CN106393903A - Protective film and preparation method thereof - Google Patents
Protective film and preparation method thereof Download PDFInfo
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- CN106393903A CN106393903A CN201610777682.6A CN201610777682A CN106393903A CN 106393903 A CN106393903 A CN 106393903A CN 201610777682 A CN201610777682 A CN 201610777682A CN 106393903 A CN106393903 A CN 106393903A
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- Prior art keywords
- layer
- protecting film
- pmma
- acrylic resin
- protective layer
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
- B32B27/365—Layered products comprising a layer of synthetic resin comprising polyesters comprising polycarbonates
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/12—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/14—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers
- B32B37/15—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with at least one layer being manufactured and immediately laminated before reaching its stable state, e.g. in which a layer is extruded and laminated while in semi-molten state
- B32B37/153—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with at least one layer being manufactured and immediately laminated before reaching its stable state, e.g. in which a layer is extruded and laminated while in semi-molten state at least one layer is extruded and immediately laminated while in semi-molten state
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
- B32B7/04—Interconnection of layers
- B32B7/06—Interconnection of layers permitting easy separation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
- B32B7/04—Interconnection of layers
- B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2255/00—Coating on the layer surface
- B32B2255/10—Coating on the layer surface on synthetic resin layer or on natural or synthetic rubber layer
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2255/00—Coating on the layer surface
- B32B2255/26—Polymeric coating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/40—Properties of the layers or laminate having particular optical properties
- B32B2307/412—Transparent
Abstract
The invention discloses a 2.5D protective film, which consists of a PET substrate 1, an organosilicon pressure-sensitive adhesive protective layer 2, a polyurethane acrylic resin hardened layer 3, a PMMA layer 5, a PC layer 6, an organosilicon pressure-sensitive adhesive protective layer 2 and a PET release film 7 from top to bottom in order. The contact surface of the PMMA layer 5 and the polyurethane acrylic resin hardened layer 3 is coated with a pretreatment priming coat 4, and the contact surface of the PC layer 6 and the organosilicon pressure-sensitive adhesive protective layer 2 is coated with a pretreatment priming coat 4. The invention also discloses a preparation method of the protective film. According to the invention, the good hot bending performance of PC/PMMA solves the solvent intolerance and poor adhesion problems of the PC surface, and by means of the low peel strength and high exhaust organosilicon pressure-sensitive adhesive, perfect combination of usability and high performance can be realized.
Description
Technical field
The present invention relates to a kind of safeguard film for cellular phone, more particularly, to a kind of 2.5D protecting film and preparation method thereof.
Background technology
With the popularization of curve screens, increasing mobile phone employs the cover-plate glass with cambered surface.Existing on market
Safeguard film for cellular phone be also required to there is hot bending shapping function to adapt to present mobile phone development.And existing PET protection film heat
Plasticity is poor, after hot pressing easily bounce-back it is difficult to molding.
For an above difficult problem, prior art substantially has three kinds of solutions：
1st, glass is made the shape of 2.5D arc, with AB glue, glass is fixed, this scheme is expensive, and glass is difficult to
Molding, complex process, yield is low.
2nd, the PET base material of protecting film is done thin, pressure-sensitive adhesive layer is thickeied plus viscous, makes protecting film firmly be fitted in mobile phone screen
On, this scheme leads to glue-line peeling force excessive, and easy cull, and venting quality difference is it has not been convenient to domestic consumer uses.
3rd, adopt soft base material, such as TPU, using the flexibility laminating cambered surface screen of soft material.This scheme soft material
It is difficult to control to be coated with tension force, yielding, and cure process can not be done in surface, scratch resistant property is poor, and soft material is difficult to be die cut.
Content of the invention
It is an object of the invention to provide a kind of 2.5D protecting film, using PC/PMMA good hot bending performance, solve PC face
The not problem of solvent resistant, poor adhesive force.
Further object is that providing a kind of preparation method of 2.5D protecting film.
