Patent ID: 11958985
Assignee: NAN YA PLASTICS CORPORATION
Field: Other special machines (Mechanical engineering)
Classification: CPC B  C  Y | IPC B  C

Claim 0:
1. A heat sealable polyester film which is formed from a recycled polyester material, the heat sealable polyester film comprising:
a base layer, comprising a main component of regenerated polyethylene terephthalate with a first melting temperature; and
a heat sealable layer disposed on at least one surface of the base layer, the heat sealable layer formed from a first polyester composition, the first polyester composition consisting of regenerated polyethylene terephthalate and polybutylene terephthalate;
wherein the regenerated polyethylene terephthalate includes a physically regenerated polyester resin and a chemically regenerated polyester resin, and the physically regenerated polyester resin is formed by fusing the polybutylene terephthalate and the recycled polyester material;
wherein, based on a total weight of the physically regenerated polyester resin being 100 wt %, a content of PBT ranges from larger than 0 wt % to 30 wt %;
wherein a heat sealing temperature of the heat sealable polyester film is lower than the first melting temperature in a range from 120° C. to 230° C.