Polyester resin blend, polyester film and preparation method thereof
AssigneeSK Chemicals Co., Ltd.
InventorsBoo-Youn LEE, Eui-Su KIM, Jong Ryang KIM
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Abstract
The present disclosure relates to a polyester resin blend, a polyester film and a preparation method of the same. The polyester resin blend is capable of providing a heat shrinkable label that is transparent and has excellent shrinkage even if it contains recycled polyethylene terephthalate as well as virgin polyethylene terephthalate. In addition, the heat shrinkable label can be reused while attached to a PET container, etc., and is expected to be useful for providing continuously usable plastics that have been recently attracting attention.
Claims17
A polyester film comprising a core layer and a skin layer,
- wherein the core layer comprises polyethylene terephthalate and a polyester resin in a weight ratio of 0:100 to 50:50, and the skin layer comprises polyethylene terephthalate and a polyester resin in a weight ratio of 10:90 to 100:0,
- wherein the polyester resin has a structure in which an acid moiety derived from a dicarboxylic acid or a derivative thereof and a diol moiety derived from a diol containing ethylene glycol and a comonomer are repeated,
- wherein the comonomer contains cyclohexanedimethanol, 4-(hydroxymethyl)cyclohexylmethyl 4-(hydroxymethyl)cyclohexanecarboxylate and 4-(4-(hydroxymethyl)cyclohexylmethoxymethyl)cyclohexylmethanol, and
- the polyester resin comprises 0.2 to 30 mol % of a diol moiety derived from 4-(hydroxymethyl)cyclohexylmethyl 4-(hydroxymethyl)cyclohexanecarboxylate and 4-(4-(hydroxymethyl)cyclohexylmethoxymethyl)cyclohexylmethanol with respect to the total diol moiety.
Dependencies are inferred from the claim text.