In order to solve the problems, such as above-mentioned technology, the technical solution used in the present invention is：A kind of 2.5D protecting film, described protection
Film is followed successively by PET base material, silicone pressure sensitive compound protective layer, polyurethane acrylic resin hardened layer, PMMA layer, PC from top to bottom
Layer, silicone pressure sensitive compound protective layer, PET mould release membrance, the contact with described polyurethane acrylic resin hardened layer of described PMMA layer
Pretreatment priming coat is coated with face, described PC layer and the contact surface of described silicone pressure sensitive compound protective layer are coated with pretreatment
Priming coat.
Preferably, described pretreatment priming coat is made up of isopropanol, propylene glycol monomethyl ether and polyurethane acrylic resin.
Preferably, each thickness degree of described protecting film is：PET base material 15-75 μm, 5-15 μm of silicone pressure sensitive compound protective layer,
The gross thickness of 3-6 μm of polyurethane acrylic resin hardened layer, PMMA layer and PC layer is 100-200 μm, organic pressure-sensitive gel protection
Layer 20-60 μm, 25-75 μm of PET mould release membrance, 0.3-1 μm of pretreatment priming coat.
Preferably, described polyurethane acrylic resin hardened layer is made up of solvent and resin and light trigger, described molten
Agent be one or more of ethyl acetate, n-butyl acetate, toluene, PMA, butanone, IPA, ethanol mixture, described resin by
One of polyurethane acrylic resin composition of the polyurethane acroleic acid of single functionality and six degrees of functionality or two kinds of mixing compositions,
Described light trigger is 2- hydroxy-2-methyl -1- phenylacetone.
A kind of method preparing above-mentioned 2.5D protecting film, comprises the following steps：
(1), PC/PMMA base material pretreatment：After PC/PMMA base material co-extrusion, by way of anilox roll is coated with PC and
PMMA face is coated with pretreatment priming coat, after good for base material treatment, two-sided laminating PE film winding；
(2), polyurethane acrylic resin hardening bath coating：By the PMMA face of pretreated base material in step (1), pass through
The mode of anilox roll coats hardening bath；
(3), it is coated with add-on type liquid silicone pressure sensitive compound protective layer：The another side of the base material that step (2) is handled well applies
Cloth additional organosilicon pressure sensitive adhesive, and pass through doubling roller, mould release membrance is fitted on described pressure-sensitive compound protective layer, winding；
(4) laminating protecting film：In the one layer of organic pressure-sensitive gel protecting film of PMMA face laminating having hardened.
Preferably, pretreatment priming coat described in step (1) is by isopropanol, propylene glycol monomethyl ether and polyurethane acrylic resin
Composition.
Preferably, in step (2), described polyurethane acrylic resin hardening bath is by solvent and resin and light trigger group
Become, described solvent is one or more of ethyl acetate, n-butyl acetate, toluene, PMA, butanone, IPA, ethanol mixture,
Described resin one of is made up of the polyurethane acroleic acid of single functionality and the polyurethane acrylic resin of six degrees of functionality or two
Plant mixing composition, described light trigger is 2- hydroxy-2-methyl -1- phenylacetone.
Preferably, described polyurethane acrylic resin hardening bath is by weight by the solvent of 40-80 part, 20-60 part
The light trigger composition of resin and 0.3-1 part.
Preferably, in step (2), between a diameter of 20-100mm of anilox roll line number, line number is chosen as 20-200LPI, control
System coating build is 3-6 μm.
Preferably, in step (3) THICKNESS CONTROL of silicone pressure sensitive compound protective layer at 20-60 μm.
After PC/PMMA base material co-extrusion, surface dynes value is very low, and common glue and hardening bath are difficult to coat, and PC base material
Solvent resistance itself is poor, when contacting ethyl acetate, n-butyl acetate, toluene equal solvent, face can be led to send out mist it is therefore desirable to
Pretreatment is done in itself to base material.
With technical scheme, have the advantages that：1st, composite light transmittance is high, and mist degree is low, improves
Visual experience；2nd, protecting film good forming ability, production yield is high；3rd, organic pressure-sensitive gel remains good venting quality, fits
Close ordinary consumer to use.
Brief description
Accompanying drawing described herein is used for providing a further understanding of the present invention, constitutes the part of the application, not
Constitute inappropriate limitation of the present invention, in the accompanying drawings：
Fig. 1 is the structural representation of 2.5D protecting film of the present invention.
