CN114149761A - Optical hot bending protective film for mobile phone radian screen and preparation method thereof - Google Patents

Abstract

The invention discloses an optical hot bending protective film for a mobile phone radian screen, which comprises an HC glue layer, a high-transparency base material layer, an acrylic glue layer and a hot bending base material layer, wherein the HC glue layer is coated on one side of the high-transparency base material layer, the other side of the high-transparency base material layer is attached to the hot bending base material layer through the acrylic glue layer, one side, opposite to the high-transparency base material layer, of the HC glue layer is attached to a common base material layer through a first organic silica gel layer, one side, opposite to the acrylic glue layer, of the hot bending base material layer is provided with a second organic silica gel layer, and a release film is attached to the outer side of the second organic silica gel layer. According to the invention, the hot-bending base material with good thermoplasticity is attached to the high-transmittance base material with the HC layer through the high-transmittance acrylic glue layer, so that the optical hot-bending protective film achieves the performances of good thermoplasticity, good optical performance and scratch resistance.

Description

Optical hot bending protective film for mobile phone radian screen and preparation method thereof

Technical Field

The invention belongs to the technical field of protective films, and particularly relates to an optical hot bending protective film for a radian screen of a mobile phone and a preparation method of the optical hot bending protective film.

Background

With the rapid development of the information era, touch screen products such as smart phones, tablet computers, vehicle-mounted displays and the like are widely applied to industrial production and daily life. However, such electronic products are expensive, and external protection of these products is of particular interest.

Particularly, the liquid crystal touch screens adopted by the products are directly exposed outside, and are easy to rub with metal or other hard objects to cause scratches in daily use, and if the scratches are serious, the whole screen needs to be replaced, so that the economic loss caused by the scratches is huge. The optical hot bending protective film is attached to an expensive liquid crystal screen, so that the protective film plays a role in protecting and buffering, the liquid crystal screen cannot be scratched or damaged even if being rubbed by the outside, and the service life of the mobile phone is prolonged.

The protective film is a roll-shaped protective film which is prepared by using paper, cloth and a polyester film as base materials and uniformly coating an elastomer type pressure-sensitive adhesive or a resin type pressure-sensitive adhesive on the base materials, and comprises the base materials, an adhesive, release paper (film) or silicone oil paper. The optical radian screen protection film is mainly suitable for bonding of curved surface screen materials, and compared with a common protection film, the radian of a mobile phone screen adopted by a flagship mobile phone of each big manufacturer is larger and larger from 2.5D and 3D to a current waterfall screen, the common protection film has the problems that the screen cannot be wrapped in the use process due to poor bending performance and poor film surface hardness, white edges at two bent parts, insufficient scratch resistance and the like, and further the visual effect of the screen is poor.

Disclosure of Invention

The invention aims to provide an optical hot bending protective film for a mobile phone radian screen, which is attached to the mobile phone screen through the optical hot bending protective film to form a protective buffering effect on a liquid crystal screen, so that the screen cannot be easily damaged when being impacted externally, the service life of the screen is prolonged, and the use cost of a user is saved.

In order to achieve the purpose, the invention adopts the technical scheme that: the utility model provides an optics thermal bend protection film for cell-phone radian screen, includes HC glue film, high substrate layer, acrylic acid glue film and the curved substrate layer of heat, the HC glue film is coated and is highly passed through substrate layer one side, the opposite side of high substrate layer of passing through passes through the acrylic acid glue film and the laminating of the curved substrate layer of heat, the HC glue film is laminated on ordinary substrate layer through first organic silica gel layer with high substrate layer back of the body one side of mutually, the curved substrate layer of heat is equipped with the second organic silica gel layer with acrylic acid glue film mutually in the same side, the laminating of the second organic silica gel layer outside has from the type membrane. The HC layer is scratch-resistant and has high hardness; the acrylic adhesive layer is compounded with a high-transmittance base material and a hot-bending base material; the first organic silica gel layer is used for protecting the HC layer; the second organic silica gel layer is used for being attached to a mobile phone screen; the HC layer is coated on a single-layer base material, and the single base material is hard and poor in thermoplasticity, so that the single-layer base material is changed into a layer of high-transparency base material and a layer of hot-bending base material, and the high-transparency acrylic glue layer is used for bonding the middle of the base material, and the composite base material has the characteristics of good thermoplasticity, good softness and good optical performance.

