CN101269561A - Surface protecting layer - Google Patents
Surface protecting layer Download PDFInfo
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- CN101269561A CN101269561A CNA200710064705XA CN200710064705A CN101269561A CN 101269561 A CN101269561 A CN 101269561A CN A200710064705X A CNA200710064705X A CN A200710064705XA CN 200710064705 A CN200710064705 A CN 200710064705A CN 101269561 A CN101269561 A CN 101269561A
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Abstract
The invention relates to a sealer, in particular to a structure and a method for raising sealer hardness. The sealer of the invention comprises as least two coatings: a thermoplastic layer and a hardened layer, the thermoplastic layer is composed of one or a plurality of coatings, aggregate thickness is from 3Mum to 30Mum, and the thermoplastic layer must have thermoplastic characteristic and non cracking characteristic while thermo-compression stretch forming; the hardened layer is composed of one or a plurality of coatings, the aggregate thickness is from 3Mum to 30Mum, the hardened layer must have the non cracking characteristic while thermo-compression stretch forming, and then the hardened layer can finish hardening through a light struck method to form and show final chemical solvent resistance and scuffing resistance characteristics. The sealer can be used or shifted on an injection forming or thermo-compression stretch forming object and the hardened layer is outward, which causes the injection forming or thermo-compression stretch forming object to strengthen case hardness and carry out thermo-compression forming processing.
Description
Technical field
The invention belongs to the sealer technical field.
Background technology
In traditional ejecting forming decoration in mould process, [be referred to as IMD again, with reference to Nakamura, Y., United States Patent 5,993,588 (1999), The Injection Molding of QualityParts:ATI 1147e Process Engineering Alternatives and Process Selection, Bayer Corporation], pattern is to be printed on earlier on the carrier thin film, is passed on the moulding object through heating; Primary structure on the heat transfer write film comprises the carrier thin film that mylar (PET) is become, and carrier thin film with the mould release coating, carries out the coating and the printing of difference in functionality or figure layer earlier above again.
The ejecting forming decoration in mould process of another kind of mode is to put into formable film to use and (be referred to as FIM again, insert film in the mould, with reference to The Injection Molding of Quality Parts:ATI1147e Process Engineering Alternatives and Process Selection, BayerCorporation), the beginning process is to use through printing or finishes the hot plastic molding film that colouring has decorative effect, through cutting into sheet, hot briquetting again, become the shape objects of final hope, thereafter deburring and inserting in the jetting mold die cavity is again penetrated Overmolded to finish with compatible plastics.
Also can utilize the heat transfer write film or the hot plastic molding film of printed patterns in addition, but cover on the heat molding base, hot-forming to be made for the shape objects of final hope.
Usually in portable electronic product, the appearance surfaces of object needs hard protective layer, the scratch of its energy chemicals-resistant erosion and anti-article or nail.It is to re-use spraying method hardened layer is coated with up after the manufacturing of object profile is finished that a kind of mode is arranged traditionally, but the pollution that the method processing procedure is loaded down with trivial details, yield is low and can produce solvent air, this is a kind of tool environmental pollution and expensive processing procedure of spending, and bad when being used in complex contour, large tracts of land object.Another kind of convenient select be at IMD or FIM before thermoforming; on heat transfer write film or hot plastic molding film, form the protective layer coating earlier; make its dry tack free or partly sclerosis make not after tack (B stage) of surface, and this protective layer characteristic that after having stretching between the thermoforming stage, can not chap.The highest hardness of this protective layer is subjected to draw ratio to limit (more than 1.2) at Bstage.Then or transcription to the moulding object, this B stage protective layer can be finished hardening characteristics (pansclerosis C stage) through the light irradiation and show final chemically-resistant solvent and scoring resistance matter (showing with the pencil hardness grade) with formation.Must have hardness at B stage protective layer and make not after tack and can carry out subsequent treatment of surface; yet when also being limited in pansclerosis (C stage), this penetrates the activity between the macromolecule that must harden fully and the efficient of hardening through illumination; because the final of protective layer shows that hardness is after pansclerosis (C stage) is finished, this function is relying on stretchings do not chapped when the Bstage thermoforming characteristics and is matching each other and finish in the mechanism of pansclerosis (C stage).To be that the highest pencil hardness grade of commercial volume production product (greatly draw ratio: more than 1.2) of base material is HB with Merlon (PC) at present, use this method can increase hardness and reach 2H or higher.More than be the disappearance of prior art maximum, the real difficult problem that overcomes demanded urgently for industry.
