Light diffusing polyester film

A technology of polyester film and light diffusion, applied in the field of materials, to achieve high light transmittance, avoid environmental pollution, and sufficient optical diffusion

Inactive Publication Date: 2015-07-22
南京亚博联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

[0005] In view of the prior art, in view of the many problems of organic solvents on the environment caused by the coating method of the existing light diffusion film, the present invention provides a film with sufficient light transmittance and light diffusion directly through the bidirectional pulling process. Non-toxic polyester film, the light diffusivity is greatly improved under the premise of limited decrease in light transmittance, and the environmental pollution problem caused by the subsequent coating process is eliminated

Method used

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  • Light diffusing polyester film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Surface layer: 25% Yizheng chemical fiber FG610, 75% Yizheng chemical fiber SB500

[0031] Middle layer: 5% PP, 10% Changzhou Lucky LK7020 (2.5% silicon dioxide mass ratio, particle size about 4um), 85% Yizheng chemical fiber SB500

[0032] The properties of the optical diffusion film prepared after biaxial stretching and heat setting are shown in Table 1.

Embodiment 2

[0034] Surface layer: 15% Shanghai Lianle MB40 (silica mass ratio content 40%, particle size about 5-6um), 75% Yizheng chemical fiber SB500

[0035] Middle layer: 3% PP, 97% Yizheng chemical fiber SB500

[0036] The properties of the optical diffusion film prepared after biaxial stretching and heat setting are shown in Table 1.

Embodiment 3

[0038] Surface layer: 30% Shanghai Lianle MB40 (silica mass ratio content 40%, particle size about 5-6um), 75% Yizheng chemical fiber SB500

[0039] Middle layer: 3% PP, 97% Yizheng chemical fiber SB500

[0040] The properties of the optical diffusion film prepared after biaxial stretching and heat setting are shown in Table 1.

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Abstract

The invention discloses a light diffusing polyester film comprising an intermediate layer and two surface layers, wherein the intermediate layer and the surface layers are mainly made of polyester. The intermediate layer is doped with 0.1-3% of light diffusing particles and 0.3-10% of at least two thermoplastic incompatible resins. The surface layers are doped with 1-15% of light diffusing particles. The surface layers are arranged on the two sides of the intermediate layer, and are formed by the steps of co-extruding through an extruder, pulling and heat setting. The polyester film with full light transmission and light diffusion performances is prepared directly by a two-way pulling technology. The light diffusion performance is greatly improved on the premise of limited decrease of the light transmission performance. The problem of environment pollution brought by a subsequent coating process is avoided.

Description

technical field [0001] The invention belongs to the field of materials, in particular to a light diffusion film used in a backlight module component in a liquid crystal display. Background technique [0002] The light diffusion film is used to diffuse light from point light sources or linear light sources, or to adjust the angle of outgoing light, so as to obtain uniform surface illumination with high front brightness. Such a light-diffusing film is widely used in, for example, liquid crystal displays and liquid crystal televisions equipped in mobile phones, digital cameras, and the like. [0003] The cross-sectional structure of a general light-diffusing film is as follows: figure 1 shown. In general, the light diffusion film 7 contains an optical grade highly transparent polyester film substrate, a light diffusion layer 11 and a back layer 12, the light diffusion layer 11 is formed on one side of the substrate 10, and the back layer 12 on the other side of the substrate ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B5/02C08L67/02C08L83/04C08K3/36C08K7/20
CPCG02B5/0242C08L67/02C08L2205/03G02B5/0247G02B5/0268G02B5/0278C08L83/04C08K3/36C08K7/20
Inventor 刘勇黄云崚臧晓鹏
Owner 南京亚博联新材料科技股份有限公司
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