| 摘要 |
A joint part 1 excellent in both properties of low fuel permeability and weldability. The joint part 1 includes a cylindrical main body 2 , a welding member 3 , provided on the cylindrical main body, to be welded on a rim of an opening end of a resin fuel tank 4 , wherein the main body and the welding member are integrally formed by an alloy prepared by using main components of following components (A) and (B) and kneading the alloy at a temperature of not more than melting points of the component (A) and a following component (b), and the component (B) is present at an amount of 80 to 300 parts by volume based on 100 parts by volume of the component (A), and a modification ratio of the component (b) is 0.1 to 5% by weight; (A) an ethylene vinyl alcohol copolymer (B) a high density polyethylene wherein a following component (b) is a main component; (b) a modified high density polyethylene having at least one functional group selected from the group consisting of a maleic anhydride group and the like.
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