CN105082686A - Mobile phone protection film with overheat/overcold protection and warning functions - Google Patents
Mobile phone protection film with overheat/overcold protection and warning functions Download PDFInfo
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- CN105082686A CN105082686A CN201410217832.9A CN201410217832A CN105082686A CN 105082686 A CN105082686 A CN 105082686A CN 201410217832 A CN201410217832 A CN 201410217832A CN 105082686 A CN105082686 A CN 105082686A
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Abstract
The invention relates to a mobile phone protection film with overheat/overcold protection and warning functions. The mobile phone protection film comprises a first release layer, a first adhesive layer, a transparent substrate layer, an overheat/overcold protection layer and a temperature-sensitive dope layer which are arranged in sequence, wherein two adjacent layers directly contact with each other. According to the invention, when the temperature of a mobile phone is too high or too low, the overheat/overcold protection layer may undergo solid-solid phase change so as to absorb or release heat accordingly, so the temperature of the mobile phone is prevented from too high or too low; and the temperature-sensitive dope layer can present different colors in a certain temperature range so as to warn a user of the mobile phone, and thus, a better protection effect is exerted on the mobile phone.
Description
Technical field
The present invention relates to a kind of safeguard film for cellular phone, particularly relate to a kind of safeguard film for cellular phone that overheated/cold protection and effect of warning excessively can be provided.
Background technology
For increasing smart mobile phone, touch screen has become very common a kind of mode of operation.To this series products, sense of touch and the protection of touch screen are all the parts that user is concerned about very much.With regard to mobile phone itself, screen sense of touch can well realize single-point touch, and sensitivity is higher, but in screen protection, also not yet reaches perfect boundary, in routine use, still can suffer damage.And for this situation, most of user can buy safeguard film for cellular phone and protect further mobile phone.
Safeguard film for cellular phone divides by function on the market, mainly contains high transmittance film, frosted film, peep-proof film, mirror film, preventing from scraping film etc.Current safeguard film for cellular phone on the market, primarily of transparent substrate layer, mucigel and release layer three layers composition, can not scratched by available protecting mobile phone screen, but safeguard film for cellular phone on the market is still in protection mobile phone screen not by the stage scratched.
Present mobile phone is gradually to diversification future development, its function from strength to strength, as the raising of mobile phone camera pixel, the quickening of processor processing speed, with the compatibility enhancing etc. of 4G network and more software, the development of mobile phone presents the trend of multifunctional all.While handset capability is powerful, it is the heat production problem of mobile phone.The speed of service is faster, and the heat that machine produces is also more.Too high temperature not only damages mobile phone hardware, battery performance also can be caused to decline rapidly, even can cause battery explosion time serious, causes serious threat to user and other people personal safety.
Patent CN103152456A discloses a kind of cell-phone cover that uses to the method for mobile phone temperature control, and the method can take away the heat produced in mobile phone running in time, effectively, plays the effect of protection mobile phone.But it mainly relies on axial flow blower to dispel heat, also needs the equipment such as battery, temperature sensor, complicated process of preparation.Patent CN202908053U discloses a kind of method that cooling bag using phase transformation cooling material or metal material to make is lowered the temperature to electronic product, it mainly adopts heat of solution or the metal cooling of inorganic matter, Problems existing mainly contains: the heat 1) absorbed in inorganic matter course of dissolution is less, and heat dispersion is restricted; 2) adopt metal material cooling, can increase the weight of mobile phone weight, the development trend light, thin with mobile phone is runed counter to.
The impact of high temperature on mobile phone is apparent, also the attention of people can be caused, but low temperature causes damage also to can not be ignored to mobile phone, as in northern certain areas, winter makes outdoor temperature can be reduced to-20 to-30 DEG C, and when temperature is too low, the mobile phone speed of service can be slack-off, power consumption increases, and battery performance also can be deteriorated.But have not been reported to the method for mobile phone heat supply.
Summary of the invention
For the deficiencies in the prior art, the invention provides a kind of safeguard film for cellular phone with overheated/cold protection and effect of warning excessively.
Described safeguard film for cellular phone comprises the first release layer, the first mucigel, transparent substrate layer, overheated/cold protective layer and temperature sensing paint layer excessively; Described first release layer, the first mucigel, transparent substrate layer, overheated/cold protective layer of mistake and temperature sensing paint layer are arranged in order according to the sequence, and directly contact between adjacent two layers.
