Patent · US Expired

Process for the high-speed spinning of monofilaments

US5266254A · kind A · utility

0Cited by

9References

4Claims

0Family size

Assignee

Rhone-Poulenc Viscosuisse SA · CH

Inventors

Klaus Fischer · Speyer, DE
Halim Baris · Luzern, CH

Key dates

Filing date	Sep 16, 1991
Grant date	Nov 30, 1993
Priority date	—
Expiry date	Sep 16, 2011

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T428/298
WIPO fieldTextile and paper machines
WIPO sectorMechanical engineering

Abstract

A process of high-speed spinning of a set of thermoplastic monofilaments having a linear density from 1 to 30 dtex, includes spinning to obtain melt-spun thermoplastic monofilaments and airblast cooling of the melt-spun monofilaments. To produce a particularly fine monofilament at high winding speeds, the process also includes guiding the thermoplastic monofilaments directly over a fork-like friction element having axially parallel, spaced apart upper and lower contacting friction surfaces during the airblast cooling, and then spin finishing and winding up the thermoplastic monofilaments. An apparatus for melt-spinning including the friction element is described. The product monofilament produced by the process can have an elongation of 20 to 45%, a strength of 36 to 60 cN/tex; a boil shrinkage of 2 to 15%; an Uster % less than 1 and a uniformly round cross section.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.