CN214830097U - Photochromic protective film - Google Patents
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- CN214830097U CN214830097U CN202120277745.8U CN202120277745U CN214830097U CN 214830097 U CN214830097 U CN 214830097U CN 202120277745 U CN202120277745 U CN 202120277745U CN 214830097 U CN214830097 U CN 214830097U
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Abstract
The utility model relates to a photochromic protection film, including the silicon that connects gradually from type layer, optics glue film, photochromic layer, substrate layer, silica gel layer and from the type rete, photochromic layer is used for photochromic, and absorbs blue light and absorbs the ultraviolet ray, and optics glue film is used for bonding silicon from type layer and photochromic layer, and the silica gel layer is used for bonding from type rete and substrate layer. This photochromic protection film connects gradually silicon is from the type layer, the optics glue film, photochromic layer, the substrate layer, the silica gel layer reaches from the type rete, not only can filter the blue light that comes from the display screen, improve and prevent the blue light rate, ultraviolet resistance's effect, but also can be along with the strong and weak transmissivity of automatically regulated visible light of light, avoid outdoor highlight to feel the stinging that the reflection on screen surface caused to people's eye, effectively protect eyes, still will prevent blue light and photochromic function and unite two into one, the effectual cost that reduces, wide application is in display screen and is protected the field.
Description
Technical Field
The utility model relates to a protection film technical field especially relates to a photochromic protection film.
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.
SUMMERY OF THE UTILITY MODEL
In view of the above, it is desirable to provide a photochromic protective film having a simple structure and capable of automatically adjusting transmittance.
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 silicon release layer is made of PET, and the surface of the PET is coated with a silicon release agent.
In one embodiment, the optical adhesive layer is a photo-curable pressure-sensitive adhesive or a thermal-curable pressure-sensitive adhesive.
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 release film layer is a PET base film.
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 photochromic layer is adhered to the substrate layer in a coating and curing mode, the optical adhesive layer is adhered to the photochromic layer in a coating and curing mode, and the silica gel layer is adhered to the substrate layer in a coating and curing mode.
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.
Compared with the prior art, the beneficial effects of the utility model are as follows:
the utility model discloses a silicon that photochromic protection film connected gradually is from the type layer, the optical cement layer, photochromic layer, the substrate layer, the silica gel layer reaches from the type rete, not only can filter the blue light that comes from the display screen, improve and prevent the blue light rate, ultraviolet resistance's effect, but also can be along with the strong and weak transmissivity of automatically regulated visible light of light, avoid outdoor highlight to feel the stinging that the reflection on screen surface caused to people's eye, effectively protect eyes, still will prevent blue light and photochromic function unite two into one, the effectual cost that reduces, wide application in display screen protects the field.
Drawings
Fig. 1 is a schematic structural view of a photochromic protective film according to a preferred embodiment of the present 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 to facilitate understanding of the present invention, the present invention will be described more fully below. The 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.
Please refer to fig. 1, for the utility model relates to a photochromic protection film 100 of preferred embodiment, including the silicon that connects gradually from type layer 10, optical adhesive layer 20, photochromic layer 30, substrate layer 40, silica gel layer 50 and from type rete 60, the utility model discloses a silicon that photochromic protection film 100 connects gradually is from type layer 10, optical adhesive layer 20, photochromic layer 30, substrate layer 40, silica gel layer 50 and from type rete 60, not only can filter the blue light that comes from the display screen, improves and prevents blue light rate, ultraviolet resistance's effect, but also can be along with the power of light and the transmissivity of automatically regulated visible light, avoid outdoor highlight to the tingle sense that the reflection on screen surface caused people's eye, effectively protect eyes, still will prevent blue light and photochromic function and unite two into one, the effectual cost that reduces, the wide application is in display screen and is protected the field.
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 utility model discloses a silicon that photochromic protection film 100 connected gradually is from type layer 10, optical cement layer 20, photochromic layer 30, the substrate layer 40, silica gel layer 50 reaches from type rete 60, not only can filter the blue light that comes from the display screen, improve and prevent the blue light rate, ultraviolet resistance's effect, but also can be along with the power of light (sunlight or ultraviolet ray) and the transmissivity of automatically regulated visible light, can resume to initial condition again under the condition of no light irradiation, make screen light soft, prevent eye fatigue, avoid outdoor highlight to feel the stinging that the reflection on screen surface caused people's eye, effectively protect eyes, still will prevent blue light and photochromic function unite two into one, the effectual cost that has reduced, wide application in display screen protection field, like flat panel display screen protection subsides, cell-phone tempering membrane.
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 represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (9)
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, 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 silicon release layer is made of PET, and the surface of the PET is coated with a silicon release agent.
3. The photochromic protective film of claim 1 wherein the optical adhesive layer is a photo-curable pressure-sensitive adhesive or a thermo-curable pressure-sensitive adhesive.
4. The photochromic protective film of claim 1 wherein the substrate layer is one of a PET film, a PC film, and a PMMA film.
5. 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.
6. The photochromic protective film according to claim 1, wherein the release film layer is a PET base film.
7. 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.
8. The photochromic protective film according to claim 1, wherein the photochromic layer is bonded to the substrate layer by coating and curing, the optical adhesive layer is bonded to the photochromic layer by coating and curing, and the silica gel layer is bonded to the substrate layer by coating and curing.
9. 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.
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