Patent ID: 11926705
Assignee: TAIMIDE TECHNOLOGY INCORPORATION
Field: Macromolecular chemistry, polymers (Chemistry)
Classification: CPC C | IPC C

Claim 2:
3. The black matte polyimide film of claim 1, wherein the polyimide fine powder is formed by reaction of a diamine compound and a dianhydride compound with a monomer molar ratio of 1:0.950 to 1:0.995, and an effective particle size (S) of 2-10 μm of the polyimide fine powder is greater than 70%, wherein the effective particle size (S) is S=B/(A+B+C)×100%
A: percentage of polyimide fine powder with a particle size of less than 2 μm,
B: percentage of polyimide fine powder with a particle size between 2 and 10 μm, and
C: percentage of polyimide fine powder with a particle size of more than 10 μm.