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Preparation method of polyimide film

A technology of polyimide film and polyamic acid, which is applied in the field of preparation of polyimide film, can solve the problems of harsh production conditions, high product price, complex process, etc., achieve good uniformity, improve flatness and intrinsic Performance, surface clean and smooth effect

Inactive Publication Date: 2015-03-25
六安市杜尔邦绝缘材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The impregnation method has simple equipment and simple process, but aluminum powder is often stuck on the surface of the film, the length of the film is limited, and the production efficiency is low. Large investment, high product price, only high-quality film can use this method
[0004] The polyimide film produced by ordinary formula is not perfect in flatness and internal performance, and cannot meet the needs of users well

Method used

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Examples

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Comparison scheme
Effect test

Embodiment Construction

[0025] In order to further illustrate the present invention, the following examples are cited, but the present invention is not limited to the following examples.

[0026] Take the production of 1000㎏ polyimide film as an example:

[0027] 1. Raw material preparation:

[0028] Pyromellitic dianhydride 500kg

[0029] 4,4-diaminodiphenyl ether 490kg

[0030] Dimethylacetamide 1500kg

[0031] Castor oil (content 99.99%) 5kg

[0032] Triphenol Phosphite (content 99.99%) 5kg

[0033] Silicone oil: 3kg

[0034] Acetic anhydride: 10kg;

[0035] 2. The raw materials are mixed and reacted, and the solution after the reaction is defoamed;

[0036] 3. Put the treated solution into the casting nozzle storage tank, form a liquid film through the steel belt of the casting machine, and then dry it to form a film;

[0037] 4. The film is peeled off from the steel belt through the guide roller, and enters the imidization furnace, and the film is subjected to imidization treatment;

[...

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Abstract

The invention discloses a preparation method of a polyimide film. According to the preparation method, the polyimide film is produced by virtue of a tape-casting method, the adopted device has high precision, the produced polyimide film has the advantages of good uniformity, clean and flat surface, unlimited length and excellent performance and can be continuously produced; and a novel material is added into an original formula so as to protect the film from damage and improve the flatness and intrinsic property of the film. The high-quality polyimide film can be produced by the preparation method which is convenient, fast, safe, efficient and the like.

Description

technical field [0001] The invention relates to the technical field of film preparation, in particular to a preparation method of a polyimide film. Background technique [0002] Polyimide film is one of the earliest products of polyimide, which is used for slot insulation of motors and wrapping materials for cables. Transparent polyimide films serve as flexible solar cell substrates. [0003] The production of polyimide is basically a two-step method: 1. Synthesis of polyimide acid; 2. Film-forming imidization. The film forming methods mainly include dipping method, casting method and casting stretching method. The impregnation method has simple equipment and simple process, but aluminum powder is often stuck on the surface of the film, the length of the film is limited, and the production efficiency is low. The investment is large and the product price is high. Only high-quality films can use this method. [0004] The polyimide film produced by ordinary formula is no...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J5/18C08L79/08C08G73/10
Inventor 尤耀康
Owner 六安市杜尔邦绝缘材料有限公司
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