Anti-tearing PET (Polyethylene Terephthalate) membrane

Abstract

The utility model provides an anti-tear PET (Polyethylene Terephthalate) membrane which comprises a back adhesive layer and a first UV (Ultraviolet) layer, and release paper or a release film is adhered to the first UV layer through the back adhesive layer; the first circuit layer and the second circuit layer are distributed on the front face and the back face of the head end and the tail end of the base material layer in a staggered mode and then connected with the filling block, so that the head end of the anti-tearing PET membrane can be pasted to the liquid crystal layer through the back glue layer, the tail end of the anti-tearing PET membrane keeps a distance from the liquid crystal layer, and in other words, half of the anti-tearing PET membrane is designed to be easy to tear. If the liquid crystal layer fluctuates up and down, as the first circuit layer and the second circuit layer are connected through the filling block, the circuit layer at the bent position cannot be broken even if the circuit layer is affected by shearing force on the two sides, and therefore the liquid crystal display panel is not prone to breakage. And the influence of accumulated deformation and vibration on the anti-tearing PET film is effectively avoided, so that the reliability of equipment is improved.

Description

Technical Field

[0001] The utility model relates to an anti-tearing PET film, belonging to the field of anti-tearing films for POS machines. Background Art

[0002] As a financial transaction terminal, in order to prevent criminals from illegally modifying POS terminal devices to install bugs and steal sensitive information such as cardholders' account data and PINs, the reliability and hardware security of the POS terminal itself are crucial. Currently, in order to ensure the hardware security of POS terminal devices, various forms of security anti-disassembly detection switches are generally installed inside the POS terminal to detect whether the device's shell has been illegally opened.

[0003] Currently, for large-screen touch-screen POS terminals, in order to prevent the liquid crystal from being illegally opened, there is generally a security detection switch under the liquid crystal screen inside. Generally, an easily tearable PET with a button detection signal is used and pasted on the back of the liquid crystal. When the liquid crystal is illegally lifted or opened, the easily tearable PET is lifted due to the lifting of the liquid crystal, resulting in the tearing of its circuit layer and the breaking of the circuit, and the security detection signal cannot receive a normal level, thereby triggering the alarm of the security chip to achieve the protection of the hardware security of the device.

[0004] For example, the existing patent application with the application number CN201921415462.4 and the patent application name of an anti-tearing film sheet containing a snap dome reveals that it includes an insulating layer, a main line layer, a glue layer, and a snap dome layer arranged in sequence; the insulating layer is made of PET material; the main line layer is a printed anti-tearing circuit; the snap dome layer includes a plurality of evenly arranged metal elastic sheets. This anti-tearing film is pasted on the POS. When the printed anti-tearing circuit is torn, the conductive circuit will be damaged, which can prevent the unauthorized disassembly and assembly of the POS machine and improve the overall security of the POS machine.

[0005] Another example is the existing patent application with the application number CN201721635666.X and the patent application name of a POS machine anti-tearing circuit board, which reveals that the POS machine anti-tearing circuit board includes a PET film layer and an alarm device. The PET film layer is printed with a trigger circuit for triggering the alarm device through an anti-tearing ink layer. The trigger circuit wires are in a serpentine shape, and an insulating layer for isolating the trigger circuit is printed on the trigger circuit. The insulating layer is coated with an adhesive layer that can be pasted on the internal components of the POS machine. Once the trigger circuit is torn after the PET film layer is torn, the alarm device is triggered to protect the internal components of the POS machine.

[0006] The above method has currently become a relatively common detection means in the industry. However, this method also has some drawbacks. For example, since PET itself is easily torn, when the device drops, vibrates, etc. during inevitable daily use, it will cause slight deformation of the liquid crystal screen. The accumulated deformation and vibration are likely to cause the easily torn PET to break even without being illegally attacked, resulting in false alarms and other situations.

[0007] Therefore, the present utility model provides an anti-tear PET film that can avoid easily torn PET and at the same time avoid abnormal fracture of PET caused by dropping or vibration. Summary of the Utility Model

[0008] In view of this, the purpose of the present utility model is to provide an anti-tear PET film that can avoid easily torn PET and at the same time avoid abnormal fracture of PET caused by dropping or vibration.

