CN110878189A - Screen protective film with nail print resistance and nail print self-repairing function and preparation method thereof - Google Patents

Screen protective film with nail print resistance and nail print self-repairing function and preparation method thereof Download PDF

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Publication number
CN110878189A
CN110878189A CN201911182374.9A CN201911182374A CN110878189A CN 110878189 A CN110878189 A CN 110878189A CN 201911182374 A CN201911182374 A CN 201911182374A CN 110878189 A CN110878189 A CN 110878189A
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coating
self
nail print
repairing
sensitive adhesive
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刘少飞
周艺飞
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Dongguan Saiyue New Material Technology Co Ltd
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Dongguan Saiyue New Material Technology Co Ltd
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    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J7/00—Adhesives in the form of films or foils
    • C09J7/20—Adhesives in the form of films or foils characterised by their carriers
    • C09J7/22—Plastics; Metallised plastics
    • C09J7/25—Plastics; Metallised plastics based on macromolecular compounds obtained otherwise than by reactions involving only carbon-to-carbon unsaturated bonds
    • C09J7/255—Polyesters
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
    • C09D175/04—Polyurethanes
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
    • C09D175/04—Polyurethanes
    • C09D175/06—Polyurethanes from polyesters
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
    • C09D175/04—Polyurethanes
    • C09D175/14—Polyurethanes having carbon-to-carbon unsaturated bonds
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J7/00—Adhesives in the form of films or foils
    • C09J7/20—Adhesives in the form of films or foils characterised by their carriers
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J7/00—Adhesives in the form of films or foils
    • C09J7/20—Adhesives in the form of films or foils characterised by their carriers
    • C09J7/22—Plastics; Metallised plastics
    • C09J7/25—Plastics; Metallised plastics based on macromolecular compounds obtained otherwise than by reactions involving only carbon-to-carbon unsaturated bonds
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J7/00—Adhesives in the form of films or foils
    • C09J7/30—Adhesives in the form of films or foils characterised by the adhesive composition
    • C09J7/38—Pressure-sensitive adhesives [PSA]
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J7/00—Adhesives in the form of films or foils
    • C09J7/40—Adhesives in the form of films or foils characterised by release liners
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J7/00—Adhesives in the form of films or foils
    • C09J7/50—Adhesives in the form of films or foils characterised by a primer layer between the carrier and the adhesive
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J2301/00—Additional features of adhesives in the form of films or foils
    • C09J2301/10—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet
    • C09J2301/12—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet by the arrangement of layers
    • C09J2301/122—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet by the arrangement of layers the adhesive layer being present only on one side of the carrier, e.g. single-sided adhesive tape
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J2301/00—Additional features of adhesives in the form of films or foils
    • C09J2301/30—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J2301/00—Additional features of adhesives in the form of films or foils
    • C09J2301/30—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier
    • C09J2301/302—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier the adhesive being pressure-sensitive, i.e. tacky at temperatures inferior to 30°C
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J2467/00—Presence of polyester
    • C09J2467/006—Presence of polyester in the substrate
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J2469/00—Presence of polycarbonate
    • C09J2469/006—Presence of polycarbonate in the substrate
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J2475/00—Presence of polyurethane
    • C09J2475/003—Presence of polyurethane in the primer coating
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J2475/00—Presence of polyurethane
    • C09J2475/006—Presence of polyurethane in the substrate

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Adhesive Tapes (AREA)
  • Laminated Bodies (AREA)

Abstract

The invention discloses a screen protective film with nail print resistance and nail print self-repairing function and a preparation method thereof, wherein the screen protective film comprises a transparent plastic substrate layer, a fingerprint hardening prevention coating, a self-repairing coating and a silica gel pressure-sensitive adhesive layer; this prevent fingerprint sclerosis coating coats in the upper surface of transparent plastic substrate layer, and this selfreparing coating coats in the lower surface of transparent plastic substrate layer, and this silica gel pressure sensitive adhesive layer coats in the lower surface of selfreparing coating. Through setting up fingerprint hardening coating, make this product have high hydrophobic oleophobic nature of dredging, resistant steel wool nature, high pencil hardness, improved the scratch resistance performance of screen protection film, and the cooperation sets up the selfreparing coating, utilize its shape memory function can restore nail seal and have fine heat setting performance, and through the design of screen protection film product structure, the current nail seal of solution that can be fine and screen protection film use problems such as heat setting perk that exist.

Description

Screen protective film with nail print resistance and nail print self-repairing function and preparation method thereof
Technical Field
The invention relates to the technical field of protective films, in particular to a screen protective film with nail print resistance and nail print self-repairing function and a preparation method thereof.
Background
With the experience upgrading of consumers on the man-machine interaction performance of the smart phone and the improvement of the aesthetic level, the screen of the smart phone is developed from the original 2D screen to 2.5D, 3D and flexible folding screens. Accordingly, the screen protection film is changed due to the change of the screen structure, and the screen protection film is developed from the earliest single PET protection film to a PET-bonded PET composite film protection film, a TPU protection film, a PET-bonded TPU composite film protection film and other protection films with various structures. At curved surface screens such as 2.5D, 3D, use single PET protection film and PET laminating PET complex film protection film to produce the easy problem of edge perk, use the TPU protection film to produce nail seal easily and the not good problem of scratch resistance. The PET-TPU composite film protective film has complex production process and low yield due to large difference between the elastic modulus and the shrinkage stress of the PET and the TPU.