Preferably, described overheated/cross cold protective layer can there is solid-solid phase-change at a certain temperature, can absorb in described solid-solid phase-change process heat or release heat.
Preferably, described overheated/cross cold protective layer be a kind of energy storage material, be preferably a kind of organic energy storage material, be more preferably the one in modified polyurethane, high density polyethylene (HDPE) or its composition, be more preferably modified polyurethane.
Preferably, described modified polyurethane is polyether-type or PAUR segmented copolymer, is preferably EU segmented copolymer.
Preferably, the preparation of described modified polyurethane comprises following steps:
Step 1, isocyanate-monomer dissolves with modifier and mixes, and is obtained by reacting prepolymer;
Step 2, described prepolymer, under chain extender exists, carries out chain extending reaction, obtains EU segmented copolymer.
Preferably, described isocyanate-monomer is the mixture of one or more in methyl diphenylene diisocyanate (MDI), toluene di-isocyanate(TDI), IPDI and hexamethylene diisocyanate, and is preferably methyl diphenylene diisocyanate.
Preferably, described dissolving, course of reaction are all at N
2, carry out under one or more the mixture atmosphere such as He, Ar, be preferably N
2atmosphere.
Preferably, the mass concentration of described isocyanate-monomer solution is 1 to 10%, is preferably 1 to 8%, is more preferably 1 to 5%, is more preferably 2 to 3%.
Preferably, described chain extender is butanediol (BDO), 3,3 '-two chloro-4, the mixture of one or more of 4 ' diaminodiphenyl-methane, glycerine, Diethylaminoethanol etc., is preferably butanediol.
Preferably, the mass concentration of described chain extender is 0.2 to 5%, is preferably 0.5 to 3%, is more preferably 1 to 2%.
Preferably, the time of described chain extending reaction is 1 to 5h, is preferably 2 to 4h, is more preferably 2 to 3h.
Preferably, described modifier is the mixture of one or more in polyethylene glycol, polypropylene glycol, polyglycerol, is preferably polyethylene glycol.
Preferably, described modifier is placed in pretreatment 1 to 5h under 80 to 150 DEG C of vacuum conditions before the use, is preferably pretreatment 2 to 3h under 100 to 120 DEG C of vacuum conditions.
Preferably, methyl diphenylene diisocyanate described in step 1 and/or chain extender are dissolved in one or more in dimethyl formamide (DMF), repefral, methyl ethyl ketone, are preferably dimethyl formamide.
Preferably, the mass ratio of described modifier and methyl diphenylene diisocyanate is 1:1-30:1, is preferably 1:1-20:1, is more preferably 5:1-15:1, is more preferably 10:1-12:1.
Preferably, the solution temperature of described methyl diphenylene diisocyanate is-20 to 20 DEG C, is preferably-10 to 10 DEG C, is more preferably-5 to 5 DEG C.
Preferably, the reaction temperature of described generation prepolymer is 30 to 150 DEG C, is preferably 40 to 120 DEG C, is more preferably 50 to 100 DEG C, is more preferably 60 to 80 DEG C.
Preferably, described step 2 is complete reaction, is defined as arriving reaction end when being preferably the characteristic peak disappearance of modifier on infrared spectrum.
Preferably, add the mode of expanding chain pharmaceutical solution in described step 3 for slowly to add, the mode preferably dropwise dripped.
Preferably, the chain extending reaction temperature of described step 3 is 50 to 120 DEG C, reaction 1 to 4h; Be preferably at 70 to 100 DEG C of reaction 2 to 3h; Be more preferably 80 to 90 DEG C of reaction 3h.Preferably, described modifying process also comprises vacuum drying, described vacuum drying temperature is 40 to 150 DEG C, drying time is 20 to 100h, be preferably vacuum drying temperature and be 60 to 120 DEG C, drying time is 30 to 80h, and be more preferably vacuum drying temperature and be 80 to 100 DEG C, drying time is 40 to 60h.
Preferably, the molecular weight of described modified polyurethane is 100,000 to 200,000, is preferably 120,000 to 160,000.
Preferably, the melting enthalpy of described modified polyurethane is 50 to 300J/g, is preferably 100 to 200J/g.
Preferably, the crystallization enthalpy of described modified polyurethane is 50 to 300J/g, is preferably 100 to 200J/g.
