CN219507856U

CN219507856U - Protective film with high explosion-proof and unlocking sensitivity

Info

Publication number: CN219507856U
Application number: CN202222051242.6U
Authority: CN
Inventors: 蓝志锋; 施明; 张建伟; 谢晓军; 莫陈漂
Original assignee: Guangzhou Ehang Electronic Co ltd
Current assignee: Guangzhou Ehang Electronic Co ltd
Priority date: 2022-08-04
Filing date: 2022-08-04
Publication date: 2023-08-11
Anticipated expiration: 2032-08-04

Abstract

The utility model discloses a protective film with high explosion-proof and unlocking sensitivity, which belongs to the technical field of protective films. The explosion-proof protective film comprises a plastic polyurethane elastomer layer and a Newton-ring-free polyethylene terephthalate plastic hardening layer, wherein the Newton-ring-free polyethylene terephthalate plastic hardening layer is attached to the upper surface of the plastic polyurethane elastomer layer, and the Newton-ring-free polyethylene terephthalate plastic is coated with hardening liquid. The utility model discloses a protective film with high explosion-proof and unlocking sensitivity, which can effectively buffer impact, prevent screen explosion and can be unlocked quickly.

Description

Protective film with high explosion-proof and unlocking sensitivity

Technical Field

The utility model belongs to the technical field of protective films, and particularly relates to a protective film with high explosion-proof and unlocking sensitivity.

Background

Along with the continuous development of the informatization industry, people use informatization products more and more, and the protective film is widely applied to display screens of various electronic products so as to protect the display screens. The mobile phones used by most people are smart mobile phones at present, and the main characteristic of the smart mobile phones is that the used screens are fragile, so that the screens of the mobile phones are easy to break in the event of carelessness. The impact-resistant buffer materials used for the explosion-proof films existing in the market at present mainly depend on the fact that the explosion-proof effect is achieved by increasing the thickness of the protective film, but the impact resistance of the materials is limited, when the protected object is subjected to severe external force, the protected object is still subjected to strong impact damage, and due to the increase of the thickness of the materials, the unlocking function of many mobile phones becomes sluggish and even cannot be unlocked.

Disclosure of Invention

In order to overcome the defects in the prior art, one of the purposes of the utility model is to provide a protective film with high unlocking sensitivity, wherein the higher the luminous flux is, the quick unlocking can be realized.

The second purpose of the utility model is to provide an explosion-proof protective film, which can effectively buffer impact and prevent screen explosion.

In order to achieve the above purpose, the present utility model adopts the following technical scheme:

the protective film with high unlocking sensitivity comprises a plastic polyurethane elastomer layer and further comprises an unpolarized OCA adhesive layer, wherein the polarization direction of the unpolarized OCA adhesive layer is the same as the direction of linearly polarized light emitted from a screen. Preferably, the antifouling treatment agent coating is a coating formed by adding a solvent-type polyurethane coating to leather.

In order to achieve the second purpose, the utility model adopts the following technical scheme:

the explosion-proof protective film comprises a plastic polyurethane elastomer layer and a Newton-ring-free polyethylene terephthalate plastic hardening layer, wherein the Newton-ring-free polyethylene terephthalate plastic hardening layer is attached to the upper surface of the plastic polyurethane elastomer layer, the Newton-ring-free polyethylene terephthalate plastic hardening layer is formed by taking Newton-ring-free polyethylene terephthalate plastic as a base material, carrying out corona treatment on the upper surface and the lower surface of the base material, then coating hardening liquid on the upper surface and the lower surface of the base material, and carrying out photo-curing.

Preferably, the thickness of the hardened layer of the Newtonian-free polyethylene terephthalate plastic is 125-188 mu m.

Preferably, the plastic polyurethane elastomer coating further comprises an unpolarized OCA adhesive layer, wherein the upper surface of the plastic polyurethane elastomer layer is attached to the unpolarized OCA adhesive layer, and the upper surface of the unpolarized OCA adhesive layer is attached to the Newton ring-free polyethylene terephthalate plastic hardening layer.