Chinese patent publication No. CN110105896A provides a curved screen protection film, and the product structure sets gradually to prevent scraping layer, PET substrate, elastomer layer, silica gel layer and fluorine from type membrane, can improve the bending property of product, prevent falling the nature and prevent the edge perk. However, the low glass transition temperature of the elastomer layer provided in this product would make the protective film less resistant to nail print. In addition, due to the low cross-linked network structure of the elastomer layer, a solvent is easy to permeate into the elastomer layer when the silica gel layer is coated at a high temperature, so that the haze of a product is higher.
Disclosure of Invention
In view of the above, the present invention is directed to the defects existing in the prior art, and the main object of the present invention is to provide a screen protective film with nail print resistance and nail print self-repairing function and a preparation method thereof, which have high wear resistance, fingerprint resistance, low haze, and edge lift prevention, solve the nail print mark problem, and enable nail print self-repairing.
In order to achieve the purpose, the invention adopts the following technical scheme:
a screen protective film with nail print resistance and nail print self-repairing function comprises a transparent plastic substrate layer, a fingerprint hardening prevention coating, a self-repairing coating and a silica gel pressure-sensitive adhesive layer; this prevent fingerprint sclerosis coating coats in the upper surface of transparent plastic substrate layer, and this selfreparing coating coats in the lower surface of transparent plastic substrate layer, and this silica gel pressure sensitive adhesive layer coats in the lower surface of selfreparing coating.
Preferably, the thickness of the anti-fingerprint hardening coating is 2-6 microns, and the anti-fingerprint hardening coating comprises the following components: 50-70 parts of fluorine modified polyurethane acrylate, 30-40 parts of polyurethane acrylate, 0.5-1 part of flatting agent and 4-6 parts of photoinitiator.
Preferably, the photoinitiator is a mixture of more than one of a cracking photoinitiator and a hydrogen abstraction photoinitiator.
Preferably, the thickness of the transparent plastic substrate layer is 25-100 microns, and the transparent plastic substrate layer is one of a polyethylene terephthalate substrate, a thermoplastic polyurethane substrate or a polycarbonate substrate.
Preferably, the thickness of the self-repairing coating is 25-100 microns.
As a preferred scheme, the self-repairing coating comprises the following components: 100 parts of polyol, 25-42 parts of polyisocyanate, 0.04-0.15 part of catalyst and 1-4 parts of flatting agent.
In a preferred embodiment, the polyisocyanate is a mixture of one or more of aliphatic isocyanate and alicyclic isocyanate.
As a preferable scheme, the silica gel pressure-sensitive adhesive layer is of a platinum-catalyzed hydrosilylation type, and the thickness of the silica gel pressure-sensitive adhesive layer is 20-50 micrometers.
As a preferred scheme, a fluorine release layer is pasted and covered on the lower surface of the silica gel pressure-sensitive adhesive layer, and the thickness of the fluorine release layer is 50-100 micrometers.
A preparation method of a screen protective film with nail print resistance and nail print self-repairing function comprises the following steps:
(1) coating an anti-fingerprint hardened coating on one surface of a transparent plastic substrate layer: according to the coating process parameters, the anti-fingerprint hardening coating mixture is dissolved in a proper solvent, a precise coating mode is adopted, the coating with the thickness of 2-6 microns of the dry film is uniformly coated on the transparent plastic substrate layer, the coating is dried for 1-2min at the step heating temperature of 80 ℃ of an oven, and the ultraviolet curing energy is 400-2Curing to form a fingerprint hardening prevention coating;
(2) coating a self-repairing coating on the other side of the transparent plastic substrate layer: dissolving the self-repairing coating mixture in a proper solvent according to coating process parameters, uniformly coating a coating with the thickness of 25-100 microns on a transparent plastic substrate layer by adopting a precise coating mode, drying and curing at the temperature of 130 ℃ of a step heating temperature of an oven for 2-3min, and coating a release film on the coating layer for rolling; after rolling, curing for 24-48h in a curing chamber at 60 ℃ to form a self-repairing coating;
(3) coating a silica gel pressure-sensitive adhesive on the self-repairing coating surface: and (3) removing the release film on the self-repairing coating, coating the silica gel pressure-sensitive adhesive with the dry film thickness of 20-50 microns on the self-repairing coating to obtain a silica gel pressure-sensitive adhesive layer, and covering the silica gel pressure-sensitive adhesive layer with a fluorine release layer for rolling to obtain the screen protective film.
Compared with the prior art, the invention has obvious advantages and beneficial effects, and specifically, the technical scheme includes that:
the utility model provides a, through setting up fingerprint hardening coating, make this product have high hydrophobic oleophobic nature of dredging, resistant steel wool nature, high pencil hardness, improved the scratch resistance performance of screen protection film to the cooperation sets up the selfreparing coating, utilize its shape memory function can restore nail seal and have fine heat-set performance, and through the design of screen protection film product structure, the screen protection film use problems such as nail seal and heat-set perk that can be fine solution exists now.
