CN112708372A - Photochromic protective film and preparation method thereof - Google Patents
Photochromic protective film and preparation method thereof Download PDFInfo
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- CN112708372A CN112708372A CN202110135150.3A CN202110135150A CN112708372A CN 112708372 A CN112708372 A CN 112708372A CN 202110135150 A CN202110135150 A CN 202110135150A CN 112708372 A CN112708372 A CN 112708372A
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- photochromic
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- 230000001681 protective effect Effects 0.000 title claims abstract description 43
- 238000002360 preparation method Methods 0.000 title abstract description 12
- 239000010410 layer Substances 0.000 claims abstract description 200
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 69
- 239000000758 substrate Substances 0.000 claims abstract description 69
- 230000003287 optical effect Effects 0.000 claims abstract description 65
- 239000000741 silica gel Substances 0.000 claims abstract description 59
- 229910002027 silica gel Inorganic materials 0.000 claims abstract description 59
- 239000012790 adhesive layer Substances 0.000 claims abstract description 45
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 40
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 40
- 239000010703 silicon Substances 0.000 claims abstract description 40
- 230000004224 protection Effects 0.000 claims abstract description 11
- 239000011248 coating agent Substances 0.000 claims description 80
- 238000000576 coating method Methods 0.000 claims description 80
- 239000007788 liquid Substances 0.000 claims description 70
- 239000003795 chemical substances by application Substances 0.000 claims description 48
- 230000002745 absorbent Effects 0.000 claims description 35
- 239000002250 absorbent Substances 0.000 claims description 35
- 239000003292 glue Substances 0.000 claims description 30
- 239000011347 resin Substances 0.000 claims description 28
- 229920005989 resin Polymers 0.000 claims description 28
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 24
- 238000001723 curing Methods 0.000 claims description 22
- 229920001187 thermosetting polymer Polymers 0.000 claims description 19
- 238000001029 thermal curing Methods 0.000 claims description 18
- 239000000654 additive Substances 0.000 claims description 14
- 239000000463 material Substances 0.000 claims description 13
- 239000011265 semifinished product Substances 0.000 claims description 13
- 230000000996 additive effect Effects 0.000 claims description 12
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- 238000010438 heat treatment Methods 0.000 claims description 10
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- 239000006096 absorbing agent Substances 0.000 claims description 9
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- 229920000647 polyepoxide Polymers 0.000 claims description 9
- 229920001296 polysiloxane Polymers 0.000 claims description 9
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims description 8
- 238000001035 drying Methods 0.000 claims description 8
- 239000000047 product Substances 0.000 claims description 8
- VCMLCMCXCRBSQO-UHFFFAOYSA-N 3h-benzo[f]chromene Chemical compound C1=CC=CC2=C(C=CCO3)C3=CC=C21 VCMLCMCXCRBSQO-UHFFFAOYSA-N 0.000 claims description 7
- 239000004925 Acrylic resin Substances 0.000 claims description 6
- UHESRSKEBRADOO-UHFFFAOYSA-N ethyl carbamate;prop-2-enoic acid Chemical compound OC(=O)C=C.CCOC(N)=O UHESRSKEBRADOO-UHFFFAOYSA-N 0.000 claims description 6
- ZQBAKBUEJOMQEX-UHFFFAOYSA-N phenyl salicylate Chemical compound OC1=CC=CC=C1C(=O)OC1=CC=CC=C1 ZQBAKBUEJOMQEX-UHFFFAOYSA-N 0.000 claims description 6
- 239000000377 silicon dioxide Substances 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 4
- 235000012239 silicon dioxide Nutrition 0.000 claims description 4
- 239000011787 zinc oxide Substances 0.000 claims description 4
- KYNSBQPICQTCGU-UHFFFAOYSA-N Benzopyrane Chemical compound C1=CC=C2C=CCOC2=C1 KYNSBQPICQTCGU-UHFFFAOYSA-N 0.000 claims description 3
- 229920002799 BoPET Polymers 0.000 claims description 3
- 239000000853 adhesive Substances 0.000 claims description 3
- 230000001070 adhesive effect Effects 0.000 claims description 3
- 229910000420 cerium oxide Inorganic materials 0.000 claims description 3
- 229910052681 coesite Inorganic materials 0.000 claims description 3
- 229910052906 cristobalite Inorganic materials 0.000 claims description 3
- MCPKSFINULVDNX-UHFFFAOYSA-N drometrizole Chemical compound CC1=CC=C(O)C(N2N=C3C=CC=CC3=N2)=C1 MCPKSFINULVDNX-UHFFFAOYSA-N 0.000 claims description 3
- BMMGVYCKOGBVEV-UHFFFAOYSA-N oxo(oxoceriooxy)cerium Chemical compound [Ce]=O.O=[Ce]=O BMMGVYCKOGBVEV-UHFFFAOYSA-N 0.000 claims description 3
- 229960000969 phenyl salicylate Drugs 0.000 claims description 3
- 229920003229 poly(methyl methacrylate) Polymers 0.000 claims description 3
- 239000004926 polymethyl methacrylate Substances 0.000 claims description 3
- 229910052682 stishovite Inorganic materials 0.000 claims description 3
- 229910052905 tridymite Inorganic materials 0.000 claims description 3
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 2
- 239000006097 ultraviolet radiation absorber Substances 0.000 claims 7
- 239000001052 yellow pigment Substances 0.000 claims 1
- 238000002834 transmittance Methods 0.000 abstract description 12
- 230000002265 prevention Effects 0.000 abstract description 5
- 230000006750 UV protection Effects 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 4
- 239000010408 film Substances 0.000 description 63
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 21
- 239000003431 cross linking reagent Substances 0.000 description 21
- -1 trimethylbenzoyl Chemical group 0.000 description 17
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 15
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 14
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 11
- 239000000178 monomer Substances 0.000 description 11
- DXPPIEDUBFUSEZ-UHFFFAOYSA-N 6-methylheptyl prop-2-enoate Chemical compound CC(C)CCCCCOC(=O)C=C DXPPIEDUBFUSEZ-UHFFFAOYSA-N 0.000 description 10
- 239000004593 Epoxy Substances 0.000 description 10
- CQEYYJKEWSMYFG-UHFFFAOYSA-N butyl acrylate Chemical compound CCCCOC(=O)C=C CQEYYJKEWSMYFG-UHFFFAOYSA-N 0.000 description 10