Summary of the invention
The present invention's main purpose can be used on ejection formation or the hot-forming object providing a kind of; make it can strengthen the sealer that case hardness can be carried out hot-forming processing again, this protective layer can use or be passed on ejection formation or the hot-forming object.
To achieve these goals, the invention provides following technical scheme:
A kind of sealer, wherein: when being used for thermoplastic shaping film coated protective layer, it mainly comprises at least two layers of coating:
Thermoplastic layer: be adjacent to the thermoplastic shaping base material, by one or most possess thermoplasticity and the coating of the characteristic that do not chap when the hot pressing drawing and forming is formed, gross thickness is 3 μ m～30 μ m;
Hardened layer: by one or most possess the characteristic that do not chap when the hot pressing drawing and forming, and can be formed through the coating that illumination shoots away into sclerosis, gross thickness is 3 μ m～30 μ m.
A kind of sealer, wherein: have the scratch resistant sclerosis protective layer of transferability energy, coat on the mould release membrance, it is made up of two layers of coating at least:
Hardened layer: be adjacent on the mould release membrance, possess the characteristic that do not chap when the hot pressing drawing and forming by one layer or more, can form through the coating that illumination shoot away into sclerosis then, gross thickness is 3～30 μ m;
Thermoplastic layer: be made up of one layer or more tool plasticity and coating that can not chap when stretching when the thermoforming, gross thickness is 3～30 μ m.
Beneficial effect of the present invention is:
A kind of being applied on ejection formation or the hot-forming object; carry out the coating of scratch resistance protective layer; make it can strengthen case hardness and can carry out hot-forming processing again; this sealer can use or be passed on ejection formation or the hot-forming object; when the processing procedure deep forming; crack performance in the time of can avoiding protecting face to stretch, and reach the effect that improves production yield, efficient, colorize and reduce environmental pollution.
Brief description of drawings
Fig. 1 is an embodiment of the invention cut-away view.
Fig. 2 is another embodiment of the present invention cut-away view.
[main description of reference numerals]
(A) thermoplastic layer
(B) thermoplastic shaping base material
(C) hardened layer
(D) hardened layer
(E) mould release membrance
(F) thermoplastic layer
The specific embodiment
The present invention can significantly strengthen having the protective layer of hardness, has the structure more than at least two layers, comprises the hardened layer that uses illumination to penetrate to form protective layer and forms the thermoplastic layer of protective layer with thermoplasticity, also has when stretching not chap and hardness is arranged when thermoforming.Thermoplastic layer adequate thickness (more suitable is 3～30 μ m) will be arranged and than the harder protective layer hardness that just can improve of thermoforming PC base material to real last hardness (more than the HB).Thermoplastic layer has two mechanisms that can strengthen being coated with diaphragm hardness; first: the basic hardness of thermoplastic layer can be strengthened the hardness of Global Macros film; second: when thermoforming, when making big draw ratio (more than 1.2), thermoplastic layer has the function of buffering to the stretching of hardened layer.Like this result, the real draw ratio of hardened layer is below 1.2 and can not chap.Therefore we can not have the risk of be full of cracks with harder coating.The condition that other thermoplastic layer resin is selected for use:
1. be lower than the softening temperature of hot-forming temperature, could also have when thermoforming when stretching and not chap, it is according to being different substrate materials and determining; For example the PC hot-forming temperature is 120～150 ℃, and the softening temperature of thermoplastic layer resin is more suitable to be 90～110 ℃.
2. then good with the coating that is touched.
3. refractive index should just can reduce the light interference and increase light transmittance between base material and appearance coating material.
4. when hardened layer is penetrated in illumination good stability to be arranged in pansclerosis (C stage).
Additive can add in the thermoplastic layer, to increase the usefulness of protective layer; Powder that filler is for example inorganic or organic such as silica flour can more strengthen hardness, other functional additive can comprise that the stabilization agent of anti-light, heat resistanceheat resistant, ultraviolet ray obstruct agent, look mother, crosslinking agent or the like, but the hardness of thermoplastic layer also mat after coating with light or hot partial cross-linking improving, and do not chap when stretching; But its softening temperature still will be lower than hot-forming temperature.
