CN112239635A - Curved surface screen protective film and manufacturing method thereof - Google Patents
Curved surface screen protective film and manufacturing method thereof Download PDFInfo
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- CN112239635A CN112239635A CN202010324715.8A CN202010324715A CN112239635A CN 112239635 A CN112239635 A CN 112239635A CN 202010324715 A CN202010324715 A CN 202010324715A CN 112239635 A CN112239635 A CN 112239635A
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- film
- tpu
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- screen
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J7/00—Adhesives in the form of films or foils
- C09J7/20—Adhesives in the form of films or foils characterised by their carriers
- C09J7/29—Laminated material
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J7/00—Adhesives in the form of films or foils
- C09J7/30—Adhesives in the form of films or foils characterised by the adhesive composition
- C09J7/38—Pressure-sensitive adhesives [PSA]
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2433/00—Presence of (meth)acrylic polymer
- C09J2433/006—Presence of (meth)acrylic polymer in the substrate
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2469/00—Presence of polycarbonate
- C09J2469/006—Presence of polycarbonate in the substrate
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2475/00—Presence of polyurethane
- C09J2475/006—Presence of polyurethane in the substrate
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Laminated Bodies (AREA)
Abstract
The invention discloses a curved surface protective film and a manufacturing method thereof, wherein the curved surface protective film is used for being attached to a curved surface screen, a TPU film is provided with a reinforcing layer, the reinforcing layer is positioned in the center of the TPU film and is embedded in the TPU film, the reinforcing layer and a main screen of the curved surface screen have the same area, the TPU with the reinforcing layer is attached to the main screen, and two sides of the TPU film can be attached to curved surfaces on two sides of the curved surface screen. During production, the reinforcing layer is cut according to the size of the main screen of the mobile phone, the reinforcing layer is embedded in the TPU in a hot pressing or coating mode, the self-repairing layer is coated on the reinforcing layer, and the pressure-sensitive adhesive layer on the other side is coated on the reinforcing layer. Due to the arrangement of the reinforcing layer, the invention can solve the problems of difficult film pasting and flatness after film pasting, can be well thermally bent and pasted on the curved surface part, does not rebound or delaminate, and after long-time use or at extreme temperature, the TPU film can not stretch, deform or delaminate due to the support of the reinforcing layer, and the appearance of the whole protective film can not be influenced, thereby achieving the purpose of long-term use.
Description
Technical Field
The invention relates to an accessory product of an electronic product, in particular to a protective film of a display screen.
Background
At present, two 3D TPU curved surface screen protective films are available in the market. The TPU film (polyurethane film or other elastomers) is a full-elastic body, and has the advantages of good bending forming effect, and the defects that the large-area flat part in the middle of the screen is too soft when being attached, the attachment difficulty is high, the flatness after attachment is poor, the deformation of the TPU film is possibly caused after long-term use or under extreme high and low temperature conditions, the use effect of the screen is influenced, and the protective film can be seriously separated.
The other is a TPU elastomer protective film with a PET film (the PET film can be arranged on the upper surface or the lower surface or the middle of the TPU film or the PU film, but the PET film has equal area), although the problems of the adhesion and the flatness of the curved screen are solved, the bending performance of the curved screen at the places with large curved surface angles at the two sides of the curved screen is poor, the hardness is increased due to the addition of the PET film, the rebound resilience is better, and the curved screen at the places with large curved surface angles at the two sides of the curved screen generates rebound delamination after long-time use.
Disclosure of Invention
The technical problems solved by the invention are as follows: the curved screen protective film is provided with the reinforcing layer, so that a large-area plane part of the curved screen can be attached smoothly, and the TPU film is prevented from being deformed in long-term use or under extreme high and low temperature conditions; this curved surface screen protection film both sides have flexible TPU membrane, and the laminating in the place that curved surface screen bending angle is big of being convenient for avoids not taking place the delaminating of kick-backing after long-time the use.
In order to solve the above technical problems, the present invention provides the following technical problems: the utility model provides a curved surface screen protection film for attached on curved surface screen is equipped with the TPU membrane, and the TPU membrane is equipped with the enhancement layer, and the enhancement layer is located the intermediate position of TPU membrane, inlays in the TPU membrane, and the enhancement layer is shielded equal area with the curved surface, and the both sides of TPU membrane can be attached on the curved surface on curved surface screen both sides.