The technical scheme of further improvement in the technical scheme is as follows:

1. in the scheme, the thickness of the first organic silica gel layer is 10-30 mu m; the thickness of the HC glue layer is 3-10 μm; the thickness of the acrylic adhesive layer is 10-30 μm; the thickness of the second organic silica gel layer is 20-60 mu m.

2. In the scheme, the common base material layer is PET, PP or PE, and the thickness is 25-100 μm;

the hot bending substrate layer is made of PET, PP, PE, TPU and TPH, and has the thickness of 25-100 mu m;

the high-transmittance base material layer is single-layer or multi-layer PET, PE, PC, acrylic, PMMA, PP and PA, or single-side or double-side coated PET, PE, PC, acrylic, PMMA, PP and PA; the thickness is 25 to 100 μm; transmittance @640 nm: more than 88 percent; further transmittance @640 nm: more than 92 percent; the release film can be a fluorine release film, a non-silicon release film and the like, and has the thickness of 25-100 mu m;

the release film is a fluorine release film or a non-silicon release film, and the thickness of the release film is 25-100 mu m.

3. In the scheme, the HC glue layer is formed by coating and drying HC glue solution, and the HC glue solution comprises the following components in parts by weight: 20-30 parts of UV (ultraviolet) light curing resin, 45-65 parts of reactive diluent and 4-7 parts of photoinitiator; 1-2 parts of a leveling agent; 15-30 parts of a solvent.

4. In the scheme, the UV light-cured resin is modified polyurethane acrylate; the active diluent is one or more of cyclohexyl acrylate, isobornyl acrylate, dicyclopentanyl acrylate, dipentaerythritol pentaacrylate and hexyl acrylate derivatives; the photoinitiator is one or more of 2-hydroxy-2-methyl-1-phenyl acetone, 1-hydroxycyclohexyl phenyl ketone, 2,4, 6-trimethylbenzoyl-diphenyl phosphine oxide and 2-hydroxy-2-methyl-1- [4- (2-hydroxyethoxy) phenyl ] -1-acetone; the flatting agent is one or more of butyl acetate and isopropanol; the solvent is one of ethyl acetate, acetone, toluene and MIBK.

5. In the above scheme, the preparation raw materials of the first organic silica gel layer comprise, by weight: 30-70 parts of high-viscosity organic silicon resin, 30-70 parts of low-viscosity organic silicon resin, 0.01-2 parts of cross-linking agent and 0.1-3 parts of catalyst; 0.1-3 parts of an anchoring agent;

the preparation raw materials of the second organic silica gel layer comprise the following components in percentage by weight: 30-90 parts of high-viscosity organic silicon resin, 10-70 parts of low-viscosity organic silicon resin, 0.01-1 part of cross-linking agent and 0.1-3 parts of catalyst; 0.1-3 parts of an anchoring agent;

the high viscosity silicone resin may be 4600FC, 7657, 7667, 7687 from dow corning; the low viscosity silicone resin may be 7645, 7646, 7647, 7660 of dow corning; the cross-linking agent is selected from hydrogen-containing silicone oil 7028, 7678; catalyst: a platinum catalyst; anchoring agent: 297. 9250 (Dow Corning).

6. In the scheme, the preparation raw materials of the acrylic adhesive layer comprise the following components in percentage by weight: 70-90 parts of (methyl) acrylic ester polymer resin with the molecular weight of 40 ten thousand; 10-30 parts of tackifying resin and 0.1-3 parts of curing agent.