Preferably, the hardened layer of the non-newton ring polyethylene terephthalate plastic is attached to the upper surface of the non-polarized OCA glue layer according to the angle of the maximum luminous flux.

Preferably, the upper surface of the non-Newton ring polyterephthalic acid plastic hardening layer is adhered with a second polyterephthalic acid plastic release layer.

Preferably, a silica gel layer is attached to the lower surface of the plastic polyurethane elastomer layer.

Preferably, the lower surface of the plastic polyurethane elastomer layer is adhered with a first polyethylene terephthalate plastic release layer.

Preferably, the lower surface of the silica gel layer is attached with the first polyethylene terephthalate plastic release layer.

Compared with the prior art, the utility model has the following beneficial effects:

the utility model provides a protective film with high unlocking sensitivity, which comprises an unpolarized OCA adhesive layer, wherein the polarization direction of the unpolarized OCA adhesive layer is the same as the direction of linearly polarized light emitted from a screen, the light flux is high, the optical fingerprint performance is high, and quick unlocking can be realized.

The utility model provides an explosion-proof protective film, which is formed by tightly combining a plastic polyurethane elastomer layer and a Newton ring-free polyethylene terephthalate plastic hardening layer together under the action of an electrodeless OCA adhesive layer, so that the whole protective film has good hardness and explosion-proof performance, and can realize effective buffer impact and prevent screen explosion.

Drawings

Fig. 1 is a schematic structural view of a protective film with high explosion-proof and unlocking sensitivity provided by the embodiment.

In the figure: 1. a plastic polyurethane elastomer layer; 2. an unpolarized OCA glue layer; 3. a hardened layer of a polyethylene terephthalate plastic without Newton rings; 4. a silica gel layer; 5. a first polyethylene terephthalate plastic release layer; 6. and a second polyethylene terephthalate plastic release layer.

Detailed Description

In order to make the technical problems, technical schemes and beneficial effects to be solved more clearly apparent, the technical schemes of the utility model will be clearly and completely described below with reference to the embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.

Example 1

The protective film with high explosion-proof and unlocking sensitivity in the preferred embodiment of the utility model is shown in a structural schematic diagram in fig. 1, and comprises a plastic polyurethane elastomer layer 1, wherein an electrodeless OCA adhesive layer 2 is attached to the upper surface of the plastic polyurethane elastomer layer 1, the thickness of the electrodeless OCA adhesive layer 2 is 50-125 mu m, and the thickness of the plastic polyurethane elastomer layer 1 is 200-280 mu m, wherein the plastic polyurethane elastomer layer 1 can enable the whole protective film to have extremely strong impact absorption capability, can effectively resist severe impact and extrusion, resist bending, and play a role in preventing screen explosion for mainly resisting external force.

The upper surface of the electrodeless OCA adhesive layer 2 is adhered with a Newton ring-free polyethylene terephthalate plastic hardening layer 3, the Newton ring-free polyethylene terephthalate plastic hardening layer 3 is formed by taking Newton ring-free polyethylene terephthalate plastic as a base material, carrying out corona treatment on the upper surface and the lower surface of the base material, then coating hardening liquid on the upper surface and the lower surface of the base material, and carrying out photo-curing, wherein the Newton ring-free polyethylene terephthalate plastic hardening layer 3 has a relatively flat surface and a thickness of 125-188 mu m, and can enable the protective film to have the hardness of 9H; meanwhile, under the action of the electrodeless OCA adhesive layer 2, the plastic polyurethane elastomer layer 1 and the Newton ring-free polyethylene terephthalate plastic hardening layer 3 are tightly combined together to form a whole, so that the whole protective film has good hardness and explosion-proof performance.

