Preparation method of high-insulation matte black polyimide film

A black polyimide, high-insulation technology, applied in the field of preparation of high-insulation matte black polyimide film, can solve the problems of easy formation of holes, poor carbon black dispersion, low insulation strength of the film, etc. Use requirements, high insulation use requirements, outstanding matte effect

Pending Publication Date: 2020-11-10
ANHUI GUOFENG PLASTIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the poor dispersion of carbon black, easy conductivity, and easy agglomeration lead to low dielectric strength and poor appearance of the film, which limits the use of black polyimide films under high insulation requirements.
At the same time, in order to make the gloss of the film dull and look good, a small amount of micron-sized matting particles are added to the colloid, which further reduces the mechanical properties of the film, and it is also easy to form holes, resulting in poor appearance

Method used

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  • Preparation method of high-insulation matte black polyimide film

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Preparation of high insulation matte black polyimide film:

[0030] S1, 5g polyaniline, 20g 4,4-diaminodiphenyl ether are added in 200g DMF, pass into N 2 Stir for 0.5h until the solution becomes clear, then add 21g of pyromellitic dianhydride in portions for reaction to obtain a polyaniline-polyamic acid blend solution with a viscosity of 100-250Pa S, wherein the polyaniline has a weight average molecular weight of 10 Ten thousand;

[0031] S2. Place the polyaniline-polyamic acid blend solution in a vacuum oven for degassing for 5 hours, pour it on a mirror-polished steel plate, and scrape off the film evenly;

[0032] S3. Heat the film at 160°C for 25 minutes, at 260°C for 6 minutes, at 370°C for 6 minutes, at 470°C for 5 minutes, and peel off after cooling to obtain a high-insulation matte black polyimide film.

Embodiment 2

[0034] The difference between embodiment 2 and embodiment 1 is that the addition amount of polyaniline is 4g.

Embodiment 3

[0036] The difference between embodiment 3 and embodiment 1 is that the amount of polyaniline added is 3g.

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Abstract

The invention discloses a preparation method of a high-insulation matte black polyimide film, which comprises the following steps: dissolving polyaniline and aromatic diamine in a solvent, adding aromatic dianhydride to react, carrying out vacuum defoaming on the obtained polyaniline polyamide acid blended solution, and uniformly coating the base material with the solution to form an adhesive film, thereby obtaining the high-insulation matte black polyimide film. then removing a solvent, carrying out imidization treatment, and carbonizing polyaniline to obtain the high-insulation matte black polyimide film. The black polyimide film prepared by the method has the advantages of low gloss, high insulating strength, remarkable matte effect and good appearance, and can meet the use requirementof high insulation.

Description

technical field [0001] The invention relates to the technical field of polyimide films, in particular to a method for preparing a high-insulation matte black polyimide film. Background technique [0002] Polyimide film is widely used in electronic appliances, flexible display, 5G communication and other fields due to its unique high dielectric strength, high mechanical properties, high thermal properties and high dimensional stability. However, the traditional polyimide film is a yellow transparent film, which has poor shielding performance and cannot guarantee the privacy requirements of the covered circuit, so the black polyimide film came into being. At present, the suppliers of black polyimide film in the domestic market mainly include DuPont of the United States, SKC of South Korea, Ruihuatai, Ningbo Jinshan, Guilin Electric Technology Institute, etc. Its main preparation method is to complete by adding surface-modified carbon black to common polyamic acid solution. H...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J5/18C08G73/10C08L79/08C08L79/02
CPCC08J5/18C08G73/1067C08J2379/08C08J2479/02
Inventor 孙善卫孙小强陈铸红
Owner ANHUI GUOFENG PLASTIC
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