CN110819246A

CN110819246A - Curved screen protection film

Info

Publication number: CN110819246A
Application number: CN201911177956.8A
Authority: CN
Inventors: 华路; 朱伟建; 刘艳山
Original assignee: Heyuan Xuan Long Optoelectronic Technology Co Ltd
Current assignee: Heyuan Xuan Long Optoelectronic Technology Co Ltd
Priority date: 2019-11-27
Filing date: 2019-11-27
Publication date: 2020-02-21
Also published as: CN114181635A

Abstract

The invention discloses a curved screen protective film. The curved screen protective film comprises a base material, and a self-repairing layer and a blue-light-proof layer which are respectively connected with two opposite surfaces of the base material; the base material is one of TPU base material, PVC base material, PP base material and EVA base material; the self-repairing layer is formed by coating a self-repairing material, and the blue light preventing layer is formed by coating a blue light preventing material; the self-repairing material comprises the following components in parts by weight: nano silicon dioxide, ester substances, silicate, nano calcium, solvent and auxiliary agent; the blue-light-proof material comprises the following components in parts by weight: azophenyl methacrylate, ethyl isopropacrylate phenyl 2H-benzotriazole, azo compounds, solvents and auxiliaries. The curved screen protective film has good blue light prevention effect, can prevent white edges and yellow edges, and can be pasted with a wide screen.

Description

Curved screen protection film

Technical Field

The invention relates to the technical field of electronic product protective films, in particular to a curved screen protective film.

Background

With the rapid development of electronic products, electronic products such as tablet computers, notebooks, mobile phones and the like become an indispensable part of our lives. At present, 2.5D and 3D curved glass screens are mainstream in touch of mobile phone screens and electronic display markets, curved glass screens with different degrees are massively launched by taking iPhone8, Samsung Galaxy, Huawei and OPPO as precedents, the aesthetic fatigue of consumers on straight touch screens is broken, and the curved glass screens also become mainstream of product innovation and touch screen markets of large brand merchants in the future.

However, the vision problem is also highlighted unconsciously while enjoying the pleasure of life due to the development of science and technology. The appearance of symptoms such as dry eyes, hypopsia and the like is closely related to a large amount of irregular short-wave blue light emitted by a screen of an LCD module of an electronic product. The wavelength of the blue light in visible light is closest to that of ultraviolet light, the wavelength range of the blue light is 400nm-450nm, the blue light wave band can penetrate through crystalline lens and directly reach retina, the human eye injury is large, and the human body injury is also caused.

The influence of blue light on human is mainly determined by the following aspects: 1. this damage is irreversible and can cause atrophy and even death of the retinal pigment epithelium, leading to decreased or even complete loss of vision. 2. The yellow spot is diseased, the cataract is formed by gradual turbidity, most of blue light can penetrate through the crystalline lens, and especially for children, the crystalline lens is clear and cannot effectively resist the blue light, so that the yellow spot and the cataract are more easily caused. 3. It is easy to cause asthenopia. 4. Affecting sleep.

At present, a protective film for preventing blue light is adopted to intercept the blue light to prevent the blue light from causing irreversible damage to human eyes. The protective film that plane glass screen adopted includes transparent PET substrate, PU glues protection film, silica gel protection film and ya keli protection film. However, the conventional plane glass protective film does not have the bending property, and cannot be attached to the curved arc part of the curved screen, so that the touch screen or the display module cannot be comprehensively protected. In recent two years, protection film manufacturers have proposed 2.5D and 3D PET protection films with blue-light-proof PET which can be hot-bent. However, the product has white edges and yellowing at bent parts, scratches are easy to generate, and the blue light prevention effect of the product cannot meet the requirement.

Disclosure of Invention

Therefore, the invention needs to provide a curved screen protective film which has a good blue light prevention effect, can prevent white edges and yellow edges, can be pasted with a wide screen and has a self-repairing function.

