CN218174867U

CN218174867U - Photocuring protection film

Info

Publication number: CN218174867U
Application number: CN202222498573.4U
Authority: CN
Inventors: 蔡龙飞; 钱培栋; 宋宁; 汪金虎
Original assignee: Shanghai Meixin Times New Materials Co ltd; Meixin New Materials Co ltd
Current assignee: Shanghai Meixin Times New Materials Co ltd; Meixin New Materials Co ltd
Priority date: 2022-09-21
Filing date: 2022-09-21
Publication date: 2022-12-30
Anticipated expiration: 2032-09-21

Abstract

The utility model relates to a photocuring protection film, including protection film, sclerosis layer, CPI layer, the two cured layers of heat and light, silica gel layer and the layer of leaving of laminating in proper order, the upper surface of the two cured layers of heat and light is provided with first arch, the lower surface on CPI layer has the first sunken of matcing with first arch, when the two cured layers of heat and light laminate in CPI layer, first arch and the mutual interlock of first sunken. The utility model provides a photocuring protection film, CPI layer bottom coating thermophotonic pair of layers solidifies, through setting up the first arch and the first sunken of mutual interlock, plays the joint strength who strengthens CPI layer and the two layers of solidifying of thermophotonic, can also strengthen diffuse reflection simultaneously, alleviate surface reflection, the difficult reflection of light that takes place under the sunshine.

Description

Photocuring protective film

Technical Field

The utility model relates to a protection film field especially, especially relates to a photocuring protection film.

Background

The mobile phone factory releases the mobile phones with full screens, and the screen occupation ratio is higher and higher. Manufacturers at the present stage mostly adopt an optical biological identification technology for finger-print unlocking under the screen to ensure high-efficiency screen occupation ratio. Meanwhile, in order to improve user experience, curved surface products with slopes of 10-30 degrees on two sides are provided, and the user feels like naked eye 3D.

However, in the current market, a 3D photo-curing protective film for a curved screen is mostly prepared by coating a hardening liquid on one side of an optical PET film and coating a photo-curing adhesive and silica gel or a structure of the photo-curing adhesive plus a TPU film plus silica gel on the other side of the optical PET film. However, the 3D light-cured protective film with the PET film structure has a polarization angle due to the fact that PET is a biaxial stretching process, and if the film is not cut at a certain angle during die cutting, the polarization light transmittance of the film is reduced, so that the function of unlocking the lower finger prints of the optical screen is affected, and the material utilization rate is low. Although some manufacturers use the CPI layer to remove the polarization angle problem, the CPI layer is weak in connection strength with other layers, and loose information is likely to occur, so that improvement is needed.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model provides a photocuring protection film gets rid of the angle of polarization problem through the CPI layer, and CPI layer bottom coating heat light two curing layers, and through setting up the first arch and the first sunken of mutual interlock, plays the joint strength who strengthens CPI layer and the two curing layers of heat light, can also strengthen diffuse reflection simultaneously, alleviate surface reflection, the difficult reflection of light that takes place under the sunshine.

The purpose of the utility model is realized through the following technical scheme:

the utility model provides a photocuring protection film, includes protection film, sclerosis layer, CPI layer, the two cured layers of heat and light, silica gel layer and the layer of leaving of laminating in proper order, the upper surface of the two cured layers of heat and light is provided with first arch, the lower surface on CPI layer has the first sunken of matcing with first arch, when the two cured layers of heat and light laminate, first arch and the mutual interlock of first sunken.

The CPI layer obtained by coating the CPI slurry on the optical carrier film has high light transmittance and electrodeless corners, and has various properties of the CPI, such as high strength and high modulus, chemical corrosion resistance, good electrical insulation property, good radiation resistance, excellent high and low temperature resistance and the like, the bottom of the CPI layer is coated with the hot and light double curing layer, meanwhile, the CPI layer is also provided with a first recess, the hot and light double curing layer is provided with a first protrusion, the first protrusion is mutually meshed with the first recess, the connection strength of the CPI layer and the hot and light double curing layer is enhanced, the connection between the CPI layer and the hot and light double curing layer is firmer, meanwhile, the first protrusion thickens the local thickness of the hot and light double curing layer, the diffuse reflection of light at the hot and light double curing layer can also be enhanced, a certain effect is achieved on the reduction of surface reflection, and the light-cured protective film is not easy to reflect light under the sun.

