CN208995427U - A kind of curved surface protective film - Google Patents
A kind of curved surface protective film Download PDFInfo
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- CN208995427U CN208995427U CN201820978926.1U CN201820978926U CN208995427U CN 208995427 U CN208995427 U CN 208995427U CN 201820978926 U CN201820978926 U CN 201820978926U CN 208995427 U CN208995427 U CN 208995427U
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- protective film
- parent metal
- urethane material
- flexible parent
- layer
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Abstract
The utility model provides a kind of protective film, including flexible parent metal；Functional layer is set to the side of the flexible parent metal；Urethane material is set to side of the flexible parent metal far from functional layer；Pressure-sensitive adhesive layer is set to side of the urethane material far from flexible parent metal；The urethane material with a thickness of 20-150 μm.It is big that PET hardness is largely improved by the protective film; the problem of being bonded bad warpage; it further efficiently solves the problems, such as that the solvent penetration generated when the direct coating function layer of urethane material residual and volatile organic content are high, improves binding yield.
Description
Technical field
The utility model relates to protective film field more particularly to a kind of curved surface protective films.
Background technique
With the appearance and rapid proliferation of smart phone, screen protecting film has become the standard configuration of mobile phone.Know both at home and abroad
Famous-object participants in a bridge game's machine dispatch from the factory when, all can random arrangement protective film, especially for special mobile phone model, by the protection of shape by die-cutting
On the one hand film can be bonded fuselage and play a good protective effect to screen with corresponding type perfect matching, another party
Face passes through the functional layer of protective film, moreover it is possible to protective film be made to have the function of smooth antibacterial, anti-dazzle, antireflection, filter blue light etc..
As comprehensive screen and curved surface screen mobile phone have largely put goods on the market, apple, Samsung, Huawei, millet, OPPO and ViVO etc.
It is all proposed corresponding high-end type, these types have the strong market demand to curved surface protective film, but reply is bent in the market
The protective film of face all has certain problems, at present still without extraordinary solution.
Currently, as shown in Figure 1A, mainstream protective film 10 is generally used PET material in the market, and functional layer 11 is coated on
Pressure-sensitive adhesive layer 15 is arranged in the other side of PET base material 12 in 12 side of PET base material, although PET film intensity is high, stiffening property is good, light transmittance
Height, mist degree are low, have good mechanical performance and optical property, have very extensive application in display screen protection field.But
The hot bending film of PET base material is for protecting curved surface, and there are following some problems:
A. from the perspective of design principle, hot bending film uses PET material, hardness and stiffness itself is larger, dimensionally stable
Property higher, heat distortion temperature with higher, although can make under heat and pressure, deformation occurs, needs 270 DEG C or more
High temperature and higher die pressure and heat-insulation pressure keeping time；
B. as shown in Figure 1B, since conventional PET protection film stiffening property is higher, can be tilted at screen-bending position, portion
Divide and forms good fitting.Especially touch screen, in order to increase the slipping that finger is operated in screen surface, glass surface is all
Anti-fingerprint (AF) processing is done, surface can be very low, and pressure sensitive adhesive is not high to its peel strength, this protects conventional PET
The tilting problem of film is more serious.From the point of view of technological angle, the precision controlling of temperature and pressure and mold that hot bending needs is wanted
Ask higher, if control is improper, the deformational stress formed under high moderate pressure is remained to product warpage is caused, cannot be to curved form
At preferable fitting；
When c. due to hot pressing, protective film is the process film with surface layer or bottom while carrying out hot pressing, different film layer materials, heat
The interaction of deformation coefficient and interlayer also has an impact to the performance of final products, therefore influence factor is more, technology difficulty compared with
Greatly.
Summary of the invention
In order to overcome the above problems, the utility model provides a kind of protective film, including flexible parent metal；Functional layer is set to
The side of the flexible parent metal；Urethane material is set to side of the flexible parent metal far from functional layer；Pressure-sensitive adhesive layer, setting
In side of the urethane material far from flexible parent metal；The urethane material with a thickness of 20 μm -150 μm.
Further, one layer of glue-line is further included, is set between the flexible parent metal and urethane material.
Further, the glue-line with a thickness of 2 μm -30 μm.
Further, the glue-line is acrylic glue or silica gel.
Further, the light transmittance of the urethane material is greater than 80%, mist degree less than 3%
Further, the urethane material is TPU membrane.
Further, the pressure-sensitive adhesive layer with a thickness of 10 μm~50 μm.
Further, the light transmittance of the protective film is greater than 90%, and mist degree is less than 2%.
Further, the functional layer with a thickness of 20 μm -30 μm.
The problem of it is big that the utility model by the protective film largely improves PET hardness, is bonded bad warpage,
The solvent penetration residual and volatile organic matter generated when further efficiently solving the direct coating function layer of urethane material
The high problem of content, improves binding yield.