Secondly, the invention controls the degree of the cross-linked network of the self-repairing coating system by setting the formula of the self-repairing coating, and can avoid the haze rise of the screen protective film caused by the penetration of a solvent generated by coating high-temperature curing silica gel in the subsequent process. According to the invention, by setting the formula and the thickness of each component in the structure of the screen protection film product, the problem of edge tilting of the screen protection film in use can be solved.
To more clearly illustrate the structural features and effects of the present invention, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
Drawings
FIG. 1 is a cross-sectional view of a preferred embodiment of the present invention.
The attached drawings indicate the following:
10. transparent plastic substrate layer 20 and anti-fingerprint hardening coating
30. Self-repairing coating 40 and silica gel pressure-sensitive adhesive layer
50. A fluorine release layer.
Detailed Description
Referring to fig. 1, a specific structure of a screen protective film with nail print resistance and nail print self-repairing function according to a preferred embodiment of the present invention is shown, which includes a transparent plastic substrate layer 10, a fingerprint hardening prevention coating 20, a self-repairing coating 30, and a silicone pressure sensitive adhesive layer 40.
The thickness of the transparent plastic substrate layer 10 is 25-100 microns, and the transparent plastic substrate layer 10 is one of a polyethylene terephthalate (PET) substrate, a Thermoplastic Polyurethane (TPU) substrate or a Polycarbonate (PC) substrate.
This prevent fingerprint sclerosis coating 20 coats in the upper surface of transparent plastic substrate layer 10, prevent fingerprint sclerosis coating 20's thickness and be 2-6 microns, prevent fingerprint sclerosis coating 20's component includes: 50-70 parts of fluorine modified polyurethane acrylate, 30-40 parts of polyurethane acrylate, 0.5-1 part of flatting agent and 4-6 parts of photoinitiator. The photoinitiator is a mixture of more than one of cracking type photoinitiators and hydrogen abstraction type photoinitiators.
The self-repairing coating 30 is coated on the lower surface of the transparent plastic substrate layer 10, the thickness of the self-repairing coating 30 is 25-100 microns, and the self-repairing coating 30 comprises the following components: 100 parts of polyol, 25-42 parts of polyisocyanate, 0.04-0.15 part of catalyst and 1-4 parts of flatting agent. The polyisocyanate is a mixture of more than one of aliphatic isocyanate and alicyclic isocyanate.
The silicone pressure sensitive adhesive layer 40 is coated on the lower surface of the self-repair coating 30. The silica gel pressure sensitive adhesive layer 40 is of a platinum-catalyzed hydrosilylation type, and the thickness of the silica gel pressure sensitive adhesive layer 40 is 20-50 micrometers. And the lower surface of the silica gel pressure sensitive adhesive layer 40 is coated with a fluorine release layer 50, and the thickness of the fluorine release layer 50 is 50-100 micrometers.
The invention also discloses a preparation method of the screen protective film with nail print resistance and nail print self-repairing function, which comprises the following steps:
(1) coating an anti-fingerprint hardening coating 20 on one surface of a transparent plastic substrate layer 10: according to the coating process parameters, the anti-fingerprint hardening coating mixture is dissolved in a proper solvent, a precise coating mode is adopted, the coating with the thickness of 2-6 microns of the dry film is uniformly coated on the transparent plastic substrate layer 10, the drying is carried out for 1-2min at the step temperature rise temperature of an oven of 80 ℃, and the ultraviolet curing energy is 400-2The lower curing forms the anti-fingerprint hardened coating 20.
(2) Coating the other side of the transparent plastic substrate layer 10 with a self-repairing coating 30: dissolving the self-repairing coating mixture in a proper solvent according to coating process parameters, uniformly coating a coating with the thickness of 25-100 microns on a transparent plastic substrate layer 10 by adopting a precise coating mode, drying and curing at the temperature of 130 ℃ of a step heating temperature of an oven for 2-3min, and coating a release film on the coating layer for rolling; after rolling, curing is carried out for 24-48h at 60 ℃ in a curing chamber, thereby forming the self-repairing coating 30.
(3) Coating a silica gel pressure sensitive adhesive on the surface of the self-repairing coating 30: and (3) removing the release film on the self-repairing coating 30, coating a silica gel pressure-sensitive adhesive with the dry film thickness of 20-50 microns on the self-repairing coating 30 to obtain a silica gel pressure-sensitive adhesive layer 40, and covering a fluorine release layer 50 on the silica gel pressure-sensitive adhesive layer 40 for rolling to obtain the screen protective film.
The invention is illustrated in more detail below in the following examples:
example 1:
a specific structure of a screen protection film with nail print resistance and nail print self-repairing function comprises the following components in sequence: the fingerprint hardening prevention coating comprises an anti-fingerprint hardening coating 20 with the thickness of 3 micrometers, a transparent plastic substrate layer 10 with the thickness of 50 micrometers, a self-repairing coating 30 with the thickness of 40 micrometers, a silica gel pressure-sensitive adhesive layer 40 with the thickness of 30 micrometers and a fluorine release layer 50 with the thickness of 50 micrometers, wherein the transparent plastic substrate layer 10 is a polyethylene terephthalate (PET) film.
