| 摘要 |
<p>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.</p> |
