Joseph Arnold Paul Maria SIMMELINK,Jacobus Johannes MENCKE,Martinus Johannes Nicolaas JACOBS,Roeloef MARISSEN
申请号：
US15672190
公开号：
US20170370681A1
申请日:
2017.08.08
申请国别(地区):
US
年份:
2017
代理人:
摘要：
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.