Hardened layer must be dry or partly sclerosis make its surface fully can after tack, in order to successive process operation (B stage).In addition, hardened layer has stretch function and does not chap when thermoplastic shaping; After last hardened layer is penetrated via heat or illumination fully sclerosis (C stage) make it have chemicals-resistant to corrode and resistance to scraping.In the present invention, the irradiation that comprises ultraviolet (UV) or electron beam (EB) or gamma bundle is penetrated in illumination.
For reaching the technological means of the aforementioned purpose of the present invention, enumerate an embodiment now, and cooperate graphic explanation as after, can by the method to the present invention, feature and the effect of being reached, obtain better understanding.
See also shown in Figure 1, sealer of the present invention, when applying to thermoplastic shaping film coated protective layer, it mainly comprises at least two layers of coating:
Thermoplastic layer (A): be adjacent to thermoplastic shaping base material (B), by one or most coating formed, gross thickness is 3 μ m～30 μ m, this coating must possess the thermoplasticity and the characteristic that do not chap when the hot pressing drawing and forming;
Hardened layer (C): by one or most coating formed, gross thickness is 3 μ m～30 μ m, this coating must possess the characteristic that do not chap when the hot pressing drawing and forming.Hardened layer can inject row sclerosis (C stage) via illumination at last makes it have chemicals-resistant erosion and resistance to scraping.
The manufacture process of the thermoplastic shaping film (B stage) that chemical resistance erosion of the present invention's energy and tool are anti-scratch is as follows:
On the thermoplastic film base material, coating and the dry thermoplastic layer that forms.The overlapping hardened layer that is coated with on thermoplastic layer, make its dry tack free or partly sclerosis want can be fully after tack not, could go subsequent job.Under can selecting, thermoplastic layer, hardened layer can use slit coating, drench the membrane type coating, finish simultaneously with single coating mode or multi-layer coated mode or comprehensive above-mentioned coating method.On hardened layer, can fit or be coated with have defencive function diaphragm to prevent the scratch in the processing procedure.If needs are arranged, also can fit or coating has the diaphragm of defencive function, to prevent base material scratch in the processing procedure tossing about of film.
Usually, print at the back side of the diaphragm coating layer of plastic molding film or the processing of pattern, the diaphragm coating also can extrude the pattern of hope via thermal pressure simultaneously.
Utilize above-mentioned B stage thermoplastic shaping film two kinds of modes to be arranged to make article:
First kind is after allowing mould and thermoplastic shaping film all arrive the preheating forming temperature, adds to depress via pull of vacuum or mold to make the thermoplastic shaping film forming.Utilization light is radiated on the aforementioned Bstage thermoplastic shaping film, and protective layer is hardened fully.Be placed in again in the die cavity of Jet forming machine; the one side that has protective layer contacts with mould; resin that the injection preheating is finished and preform inner face are combined into one and form the shape that has hardness and can not be out of shape, and this moulding object surface can be corroded and the tool resistance to scraping by chemical resistance.
Second kind is under the hot-forming temperature operation, puts B stage thermoplastic shaping film on molded object, again via vacuum or pressure operation mode, this thermoplastic shaping film and moulding object is combined into one.Use illumination to penetrate on the moulding object then with the protective layer that hardens fully.
In addition, the protective layer of B stage thermoplastic shaping film also can be according to having embossing pattern surface when the thermoforming process on the die surface, touches protective layer and form desirable pattern.
Please consult shown in Figure 2ly again, another embodiment of the present invention is for having the scratch resistant sclerosis protective layer of transferability energy, and it is to coat on the mould release membrance, and is made of two layers of coating at least:
Hardened layer (D) is adjacent on the mould release membrance (E), is made up of the one layer or more coating, and gross thickness is 3～30 μ m; This coating can not chap when stretching when thermoforming, and hardened layer can inject row sclerosis (C stage) via illumination at last makes it have chemicals-resistant erosion and resistance to scraping.
Thermoplastic layer (F) is made up of the one layer or more coating, and gross thickness is 3～30 μ m, and this coating must possess thermoplasticity and the characteristic that do not chap when the hot pressing drawing and forming;
For increasing the easy adhesion property of scratch resistant sclerosis protective layer, a kind of dope layer of the transparency can be added on the thermoplastic layer, is easy to adhere in the hope of pattern or printing-ink and moulding object resin.