The invention relates to a curved screen protective film, which is characterized in that a reinforcing layer with the same size is cut according to the sizes of different main screens of curved screens, the reinforcing layer is embedded in the middle of a TPU film, the peripheral edge of the reinforcing layer has a certain distance with the peripheral edge of the TPU film, the distance between the upper edge and the lower edge is small, the distance between the two edges is large, the TPU film parts positioned on the two sides of the periphery of the reinforcing layer are bent parts and are attached to the curved surfaces on the two sides of the curved screen, namely the curved screen is positioned on the periphery of the main.
The manufacturing method comprises the following steps:
the reinforcing layer is embedded in the middle of the TPU film and is mainly realized by two methods: a method is to cut the reinforced layer according to the size of the main screen of the curved screen, the thickness of the reinforced layer is preferably 20-50 microns, a layer of high-permeability TPU film (the thickness is 10-100 microns) is coated firstly, then the reinforced layer is placed at a proper position according to the size of the curved screen, air between the reinforced layer and the high-permeability TPU film is removed through rolling or hot pressing, the reinforced layer is tightly attached to the TPU film, a layer of high-permeability TPU film is uniformly coated on the reinforced layer, and the reinforced layer is tightly wrapped by the upper TPU film and the lower TPU film. The other method is that the reinforcing layer is cut according to the size of the main screen with different curved surfaces (the thickness of the reinforcing layer is better between 20 and 50 microns), the reinforcing layer is placed at a proper position on the high-permeability thermoplastic TPU film according to the size of the curved surface screen, the reinforcing layer and the high-permeability thermoplastic TPU are adhered together in a hot pressing mode of ultrasonic wave, high frequency, hot roller and the like, the other layer of high-permeability thermoplastic TPU film is hot pressed on the high-permeability thermoplastic TPU film with the reinforcing layer surface in a hot pressing mode of ultrasonic wave, high frequency, hot roller and the like, and the reinforcing layer is tightly wrapped in the upper high-permeability thermoplastic TPU film and the lower high-permeability thermoplastic TPU film. The reinforcing layer can also be embedded in the TPU film by combining hot pressing and coating of the high-permeability thermoplastic TPU film. The thickness of the high-permeability TPU film with the reinforcing layer is controlled within 50-150 microns.
And coating a self-repairing layer on one surface of the high-transparency TPU film with the reinforcing layer, and coating a PET pressure-sensitive adhesive protective film after the TPU film passes through an oven, wherein the thickness of the self-repairing layer is 10-50 microns. The self-repairing layer mainly meets the self-repairing of small scratches for 1-30 seconds; smooth, the friction coefficient is less than 0.3, and the water drop angle is more than 100 degrees.
Coating a special pressure-sensitive adhesive on the other side of the high-transparency TPU film with the reinforcing layer, wherein the pressure-sensitive adhesive is firmly attached to the high-transparency TPU film, and then covering a release film on the surface of the pressure-sensitive adhesive.
Due to the arrangement of the reinforcing layer, the problem that the film is difficult to adhere and the flatness of the adhered film can be solved, the TPU film is good in bending adhesion at the curved surface part due to flexibility and does not rebound or delaminate, and after long-time use or at extreme temperature, the TPU film cannot stretch, deform or delaminate due to the support of the reinforcing layer, the appearance of the whole protective film cannot be influenced, and the purpose of long-term use can be achieved.
The reinforcing layer is coated or hot-pressed on the TPU film, the self-repairing layer is arranged above the TPU film, the protective layer is arranged above the self-repairing layer, and the release layer is arranged below the TPU film.
Drawings
The invention is further described below with reference to the accompanying drawings:
FIG. 1 is a schematic view of a curved screen protective film;
fig. 2 is a top view of fig. 1.
FIG. 3 is a cross-sectional view of a curved screen with a protective film attached to the curved screen
The symbols in the drawings illustrate that:
10. a TPU film;
20. a reinforcing layer;
30. a self-healing layer;
40. a protective layer; 41. a first pressure-sensitive adhesive layer;
50. a release layer; 51. a second pressure-sensitive adhesive layer;
60. a curved screen.