Detailed description of the invention
The Figure of description for constituting a part of the invention is used to provide further understanding of the present invention, and of the invention shows
Examples and descriptions thereof are used to explain the present invention for meaning property, does not constitute improper limitations of the present invention.In the accompanying drawings:
Figure 1A is the structural schematic diagram of protective film in the prior art
Figure 1B is the schematic diagram that protective film is affixed on object in the prior art
Fig. 2A is the structural schematic diagram of an embodiment of the present invention protective film
Fig. 2 B is the schematic diagram that an embodiment of the present invention protective film is affixed on object
Fig. 3 is the structural schematic diagram of another embodiment protective film of the utility model
Specific embodiment
It should be noted that in the absence of conflict, the feature in embodiment and embodiment in the present invention can phase
Mutually combination.The present invention will be described in detail below with reference to the accompanying drawings and embodiments.
In order to enable those skilled in the art to better understand the solution of the present invention, below in conjunction in the embodiment of the present invention
Attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is only
The embodiment of a part of the invention, instead of all the embodiments.Based on the embodiments of the present invention, ordinary skill people
The model that the present invention protects all should belong in member's every other embodiment obtained without making creative work
It encloses.
As shown in Figure 2 A, the utility model provides a kind of protective film 20, including flexible parent metal 22；Functional layer 21, is set to
The side of the flexible parent metal 22；Urethane material 24 is set to side of the flexible parent metal 22 far from functional layer 21；Pressure sensitive adhesive
Layer 25, is set to side of the urethane material 24 far from flexible parent metal 21；The urethane material 24 is to be with polyurethane
Primary raw material, with a thickness of 20 μm -150 μm, if too thick, in use process, edge cross-section is larger, is influenced to hold by artificial external force
Easily there is bad phenomenon of coming unglued, and the effect is relatively poor for the too thick anti-zoned pressure of polyurethane material, so that it is bad to will affect product appearance, such as
Fruit is too thin, and product stiffening property is smaller, is not easy to fitting operation, and since urethane material/flexible parent metal ratio reduces, soft
The stress of property substrate is larger, is easy to appear the bad problem of warpage.As shown in Figure 2 B, polyurethane has good elasticity, can
The tilting stress for buffering crooked position solves even if still being able to be bonded curve screens well there are the biggish PET of stiffening property
The problem of edge tilts.The light transmittance of the urethane material 24 is greater than 80%, mist degree less than 3%, in the pressure-sensitive adhesive layer
After fitting, the injustice of urethane material surface micro-structure has been filled up, has reduced the protective film aggregate optical effect after diffusing reflection
Light transmittance light rate be greater than 90%, mist degree is less than 2%.The pressure-sensitive adhesive layer is with a thickness of 10 μm~50 μm.
In the embodiment, shown flexible parent metal 22 is selected from the preferable material of solvent resistances such as PET, PMMA, PP, preferably PET,
The coating function layer 21 on the flexible parent metal 22, is utilized the solvent resistance of the flexible parent metal, avoids urethane material
The solvent penetration residue problem generated when 24 direct coating function layer 21, volatile organic content are effectively reduced.It is described
Flexible parent metal with a thickness of 2 μm~100 μm, light transmittance>80%, mist degree<3%, PET stiffening property is good, and hardness is high, can effectively improve poly-
Urethane-protected film draws the problem of impression mark, promotes the application experience of client.The method that urethane material 24 can use coating,
Polyurethane solutions pass through coating apparatus, are coated directly on substrate, form by baking oven for drying solidification, form one in substrate surface
The uniform polyurethane coating of layer.
In various embodiments, the functional layer 21 with a thickness of 2 μm~30 μm, selected from anti-finger print layer, antiglare layer
One kind or combinations thereof plays anti-dazzle, reduces reflective effect, convenient for using in the stronger situation of light；Consisting of
One or several kinds of combinations or modified acroleic acid tree of the polymer such as acrylic resin, polyurethane resin, polyester resin
One or more of combinations of rouge, modified polyurethane resin, modified polyester resin reach the mesh of wear-resisting, selfreparing, anti-dazzle
's.It also may include the organic or inorganic assistant such as siliceous, fluorine-containing simultaneously, reach anti-fingerprint effects.