Preferably, described solid-solid phase-change process heat absorption, preferably, described phase transition temperature is 35 to 60 DEG C, is preferably 40 to 55 DEG C, is more preferably 45 to 50 DEG C.
Preferably, the heat release of described solid-solid phase-change process, preferably, described phase transition temperature is-30 to 35 DEG C, is preferably-20 to 30 DEG C, is more preferably-10 to 25 DEG C, is more preferably 0 to 15 DEG C.
Further, described temperature sensing paint layer matrix material is generally polyester material.
Further, described temperature sensing paint layer contains heat discoloration powder, and described heat discoloration powder discoloring temperature scope is 30 to 60 DEG C, is preferably 40 to 60 DEG C, is more preferably 50 to 60 DEG C.
Further, described heat discoloration powder discoloring temperature scope is-20 to 25 DEG C, is preferably-10 to 15 DEG C, is more preferably 0 to 10 DEG C.
Preferably, described temperature sensing paint layer is under 30 to 60 DEG C with-20 to 25 DEG C of conditions, and heat discoloration powder color difference, is preferably the one in redness, yellow, green, blueness, purple.
Preferably, described safeguard film for cellular phone also comprises the second mucigel and the second release layer, and described second mucigel is bonding with temperature sensing paint layer and the second release layer.
Preferably, the thickness of the first release layer and the second release layer is 10-80 μm, is preferably 20-60 μm, is more preferably 25-50 μm, is more preferably 30-40 μm.
Preferably, the thickness of temperature sensing paint layer is 2-30 μm, is preferably 5-23 μm, is more preferably 10-15 μm, is more preferably 12-13 μm.
Preferably, the thickness of overheated/cold protective layer of mistake is 10-50 μm, is preferably 15-40 μm, is more preferably 20-30 μm, is more preferably 22-25 μm.
Preferably, the thickness of transparent substrate layer is 20-200 μm, is preferably 30-150 μm, is more preferably 35-120 μm, is more preferably 40-80 μm.
Beneficial effect of the present invention is, when mobile phone temp is higher, can remove partial heat in time, prevents mobile phone temp too high and the mobile phone that causes runs slowly, the even battery of mobile phone generation of situation of blasting of battery of mobile phone hydraulic performance decline.When mobile phone temp is lower, mobile phone additional heat can be given in time, the problem such as the operation preventing low temperature from bringing to mobile phone is slow.When mobile phone temp is lower or higher, safeguard film for cellular phone can demonstrate different color changes, plays the effect of warning.
Accompanying drawing explanation
Fig. 1 is structure of safeguard film for cellular phone schematic diagram of the present invention;
Fig. 2 is a kind of Application Example of safeguard film for cellular phone of the present invention;
Fig. 3 is a kind of preparation technology of modified polyurethane of the present invention;
1, the first release layer; 2, the first mucigel; 3, temperature sensing paint layer; 4, overtemperature protection layer; 5, transparent substrate layer; 6, the second mucigel; 7, the second release layer; 8, safeguard film for cellular phone; 9, mobile phone screen.
Detailed description of the invention
Below in conjunction with the description that specific embodiment is described further technical solution of the present invention.
embodiment 1
Safeguard film for cellular phone as shown in Figure 1, directly connects between adjacent two layers, and size, the shape of safeguard film for cellular phone are determined according to mobile phone model and screen size.First release layer thickness is 30 μm, and overtemperature protection layer thickness is 20 μm, and temperature sensing paint layer thickness is 2 μm, and transparent base layer thickness is 50 μm, and the second release layer thickness is 30 μm.
On mobile phone screen during pad pasting; first wiping screen is clean; remove surperficial greasy dirt or moisture etc.; open the first release layer, as shown in Figure 2, paste from one jiao of mobile phone; employing thin plates etc. are slowly by diaphragm compacting; discharge wherein bubble, finally opened from the second mucigel place by second release layer on upper strata, pad pasting completes.
By same brand, same model mobile phone is divided into 3 groups, respectively as experimental group, control group and blank group, experimental group mobile phone screen pastes the described safeguard film for cellular phone of invention, control group mobile phone screen pastes commercially available regular handset diaphragm, blank group mobile phone screen does not paste safeguard film for cellular phone, real-time detection of handset movement temperature, after running 6h, experimental group mobile phone mean temperature is 43 DEG C, control group mobile phone mean temperature is 50 DEG C, blank group mobile phone mean temperature is 49 DEG C, test shows that safeguard film for cellular phone of the present invention can effectively absorb the heat produced in mobile phone running.
embodiment 2
Safeguard film for cellular phone shape is identical with embodiment 1.First release layer thickness is 10 μm, and temperature sensing paint layer thickness is 10 μm, and overtemperature protection layer thickness is 50 μm, and transparent base layer thickness is 20 μm, and the second release layer thickness is 60 μm.