In order to protect the surface of the protective film, a silicone layer 4 is bonded to the lower surface of the plastic polyurethane elastomer layer 1, and a first polyethylene terephthalate plastic release layer 5 is bonded to the lower surface of the silicone layer 4; the second polyethylene terephthalate plastic release layer 6 is attached to the upper surface of the non-Newton ring polyethylene terephthalate plastic hardening layer 3. When the protective film is actually used, the first polyethylene terephthalate plastic release layer 5 and the second polyethylene terephthalate plastic release layer 6 need to be torn, then the side of the protective film with the silica gel layer 4 is attached to the electronic screen, and under the action of the silica gel layer 4, the protective film can be attached to the electronic screen film quickly and efficiently.

The ultrasonic fingerprint technology utilizes the capability of ultrasonic waves to penetrate materials, and echoes with different sizes are generated according to different materials, because the ultrasonic waves are absorbed, penetrated and reflected to different degrees when reaching the surfaces of different materials, and finally the fingerprint information of each person is collected. The ultrasonic wave can also be greatly influenced by the thickness of the film-sticking material, and for the test of unlocking in the ultrasonic unlocking mode, the unlocking rate of the protective film is superior to that of other common films at similar thickness, and for thicker films, the unlocking success rate is higher, and the unlocking rate is better.

Polarized light (light), an optical term, is an electromagnetic wave, which is a transverse wave. The plane formed by the vibration direction and the light wave advancing direction is called a vibration plane, the vibration plane of light is limited to a certain fixed direction, which is called plane polarized light or linear polarized light, and the mobile phone screen protective film made of SRF material has a double refraction effect, namely a film polarization direction. The mobile phone film with the polarization direction can emit linearly polarized light from the mobile phone, and has a great influence on the optical fingerprint performance. After the optical fingerprint module hopes that the screen is pasted with a film, the emergent light is still linearly polarized light. It is generally desirable that the polarization direction of the screen protective film is the same as the direction of the linearly polarized light emitted by the mobile phone screen, so that the optical fingerprint performance after film sticking is the best. The difference between the polarization direction of the diaphragm and the polarization direction of the diaphragm can be usually tested by testing the luminous flux of the diaphragm, wherein the higher the luminous flux is, the better the fingerprint unlocking function is, and the faster the unlocking speed is. Therefore, the protection film with high explosion-proof and unlocking sensitivity in this embodiment uses the electrodeless OCA layer 2, the plastic polyurethane elastomer material 1 with excellent luminous flux, and the angle adjustment of the cured layer 3 of the polyethylene terephthalate plastic without newton rings before lamination, and the maximum luminous flux angle carving is selected to achieve the best luminous flux of the whole film, and the fingerprint unlocking speed is relatively high at this time.

Example 2

The present experimental example selects 188 μm of the plastic hardened layer of the non-newton ring type poly terephthalic acid, 75 μm of the non-polarized OCA layer 3, and the protective film with high explosion-proof and unlocking sensitivity provided in this example performs the hardness test and the unlocking sensitivity test, the hardness test index is hardness and screen breakage rate, the unlocking sensitivity test index is luminous flux, fingerprint recording time, fingerprint recording degree, and the comparison is made with 4 commercially available explosion-proof protective films, and the results are shown in table 1.

Operation of hardness index test: the japanese mitsubishi standard hardness pencil and the small hand pencil durometer were prepared. Before use, the trolley fastening screw is loosened, the measuring surface and the guiding surface are wiped clean, and the coating panel is placed on a fixed horizontal plane. The pencil is ground with sand paper and horizontally put into the inclined hole of the trolley to form an angle of 45 degrees, the pencil is rotationally fixed by twisting, the position of the pencil is fixed by taking away the pad pressing plate, the trolley is pushed forward by about 7mm at the speed of 0.5mm/s, different positions are changed on the same surface of the coating, the operation is repeated five times, and the coating scratched by the pencil is observed: in five scratch tests, if three or more than three substrates are not scratched to the template, then the pencil with the high grade hardness grade is selected, and the detection steps are repeated.