The anti-fingerprint hardening coating 20 comprises the following components: 70 parts by mass of 6-functionality fluorine-modified polyurethane acrylate (Jettida UA-895), 30 parts by mass of 6-functionality polyurethane acrylate (Zhanxin EB-5129), 0.5 part by mass of flatting agent (BYK 3505), 4 parts by mass of photoinitiator 1-hydroxycyclohexyl benzophenone (184) and 2 parts by mass of Benzophenone (BP).
The self-healing coating 30 comprises the following components: 100 parts by mass of polyol (subtenon TRE-2-S2), 42 parts by mass of polyisocyanate (subtenon X-06), 0.1 part by mass of catalyst (organobismuth), and 3 parts by mass of leveling agent (BYK 3700).
The silicone pressure-sensitive adhesive layer 40 comprises the following components: high viscosity resin, low viscosity resin, cross-linking agent, anchoring agent and platinum catalyst, and the raw materials can be selected from the following suppliers: dow corning, KCC, poly, conlibang, kucai, kaixinwen, etc.
A preparation method of a screen protective film with nail print resistance and nail print self-repairing function comprises the following steps:
(1) coating an anti-fingerprint hardening coating 20 on one side of a transparent plastic base material layer 10 with the thickness of 50 microns: dissolving the anti-fingerprint hardening coating mixture in a solvent, controlling the solid content to be 40%, adopting a precise micro-concave coating mode, drying for 1-2min at the step temperature rise temperature of 60-70-80-70 ℃ of an oven, and curing energy of 600mJ/cm by ultraviolet light2And then cured to obtain the anti-fingerprint hardened coating 20 with the thickness of 3 microns.
(2) The other side (non-fingerprint hardening prevention coating side) of the transparent plastic substrate layer 10 is coated with the self-repairing coating 30. Dissolving the self-repairing coating mixture in a solvent, controlling the solid content to be 43%, adopting a precise micro-concave coating mode, drying and curing at the temperature of 90-110-130-100 ℃ in an oven step for 2-3min, and rolling a coating surface coated release film to obtain the self-repairing coating 30 with the thickness of 40 microns. After being rolled, the mixture is cured for 24 hours in a curing chamber at the temperature of 60 ℃.
(3) Coating the surface (after curing) of the self-repairing coating 30 with a silica gel pressure sensitive adhesive: and (3) removing the release film on the surface of the self-repairing coating 30, coating a silica gel pressure-sensitive adhesive layer 40 (an AF screen (water drop angle is 115 degrees)) with the dry film thickness of 30 micrometers on the surface of the self-repairing coating 30, testing the peeling force, controlling the peeling force to be more than or equal to 20g/25mm, coating a fluorine release layer 50 with the thickness of 50 micrometers on the silica gel pressure-sensitive adhesive layer 40, and rolling to obtain the screen protection film.
Example 2:
a screen protection film with resistant nail print and nail print selfreparing, including setting gradually: the fingerprint hardening prevention coating comprises a 2-micron-thickness fingerprint hardening prevention coating layer 20, a 50-micron-thickness transparent plastic substrate layer 10, a 50-micron-thickness self-repairing coating layer 30, a 40-micron-thickness silica gel pressure-sensitive adhesive layer 40 and a 50-micron-thickness fluorine release layer 50, wherein the transparent plastic substrate layer 10 is a polyethylene terephthalate (PET) film.
The anti-fingerprint hardening coating 20 comprises the following components: 60 parts of 6-functionality fluorine-modified polyurethane acrylate (Jettida DSP-552F), 40 parts of 9-functionality polyurethane acrylate (Sandoma CN-9013), 1 part of flatting agent (BYK 300), 3 parts of photoinitiator 1-hydroxycyclohexyl benzophenone (184) and 2 parts of 2, 4, 6-trimethyl-benzoyl diphenyl phosphine oxide (TPO).
The self-healing coating 30 comprises the following components: 70 parts by mass of polyol (subtenon TRE-2-S2), 30 parts by mass of polyol (polycaprolactone, molecular weight 4000), 32 parts by mass of polyisocyanate (subtenon X-06), 0.2 part by mass of catalyst (organic zinc) and 3 parts by mass of leveling agent (BYK 3700).
The silicone pressure-sensitive adhesive layer 40 comprises the following components: high viscosity resin, low viscosity resin, cross-linking agent, anchoring agent and platinum catalyst, and the raw materials can be selected from the following suppliers: dow corning, KCC, poly, conlibang, kucai, kaixinwen, etc.
A preparation method of a screen protective film with nail print resistance and nail print self-repairing function comprises the following steps:
(1) coating an anti-fingerprint hardening coating 20 on one side of a transparent plastic base material layer 10 with the thickness of 50 microns: dissolving the anti-fingerprint hardening coating mixture in a solvent, controlling the solid content to be 40%, adopting a precise micro-concave coating mode, drying for 1-2min at the step temperature rise temperature of 60-70-80-70 ℃ of an oven, and curing energy of 400mJ/cm by ultraviolet light2And then cured to obtain the anti-fingerprint hardened coating 20 with the thickness of 2 microns.
(2) The other side (non-fingerprint hardening prevention coating side) of the transparent plastic substrate layer 10 is coated with the self-repairing coating 30. Dissolving the self-repairing coating mixture in a solvent, controlling the solid content to be 50%, drying and curing for 2-3min at the step temperature rise temperature of 90-110-130-100 ℃ in an oven by adopting a slotdie slit type coating mode, and rolling a coated surface coated with a release film to obtain the self-repairing coating 30 with the thickness of 50 microns. After being rolled, the mixture is cured for 24 hours in a curing chamber at the temperature of 60 ℃.
