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A kind of base film for prism composite film

A composite film and base film technology, applied in the fields of instruments, optics, diffusing elements, etc., can solve the problems of complex preparation methods, cumbersome procedures, and insufficiently detailed description of adhesives, avoiding scratches, and achieving simple and efficient processes. Satisfy the effect of thinning

Active Publication Date: 2018-10-16
HEFEI LUCKY SCI & TECH IND +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Patent CN103149610B discloses a multi-layer composite prism sheet, which combines the upper prism sheet and the lower prism sheet with an adhesive, but it needs to prepare the upper prism sheet and the lower prism sheet respectively, and then coat the upper prism sheet A layer of adhesive, and then use a compound roller to compound the upper and lower prism sheets. This preparation method is more complicated, the process is cumbersome, and it needs to be rewound and unrolled many times, and the adhesive is transparent, which is not easy to cover the prism. Flaws and defects on the surface of the membrane
In addition, the description of the adhesive in this method is not detailed enough, and the use of this adhesive may affect optical properties such as light transmittance and brightness

Method used

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  • A kind of base film for prism composite film
  • A kind of base film for prism composite film
  • A kind of base film for prism composite film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041]16.99g polyester acrylate oligomer (functionality is 3, Changxing Chemical Material Co., Ltd., trade name: 6340N), 5g phenolic modified epoxy resin (Jiangsu Sanmu Group, trade name: F51), 5g amine curing agent (alicyclic polyamines, Jiangsu Sanmu Group, trade name: SM211), 3g photoinitiator (manufactured by Tianjin Tianjiao Chemical Co., Ltd., trade name: 184), 0.1g leveling aid (acrylic acid, BYK Chemicals) -350), 0.01 g of organic particles (polystyrene PS, with a particle size of 6 μm) and 70 g of toluene were placed in a stirring pot, and the coating liquid was obtained after stirring evenly.

[0042] The coating solution was coated on one surface of a PC film with a thickness of 23 μm, and cured in an oven at 60° C. for 1.5 minutes to obtain a base film for a prism composite film. Wherein, the coating thickness of the thermally cured diffuse reflection layer is 5 μm, the curing degree is 50%, and the haze is 1%. The evaluation results are listed in Table 1.

Embodiment 2

[0044] 25g polyester acrylate oligomer (functionality is 4, Changxing Chemical Material Co., Ltd., trade name: 6321-100), 75g phenolic modified epoxy resin (Jiangsu Sanmu Group, trade name: F53), 15g amines Curing agent (alicyclic polyamines, Jiangsu Sanmu Group, trade name: SM208), 10g photoinitiator (manufactured by Tianjin Tianjiao Chemical Co., Ltd., trade name: 1173), 2g leveling aid (acrylic acid, BYK Chemicals BYK -352), 1 g of organic particles (polymethyl methacrylate PMMA, particle size 20 μm) and 40 g of methyl ethyl ketone were placed in a stirring pot, and the coating liquid was obtained after stirring evenly.

[0045] The coating solution was coated on one side of a PET film with a thickness of 100 μm, and thermally cured in an oven at 80° C. for 0.6 min to obtain a base film for a prism composite film. Wherein, the coating thickness of the thermally cured diffuse reflection layer is 15 μm, the curing degree is 70%, and the haze is 10%. The evaluation results ar...

Embodiment 3

[0047] 15g polyester acrylate oligomer (functionality is 6, Changxing Chemical Material Co., Ltd., trade name: 6311-100), 16g phenolic modified epoxy resin (Jiangsu Sanmu Group, trade name: F44), 7g amine Curing agent (alicyclic polyamines, Jiangsu Sanmu Group, trade name: SM218), 5g photoinitiator (manufactured by Tianjin Tianjiao Chemical Co., Ltd., trade name: TPO), 0.2g leveling aid (acrylic acid, BYK chemical BYK-354), 0.1 g of organic particles (polybutyl methacrylate PBMA, particle size of 10 μm) and 56.70 g of ethyl acetate were placed in a stirring pot, and the coating liquid was obtained after stirring evenly.

[0048] The coating solution was coated on one side of a PMMA film with a thickness of 50 μm, and cured in an oven at 65° C. for 1.2 minutes to obtain a base film for a prism composite film. Wherein, the coating thickness of the thermally cured diffuse reflection layer is 8 μm, the curing degree is 55%, and the haze is 3%. The evaluation results are listed in...

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Abstract

A basal film used for a prism composite film comprises a support body and a diffuse reflection layer coated on a support body surface. The diffuse reflection layer is formed through solidifying a coating liquid. The coating liquid is made of polyester acrylate oligomer, modified phenolic epoxy resin, an amine curing agent, a photoinitiator, a leveling agent, an organic particle and an organic solvent. The diffuse reflection layer possesses certain viscidity, a curing degree is 50%-70% and a haze degree is 1%-10%. The basal film used for the prism composite film is suitable for the backlight composite film field and can be used to effectively bond other optical film sheets. Scratches of the optical film sheets, which are generated during mutual movements of the optical film sheets, can be effectively avoided, and a problem that dust and impurities are easy to enter into the film sheets can be prevented.

Description

technical field [0001] The invention relates to the technical field of backlight modules for LCDs, in particular to a base film for a prism composite film. 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 of thinner and lighter liq...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B5/02
CPCG02B5/0231
Inventor 李恒崔书海刘玉磊朱用国
Owner HEFEI LUCKY SCI & TECH IND
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