Method and apparatus for producing high modulus bixial fabric

Details Method and apparatus for producing high modulus bixial fabric Method and apparatus for producing high modulus bixial fabric

1974-06-10

1976-03-23

Rimrodt, Louis K.

Textiles: cloth finishing

Ornamental

By fiber removal

81155, 68 5D, D06C 300

Patent

active

039450937

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.

REFERENCES:
patent: 2824383 (1958-02-01), Machalek
patent: 2884015 (1959-04-01), Bechter
patent: 3243845 (1966-04-01), Cassel
patent: 3474509 (1969-10-01), Bray
patent: 3517425 (1970-06-01), Hunter
patent: 3803672 (1974-04-01), McGuffin et al.

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