate containing at least 5 spinholes into an air-gap to form fluid filaments, while applying a draw ratio DRfluid; c) cooling the fluid filaments to form solvent-containing gel filaments; d) removing at least partly the solvent from the filaments; and e) drawing the filaments in at least one step before, during and/or after said solvent removing, while applying a draw ratio DRsolid of at least 4, wherein in step b) each spinhole comprises a contraction zone of specific dimension and a downstream zone of diameter Dn and length Dn with Ln/Dn of from 0 to at most 25, to result in a draw ratio DRfluid=DRsp*DRag of at least 150, wherein DRsp is the draw ratio in the spinholes and DRag is the draw ratio in the air-gap, with DRsp being greater than 1 and DRag at least 1. High-performance polyethylene multifilament yarn, and semi-finished or end-use products containing said yarn, especially to ropes and ballistic-resistant composites, are also disclosed.

Symlink, joseph, arnold, paul, maria
Menke, Jacobs, Johannes
Marissen, Roelov
Jacobs, Martinas, Joanne, Nicholas

JP2006546871A

January 12, 2011

December 23, 2004

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DSM IP ASSETS B.V.

D01F6/04; A61L17/00; A61L17/04; A61L17/10; A61L27/16; D01D4/02; D02J1/22; F41H1/02; F41H5/04

JP2003528994A
JP5106107A
JP58005228A
JP3119105A
JP56063004A
JP7189013A
JP2007517992A

WO1994012703A1

Yuichi Yamada
Masakazu Noda
Yoshinori Shimizu

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