The manufacture process of scratch resistant sclerosis protective layer that the present invention has the transferability energy is as follows:
Coating generates one or most hardened layer coating on mould release membrance, make its dry tack free or partly sclerosis (B stage) want can be fully after tack not;
Overlapping coating and dry formation one or most thermoplastic layer coating on hardened layer are to make the transferability energy heat transfer write film that possesses B stage protective layer on mould release membrance, to carry out subsequent job.
Utilize above-mentioned transferability to make article two kinds of modes to be arranged by the heat transfer write film:
First kind be make on putting this mould release membrance the transferability of B stage protective layer can the heat transfer write film in the die cavity of Jet forming machine, B stage protective layer places the inboard;
Injecting resin makes resin and this B stage protective layer be combined into one and moulding;
Treat that this B stage protective layer is passed on the moulding object, remove mould release membrance, use illumination to penetrate B stage protective layer on the moulding object with the protective layer that hardens fully (C stage).
Second kind is to face and the contact moudling object with the B stage protective layer on the transferability energy heat transfer write film; under the hot-forming temperature operation; again via vacuum or pressure operation mode; transfer B stage protective layer is to the moulding object and be combined as a whole; remove mould release membrance again, use illumination to penetrate on the moulding object then with the protective layer that hardens fully (C stage).
Truly feasible for proving the present invention, the spy provides checking, and its test method is as follows:
1. coating hardness: coating is coated in earlier on the thermoforming base material (for example PC film), then in pencil hardness: ASTM D3363-74,500g loading test;
2. chemical-resistant: after finishing C-stage illumination and shooting away pansclerosis; use about 30mgEAC (ethyl acetate) solvent to drip to protective layer; allow it to stagnate air dry in 25 ℃ air at room temperature (generally at least 5 minutes), whether the surface of inspecting protective layer has slight corrosion or atomizing situation to produce.
3. crack resistance: the anti-be full of cracks characteristic when thermoforming, earlier with hot blast or infrared heater with the film surface preheating made in 50 seconds reach 130 ℃ after, film after the preheating is placed in about 60 seconds in the hot forming tool that is heated to 130 ℃, removes hot forming tool and check whether maximal draw ratio position (draw ratio: more than 1.2) has the be full of cracks situation;
Example 1
Use 175 μ m PC polycarbonate films (Bayer DE1-1), be coated with the thermoplastic layer of the polymethyl methacrylate (PMMA) of the about 7 μ m thickness of ground floor earlier, the acryl that re-uses tool ultraviolet ray irradiation sclerosis afterwards is that coating is coated with the hardened layer of about 10 μ m thickness on ground floor coating.Depress via mold heated and to make the thermoplastic shaping film forming.Equivalent irradiation diaphragm coating layer with the about 500mJ/ square centimeter of mercury formula ultraviolet lamp makes sclerosis fully again.
Example 2
With example 1, the coating thickness of the ground floor PMMA that only changes is 12 μ m.
Comparative examples A
Use 175 μ m PC films, have only coating 7 μ m PMMA coatings.
Comparative example B
Use 175 μ m PC films, have only coating 12 μ m PMMA coatings.
Comparative example C
With example 1, but be not coated with the PMMA coating.
Its result of the test such as following table, it is truly feasible to demonstrate,prove the present invention:
| Illustration | Thermoplastic layer | Hardened layer | Coating hardness | Chemical-resistant | Crack resistance |
| The PC film | - | - | 4B | Very poor | Good |
| Comparative examples A | 7 | - | 2B | Very poor | Good |
| Comparative example B | 12 | - | B | Very poor | Good |
| Comparative example C | - | 10 | HB | Good | Good |
| Example 1 | 7 | 10 | H | Good | Good |
| Example 2 | 12 | 10 | 2H | Good | Good |
Only the above, only being one of the present invention preferable possible embodiments, is not the scope in order to limitation the present invention, is familiar with this skill personage such as, the substituting manufacture method of using specification of the present invention and claim to do ought to be included in the present invention's the claim.
