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Protective film for optical thin films and method for preparing protective film

A technology of optical film and protective film, applied in the direction of film/sheet adhesive, adhesive type, polyurea/polyurethane adhesive, etc., can solve the problem of PE film thin scratch resistance, etc., to ensure smoothness Excellent scratch resistance and improved scratch resistance

Pending Publication Date: 2018-11-02
芜湖夏鑫新型材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional protective film mainly uses PE single-layer glued protective film. Its disadvantages are: PE film is thin and has poor scratch resistance.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] An optical film protective film, comprising a PE base film layer and an adhesive layer, the adhesive layer is formed by coating the surface of the PE base film layer with glue and drying, and the PE base film layer includes A layer and B layer, Layer A is a PE layer, and layer B is a PE layer added with 6% organic silicon with a particle size of 5-10 μm. Layer A and layer B form a PE base film layer by co-extrusion; the glue includes the following raw materials in parts by weight : 30 parts of poly-2-methyl methacrylate; 65 parts of ethyl acetate; 4.8 parts of hexamethylene diisocyanate; 0.8 parts of stearyl trimethyl quaternary ammonium hydrochloride.

[0024] The preparation method of the optical film protective film is as follows: according to the formula quantity, the raw materials are mixed evenly to prepare glue, and the glue is coated on the surface of the PE base film layer, and the process is successively passed through 75°C, 24Hz air volume; 85°C, 28Hz air volu...

Embodiment 2

[0027] An optical film protective film, comprising a PE base film layer and an adhesive layer, the adhesive layer is formed by coating the surface of the PE base film layer with glue and drying, and the PE base film layer includes A layer and B layer, Layer A is a PE layer, and layer B is a PE layer added with 5% silicon dioxide. Layer A and layer B form a PE-based film layer by co-extrusion; the glue includes the following raw materials in parts by weight: epoxy methyl acrylate 27 parts; 62 parts of ethyl acetate; 4 parts of diphenylmethane diisocyanate; 0.6 parts of monoglyceride stearate.

[0028] The preparation method of the optical film protective film is as follows: according to the formula quantity, the raw materials are mixed evenly to prepare glue, and the glue is coated on the surface of the PE base film layer, and the air flow is 70°C, 26Hz; 80°C, 30Hz; 85°C, 37Hz air volume, 85°C, 37Hz air volume; 75°C, 28Hz air volume oven for drying, the length of the ovens is 4...

Embodiment 3

[0031] An optical film protective film, comprising a PE base film layer and an adhesive layer, the adhesive layer is formed by coating the surface of the PE base film layer with glue and drying, and the PE base film layer includes A layer and B layer, Layer A is a PE layer, and layer B is a PE layer added with 8% PMMA. Layer A and layer B form a PE base film layer by co-extrusion; the glue includes the following raw materials in parts by weight: polyurethane acrylate 10, polyacrylic 25 parts of methyl acrylate; 68 parts of ethyl acetate; 2 parts of toluene diisocyanate, 3.4 parts of isophorone diisocyanate; 0.9 parts of alkyl dicarboxymethyl betaine.

[0032] The preparation method of the optical film protective film is as follows: according to the formula quantity, the raw materials are mixed evenly to prepare glue, and the glue is coated on the surface of the PE base film layer, and the air flow is 80°C, 228Hz; 90°C, 26Hz; 95°C, 33Hz air volume, 95°C, 33Hz air volume; 85°C, ...

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Abstract

The invention discloses a protective film for optical thin films and a method for preparing the protective film. The protective film comprises PE (polyethylene) base film layers and glue layers. Glueis coated on the surfaces of the PE base film layers and is dried to form the glue layers, the PE base film layers comprise layers A and layers B, the layers A are PE layers, the layers B are PE layers with added organic or inorganic particles, and the PE base film layers are formed from the layers A and the layers B by means of co-extrusion; the glue comprises, by weight, 26-36 parts of acrylateresin, 60-70 parts of ethyl acetate, 3-6 parts of isocyanate curing agents and 0.5-1 part of antistatic agents. The protective film and the method have the advantages that layer structures of the PE base film layers, raw materials and ratios for the glue and processes for preparing the protective film are comprehensively controlled, accordingly, the protective film which is excellent antistatic properties and scratch resistance, appropriate in stripping force and free of glue residues can be obtained, the impedance value of the protective film is within the range from 10<7> to 10<11>, and thestripping force of the protective film is 1.6-2.5 N / m.

Description

technical field [0001] The invention relates to an optical film protective film and a preparation method thereof. Background technique [0002] At present, the optical films used in the backlight module, such as the enhancement film, the diffusion film, etc., have relatively high requirements, and they need to be protected during their production, transportation, and cutting to avoid scratches and pollution. The traditional protective film mainly uses PE single-layer glued protective film. Its disadvantages are: the PE film is thin and has poor scratch resistance. Contents of the invention [0003] The purpose of the present invention is to provide a kind of optical film protective film and its preparation method. By adding organic or inorganic particles to the PE base film layer and coating the surface of the base film layer with a glue of a specific composition, the scratch resistance and antistatic performance of the protective film can be improved. [0004] The techn...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J7/29C09J7/30C09J175/04C09J11/06C08G18/62C08G18/73C08G18/75C08G18/76C08G18/34C08L23/06C08L33/12C08K3/36
CPCC08G18/34C08G18/6225C08G18/73C08G18/755C08G18/7671C08K3/36C08K2201/003C08L23/06C09J11/06C09J175/04C09J2467/006C09J2475/00C09J7/29C09J7/30C09J2301/312C09J2301/408C09J2301/41C08K5/19C08K5/103C08L75/14C08L33/12
Inventor 费志豪王陈
Owner 芜湖夏鑫新型材料科技有限公司
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