CN109796889A - Rupture pressure disc and preparation method thereof in a kind of 3D curved surface cell phone rear cover - Google Patents
Rupture pressure disc and preparation method thereof in a kind of 3D curved surface cell phone rear cover Download PDFInfo
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- CN109796889A CN109796889A CN201811655303.1A CN201811655303A CN109796889A CN 109796889 A CN109796889 A CN 109796889A CN 201811655303 A CN201811655303 A CN 201811655303A CN 109796889 A CN109796889 A CN 109796889A
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- pressure disc
- rupture pressure
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Abstract
The invention belongs to technical field of membrane, and in particular to rupture pressure disc and preparation method thereof in a kind of 3D curved surface cell phone rear cover, rupture pressure disc successively includes polyimide film, adhesive layer and release film in the 3D curved surface cell phone rear cover.The application is using the polyimide film with excellent heat resistance and draftability as explosion-proof film base material, it can satisfy requirement of the curved-surface structure turning position to material stretching and shrinkage, solving PET rupture pressure disc can not be bonded completely with 3D curved surface, and PET rupture pressure disc is easy the problem of warping after thermal flexure processing, reduces fraction defective；By polyimide film thickness control at 25-100 μm, adhesive layer thickness is controlled at 10-50 μm the application, and the thickness of rupture pressure disc is reduced while guaranteeing bond effect, is conducive to the thermal flexure processing of rupture pressure disc；The application adds silane coupling agent in the coating fluid of adhesive layer, is conducive to improve the adhesive force between adhesive layer and polyimide film and glass, and peeling force still with higher at high temperature.
Description
Technical field
The invention belongs to technical field of membrane, and in particular to rupture pressure disc and preparation method thereof in a kind of 3D curved surface cell phone rear cover.
Background technique
With the development of science and technology, electronic product such as mobile phone, tablet computer etc. has goed deep into huge numbers of families, become daily output life
In indispensable a part.With the exploitation of double-sided glass technology, double-sided glass is increasingly becoming the standard configuration of mainstream model, but glass
Glass have the shortcomings that wear no resistance with it is frangible, in order to be enhanced to glass, avoiding glass breaking from dispersing causes to hurt sb.'s feelings, and can exist
Electronic product dorsal shield glass uses rupture pressure disc.Currently, bent screen electronic product is increasingly disappeared because of its perfect streamlined appearance
The welcome of the person of expense, electronics manufacturer are investigated 3D curved surface rear cover, further promote electronics while developing 3D song screen
The appearance of product.
Current electronic product rear cover rupture pressure disc is mainly using PET film as substrate, and backsize adhesive, front is printed
Brush and plating processing after with glass gluing.PET film is other than having excellent physical mechanical property, also with fabulous optical
Can, if transparency is good, mist degree is low, glossiness is high.But PET rupture pressure disc is only used for plane and the processing of bi-curved arc side,
However it is very high to the stretching of material and shrinkage requirement at the turning position of 3D curved-surface structure, existing technology is difficult to realize
PET material is bonded with the complete of 3D curved surface, and PET rupture pressure disc is easy to warp after thermal flexure processing, and fraction defective is 30% or more.
Summary of the invention
In order to solve the problems, such as that existing rupture pressure disc is difficult to be bonded completely with the 3D curved surface of electronic product rear cover, the present invention is disclosed
Rupture pressure disc and preparation method thereof in a kind of 3D curved surface cell phone rear cover, which cooperates using polyimide film as substrate
Adhesive layer and release film, solve PET rupture pressure disc can not be bonded completely with 3D curved surface and PET rupture pressure disc thermal flexure process
After be easy the problem of warping.
To achieve the goals above, the present invention adopts the following technical scheme:
Rupture pressure disc in a kind of 3D curved surface cell phone rear cover, rupture pressure disc successively includes polyimides in the 3D curved surface cell phone rear cover
Film, adhesive layer and release film.