In order to realize the purpose of the invention, the invention adopts the following technical scheme:

a curved screen protective film comprises a base material, and a self-repairing layer and a blue-light-proof layer which are respectively connected with two opposite surfaces of the base material; the base material is one of TPU base material, PVC base material, PP base material and EVA base material; the self-repairing layer is formed by coating a self-repairing material, and the blue light preventing layer is formed by coating a blue light preventing material; the self-repairing material comprises the following components in parts by weight: nano silicon dioxide, ester substances, silicate, nano calcium, solvent and auxiliary agent; the blue-light-proof material comprises the following components in parts by weight: azophenyl methacrylate, ethyl isopropacrylate phenyl 2H-benzotriazole, azo compounds, solvents and auxiliaries.

The curved screen protective film adopts the base material with small rebound stress, good tensile rate, high transparency and strong buffer force, and other materials are coated on the base material, so that the formed protective film has good overall bending property, can be adhered to the curved screen to be used as the protective film of the curved screen, and can reduce the occurrence of white edges and yellowing; the blue light prevention material made of the nano material can effectively absorb over 65 percent of strong blue light, can effectively protect eyes, solves the threat of the blue light to human eyesight and achieves the function of protecting eyes in full screen; the self-repairing layer is made of nano materials, has quick self-repairing capability, can self-repair scratches, prevent cracking and achieve the functions of explosion prevention and dirt prevention; therefore, the curved screen protective film can be completely attached to the curved screen without warping, and the curved screen protective film can protect the curved screen.

In some embodiments, a first primer layer is further disposed between the self-repairing layer and the substrate, and a second primer layer is further disposed between the anti-blue layer and the substrate.

In some embodiments, the substrate has a thickness of 100 μm to 125 μm, the self-repairing layer has a thickness of 15 μm to 20 μm, and the blue light prevention layer has a thickness of 5 μm to 10 μm.

In some embodiments, a first adhesive layer, a release agent layer and a first PET film layer are further disposed on one surface of the blue light prevention layer, which is far away from the substrate.

In some embodiments, a second glue layer and a second PET film layer are further disposed on a surface of the self-repairing layer away from the substrate.

In some embodiments, the thickness of the first PET film layer is 100 μm to 125 μm, the thickness of the release agent layer is 0.5 μm to 1.5 μm, the thickness of the first glue layer is 22 μm to 28 μm, the thickness of the blue light prevention layer is 5 μm to 10 μm, the thickness of the substrate is 100 μm to 125 μm, the thickness of the self-repairing layer is 15 μm to 20 μm, the thickness of the second glue layer is 10 μm to 15 μm, and the thickness of the second PET film layer is 48 μm to 55 μm.

In some embodiments, the self-repairing material comprises the following components in parts by weight: 30-35 parts of nano silicon dioxide, 60-80 parts of ester substances, 18-27 parts of silicate, 1-2 parts of nano calcium, 40-75 parts of solvent and a proper amount of auxiliary agent.

In some embodiments, the self-repairing material comprises the following components in parts by weight: 30-35 parts of nano silicon dioxide, 30-40 parts of acrylic resin, 30-40 parts of modified polyisocyanate, 18-27 parts of hydroxyl silicate, 1-2 parts of nano calcium carbonate or nano calcium hydroxide, 1-5 parts of ethyl acetate, 5-15 parts of tert-butyl alcohol, 30-40 parts of butyl acetate, 5-15 parts of acetylacetone and a proper amount of auxiliary agent.

In some embodiments, the blue-light-proof material comprises the following components in parts by weight: 50-60 parts of azo phenyl methacrylate, 20-25 parts of ethyl methacrylate phenyl 2H-benzotriazole, 10-15 parts of azo compounds, 30-40 parts of solvent and a proper amount of auxiliary agent.

In some embodiments, the preparation methods of the self-repairing material and the blue-light-proof material are as follows: mixing the raw materials except the auxiliary agent, slowly adding the auxiliary agent after stirring, stirring again, removing a large amount of bubbles generated in the stirring process by utilizing vacuum pumping, and standing.

