IMPROVEMENT OF TEAR RESISTANCE OF COATED FABRICS.
Abstract
A series of 2-oz/yd(squared), plain weave, nylon fabrics of varying thread count, impregnated with varying amounts of two standard primer-adhesive compounds has been mechanically tested to determine the effect of fabric construction and primer compound variables on tear strength retention of coated fabrics. The two primer systems selected for investigation exhibit widely different stress-strain properties. Impregnation with either primer compound had no adverse effect upon the breaking strength of the fabrics. Loss of tear strength of the fabrics after primer treatment ranged from 0 to 30 percent. Primer modulus and amount of primer incorporated on the fabrics appeared to be the most important factors related to the degree of tear strength retention of the treated fabrics. These factors were reflected in the strength of bond between yarns in the fabric developed by the primer compound. This property, quantitatively determined by means of a yarn pullout test developed for this purpose, is evidently a good measure of the restraining force that tends to immobilize the yarns in the primer-impregnated fabric. Fabric thread count and adhesion of primer compound to the fabric did not appear to be important factors affecting tear strength retention. Preliminary results suggest that degree of yarn twist may be of significance in this respect. The results obtained indicate that impregnation of the fabrics with 6 to 8 wt percent by weight of fabric of a low-modulus high-elongation primer compound should have no adverse effect upon fabric tear strength. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 01, 1966
- Accession Number
- AD0803269
Entities
People
- Bruce S. Fisher
Organizations
- Melpar