Optionally, in a possible implementation manner, a material of the first protrusion is the same as a material of the thermo-optical dual cured layer, and the first protrusion is integrally formed with the thermo-optical dual cured layer.

The first protrusion and the thermo-optic double curing layer are integrally formed, wherein the shape of the first protrusion is formed through mold constraint, the shape of the first recess is formed through matched optical film-carrying mold constraint, so that the shape and the position of the first protrusion are matched with those of the first recess, and the first protrusion and the first recess are mutually meshed to enhance the connection strength of the CPI layer and the thermo-optic double curing layer.

Optionally, in a possible implementation manner, the shape of the first protrusion is a column, the cross-sectional shape of the first protrusion is a circle, a rectangle, or a triangle, and the shape of the first recess and the shape of the first protrusion are matched with each other.

The first protrusion is cylindrical in shape protruding outwards, the first recess is cylindrical in shape recessed inwards, the cross section of the first protrusion can be freely selected from various shapes such as a circle, a rectangle and a triangle, and the first protrusion and the first recess are mutually meshed to enhance the connection strength of the CPI layer and the thermo-optic double curing layer.

Optionally, in a possible implementation manner, the shape of the first protrusion is hemispherical, and the shape of the first recess matches the shape of the first protrusion.

The outward convex shape of the first protrusion is hemispherical, the inward concave shape of the first recess is also hemispherical, and the first protrusion and the first recess are mutually occluded so as to enhance the connection strength of the CPI layer and the thermo-optical double curing layer.

Optionally, in a possible implementation manner, a second protrusion is disposed on a lower surface of the thermo-optic dual-cured layer, a second recess matched with the second protrusion is formed on an upper surface of the silica gel layer, and when the thermo-optic dual-cured layer is attached to the silica gel layer, the second protrusion and the second recess are engaged with each other.

Two curing layer bottom coating silica gel layers of heat and light, silica gel layer still is provided with the second simultaneously and caves in, and two curing layers of heat and light are provided with the second arch, and the second is protruding to interlock each other with the second is sunken, plays the joint strength who strengthens two curing layers of heat and silica gel layer for the connection between two curing layers of heat and the silica gel layer of heat and light is more firm, strengthens the structural strength of photocuring protection film.

Optionally, in a possible implementation manner, the material of the second protrusion is the same as the material of the thermo-optical dual cured layer, and the second protrusion is integrally formed with the thermo-optical dual cured layer.

The second protrusion and the thermo-optical dual-curing layer are integrally formed, wherein the shape of the second protrusion is formed by being constrained by another set of mold, the shape of the second recess is formed by being constrained by another set of optical film-carrying mold matched with the second protrusion, so that the shapes and the positions of the second protrusion and the second recess are matched with each other, and the second protrusion and the second recess are mutually meshed to enhance the connection strength of the thermo-optical dual-curing layer and the silica gel layer.

Optionally, in a possible implementation manner, the shape of the second protrusion is a column, the cross-sectional shape of the second protrusion is a circle, a rectangle, or a triangle, and the shape of the second recess and the shape of the second protrusion are matched with each other.

The shape of the outward convex of the second protrusion is columnar, the shape of the inward concave of the second recess is also columnar, the section shape can be freely selected from various shapes such as circular, rectangular and triangular, and the second protrusion and the second recess are mutually occluded to enhance the connection strength of the thermo-optical dual-curing layer and the silica gel layer.

Optionally, in a possible implementation manner, the shape of the second protrusion is hemispherical, and the shape of the first recess matches the shape of the first protrusion.

The second protrusion is hemispherical in shape protruding outwards, the second recess is hemispherical in shape recessed inwards, and the second protrusion and the second recess are mutually meshed so as to enhance the connection strength of the thermo-optical double curing layer and the silica gel layer.