- 239000003054 catalyst Substances 0.000 description 9
- 239000003112 inhibitor Substances 0.000 description 9
- 229920000139 polyethylene terephthalate Polymers 0.000 description 8
- 230000000052 comparative effect Effects 0.000 description 7
- 239000004205 dimethyl polysiloxane Substances 0.000 description 7
- 229910052697 platinum Inorganic materials 0.000 description 7
- 229920000435 poly(dimethylsiloxane) Polymers 0.000 description 7
- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical compound CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 description 6
- 238000003848 UV Light-Curing Methods 0.000 description 5
- 238000007761 roller coating Methods 0.000 description 5
- 239000012141 concentrate Substances 0.000 description 3
- CQTRKDFIQFOAQV-UHFFFAOYSA-N 1',3',3'-trimethylspiro[benzo[f][1,4]benzoxazine-3,2'-indole] Chemical compound C1=CC=CC2=C(N=CC3(C(C)(C)C4=CC=CC=C4N3C)O3)C3=CC=C21 CQTRKDFIQFOAQV-UHFFFAOYSA-N 0.000 description 2
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- 239000002318 adhesion promoter Substances 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 239000000499 gel Substances 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- SCYULBFZEHDVBN-UHFFFAOYSA-N 1,1-Dichloroethane Chemical compound CC(Cl)Cl SCYULBFZEHDVBN-UHFFFAOYSA-N 0.000 description 1
- WFUGQJXVXHBTEM-UHFFFAOYSA-N 2-hydroperoxy-2-(2-hydroperoxybutan-2-ylperoxy)butane Chemical compound CCC(C)(OO)OOC(C)(CC)OO WFUGQJXVXHBTEM-UHFFFAOYSA-N 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 description 1
- 239000004342 Benzoyl peroxide Substances 0.000 description 1
- OMPJBNCRMGITSC-UHFFFAOYSA-N Benzoylperoxide Chemical compound C=1C=CC=CC=1C(=O)OOC(=O)C1=CC=CC=C1 OMPJBNCRMGITSC-UHFFFAOYSA-N 0.000 description 1
- DKPFZGUDAPQIHT-UHFFFAOYSA-N Butyl acetate Natural products CCCCOC(C)=O DKPFZGUDAPQIHT-UHFFFAOYSA-N 0.000 description 1
- 239000004594 Masterbatch (MB) Substances 0.000 description 1
- 208000002193 Pain Diseases 0.000 description 1
- 125000002490 anilino group Chemical group [H]N(*)C1=C([H])C([H])=C([H])C([H])=C1[H] 0.000 description 1
- 208000003464 asthenopia Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 235000019400 benzoyl peroxide Nutrition 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- FPAFDBFIGPHWGO-UHFFFAOYSA-N dioxosilane;oxomagnesium;hydrate Chemical compound O.[Mg]=O.[Mg]=O.[Mg]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O FPAFDBFIGPHWGO-UHFFFAOYSA-N 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- FUZZWVXGSFPDMH-UHFFFAOYSA-N hexanoic acid Chemical compound CCCCCC(O)=O FUZZWVXGSFPDMH-UHFFFAOYSA-N 0.000 description 1
- 239000002346 layers by function Substances 0.000 description 1
- 239000000395 magnesium oxide Substances 0.000 description 1
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 1
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000012788 optical film Substances 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 238000000016 photochemical curing Methods 0.000 description 1
- 229920000058 polyacrylate Polymers 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 229920002050 silicone resin Polymers 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 238000005496 tempering Methods 0.000 description 1
- 239000004408 titanium dioxide Substances 0.000 description 1
Images
Classifications
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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
- C09J7/30—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
- C09J2203/00—Applications of adhesives in processes or use of adhesives in the form of films or foils
- C09J2203/318—Applications of adhesives in processes or use of adhesives in the form of films or foils for the production of liquid crystal displays
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Laminated Bodies (AREA)
- Optical Filters (AREA)
Abstract
The invention relates to a photochromic protective film and a preparation method thereof, wherein the photochromic protective film comprises a silicon release layer, an optical adhesive layer, a photochromic layer, a substrate layer, a silica gel layer and a release film layer which are sequentially connected, the photochromic layer is used for photochromic and absorbing blue light and ultraviolet rays, the optical adhesive layer is used for bonding the silicon release layer and the photochromic layer, and the silica gel layer is used for bonding the release film layer and the substrate layer. The silicon release layer, the optical adhesive layer, the photochromic layer, the substrate layer, the silica gel layer and the release film layer are sequentially connected with the photochromic protective film, so that blue light from a display screen can be filtered, the effects of blue light prevention and ultraviolet resistance are improved, the transmittance of visible light can be automatically adjusted along with the intensity of light, the dazzling feeling of outdoor strong light on the surface of the screen caused by reflection of the outdoor strong light on the eye is avoided, the eye is effectively protected, the blue light prevention function and the photochromic function are combined into a whole, the cost is effectively reduced, and the photochromic protective film is widely applied to the field of display screen protection; the preparation method is simple and easy to control.
Description
Technical Field
The invention relates to the technical field of protective films, in particular to a photochromic protective film and a preparation method thereof.
Background
With the popularization of electronic products such as mobile phones and computers, people's lives and works are becoming more and more undiscovered from the electronic products. When a user uses the mobile phone under outdoor strong light, the user often cannot see clearly due to reflection of the screen, especially in summer with strong sunlight, when the user looks at the mobile phone outdoors, the screen can cause stinging to eyes, and the discomfort is caused to eyes of the user due to strong light reflected by the mobile phone screen.
Disclosure of Invention
In view of the above, there is a need to provide a photochromic protective film with a simple structure and capable of automatically adjusting transmittance, and a preparation method thereof is simple and easy to control.