[0009] The present utility model is implemented as follows:

[0010] An anti-tear PET film includes an adhesive layer and a first UV layer. The first UV layer is adhered with a release paper or a release film through the adhesive layer;

[0011] A first circuit layer, a substrate layer, and a via hole. The first circuit layer is provided at the head end of the front surface of the substrate layer, and the first circuit layer is attached to the first UV layer; and the tail end of the first circuit layer close to the center of the substrate layer overlaps and is attached to the via hole. The via hole is opened on the substrate layer and penetrates the substrate layer;

[0012] A second circuit layer and a second UV layer. The head end of the second circuit layer overlaps and is attached to the back surface of the via hole, and the second circuit layer is provided on the back surface of the tail end of the substrate layer. The second UV layer is attached to the back surface of the second circuit layer;

[0013] A filling block. The filling block fills the via hole and connects the first circuit layer and the second circuit layer.

[0014] As a further improvement, the filling block is made of carbon powder and silver paste.

[0015] As a further improvement, the substrate layer is a transparent PET film.

[0016] As a further improvement, the first UV layer can also be attached to the back of the liquid crystal layer through the adhesive layer.

[0017] As a further improvement, the thickness of the adhesive layer is 50μm.

[0018] As a further improvement, the first UV layer is formed by laminating a third UV layer and a fourth UV layer through a first silver paste layer.

[0019] As a further improvement, the thickness of the third UV layer is 30 μm.

[0020] As a further improvement, the thickness of the fourth UV layer is 12 μm.

[0021] As a further improvement, the thickness of the substrate layer is 0.05 mm.

[0022] As a further improvement, the thickness of the second UV layer is 30 μm.

[0023] The beneficial effects of the present utility model are as follows:

[0024] ① The present utility model adopts a first circuit layer and a second circuit layer, which are distributed on the front and back ends of the substrate layer, staggered, and then connected by filling blocks. As a result, the front end of the anti-tear PET film can still be adhered to the liquid crystal layer through the adhesive layer, while the tail end is kept at a distance from the liquid crystal layer. That is to say, half of the anti-tear PET film is designed to be easily torn, and the other half is designed not to be easily torn.

[0025] The easily torn design enables when the liquid crystal is illegally lifted, opened or removed, due to the easily torn design, the adhesive layer will lift the first circuit layer because the liquid crystal is lifted, so that the security chip detects this abnormality and triggers a security alarm.

[0026] For the non-easily torn design, if there are fluctuations in the liquid crystal layer, since the first circuit layer and the second circuit layer are connected by filling blocks, the circuit layer at the bending part will not be affected. Even under the influence of shear forces on both sides, there will be no fracture phenomenon, effectively avoiding the influence of accumulated deformation and vibration on the anti-tear PET film over time, thereby improving the reliability of the device. Description of the Drawings

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required for the embodiments. It should be understood that the following drawings only show some embodiments of the present utility model, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.

[0028] Figure 1 It is a schematic structural diagram of a traditional anti-tear PET film provided by an embodiment of the present utility model.

[0029] Figure 2 It is a schematic structural diagram of an anti-tear PET film provided by an embodiment of the present utility model when adhered to a liquid crystal.

[0030] Figure 3This is a stacked schematic diagram of a tear-proof PET film in an unused state provided by an embodiment of the present utility model. Detailed implementation manners

[0031] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Apparently, the described embodiments are some but not all of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts fall within the protection scope of the present utility model. Therefore, the detailed description of the embodiments of the present utility model provided in the accompanying drawings is not intended to limit the scope of the claimed present utility model, but merely represents selected embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts fall within the protection scope of the present utility model.

[0032] In the description of the present utility model, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, "a plurality of" means two or more unless otherwise specifically defined.

[0033] Referring to Figures 1 - 3 As shown, this embodiment provides a specific implementation manner regarding a tear-proof PET film, including an adhesive layer 2 and a first UV layer 3. The first UV layer 3 is adhered with a release paper or a release film 7 through the adhesive layer 2;

[0034] A first circuit layer 4, a substrate layer 5, and a via hole 6. The first circuit layer 4 is provided at the head end of the front surface of the substrate layer 5, and the first circuit layer 4 is attached to the first UV layer 3; and the tail end of the first circuit layer 4 close to the center of the substrate layer 5 overlaps and is attached to the via hole 6. The via hole 6 is formed in the substrate layer 5 and penetrates through the substrate layer 5;

[0035] A second circuit layer 4-1 and a second UV layer 5-1. The head end of the second circuit layer 4-1 overlaps and is attached to the back surface of the via hole 6, and the second circuit layer 4-1 is provided on the back surface of the tail end of the substrate layer 5. The second UV layer 5-1 is attached to the back surface of the second circuit layer 4-1.