Specifically, above-mentioned polyimide film is transparent polyimide film, and with a thickness of 25-100 μm, sided corona treatment is passed through on surface
Or soda acid processing, light transmittance > 90%, mist degree < 1%.
Specifically, above-mentioned adhesive layer thickness is 10-50 μm, preferably 25 μm.
The preparation method of rupture pressure disc, includes the following steps: in 3D curved surface cell phone rear cover
Step 1: matrix resin, elastic resin and solvent are sequentially added in liquid dispensing tank, 20-40min is stirred, it is then quiet
0.5-2h is set, the coating fluid of solid content 20-60% is prepared；
Step 2: the coating fluid even spread prepared to polyimide film surface in 60-140 DEG C of sufficiently drying, is obtained
Adhesive layer；
Step 3: release film is fitted to tie layer surface, guarantee fitting bubble-free；
Step 4: product made from step 3 is cured 2-4 days in 40 DEG C, rupture pressure disc in 3D curved surface cell phone rear cover is obtained；
Matrix resin is one of polyurethane resin, polyester resin and acrylic resin in the step 1；
Elastic resin is organosilicon modified crylic acid resin or silicone modified polyester resin in the step 1.
Specifically, the mass ratio of matrix resin and elastic resin is 7-19:1 in above-mentioned steps one.
Specifically, above-mentioned solvent is one or more of toluene, dimethylbenzene, butanone, isopropanol.
Specifically, above-mentioned polyimide film first passes through sided corona treatment or soda acid processing in advance.
Specifically, silane coupling agent KH570 is also added into above-mentioned steps one.
Specifically, the additional amount of above-mentioned silane coupling agent KH570 is the 1-5% of coating fluid gross mass.
Specifically, above-mentioned steps two are, by the coating fluid even spread prepared to polyimide film surface, to stand 5-
20min obtains adhesive layer in 60-140 DEG C of sufficiently drying.
The present invention has following the utility model has the advantages that (1) the application is using polyimide film as explosion-proof film base material, polyimides
Film, which has excellent heat resistance and draftability as the substrate of rupture pressure disc in 3D curved surface cell phone rear cover, can satisfy curved surface knot
Structure turning position is stretched to material and the requirement of shrinkage, and solving PET rupture pressure disc can not be bonded completely with 3D curved surface, and
PET rupture pressure disc is easy the problem of warping after thermal flexure processing, reduces fraction defective；
(2) by polyimide film thickness control at 25-100 μm, adhesive layer thickness is controlled at 10-50 μm the application, is being protected
The thickness that rupture pressure disc is reduced while demonstrate,proving bond effect is conducive to the thermal flexure processing of rupture pressure disc；
(3) polyimide film is carried out sided corona treatment or soda acid processing by the application in advance, helps to improve adhesive layer poly-
Adhesive force on acid imide film；
(4) the application adds silane coupling agent in the coating fluid of adhesive layer, is conducive to improve adhesive layer and polyimides
Adhesive force between film and glass, and peeling force still with higher at high temperature, so that prepared rupture pressure disc be made to pass through
After overheating bending machining, still fraction defective can be reduced well with 3D application of a surface.
Detailed description of the invention
Present invention will be further explained below with reference to the attached drawings and examples.
Fig. 1 is structural schematic diagram of the invention.
In figure: 1. polyimide films；2. adhesive layer；3. release film.
Specific embodiment
Presently in connection with embodiment, the present invention is described in further detail.
In 3D curved surface cell phone rear cover rupture pressure disc the preparation method is as follows:
Step 1: matrix resin, elastic resin and solvent are sequentially added in liquid dispensing tank, 20-40min is stirred, it is then quiet
0.5-2h is set, the coating fluid of solid content 20-60% is prepared；
Step 2: the coating fluid even spread prepared to polyimide film surface in 60-140 DEG C of sufficiently drying, is obtained
Adhesive layer；
Step 3: release film is fitted to tie layer surface, guarantee fitting bubble-free；
Step 4: product made from step 3 is cured 2-4 days in 40 DEG C, rupture pressure disc in 3D curved surface cell phone rear cover is obtained；
The parameters of embodiment 1-5 are shown in Table 1.
