Polyester film for molded part

Abstract

A polyester film for molded part having low strain stress in processing, thermoforming in a target shape is easy and appearance is excellent even when a metallic thin membrane is provided. A polyester film for molded part includes a film having a polyester resin composition mixed with a resin (A) of polyethylene terephthalate and a resin (B) of polyester selected from the group consisting of a polybutylene terephthalate resin and a polytrimethylene terephthalate resin where a resin (A) is 10 to 90% by mass and a resin (B) is 90 to 10% by mass based on the total of resin (A) and resin (B), wherein the resin (B) of polyester comprises a resin (B1) of polybutylene terephthalate and a resin (B2) of polytrimethylene terephthalate being mixed such that a resin (B1) is 10 to 90% by mass and a resin (B2) is 90 to 10% by mass based on the total of resin (B1) and resin (B2), and a ratio (D/H) of a half bandwidth D (° C.) of a recrystallization peak in falling temperature by differential scanning calorimeter (DSC) to the peak height H (mW) is 3 to 150° C./mW.

Dependencies are inferred from the claim text.