The utility model provides a photochromic protection film, includes that the silicon that connects gradually leaves type layer, optics glue film, photochromic layer, substrate layer, silica gel layer and leaves type rete, photochromic layer is used for photochromic, and absorbs blue light and absorbs the ultraviolet ray, optics glue film is used for bonding silicon leave type layer with photochromic layer, the silica gel layer is used for bonding leave type rete with the substrate layer.
In one embodiment, the substrate layer is one of a PET film, a PC film, and a PMMA film.
In one embodiment, the silica gel layer is an organic silicon pressure sensitive adhesive, and the stripping force is 1-800 g.
In one embodiment, the thickness of the silicon release layer is 20 to 125 μm, the thickness of the optical adhesive layer is 20 to 250 μm, the thickness of the photochromic layer is 2 to 20 μm, the thickness of the substrate layer is 23 to 125 μm, the thickness of the silica gel layer is 20 to 50 μm, and the thickness of the release film layer is 20 to 125 μm.
In one embodiment, the total thickness of the optical adhesive layer, the photochromic layer, the substrate layer and the silica gel layer is 100-380 μm.
A preparation method of a photochromic protective film is based on the photochromic protective film and comprises the following steps:
preparing a base material: selecting a substrate layer with the thickness of 23-125 microns for later use;
preparing a photochromic layer: coating the prepared photochromic coating liquid on the surface of the substrate layer, and performing heating curing or ultraviolet curing to form a photochromic layer to obtain a semi-finished substrate S1; the photochromic coating liquid comprises thermosetting resin, an ultraviolet absorbent, a thermal curing agent, a flatting agent, a blue light absorbent, a photochromic agent, an additive and a solvent;
preparing a silica gel layer: coating the prepared silica gel coating liquid on one surface, away from the photochromic layer, of the substrate layer in the semi-finished product substrate S1, heating, drying and curing to form a silica gel layer, and attaching a release film layer to the surface of the silica gel layer to obtain a semi-finished product substrate S2;
preparing an optical adhesive layer: and coating the prepared optical adhesive coating liquid on the photochromic layer in the semi-finished product substrate S2, performing thermal curing or ultraviolet curing to form an optical adhesive layer, and attaching a silicon release layer on the surface of the optical adhesive layer to obtain the finished product protective film.
In one embodiment, the photochromic paint liquid comprises one or two of a spiropyran, a benzopyran, a spirooxazine, a fulgide, a fulgimide, a spironaphthooxazine or a derivative thereof, and a naphthopyran or a derivative thereof.
In one embodiment, in the photochromic masking liquid, the blue light absorber comprises one or two of yellow color concentrate, yellow phosphor, nano zinc oxide, nano cerium oxide, nano SiO2, nano CdS and nano PbS.
In one embodiment, in the photochromic coating liquid, the thermosetting resin is one of acrylic epoxy resin, urethane acrylate resin, modified acrylic epoxy resin, modified epoxy resin and modified urethane acrylate resin.
In one embodiment, in the photochromic coating liquid, the ultraviolet absorbent can be one of phenyl salicylate, ultraviolet absorbent UV-0, ultraviolet absorbent UV-P, ultraviolet absorbent UV-9, ultraviolet absorbent UV-321, ultraviolet absorbent UV-531 and ultraviolet absorbent RMB.
Compared with the prior art, the invention has the following beneficial effects:
the photochromic protective film disclosed by the invention is sequentially connected with the silicon release layer, the optical adhesive layer, the photochromic layer, the substrate layer, the silica gel layer and the release film layer, so that blue light from a display screen can be filtered, the effects of blue light prevention and ultraviolet resistance are improved, the transmittance of visible light can be automatically adjusted along with the intensity of light, the dazzling feeling of people caused by reflection of outdoor strong light on the surface of the screen is avoided, the eyes are effectively protected, the functions of preventing blue light and photochromic are combined into a whole, the cost is effectively reduced, and the photochromic protective film is widely applied to the field of protection of display screens; the preparation method is simple and easy to control.
Drawings
Fig. 1 is a schematic structural diagram of a photochromic protective film according to a preferred embodiment of the invention.
Reference is made to the accompanying drawings in which:
a photochromic protective film 100;
the optical film comprises a silicon release layer 10, an optical adhesive layer 20, a photochromic layer 30, a substrate layer 40, a silica gel layer 50 and a release film layer 60.
Detailed Description
In order that the invention may be more fully understood, reference will now be made to the following description. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. When the number of an element is referred to as "a plurality," it can be any number of two or more. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Referring to fig. 1, a photochromic protective film 100 according to a preferred embodiment of the present invention includes a silicon release layer 10, an optical adhesive layer 20, a photochromic layer 30, a substrate layer 40, a silica gel layer 50 and a release film layer 60, which are sequentially connected, and the photochromic protective film 100 of the present invention includes the silicon release layer 10, the optical adhesive layer 20, the photochromic layer 30, the substrate layer 40, the silica gel layer 50 and the release film layer 60, which are sequentially connected, and not only can filter blue light from a display screen and improve the effects of blue light resistance and ultraviolet resistance, but also can automatically adjust the transmittance of visible light according to the intensity of light, thereby avoiding the tingling feeling of the reflection of outdoor strong light on the surface of the screen to human eyes, effectively protecting the eyes, and combining the blue light resistance and the photochromic function into one, thereby effectively reducing the cost, and being widely applied to the field of display screen protection.
As shown in fig. 1, in this embodiment, the silicon release layer 10 is made of PET, and the surface of the PET is coated with a silicon release agent, and optionally, the thickness of the silicon release layer 10 is 20 μm to 125 μm.
