Patent · US Expired

Monofils and bristles of homopolymers or copolymers of acrylonitrile, and a process for their manufacture

US4719150A · kind A · utility

3Cited by

6References

5Claims

0Family size

Assignee

Hoechst GmbH · DE

Inventors

Bernd Huber · Schorndorf, DE
Walter Fester · Königstein, DE

Key dates

Filing date	Feb 7, 1986
Grant date	Jan 12, 1988
Priority date	—
Expiry date	Feb 7, 2006

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T428/2973
WIPO fieldTextile and paper machines
WIPO sectorMechanical engineering

Abstract

Monofils and bristles which comprise at least 90% by weight of acrylonitrile units and have a linear density of more than 2.5 tex possess a relative solution viscosity of 1.7 to 6.0, a tear strength of at least 20 cN/tex and an initial modulus of more than 700 cN/tex. The manufacturing process is distinguished by a wet stretch of the spun filaments by at least 1:4, drying under tension and a subsequent hot stretch of at least 1:2, the overall stretch being at least 1:8, preferably 1:10 to 1:20. The monofils and bristles according to the invention are suitable in particular for producing filament-reinforced composite materials.

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