• 专利标题:   Black polyimide film comprises raw materials comprising polyamic acid resin, black pigment obtained by compounding carbon black and fluorinated graphene, shielding agent, and dispersing agent.
  • 专利号:   CN111793360-A
  • 发明人:   SUN S, PAN C, CHEN Z, FANG C, SHI E
  • 专利权人:   ANHUI GUOFENG PLASTIC IND CO LTD
  • 国际专利分类:   C08J005/18, C08K003/04, C08K003/22, C08K009/00, C08L079/08
  • 专利详细信息:   CN111793360-A 20 Oct 2020 C08L-079/08 202092 Pages: 6 Chinese
  • 申请详细信息:   CN111793360-A CN10656431 09 Jul 2020
  • 优先权号:   CN10656431

▎ 摘  要

NOVELTY - A black polyimide film comprises raw materials comprising a polyamic acid resin, a black pigment obtained by compounding carbon black and fluorinated graphene, a shielding agent, and a dispersing agent. USE - Black polyimide film. ADVANTAGE - The black polyimide film has high electrical strength of 150% or more and shielding property, and low light transmittance of less than 0.2% and pinhole rate. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparation of the black polyimide film, which involves adding (i) a solvent and dispersing agent to black pigment and shielding agent, grinding and dispersing to obtain a black slurry, adding (ii) the black slurry to the polyamic acid resin and stirring to obtain a black polyamic acid resin, casting (iii) the black polyamic acid resin into a film to obtain a self-supporting film, and thermally-imidizing (iv) and performing longitudinal stretching and transverse stretching of the self-supporting film.