POLYESTER FILM FOR DRY FILMS
    7.
    发明申请

    公开(公告)号:US20210332218A1

    公开(公告)日:2021-10-28

    申请号:US17201191

    申请日:2021-03-15

    Abstract: A polyester film for dry films includes a polyester resin matrix and a plurality of spherical smoothing agents dispersed in the polyester resin matrix. The polyester resin matrix has a refractive index with a range from 1.5 to 1.7. Each of the spherical smoothing agents has a refractive index within a range from 1.3 to 1.9, a particle size within a range from 50 nm to 2 μm, and a circularity not less than 0.7. A surface of each of the spherical smoothing agents is covered with a siloxane compound or modified with siloxy to be in contact with the polyester resin matrix. The polyester film for dry films is a biaxially-stretched polyester film, and the polyester film for dry films has a haze not greater than 1%, a transparency not less than 85%, and a circuit resolution not greater than 10 μm.

    MATTE POLYESTER FILM AND METHOD FOR MANUFACTURING THE SAME

    公开(公告)号:US20210332214A1

    公开(公告)日:2021-10-28

    申请号:US17197042

    申请日:2021-03-10

    Abstract: A matte polyester film and a method for manufacturing the same are provided. The matte 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 include 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. The matte polyester film further includes a matting additive.

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