Preparation method of screen protection film and corresponding screen protection film

Abstract

The invention relates to the technical field of optical illumination, in particular to a preparation method of a screen protection film and a corresponding screen protection film. The method at least comprises the following steps of 1, adding bonding agents and ultraviolet / blue light absorption agents into a first organic solvent to obtain surface paint; 2, coating the surface paint onto the surface of a polyester film to form a coating; curing the coating to obtain a base film; 3, respectively compounding release films on the two sides of the base film to obtain the screen protection film. The method provided by the invention has the advantages that the single addition of acrylic ester bonding agents is not needed; the obtained protection film has good absorption performance on ultraviolet light and blue light; meanwhile, most visible light can be transmitted; in addition, the final product is white; the color developing performance is not influenced.

Description

technical field

[0001] The present application relates to the technical field of optical lighting, in particular, to a method for preparing a screen protection film and a corresponding screen protection film. Background technique

[0002] Many users will stick film on their purchased laptops or mobile phones. At present, functional screen protectors basically have a multi-layer structure, and the manufacturing process is complicated and the cost is high. Especially for the blue light absorbing film with eye protection function, the blue light absorber must be combined in the middle of the two-layer biaxially oriented polyester film (BOPET) film, and the acrylate binder used cannot be added at the same time as the blue light absorber, otherwise It cannot be cured due to the interference of the active groups of the blue light absorber on the acrylate binder. In addition, the surface needs to be hardened, and the products are mostly yellow, which affects the color rendering. ...

Examples

preparation example Construction

[0039] The application relates to a method for preparing a screen protective film, at least comprising the following steps:

[0040] Step 1, adding a binder and an ultraviolet / blue light absorber to the first organic solvent to obtain a surface coating;

[0041] Step 2, coating the surface coating on the surface of the polyester film to form a coating, and curing the coating to obtain a base film; and

[0042] Step 3: Composite release films on both sides of the base film to obtain the screen protection film of the present application.

[0043] As an improvement to the preparation method of the screen protective film of the present application, the first organic solvent is selected from at least one of aromatic hydrocarbons, esters, and ketones, the aromatic ester solvent is preferably selected from toluene, xylene, and the ketone solvent is preferably selected from acetone, cyclic Hexanone and ester solvents are preferably selected from methyl formate and ethyl acetate. The...

Embodiment 1、2、3、5、6

[0066] Step 1. Add 20-40g of thermosetting acrylate to 100g of mixed solvent of xylene and ethyl acetate (the volume ratio of the two is 2:1-3:1) as a binder to dissolve, and then add a solid content of 40-60 5-10g of ultraviolet / blue light absorber, 0-5g of oil-soluble transparent violet dye, and 0-8g of oil-soluble transparent blue dye to obtain a mixed liquid.

[0067] Step 2, the particle size is 20 ~ 30nm nano-SiO 2 Disperse in xylene to obtain a dispersion liquid with a solid content of 40-50% by weight, and the dispersion liquid also contains 3-7% by weight of D3F. Add 10-20g of the dispersion liquid to the above mixed liquid to obtain a functional surface coating.

[0068] Step 3. Apply the obtained surface coating on the surface of an optical-grade PET film with a thickness of 170-190 microns to form a coating. Curing for 30-40 minutes to obtain a base film.

[0069] Step 4: Composite release films with a peel strength of 3-10g on both sides of the obtained base fi...

Embodiment 4

[0071] Steps 1, 3, and 4 are the same as in Example 1, except that the mixed solution obtained in step 1 is directly transferred to step 3, and the obtained mixed solution is used as a surface coating and coated on the surface of an optical-grade PET film to form a coating.

[0072] In Examples 1-6, the first solvent used, adhesive, UV / blue light absorber, oil-soluble transparent violet dye, oil-soluble transparent blue dye, the release film peeling force are as shown in Table 1, UV / Among the blue light absorbers, the types of rare earth oxides, second solvent, particle size distribution, and solid content are shown in Table 2. Nano-SiO 2 The particle size, solids weight content, D3F weight content, and dispersion liquid consumption are shown in Table 3.