7. In the above scheme, the (meth) acrylate polymer is polymerized from a (meth) acrylate monomer; the (meth) acrylate ester monomer includes, but is not limited to, alkyl (meth) acrylates having an alkyl group of 1 to 18 carbon atoms such as methyl (meth) acrylate, ethyl (meth) acrylate, n-butyl (meth) acrylate, isobutyl (meth) acrylate, t-butyl (meth) acrylate, n-pentyl (meth) acrylate, n-hexyl (meth) acrylate, n-octyl (meth) acrylate, isooctyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, isodecyl (meth) acrylate, dodecyl (meth) acrylate, n-lauryl (meth) acrylate, and stearyl (meth) acrylate, or the (meth) acrylate monomer may be a (meth) acrylate having an alicyclic group such as cyclohexyl (meth) acrylate, isobornyl (meth) acrylate, dicyclopentanyl (meth) acrylate, etc.; the tackifying resin is petroleum resin (C5, C9 and C5/C9 copolymerized petroleum resin) or phenolic resin; the curing agent is one or a mixture of an isocyanate curing agent, an epoxy curing agent and aluminum acetylacetonate, and the isocyanate curing agent is as follows: one or more of HDI, MDI, XDI, TDI and IPDI, and epoxy curing agent: GA240, NE-100X, where isocyanate curing agent is selected.

The other technical scheme of the invention is as follows: a preparation method of an optical hot bending protective film for a radian screen of a mobile phone comprises the following steps:

20-30 parts of UV (ultraviolet) light curing resin, 45-65 parts of reactive diluent and 4-7 parts of photoinitiator; 1-2 parts of a leveling agent; 15-30 parts of solvent is put into a stirring kettle to be stirred for 1 hour at the rotating speed of 600RPM to obtain glue of the HC glue layer, a slit type coating head is used for coating the glue on a high-transparency base material layer, the high-transparency base material layer is dried at the temperature of 100 ℃ for 2min, and the UV energy is 300 mj/square meter to be cured to obtain the HC glue layer;

② 70-90 parts of (methyl) acrylic ester polymer resin with molecular weight of 40 ten thousand; 10-30 parts of tackifying resin and 0.1-3 parts of curing agent, putting the mixture into a stirring kettle, stirring for 1 hour at the rotating speed of 600RPM to obtain glue of an acrylic glue layer, coating the glue on a hot-bent substrate by using a slit coating head, drying the glue at 90-120 ℃ for 2min to obtain the acrylic glue layer, and attaching the acrylic glue layer to the uncoated surface of a high-transparency substrate;

thirdly, 30-90 parts of high-viscosity organic silicon resin, 10-70 parts of low-viscosity organic silicon resin, 0.01-1 part of cross-linking agent and 0.1-3 parts of catalyst; 0.1-3 parts of an anchoring agent; and (5) putting the mixture into a stirring kettle, and stirring for 1 hour at the rotating speed of 600RPM to obtain the glue of the second organic silica gel layer. Coating the other side of the hot-bending base material with a slit coating head, drying the other side at the temperature of 120-160 ℃ for 1-4min to obtain a second organic silica gel layer, and attaching the second organic silica gel layer to a release film;

fourthly, 30-70 parts of high-viscosity organic silicon resin, 30-70 parts of low-viscosity organic silicon resin, 0.01-1 part of cross-linking agent and 0.1-3 parts of catalyst are mixed; 0.1-3 parts of an anchoring agent; stirring in a stirring kettle for 1 hour at the rotation speed of 600RPM to obtain glue of the first organic silica gel layer, coating on a common substrate by using a slit coating head, drying in an oven at the temperature of 90-110 ℃ for 1-4min to obtain the first organic silica gel layer, and attaching the first organic silica gel layer to an HC glue layer;

and fifthly, curing the semi-finished product obtained from the step one to the step four for 24 hours at normal temperature to obtain the optical hot bending protective film of the mobile phone radian screen.

The other technical scheme of the invention is as follows: the application of the optical hot bending protective film is applied to external protection of mobile phones and flat touch screens.

Due to the application of the technical scheme, compared with the prior art, the invention has the following advantages:

the optical hot bending protective film for the radian screen of the mobile phone disclosed by the invention is formed by bonding a hot bending base material with good thermoplasticity with a high-transmittance base material with an HC layer through an acrylic adhesive layer with high transmittance, so that the optical hot bending protective film achieves the performances of good thermoplasticity, good optical performance and scratch resistance.

According to the invention, a single base material in the prior art is changed into a layer of high-transparency base material and a layer of hot-bending base material, the high-transparency acrylic glue layer is used for bonding the base materials, and the composite base material has the characteristics of good thermoplasticity, good softness and good optical performance.

Drawings

FIG. 1 is a schematic structural diagram of an optical hot bending protective film for a mobile phone radian screen.

