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High-moisture-barrier colorless transparent polyimide composite film and preparation method thereof

A technology of transparent polyimide and polyimide base film, applied in the field of polyimide film, can solve the problems of insufficient flexibility of CPI-glass composite film, insufficient barrier property and hardness of CPI film, etc. The effect of excellent bendable and foldable mechanical properties, high hardness and high water vapor barrier properties

Pending Publication Date: 2020-11-06
ZHEJIANG DAOMING OPTOELECTRONICS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention provides a new colorless and transparent polyimide film with high water vapor barrier for the deficiencies in the prior art, such as insufficient barrier properties and hardness of the CPI film, and the bendability of the CPI-glass composite film not meeting the requirements for actual use. Amine composite membrane and preparation method thereof

Method used

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  • High-moisture-barrier colorless transparent polyimide composite film and preparation method thereof
  • High-moisture-barrier colorless transparent polyimide composite film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A high water vapor barrier colorless transparent polyimide composite film, comprising polyimide base film 1, glass microchip 2, said polyimide base film 1 is made of polyamic acid precursor or polyimide The solution is solidified and formed, and also includes an organic filler, and the organic filler is dispersed in the polyimide base film 1, and the polyimide base film 1 wraps the glass microchip 2, and the glass microchip The angle between 2 and the plane of the polyimide base film 1 is α, 0°≤α≤30°, the thickness of the polyimide base film 1 is 15 μm, and the thickness of the glass microchip 2 The diameter of the glass microchip 2 is 1 μm, and the volume ratio of the polyimide base film 1 to the glass microchip 2 is 1:0.05.

[0034] Preferably, the edge of the glass microchip 2 has a cross-linkable group.

[0035] Preferably, the glass microchips 2 are connected to each other through the crosslinkable groups.

[0036] Preferably, the organic filler is a dispersant, ...

Embodiment 2

[0045]A high water vapor barrier colorless transparent polyimide composite film, comprising polyimide base film 1, glass microchip 2, said polyimide base film 1 is made of polyamic acid precursor or polyimide The solution is solidified and formed, and also includes an organic filler, and the organic filler is dispersed in the polyimide base film 1, and the polyimide base film 1 wraps the glass microchip 2, and the glass microchip The angle between 2 and the plane of the polyimide base film 1 is α, 0°≤α≤30°, the thickness of the polyimide base film 1 is 200 μm, and the thickness of the glass microchip 2 The diameter of the glass microchip 2 is 150 μm, and the volume ratio of the polyimide base film 1 to the glass microchip 2 is 0.25:1.

[0046] Preferably, the edge of the glass microchip 2 has a cross-linkable group.

[0047] Preferably, the glass microchips 2 are connected to each other through the crosslinkable groups.

[0048] Preferably, the organic filler is a dispersant...

Embodiment 3

[0057] A high water vapor barrier colorless transparent polyimide composite film, comprising polyimide base film 1, glass microchip 2, said polyimide base film 1 is made of polyamic acid precursor or polyimide The solution is solidified and formed, and also includes an organic filler, and the organic filler is dispersed in the polyimide base film 1, and the polyimide base film 1 wraps the glass microchip 2, and the glass microchip The angle between 2 and the plane of the polyimide base film 1 is α, 0°≤α≤30°, the thickness of the polyimide base film 1 is 100 μm, and the thickness of the glass microchip 2 The diameter of the glass microchip 2 is 70 μm, and the volume ratio of the polyimide base film 1 to the glass microchip 2 is 0.62:0.52.

[0058] Preferably, the edge of the glass microchip 2 has a cross-linkable group.

[0059] Preferably, the glass microchips 2 are connected to each other through the crosslinkable groups.

[0060] Preferably, the organic filler is a dispers...

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Abstract

The invention discloses a colorless transparent polyimide composite film with high moisture barrier. The colorless transparent polyimide composite film comprises a polyimide base film, a glass micro sheet and an organic filler, wherein the polyimide base film is formed by curing a polyamic acid precursor or a polyimide solution, the organic filler is dispersed in the polyimide base film, the polyimide base film wraps the glass micro sheet, the included angle between the glass micro sheet and the plane of the polyimide base film is alpha, alpha is greater than or equal to 0 degree and less thanor equal to 30 degrees, the thickness of the polyimide base film is 15-200 microns, the thickness of the glass micro sheet is 50 nm-5 [mu]m, the diameter of the glass micro sheet is 1-150 [mu]m, andthe volume ratio of the polyimide base film to the glass micro sheet is 1:0.05-0.25:1. According to the invention, the film layer structure that the polyimide base film wraps the glass micro sheet isadopted, so that the light transmittance of the polyimide composite film can be remarkably improved; and the surface hardness of the polyimide composite film can be enhanced by introducing the glass micro sheet, so that the defects of insufficient hardness of an existing CPI film and insufficient bending property of an existing CPI-glass composite film are overcome.

Description

technical field [0001] The invention relates to the technical field of polyimide films, in particular to a colorless and transparent polyimide composite film with high water vapor barrier and a preparation method thereof. Background technique [0002] In the field of flexible OLED displays, the transparency and flexibility of CPI films basically meet the requirements of practical applications, but the surface hardness and moisture barrier properties of CPI films do not meet the requirements of practical applications. At present, some technicians are coating on CPI films Organic hard layer or inorganic glass material to obtain high light transmission, high water resistance and high hardness properties, but this method greatly affects the flexibility of the CPI-glass composite film, making the CPI-glass composite film foldable And the flexibility is far from meeting the requirements of practical use, and in the preparation process, due to the large difference in the thermal ex...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L79/08C08K7/00C08K3/40C08J5/18
CPCC08J5/18C08J2379/08C08K7/00C08K3/40
Inventor 陈图强李祥涛徐鸿蓝庆东王宏胡智彪
Owner ZHEJIANG DAOMING OPTOELECTRONICS TECH
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