Patent · US Expired

Method and apparatus for producing high modulus bixial fabric

US3945093A · kind A · utility

7Cited by
6References
10Claims
0Family size

Assignee

Inventors

Key dates

Filing dateJun 10, 1974
Grant dateMar 23, 1976
Priority date—
Expiry dateJun 10, 1994

Classification

  • Technology area (CPC D)Textiles; Paper
  • CPC primaryD06C3/00
  • WIPO fieldChemical engineering
  • WIPO sectorChemistry

Abstract

The transverse properties of high modulus fabric such as graphite are significantly improved by continuously processing the material through a multiple roller unit under warp tension while restraining fill shrinkage by wrapping the material no less than 180.degree. around each roll and by minimizing unrestrained inter-roll travel by controlling the inter-roll span. Graphite precursor fabrics such as polyacrylonitrile (PAN) can be stretched as high as 45% in the warp direction with as little as 1-2% shrinkage in the fill direction. The invention also relates to simultaneous stretching and preoxidation of the precursor fabric under tension and while minimizing fill shrinkage.

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