In the above drawings: 1. a common base material layer; 2. a first organic silica gel layer; 3. HC glue coating; 4. a high-transmittance base material layer; 5. an acrylic acid glue layer; 6. thermally bending the substrate layer; 7. a second organic silica gel layer; 8. and (4) a release film.

Detailed Description

In the description of this patent, it is noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention; the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; furthermore, unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, as they may be fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The meaning of the above terms in this patent may be specifically understood by those of ordinary skill in the art.

The invention is further described below with reference to the following examples:

examples 1 to 4: an optical hot bending protective film for a mobile phone radian screen comprises an HC glue layer 3, a high-transmittance base material layer 4, an acrylic glue layer 5 and a hot bending base material layer 6, wherein the HC glue layer 3 is coated on one side of the high-transmittance base material layer 4, the other side of the high-transmittance base material layer 4 is attached to the hot bending base material layer 6 through the acrylic glue layer 5, one side, back to the high-transmittance base material layer 4, of the HC glue layer 3 is attached to a common base material layer 1 through a first organic silica gel layer 2, one side, back to the acrylic glue layer 5, of the hot bending base material layer 6 is provided with a second organic silica gel layer 7, and a release film 8 is attached to the outer side of the second organic silica gel layer 7;

the first organic silica gel layer 2, the HC glue layer 3, the acrylic glue layer 5 and the second organic silica gel layer 7 are respectively obtained by drying first organic silica gel liquid, HC glue liquid, acrylic glue liquid and second organic silica gel liquid, and specifically comprise the following components in parts by weight, as shown in table 1:

TABLE 1

The thickness of the first silicone gel layer 2 in example 1 was 10 μm; the HC glue layer 3 is 5 mu m thick; the thickness of the acrylic glue layer 5 is 20 micrometers; the thickness of the second organic silica gel layer 7 is 45 μm.

The common base material layer 1 is PET with the thickness of 25 μm;

the hot bending substrate layer 6 is TPH with the thickness of 50 μm;

the high-transmittance base material layer 4 is single-layer PET; the thickness is 25 μm; transmittance @640 nm: more than 88 percent;

the release film 8 is a fluorine release film with the thickness of 50 μm.

The thickness of the first organosilica gel layer 2 in example 2 was 15 μm; the HC glue layer 3 is 3 μm thick; the thickness of the acrylic glue layer 5 is 25 micrometers; the thickness of the second organic silica gel layer 7 is 25 μm.

The common base material layer 1 is PP, and the thickness is 50 mu m;

the hot bending substrate layer 6 is TPH with the thickness of 100 mu m;

the high-transmittance base material layer 4 is a single-layer PC; the thickness is 75 μm; transmittance @640 nm: more than 88 percent;

the release film 8 is a non-silicon release film and has a thickness of 75 μm.

The thickness of the first silicone gel layer 2 in example 3 was 20 μm; the thickness of the HC glue layer 3 is 10 mu m; the thickness of the acrylic glue layer 5 is 30 micrometers; the thickness of the second organic silica gel layer 7 is 35 μm.

The common base material layer 1 is made of PE and has the thickness of 75 micrometers;

the hot bending substrate layer 6 is TPU with the thickness of 75 mu m;

the high-transmittance base material layer 4 is PE with a coating on one side; the thickness is 50 μm; transmittance @640 nm: more than 88 percent;

the release film 8 is a fluorine release film with the thickness of 25 μm.

The thickness of the first organosilica gel layer 2 in example 4 was 30 μm; the HC glue layer 3 is 8 mu m thick; the thickness of the acrylic glue layer 5 is 10 micrometers; the thickness of the second organic silica gel layer 7 is 30 μm.

The common base material layer 1 is PET with the thickness of 100 mu m;

the hot bending substrate layer 6 is made of PE and has the thickness of 50 micrometers;

the high-transmittance base material layer 4 is PP with a coating on one side; the thickness is 50 μm; transmittance @640 nm: more than 88 percent;

the release film 8 is a non-silicon release film with the thickness of 25 mu m.

The thickness of the first silicone gel layer 2 in example 5 was 25 μm; the HC glue layer 3 is 4 mu m thick; the thickness of the acrylic glue layer 5 is 15 mu m; the thickness of the second organic silica gel layer 7 is 60 μm.