In an embodiment, the optical adhesive layer 20 is a photo-curing pressure-sensitive adhesive or a thermal-curing pressure-sensitive adhesive, the optical adhesive layer 20 is used for bonding the silicon release layer 10 and the photochromic layer 30, optionally, the thickness of the optical adhesive layer 20 is 20 μm to 250 μm, and further, the optical adhesive layer 20 is cured by thermal curing or ultraviolet curing. Optionally, the optical adhesive layer 20 includes isooctyl acrylate, butyl acrylate, hydroxyl-containing monomer acrylic acid, epoxy cross-linking agent, photoinitiator trimethylbenzoyl and tackifier; the optical adhesive layer 20 is prepared according to the following mixture ratio: isooctyl acrylate, accounting for 40% of the total mass; butyl acrylate, accounting for 40% of the total mass; the hydroxyl-containing monomer is acrylic acid and accounts for 5 percent of the total mass; an epoxy cross-linking agent accounting for 2% of the total mass; the photoinitiator trimethyl benzoyl accounts for 2 percent of the total mass; the tackifier accounts for 3% of the total mass.
In one embodiment, the photochromic layer 30 is used for photochromic and absorbing blue light and ultraviolet light, optionally, the thickness of the photochromic layer 30 is 2 μm to 20 μm, the optical adhesive layer 20 is adhered to the photochromic layer 30 by coating and curing, and further, the photochromic layer 30 is cured by thermal curing or ultraviolet curing. In one embodiment, the photochromic layer 30 is formed by coating a photochromic coating liquid on the surface of the substrate layer 40 and curing the coating liquid, wherein the photochromic coating liquid comprises a thermosetting resin, an ultraviolet absorbent, a thermal curing agent, a leveling agent, a blue light absorber, a photochromic agent, an additive and a solvent; optionally, the photochromic coating liquid comprises 20-80% of thermosetting resin, 1-10% of ultraviolet absorbent, 0.5-3% of thermosetting agent, 0.5-3% of flatting agent, 0.1-5% of blue light absorber, 0.1-5% of photochromic agent, 0.1-10% of additive and 1-50% of solvent. Further, the formula of the photochromic masking liquid is as follows: 50% of thermosetting resin, 3% of ultraviolet absorbent, 3% of thermal curing agent, 0.5% of flatting agent, 1% of blue light absorbent, 5% of photochromic agent, 5% of additive and 32.5% of solvent.
Furthermore, the thermosetting resin can be acrylic epoxy resin, urethane acrylate resin, modified acrylic epoxy resin, modified epoxy resin and modified urethane acrylate resin, and the dosage of the thermosetting resin is generally 20-80%, preferably 20-50%. Optionally, the acrylate is a mixture of isooctyl acrylate and butyl acrylate, and accounts for 70-90% of the total mass; the hydroxyl-containing monomer is acrylic acid and accounts for 5-10% of the total mass; the cross-linking agent is an epoxy cross-linking agent containing an aniline structure and accounts for 1-3% of the total mass; the photoinitiator is trimethyl benzoyl accounting for 1-2% of the total mass; the tackifier accounts for 1 to 5 percent of the total mass. Further, isooctyl acrylate accounts for 40% of the total mass; butyl acrylate, accounting for 40% of the total mass; the hydroxyl-containing monomer is acrylic acid and accounts for 5 percent of the total mass; an epoxy cross-linking agent accounting for 2% of the total mass; the photoinitiator trimethyl benzoyl accounts for 2 percent of the total mass; the tackifier accounts for 3% of the total mass.
The ultraviolet absorbent can be organic ultraviolet absorbent or nanometer inorganic ultraviolet reflecting agent, and the organic ultraviolet absorbent can be one of phenyl salicylate, ultraviolet absorbent UV-0, ultraviolet absorbent UV-P, ultraviolet absorbent UV-9, ultraviolet absorbent UV-321, ultraviolet absorbent UV-531, and ultraviolet absorbent RMB. The nanometer inorganic ultraviolet reflecting agent can be one of nanometer silicon dioxide, nanometer titanium dioxide, nanometer zinc oxide, pearl powder, talcum powder and magnesium oxide. The UV absorbers are generally used in amounts of from 1% to 10%, preferably from 1% to 5%.
The thermal curing agent can be one of methyl ethyl ketone peroxide, benzoyl peroxide, No. 704 curing agent and No. 705 curing agent, and the dosage of the thermal curing agent is 0.5-3%, preferably 1-3%.
The blue light absorber comprises one or two of yellow color concentrate, yellow fluorescent powder, nano zinc oxide, nano cerium oxide, nano SiO2, nano CdS and nano PbS, preferably the composition of the yellow color concentrate and the CdS; alternatively, the amount of the blue light absorber is generally 0.1% to 5%, and further, the amount of the blue light absorber is 0.1% to 2%.
The photochromic agent comprises one or two of spiropyran, benzopyran, spirooxazine, fulgide, fulgimide, spironaphthooxazine or derivatives thereof, and naphthopyran or derivatives thereof. In this example, a naphthopyran derivative was selected.
In order to improve the leveling property, stability and transparency of the coating, the total content of the additives is 0.1-10%, optionally, the additives can be selected from at least two of various leveling agents, stabilizers, dispersants and anti-reflection agents in the prior art, further, the dosage of each additive can be determined according to the coating thickness and the amount of the thermosetting resin, and the dosage of each additive is generally 0.1-5%, preferably 0.15-3%.
The solvent can be one or a combination of at least two of toluene, ethyl acetate, butanone, butyl acetate and dichloroethane, the dosage range is 1% -50%, and the combination of toluene and butanone is preferred.
In an embodiment, the substrate layer 40 is one of a PET film, a PC film, and a PMMA film, optionally, the thickness of the substrate layer 40 is 23 μm to 125 μm, and the substrate layer 40 is cured by thermal curing.