(3) Coating the surface (after curing) of the self-repairing coating 30 with a silica gel pressure sensitive adhesive: and (3) removing the release film on the surface of the self-repairing coating 30, coating a silica gel pressure-sensitive adhesive layer 40[ the AF screen (water drop angle is 115 degrees) is pasted, the dry film thickness is 40 micrometers, testing the peeling force, controlling the peeling force to be more than or equal to 20g/25mm ], and coating a fluorine release layer 50 with the thickness of 50 micrometers on the silica gel pressure-sensitive adhesive layer 40 for rolling to obtain the screen protective film.
Example 3:
a screen protection film with resistant nail print and nail print selfreparing, including setting gradually: the fingerprint hardening prevention coating comprises a 6-micron-thickness fingerprint hardening prevention coating layer 20, a 100-micron-thickness transparent plastic substrate layer 10, a 35-micron-thickness self-repairing coating layer 30, a 25-micron-thickness silica gel pressure-sensitive adhesive layer 40 and a 75-micron-thickness fluorine release layer 50, wherein the transparent plastic substrate layer 10 is a Polycarbonate (PC) film.
The anti-fingerprint hardening coating 20 comprises the following components: 50 parts by mass of 6-functionality fluorine-modified polyurethane acrylate (Runke FSP 8638), 40 parts by mass of 10-functionality polyurethane acrylate (Zhanxin EB-8415), 1 part by mass of a leveling agent (Tego 2350), 3 parts by mass of a photoinitiator 1-hydroxycyclohexyl benzophenone (184) and 3 parts by mass of 2-hydroxy-2-methyl-1- [4- (2-hydroxyethoxy) phenyl ] -1-acetone (2959).
The self-healing coating 30 comprises the following components: 50 parts by mass of polyol (polycaprolactone, molecular weight 2000), 50 parts by mass of polyol (polycaprolactone, molecular weight 4000), 25 parts by mass of polyisocyanate (HDI trimer), 0.06 part by mass of catalyst (organotin) and 4 parts by mass of leveling agent (BYK 3720).
The silicone pressure-sensitive adhesive layer 40 comprises the following components: high viscosity resin, low viscosity resin, cross-linking agent, anchoring agent and platinum catalyst, and the raw materials can be selected from the following suppliers: dow corning, KCC, poly, conlibang, kucai, kaixinwen, etc.
A preparation method of a screen protective film with nail print resistance and nail print self-repairing function comprises the following steps:
(1) coating an anti-fingerprint hardened coating 20 on one side of a transparent plastic base material layer 10 with the thickness of 100 microns: dissolving the anti-fingerprint hardening coating mixture in a solvent, controlling the solid content to be 40%, adopting a slotdie slit coating mode, drying for 1-2min at the step temperature rise temperature of 60-70-80-70 ℃ of an oven, and curing energy of 400mJ/cm by ultraviolet light2And then cured to obtain the anti-fingerprint hardened coating 20 with the thickness of 6 microns.
(2) Coating the self-repairing coating 30 on the other side (non-fingerprint hardening prevention coating side) of the transparent plastic substrate layer 10: dissolving the self-repairing coating mixture in a solvent, controlling the solid content to be 40%, drying and curing for 2-3min at the step temperature rise temperature of 90-110-130-100 ℃ in an oven by adopting a slotdie slit type coating mode, and rolling a coated surface coated release film to obtain the self-repairing coating 30 with the thickness of 35 microns. After rolling, the mixture is cured for 48 hours in a curing chamber at 60 ℃.
(3) Coating the surface (after curing) of the self-repairing coating 30 with a silica gel pressure sensitive adhesive: and (3) removing the release film on the surface of the self-repairing coating 30, coating a silica gel pressure-sensitive adhesive layer 40 (an AF (Water drop angle) is 115 degrees) with the dry film thickness of 25 micrometers on the surface of the self-repairing coating 30, testing the peeling force, controlling the peeling force to be more than or equal to 20g/25 mm), coating a fluoride release layer 50 with the thickness of 75 micrometers on the silica gel pressure-sensitive adhesive layer 40, and rolling to obtain the screen protective film.
Example 4:
a screen protection film with resistant nail print and nail print selfreparing, including setting gradually: the fingerprint hardening prevention coating comprises a fingerprint hardening prevention coating layer 20 with the thickness of 4 micrometers, a transparent plastic base material layer 10 with the thickness of 100 micrometers, a self-repairing coating layer 30 with the thickness of 25 micrometers, a silica gel pressure-sensitive adhesive layer 40 with the thickness of 20 micrometers and a fluorine release layer 50 with the thickness of 100 micrometers, wherein the transparent plastic base material layer 10 is a Thermoplastic Polyurethane (TPU) film.
The anti-fingerprint hardening coating 20 comprises the following components: 50 parts by mass of 2-functionality fluorine-modified polyurethane acrylate (Zhanxin EB-8110), 40 parts by mass of 10-functionality polyurethane acrylate (Zhanxin EB-8415), 1 part by mass of a leveling agent (BYK 3500) and 6 parts by mass of a photoinitiator 1-hydroxycyclohexyl benzophenone (184).