Operation of screen breakage rate test: the ball falling impact test is carried out by using 300g of small balls, and the weight of the mobile phone on the market is basically light and thin, and is not more than 300g, the protective film is attached to plain glass without toughening treatment, the height is 1.5m, the ball falling impact test is carried out for 3 times, and the ball falling impact test is carried out for 1 group, and the ball falling impact test is carried out for ten groups; and recording the breaking condition of the protective film and/or plain glass, and calculating to obtain the breaking rate Rn of the product to be detected.

The calculation formula is as follows:

TABLE 1

As can be seen from the comparison test results of Table 1, compared with 4 kinds of anti-explosion protection films purchased in the market, the protection film with high anti-explosion and unlocking sensitivity of the embodiment has a good anti-scratch function, can well protect a screen under the impact of 300g of a small ball and 1.5 meters, reduces the risk of screen breakage, can realize quick unlocking and quick fingerprint recording under the same thickness, has the defect that the anti-explosion protection film purchased in the market has the same thickness, has the defect that the anti-explosion protection film needs to be pressed to record the fingerprint, has longer time, and also has the risk of no record.

Example 3

The present experimental example selects a 125 μm non-newton ring poly (terephthalic acid) plastic hardening layer 3 and a 75 μm electrodeless OCA layer 2, and the protection film with high explosion-proof and unlocking sensitivity provided in this example performs a hardness test and an unlocking sensitivity test, wherein the hardness test index is hardness and screen breakage rate, the unlocking sensitivity test index is luminous flux, fingerprint recording time and fingerprint recording degree, and the results are shown in table 2.

TABLE 2

As can be seen from the comparison test results of Table 2, compared with 4 kinds of explosion-proof protection films purchased in the market, the protection film with high explosion-proof and unlocking sensitivity of the embodiment has a good scratch-proof function, can well protect a screen under the impact of 300g of a small ball and 1.5 meters, reduces the risk of screen fragmentation, can realize quick unlocking and quick fingerprint recording under the same thickness, has the defect of needing to press to record fingerprints with force for the explosion-proof protection films purchased in the market, has longer time, and also has the risk of record failure.

The above embodiments are only preferred embodiments of the present utility model, and the scope of the present utility model is not limited thereto, but any insubstantial changes and substitutions made by those skilled in the art on the basis of the present utility model are intended to be within the scope of the present utility model as claimed.

Claims

1. The protective film with high explosion-proof and unlocking sensitivity is characterized by comprising a plastic polyurethane elastomer layer, an OCA adhesive layer without polarization and a hardening layer of polyethylene terephthalate without Newton rings; the polarization direction of the electrodeless OCA adhesive layer is the same as the direction of linearly polarized light emitted from a screen; the upper surface of the plastic polyurethane elastomer layer is attached to the electrodeless OCA adhesive layer, and the upper surface of the unpolarized OCA adhesive layer is attached to the Newton ring-free polyethylene terephthalate plastic hardening layer.

2. The protective film with high explosion and unlocking sensitivity according to claim 1, wherein the hardened layer of the newton-free polyethylene terephthalate plastic has a thickness of 125-188 μm.

3. The protective film with high explosion-proof and unlocking sensitivity according to claim 1, wherein the hardened layer of the non-Newton ring polyethylene terephthalate plastic is attached to the upper surface of the non-polarized OCA glue layer according to the angle of the maximum luminous flux.

4. The protective film with high explosion and unlocking sensitivity according to claim 1, wherein the upper surface of the hardened layer of the non-newton ring type polyethylene terephthalate plastic is attached with a second release layer of the polyethylene terephthalate plastic.

5. The protective film with high explosion and unlocking sensitivity according to claim 1, wherein a silica gel layer is attached to the lower surface of the plastic polyurethane elastomer layer.

6. The protective film with high explosion-proof and unlocking sensitivity according to claim 5, wherein the lower surface of the silica gel layer is attached with a first polyethylene terephthalate plastic release layer.