Hollow molding for touching high pressure hydrogen and manufacturing method of hollow molded article touching high pressure hydrogen

摘要

Problem to be solved: to provide a hollow molded product having no defect point and small coefficient of linear expansion even after repeated filling and releasing of high-pressure hydrogen.A hollow molded article that touches the high pressure hydrogen, and the hollow molded article is 100 degrees deep from the outer surface of the hollow molded article μ Average crystallinity up to μ A hollow molded article that refers to the average crystallinity up to m is 15% or more.No selection