Drawings

FIG. 1 is a schematic structural view of a curved surface screen protective film according to an embodiment of the present invention;

FIG. 2 is a schematic structural view of a curved surface screen protective film according to another embodiment of the present invention;

FIG. 3 is a schematic structural view of a curved surface screen protective film according to another embodiment of the present invention.

Detailed Description

In order that the invention may be more fully understood, reference will now be made to the following description. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

Referring to fig. 1, the present invention provides a curved screen protective film 100 for attaching to a curved screen to protect the curved screen, the curved screen protective film 100 including a substrate 10, and a self-repairing layer 20 and a blue light prevention layer 30 respectively connected to opposite sides of the substrate 10; the base material 10 is one of a TPU base material, a PVC base material, a PP base material and an EVA base material; the self-repairing layer 20 is formed by coating a self-repairing material, and the blue light preventing layer 30 is formed by coating a blue light preventing material; the self-repairing material comprises the following components in parts by weight: nano silicon dioxide, ester substances, silicate, nano calcium, solvent and auxiliary agent; the blue-light-proof material comprises the following components in parts by weight: azophenyl methacrylate, ethyl isopropacrylate phenyl 2H-benzotriazole, azo compounds, solvents and auxiliaries.

The base material 10 is preferably a TPU base material, which has good bending performance, small rebound stress, good tensile rate, high transparency, strong buffer capacity and good adhesion, and the thickness of the TPU base material is 100-125 μm. The substrate 10 may be coated with the self-healing layer 20 and the blue-light blocking layer 30 after being subjected to dust removal, corona, static electricity removal, and the like.

The self-repairing layer 20 has a quick second repairing effect on scratches after being used for repairing the protective film, has a smooth surface and good hand feeling, prevents fingerprint prints and prevents dirt, and enables the service life of the protective film to be longer. The self-repairing layer 20 is made of nano materials, and has good scratch repairing and slipping effects.

For example, the self-repairing material comprises the following components in parts by weight: 30-35 parts of nano silicon dioxide, 60-80 parts of ester substances, 18-27 parts of silicate, 1-2 parts of nano calcium, 40-75 parts of solvent and a proper amount of auxiliary agent.

Further, the self-repairing material comprises the following components in parts by weight: 30-35 parts of nano silicon dioxide, 30-40 parts of acrylic resin, 30-40 parts of modified polyisocyanate, 18-27 parts of hydroxyl silicate, 1-2 parts of nano calcium carbonate or nano calcium hydroxide, 1-5 parts of ethyl acetate, 5-15 parts of tert-butyl alcohol, 30-40 parts of butyl acetate, 5-15 parts of acetylacetone and a proper amount of auxiliary agent.

The silicate is hydroxyl silicate, is modified silicate, has excellent wear resistance, lubrication function and self-repairing function, and can enable the self-repairing material to have good wear resistance, lubrication function and self-repairing function by matching with other components. For example, the hydroxy silicate includes 10-15 parts of magnesium hydroxy silicate and 8-12 parts of aluminum hydroxy silicate. Of course, other hydroxy silicates may be used.

The solvent is prepared by matching ethyl acetate, tert-butyl alcohol, butyl acetate and acetylacetone, and can be used for dissolving each raw material in a targeted manner, so that the dissolution is more sufficient, and the raw materials are dispersed more uniformly. Of course, the solvent can be mixed together with other solvents, or a single solvent can be used, and the selection of the solvent is not limited to the formula, but the dissolving effect is not good when the solvent is used.