Sticking film for mobile phone method is with embodiment 1.
Experimental technique is with embodiment 1; after running 6h, experimental group mobile phone mean temperature is 44 DEG C, and control group mobile phone mean temperature is 51 DEG C; blank group mobile phone mean temperature is 50 DEG C, and test shows that safeguard film for cellular phone of the present invention can effectively absorb the heat produced in mobile phone running.
embodiment 3
Safeguard film for cellular phone shape is with embodiment 1.First release layer thickness is 80 μm, and temperature sensing paint layer thickness is 30 μm, and overtemperature protection layer thickness is 10 μm, and transparent base layer thickness is 200 μm, and the second release layer thickness is 20 μm.
Sticking film for mobile phone method is with embodiment 1.
Arranging refrigerator temperature is 0 DEG C; after stablizing 1h; mobile phone is placed in described refrigerator; real-time detection of handset movement temperature; take out after 3h, experimental group mobile phone mean temperature is 20 DEG C, and control group mobile phone mean temperature is 10 DEG C; blank group mobile phone mean temperature is 10 DEG C, and test shows that safeguard film for cellular phone of the present invention can effectively absorb the heat produced in mobile phone running.Illustrate that safeguard film for cellular phone of the present invention is when mobile phone temp is lower, can release heat, to mobile phone heat supply, play the effect of protection mobile phone.
screen sense of touch is tested
Same brand, same model mobile phone are divided into 2 groups; be respectively experimental group and control group; experimental group mobile phone screen pastes the described safeguard film for cellular phone of invention; control group mobile phone screen does not paste safeguard film for cellular phone; adopt the Touchscope equipment of Agawi company exploitation and the reaction time of corresponding software testing mobile phone; result shows; the average reaction time of experimental group is 112 milliseconds; the average reaction time of control group is 109 milliseconds; illustrate and use safeguard film for cellular phone of the present invention to affect less on the sense of touch of mobile phone, do not affect the normal use of mobile phone.
prepared by modified polyurethane
As shown in Figure 3, N
2protection, at 0 DEG C, be dissolved in respectively in DMF by MDI and BDO, be mixed with the DMF solution that MDI mass content is 2.6%, BDO mass content is the DMF solution of 1.88%, by PEG-6000 100 DEG C, vacuum pre-treatment 3h is for subsequent use.Be that 12:1 adds PEG-6000, stirring and dissolving 10min in the solution of MDI by the mass ratio of PEG and MDI, 80 DEG C of stirring reactions, are observed by infrared spectrum, react completely, obtain prepolymer with the hydroxyl group absorption peak disappearance judgement on PEG.Be the BDO solution that 9:25 dropwise adds preparation in prepolymer by BDO and MDI mass ratio, 80 DEG C of stirring reaction 3h.Then reaction mixture is poured in mould and keep 48h in 80 DEG C of vacuum drying chambers, obtain the polyurethane of PEG modification.
Be described in detail specific embodiments of the invention above, but it is just as example, the present invention is not restricted to specific embodiment described above.To those skilled in the art, any equivalent modifications that the present invention is carried out and substituting also all among category of the present invention.Therefore, equalization conversion done without departing from the spirit and scope of the invention and amendment, all should contain within the scope of the invention.
Claims (10)
1. be with a safeguard film for cellular phone for overheated/cold protection and effect of warning excessively, it is characterized in that, described safeguard film for cellular phone comprises the first release layer, the first mucigel, transparent substrate layer, overheated/cold protective layer and temperature sensing paint layer excessively; Described first release layer, the first mucigel, transparent substrate layer, overheated/cold protective layer of mistake and each layer of temperature sensing paint layer are arranged in order according to the sequence, directly contact between adjacent two layers.
2. band according to claim 1 overheated/cross cold protection and warn effect safeguard film for cellular phone, it is characterized in that, described overheated/cross cold protective layer comprise a kind of energy storage material.