Table 1
Embodiment 5 is first stood after step 2 is by the coating fluid even spread to polyimide film surface prepared
10min, then carry out heating and subsequent processing.
Comparative example 1 is substantially the same manner as Example 5, the difference is that, by the coating fluid even spread prepared to polyamides Asia
It after amine film surface, does not stand, directly carries out heating and subsequent processing.
Comparative example 2 is commercialization rupture pressure disc (PET base material).
Embodiment 1-5 and rupture pressure disc prepared by comparative example 1-2 are tested for the property, test result is shown in Table 2.
Table 2
Taking the above-mentioned ideal embodiment according to the present invention as inspiration, through the above description, relevant staff is complete
Various changes and amendments can be carried out without departing from the scope of the technological thought of the present invention' entirely.The technology of this invention
Property range is not limited to the contents of the specification, it is necessary to which the technical scope thereof is determined according to the scope of the claim.
Claims (10)
1. rupture pressure disc in a kind of 3D curved surface cell phone rear cover, it is characterised in that: rupture pressure disc successively wraps in the 3D curved surface cell phone rear cover
Include polyimide film (1), adhesive layer (2) and release film (3).
2. rupture pressure disc in 3D curved surface cell phone rear cover as described in claim 1, it is characterised in that: the polyimide film (1) is
Transparent polyimide film, with a thickness of 25-100 μm, surface is handled by sided corona treatment or soda acid, light transmittance > 90%, mist degree
< 1%.
3. rupture pressure disc in 3D curved surface cell phone rear cover as described in claim 1, it is characterised in that: the adhesive layer (2) with a thickness of
10-50 μm, preferably 25 μm.
4. as described in claim any one of 1-3 in 3D curved surface cell phone rear cover rupture pressure disc preparation method, it is characterised in that: including
Following steps:
Step 1: matrix resin, elastic resin and solvent are sequentially added in liquid dispensing tank, 20-40min is stirred, is then allowed to stand
0.5-2h prepares the coating fluid of solid content 20-60%；
Step 2: the coating fluid even spread prepared to polyimide film (1) surface in 60-140 DEG C of sufficiently drying, is obtained
Adhesive layer (2)；
Step 3: release film (3) is fitted to adhesive layer (2) surface, guarantee fitting bubble-free；
Step 4: product made from step 3 is cured 2-4 days in 40 DEG C, rupture pressure disc in 3D curved surface cell phone rear cover is obtained；
Matrix resin is one of polyurethane resin, polyester resin and acrylic resin in the step 1；
Elastic resin is organosilicon modified crylic acid resin or silicone modified polyester resin in the step 1.
5. the preparation method of rupture pressure disc in 3D curved surface cell phone rear cover as claimed in claim 4, it is characterised in that: the step 1
The mass ratio of middle matrix resin and elastic resin is 7-19:1.
6. the preparation method of rupture pressure disc in 3D curved surface cell phone rear cover as claimed in claim 4, it is characterised in that: the solvent is
One or more of toluene, dimethylbenzene, butanone, isopropanol.
7. the preparation method of rupture pressure disc in 3D curved surface cell phone rear cover as claimed in claim 4, it is characterised in that: the polyamides is sub-
Amine film (1) first passes through sided corona treatment or soda acid processing in advance.
8. the preparation method of rupture pressure disc in 3D curved surface cell phone rear cover as claimed in claim 4, it is characterised in that: the step 1
In be also added into silane coupling agent KH570.
