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.

1 . A fabric for an airbag, comprising:
 a polyethylene terephthalate fiber manufactured by spinning a polyethylene terephthalate chip having an intrinsic viscosity of 0.8 to 1.3 dl/g,   wherein the fabric for an airbag has a thermal resistance at 350° C. of 0.75 to 1.0 seconds, which is calculated by the following Equation:
   Thermal Resistance of Fabric (sec.)= T 1 −T 2  [Equation 1]
 
   where T1 is the time in which a steel rod heated to 350° C. falls from 10 cm above the fabric through the fabric, and T2 is the time in which the same steel rod falls from the same height.   
     
     
         2 . A fabric for an airbag, comprising:
 a polyethylene terephthalate fiber manufactured by spinning a polyethylene terephthalate chip having an intrinsic viscosity of 0.8 to 1.3 dl/g,   wherein the fabric for an airbag has a thermal resistance at 450° C. of 0.45 to 0.65 seconds, which is calculated by the following Equation:
   Thermal Resistance of Fabric (sec.)= T 3 −T 4  [Equation 1]
 
   where T3 is the time in which a steel rod heated at 450° C. falls from 10 cm above the fabric through the fabric, and T4 is the time in which the same steel rod falls from the same height.   
     
     
         3 . The fabric for an airbag according to  claim 1 , wherein the polyethylene terephthalate fiber has an instantaneous thermal strain rate of 1.0 to 5.0%. 
     
     
         4 . The fabric for an airbag according to  claim 1 , wherein the fabric for an airbag has a stiffness of 5.0 to 15.0 N. 
     
     
         5 . The fabric for an airbag according to  claim 1 , wherein the polyethylene terephthalate fiber has a strength of 8.0 to 11.0 g/d, and an elongation of 15 to 30% at room temperature. 
     
     
         6 . The fabric for an airbag according to  claim 1 , wherein the polyethylene terephthalate fiber has a filament size of 4.5 deniers or less. 
     
     
         7 . The fabric for an airbag according to  claim 2 , wherein the polyethylene terephthalate fiber has an instantaneous thermal strain rate of 1.0 to 5.0%. 
     
     
         8 . The fabric for an airbag according to  claim 2 , wherein the fabric for an airbag has a stiffness of 5.0 to 15.0 N. 
     
     
         9 . The fabric for an airbag according to  claim 2 , wherein the polyethylene terephthalate fiber has a strength of 8.0 to 11.0 g/d, and an elongation of 15 to 30% at room temperature. 
     
     
         10 . The fabric for an airbag according to  claim 2 , wherein the polyethylene terephthalate fiber has a filament size of 4.5 deniers or less.