The utility model discloses compare in prior art's beneficial effect and be:

the utility model discloses a photocuring protection film, through the CPI layer that coats CPI thick liquids gained on the optics carrier film, not only have higher light transmissivity and electrodeless angle, and there are each item performance of CPI, such as high strength high modulus, chemical resistance, electrical insulation is good, the radiation resistance is good, high low temperature resistance performance such as good, CPI layer bottom coating thermophotonic pair of layers, the CPI layer still is provided with first sunken simultaneously, the two cured layers of thermophotonic pair are provided with first arch, first arch and the mutual interlock of first sunken, play the joint strength who strengthens CPI layer and the two cured layers of thermophotonic pair, it is more firm to make being connected between CPI layer and the two cured layers of thermophotonic pair, simultaneously can also strengthen diffuse reflection, alleviate surface reflection, the difficult reflection of light that takes place under the sunshine.

Drawings

To more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and those skilled in the art can also obtain other related drawings based on the drawings without inventive efforts.

Fig. 1 is a structural view of a photocurable protective film in example 1 of the present invention.

Fig. 2 is a structural diagram of the photocurable protective film in embodiment 2 of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, as generally described and illustrated in the figures herein, could be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present application, as presented in the figures, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without making any creative effort belong to the protection scope of the present application.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined or explained in subsequent figures. In the description of the embodiments of the present application, it should be understood that the terms "upper", "lower", "left", "right", "vertical", "horizontal", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, or orientations or positional relationships that are conventionally placed when products of the application are used, or orientations or positional relationships that are conventionally understood by those skilled in the art, and are used for convenience of description and simplification of description only, and do not indicate or imply that the devices or elements that are referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, should not be construed as limiting the application.

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.

The technical solution in the present application will be described below with reference to the accompanying drawings.

Example 1

The embodiment provides a photocuring protective film 1, which comprises a protective film 1, a hardening layer 2, a CPI layer 3, a thermal-light double curing layer 4, a silica gel layer 5 and a releasing layer 6 which are sequentially attached, wherein a first protrusion 7 is arranged on the upper surface of the thermal-light double curing layer 4, a first recess matched with the first protrusion 7 is formed in the lower surface of the CPI layer 3, and when the CPI layer 3 is attached to the thermal-light double curing layer 4, the first protrusion 7 is mutually meshed with the first recess.

Through CPI layer 3 that obtains with CPI thick liquids coating on optics carrier film, not only have higher light transmissivity and electrodeless angle, and have each item performance of CPI, for example high strength high modulus, chemical corrosion resistance, electrical insulation is good, the radiation resistance is good, high low temperature resistance performance such as good performance, CPI layer 3 bottom coating heat and light pair cured layer 4, CPI layer 3 still is provided with first sunken simultaneously, heat and light pair cured layer 4 is provided with first arch 7, first arch 7 meshes with first sunken each other, play the joint strength who strengthens CPI layer 3 and heat and light pair cured layer 4, make the connection between CPI layer 3 and the heat and light pair cured layer 4 more firm, simultaneously can also strengthen diffuse reflection, alleviate surface reflection, difficult emergence reflection under the sunshine.

The protective film is specifically an acrylic or PU protective film layer, the base material is ordinary PET, the thickness of the base material is 25-75um, preferably 75um, the PET base material can ensure the protection of the use layer in the processes of transportation, cutting and film pasting, the adhesive layer is Y-3002-9E of acrylic of an azote or PU adhesive 713 of south light, and the thickness is 10-25um, preferably 10um. Manufacturers generally choose to use a silica gel protective film and a hardened layer to be attached to each other, but silicon-H bonds in the silica gel react with silicon oil and an F aid in the UV hardened layer, so that the smoothness and the water drop angle of the UV hardened layer are affected after the silica gel is attached for a long time, and the stain resistance of the protective film is reduced; and the protective film of the acrylic and PU systems is relatively stable and has no reaction with each component in the hardened layer.

