Fabric for air-bag, using polyethylene terephthalate with excellent heat resistance

Abstract

Provided is a fabric for an airbag using a polyethylene terephthalate fiber, and particularly, to a fabric for an airbag having enhanced thermal resistance and instantaneous thermal strain rate, which is manufactured using a polyethylene terephthalate fiber for an airbag manufactured by controlling the strength and elongation of the polyethylene terephthalate fiber to replace a conventional fabric for an airbag using a yarn formed of nylon 66. The fabric for an airbag including a polyethylene terephthalate fiber manufactured by spinning a polyethylene terephthalate chip having an intrinsic viscosity of 0.8 to 1.3 dl / g has thermal resistances of 0.45 to 0.65 seconds at 450° C., and 0.75 to 1.0 seconds at 350° C.

Description

TECHNICAL FIELD[0001]The present invention relates to a fabric for an airbag using a polyethylene terephthalate fiber, and particularly, to a fabric for an airbag having enhanced thermal resistance and instantaneous thermal strain rate, which is manufactured using a polyethylene terephthalate fiber for an airbag manufactured by controlling the strength and elongation of the polyethylene terephthalate fiber to replace a conventional fabric for an airbag using a yarn formed of nylon 66.BACKGROUND ART[0002]An airbag requires characteristics of low air permeability to easily rupture in a car crash, and energy absorbability to prevent damage to and bursting of the airbag itself. In addition, to be more easily stored, characteristics relating to foldability of a fabric itself are required. As a suitable fiber having the above-described characteristics, nylon 66 has generally been used. However, recently, in order to save on cost, attention on fibers other than nylon 66 has been increasing...

AI Technical Summary

Benefits of technology

The present invention provides a polyethylene terephthalate fabric for an airbag that has better thermal resistance and flexibility compared to conventional fabrics. This makes it easier to store and prevents bursting during airbag development tests. The fabric is manufactured by controlling strength and elongation of polyethylene terephthalate fibers, which improves foldability and storability of the fabric. The fabric can safely absorb impact energy generated during airbag explosion and has superior mechanical properties. The polyethylene terephthalate fiber for an airbag should have a strength of at least 8.0 g / d and elongation of 15-30% at room temperature for suitable use in the fabric.

Problems solved by technology

However, when polyethylene terephthalate is used as a yarn for an airbag, seams rupture during airbag cushion module tests.