Claims (16)
1. sealer is characterized in that: when being used for thermoplastic shaping film coated protective layer, comprise that two layers of coating are as follows at least:
Thermoplastic layer: be adjacent to the thermoplastic shaping base material, by one or most possess thermoplasticity and the coating of the characteristic that do not chap when the hot pressing drawing and forming is formed, gross thickness is 3 μ m～30 μ m;
Hardened layer: by one or most possess the characteristic that do not chap when the hot pressing drawing and forming, and can be formed through the coating that illumination shoots away into sclerosis, gross thickness is 3 μ m～30 μ m.
2. sealer according to claim 1 is characterized in that: the softening temperature point of this thermoplastic layer material must be lower than the mould design temperature when hot-forming.
3. sealer according to claim 1 is characterized in that: the surface of this hardened layer must be dry or partly sclerosis want can be fully after tack not, sclerosis fully after hardened layer can be penetrated via illumination at last has chemicals-resistant and corrodes and resistance to scraping.
4. sealer according to claim 1 is characterized in that: fit on hardened layer or coating has the diaphragm of scratch that is used for preventing processing procedure of defencive function.
5. sealer according to claim 1 is characterized in that: the tossing about of this film fitted or coating has the diaphragm that is used for preventing the scratch of processing procedure base material of defencive function.
6. a thermoplastic shaping thinfilm protective coating manufacture method is characterized in that: comprise the following steps:
On the thermoplastic shaping film substrate, coating and dry formation one or most thermoplastic layer coating;
Overlapping coating generates one or most hardened layer coating on thermoplastic layer, make its dry tack free or partly sclerosis want can be fully after tack not, on the thermoplastic shaping film substrate, to make the thermoplastic shaping film of B stage protective layer, to go subsequent job.
7. as the thermoplastic shaping thinfilm protective coating manufacture method as described in the claim 6, it is characterized in that: this thermoplastic layer, hardened layer can use individual layer repeatedly coating method or multilayer coating method or comprehensive above-mentioned coating method are finished simultaneously simultaneously.
8. as the thermoplastic shaping thinfilm protective coating manufacture method as described in the claim 6, it is characterized in that: when making the moulding object and have sealer, comprising step has:
The thermoplastic shaping film that will have a B stage protective layer prints at the back side of protective layer or the processing of pattern; In addition, also can extrude the pattern of hope on B stage protective layer surface via thermal pressure; After mould and thermoplastic shaping film all arrive the preheating forming temperature, add to depress via pull of vacuum or mold and make the thermoplastic shaping film forming; Utilization light is radiated on the B stage protective layer, and the protective layer coating layer is hardened fully; Be placed in again in the die cavity of Jet forming machine; the one side that has protective layer contacts with mould; resin that the injection preheating is finished and preform inner face are combined into one and form the shape that has hardness and can not be out of shape, and this moulding object surface can be corroded and the tool resistance to scraping by chemical resistance.
9. as the thermoplastic shaping thinfilm protective coating manufacture method as described in the claim 6; it is characterized in that: after mould and thermoplastic shaping film all arrive the preheating forming temperature, add the pattern of depressing touching on the protective layer terminal mould via mold and be pressed onto on the protective layer.
10. as the thermoplastic shaping thinfilm protective coating manufacture method as described in the claim 6, it is characterized in that: when making the moulding object and have sealer, comprising step has:
Under the thermoplastic shaping temperature operation, the thermoplastic shaping film of putting surperficial tool B stage protective layer again via vacuum or pressure operation mode, is combined into one this thermoplastic shaping film and moulding object on molded object; On the moulding object that is combined into one, use illumination to penetrate the protective layer of thermoplastic shaping film is hardened fully, this moulding object surface can be corroded and the tool resistance to scraping by chemical resistance.
11. the thermoplastic shaping thinfilm protective coating manufacture method as described in the claim 10 is characterized in that: at the thermoplastic shaping film during,, touch protective layer and form desirable pattern according to having embossing pattern surface on the die surface in the thermoplastic shaping process.
12. a sealer is characterized in that: have the scratch resistant sclerosis protective layer of transferability energy, coat on the mould release membrance, it is made up of two layers of coating at least:
Hardened layer: be adjacent on the mould release membrance, possess the characteristic that do not chap when the hot pressing drawing and forming by one layer or more, can form through the coating that illumination shoot away into sclerosis then, gross thickness is 3～30 μ m;
Thermoplastic layer: be made up of one layer or more tool plasticity and coating that can not chap when stretching when the thermoforming, gross thickness is 3～30 μ m.
