Process for making high-performance polyethylene multifilament yarn

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United States of America

PATENT NO 10557689
APP PUB NO 20190212098A1
SERIAL NO

16353957

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Abstract

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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.

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Patent Owner(s)

Patent OwnerAddress
DSM IP ASSETS B VHET OVERLOON 1 HEERLEN 6411 TE

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Jacobs, Martinus Johannes Nicolaas Heerlen, NL 18 61
Marissen, Roeloef Born, NL 9 22
Mencke, Jacobus Johannes Maastricht, NL 16 59
Simmelink, Joseph Arnold Paul Maria Sittard, NL 28 113

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