Fig. 3 is another embodiment of the utility model, provides a kind of protective film 30, including flexible parent metal 32；Functional layer
31, it is set to the side of the flexible parent metal 32；Urethane material 34 is set to one of flexible parent metal 32 far from functional layer 31
Side, the urethane material 34 with a thickness of 20-150 μm；Glue-line 33, setting and flexible parent metal 32 and urethane material 34
Between, pressure-sensitive adhesive layer 35 is set to side of the urethane material 34 far from flexible parent metal 31；Wherein, the glue-line 33 is silicon
Glue or acrylic glue, with a thickness of 2 μm~30 μm, light transmittance>80%, mist degree<3%, the glue-line 33 has certain elasticity, rises
To the effect of buffering, when protective film is when bending, warpage is reduced.In the embodiment, urethane material 34 can be multiple
The TPU membrane of conjunction, using polyurethane resin as primary raw material, by add other auxiliary agents formed thin film, with a thickness of 20 μm~
100 μm, light transmittance>80%, mist degree<3%, TPU is flexible membrane, to a certain extent can surface microscopic defect and bending to screen
The rough and uneven in surface of position is attached well, is more advantageous to the fitting of protective film entirety, promotes binding yield.TPU membrane simultaneously
It is compound by glue-line 33 and flexible parent metal 31, warpage can not only be so prevented, also as there is glue-line 33 that can preferably be effectively improved
Polyurethane protective film draws the problem of impression mark.
The embodiment may be accomplished by:
Embodiment 1:
(1) it is coated with acrylic glue on a pet film, composite construction 1 is then bonded into TPU membrane；
(2) in the side the PET coating function layer of composite construction 1, composite construction 2 is made；
(3) pressure sensitive adhesive is applied on composite construction 2, can be directly coated with, and pressure sensitive adhesive first can also be applied to release film
On, it is then transferred on composite construction 2, the protective film of the utility model is made.
Embodiment 2:
(1) composite construction 1 is made in the coating function layer in PET base material；
(2) it is coated with silica gel on the side PET of composite construction 1, while is bonded TPU membrane, composite construction 2 is made；
(3) pressure sensitive adhesive is applied on the side of TPU membrane of composite construction 2, can be directly coated with, can also first applied 5
It on cloth to release film, is then transferred on composite construction 2, the protective film of the utility model is made.
Embodiment 3:
(1) pressure sensitive adhesive is applied in TPU membrane, composite construction 1 is made；
(2) composite construction 2 is made in the coating function layer on PET
(3) it is coated with acrylic glue in the side PET of composite construction 1, while is bonded composite construction 2, the utility model is made
Protective film.
It should be noted that specific embodiment is only the explanation to technical solution of the present invention, should not be managed
Solution is restriction to technical solution of the present invention, any only to make locally to change using the substantive summary of the invention of the present invention, Reng Yingluo
Enter in protection scope of the present invention.
Claims (9)
1. a kind of protective film, including
Flexible parent metal；
Functional layer is set to the side of the flexible parent metal；
Urethane material is set to side of the flexible parent metal far from functional layer；
Pressure-sensitive adhesive layer is set to side of the urethane material far from flexible parent metal；
The urethane material with a thickness of 20 μm -150 μm.
2. protective film according to claim 1, it is characterised in that further include one layer of glue-line, be set to the flexible parent metal and
Between urethane material.
3. protective film according to claim 2, it is characterised in that the glue-line with a thickness of 2 μm -30 μm.
4. protective film according to claim 2, it is characterised in that the glue-line is acrylic glue or silica gel.
5. protective film according to claim 1, it is characterised in that the urethane material light transmittance is greater than 80%, mist degree
Less than 3%.
6. protective film according to claim 1, it is characterised in that the urethane material is TPU membrane.
7. protective film according to claim 1, it is characterised in that the pressure-sensitive adhesive layer with a thickness of 10 μm~50 μm.
8. protective film according to claim 1, it is characterised in that the light transmittance of the protective film is greater than 90%, and mist degree is less than
2%.
9. protective film according to claim 1, it is characterised in that the functional layer with a thickness of 20 μm -30 μm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820978926.1U CN208995427U (en) | 2018-06-25 | 2018-06-25 | A kind of curved surface protective film |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820978926.1U CN208995427U (en) | 2018-06-25 | 2018-06-25 | A kind of curved surface protective film |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208995427U true CN208995427U (en) | 2019-06-18 |
Family
ID=66796009
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820978926.1U Active CN208995427U (en) | 2018-06-25 | 2018-06-25 | A kind of curved surface protective film |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208995427U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111087937A (en) * | 2019-12-05 | 2020-05-01 | 江苏晶华新材料科技有限公司 | Be applied to protection film of curved surface screen cell-phone |
| CN112521882A (en) * | 2019-09-18 | 2021-03-19 | 华为技术有限公司 | Protection film, protection film subassembly, display screen subassembly and terminal |
-
2018
- 2018-06-25 CN CN201820978926.1U patent/CN208995427U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112521882A (en) * | 2019-09-18 | 2021-03-19 | 华为技术有限公司 | Protection film, protection film subassembly, display screen subassembly and terminal |
| CN111087937A (en) * | 2019-12-05 | 2020-05-01 | 江苏晶华新材料科技有限公司 | Be applied to protection film of curved surface screen cell-phone |
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