The sclerosis layer is supported by the sclerosant liquid, and thickness is 2-4um, preferred 2um, and the major component of sclerosant liquid is: 100 parts of organic-inorganic composite; 20 parts of difunctional functionality, 40 parts of tetrafunctionality, 30 parts of octafunctionality and 10 parts of dodecafunctionality of the photocuring oligomer PUA; 40 parts of reactive diluent low-molecular-weight acrylic ester; 1-5 parts of photoinitiator 184 or TPO; 0.5-3 parts of perfluoropolyether; 20-100 parts of MEK (methyl ethyl ketone) solvent;

and (3) coating a CPI layer on the smooth and expanded optical carrier film by adopting a new material CPI slurry of a Jiujiu Jiuyuan material in Zhejiang Zhongjiang province, preferably 5um, wherein the oven temperature is 70 ℃, 80 ℃, 90 ℃, 110 ℃, 130 ℃, 70 ℃ and 40 ℃, the CPI layer is wound after being dried to be surface dry, and the CPI layer is cured for 1H at 150 ℃ to obtain the carrier film and the CPI film. The CPI film coated by the coating has high light transmittance and a non-polarized angle, and has various properties of useful PI, such as high strength and high modulus, chemical corrosion resistance, good electrical insulation, good radiation resistance, excellent high and low temperature resistance and the like. Therefore, the prepared product has excellent properties of PI and is used for client verification as follows: the ultraviolet light aging, chemical resistance, hardness, friction resistance and the like have good performances.

The coating thickness of the thermo-optical double curing layer is 20-60um, and preferably 20um. 100-200 parts of polyester with double bonds are used as a main body, and the polyester is characterized by high tg point, good high temperature resistance, good ultraviolet resistance and the like, and 1-10 parts of isocyanate-based blocked curing agent capable of reacting at 150 ℃, 20-40 parts of light-cured oligomer PUA with bifunctional degree, 40-60 parts of tetrafunctional degree and 1-3 parts of light initiation are added. When the prepared light-cured adhesive is coated, the light-cured adhesive needs to be baked for 2min at the high-temperature section of an oven at 150 ℃, the surface of the light-cured adhesive is completely dry and comfortable after the light-cured adhesive with the end-capped curing agent reacts, and a low-viscosity protective film of PE (polyethylene), silica gel, acrylic or PU (polyurethane) can be pasted and wound. The design of the dry light-curing adhesive surface is to more conveniently coat silica gel on the surface, so that the adhesive surface and the silica gel have better bonding force and better matching property, and the light transmittance is better.

The coating thickness of the silica gel layer is 10-20um, preferably 10um, the DS-8630AF type silica gel is adopted as the special series of AF screen silica gel of the Dinglisen, and the silica gel layer not only has good light transmission, temperature resistance and ultraviolet resistance, but also has good adhesion to various AF screens, and the viscosity can reach 60g/25mm up.

The release layer is a fluoroplastic or non-silicon type ultra-light release film of 1-3 g.

In this embodiment, the material of the first protrusions 7 is the same as the material of the thermo-optical dual cured layer 4, and the first protrusions 7 are integrally molded with the thermo-optical dual cured layer 4.

The first protrusions 7 are integrally formed with the thermo-photo cured layer 4, wherein the first protrusions 7 are formed by mold constraint, and the first recesses are formed by matched optical film mold constraint, so as to ensure that the shapes and positions of the first protrusions 7 and the first recesses are matched with each other, and the first protrusions and the first recesses are engaged with each other to enhance the connection strength between the CPI layer 3 and the thermo-photo cured layer 4.

In this embodiment, the first protrusion 7 is in a column shape, the cross-sectional shape of the first protrusion 7 is in a circle, and the shape of the first recess matches the shape of the first protrusion 7.

The first protrusion 7 is cylindrical in shape protruding outwards, the first recess is cylindrical in shape recessed inwards, the cross section of the first protrusion is circular, and the first protrusion 7 and the first recess are mutually meshed to enhance the connection strength of the CPI layer 3 and the thermo-optical dual curing layer 4.

In this embodiment, the second protrusion 8 is disposed on the lower surface of the thermo-optical dual-cured layer 4, the second recess matching with the second protrusion 8 is disposed on the upper surface of the silicone layer 5, and when the thermo-optical dual-cured layer 4 is attached to the silicone layer 5, the second protrusion 8 and the second recess are engaged with each other.