3. band according to claim 1 overheated/cross cold protection and warn effect safeguard film for cellular phone, it is characterized in that, described overheated/cross cold protective layer comprise a kind of solid-solid phase transition material.
4. band according to claim 3 overheated/cross cold protection and warn effect safeguard film for cellular phone, it is characterized in that, described solid-solid phase transition material is modified polyurethane.
5. band according to claim 4 overheated/cross cold protection and warn effect safeguard film for cellular phone, it is characterized in that, the preparation of described modified polyurethane comprises the steps:
Step 1, isocyanate-monomer dissolves with modifier and mixes, and is obtained by reacting prepolymer;
Step 2, described prepolymer, under chain extender exists, carries out chain extending reaction, obtains described modified polyurethane.
6. the preparation method of modified polyurethane according to claim 5, it is characterized in that, described modifier is the mixture of one or more in polyethylene glycol, polypropylene glycol, polyglycerol, before use, described modifier is placed in pretreatment under 80 to 150 DEG C of vacuum conditions.
7. band according to claim 3 overheated/cross cold protection and warn effect safeguard film for cellular phone, it is characterized in that, the phase transition temperature of solid-solid phase-change endothermic process is 35 to 60 DEG C, and the phase transition temperature of solid-solid phase-change exothermic process is-30 to 35 DEG C.
8. band according to claim 1 overheated/cross cold protection and warn effect safeguard film for cellular phone; it is characterized in that; described temperature sensing paint layer contains heat discoloration powder; described heat discoloration powder discoloring temperature scope is 30 to 60 DEG C and-20 to 25 DEG C, and described heat discoloration powder shows different colours in 30 to 60 DEG C and-20 to 25 DEG C of temperature ranges.
9. band according to claim 1 overheated/cross cold protection and warn effect safeguard film for cellular phone, it is characterized in that, described safeguard film for cellular phone also comprises the second mucigel and the second release layer, described second mucigel by temperature sensing paint layer and the second release layer bonding.
10. band according to claim 1 overheated/cross cold protection and warn effect safeguard film for cellular phone, it is characterized in that, described first release layer thickness is 10-80 μm; Described temperature sensing paint layer thickness is 2-30 μm; Described overheated/cross cold protective layer thickness be 10-50 μm; Described transparent base layer thickness is 20-200 μm; Described second release layer thickness is 10-80 μm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410217832.9A CN105082686B (en) | 2014-05-20 | 2014-05-20 | A kind of safeguard film for cellular phone with overheat/supercooling protection and effect of warning |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410217832.9A CN105082686B (en) | 2014-05-20 | 2014-05-20 | A kind of safeguard film for cellular phone with overheat/supercooling protection and effect of warning |
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| CN105082686A true CN105082686A (en) | 2015-11-25 |
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| CN202805818U (en) * | 2012-06-25 | 2013-03-20 | 东莞市富印胶粘科技有限公司 | Special high-transparency and high temperature-resistant protective film for mobile phones and computers |
| CN203590667U (en) * | 2013-11-26 | 2014-05-07 | 昆山汉品电子有限公司 | Insulation heat dissipation film |
| CN204249479U (en) * | 2014-05-20 | 2015-04-08 | 上海睿途新材料科技有限公司 | A kind of safeguard film for cellular phone with overheated/cold protection and effect of warning excessively |
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2014
- 2014-05-20 CN CN201410217832.9A patent/CN105082686B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050249946A1 (en) * | 2004-05-07 | 2005-11-10 | Optimax Technology Corporation | Protection film and method of making the same |
| CN101781394A (en) * | 2009-01-21 | 2010-07-21 | 南通芯迎设计服务有限公司 | Synthesis of polyurethane macromolecular solid-solid phase change energy storage material |
| CN202727488U (en) * | 2012-05-21 | 2013-02-13 | 科荣包装设备有限公司 | Thermochromic screen protector |
| CN202805818U (en) * | 2012-06-25 | 2013-03-20 | 东莞市富印胶粘科技有限公司 | Special high-transparency and high temperature-resistant protective film for mobile phones and computers |
| CN203590667U (en) * | 2013-11-26 | 2014-05-07 | 昆山汉品电子有限公司 | Insulation heat dissipation film |
| CN204249479U (en) * | 2014-05-20 | 2015-04-08 | 上海睿途新材料科技有限公司 | A kind of safeguard film for cellular phone with overheated/cold protection and effect of warning excessively |
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