In an embodiment, the silicone layer 50 is used to bond the release film layer 60 and the substrate layer 40, the silicone layer 50 is bonded to the substrate layer 40 by coating and curing, optionally, the silicone layer 50 is cured by thermosetting, and the thickness of the silicone layer 50 is 20 μm to 50 μm. Further, the silica gel layer 50 is an organic silicon pressure sensitive adhesive, the stripping force is 1-800 g, and the organic silicon pressure sensitive adhesive comprises organic silicon resin, an MQ resin regulator, a tackifier, a crosslinking agent, a leveling agent, an inhibitor and a catalyst. Optionally, the organic silicon resin is polydimethylsiloxane accounting for 30-60% of the total mass; the MQ silicon resin accounts for 20-70% of the total mass; the tackifier accounts for 1 to 5 percent of the total mass; the cross-linking agent accounts for 0.1 to 0.5 percent of the total mass; the platinum catalyst accounts for 0.5 to 1.5 percent of the total mass; the inhibitor accounts for 0.1 to 0.5 percent of the total mass; the leveling agent accounts for 0.5 to 1.5 percent of the total mass part. Further, the organic silicon resin is polydimethylsiloxane accounting for 30 percent of the total mass; the MQ silicon resin accounts for 30 percent of the total mass; the tackifier accounts for 2 percent of the total mass; the cross-linking agent accounts for 0.2 percent of the total mass; the platinum catalyst accounts for 1.5 percent of the total mass; the inhibitor accounts for 0.1 percent of the total mass; the leveling agent accounts for 0.5 percent of the total mass part. In other embodiments, the silicone gel layer 50 is a photo-curable pressure sensitive adhesive comprising a polyacrylate, a hydroxyl-containing monomer, a cross-linking agent, a photoinitiator, an adhesion promoter, and the like.
In an embodiment, the release film layer 60 is a PET-based film, and optionally, the thickness of the release film layer 60 is 20 μm to 125 μm. The total thickness of the optical adhesive layer 20, the photochromic layer 30, the substrate layer 40 and the silica gel layer 50 is 100 to 380 μm.
The preparation method of the photochromic protective film 100 comprises the following steps:
preparing a base material: selecting a substrate layer 40 with the thickness of 23-125 microns for later use;
preparing a photochromic layer: coating the prepared photochromic coating liquid on the surface of the substrate layer 40, and performing heating curing or ultraviolet curing to form a photochromic layer 30, so as to obtain a semi-finished substrate S1; optionally, the photochromic coating liquid comprises 20-80% of thermosetting resin, 1-10% of ultraviolet absorbent, 0.5-3% of thermosetting agent, 0.5-3% of flatting agent, 0.1-5% of blue light absorber, 0.1-5% of photochromic agent, 0.1-10% of additive and 1-50% of solvent. Further, the formula of the photochromic masking liquid is as follows: 50% of thermosetting resin, 3% of ultraviolet absorbent, 3% of thermal curing agent, 0.5% of flatting agent, 1% of blue light absorbent, 5% of photochromic agent, 5% of additive and 32.5% of solvent. And (3) pumping the prepared photochromic coating liquid into a glue groove of a micro-mesh roller by adopting a gear pump, selecting 70 lines as the number of lines of the micro-mesh roller, and coating the photochromic coating liquid on the substrate layer 40 in a slit coating mode.
Preparing a silica gel layer: coating the prepared silica gel coating liquid on one surface, away from the photochromic layer 30, of the substrate layer 40 in the semi-finished product substrate S1 in a slit coating mode, heating, drying and curing to form a silica gel layer 50, and attaching a release film layer 60 to the surface of the silica gel layer 50 to obtain a semi-finished product substrate S2; optionally, the silicone gel layer 50 is a silicone pressure sensitive adhesive, and the silicone pressure sensitive adhesive contains a silicone resin, an MQ resin regulator, a tackifier, a crosslinking agent, a leveling agent, an inhibitor, and a catalyst. After the silica gel masking liquid is blended, vacuum defoaming is carried out for a period of time, and the silica gel masking liquid is coated on the opposite side of the semi-finished product substrate S1 by adopting a slit coating mode.
Preparing an optical adhesive layer: coating the prepared optical adhesive coating liquid on the photochromic layer 30 in the semi-finished product substrate S2 by adopting a double-roll coating mode, performing thermocuring or ultraviolet curing to form an optical adhesive layer 20, and attaching a silicon release layer 10 on the surface of the optical adhesive layer 20 to obtain a finished product protective film; optionally, the optical adhesive layer 20 includes isooctyl acrylate, butyl acrylate, hydroxyl-containing monomer acrylic acid, epoxy cross-linking agent, photoinitiator trimethylbenzoyl and adhesion promoter. After the optical glue coating liquid is blended, the optical glue coating liquid is defoamed in vacuum for a period of time, and the optical glue coating liquid is coated on the photochromic layer 30 in the semi-finished substrate S2 by adopting a double-roller coating mode.
To further demonstrate the performance of the present photochromic protective film 100, the following examples are provided:
example 1
The material of the substrate layer 40 is PET, and the thickness is 50 μm.
The formula of the photochromic masking liquid comprises the following components: 50% of thermosetting resin, 3% of thermal curing agent, 0.5% of flatting agent, 3% of ultraviolet absorbent, 1% of blue light absorbent, 5% of photochromic naphthopyran derivative, 5% of additive and 32.5% of solvent. After the above coating liquids are blended, the liquids are pumped into a glue tank of a micro-mesh roller by a gear pump, 70 lines are selected as the number of lines of the micro-mesh roller, the above photochromic coating liquids are coated on the substrate layer 40, and after the coating liquids are dried and solidified by heating, the glue thickness is 6 μm, thus obtaining the semi-finished substrate S1.
The other side of the semi-finished product substrate S1 was coated with the silica gel layer 50, and the silica gel layer 50 was prepared as follows: polydimethylsiloxane accounting for 30 percent of the total mass; the MQ silicon resin accounts for 30 percent of the total mass; the tackifier accounts for 2 percent of the total mass; the cross-linking agent accounts for 0.2 percent of the total mass; the platinum catalyst accounts for 1.5 percent of the total mass; the inhibitor accounts for 0.1 percent of the total mass; the leveling agent accounts for 0.5 percent of the total mass part. After the preparation of the coating liquid, vacuum defoaming for 45 minutes, coating the silica gel liquid on the opposite surface of S1 by adopting a slit coating mode, drying for 2 minutes at 150 ℃, curing, attaching a release film with the thickness of 50 microns, and attaching a silica gel layer with the thickness of 50 microns to obtain a semi-finished substrate S2.