The auxiliary agent can comprise a cross-linking agent, a catalyst, a reactive diluent, an anti-settling agent, an adhesion promoter, a dispersing agent, a corrosive agent and the like, and one or more of the auxiliary agents can be selected according to raw material requirements. Preferably, all of the above-mentioned auxiliaries are added. For example, 10 to 20 portions of reactive diluent, 0.2 to 2 portions of anti-settling agent, 0.2 to 8 portions of adhesion promoter, 1 to 2 portions of dispersant, 0.3 to 1.2 portions of corrosion inhibitor, 0.6 to 0.8 portion of cross-linking agent and 0.1 to 0.3 portion of catalyst. The addition of the auxiliary agent according to the proportion can enable the self-repairing material to have good adhesive force, dispersibility, corrosion resistance, sinking resistance and the like.

The preparation method of the self-repairing material comprises the following steps: the raw materials are dispersed and polymerized by a high-pressure reaction kettle.

Specifically, the preparation method of the self-repairing material comprises the following steps: mixing the main raw materials except the auxiliary agent and the solvent in a high-pressure reaction kettle, stirring for 15min, slowly adding the auxiliary agent such as a cross-linking agent, a catalyst and the like, stirring for 10min, then pumping a large amount of bubbles generated in the coating liquid in the stirring process by using a vacuum pumping principle, standing for 20min for defoaming, and obtaining the self-repairing material, wherein the self-repairing material can be directly coated on the substrate 10. The preparation method greatly reduces the adverse phenomena of uneven coating surface, concave-convex points and the like caused by the influence of bubbles in the coating liquid on coating, obviously improves the appearance of the coating, and can greatly improve the yield of finished products.

The thickness of the self-healing layer 20 is 15 μm to 20 μm. The thickness of the protective film is adopted, so that the manufactured protective film has better optical transmittance and refractivity.

The blue-light-proof material comprises the following components in parts by weight: 50-60 parts of azo phenyl methacrylate, 20-25 parts of ethyl methacrylate phenyl 2H-benzotriazole, 10-15 parts of azo compounds, 60-80 parts of solvent and a proper amount of auxiliary agent.

The solvent may comprise 30-40 parts of ethyl acetate and 30-40 parts of butyl acetate. The solvent proportion can better dissolve the raw materials, and can volatilize in stages, thereby achieving better dissolving effect.

The auxiliary agent can comprise a catalyst, a cross-linking agent, a reactive diluent, an anti-settling agent, an adhesion promoter, a dispersing agent, an anti-corrosion agent and the like, and one or more of the auxiliary agents can be selected according to raw material requirements. Preferably, an adhesion promoter is added into the blue light prevention material. For example, 0.2 to 8 portions of adhesion promoter, 0.3 to 1.2 portions of corrosion inhibitor, 0.6 to 0.8 portion of cross-linking agent, 0.1 to 0.3 portion of catalyst, 10 to 20 portions of reactive diluent, 0.2 to 2 portions of anti-settling agent and 1 to 2 portions of dispersant.

Specifically, the preparation method of the blue light prevention material comprises the following steps: mixing the main raw materials except the auxiliary agent and the solvent in a high-pressure reaction kettle, slowly adding the auxiliary agent after stirring, stirring for a period of time, pumping away a large amount of bubbles generated in the coating liquid in the stirring process by utilizing the vacuum pumping principle, standing for 20min for defoaming to obtain the blue-light-proof material, and at the moment, directly coating the blue-light-proof material on the substrate 10. The preparation method greatly reduces the adverse phenomena of uneven coating surface, concave-convex points and the like caused by the influence of bubbles in the coating liquid on coating, obviously improves the appearance of the coating, and can greatly improve the yield of finished products.

The thickness of the blue-light preventing layer 30 is 5 μm to 10 μm. The thickness of the protective film is adopted, so that the manufactured protective film has better optical transmittance and refractivity.

Referring to fig. 2, a first primer layer 40 is further disposed between the self-repairing layer 20 and the TPU substrate 10, and a second primer layer 50 is further disposed between the blue light-proof layer 30 and the TPU substrate 10.

The primer is coated on the surface of the TPU substrate 10, can quickly and fully enter molecular holes on the surface of the TPU, and is tightly occluded with the TPU to form a whole which is difficult to separate. The primer can increase the adhesion between TPU and the coating, and greatly increase the reliability of aging resistance and non-separation of the coating.

