Polyester fabric and method for manufacturing same
The present invention relates to a fabric for an airbag which includes polyester fiber, and particularly, to a polyester fabric, the heat resistant constant (x) of which is 1.0 to 6.5 in an uncoated fabric state, to a method for manufacturing the polyester fabric, and to an automotive airbag including the polyester fabric. The fabric of the present invention for an airbag provides good mechanical properties such as high tenacity and high heat resistance, and excellent storability, shape stability and air blocking ability by using a polyester yarn having a low modulus, high strength and high elongation, and minimizes impacts applied to a passenger, thereby enabling the passenger to be safely protected. 1. A polyester fabric, when the polyester fabric when uncoated, the polyester fabric is formed by the following calculating formula 1 defined heat-resisting constant (X) is 1.0-6.5: [Formula 1] Heat-resisting constant (X) = (T×t) / (600 ×D) Wherein T is the crucible 350-750 °C in the range of the temperature of the in the course of the free falling body; is t crucible from the contact point of the polyester fabric through the polyester fabric as the time (sec); the polyester is D (mm) the thickness of the fabric. 2. Polyester fabric according to Claim 1, wherein the temperature of the when the states the hot pole (T) is the 450 when [...] , by calculating formula 1 defined heat-resisting constant (X) is 1.20-3.5; states the hot pole when the temperature (T) is the 600 when [...] , by calculating formula 1 defined heat-resisting constant (X) is 1.0-2.0. 3. Polyester fabric according to Claim 1, wherein said polyester fabric includes forming on the upper surface of the coating of the rubber composition, the coated polyester fabric is heat-resistant constant of 2.8-17.0. 4. Polyester fabric according to Claim 3, wherein the temperature of the when the states the hot pole (T) is the 450 when [...] , the coating polyester fabric is heat-resistant constant of 3.3-10.0; states the hot pole when the temperature (T) is the 600 when [...] , the coating polyester fabric is heat-resistant constant of 3.0-7.0. 5. Polyester fabric according to Claim 1, wherein the fineness of the polyester fabric includes is 400-650 denier polyester fiber. 6. Polyester fabric according to Claim 1, wherein tensile strength of the polyester fabric includes at least is 8.8g/de, the elongation at break is 14-23%, dry shrinkage is 1.0-6.5% (ΔH) is heat capacity and melting 40-65J/g polyester fiber. 7. Polyester fabric according to Claim 1, wherein the characteristic of the polyester fabric includes viscosity is 1.05-2.0dl/g made of polyester fiber polyester chip. 8. Polyester fabric according to Claim 3, wherein the rubber component comprises is selected from powdered silicon rubber, liquid silicone rubber, polyurethane, chloroprene, neoprene and silicone resin in the emulsion at least one. 9. Polyester fabric according to Claim 3, wherein the rubber component per unit area of the coating weight is 20-200g/m2. 10. A preparation of any one of the method of the polyester fabric according to Claim 1-9, including: The polyester fibers used for weaving a fabric is hinged of the airbag; Wash the above-mentioned for air bag fabric is hinged; and To the above-mentioned washing the fabric in the tentering. 11. Method according to Claim 10, wherein the step to states pulls 140-210 the vulcanizing temperature [...]. 12. According to claim a 1-9 any one in the polyester fabric air bag for a motor vehicle. 13. Air bag for a motor vehicle according to Claim 12, wherein said airbag is the front airbag or side curtain airbag.