| 摘要 |
A dyed polyester film comprising a B/A/B' type laminate structure wherein B and B' are clear polyester layers not containing a dye additive or a sublimate forming material and having a thickness LB and LB, and a glass transition TgB and TgB'; A is a dyed polyester layer containing a dye additive and having a thickness LA and a glass transition temperature TgA; wherein the polyester in B, B' and A is poly(ethylene terephthalate), poly(ethylene naphthalate), polyesters containing sulfonate groups, copolymers of poly(ethylene terephthalate), poly(ethylene naphthalate), or copolymers of poly(ethylene terephthalate) and poly(cyclohexane dimethylene terephthalate). A method of producing the dyed polyester film is also disclosed.
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