MANUFACTURING METHOD FOR HIGH-PRESSURE TANK, AND HIGH-PRESSURE TANK

摘要

A method of manufacturing a high-pressure tank, comprising: a step of forming a low-angle helical layer (52) on an outer surface of at least part of each liner dome portion (44) and an outer surface of a liner cylindrical portion (42), a step of forming an inner hoop layer (54) on an outer surface of the low-angle helical layer (52) on the liner cylindrical portion (42), and a step of forming a mixed layer (56) by alternately laminating a low-angle helical layer and an outer hoop layer on an outer surface of the inner hoop layer (54) and low-angle helical layer (52) on each liner dome portion (44). Then, on the liner cylindrical portion (42), 90% or more of the sum of the thickness of the inner hoop layer (54) and the thickness of the outer hoop layer in the mixed layer (56) is arranged within the range of 75% of the fiber reinforced plastics layer adjacent to the liner (40) in a thickness direction of the fiber reinforced plastics layer.