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Light guide plate protecting film

A technology of protective film and light guide plate, applied in synthetic resin layered products, layered products, chemical instruments and methods, etc., can solve the problems of warpage of light guide plate, high thermal expansion rate of PMMA material, poor ductility of PE protective film, etc.

Inactive Publication Date: 2019-03-08
SUZHOU CHANGGONG PHOTOELECTRIC TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, since the thermal expansion rate of the PMMA material is higher than that of PE, the PE protective film will shrink on the surface of the light guide plate during infrared heating. During the cooling process, the PE protective film has poor ductility and will not recover after being cooled. The light guide plate below is also warped

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0015] A protective film for a light guide plate comprises a first film, a fiber reinforced layer and a second film from top to bottom, wherein the second film is in contact with the light guide plate.

[0016] The first film is made of polyethylene, the second film is made of a blend of polyethylene and polypropylene, where the ratio of polyethylene to polypropylene is 2:1, and the density of polyethylene in the first and second films is 0.95 , the elastic modulus of the second film is 1100MPA.

[0017] The fiber reinforced layer is formed by blending sodium dodecyl sulfate and carbon nanotubes and coating between the first film and the second film.

Embodiment 2

[0019] A protective film for a light guide plate comprises a first film, a fiber reinforced layer and a second film from top to bottom, wherein the second film is in contact with the light guide plate.

[0020] The first film is made of polyethylene, the second film is made of a blend of polyethylene and polypropylene, where the ratio of polyethylene to polypropylene is 2.5:1, and the density of polyethylene in the first and second films is 0.942 , the elastic modulus of the second film is 1000MPA.

[0021] The fiber reinforced layer is formed by blending sodium dodecyl sulfate and carbon nanotubes and coating between the first film and the second film.

Embodiment 3

[0023] A protective film for a light guide plate comprises a first film, a fiber reinforced layer and a second film from top to bottom, wherein the second film is in contact with the light guide plate.

[0024] The first film is made of polyethylene, the second film is made of a blend of polyethylene and polypropylene, where the ratio of polyethylene to polypropylene is 3:1, and the density of polyethylene in the first film and the second film is 0.96 , the elastic modulus of the second film is 1000MPA.

[0025] The fiber reinforced layer is formed by blending sodium dodecyl sulfate and carbon nanotubes and coating between the first film and the second film.

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Abstract

The invention discloses a light guide plate protecting film which comprises a first thin film, a fiber reinforcement layer and a second thin film, wherein the first thin film is made of polyethylene;the fiber reinforcement layer is prepared by blending lauryl sodium sulfate and a carbon nano tube; the second thin film is prepared by blending polyethylene and polypropylene. By arranging the fiberreinforcement layer between the first thin film and the second thin film, the overall elastic modulus and the thermal expansion and cold contraction resistance of the light guide plate protecting filmare improved, and the warping deformation of a light guide plate coated with the protecting film is reduced.

Description

technical field [0001] The invention relates to the field of protective films, in particular to a protective film for a light guide plate. Background technique [0002] The light guide plate is mostly made of PMMA. Due to the low hardness of the light guide plate, in order to prevent the surface of the light guide plate from being scratched, the surface of the light guide plate usually needs to be attached with a thicker protective film made of PE material. During the printing process of the light guide plate, infrared heating is usually used for drying, that is, infrared heating is used to dry the printing ink, and then the printing ink is cooled by ventilation. [0003] However, since the thermal expansion rate of the PMMA material is higher than that of PE, the PE protective film will shrink on the surface of the light guide plate during infrared heating. During the cooling process, the PE protective film has poor ductility and will not recover after being cooled. The li...

Claims

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Application Information

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IPC IPC(8): B32B27/32B32B9/00B32B9/04
CPCB32B9/00B32B9/04B32B27/32B32B2307/308B32B2307/51
Inventor 许伟铭周友成黄和兵
Owner SUZHOU CHANGGONG PHOTOELECTRIC TECH CO LTD
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