Two cured layer 4 bottom coating silica gel layers of heat and light 5, silica gel layer 5 still is provided with the second simultaneously and caves in, two cured layer 4 of heat and light is provided with the protruding 8 of second, the protruding 8 of second is interlock each other with the second is sunken, play and strengthen the joint strength of two cured layer 4 of heat and light and silica gel layer 5, make the connection between two cured layer 4 of heat and light and silica gel layer 5 more firm, strengthen the structural strength of photocuring protection film 1.

In this embodiment, the material of the second protrusions 8 is the same as the material of the thermo-optic cured layer 4, and the second protrusions 8 and the thermo-optic cured layer 4 are integrally molded.

The second protrusion 8 and the thermo-optical dual-curing layer 4 are integrally formed, wherein the shape of the second protrusion 8 is formed by being constrained by another set of mold, and the shape of the second recess is formed by being constrained by another set of optical film-carrying mold matched with the second protrusion 8, so as to ensure that the shapes and positions of the second protrusion 8 and the second recess are matched with each other, and the second protrusion and the second recess are mutually occluded to enhance the connection strength of the thermo-optical dual-curing layer 4 and the silica gel layer 5.

In this embodiment, the second protrusion 8 has a hemispherical shape, and the shape of the first recess matches the shape of the first protrusion 7.

The outward convex shape of the second protrusion 8 is hemispherical, the inward concave shape of the second recess is also hemispherical, and the second protrusion 8 and the second recess are mutually engaged to enhance the connection strength of the thermo-optical double curing layer 4 and the silica gel layer 5.

Example 2

A photocuring protective film 1 comprises a protective film 1, a hardening layer 2, a CPI layer 3, a thermal light double curing layer 4, a silica gel layer 5 and a releasing layer 6 which are sequentially attached, wherein a first protrusion 9 is arranged on the upper surface of the thermal light double curing layer 4, a first recess matched with the first protrusion 9 is formed in the lower surface of the CPI layer 3, and when the CPI layer 3 is attached to the thermal light double curing layer 4, the first protrusion 9 and the first recess are mutually meshed.

Through CPI layer 3 that obtains with the coating of CPI thick liquids on the optics carrier film, not only have higher light transmissivity and electrodeless angle, and have CPI's each item performance, such as high strength high modulus, chemical corrosion resistance, electrical insulation is good, the radiation resistance is good, high low temperature resistance performance such as excellent performance, CPI layer 3 bottom coating thermophoto pair of cured layer 4, CPI layer 3 still is provided with first recess simultaneously, thermophoto pair of cured layer 4 is provided with first arch 9, first arch 9 meshes with first recess each other, play the joint strength of strengthening CPI layer 3 and thermophoto pair of cured layer 4, make the connection between CPI layer 3 and the thermophoto pair of cured layer 4 more firm, simultaneously can also strengthen diffuse reflection, alleviate surface reflection, difficult emergence reflection under the sunshine.

In this embodiment, the material of the first protrusions 9 is the same as the material of the thermo-optical dual cured layer 4, and the first protrusions 9 are integrally molded with the thermo-optical dual cured layer 4.

The first protrusions 9 are integrally formed with the thermo-photo cured layer 4, wherein the first protrusions 9 are formed by mold constraint, and the first recesses are formed by matched optical film mold constraint, so as to ensure that the shapes and positions of the first protrusions 9 and the first recesses are matched with each other, and the first protrusions and the first recesses are mutually engaged to enhance the connection strength of the CPI layer 3 and the thermo-photo cured layer 4.

In this embodiment, the first protrusion 9 is in a column shape, the cross-sectional shape of the first protrusion 9 is in a rectangular shape, and the shape of the first recess matches the shape of the first protrusion 9.

The first protrusion 9 is cylindrical in shape protruding outwards, the first recess is cylindrical in shape recessed inwards, the cross section of the first protrusion is rectangular, and the first protrusion 9 and the first recess are mutually meshed to enhance the connection strength of the CPI layer 3 and the thermo-optical dual curing layer 4.

In this embodiment, the lower surface of the thermo-optical dual-cured layer 4 is provided with a second protrusion 10, the upper surface of the silicone layer 5 is provided with a second recess matching with the second protrusion 10, and when the thermo-optical dual-cured layer 4 is attached to the silicone layer 5, the second protrusion 10 and the second recess are engaged with each other.