The self-healing coating 30 comprises the following components: 50 parts by mass of a polyol (polycarbonate, molecular weight 2000), 50 parts by mass of a polyol (polycaprolactone, molecular weight 4000), 25 parts by mass of a polyisocyanate (HDI trimer), 0.06 part by mass of a catalyst (organotin), and 4 parts by mass of a leveling agent (BYK 3700).
The silicone pressure-sensitive adhesive layer 40 comprises the following components: high viscosity resin, low viscosity resin, cross-linking agent, anchoring agent and platinum catalyst, and the raw materials can be selected from the following suppliers: dow corning, KCC, poly, conlibang, kucai, kaixinwen, etc.
A preparation method of a screen protective film with nail print resistance and nail print self-repairing function comprises the following steps:
(1) the anti-fingerprint hardened coating 20 is coated on one side of the transparent plastic substrate layer 10 with the thickness of 100 microns. Dissolving the anti-fingerprint hardening coating mixture in a solvent to control the solid content to be 40 percent,adopting a precise micro-concave coating mode, drying for 1-2min at the step temperature rise of 60-70-80-70 ℃ of an oven and ultraviolet curing energy of 400mJ/cm2And then cured to obtain the anti-fingerprint hardened coating 20 with the thickness of 4 microns.
(2) Coating the self-repairing coating 30 on the other side (non-fingerprint hardening prevention coating side) of the transparent plastic substrate layer 10: dissolving the self-repairing coating mixture in a solvent, controlling the solid content to be 40%, drying and curing for 2-3min at the step temperature rise temperature of 90-110-130-100 ℃ in an oven by adopting a slotdie slit type coating mode, and rolling a coated surface coated with a release film to obtain the self-repairing coating 30 with the thickness of 25 microns. After rolling, the mixture is cured for 48 hours in a curing chamber at 60 ℃.
(3) And coating the silicone pressure-sensitive adhesive on the surface (after curing) of the self-repairing coating 30. And (3) removing the release film on the surface of the self-repairing coating 30, coating a silica gel pressure-sensitive adhesive layer 40 (an AF screen (water drop angle is 115 degrees)) with the dry film thickness of 20 micrometers on the surface of the self-repairing coating 30, testing the peeling force, controlling the peeling force to be more than or equal to 20g/25mm, coating a fluorine release layer 50 with the thickness of 100 micrometers on the silica gel pressure-sensitive adhesive layer 40, and rolling to obtain the screen protection film.
Example 5:
a screen protection film with resistant nail print and nail print selfreparing, including setting gradually: the fingerprint hardening prevention coating is characterized by comprising an anti-fingerprint hardening coating 20 with the thickness of 3 micrometers, a transparent plastic substrate layer 10 with the thickness of 25 micrometers, a self-repairing coating 30 with the thickness of 100 micrometers, a silica gel pressure-sensitive adhesive layer 40 with the thickness of 20 micrometers and a fluorine release layer 50 with the thickness of 100 micrometers, wherein the transparent plastic substrate layer 10 is a polyethylene terephthalate (PET) film.
The anti-fingerprint hardening coating 20 comprises the following components: 70 parts of 6-functionality fluorine-modified polyurethane acrylate (Jettida UA-895), 30 parts of 6-functionality polyurethane acrylate (Sandoma CN-9010), 0.5 part of flatting agent (BYK 3505), 4 parts of photoinitiator 1-hydroxycyclohexyl benzophenone (184) and 2 parts of Benzophenone (BP).
The self-healing coating 30 comprises the following components: 100 parts by mass of polyol (subtenon TRE-2-S2), 42 parts by mass of polyisocyanate (subtenon X-06), 0.1 part by mass of catalyst (organobismuth), and 3 parts by mass of leveling agent (BYK 3700).
The silicone pressure-sensitive adhesive layer 40 comprises the following components: high viscosity resin, low viscosity resin, cross-linking agent, anchoring agent and platinum catalyst, and the raw materials can be selected from the following suppliers: dow corning, KCC, poly, conlibang, kucai, kaixinwen, etc.
A preparation method of a screen protective film with nail print resistance and nail print self-repairing function comprises the following steps:
(1) coating an anti-fingerprint hardened coating 20 on one side of a transparent plastic base material layer 10 with the thickness of 25 microns: dissolving the anti-fingerprint hardening coating mixture in a solvent, controlling the solid content to be 40%, adopting a precise micro-concave coating mode, drying for 1-2min at the step temperature rise temperature of 60-70-80-70 ℃ of an oven, and curing energy of 400mJ/cm by ultraviolet light2And then cured to obtain the anti-fingerprint hardened coating 20 with the thickness of 3 microns.
(2) The other side (non-fingerprint hardening prevention coating side) of the transparent plastic substrate layer 10 is coated with the self-repairing coating 30. Dissolving the self-repairing coating mixture in a solvent, controlling the solid content to be 50%, drying and curing for 2-3min at the step temperature rise temperature of 90-110-130-100 ℃ in an oven by adopting a slotdie slit coating mode, and rolling a coated release film to obtain the self-repairing coating 30 with the thickness of 100 microns. After rolling, the mixture is cured for 48 hours in a curing chamber at 60 ℃.