Specific embodiment
To describe the present invention, the illustrative examples of the here present invention below in conjunction with accompanying drawing and specific embodiment in detail
And explanation is used for explaining the present invention, but not as a limitation of the invention.
As shown in figure 1, a kind of 2.5D protecting film, described protecting film is followed successively by PET base material 1, silicone pressure sensitive from top to bottom
Compound protective layer 2, polyurethane acrylic resin hardened layer 3, PMMA (polymethyl methacrylate) layer 5, PC (Merlon) layer 6,
Silicone pressure sensitive compound protective layer 2, PET mould release membrance 7, the contact with described polyurethane acrylic resin hardened layer 4 of described PMMA layer 5
Pretreatment priming coat 4 is coated with face, described PC layer 6 and the contact surface of described silicone pressure sensitive compound protective layer 2 is coated with pre-
Process priming coat 4.
Specifically, described pretreatment priming coat 4 is made up of isopropanol, propylene glycol monomethyl ether and polyurethane acrylic resin.
Specifically, 2.5D protecting film each thickness degree of the present invention is：PET base material 15-75 μm, silicone pressure sensitive compound protective layer
5-15 μm, the gross thickness of 3-6 μm of polyurethane acrylic resin hardened layer, PMMA layer and PC layer be 100-200 μm, silicone pressure sensitive
20-60 μm of compound protective layer, 25-75 μm of PET mould release membrance, 0.3-1 μm of pretreatment priming coat.
As a preferred embodiment of the present invention, described polyurethane acrylic resin hardened layer by solvent and resin with
And light trigger composition, described solvent be one of ethyl acetate, n-butyl acetate, toluene, PMA, butanone, IPA, ethanol or
Several mixture, during described resin is made up of the polyurethane acroleic acid of single functionality and the polyurethane acrylic resin of six degrees of functionality
One or two mixing composition, described light trigger be 2- hydroxy-2-methyl -1- phenylacetone.
The preparation method of the 2.5D protecting film of the present invention, specifically includes following steps：
(1), PC/PMMA base material pretreatment：After PC/PMMA base material co-extrusion, by way of anilox roll is coated with PC and
PMMA face is coated with pretreatment priming coat, after good for base material treatment, two-sided laminating PE film winding；After PC/PMMA base material co-extrusion, surface
Dyne value is very low, and common glue and hardening bath are difficult to coat, and PC base material solvent resistance itself is poor, contact ethyl acetate,
When n-butyl acetate, toluene equal solvent, face can be led to send out mist it is therefore desirable to do pretreatment in itself to base material；Specifically, described
Pretreatment priming coat is made up of isopropanol, propylene glycol monomethyl ether and polyurethane acrylic resin.
(2), polyurethane acrylic resin hardening bath coating：By the PMMA face of pretreated base material in step (1), pass through
The mode of anilox roll coats hardening bath；Specifically, in step (2), described polyurethane acrylic resin hardening bath is by solvent and tree
Fat and light trigger composition, described solvent is ethyl acetate, n-butyl acetate, toluene, PMA, butanone, IPA, in ethanol one
Kind or several mixture, the polyurethane acrylic resin group of the polyurethane acroleic acid by single functionality for the described resin and six degrees of functionality
One of one-tenth or two kinds of mixing compositions, described light trigger is 2- hydroxy-2-methyl -1- phenylacetone.
Specifically, described polyurethane acrylic resin hardening bath is by weight by the solvent of 40-80 part, 20-60 part
The light trigger composition of resin and 0.3-1 part.
Specifically, between a diameter of 20-100mm of anilox roll line number, line number is chosen as 20-200LPI, controls coating dry film
Thickness is 3-6 μm.
(3), it is coated with add-on type liquid silicone pressure sensitive compound protective layer：The another side of the base material that step (2) is handled well applies
Cloth additional organosilicon pressure sensitive adhesive, and pass through doubling roller, mould release membrance is fitted on described pressure-sensitive compound protective layer, winding；Specifically
, the THICKNESS CONTROL of silicone pressure sensitive compound protective layer is at 20-60 μm.
(4) laminating protecting film：In the one layer of organic pressure-sensitive gel protecting film of PMMA face laminating having hardened.