The materials used for the first primer layer 40 and the second primer layer 50 may be the same or different. The purposes are to increase the adhesive force and resist aging. For example, the first primer layer 40 and the second primer layer 50 are each composed of a chlorinated polyolefin, an adhesion promoter, and other auxiliaries.

Referring to fig. 3, a second adhesive layer 60 and a second PET film layer 70 are further disposed on a side of the self-repairing layer 20 away from the TPU substrate. The self-healing layer 20 may be protected with a second PET film layer 70. For example, the second adhesive layer 60 is formed by coating a silicone-based adhesive.

In one embodiment, the thickness of the self-repairing layer 20 is 15 μm to 20 μm, the thickness of the second glue layer 60 is 10 μm to 15 μm, and the thickness of the second PET film layer 70 is 48 μm to 55 μm. The thickness can be matched with the thicknesses of the self-repairing layer 20 and the TPU substrate 10, so that the manufactured protective film has better optical transmittance and self-repairing property.

Further, one side of the blue light prevention layer 30, which is far away from the TPU substrate 10, is further provided with a first glue layer 80, a release agent layer 90 and a first PET film layer 101. The first glue layer 80 is protected and isolated by a release agent layer 90 and a first PET film layer 101. When the curved screen is used, the release agent layer 90 and the first PET film layer 101 are removed, and the first adhesive layer 80 is directly adhered to the curved screen.

Preferably, the first adhesive layer 80 is made of an optical high-transmittance pressure-sensitive adhesive, a silicone adhesive, an acrylic adhesive system or a hybrid adhesive. The first adhesive layer 80 is ensured to have better adhesion with the screen.

In one embodiment, the thickness of the first PET film layer 101 is 100 μm to 125 μm, and the thickness of the release agent layer 90 is 0.5 μm to 1.5 μm. The thickness can be matched with the blue light prevention layer 30, the TPU substrate 10 and the thickness of the first glue layer 80, so that the manufactured protective film has good optical transmittance and good adhesion to the curved screen.

The present invention also provides a method for preparing the curved surface screen protective film 100, comprising the following steps:

sequentially carrying out unreeling, primary dust removal, corona, static electricity removal and secondary dust removal on the TPU substrate;

and respectively coating a blue light prevention material and a self-repairing material on two sides of the TPU substrate, and drying to obtain the TPU substrate.

If the base coating is contained, before the blue-light-proof material and the self-repairing material are coated, the base coating material is respectively coated on two sides of the TPU substrate, and then the blue-light-proof material and the self-repairing material are coated on the base coating material.

The static electricity removing method comprises the following steps:

hanging a conductive wire cloth belt above a material placing frame, wherein the conductive wire cloth belt is lapped on the surface of a base material and is connected with a special copper wire for static conduction, and the conductive wire cloth can directly conduct static on the surface of the base material during production;

secondly, arranging a static removing rope at the position 5mm-8mm away from the surface of the material above and below a guide roller through which the base material passes, wherein two ends of the static removing rope are connected with a special static conducting copper wire, so that static can be directly conducted away on the surface of the base material during production;

and thirdly, mounting negative ion wind static electricity removing equipment at the position where the base material is easy to generate the maximum static electricity, and quickly and effectively absorbing the static electricity on the base material and the dust on the surface.

The method can eliminate the static electricity by 99 percent, effectively and thoroughly remove the static electricity and dust generated by the operation of the base material or the machine table in time, greatly reduce the production safety risk caused by the static electricity, and simultaneously reduce a series of bad coating such as crystal points, particles, lines and the like caused by the static electricity, thereby improving the production safety and the product yield.

