Preparation method of multilayer composite film for backlight module set

A multi-layer composite film, backlight module technology, applied in optics, optical components, nonlinear optics, etc., can solve the problems affecting the thermal shrinkage performance, flattening performance, cumbersome processes, and complicated preparation methods of the film, and reduce the production process. and UV energy consumption, the process is simple and efficient, and the effect of reducing production costs

Active Publication Date: 2017-05-24
HEFEI LUCKY SCI & TECH IND +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Chinese patent CN103149610B discloses a multilayer composite prism sheet, which is to compound the upper prism sheet and the lower prism sheet through an adhesive, but it needs to prepare the upper prism sheet and the lower prism sheet respectively, and then coat the upper prism sheet Spread a layer of adhesive, and then compound the upper and lower prism sheets together with a composite roller. This preparation method is more complicated, the process is cumbersome, and it needs to be rewound and unrolled many times. Moreover, the adhesive is transparent and cannot cover Defects and defects on the surface of the prism film
[0004] In addition, the preparation method includes aging the upper prism sheet coated with the adhesive in an oven. This step does not indicate the extent of the aging, nor does it indicate whether the aging is before or after winding. Whether it can be unwound, whether it can continue to be compounded with the lower prism; after the finished product is rolled, it will be aged again, and this aging may affect the heat shrinkability and flatness of the film, etc.
These details are not described in the invention, but they will ultimately affect the usability, luminance, appearance and other properties of the composite film.

Method used

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  • Preparation method of multilayer composite film for backlight module set
  • Preparation method of multilayer composite film for backlight module set
  • Preparation method of multilayer composite film for backlight module set

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The preparation method comprises the following steps:

[0028] (1) Prepare the base material of the multilayer composite film for the backlight module: coat the diffuse reflection layer 21 on the PC film 22 (polycarbonate) of 125 μm, and the diffuse reflection layer is made of 20g ultraviolet light curing active monomer (trimethylolpropane Triacrylate, Changxing Chemical Materials Co., Ltd., trade name: EM231), 2g leveling aid (acrylic, BYK-350), 5g dispersion aid (Byk, BYK-111), 1g organic particles 23 (polystyrene PS, particle size is 4μm), 2g photoinitiator (1g photoinitiator 1 is 2-hydroxyl-2-methyl-1-phenyl-1-acetone, Beijing Yingli Technology Development Co., Ltd., commodity Name: IHT-PI 1173; 1g photoinitiator 2 is 2,4,6-trimethylbenzoyl-diphenylphosphine oxide, Beijing Yingli Technology Development Co., Ltd., trade name: IHT-PITPO), 70g The coating solution composed of ketone is cured; after the curing is completed, it is rolled up, and the diffuse reflection l...

Embodiment 2

[0033] The preparation of multilayer composite film comprises the following steps:

[0034] (1) Prepare the base material of the multilayer composite film for the backlight module: the diffuse reflection layer 21 is coated on the PET film 22 (polyethylene terephthalate) of 25 μm, and the diffuse reflection layer is made of 40g ultraviolet light curing active monomer ( Pentaerythritol triacrylate PET3A, Changxing Chemical Materials Co., Ltd., trade name: EM235), 0.5g leveling aid (acrylic acid, BYK-352), 0.5g dispersion aid (Byk, BYK-108), 0.05g organic particle (polymethyl acrylate PMMA, particle size is 6 μ m), 0.5g photoinitiator (0.42g photoinitiator 1 is 1-hydroxycyclohexyl phenyl ketone, Beijing Yingli Technology Development Co., Ltd., trade name : IHT-PI184; 0.08g photoinitiator 2 is ethyl 4-dimethylaminobenzoate, Beijing Yingli Science and Technology Development Co., Ltd., trade name: IHT-PI EDB), the coating solution that 58.45g ethyl acetate forms Cured; after the cu...

Embodiment 3

[0039] The preparation of multilayer composite film comprises the following steps:

[0040] (1) Prepare the base material of the multilayer composite film for the backlight module: the diffuse reflection layer 21 is coated on the PET film 22 (polyethylene terephthalate) of 50 μm, and the diffuse reflection layer is made of 40g ultraviolet light curing active monomer ( Two-trimethylolpropane tetraacrylate DiTMP4A, Changxing Chemical Materials Co., Ltd., trade name: EM242), 2g leveling aid (acrylic acid, BYK-354), 4g dispersion aid (ByK, BYK -2000), 2g organic particles (polybutylacrylate PBMA, particle size is 7μm), 2g photoinitiator (1.5g photoinitiator 1 is 2-hydroxyl-2-methyl-1-[4-(2-hydroxyl Ethoxy) phenyl]-1-acetone, Beijing Yingli Technology Development Co., Ltd., trade name: IHT-PI 659; 0.5g photoinitiator 2 is polyethylene glycol two (β-4-[to (2- Dimethylamine-2-benzyl) butyryl phenyl]-piperazine) propionate, Beijing Yingli Science and Technology Development Co., Ltd.,...

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Abstract

The invention relates to a preparation method of a multilayer composite film for a backlight module set. The method includes the following steps that: (1) the base material of the multilayer composite film for the backlight module set is prepared; (2) a second prism film is prepared; and (3) a first prism is prepared. The preparation method of the invention is simple and efficient. With the preparation method of the invention adopted, the separate preparation of a diffusion film and prism films is avoided, and complicated steps such as winding, unwinding and cutting can be also avoided; production procedures are decreased; UV energy consumption is reduced; production costs are reduced; and production capacity is improved.

Description

technical field [0001] The invention relates to the technical field of optical thin films, in particular to a method for preparing a multilayer composite film for a backlight module. Background technique [0002] A liquid crystal display (TFT-LCD) is mainly composed of a liquid crystal panel and a backlight module. Generally speaking, the backlight module is composed of a light source, a reflective film, a light guide plate, and an optical module, such as figure 1 As shown, a traditional optical module mainly includes two diffusion sheets and two prism sheets, which are sequentially arranged as an upper diffusion film, an upper prism film, a lower prism film, and a lower diffusion sheet from top to bottom. The diffuser film can convert the point light source or line light source into a uniform surface light source, and the prism film can concentrate the originally divergent light to the axial direction, thereby improving the front-view brightness of the LCD. With the trend...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B1/10G02B1/12G02F1/13357
CPCG02B1/10G02B1/12G02F1/133606G02F1/133607
Inventor 李恒何晶晶刘林方旸刘玉磊
Owner HEFEI LUCKY SCI & TECH IND
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