13. the sealer that can transfer as described in the claim 12 is characterized in that: a kind of easy adhesion property that can increase protective layer of the transparency, make pattern or printing-ink be easy to adhere to and dope layer that moulding object resin is easy to adhere to can be added on the thermoplastic layer.
14. the manufacture method with scratch resistant sclerosis protective layer of transferability energy, it is characterized in that: its step is as follows:
Coating generates one or most hardened layer coating on mould release membrance, make its dry tack free or partly sclerosis want can be fully after tack not; Overlapping coating and dry formation one or most thermoplastic layer coating on hardened layer are to make the transferability energy heat transfer write film that possesses B stage protective layer on mould release membrance, to go subsequent job.
15. the manufacture method as the scratch resistant sclerosis protective layer with transferability energy as described in the claim 14 is characterized in that: utilize transferability can the heat transfer write film to have and can chemical resistance corrode and the step of tool resistance to scraping is to make article surface:
Put the transferability of making B stage protective layer on this mould release membrance can heat transfer write film in the die cavity of Jet forming machine, the scratch resistant sclerosis protective layer of B stage places the inboard; Injecting resin makes resin and this B stage protective layer be combined into one and moulding; Treat that the scratch resistant sclerosis protective layer of this B stage is passed on the moulding object, remove mould release membrance, use illumination to penetrate B stage protective layer on the moulding object with the protective layer that hardens fully.
16. the manufacture method as the scratch resistant sclerosis protective layer with transferability energy as described in the claim 14 is characterized in that: utilize transferability can the heat transfer write film to have and can chemical resistance corrode and the step of tool resistance to scraping is to make article surface:
Face and the contact moudling object with the B stage protective layer on the transferability energy heat transfer write film; under the hot-forming temperature operation; again via vacuum or pressure operation mode; transfer B stage protective layer is to the moulding object and be combined as a whole; remove mould release membrance again, use illumination to penetrate on the moulding object then with the protective layer that hardens fully.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200710064705XA CN101269561B (en) | 2007-03-23 | 2007-03-23 | Surface protecting layer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200710064705XA CN101269561B (en) | 2007-03-23 | 2007-03-23 | Surface protecting layer |
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| Publication Number | Publication Date |
|---|---|
| CN101269561A true CN101269561A (en) | 2008-09-24 |
| CN101269561B CN101269561B (en) | 2010-09-08 |
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| CN200710064705XA Expired - Fee Related CN101269561B (en) | 2007-03-23 | 2007-03-23 | Surface protecting layer |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102303435A (en) * | 2011-05-20 | 2012-01-04 | 东莞劲胜精密组件股份有限公司 | Product protecting layer and processing technology thereof |
| CN108676185A (en) * | 2018-05-04 | 2018-10-19 | 苏州奥美材料科技有限公司 | A kind of Surface hardened layer polycarbonate film and preparation process |
| CN109747235A (en) * | 2017-11-07 | 2019-05-14 | 财团法人工业技术研究院 | Protect structure and electronic device |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3898256B2 (en) * | 1996-08-28 | 2007-03-28 | 大日本印刷株式会社 | Decorative sheet |
| CA2268288C (en) * | 1997-08-12 | 2009-06-09 | Nissha Printing Co., Ltd. | Transfer material, surface-protective sheet, and process for producing molded article |
| US6409354B1 (en) * | 2000-08-23 | 2002-06-25 | Vtec Technologies, Inc. | Transparent plastic or polymer based mirror apparatus and method for making the same |
-
2007
- 2007-03-23 CN CN200710064705XA patent/CN101269561B/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102303435A (en) * | 2011-05-20 | 2012-01-04 | 东莞劲胜精密组件股份有限公司 | Product protecting layer and processing technology thereof |
| CN109747235A (en) * | 2017-11-07 | 2019-05-14 | 财团法人工业技术研究院 | Protect structure and electronic device |
| CN108676185A (en) * | 2018-05-04 | 2018-10-19 | 苏州奥美材料科技有限公司 | A kind of Surface hardened layer polycarbonate film and preparation process |
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| CN101269561B (en) | 2010-09-08 |
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Granted publication date: 20100908 Termination date: 20120323 |