Two solidified layer 4 bottom coating silica gel layers 5 of thermo-optical, silica gel layer 5 still is provided with the second sunken simultaneously, two solidified layers 4 of thermo-optical are provided with the protruding 10 of second, the protruding 10 of second interlocks each other with the second is sunken, play the joint strength who strengthens two solidified layers 4 of thermo-optical and silica gel layer 5, make the connection between two solidified layers 4 of thermo-optical and silica gel layer 5 more firm, strengthen the structural strength of photocuring protection film 1.

In this embodiment, the material of the second protrusions 10 is the same as the material of the thermo-optical dual cured layer 4, and the second protrusions 10 are integrally molded with the thermo-optical dual cured layer 4.

The second protrusion 10 and the thermo-optical dual-curing layer 4 are integrally formed, wherein the shape of the second protrusion 10 is formed by being constrained by another set of mold, and the shape of the second recess is formed by being constrained by another set of optical film-carrying mold, so as to ensure that the shape and the position of the second protrusion 10 and the second recess are matched with each other, and the two are mutually engaged to enhance the connection strength of the thermo-optical dual-curing layer 4 and the silicone layer 5.

In the present embodiment, the shape of the second protrusion 10 is a column, the cross-sectional shape of the second protrusion 10 is a circle, a rectangle, or a triangle, and the shape of the second recess matches the shape of the second protrusion 10.

The outward convex shape of the second protrusion 10 is columnar, the inward concave shape of the second recess is columnar, the cross-sectional shape can be freely selected from various shapes such as circular, rectangular and triangular, and the second protrusion 10 and the second recess are mutually occluded to enhance the connection strength of the thermo-optical dual-curing layer 4 and the silica gel layer 5.

In this embodiment, the second protrusion 10 is hemispherical, and the shape of the first recess matches the shape of the first protrusion 9.

The second protrusion 10 is hemispherical in shape protruding outward, the second recess is hemispherical in shape recessed inward, and the second protrusion 10 and the second recess are engaged with each other to enhance the connection strength between the thermo-optical dual-curing layer 4 and the silicone layer 5.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a photocuring protection film, its characterized in that, includes protection film, sclerosis layer, CPI layer, the two cured layers of heat and light, silica gel layer and the layer of leaving of laminating in proper order, the upper surface of the two cured layers of heat and light is provided with first arch, the lower surface on CPI layer has the first sunken of matcing with first arch, when the two cured layers of heat and light laminate in CPI layer, first arch and the mutual interlock of first sunken.

2. The light-curable protective film according to claim 1, wherein the first protrusion is made of the same material as that of the thermo-photo cured layer.

3. The light-curable protective film according to claim 2, wherein the first protrusions are integrally formed with the thermo-photo dual-curable layer.

4. The light-cured protective film according to claim 3, wherein the first protrusion has a cylindrical shape, the cross-sectional shape of the first protrusion is circular, rectangular or triangular, and the shape of the first recess matches the shape of the first protrusion.

5. The photo-curing protective film according to claim 3, wherein the first protrusion has a hemispherical shape, and the shape of the first recess matches the shape of the first protrusion.

6. The light-curable protective film according to claim 1, wherein the lower surface of the thermo-photo cured layer is provided with second protrusions, the upper surface of the silicone layer has second recesses matching with the second protrusions, and when the thermo-photo cured layer is bonded to the silicone layer, the second protrusions and the second recesses are engaged with each other.

7. The light-curable protective film according to claim 6, wherein the second protrusions are made of the same material as the thermo-photo cured layer.

8. The light-curable protective film according to claim 7, wherein the second protrusions are integrally formed with the thermo-photo dual-curable layer.

9. The light-cured protective film according to claim 8, wherein the second protrusion has a cylindrical shape, the cross-sectional shape of the second protrusion is circular, rectangular or triangular, and the shape of the second recess matches the shape of the second protrusion.

10. The photo-curing protective film according to claim 8, wherein the second protrusion has a hemispherical shape, and the shape of the second recess matches the shape of the second protrusion.