The technology of the present invention PC/PMMA good hot bending performance, solves the problems, such as PC face not solvent resistant, poor adhesive force, passes through
Low stripping force, the organic pressure-sensitive gel of high venting quality are it is achieved that ease for use and high performance perfect adaptation.
With technical scheme, also have the advantages that：1st, composite light transmittance is high, and mist degree is low, carries
High visual experience；2nd, protecting film good forming ability, production yield is high；3rd, organic pressure-sensitive gel remains good venting quality,
Suitable ordinary consumer uses.
The technical scheme above embodiment of the present invention being provided is described in detail, specific case used herein
The principle and embodiment of the embodiment of the present invention is set forth, the explanation of above example is only applicable to help understand this
The principle of inventive embodiments；Simultaneously for one of ordinary skill in the art, according to the embodiment of the present invention, in specific embodiment party
All will change in formula and range of application, in sum, this specification content should not be construed as limitation of the present invention.
Claims (10)
1. a kind of 2.5D protecting film it is characterised in that：Described protecting film is followed successively by PET base material, organic pressure-sensitive gel from top to bottom
Protective layer, polyurethane acrylic resin hardened layer, PMMA layer, PC layer, silicone pressure sensitive compound protective layer, PET mould release membrance, described
Pretreatment priming coat is coated with the contact surface of PMMA layer and described polyurethane acrylic resin hardened layer, described PC layer with described
Pretreatment priming coat is coated with the contact surface of silicone pressure sensitive compound protective layer.
2. a kind of 2.5D protecting film according to claim 1 it is characterised in that：Described pretreatment priming coat by isopropanol,
Propylene glycol monomethyl ether and polyurethane acrylic resin composition.
3. a kind of 2.5D protecting film according to claim 1 it is characterised in that：The thickness of described protecting film is：PET base material
15-75 μm, 5-15 μm of silicone pressure sensitive compound protective layer, 3-6 μm of polyurethane acrylic resin hardened layer, PMMA layer and PC layer total
Thickness is 100-200 μm, 20-60 μm of silicone pressure sensitive compound protective layer, 25-75 μm of PET mould release membrance, pretreatment priming coat 0.3-1 μ
m.
4. a kind of 2.5D protecting film according to claim 1 it is characterised in that：Described polyurethane acrylic resin hardened layer
Be made up of solvent and resin and light trigger, described solvent be ethyl acetate, n-butyl acetate, toluene, PMA, butanone, IPA,
One or more of ethanol mixture, the polyurethane third of the polyurethane acroleic acid by single functionality for the described resin and six degrees of functionality
One of olefin(e) acid resin composition or two kinds of mixing compositions, described light trigger is 2- hydroxy-2-methyl -1- phenylacetone.
5. a kind of method of the 2.5D protecting film prepared described in claims 1 to 3 any one is it is characterised in that include following
Step：
(1), PC/PMMA base material pretreatment：After PC/PMMA base material co-extrusion, in PC and PMMA face by way of anilox roll is coated with
Coating pretreatment priming coat, after good for base material treatment, two-sided laminating PE film winding；
(2), polyurethane acrylic resin hardening bath coating：By the PMMA face of pretreated base material in step (1), by reticulate pattern
The mode of roller coats hardening bath；
(3), it is coated with add-on type liquid silicone pressure sensitive compound protective layer：The another side coating of the base material that step (2) is handled well adds
Molding organic pressure-sensitive gel, and pass through doubling roller, mould release membrance is fitted on described pressure-sensitive compound protective layer, winding；
(4) laminating protecting film：In the one layer of organic pressure-sensitive gel protecting film of PMMA face laminating having hardened.
6. a kind of 2.5D protecting film according to claim 4 preparation method it is characterised in that：Pre- described in step (1)
Process priming coat to be made up of isopropanol, propylene glycol monomethyl ether and polyurethane acrylic resin.