(3) And coating the silicone pressure-sensitive adhesive on the surface (after curing) of the self-repairing coating 30. And (3) removing the release film on the surface of the self-repairing coating 30, coating the silica gel pressure-sensitive adhesive 40 (an AF screen (water drop angle is 115 degrees)) with the dry film thickness of 20 micrometers on the surface of the self-repairing coating 30, testing the peeling force, controlling the peeling force to be more than or equal to 20g/25mm, and winding the fluorine release layer with the thickness of 100 micrometers coated on the silica gel pressure-sensitive adhesive 40 to obtain the screen protective film.
Comparative example:
a screen protection film, comprising, arranged in order: the fingerprint hardening prevention coating is 3 microns thick, the polyethylene terephthalate (PET) film is 50 microns thick, the silica gel pressure sensitive adhesive layer is 30 microns thick, and the fluorine release layer is 50 microns thick.
The anti-fingerprint hardening coating comprises the following components: 70 parts by mass of 6-functionality fluorine-modified polyurethane acrylate (Jettida UA-895), 30 parts by mass of 6-functionality polyurethane acrylate (Zhanxin EB-5129), 0.5 part by mass of flatting agent (BYK 3505), 4 parts by mass of photoinitiator 1-hydroxycyclohexyl benzophenone (184) and 2 parts by mass of Benzophenone (BP).
This silica gel pressure-sensitive adhesive layer includes: high viscosity resin, low viscosity resin, cross-linking agent, anchoring agent and platinum catalyst, and the raw materials can be selected from the following suppliers: dow corning, KCC, poly, conlibang, kucai, kaixinwen, etc.
A preparation method of a screen protection film comprises the following steps:
(1) a fingerprint hardening preventing coating is coated on one side of a transparent plastic substrate with the thickness of 50 microns. Dissolving the anti-fingerprint hardening coating mixture in a solvent, controlling the solid content to be 40%, adopting a precise micro-concave coating mode, drying for 1-2min at the step temperature rise temperature of 60-70-80-70 ℃ of an oven, and curing energy of 500mJ/cm by ultraviolet light2And curing to obtain the anti-fingerprint hardened coating with the thickness of 3 microns.
(2) And coating the other side (the non-fingerprint hardening prevention coating side) of the transparent plastic substrate with the silica gel pressure-sensitive adhesive. Coating a silica gel pressure-sensitive adhesive layer (sticking an AF screen (water drop angle is 115 degrees)) with the dry film thickness of 30 micrometers, testing the stripping force, controlling the stripping force to be more than or equal to 20g/25mm, and covering a fluorine release layer with the thickness of 50 micrometers on the silica gel pressure-sensitive adhesive layer for rolling to obtain the screen protective film.
The screen protective films obtained in the examples and the comparative examples of the present invention were subjected to the performance test, and the results are shown in the following table 1:
TABLE 1
Performance of Example 1 Example 2 Example 3 Example 4 Example 5 Comparative example
Light transmittance 91.3% 91.2% 91.0% 90.2% 91.2% 91.2%
Haze degree 0.4% 0.5% 0.8% 0.8% 0.6% 0.6%
Hardness of 3H 3H HB F 3H 3H
Scratch resistance No scratch No scratch No scratch No scratch No scratch No scratch
Anti-warping property after hot bending forming Without tilting Without tilting Without tilting Without tilting Without tilting Upwarping
Light transmittance and haze: measured according to ASTM D1003.
Adhesion force: testing was performed according to ASTM D3359.
Hardness: the test is carried out according to GB/T6739-2006, and the load is 750 g.
Scratch resistance: 0000# Steel wool, loaded 1000g, reciprocated 1000 times, and observed whether scratch was present or not.
Anti-warping performance after hot bending forming: and installing a protective film between heating plates of a hot-pressing grinding tool according to the specification of the curved AF screen, heating and tightly attaching at 150-170 ℃ and keeping for 3 seconds, and then taking out. The thermoformed protective film was attached to the curved AF screen without bubbles, and after being placed in an oven at 80 degrees for 10 hours, whether the edge portion was lifted or not was confirmed.
The design of the invention is characterized in that: firstly, the product has high hydrophobic and oleophobic property, steel wool resistance and high pencil hardness by arranging the anti-fingerprint hardening coating, improves the scratch resistance of the screen protection film, can repair nail print by utilizing the shape memory function of the self-repairing coating in cooperation with the arrangement of the self-repairing coating, and has good heat setting performance, and can well solve the using problems of the existing screen protection films such as nail print, heat setting tilting and the like by designing the structure of the screen protection film product. Secondly, the invention controls the degree of the cross-linked network of the self-repairing coating system by setting the formula of the self-repairing coating, and can avoid the haze rise of the screen protective film caused by the penetration of a solvent generated by coating high-temperature curing silica gel in the subsequent process. According to the invention, by setting the formula and the thickness of each component in the structure of the screen protection film product, the problem of edge tilting of the screen protection film in use can be solved.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the technical scope of the present invention, so that any minor modifications, equivalent changes and modifications made to the above embodiment according to the technical spirit of the present invention are within the technical scope of the present invention.

