| 摘要 |
PROBLEM TO BE SOLVED: To provide a welding joint of a fuel tank provided with good anti-fuel permeability at a cylindrical part and a melted part while ensuring good welding property relative to a fuel tank. SOLUTION: In the welding joint 12 having the cylindrical part 16 for pipe connection and the melted part 18 and heat-melted and integrated to the fuel tank 10 made of resin, an inner layer 32 of the melted part 18 is constituted with a base part 16-2 at the cylindrical part 16 using a resin alloy material obtained by making denatured HDPE in which a functional group having high affinity relative to a hydroxyl group of EVOH is introduced with EVOH to alloy. It is made to a lamination structure that the inner layer 32 is covered by an outer layer 34 using HDPE resin. COPYRIGHT: (C)2006,JPO&NCIPI |
