Black matte polyimide film
    13.
    发明授权

    公开(公告)号:US11926705B2

    公开(公告)日:2024-03-12

    申请号:US17700541

    申请日:2022-03-22

    Abstract: A black matte polyimide film is provided, the black matte polyimide film includes polyimide, carbon black and polyimide fine powder. The polyimide component is obtained by polymerization of a dianhydride and a diamine, followed by chemical cyclization, in which the dianhydride is pyromellitic dianhydride, and the diamine comprises 5˜15 mol % of p-phenylenediamine and 95˜85 mol % of 4,4′-diaminodiphenyl ether; the carbon black is present in an amount of 2 to 8 wt % of the polyimide film; and the polyimide fine powder is present in an amount of 5 to 10 wt % of the polyimide film, such that the black matte polyimide film has a glossiness between 5 and 30 and a thermal expansion coefficient of less than 41 ppm/° C.

    POLYIMIDE COMPOSITE FILM FOR USE IN FLEXIBLE METAL CLAD SUBSTRATE

    公开(公告)号:US20220339920A1

    公开(公告)日:2022-10-27

    申请号:US17725573

    申请日:2022-04-21

    Abstract: A polyimide composite film for use in a flexible metal clad substrate, comprising: a polyimide base material film; a fluorine polymer layer, formed on at least one surface of the polyimide base material film, comprising polyimide resins and fluorine polymers, wherein the polyimide resin accounts for 2 to 20 wt % of the total solid content of the fluorine polymer layer, the aromatic functional group ratio of the polyimide resin in the fluorine polymer layer is greater than 35%, and the absorption onset wavelength (λonset) of the ultraviolet-visible spectrum is greater than 360 nm; a thickness ratio of the polyimide base material film to one layer of the fluorine polymer layers is 8:1 to 1:4; and a total thickness of the polyimide composite film is between 18 and 175 microns. Thus, the polyimide composite film has a low dielectric constant, low loss factor, and has good drilling processability.

    FABRICATION OF A ROLL OF A GRAPHITE FILM BASED ON A ROLLED POLYIMIDE FILM

    公开(公告)号:US20180148339A1

    公开(公告)日:2018-05-31

    申请号:US15372109

    申请日:2016-12-07

    Abstract: A process of fabricating a graphite film includes providing a roll of a polyimide film, applying a first thermal treatment so that the roll of the polyimide film is carbonized to form a roll of a carbon film, and applying a second thermal treatment so that the roll of the carbon film is converted to a roll of a graphite film. The rolled polyimide film has a thickness between 10 μm and 150 μm, and includes polyimide derived from reaction of diamine monomers with dianhydride monomers, the dianhydride monomers including pyromellitic dianhydride (PMDA), the diamine monomers including 4,4′-oxydianiline (4,4′-ODA) and phenylenediamine (PDA) with a ODA:PDA diamine molar ratio being 50:50 to 80:20.

    Polyimide film incorporating polyimide powder delustrant, and manufacture thereof
    18.
    发明授权
    Polyimide film incorporating polyimide powder delustrant, and manufacture thereof 有权
    含有聚酰亚胺粉末消泡剂的聚酰亚胺膜及其制造方法

    公开(公告)号:US09267057B2

    公开(公告)日:2016-02-23

    申请号:US14060131

    申请日:2013-10-22

    Abstract: A polyimide film includes a polyimide layer including a polyimide base polymer, and a polyimide powder distributed in the polyimide base polymer, the polyimide powder being obtained by reacting a diamine with a dianhydride at a molar ratio of about 1:0.950 to about 1:0.995. Moreover, the polyimide film may have a multilayered structure including at least a second polyimide layer stacked on a surface of the polyimide layer. The second polyimide can also include the polyimide powder at a weight ratio less than about 20 wt % of the total weight of the second polyimide layer. Embodiments described herein also include methods of preparing the polyimide films.

    Abstract translation: 聚酰亚胺膜包括聚酰亚胺基层聚酰亚胺层和分散在聚酰亚胺基聚合物中的聚酰亚胺粉末,该聚酰亚胺粉末是通过二胺与二酸酐的摩尔比为约1:0.950至约1:0.995 。 此外,聚酰亚胺膜可以具有至少包含层叠在聚酰亚胺层的表面上的第二聚酰亚胺层的多层结构。 第二聚酰亚胺还可以包含聚酰亚胺粉末,其重量比小于第二聚酰亚胺层的总重量的约20重量%。 本文所述的实施方案还包括制备聚酰亚胺膜的方法。

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