Development of Fire Resistant/Heat Resistant Sewing Thread.

摘要

This report documents work carried out by Service Thread to show that domestic technology exists which would reduce base fiber costs, versus current Nomex and Kevlar type threads and the processes and costs associated with such threads. Multifilament polyester yarn was used as a core, treated and untreated. Modified acrylic fiber (Pyro-Tex) was used as the sheath. Core to sheath ratio was 50:50. The NeC 16/2 construction offered excellent physical properties. Modified acrylic fiber shed during processing and bi-component construction could not be dyed successfully to a solid, level Tan 499 shade. Finished thread sewed satisfactorily at high speeds; however, it shed severely during sewing trials, indicating fiber tenacity was too low for use in a sewing thread construction. It is expected that a polyester core treated with a flame retardant finish and wrapped with Nomex fiber, with a core to sheath ratio of 70:30 will offer a high performance, low cost sewing thread with required fire resistant/heat resistant properties.