Process for the preparation of uhmw multi-filament...

Details Process for the preparation of uhmw multi-filament... Process for the preparation of uhmw multi-filament...

D - Textiles, Paper

01

F

D01F 6/04 (2006.01)

Patent

CA 2660766

A process for preparing ultra-high molecular weight poly(alpha-olefin) (UHMWPO) multi-filament yarns having improved tensile properties at higher productivity. The process includes drawing a solution yarn, then drawing a gel yarn and then drawing a dry yarn continuously in sequence to form a partially oriented yarn, winding up the partially oriented yarn, unrolling the yarn, drawing the partially oriented yarn to form a highly oriented yarn, cooling the highly oriented yarn under tension and winding up the highly oriented yarn.

L'invention concerne un procédé pour préparer des fils à plusieurs filaments de poly(alpha-oléfine) à poids moléculaire ultra élevé (UHMWPO) présentant des propriétés de traction améliorées et une productivité supérieure. Le procédé comporte l'étirage d'un fil de solution, puis l'étirage d'un fil de gel et l'étirage d'un fil sec en continu à la suite pour former un fil partiellement orienté, l'enroulement du fil partiellement orienté, le déroulement du fil, l'étirage du fil partiellement orienté pour former un fil très orienté, le refroidissement du fil très orienté sous tension et l'enroulement du fil très orienté.

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