[0073] Table 1

[0074]

[0075]

[0076] Table 2

[0077]

[0078]

[0079] table 3

[0080]

[0081] Note: "\" indicates that no substance was added.

[0082] The prepared screen protective film is test...

technical field

[0001] The present application relates to the technical field of optical lighting, in particular, to a method for preparing a screen protection film and a corresponding screen protection film. Background technique

[0002] Many users will stick film on their purchased laptops or mobile phones. At present, functional screen protectors basically have a multi-layer structure, and the manufacturing process is complicated and the cost is high. Especially for the blue light absorbing film with eye protection function, the blue light absorber must be combined in the middle of the two-layer biaxially oriented polyester film (BOPET) film, and the acrylate binder used cannot be added at the same time as the blue light absorber, otherwise It cannot be cured due to the interference of the active groups of the blue light absorber on the acrylate binder. In addition, the surface needs to be hardened, and the products are mostly yellow, which affects the color rendering. ...

Examples

preparation example Construction

[0039] The application relates to a method for preparing a screen protective film, at least comprising the following steps:

[0040] Step 1, adding a binder and an ultraviolet / blue light absorber to the first organic solvent to obtain a surface coating;

[0041] Step 2, coating the surface coating on the surface of the polyester film to form a coating, and curing the coating to obtain a base film; and

[0042] Step 3: Composite release films on both sides of the base film to obtain the screen protection film of the present application.

[0043] As an improvement to the preparation method of the screen protective film of the present application, the first organic solvent is selected from at least one of aromatic hydrocarbons, esters, and ketones, the aromatic ester solvent is preferably selected from toluene, xylene, and the ketone solvent is preferably selected from acetone, cyclic Hexanone and ester solvents are preferably selected from methyl formate and ethyl acetate. The...

Embodiment 1、2、3、5、6

[0066] Step 1. Add 20-40g of thermosetting acrylate to 100g of mixed solvent of xylene and ethyl acetate (the volume ratio of the two is 2:1-3:1) as a binder to dissolve, and then add a solid content of 40-60 5-10g of ultraviolet / blue light absorber, 0-5g of oil-soluble transparent violet dye, and 0-8g of oil-soluble transparent blue dye to obtain a mixed liquid.

[0067] Step 2, the particle size is 20 ~ 30nm nano-SiO 2 Disperse in xylene to obtain a dispersion liquid with a solid content of 40-50% by weight, and the dispersion liquid also contains 3-7% by weight of D3F. Add 10-20g of the dispersion liquid to the above mixed liquid to obtain a functional surface coating.

[0068] Step 3. Apply the obtained surface coating on the surface of an optical-grade PET film with a thickness of 170-190 microns to form a coating. Curing for 30-40 minutes to obtain a base film.

[0069] Step 4: Composite release films with a peel strength of 3-10g on both sides of the obtained base fi...

Embodiment 4

[0071] Steps 1, 3, and 4 are the same as in Example 1, except that the mixed solution obtained in step 1 is directly transferred to step 3, and the obtained mixed solution is used as a surface coating and coated on the surface of an optical-grade PET film to form a coating.

[0072] In Examples 1-6, the first solvent used, adhesive, UV / blue light absorber, oil-soluble transparent violet dye, oil-soluble transparent blue dye, the release film peeling force are as shown in Table 1, UV / Among the blue light absorbers, the types of rare earth oxides, second solvent, particle size distribution, and solid content are shown in Table 2. Nano-SiO 2 The particle size, solids weight content, D3F weight content, and dispersion liquid consumption are shown in Table 3.

[0073] Table 1

[0074]

[0075]

[0076] Table 2

[0077]

[0078]

[0079] table 3

[0080]

[0081] Note: "\" indicates that no substance was added.

[0082] The prepared screen protective film is test...

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