Claims (10)

1. The utility model provides a screen protection film with resistant nail print and nail print is selfreparing which characterized in that: comprises a transparent plastic substrate layer, a fingerprint hardening prevention coating, a self-repairing coating and a silica gel pressure-sensitive adhesive layer; this prevent fingerprint sclerosis coating coats in the upper surface of transparent plastic substrate layer, and this selfreparing coating coats in the lower surface of transparent plastic substrate layer, and this silica gel pressure sensitive adhesive layer coats in the lower surface of selfreparing coating.
2. The screen protective film with nail print resistance and nail print self-repair of claim 1, wherein: the thickness of the anti-fingerprint hardening coating is 2-6 microns, and the anti-fingerprint hardening coating comprises the following components: 50-70 parts of fluorine modified polyurethane acrylate, 30-40 parts of polyurethane acrylate, 0.5-1 part of flatting agent and 4-6 parts of photoinitiator.
3. The screen protective film with nail print resistance and nail print self-repair of claim 2, wherein: the photoinitiator is a mixture of more than one of cracking type photoinitiators and hydrogen abstraction type photoinitiators.
4. The screen protective film with nail print resistance and nail print self-repair of claim 1, wherein: the thickness of the transparent plastic substrate layer is 25-100 microns, and the transparent plastic substrate layer is one of a polyethylene terephthalate substrate, a thermoplastic polyurethane substrate or a polycarbonate substrate.
5. The screen protective film with nail print resistance and nail print self-repair of claim 1, wherein: the thickness of the self-repairing coating is 25-100 microns.
6. The screen protective film with nail print resistance and nail print self-repair of claim 1, wherein: the self-repairing coating comprises the following components: 100 parts of polyol, 25-42 parts of polyisocyanate, 0.04-0.15 part of catalyst and 1-4 parts of flatting agent.
7. The screen protective film with nail print resistance and nail print self-repair of claim 6, wherein: the polyisocyanate is a mixture of more than one of aliphatic isocyanate and alicyclic isocyanate.
8. The screen protective film with nail print resistance and nail print self-repair of claim 1, wherein: the silica gel pressure-sensitive adhesive layer is of a platinum-catalyzed hydrosilylation type, and the thickness of the silica gel pressure-sensitive adhesive layer is 20-50 micrometers.
9. The screen protective film with nail print resistance and nail print self-repair of claim 1, wherein: the lower surface of the silica gel pressure-sensitive adhesive layer is coated with a fluorine release layer, and the thickness of the fluorine release layer is 50-100 microns.
10. A method for preparing the screen protective film with nail print resistance and nail print self-repair function according to any one of claims 1 to 9, wherein the method comprises the following steps: the method comprises the following steps:
(1) coating an anti-fingerprint hardened coating on one surface of a transparent plastic substrate layer: dissolving the anti-fingerprint hardening coating mixture according to the coating process parametersDissolving in proper solvent, adopting precise coating mode to uniformly coat the coating with the thickness of 2-6 microns on the transparent plastic substrate layer, drying for 1-2min at the step temperature of 80 ℃ in an oven, and curing with ultraviolet light with the energy of 400-2Curing to form a fingerprint hardening prevention coating;
(2) coating a self-repairing coating on the other side of the transparent plastic substrate layer: dissolving the self-repairing coating mixture in a proper solvent according to coating process parameters, uniformly coating a coating with the thickness of 25-100 microns on a transparent plastic substrate layer by adopting a precise coating mode, drying and curing at the temperature of 130 ℃ of a step heating temperature of an oven for 2-3min, and coating a release film on the coating layer for rolling; after rolling, curing for 24-48h in a curing chamber at 60 ℃ to form a self-repairing coating;
(3) coating a silica gel pressure-sensitive adhesive on the self-repairing coating surface: and (3) removing the release film on the self-repairing coating, coating the silica gel pressure-sensitive adhesive with the dry film thickness of 20-50 microns on the self-repairing coating to obtain a silica gel pressure-sensitive adhesive layer, and covering the silica gel pressure-sensitive adhesive layer with a fluorine release layer for rolling to obtain the screen protective film.
CN201911182374.9A 2019-11-27 2019-11-27 Screen protective film with nail print resistance and nail print self-repairing function and preparation method thereof Pending CN110878189A (en)

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CN111484810A (en) * 2020-04-23 2020-08-04 广东邦固薄膜涂料创新研究院有限公司 3D curved screen anti-fingerprint TPU (thermoplastic polyurethane) protective film and preparation method thereof
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CN112608668A (en) * 2020-12-16 2021-04-06 江阴通利光电科技有限公司 Transparent base film hardened coating protective film for folding screen and production process
CN113122156A (en) * 2021-04-29 2021-07-16 江西昊泽光学膜科技有限公司 Anti-fingerprint high-transmittance TPU (thermoplastic polyurethane) protective film suitable for curved AF (AF) screen, preparation method and application thereof
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CN113201158B (en) * 2021-04-29 2022-12-13 江西昊泽光学膜科技有限公司 TPU (thermoplastic polyurethane) protective film and preparation method thereof
CN114425918A (en) * 2022-01-20 2022-05-03 广东邦固薄膜涂料创新研究院有限公司 Leather transfer film with surface layer capable of being self-repaired, and preparation method and application method thereof
CN114425918B (en) * 2022-01-20 2023-03-24 广东邦固薄膜涂料创新研究院有限公司 Leather transfer film with self-repairable surface layer and preparation method and use method thereof

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