POLYAMIDE 56 FILAMENT, AND FIBER STRUCTURE AND AIR-BAG BASE CLOTH EACH COMPRISING THE SAME

摘要

Disclosed is a polyamide filament which can form an excellent air-bag base cloth having superior flexibility and impact-absorbing properties to those of air-bag base cloths comprising conventional polyamide 66 filaments and also having a good balance among low air permeability, high strength, heat resistance and durability. Also disclosed are a fiber structure and an air-bag base cloth each comprising the filament. The polyamide 56 filament has a sulfuric acid relative viscosity of 3 to 8, a Mw/Mn ratio of 1.5 to 3, a single fiber fineness of 0.1 to 5 dtex, a strength of 7 to 12 cN/dtex, a shrinkage rate of 5 to 20% as measured after the treatment in boiled water at 98°C for 30 minutes, a strength of 5 to 11 cN/dtex as measured after the treatment in boiling water, and a stress at 10% elongation of 0.3 to 1.5 cN/dtex as measured after the treatment in boiling water.