The common base material layer 1 is made of PE and has the thickness of 25 mu m;

the hot bending substrate layer 6 is PP, and the thickness is 25 micrometers;

the high-transmittance base material layer 4 is PET with a coating on both sides; the thickness is 100 mu m; transmittance @640 nm: more than 88 percent;

the release film 8 is a non-silicon release film with the thickness of 100 mu m.

The thickness of the first silicone gel layer 2 in example 6 was 20 μm; the HC glue layer 3 is 5 mu m thick; the thickness of the acrylic glue layer 5 is 15 mu m; the thickness of the second organic silica gel layer 7 is 50 μm.

The common base material layer 1 is PP, and the thickness is 50 mu m;

the hot bending substrate layer 6 is PET with the thickness of 25 μm;

the high-transmittance base material layer 4 is PMMA with coatings on both sides; the thickness is 50 μm; transmittance @640 nm: more than 88 percent;

the release film 8 is a fluorine release film or a non-silicon release film, and the thickness is 50 micrometers.

The preparation method of the optical hot bending protective film for the radian screen of the mobile phone comprises the following steps:

firstly, UV light-cured resin, active diluent and photoinitiator are added; leveling agent; putting the solvent into a stirring kettle, stirring for 1 hour at the rotating speed of 600RPM to obtain glue of the HC glue layer, coating the glue on a high-transparency base material layer by using a slit type coating head, drying at 100 ℃ for 2min, and curing by using UV energy of 300 mj/square meter to obtain the HC glue layer;

② a (meth) acrylic ester polymer resin having a molecular weight of 40 ten thousand; tackifying resin and curing agent, placing the tackifying resin and the curing agent into a stirring kettle, stirring for 1 hour at the rotating speed of 600RPM to obtain glue of an acrylic acid glue layer, coating the glue on a hot-bent substrate by using a slit coating head, drying at 90-120 ℃ for 2min to obtain the acrylic acid glue layer, and attaching the acrylic acid glue layer to the uncoated surface of the high-transparency substrate;

③ using high-viscosity organic silicon resin, low-viscosity organic silicon resin, a cross-linking agent and a catalyst; an anchoring agent; and (5) putting the mixture into a stirring kettle, and stirring for 1 hour at the rotating speed of 600RPM to obtain the glue of the second organic silica gel layer. Coating the other side of the hot-bending base material with a slit coating head, drying the other side at the temperature of 120-160 ℃ for 1-4min to obtain a second organic silica gel layer, and attaching the second organic silica gel layer to a release film;

fourthly, high-viscosity organic silicon resin, low-viscosity organic silicon resin, a cross-linking agent and a catalyst are mixed; an anchoring agent; stirring in a stirring kettle for 1 hour at the rotation speed of 600RPM to obtain glue of the first organic silica gel layer, coating on a common substrate by using a slit coating head, drying in an oven at the temperature of 90-110 ℃ for 1-4min to obtain the first organic silica gel layer, and attaching the first organic silica gel layer to an HC glue layer;

and fifthly, curing the semi-finished product obtained from the step one to the step four for 24 hours at normal temperature to obtain the optical hot bending protective film of the mobile phone radian screen.

In comparative examples 1 and 2, the material and thickness of each layer were the same as in examples 1 and 2, and the preparation method was the same as in examples.

The properties of the protective films prepared in examples 1 to 4 and comparative examples 1 to 2 are shown in Table 3:

TABLE 2

As shown in the evaluation results of table 2, comparative examples 1 and 2 have much less adhesion to sus than the second silicone in the examples, and do not adhere well to the mobile phone screen; comparative example 1 has a hardness larger than that of the examples, which affects the thermoplasticity of the protective film, and a white edge appears after the arc screen is attached, and comparative example 2 has a hardness smaller than that of the examples, and cannot play a scratch-proof role.

The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.