9. the preparation method of rupture pressure disc in 3D curved surface cell phone rear cover as claimed in claim 8, it is characterised in that: the silane is even
The additional amount for joining agent KH570 is the 1-5% of coating fluid gross mass.
10. the preparation method of rupture pressure disc in 3D curved surface cell phone rear cover as claimed in claim 9, it is characterised in that: the step
Two are, by the coating fluid even spread prepared to polyimide film (1) surface, stand 5-20min, sufficiently dry in 60-140 DEG C
It is dry, it obtains adhesive layer (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811655303.1A CN109796889A (en) | 2018-12-29 | 2018-12-29 | Rupture pressure disc and preparation method thereof in a kind of 3D curved surface cell phone rear cover |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811655303.1A CN109796889A (en) | 2018-12-29 | 2018-12-29 | Rupture pressure disc and preparation method thereof in a kind of 3D curved surface cell phone rear cover |
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| CN109796889A true CN109796889A (en) | 2019-05-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201811655303.1A Pending CN109796889A (en) | 2018-12-29 | 2018-12-29 | Rupture pressure disc and preparation method thereof in a kind of 3D curved surface cell phone rear cover |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110205042A (en) * | 2019-06-19 | 2019-09-06 | 湖南工学院 | Mobile phone explosion-proof film production process |
| CN110540669A (en) * | 2019-08-30 | 2019-12-06 | 新恒东薄膜材料（常州）有限公司 | inner explosion-proof membrane for laser processing and application thereof |
| CN111394003A (en) * | 2020-04-29 | 2020-07-10 | 四川羽玺新材料股份有限公司 | Curved screen explosion-proof membrane and manufacturing method thereof |
| CN111961407A (en) * | 2020-08-27 | 2020-11-20 | 厦门三德信科技股份有限公司 | Colorless polyimide explosion-proof layer and preparation method thereof |
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| JP2008229866A (en) * | 2007-03-16 | 2008-10-02 | Toyobo Co Ltd | Adhesive film and semiconductor device |
| CN104356978A (en) * | 2014-12-03 | 2015-02-18 | 张亦彬 | Preparation method of adhesive |
| CN207347468U (en) * | 2017-03-28 | 2018-05-11 | 新纶科技（常州）有限公司 | A kind of PI rupture pressure discs |
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| JP2008229866A (en) * | 2007-03-16 | 2008-10-02 | Toyobo Co Ltd | Adhesive film and semiconductor device |
| CN104356978A (en) * | 2014-12-03 | 2015-02-18 | 张亦彬 | Preparation method of adhesive |
| CN207347468U (en) * | 2017-03-28 | 2018-05-11 | 新纶科技（常州）有限公司 | A kind of PI rupture pressure discs |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110205042A (en) * | 2019-06-19 | 2019-09-06 | 湖南工学院 | Mobile phone explosion-proof film production process |
| CN110205042B (en) * | 2019-06-19 | 2021-02-23 | 湖南工学院 | Production process of mobile phone explosion-proof membrane |
| CN110540669A (en) * | 2019-08-30 | 2019-12-06 | 新恒东薄膜材料（常州）有限公司 | inner explosion-proof membrane for laser processing and application thereof |
| CN110540669B (en) * | 2019-08-30 | 2022-06-21 | 新恒东薄膜材料（常州）有限公司 | Inner explosion-proof membrane for laser processing and application thereof |
| CN111394003A (en) * | 2020-04-29 | 2020-07-10 | 四川羽玺新材料股份有限公司 | Curved screen explosion-proof membrane and manufacturing method thereof |
| CN111961407A (en) * | 2020-08-27 | 2020-11-20 | 厦门三德信科技股份有限公司 | Colorless polyimide explosion-proof layer and preparation method thereof |
| CN111961407B (en) * | 2020-08-27 | 2022-08-16 | 厦门三德信科技股份有限公司 | Colorless polyimide explosion-proof layer and preparation method thereof |
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Application publication date: 20190524 |
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