Detailed Description
A curved screen protection film is used for being attached to a curved screen to protect the curved screen, the curved screen is a display screen with the edge having curvature,
with reference to fig. 1 and 2, the curved screen protective film is provided with a TPU film 10, the TPU film is provided with a reinforcing layer 20, the reinforcing layer is located at the center of the TPU film, the reinforcing layer has the same area as the main screen of the curved screen, and two sides of the TPU film can be attached to the curved surfaces at two sides of the curved screen. The main screen of the curved screen, namely the flat part of the curved screen, occupies most of the area of the curved screen.
Alternatively, the reinforcing layer 20 is a PC film or a PMMA film.
The reinforcing layer 20 is coated or hot pressed on the TPU film 10. The reinforcing layer 20 is coated on the TPU film 10, and the reinforcing layer is positioned in the TPU film 10; the reinforcing layer 20 is hot-pressed onto the TPU film 10, and the reinforcing layer may be on the upper surface of the TPU film 10 or embedded in the TPU film 10.
A self-repairing layer 30 is arranged above the TPU film 10, specifically, the middle part of the self-repairing layer 30 is attached to the reinforcing layer 20, and the peripheral edge of the self-repairing layer is attached to the peripheral edge of the TPU film 10. Alternatively, the self-repairing resin described in patent document CN 109705382a is used as the material of the self-repairing layer 30.
Before the protective film is not attached to the curved screen, a protective layer 40 is arranged above the self-repairing layer 30, and a release layer 50 is arranged below the TPU film 10. The protective layer 40 is attached to the upper surface of the self-repairing layer 30 through the first pressure sensitive adhesive layer 41; the release layer 50 is attached to the lower surface of the TPU film 10 by a second pressure sensitive adhesive layer 51. Alternatively, the protective layer 40 is a PET film, and the release layer 50 is a fluorine release film. Alternatively, the protective film of the present invention may be formed by not coating the self-repairing layer 30 on the TPU film 10, and forming a hardened layer on the TPU film 10 instead of the self-repairing layer 30.
When the protective film is attached to the curved screen, an operator cuts the protective film according to the size of the curved screen, the release layer 50 is torn off, the protective film is attached to the curved screen, the reinforcing layer 20 is vertically overlapped with the main screen of the curved screen, the protective film on the periphery of the reinforcing layer 20 is attached to the curved surface on the periphery of the curved screen, and finally the pressure-sensitive adhesive protective layers 41 and 40 are torn off.
If the protective film attached to the curved screen has the biaxially oriented PET film (or other biaxially oriented films), the polarization angle of the protective film can be increased, which is equivalent to that light emitted by the curved screen can be scattered or glare after passing through the screen protective film with the PET film. The invention avoids the PET film remaining on the curved screen, and the PMMA and PC films are used, thereby not generating polarization angle, reducing glare and light scattering and making the picture more real.
A method for using the hot bending protective film comprises the steps of cutting the hot bending protective film according to the size of a mobile phone film, putting the cut curved screen protective film on special film sticking equipment, tearing off a release layer 50 of the curved screen protective film, sticking the curved screen protective film on a mobile phone screen, and finally tearing off pressure sensitive adhesive protective layers 41 and 40.
The above description is only a preferred embodiment of the present invention, and for those skilled in the art, the present invention should not be limited by the description herein, since various changes and modifications can be made in the details of the embodiment and the application range according to the spirit of the present invention.
Claims (9)
1. The utility model provides a curved surface screen protection film for attached on curved surface screen is equipped with TPU membrane (10), its characterized in that: the TPU membrane is provided with a reinforcing layer (20), the reinforcing layer is located at the central position of the TPU membrane and is embedded in the TPU membrane, the reinforcing layer and the main screen of the curved screen have the same area, and two sides of the TPU membrane can be attached to the curved surfaces on two sides of the curved screen.
2. The curved screen protective film of claim 1, wherein: the TPU film is high in transparency, the light transmittance is greater than 90%, and the Shore hardness is 80-95A.
