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Reflecting film and preparation method thereof

A technology of reflective film and mixture, applied in the direction of reflective reflectors, etc., can solve the problems of small space, moisture absorption and dimensional stability of the light guide plate, etc., to avoid scratches and top whitening, excellent scratch resistance and top whitening resistance , Improve the effect of reflectivity

Inactive Publication Date: 2020-04-10
NINGBO CHANGYANG TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional PMMA (polymethyl methacrylate) light guide plate absorbs moisture and has poor dimensional stability, and is gradually replaced by MS (styrene-methyl methacrylate copolymer) light guide plate with better dimensional stability
However, the MS material is softer than PMMA, and the backlight module is getting thinner and thinner, and the space between the reflective film and the light guide plate is getting smaller and smaller, which leads to problems of adsorption and scratches between the reflective film and the light guide plate. more and more prominent

Method used

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  • Reflecting film and preparation method thereof
  • Reflecting film and preparation method thereof
  • Reflecting film and preparation method thereof

Examples

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preparation example Construction

[0011] see figure 1 , the invention provides a kind of preparation method of reflective film, it comprises the following steps:

[0012] S1, providing a mixture, the mixture including porogen particles and matrix;

[0013] S2, coating the mixture on the surface of a substrate 3, and forming an isolation layer 2 on the surface of the substrate; and

[0014] S3, heat-treating the substrate 3 coated with the mixture to decompose the porogenic particles and release gas to form a plurality of pores, and at the same time, some of the pores protrude from the surface of the isolation layer 2 to form multiple pores. a convex structure to obtain the reflective film.

[0015] In step S1, the material of the matrix is ​​at least one of polymethyl methacrylate, styrene-methyl methacrylate copolymer, thermoplastic polyurethane elastomer, polyethylene terephthalate . Considering the flexibility of the material, preferably, the material of the matrix is ​​one of thermoplastic polyurethane...

Embodiment 1

[0028] Add ammonium bicarbonate to heat-cured polymethyl methacrylate glue, and the mass ratio of glue to sodium bicarbonate is 100:0.01. Stir at high speed with a high-speed mixer for 15 minutes, and then disperse the ammonium bicarbonate in the glue evenly. Then the uniformly stirred coating solution is evenly coated on the surface of the base film by a coating roller, and the isolation layer is dried and foamed in a 90°C oven for 1 minute, so that the total number of cells inside and on the surface of the isolation layer reaches: 10 2 piece / m 2 , the pore diameter of the internal cells is 0.1 μm-5 μm, the height of the convex structure on the surface is 5 μm-15 μm, and the reflective film is obtained.

Embodiment 2

[0030] Add ammonium bicarbonate to UV polymethyl methacrylate glue, and the mass ratio of glue to ammonium bicarbonate is 100:2. Stir at high speed with a high-speed mixer for 15 minutes, and then disperse the ammonium bicarbonate in the glue evenly. Then the evenly stirred coating solution is evenly coated on the surface of the base film by the coating roller, and the isolation layer is dried and foamed in a 120°C oven for 2 minutes, and then 450mJ / cm 2 The high-pressure mercury lamp with high energy irradiates to make it solidify and form, so that the total number of cells inside and on the surface of the isolation layer reaches: 10 3 piece / m 2 , the pore diameter of the internal cells is 0.1 μm-2 μm, the height of the surface convex structure is 5 μm-7 μm, and the reflective film is obtained.

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Abstract

The invention relates to a preparation method of a reflecting film. The method comprises the following steps of: providing a mixture which comprises pore-forming particles and a matrix; coating the mixture on the surface of a substrate to form an isolation layer on the surface of the substrate; and carrying out heating treatment on the substrate coated with the mixture to decompose the pore-forming particles to release gas so as to form a plurality of cells, and meanwhile, enabling parts of the cells to protrude from the surface of the isolation layer so as to form a plurality of convex part structures, thus obtaining the reflecting film. The invention also provides the reflecting film.

Description

technical field [0001] The invention relates to the field of thin film materials, in particular to a reflective film and a preparation method thereof. Background technique [0002] As an important optical component in traditional backlight modules, the market demand for reflective films is gradually diversifying. Among them, the requirements for the scratch resistance and anti-top whitening performance of the reflective film are also getting higher and higher. Traditional PMMA (polymethyl methacrylate) light guide plates absorb moisture and have poor dimensional stability, and are gradually replaced by MS (styrene-methyl methacrylate copolymer) light guide plates with better dimensional stability. However, the MS material is softer than PMMA, and the backlight module is getting thinner and thinner, and the space between the reflective film and the light guide plate is getting smaller and smaller, which leads to problems of adsorption and scratches between the reflective fil...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B5/12
CPCG02B5/12
Inventor 金亚东杨承翰熊斐朱正平
Owner NINGBO CHANGYANG TECH
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