STRETCHED POLYESTER FOAMED SHEETS AND CONTAINERS OBTAINED THEREFROM

摘要

Polyester resin foamed sheets comprise copolyethylene terephthalate in which 2-20 mole % of units of terephthalic acid are replaced by isophthalic or naphthalene-dicarboxylic acid derived units. The crystallization rate of the resin is such that by heating at 120[deg]C for 5 minutes the crystallization does not exceed 15% and its density is 700 kg/m 3> (preferably 100-400).