LAMINATE STEEL SHEET FOR TWO-PIECE CAN BODY, TWO-PIECE CAN BODY MADE OF LAMINATE STEEL SHEET, AND METHOD FOR PRODUCTION OF THE TWO-PIECE CAN BODY

摘要

Disclosed is a laminate steel sheet for a two-piece can body, which comprises a steel sheet and a copolyethylene terephthalate resin layer formed on at least one surface of the steel sheet and which satisfies the requirements expressed by the formulae shown below, wherein the copolyethylene terephthalate resin layer comprises at least one member selected from the group consisting of isophthalic acid and cyclohexanedimethanol as a copolymerization component in an amount of 5 to 20 mol% and has a crystallization temperature of 120 to 140°C. r1 = r, 0.1 = r1/R = 0.25, and 1.5 = h/(R-r) = 4 [wherein, r1: a minimum radius of the can body, r: a maximum radius of the can body, h: a height of the ban body, and R: a radium of a cylindrical, unmolded product of the laminate steel sheet which has the same weight as that of the can body.] The laminate steel sheet is suitable for a two-piece can body having high processability and enables to provide a two-piece can free from the concern of peeling or breakage in the resin layer.