Claims (10)

1. The utility model provides a curved protection film of optics heat for cell-phone radian screen which characterized in that: including HC glue film (3), high substrate layer (4), acrylic acid glue film (5) and the hot substrate layer (6) of bending of passing through, coat in HC glue film (3) and pass through substrate layer (4) one side of passing through highly, the opposite side of the high substrate layer (4) of passing through passes through acrylic acid glue film (5) and the laminating of the hot substrate layer (6), HC glue film (3) and high substrate layer (4) of passing through back of the body one side of mutually is laminated on ordinary substrate layer (1) through first organic silica gel layer (2), the hot substrate layer (6) of bending is equipped with second organic silica gel layer (7) with acrylic acid glue film (5) one side of mutually backing on the back, the laminating has from type membrane (8) in second organic silica gel layer (7) outside.

2. The optical hot bending protective film for the radian screen of the mobile phone as claimed in claim 1, is characterized in that: the thickness of the first organic silica gel layer (2) is 10-30 mu m; the HC glue layer (3) is 3-10 mu m thick; the thickness of the acrylic glue layer (5) is 10-30 μm; the thickness of the second organic silica gel layer (7) is 20-60 mu m.

3. The optical hot bending protective film for the radian screen of the mobile phone as claimed in claim 1, is characterized in that: the common base material layer (1) is made of PET, PP or PE, and the thickness is 25-100 mu m;

the hot bending substrate layer (6) is made of PET, PP, PE, TPU and TPH, and has the thickness of 25-100 mu m;

the high-transmittance base material layer (4) is single-layer or multi-layer PET, PE, PC, acrylic, PMMA, PP, PA or single-side or double-side coated PET, PE, PC, acrylic, PMMA, PP, PA; the thickness is 25 to 100 μm; transmittance @640 nm: more than 88 percent;

the release film (8) is a fluorine release film or a non-silicon release film, and the thickness is 25-100 mu m.

4. The optical hot bending protective film for the radian screen of the mobile phone as claimed in claim 1, is characterized in that: the HC glue layer (3) is formed by coating and drying HC glue solution, and the HC glue solution comprises the following components in parts by weight: 20-30 parts of UV (ultraviolet) light curing resin, 45-65 parts of reactive diluent and 4-7 parts of photoinitiator; 1-2 parts of a leveling agent; 15-30 parts of a solvent.

5. The optical hot bending protection film for the radian screen of the mobile phone, according to claim 4, is characterized in that: the UV light-cured resin is modified polyurethane acrylate; the active diluent is one or more of cyclohexyl acrylate, isobornyl acrylate, dicyclopentanyl acrylate, dipentaerythritol pentaacrylate and hexyl acrylate derivatives; the photoinitiator is one or more of 2-hydroxy-2-methyl-1-phenyl acetone, 1-hydroxycyclohexyl phenyl ketone, 2,4, 6-trimethylbenzoyl-diphenyl phosphine oxide and 2-hydroxy-2-methyl-1- [4- (2-hydroxyethoxy) phenyl ] -1-acetone; the flatting agent is one or more of butyl acetate and isopropanol; the solvent is one of ethyl acetate, acetone, toluene and MIBK.

6. The optical hot bending protective film for the radian screen of the mobile phone as claimed in claim 1, is characterized in that: the preparation raw materials of the first organic silica gel layer (2) comprise the following components in percentage by weight: 30-70 parts of high-viscosity organic silicon resin, 30-70 parts of low-viscosity organic silicon resin, 0.01-2 parts of cross-linking agent and 0.1-3 parts of catalyst; 0.1-3 parts of an anchoring agent;

the preparation raw materials of the second organic silica gel layer (7) comprise the following components in percentage by weight: 30-90 parts of high-viscosity organic silicon resin, 10-70 parts of low-viscosity organic silicon resin, 0.01-1 part of cross-linking agent and 0.1-3 parts of catalyst; 0.1-3 parts of an anchoring agent.

7. The optical hot bending protective film for the radian screen of the mobile phone as claimed in claim 1, is characterized in that: the acrylic adhesive layer (5) is prepared from the following raw materials in percentage by weight: 70-90 parts of (methyl) acrylic ester polymer resin with the molecular weight of 40 ten thousand; 10-30 parts of tackifying resin and 0.1-3 parts of curing agent.