7. a kind of 2.5D protecting film according to claim 4 preparation method it is characterised in that：In step (2), described poly-
Urethane acrylate resin hardening bath is made up of solvent and resin and light trigger, and described solvent is ethyl acetate, the positive fourth of acetic acid
One or more of ester, toluene, PMA, butanone, IPA, ethanol mixture, described resin is by the polyurethane propylene of single functionality
One of polyurethane acrylic resin composition of acid and six degrees of functionality or two kinds of mixing compositions, described light trigger is 2- hydroxyl
Base -2- methyl isophthalic acid-phenylacetone.
8. a kind of 2.5D protecting film according to claim 7 preparation method it is characterised in that：Described polyurethane acroleic acid
Hardening of resin liquid is made up of the light trigger of the solvent of 40-80 part, the resin of 20-60 part and 0.3-1 part by weight.
9. a kind of 2.5D protecting film according to claim 4 preparation method it is characterised in that：In step (2), anilox roll
Between a diameter of 20-100mm of line number, line number is chosen as 20-200LPI, controls coating build to be 3-6 μm.
10. a kind of 2.5D protecting film according to claim 4 preparation method it is characterised in that：Organosilicon in step (3)
The THICKNESS CONTROL of pressure-sensitive compound protective layer is at 20-60 μm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201610777682.6A CN106393903A (en) | 2016-08-31 | 2016-08-31 | Protective film and preparation method thereof |
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| CN201610777682.6A CN106393903A (en) | 2016-08-31 | 2016-08-31 | Protective film and preparation method thereof |
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| CN201610777682.6A Pending CN106393903A (en) | 2016-08-31 | 2016-08-31 | Protective film and preparation method thereof |
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Cited By (14)
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| CN107253383A (en) * | 2017-04-28 | 2017-10-17 | 东莞市纳利光学材料有限公司 | A kind of hot bending film and preparation method thereof |
| CN108251009A (en) * | 2018-02-09 | 2018-07-06 | 惠州市摩码菱丽光电材料有限公司 | A kind of shock resistance e-book screen and preparation method thereof |
| CN109456711A (en) * | 2018-10-11 | 2019-03-12 | 江苏斯迪克新材料科技股份有限公司 | Thermal finalization protective film for camber display screen |
| CN109456713A (en) * | 2018-12-21 | 2019-03-12 | 深圳市摩码科技有限公司 | A kind of ABS screen protecting film and preparation method thereof |
| CN109504305A (en) * | 2018-12-14 | 2019-03-22 | 惠州市摩码菱丽光电材料有限公司 | A kind of peep-proof soft glass film and preparation method thereof |
| CN111320941A (en) * | 2018-12-17 | 2020-06-23 | 浙江欣麟新材料技术有限公司 | High-strength screen lower fingerprint identification photoelectric protective film with self-repairing function on surface |
| CN111320944A (en) * | 2018-12-17 | 2020-06-23 | 浙江欣麟新材料技术有限公司 | Photoelectric protective film for identifying fingerprints under screen and preparation method thereof |
| CN111334209A (en) * | 2018-12-19 | 2020-06-26 | 浙江欣麟新材料技术有限公司 | High-strength photoelectric protective film for identifying fingerprints under screen and preparation method thereof |
| CN111334208A (en) * | 2018-12-19 | 2020-06-26 | 浙江欣麟新材料技术有限公司 | High-strength photoelectric protective film for identifying fingerprints under screen and preparation method thereof |
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| CN112608668A (en) * | 2020-12-16 | 2021-04-06 | 江阴通利光电科技有限公司 | Transparent base film hardened coating protective film for folding screen and production process |
| CN112659692A (en) * | 2020-12-07 | 2021-04-16 | 苏州奥美材料科技有限公司 | High-transparency ultrathin weather-resistant acrylic film and preparation method thereof |
| CN112852332A (en) * | 2019-11-28 | 2021-05-28 | 湖南尚鑫新材料科技有限公司 | Scratch-resistant protective film and preparation method thereof |
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| CN111334209A (en) * | 2018-12-19 | 2020-06-26 | 浙江欣麟新材料技术有限公司 | High-strength photoelectric protective film for identifying fingerprints under screen and preparation method thereof |
| CN109456713A (en) * | 2018-12-21 | 2019-03-12 | 深圳市摩码科技有限公司 | A kind of ABS screen protecting film and preparation method thereof |
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Application publication date: 20170215 |