3. The curved screen protective film of claim 1, wherein: the reinforcing layer (20) is a PC film or a PMMA film.
4. The curved screen protective film of claim 1 or 3, wherein: the reinforcing layer (20) is embedded in the TPU film (10).
5. The curved screen protection film as claimed in claim 4, wherein said reinforcement layer (20) embedded in said TPU film (10) is formed by coating or hot pressing.
6. The curved screen protective film of claim 4, wherein: a self-repairing layer (30) is arranged above the TPU film (10).
7. The curved surface protective film according to claim 4, wherein: a special second pressure-sensitive adhesive layer (51) is arranged below the TPU, and the second pressure-sensitive adhesive layer can be attached to a curved screen with the water drop angle of the screen surface larger than 110 degrees.
8. The curved screen protective film of claims 6 and 7, wherein: first pressure-sensitive adhesive protective layers (41 and 40) are arranged above the self-repairing layer (30), and a release layer (50) is arranged below the second pressure-sensitive adhesive layer (51).
9. The curved screen protective film of claim 7. The method is characterized in that: the second pressure sensitive adhesive layer (51) can be attached to the curved display.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2019224687983 | 2019-12-31 | ||
| CN201922468798 | 2019-12-31 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112239635A true CN112239635A (en) | 2021-01-19 |
Family
ID=74170630
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010324715.8A Pending CN112239635A (en) | 2019-12-31 | 2020-04-23 | Curved surface screen protective film and manufacturing method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112239635A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1966258A (en) * | 2005-11-17 | 2007-05-23 | 宣德科技股份有限公司 | Surface covering and its producing method |
| CN201256494Y (en) * | 2008-08-04 | 2009-06-10 | 徐钲鉴 | 3D curved surface coverage construction for electronic apparatus shell |
| CN104842592A (en) * | 2015-04-10 | 2015-08-19 | 陆争 | Curved screen protective film and manufacturing method thereof |
| CN206317496U (en) * | 2016-12-16 | 2017-07-11 | 广州易航电子有限公司 | A kind of Curved screen all standing high rigidity diaphragm |
| CN107936860A (en) * | 2017-10-23 | 2018-04-20 | 东莞市纳利光学材料有限公司 | A kind of flexible full bag mantle and preparation method thereof |
| CN208395090U (en) * | 2018-04-26 | 2019-01-18 | 胡秀叶 | Screen protector structure |
| CN209167630U (en) * | 2019-01-05 | 2019-07-26 | 中山容大光学科技有限公司 | Curved surface security protection optical lens piece |
| CN209428448U (en) * | 2018-09-30 | 2019-09-24 | 宁波惠之星新材料科技有限公司 | Finger print mobile phones protector under a kind of photoelectric screens |
-
2020
- 2020-04-23 CN CN202010324715.8A patent/CN112239635A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1966258A (en) * | 2005-11-17 | 2007-05-23 | 宣德科技股份有限公司 | Surface covering and its producing method |
| CN201256494Y (en) * | 2008-08-04 | 2009-06-10 | 徐钲鉴 | 3D curved surface coverage construction for electronic apparatus shell |
| CN104842592A (en) * | 2015-04-10 | 2015-08-19 | 陆争 | Curved screen protective film and manufacturing method thereof |
| CN206317496U (en) * | 2016-12-16 | 2017-07-11 | 广州易航电子有限公司 | A kind of Curved screen all standing high rigidity diaphragm |
| CN107936860A (en) * | 2017-10-23 | 2018-04-20 | 东莞市纳利光学材料有限公司 | A kind of flexible full bag mantle and preparation method thereof |
| CN208395090U (en) * | 2018-04-26 | 2019-01-18 | 胡秀叶 | Screen protector structure |
| CN209428448U (en) * | 2018-09-30 | 2019-09-24 | 宁波惠之星新材料科技有限公司 | Finger print mobile phones protector under a kind of photoelectric screens |
| CN209167630U (en) * | 2019-01-05 | 2019-07-26 | 中山容大光学科技有限公司 | Curved surface security protection optical lens piece |
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Application publication date: 20210119 |
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| WD01 | Invention patent application deemed withdrawn after publication |