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US 11,920,010 B2Granted
Heat-sealable polyester film
AssigneeNan Ya Plastics Corporation
InventorsWen-Cheng Yang, Te-Chao Liao, Chun-Cheng Yang, Chia-Yen Hsiao, Ching-Yao Yuan
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Abstract
The disclosure discloses a heat-sealable polyester film, including a base layer and a heat-seal layer formed on the base layer. The heat-seal layer includes a physically regenerated polyester resin, a chemically regenerated polyester resin, and a modifier. The heat-sealable temperature of the heat-sealable polyester film is between 100° C. and 230° C.
Claims6
A heat-sealable polyester film, comprising:
- a base layer;
- and
- a heat-seal layer formed on at least one side surface of the base layer, wherein the heat-seal layer is formed by a polyester composition, and the polyester composition comprises:
- a physically regenerated polyester resin formed by physically regenerated polyester chips, and the physically regenerated polyester chips have a first intrinsic viscosity;
- a chemically regenerated polyester resin formed by chemically regenerated polyester chips, and the chemically regenerated polyester chips have a second intrinsic viscosity less than the first intrinsic viscosity;
- and
- a modifier dispersed in the physically regenerated polyester resin and the chemically regenerated polyester resin;
- wherein the physically regenerated polyester resin, the chemically regenerated polyester resin, and the modifier are mixed according to a predetermined intrinsic viscosity, so that the heat-seal layer has the predetermined intrinsic viscosity, and the modifier is configured so that the heat-sealable temperature of the heat-sealable polyester film has a range between 100° C. and 230° C. for heat-sealing, based on a total weight of 100 wt % of the heat-seal layer, a content of the physically regenerated polyester resin is between 50 wt % and 95 wt %, and a content of the chemically regenerated polyester resin is between 1 wt % and 40 wt %.
5 more elements
A heat-sealable polyester film, comprising:
- a base layer and a heat-seal layer formed on at least one side surface of the base layer, and the heat-seal layer has a predetermined intrinsic viscosity;
- wherein a modifier is added to the heat-seal layer, the modifier is configured so that the heat-sealable temperature of the heat-sealable polyester film has a range between 100° C. and 230° C. for heat-sealing, and a physically regenerated polyester resin, a chemically regenerated polyester resin, and the modifier are mixed according to a predetermined intrinsic viscosity, based on a total weight of 100 wt % of the heat-seal layer, a content of the physically regenerated polyester resin is between 50 wt % and 95 wt %, and a content of the chemically regenerated polyester resin is between 1 wt % and 40 wt %.
Dependencies are inferred from the claim text.