8. The optical hot bending protective film for the radian screen of the mobile phone, according to claim 7, is characterized in that: the (methyl) acrylate polymer is polymerized by a (methyl) acrylate monomer, wherein the (methyl) acrylate monomer comprises but is not limited to methyl (methyl) acrylate, ethyl (methyl) acrylate, n-butyl (methyl) acrylate, isobutyl (methyl) acrylate, tert-butyl (methyl) acrylate, n-amyl (methyl) acrylate, n-hexyl (methyl) acrylate, n-octyl (methyl) acrylate, isooctyl (methyl) acrylate, 2-ethylhexyl (methyl) acrylate, isodecyl (methyl) acrylate, dodecyl (methyl) acrylate, n-lauryl (methyl) acrylate and stearyl (methyl) acrylate, the alkyl (methyl) acrylate with 1-18 carbon atoms of alkyl groups including the methyl (methyl) acrylate, the ethyl (methyl) acrylate, the isodecyl (methyl) acrylate, the dodecyl (methyl) acrylate, the n-lauryl (methyl) acrylate and the stearyl (methyl) acrylate are adopted as the tackifying resin, the tackifying resin is petroleum resin or phenolic resin, the curing agent is an isocyanate curing agent, the alkyl (methyl) acrylate is adopted as the curing agent, the alkyl (methyl) acrylate, the alkyl (methyl acrylate is adopted as the curing agent, the alkyl (methyl acrylate, the alkyl (methyl) acrylate, the alkyl (methyl acrylate, the alkyl) acrylate, the alkyl (methyl acrylate, the alkyl acrylate, the, Epoxy type curing agent, aluminum acetylacetonate, or a mixture thereof.

9. The preparation method of the optical hot bending protective film for the radian screen of the mobile phone, which is disclosed by claim 1, is characterized by comprising the following steps of: the method comprises the following steps:

20-30 parts of UV (ultraviolet) light curing resin, 45-65 parts of reactive diluent and 4-7 parts of photoinitiator; 1-2 parts of a leveling agent; 15-30 parts of solvent is put into a stirring kettle to be stirred for 1 hour at the rotating speed of 600RPM to obtain glue of the HC glue layer, a slit type coating head is used for coating the glue on a high-transparency base material layer (4), the glue is dried at the temperature of 100 ℃ for 2min, and the UV energy of 300 mj/square meter is cured to obtain the HC glue layer (3);

② 70-90 parts of (methyl) acrylic ester polymer resin with molecular weight of 40 ten thousand; 10-30 parts of tackifying resin and 0.1-3 parts of curing agent are put into a stirring kettle to be stirred for 1 hour at the rotating speed of 600RPM to obtain glue of an acrylic glue layer, the glue is coated on a hot-bent substrate (6) by using a slit coating head, and the glue is dried at 90-120 ℃ for 2min to obtain the acrylic glue layer (5) and is attached to the uncoated surface of the high-transparency substrate (4);

thirdly, 30-90 parts of high-viscosity organic silicon resin, 10-70 parts of low-viscosity organic silicon resin, 0.01-1 part of cross-linking agent and 0.1-3 parts of catalyst; 0.1-3 parts of an anchoring agent; and (5) putting the mixture into a stirring kettle, and stirring for 1 hour at the rotating speed of 600RPM to obtain the glue of the second organic silica gel layer. Coating the other side of the hot-bending base material with a slit coating head, drying the other side at the temperature of 120-160 ℃ for 1-4min to obtain a second organic silica gel layer (7), and attaching the second organic silica gel layer to a release film (8);

fourthly, 30-70 parts of high-viscosity organic silicon resin, 30-70 parts of low-viscosity organic silicon resin, 0.01-1 part of cross-linking agent and 0.1-3 parts of catalyst are mixed; 0.1-3 parts of an anchoring agent; stirring in a stirring kettle for 1 hour at the rotating speed of 600RPM to obtain glue of the first organic silica gel layer, coating the glue on a common substrate (1) by using a slit type coating head, drying in an oven at the temperature of 90-110 ℃ for 1-4min to obtain a first organic silica gel layer (2), and attaching the first organic silica gel layer to an HC glue layer (3);

and fifthly, curing the semi-finished product obtained from the step one to the step four for 24 hours at normal temperature to obtain the optical hot bending protective film of the mobile phone radian screen.

10. Use of the optical thermal bend protective film according to any one of claims 1 to 9, wherein: the protective film is applied to external protection of mobile phones and flat touch screens.

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