Patent ID: 9393764
Filing Date: 2016-07-19
CPC Classification: B32B,B60K,C08F,C08L

Claim Text:
1. An automobile fuel tank including an outer wall comprising a main body of a multiple-layered synthetic resin, wherein said outer wall includes at least an outer body layer, an outer adhesive layer, a barrier layer, an inner adhesive layer, and an inner body layer, said outer body layer and said inner body layer comprising a high density polyethylene (HDPE) as a main ingredient, which has physical properties: (1) a modulus of elasticity of 1100 MPa to 1400 MPa at 23° C.; (2) a modulus of elasticity of 340 MPa to 430 MPa at 65° C.; (3) a modulus of elasticity of 400 MPa to 510 MPa at 23° C. after being immersed in Fuel D for 200 hours at 65° C. wherein Fuel D is prepared by composing isooctane and toluene in the ratio of 40 to 60, and Fuel D includes copper ion in an amount of 0.1 PPM and has a peroxide valence of 200 mg/kg; (4) a Charpy impact strength of 7 kJ/m (5) a full-notch creep test (FNCT) result of 50 hours to 300 hours at 80 ° C.; (6) a melt flow rate (MFR) result of 4 (g/10 minutes) to 6 (g/10 minutes) at 190° C. and a load of 21.6 kg; and (7) a melt tension of 18 g to 25 g when a sample that has been melted at 210° C. is extruded from a nozzle with a diameter of 2.095 mm and a length of 8 mm at an extrusion rate of 15 mm/min, and drawn at a take-up speed of 7.5 m/minute, wherein each of said outer adhesive layer and said inner adhesive layer comprises a synthetic resin having adhesiveness against both said high density polyethylene (HDPE) and said barrier layer, and wherein said barrier layer comprises a synthetic resin.