Further, the substrate is preheated in an environment of 40 ℃ to 50 ℃ before the primer is coated, so that the substrate has a temperature of 40 ℃ to 50 ℃. After the base coating material is coated on the base material, the viscosity of the base coating material can be greatly reduced at high temperature, the fluidity and the wettability are increased, the base coating material can quickly and fully enter the base material and can be meshed with the base material together to form a whole body which is not easy to separate, so that the adhesive force of the base coating material and the base material is increased, and after the blue-light-proof material and the self-repairing material are coated, the aging-resistant and non-separation reliability of the coating is greatly increased.

Embodiments of the present invention will be illustrated by the following examples.

Example one

In the embodiment, the self-repairing material comprises the following components in parts by weight: the self-repairing material is prepared from the following components in parts by weight: 32 parts of nano silicon dioxide, 35 parts of acrylic resin, 35 parts of modified polyisocyanate, 12 parts of magnesium hydroxy silicate, 10 parts of aluminum hydroxy silicate, 1.5 parts of nano calcium carbonate, 3 parts of ethyl acetate, 10 parts of tert-butyl alcohol, 35 parts of butyl acetate, 12 parts of acetylacetone, 15 parts of reactive diluent, 1 part of anti-settling agent, 5 parts of adhesion promoter, 1.5 parts of dispersing agent and 0.8 part of anticorrosive agent. The blue-light-proof material is prepared from the following components in parts by weight: 55 parts of azo phenyl methacrylate, 22 parts of ethyl isopropacrylate phenyl 2H-benzotriazole, 12 parts of azo compounds, 35 parts of ethyl acetate, 35 parts of butyl acetate and 5 parts of adhesion promoter.

Example two

In the embodiment, the self-repairing material comprises the following components in parts by weight: the self-repairing material is prepared from the following components in parts by weight: 35 parts of nano silicon dioxide, 40 parts of acrylic resin, 40 parts of modified polyisocyanate, 15 parts of magnesium hydroxy silicate, 12 parts of aluminum hydroxy silicate, 2 parts of nano calcium carbonate, 5 parts of ethyl acetate, 15 parts of tert-butyl alcohol, 40 parts of butyl acetate, 15 parts of acetylacetone, 20 parts of reactive diluent, 2 parts of anti-settling agent, 8 parts of adhesion promoter, 2 parts of dispersing agent and 1.2 parts of anti-corrosion agent. The blue-light-proof material is prepared from the following components in parts by weight: 60 parts of azo phenyl methacrylate, 25 parts of ethyl isopropacrylate phenyl 2H-benzotriazole, 15 parts of azo compounds, 40 parts of ethyl acetate, 40 parts of butyl acetate and 8 parts of adhesion promoter.

EXAMPLE III

In the embodiment, the self-repairing material comprises the following components in parts by weight: the self-repairing material is prepared from the following components in parts by weight: 30 parts of nano silicon dioxide, 30 parts of acrylic resin, 30 parts of modified polyisocyanate, 10 parts of magnesium hydroxy silicate, 8 parts of aluminum hydroxy silicate, 1 part of nano calcium carbonate, 1 part of ethyl acetate, 5 parts of tert-butyl alcohol, 30 parts of butyl acetate, 5 parts of acetylacetone, 10 parts of reactive diluent, 0.2 part of anti-settling agent, 0.2 part of adhesion promoter, 1 part of dispersing agent and 0.3 part of corrosion inhibitor. The blue-light-proof material is prepared from the following components in parts by weight: 50 parts of azo phenyl methacrylate, 20 parts of ethyl isopropacrylate phenyl 2H-benzotriazole, 10 parts of azo compounds, 30 parts of ethyl acetate, 30 parts of butyl acetate and 0.2 part of adhesion promoter.

