POLYESTER FILM AND METHOD FOR MANUFACTURING THE SAME

    公开(公告)号:US20210047493A1

    公开(公告)日:2021-02-18

    申请号:US16795687

    申请日:2020-02-20

    Abstract: A polyester film and a method for manufacturing the polyester film are provided. The method for manufacturing a polyester film by using a recycled plastic material includes the following steps. A part of the recycled plastic material is physically reproduced to obtain a physically regenerated polyester resin. Another part of the recycled plastic material is chemically reproduced to obtain a chemically regenerated polyester resin. A polyester composition including the physically regenerated polyester resin and the chemically regenerated polyester resin is prepared. Based on a total weight of the polyester composition being 100 wt %, a weight of the chemically regenerated polyester resin is larger than or equal to 5 wt %. The polyester film is manufactured by using the polyester composition. Based on a total weight of the polyester film being 100 wt %, a total amount of the physically regenerated polyester resin and the chemically regenerated polyester resin is from 10 wt % to 100 wt %.

    METHOD FOR MANUFACTURING POLYESTER FILM FOR EMBOSSING

    公开(公告)号:US20230212364A1

    公开(公告)日:2023-07-06

    申请号:US18121194

    申请日:2023-03-14

    Abstract: A method for manufacturing a polyester film for embossing that is made from a recycled polyester material. A part of the recycled polyester material is physically reproduced to obtain physically regenerated polyester chips. The physically regenerated polyester chips include physically regenerated regular polyester chips. Another part of the recycled polyester material is chemically reproduced to obtain chemically regenerated polyester chips. The chemically regenerated polyester chips include chemically regenerated regular polyester chips and chemically regenerated electrostatic pinning polyester chips. The physically regenerated polyester chips and the chemically regenerated polyester chips are mixed to form a base material. The base material is used to form a base layer that having a main component of regenerated polyethylene terephthalate. A surface coating layer is formed onto the base layer. A material of the surface coating layer includes a main resin, fillers, and melamine.

    Black polyester film and method for manufacturing the same

    公开(公告)号:US11639430B2

    公开(公告)日:2023-05-02

    申请号:US17400146

    申请日:2021-08-12

    Abstract: A black polyester film and a method for manufacturing the same are provided. The method for manufacturing the black polyester film includes: providing a recycled polyester material; physically regenerating a part of the recycled polyester material to form physically regenerated polyester chips having a first intrinsic viscosity; chemically regenerating another part of the recycled polyester material to form chemically regenerated polyester chips having a second intrinsic viscosity lower than the first intrinsic viscosity; mixing black regenerated polyester chips, the physically regenerated polyester chips, and the chemically regenerated polyester chips according to a predetermined intrinsic viscosity so as to form a polyester chip raw material; melting and then extruding the polyester chips raw material to form the black polyester film having the predetermined intrinsic viscosity.

    Polyester film and method for manufacturing the same

    公开(公告)号:US11572449B2

    公开(公告)日:2023-02-07

    申请号:US17195558

    申请日:2021-03-08

    Abstract: A polyester film and a method for manufacturing the same are provided. The polyester film includes a physically recycled polyester resin and a chemically recycled polyester resin. The physically recycled polyester resin is formed by a plurality of physically recycled polyester chips. The chemically recycled polyester resin is formed by a plurality of chemically recycled polyester chips and mixed with the physically recycled polyester resin. The plurality of chemically recycled polyester chips further includes chemically recycled electrostatic pinning polyester chips. The chemically recycled electrostatic pinning polyester chips contain electrostatic pinning additives, and the electrostatic pinning additives are metal salts. Expressed in percent by weight based on a total weight of the polyester film, a content of the electrostatic pinning additives in the polyester film is between 0.005% and 0.1% by weight.

    Recyclable retort pouch and recyclable retort polyester film thereof

    公开(公告)号:US11383502B2

    公开(公告)日:2022-07-12

    申请号:US17037891

    申请日:2020-09-30

    Abstract: A recyclable retort pouch and a recyclable retort polyester film thereof are provided. The recyclable retort polyester film includes a heat seal layer and at least one polyester layer. The heat seal layer is composed of isophthalic acid, neopentyl glycol, polybutylene terephthalate, 1,4-cyclohexanedimethanol, and polyethylene terephthalate-1,4-cyclohexane dimethanol ester. The polyester layer is formed on the heat seal layer, and is composed of a polyester composition. The polyester composition includes a polyester resin made from recycled PET bottle flakes processed by physical or chemical methods and the polyester resin has an inherent viscosity between 0.62 dl/g and 1.0 dl/g. The recyclable retort pouch is made of the recyclable retort polyester film.

    ULTRAVIOLET-ABSORBING POLYESTER FILM AND METHOD FOR MANUFACTURING THE SAME

    公开(公告)号:US20220017709A1

    公开(公告)日:2022-01-20

    申请号:US17203762

    申请日:2021-03-17

    Abstract: An ultraviolet-absorbing polyester film and a method for manufacturing the same are provided. The ultraviolet-absorbing polyester film includes a physically recycled polyester resin and a chemically recycled polyester resin. The physically recycled polyester resin is formed by a plurality of physically recycled polyester chips. The chemically recycled polyester resin is formed by a plurality of chemically recycled polyester chips. The plurality of chemically recycled polyester chips further includes chemically recycled electrostatic pinning polyester chips. The chemically recycled electrostatic pinning polyester chips contain electrostatic pinning additives, and the electrostatic pinning additives are metal salts. Expressed in percent by weight based on a total weight of the ultraviolet-absorbing polyester film, a content of the electrostatic pinning additives is between 0.005% and 0.1% by weight. The ultraviolet-absorbing polyester film further contains an ultraviolet absorber.

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