The optical adhesive layer 20 is coated, and the optical adhesive layer 20 is coated on the other side of the silica gel layer 50 in the semi-finished substrate S2, that is, on the photochromic layer 30. The optical glue layer 20 is prepared as follows: isooctyl acrylate, accounting for 40% of the total mass; butyl acrylate, accounting for 40% of the total mass; the hydroxyl-containing monomer is acrylic acid and accounts for 5 percent of the total mass; an epoxy cross-linking agent accounting for 2% of the total mass; the photoinitiator trimethyl benzoyl accounts for 2 percent of the total mass; the tackifier accounts for 3% of the total mass. After the above coating liquid is blended, vacuum defoaming is carried out for 45 minutes, optical glue liquid is coated on one surface of the photochromic layer 30 by adopting a double-roller coating mode, low-pressure UV curing is carried out, a silicon release film with the thickness of 50 microns is pasted, and the thickness of the optical glue layer is 20 microns and 42 microns, thus obtaining the finished protective film.
The thickness of the using layer of the finished protective film is 126 microns, and the using layer comprises the sum of the thickness of the silica gel layer 50, the thickness of the optical adhesive layer 20, the thickness of the base material layer 40 and the thickness of the photochromic layer 30.
Example 2
The material of the substrate layer 40 is PET, and the thickness is 50 μm.
The formula of the photochromic masking liquid comprises the following components: 50% of thermosetting resin, 3% of thermal curing agent, 0.5% of flatting agent, 3% of ultraviolet absorbent, 1% of blue light absorbent, 5% of photochromic naphthopyran derivative, 5% of additive and 32.5% of solvent. After the above coating liquids are blended, the liquids are pumped into a glue tank of a micro-mesh roller by a gear pump, 70 lines are selected as the number of lines of the micro-mesh roller, the above photochromic coating liquids are coated on the substrate layer 40, and after the coating liquids are dried and solidified by heating, the glue thickness is 6 μm, thus obtaining the semi-finished substrate S1.
The other side of the semi-finished product substrate S1 was coated with the silica gel layer 50, and the silica gel layer 50 was prepared as follows: polydimethylsiloxane accounting for 30 percent of the total mass; the MQ silicon resin accounts for 30 percent of the total mass; the tackifier accounts for 2 percent of the total mass; the cross-linking agent accounts for 0.2 percent of the total mass; the platinum catalyst accounts for 1.5 percent of the total mass; the inhibitor accounts for 0.1 percent of the total mass; the leveling agent accounts for 0.5 percent of the total mass; toluene accounts for 15.7 percent of the total mass; the ethyl acetate accounts for 20 percent of the total mass. After the preparation of the coating liquid, vacuum defoaming for 45 minutes, coating the silica gel liquid on the opposite surface of S1 by adopting a slit coating mode, drying for 2 minutes at 150 ℃, curing, attaching a release film with the thickness of 50 microns, and attaching a silica gel layer with the thickness of 50 microns to obtain a semi-finished substrate S2.
The optical adhesive layer 20 is coated, and the optical adhesive layer 20 is coated on the other side of the silica gel layer 50 in the semi-finished substrate S2, that is, on the photochromic layer 30. The optical glue layer 20 is prepared as follows: isooctyl acrylate, accounting for 40% of the total mass; butyl acrylate, accounting for 40% of the total mass; the hydroxyl-containing monomer is acrylic acid and accounts for 5 percent of the total mass; an epoxy cross-linking agent accounting for 2% of the total mass; the photoinitiator trimethyl benzoyl accounts for 2 percent of the total mass; the tackifier accounts for 3% of the total mass. After the coating liquid is prepared, vacuum defoaming is carried out for 45 minutes, optical glue liquid is coated on one surface of the photochromic layer 30 in a double-roller coating mode, low-pressure UV curing is carried out, a silicon release film with the thickness of 50 microns is pasted, and the thickness of the optical glue layer is 20 microns and 96 microns, so that a finished product protective film is obtained.
The thickness of the using layer of the finished protective film is 180 mu m, and the using layer comprises the sum of the thickness of the silica gel layer 50, the thickness of the optical adhesive layer 20, the thickness of the base material layer 40 and the thickness of the photochromic layer 30.
Example 3
The material of the substrate layer 40 is PET, and the thickness is 100 μm.
The formula of the photochromic masking liquid comprises the following components: 50% of thermosetting resin, 3% of thermal curing agent, 0.5% of flatting agent, 3% of ultraviolet absorbent, 1% of blue light absorbent, 5% of photochromic naphthopyran derivative, 5% of additive and 32.5% of solvent. After the above coating liquids are blended, the liquids are pumped into a glue tank of a micro-mesh roller by a gear pump, 70 lines are selected as the number of lines of the micro-mesh roller, the above photochromic coating liquids are coated on the substrate layer 40, and after the coating liquids are dried and solidified by heating, the glue thickness is 6 μm, thus obtaining the semi-finished substrate S1.
The other side of the semi-finished product substrate S1 was coated with the silica gel layer 50, and the silica gel layer 50 was prepared as follows: polydimethylsiloxane accounting for 30 percent of the total mass; the MQ silicon resin accounts for 30 percent of the total mass; the tackifier accounts for 2 percent of the total mass; the cross-linking agent accounts for 0.2 percent of the total mass; the platinum catalyst accounts for 1.5 percent of the total mass; the inhibitor accounts for 0.1 percent of the total mass; the leveling agent accounts for 0.5 percent of the total mass; toluene accounts for 15.7 percent of the total mass; the ethyl acetate accounts for 20 percent of the total mass. After the preparation of the coating liquid, vacuum defoaming for 45 minutes, coating the silica gel liquid on the opposite surface of S1 by adopting a slit coating mode, drying for 2 minutes at 150 ℃ for curing, and attaching a release film with the thickness of 50 microns, wherein the thickness of the silica gel layer is 50 microns. A semi-finished substrate S2 was obtained.