Example four

In the embodiment, the self-repairing material comprises the following components in parts by weight: the self-repairing material is prepared from the following components in parts by weight: 32 parts of nano silicon dioxide, 35 parts of acrylic resin, 35 parts of modified polyisocyanate, 20 parts of hydroxy aluminum silicate, 1.5 parts of nano calcium carbonate, 3 parts of ethyl acetate, 10 parts of tertiary butanol, 35 parts of butyl acetate, 12 parts of acetylacetone, 15 parts of reactive diluent, 5 parts of adhesion promoter, 1.5 parts of dispersant and 0.8 part of corrosion inhibitor. The blue-light-proof material is prepared from the following components in parts by weight: 55 parts of azo phenyl methacrylate, 22 parts of ethyl isopropacrylate phenyl 2H-benzotriazole, 12 parts of azo compounds, 35 parts of ethyl acetate, 35 parts of butyl acetate, 1.5 parts of dispersing agent, 0.8 part of corrosion inhibitor and 5 parts of adhesion promoter.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. The curved screen protective film is characterized by comprising a base material, and a self-repairing layer and a blue-light prevention layer which are respectively connected with two opposite surfaces of the base material; the base material is one of TPU base material, PVC base material, PP base material and EVA base material; the self-repairing layer is formed by coating a self-repairing material, and the blue light preventing layer is formed by coating a blue light preventing material; the self-repairing material comprises the following components in parts by weight: nano silicon dioxide, ester substances, silicate, nano calcium, solvent and auxiliary agent; the blue-light-proof material comprises the following components in parts by weight: azophenyl methacrylate, ethyl isopropacrylate phenyl 2H-benzotriazole, azo compounds, solvents and auxiliaries.

2. The curved screen protective film of claim 1, wherein a first primer layer is further disposed between the self-repairing layer and the substrate, and a second primer layer is further disposed between the anti-blue layer and the substrate.

3. The curved screen protective film of claim 1, wherein the substrate has a thickness of 100-125 μ ι η, the self-repair layer has a thickness of 15-20 μ ι η, and the anti-blue layer has a thickness of 5-10 μ ι η.

4. The curved screen protection film as claimed in claim 1, wherein a first glue layer, a release agent layer and a first PET film layer are further disposed on a surface of the blue light prevention layer away from the substrate.

5. The curved screen protection film of claim 4, wherein a second glue layer and a second PET film layer are further disposed on a surface of the self-repairing layer away from the substrate.

6. The curved screen protective film according to claim 5, wherein the first PET film layer has a thickness of 100-125 μm, the release agent layer has a thickness of 0.5-1.5 μm, the first glue layer has a thickness of 22-28 μm, the anti-blue layer has a thickness of 5-10 μm, the substrate has a thickness of 100-125 μm, the self-repairing layer has a thickness of 15-20 μm, the second glue layer has a thickness of 10-15 μm, and the second PET film layer has a thickness of 48-55 μm.

7. The curved screen protection film of claim 1, wherein the self-healing material comprises the following components in parts by weight: 30-35 parts of nano silicon dioxide, 60-80 parts of ester substances, 18-27 parts of silicate, 1-2 parts of nano calcium, 40-75 parts of solvent and a proper amount of auxiliary agent.

8. The curved screen protection film of claim 7, wherein the self-healing material comprises the following components in parts by weight: 30-35 parts of nano silicon dioxide, 30-40 parts of acrylic resin, 30-40 parts of modified polyisocyanate, 18-27 parts of hydroxyl silicate, 1-2 parts of nano calcium carbonate or nano calcium hydroxide, 1-5 parts of ethyl acetate, 5-15 parts of tert-butyl alcohol, 30-40 parts of butyl acetate, 5-15 parts of acetylacetone and a proper amount of auxiliary agent.

9. The curved screen protective film of claim 1, wherein the blue light blocking material comprises the following components in parts by weight: 50-60 parts of azo phenyl methacrylate, 20-25 parts of ethyl methacrylate phenyl 2H-benzotriazole, 10-15 parts of azo compounds, 30-40 parts of solvent and a proper amount of auxiliary agent.

10. The curved screen protection film of claim 1, wherein the self-repairing material and the blue light-proof material are prepared by the following steps: mixing the raw materials except the auxiliary agent, slowly adding the auxiliary agent after stirring, stirring again, removing a large amount of bubbles generated in the stirring process by utilizing vacuum pumping and pressure, and standing.