White polyimide film and preparation method thereof

A polyimide film and white technology, which is applied in the field of white polyimide film and its preparation, can solve the problems of poor mechanical strength and poor stability of polyimide film, and achieve good mechanical strength and good stability , good toughness

Inactive Publication Date: 2018-12-14
安徽统唯新材料科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the defects of poor stability and poor mechanical strength of polyimide films in the prior art, and to provide a white polyimide film and its preparation method to solve the above problems

Method used

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  • White polyimide film and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0015] Step 1: According to the mass percentage, add 80.07% of dimethylacetamide and 9.5% of diaminodiphenyl ether into the reactor, stir for 45 minutes, then add 10.4% of pyromellitic dianhydride into the reactor, and stir After 45 minutes, finally add 0.03% of nano-titanium dioxide into the reaction kettle, stir for 45 minutes, and prepare glue after the stirring is completed;

[0016] Step 2: The glue solution prepared in step 1 is salivated onto the surface of the mirror steel belt of the casting machine through the spraying die, and the glue solution is prepared into a gel film by the casting machine under the condition of 130°C;

[0017] Step 3: Peel off the gel film from the surface of the mirror steel belt of the casting machine. Under the condition of 400°C, use a longitudinal stretching machine to stretch the gel film longitudinally. The stretching ratio of the longitudinal stretching is 1.2 , and then use a transverse stretching machine to transversely stretch the g...

Embodiment 2

[0019] Step 1: According to the mass percentage, add 80% of dimethylacetamide and 9.5% of diaminodiphenyl ether into the reactor, stir for 30 minutes, then add 10.4 pyromellitic dianhydride into the reactor, and stir for 40 minutes Finally, add 0.10% nano-titanium dioxide into the reaction kettle, stir for 30 minutes, and prepare the glue after the stirring is completed;

[0020] Step 2: The glue solution prepared in step 1 is salivated onto the surface of the mirror steel belt of the casting machine through the spraying die, and the glue solution is prepared into a gel film by the casting machine under the condition of 120°C;

[0021] Step 3: Peel off the gel film from the surface of the mirror steel belt of the casting machine. Under the condition of 410°C, use a longitudinal stretching machine to stretch the gel film longitudinally. The stretching ratio of the longitudinal stretching is 1.2 , and then use a transverse stretching machine to transversely stretch the gel film,...

Embodiment 3

[0023] As a preference, the invention discloses a white polyimide film, which is composed of the following components according to mass percentage: 10.4% of pyromellitic dianhydride, 9.5% of diaminodiphenyl ether, and 79.95% of dimethylacetamide , Nano titanium dioxide 0.15%.

[0024] Step 1: According to the mass percentage, add 79.95% of dimethylacetamide and 9.5% of diaminodiphenyl ether into the reactor, stir for 50 minutes, then add 10.4% of pyromellitic dianhydride into the reactor, and stir After 35 minutes, finally add 0.15% of nano-titanium dioxide into the reaction kettle, stir for 45 minutes, and prepare glue after the stirring is completed;

[0025] Step 2: The glue solution prepared in step 1 is salivated onto the surface of the mirror steel belt of the casting machine through the spraying die, and the glue solution is prepared into a gel film by the casting machine under the condition of 120°C;

[0026] Step 3: Peel off the gel film from the surface of the mirro...

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Abstract

The invention discloses a white polyimide film and a preparation method thereof. The white polyimide film is prepared from components in percentage by mass as follows: 5%-20% of benzenetetracarboxylicanhydride, 5%-20% of diaminodiphenyl ether, 60%-90% of dimethylacetamide and 0.03%-0.15% of nano-titania. The preparation method comprises the steps as follows: dimethylacetamide and diaminodiphenylether are added to a reactor to be stirred, then, benzenetetracarboxylic anhydride is added to the reactor, stirring is performed, finally, nano-titania is added to the reactor, stirring is performed,and a gel solution is prepared after stirring; a gel film is prepared from the gel solution by a casting machine; the gel film is stripped from the surface of a mirror steel belt of the casting machine, the gel film is stretched longitudinally by a longitudinal stretcher and then stretched transversely by a transverse stretcher, and the white polyimide film is prepared. The white polyimide film has the advantages of good stability, good mechanical strength and the like.

Description

technical field [0001] The invention relates to the field of production and processing of polyimide films, in particular to a white polyimide film and a preparation method thereof. Background technique [0002] Polyimide film is one of the earliest products of polyimide. Because of its excellent electrical properties and radiation resistance, it is widely used in coatings, advanced composite materials and engineering plastics. Therefore, the polyimide film industry is expanding. Whether considering the domestic and foreign development trend of high-performance organic films or the urgent demand for polyimide films in domestic high-tech industries, it is very necessary to realize the industrialization of polyimide films at present. Relevant state departments should give guidance from the policy aspect, give sufficient attention and support to the development and production of high-performance polyimide films, and promote the expansion of industrial production scale of high-pe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L79/08C08K3/22C08J5/18C08G73/10
CPCC08J5/18C08G73/1007C08G73/1071C08J2379/08C08K2003/2241C08K2201/011
Inventor 王超
Owner 安徽统唯新材料科技股份有限公司
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