The optical adhesive layer 20 is coated, and the optical adhesive layer 20 is coated on the other side of the silica gel layer 50 in the semi-finished substrate S2, that is, on the photochromic layer 30. The optical glue layer 20 is prepared as follows: isooctyl acrylate, accounting for 40% of the total mass; butyl acrylate, accounting for 40% of the total mass; the hydroxyl-containing monomer is acrylic acid and accounts for 5 percent of the total mass; an epoxy cross-linking agent accounting for 2% of the total mass; the photoinitiator trimethyl benzoyl accounts for 2 percent of the total mass; the tackifier accounts for 3% of the total mass. After the above coating liquid is blended, vacuum defoaming is carried out for 45 minutes, optical glue liquid is coated on one surface of the photochromic layer 30 by adopting a double-roller coating mode, low-pressure UV curing is carried out, a silicon release film with the thickness of 50 microns is pasted, and the thickness of the optical glue layer is 20 microns and 142 microns, so that a finished product protective film is obtained.
The thickness of the using layer of the finished protective film is 276 mu m, and the using layer comprises the sum of the thickness of the silica gel layer 50, the thickness of the optical adhesive layer 20, the thickness of the base material layer 40 and the thickness of the photochromic layer 30.
Comparative example 1
And adding the blue light absorbent and the ultraviolet light absorbent into the PET master batch, and preparing the blue light-proof ultraviolet-resistant base film with the thickness of 100 mu m through melt extrusion and biaxial stretching molding.
The silica gel layer was prepared as follows: the polydimethylsiloxane accounts for 30 percent of the total mass; the MQ silicon resin accounts for 30 percent of the total mass; the tackifier accounts for 2 percent of the total mass; the cross-linking agent accounts for 0.2 percent of the total mass; the platinum catalyst accounts for 1.5 percent of the total mass; the inhibitor accounts for 0.1 percent of the total mass; the leveling agent accounts for 0.5 percent of the total mass; toluene accounts for 15.7 percent of the total mass; the ethyl acetate accounts for 20 percent of the total mass. After the coating liquid is blended, defoaming for 45 minutes in vacuum, coating the silica gel liquid on one surface of the blue-light-proof anti-ultraviolet basal membrane in a slit coating mode, drying and solidifying by heat, pasting a release membrane with the thickness of 50 microns, and carrying out the next process, wherein the thickness of the silica gel is 28 microns.
And coating the optical adhesive layer, wherein the other side of the blue-light-proof ultraviolet-resistant base film is coated with the optical adhesive layer. The optical glue layer was prepared as follows: isooctyl acrylate, accounting for 40% of the total mass; butyl acrylate, accounting for 40% of the total mass; the hydroxyl-containing monomer is acrylic acid and accounts for 5 percent of the total mass; an epoxy cross-linking agent accounting for 2% of the total mass; the photoinitiator trimethyl benzoyl accounts for 2 percent of the total mass; the tackifier accounts for 3% of the total mass. After the coating liquid is blended, vacuum defoaming is carried out for 45 minutes, the optical glue liquid is coated on the other surface of the blue-light-proof ultraviolet-resistant base film, namely the back surface of the silica gel layer, low-pressure UV curing is carried out, a silica release film with the thickness of 50 microns is pasted, and the thickness of the optical glue is 142 microns.
After the process is completed, the thickness of the using layer of the blue light-proof and ultraviolet-proof protective film is 270 mu m.
Comparative example 2
The material of the substrate layer is PET, and the thickness is 100 mu m.
According to the existing published formula for preventing blue light and resisting ultraviolet: 50% of thermosetting resin, 3% of thermal curing agent, 0.5% of flatting agent, 3% of ultraviolet absorbent, 1% of blue light absorbent, 20% of toluene and 22.5% of butanone. After the above coating liquids are blended, the liquids are pumped into a glue tank of a micro-mesh roller by a gear pump, 70 lines are selected as the number of lines of the micro-mesh roller, the coating liquids are coated on a substrate layer, and the glue thickness is 6 μm after the coating liquids are dried and solidified by heat.
And (3) firstly carrying out silica gel layer process coating on the blue-light-proof and ultraviolet-proof base material which is processed, wherein the silica gel layer is coated on one surface of the base material layer. The silica gel layer was prepared as follows: the polydimethylsiloxane accounts for 30 percent of the total mass; the MQ silicon resin accounts for 30 percent of the total mass; the tackifier accounts for 2 percent of the total mass; the cross-linking agent accounts for 0.2 percent of the total mass; the platinum catalyst accounts for 1.5 percent of the total mass; the inhibitor accounts for 0.1 percent of the total mass; the leveling agent accounts for 0.5 percent of the total mass; toluene accounts for 15.7 percent of the total mass; the ethyl acetate accounts for 20 percent of the total mass. After the coating liquid is blended, defoaming for 45 minutes in vacuum, coating the silica gel liquid on one surface of the blue light-proof and ultraviolet-proof base material by adopting a slit coating mode, drying and solidifying by heating, pasting a release film with the thickness of 50 microns, and carrying out the next process, wherein the thickness of the silica gel is 28 microns.
Coating of the optical adhesive layer, wherein the optical adhesive layer is coated on one side of the blue light-proof and ultraviolet-proof functional layer, and the optical adhesive layer is prepared as follows: isooctyl acrylate, accounting for 40% of the total mass; butyl acrylate, accounting for 40% of the total mass; the hydroxyl-containing monomer is acrylic acid and accounts for 5 percent of the total mass; an epoxy cross-linking agent accounting for 2% of the total mass; the photoinitiator trimethyl benzoyl accounts for 2 percent of the total mass; the tackifier accounts for 3% of the total mass. After the above coating liquids are blended, vacuum defoaming is carried out for 45 minutes, the optical glue liquid is coated on the other surface of the blue light and ultraviolet resistant by adopting a double-roller coating mode, low-pressure UV curing is carried out, and a silicon release film with the thickness of 50 μm is pasted, wherein the optical glue thickness is 142 μm.
After the process is completed, the thickness of the using layer of the blue light-proof and ultraviolet-proof protective film is 270 mu m.
The prepared blue light-proof and ultraviolet-proof protective film is die-cut into sheets, is attached to prepare a toughened film, and is subjected to the following tests. The ultraviolet transmittance and the blue light blocking rate of the protective film are tested by using an NS12 high-precision optical transmittance tester, a toughened film finished product prepared by using the protective film is tested by using a WGT-S light transmittance haze tester, the light transmittance and the haze value are tested indoors, the comfort level of a mobile phone screen is tested by naked eyes under the same outdoor conditions, and the test results are shown in Table 1.
| Adhesion force | Transmittance of ultraviolet ray | Blue light blocking ratio | Light transmittance | Haze value | Naked eye comfort test | |
| Example 1 | 5B | <1% | 37% | 85.50% | 1.56 | Is excellent in |
| Example 2 | 5B | <1% | 37% | 85.40% | 1.6 | Is excellent in |
| Example 3 | 5B | <1% | 38% | 85.50% | 1.68 | Is excellent in |
| Comparative example 1 | 5B | <1% | 33% | 85.0% | 1.58 | Is poor |
| Comparative example 2 | 5B | <1% | 34% | 85.2% | 1.7 | Is poor |
TABLE 1
As can be seen from examples 1, 2, and 3 and comparative examples 1 and 2, examples 1 to 3 have light transmittance and haze comparable to those of comparative examples, but have comfort in the open air significantly better than those of comparative examples 1 and 2.
The silicon release layer 10, the optical adhesive layer 20, the photochromic layer 30, the substrate layer 40, the silica gel layer 50 and the release film layer 60 which are sequentially connected with the photochromic protection film 100 can not only filter blue light from a display screen and improve the effects of blue light prevention and ultraviolet resistance, but also automatically adjust the transmittance of visible light along with the intensity of light (sunlight or ultraviolet), and can recover to an initial state under the condition of no light irradiation, so that the light of the screen is soft, the eye fatigue is prevented, the dazzling feeling of outdoor strong light on the surface of the screen due to reflection of the outdoor strong light on the eyes is avoided, the eyes are effectively protected, the blue light prevention function and the photochromic function are combined into a whole, the cost is effectively reduced, and the photochromic protection film is widely applied to the field of display screen protection, such as flat-panel display screen protection paste, mobile phone protection paste and mobile phone tempering film.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. The utility model provides a photochromic protection film, its characterized in that, including the silicon that connects gradually from type layer, optics glue film, photochromic layer, substrate layer, silica gel layer and from type rete, photochromic layer is used for photochromic and absorbs blue light and absorbs the ultraviolet ray, optics glue film is used for bonding silicon from type layer with photochromic layer, the silica gel layer is used for bonding from type rete with the substrate layer.
2. The photochromic protective film of claim 1 wherein the substrate layer is one of a PET film, a PC film, and a PMMA film.
3. The photochromic protective film according to claim 1, wherein the silicone layer is an organic silicon pressure sensitive adhesive and has a peeling force of 1 to 800 g.
4. The photochromic protective film according to claim 1, wherein the thickness of the silicon release layer is 20 μm to 125 μm, the thickness of the optical adhesive layer is 20 μm to 250 μm, the thickness of the photochromic layer is 2 μm to 20 μm, the thickness of the substrate layer is 23 μm to 125 μm, the thickness of the silicon adhesive layer is 20 μm to 50 μm, and the thickness of the release film layer is 20 μm to 125 μm.
5. The photochromic protective film according to claim 1, wherein the total thickness of the optical adhesive layer, the photochromic layer, the substrate layer and the silica gel layer is 100 μm to 380 μm.
6. A method for preparing a photochromic protective film, which is characterized in that the photochromic protective film based on claim 1 comprises the following steps:
preparing a base material: selecting a substrate layer with the thickness of 23-125 microns for later use;
preparing a photochromic layer: coating the prepared photochromic coating liquid on the surface of the substrate layer, and performing heating curing or ultraviolet curing to form a photochromic layer to obtain a semi-finished substrate S1; the photochromic coating liquid comprises thermosetting resin, an ultraviolet absorbent, a thermal curing agent, a flatting agent, a blue light absorbent, a photochromic agent, an additive and a solvent;
preparing a silica gel layer: coating the prepared silica gel coating liquid on one surface, away from the photochromic layer, of the substrate layer in the semi-finished product substrate S1, heating, drying and curing to form a silica gel layer, and attaching a release film layer to the surface of the silica gel layer to obtain a semi-finished product substrate S2;
preparing an optical adhesive layer: and coating the prepared optical adhesive coating liquid on the photochromic layer in the semi-finished product substrate S2, performing thermal curing or ultraviolet curing to form an optical adhesive layer, and attaching a silicon release layer on the surface of the optical adhesive layer to obtain the finished product protective film.
7. The method for preparing a photochromic protective film according to claim 6 wherein the photochromic coating solution contains one or a mixture of two of spiropyran, benzopyran, spirooxazine, fulgide, fulgimide, spironaphthoxazine or its derivatives, naphthopyran or its derivatives.
8. The method for preparing a photochromic protective film according to claim 6, wherein the blue light absorber in the photochromic masking liquid comprises one or two of yellow pigment, yellow phosphor, nano zinc oxide, nano cerium oxide, nano SiO2, nano CdS and nano PbS.
9. The method for preparing a photochromic protective film according to claim 6, wherein the thermosetting resin in the photochromic coating liquid is one of acrylic epoxy resin, urethane acrylate resin, modified acrylic epoxy resin, modified epoxy resin and modified urethane acrylate resin.
10. The method for preparing a photochromic protective film according to claim 6, wherein the ultraviolet absorber in the photochromic coating solution can be one selected from phenyl salicylate, ultraviolet absorber UV-0, ultraviolet absorber UV-P, ultraviolet absorber UV-9, ultraviolet absorber UV-321, ultraviolet absorber UV-531 and ultraviolet absorber RMB.
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