[0036] A filling block fills the via hole 6 and connects the first circuit layer 4 and the second circuit layer 4-1.

[0037] In this embodiment, through the above structural design, compared with the traditional design with only one layer of circuit layer, only the anti-tearing structure is designed. As for the traditional anti-tearing PET film, as Figure 1 shown, in this case, the first circuit layer 4 and the second circuit layer 4-1 are distributed at the front and back ends of the substrate layer 5 respectively, and are staggered. Then, they are connected by filling blocks, so that the front end of the anti-tearing PET film can also be adhered to the liquid crystal layer 1 through the adhesive layer 2, while the tail end keeps a distance from the liquid crystal layer 1. That is to say, half of the anti-tearing PET film is designed to be easily torn; the other half is designed not to be easily torn.

[0038] During specific use, the anti-tearing PET film can tear off the release paper or release film 7, and let the first UV layer 3 be pasted to the back of the liquid crystal layer 1 through the adhesive layer 2. The easily torn design makes it so that when the liquid crystal 1 is illegally lifted, opened or removed, because of the easily torn design, when the liquid crystal is lifted, the adhesive layer 2 will lift the first circuit layer 4, so that the security chip detects this abnormality and triggers a security alarm.

[0039] For the non-easily torn design, if there are fluctuations in the liquid crystal layer, since the first circuit layer 4 and the second circuit layer 4-1 are connected by filling blocks, the circuit layer at the bending part will not be affected even if it is affected by the shear force on both sides, and there will be no fracture phenomenon, effectively avoiding the influence of accumulated deformation and vibration on the anti-tearing PET film.

[0040] In some embodiments, the filling block is made of carbon powder and silver paste, to prevent the circuit at the bending part from breaking due to the pulling force of the adhesive layer 2.

[0041] In some embodiments, the substrate layer 5 is a transparent PET film, which is not easily broken due to bending, and is suitable for environments with a long storage time and requirements for waterproof, oil-proof and anti-tearing.

[0042] Furthermore, the thickness of the substrate layer 5 is 0.05 mm.

[0043] In some embodiments, the thickness of the adhesive layer 2 is 50 μm. With a suitable thickness, it has adhesiveness and can adhere to the liquid crystal.

[0044] In some embodiments, the first UV layer 3 is formed by laminating a third UV layer 301 and a fourth UV layer 302 through a first silver paste layer 303, to enhance the durability and aesthetics of the material; to reinforce the surface of the first circuit layer 4, which can resist pollution, absorb ultraviolet rays, enhance abrasion resistance, impact resistance, fire resistance and flame retardancy, and delay the aging of the product, and is also easy to clean.

[0045] Among them, the thickness of the third UV layer 301 is 30 μm.

[0046] Among them, the thickness of the fourth UV layer 302 is 12 μm.

[0047] The thickness of the third UV layer 301 is greater than that of the fourth UV layer 302 because the third UV layer 301 directly releases the liquid crystal layer through the adhesive layer 2, and it is necessary to enhance the durability and aesthetics of the material. The fourth UV layer 302 only contacts the first circuit layer 4. Reducing the thickness can also protect the first circuit layer 4 and reduce the overall thickness of the anti-tear PET film, which is more appropriate.

[0048] In some embodiments, the thickness of the second UV layer 5-1 is 30 μm. The second UV layer 5-1 is directly on the outside to enhance the durability and aesthetics of the material; it strengthens the surface of the first circuit layer 4, can resist pollution, absorb ultraviolet rays, enhance wear resistance, impact resistance, fire resistance and flame retardancy, and delay the aging of the product, while being easy to clean.

[0049] In some embodiments, positive silver dots 5-2 and positive carbon paste 5-3 can also be added to the back surface of the second UV layer 5-1 to mark words and play a role of identification.

[0050] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A tear-resistant PET film sheet, characterized in that, It includes an adhesive layer (2) and a first UV layer (3), and a release paper or a release film (7) is adhered to the first UV layer (3) through the adhesive layer (2); A first circuit layer (4), a substrate layer (5), and a via hole (6). The first circuit layer (4) is provided at the head end of the front surface of the substrate layer (5), and the first circuit layer (4) is attached to the first UV layer (3); and the tail end of the first circuit layer (4) close to the center of the substrate layer (5) overlaps and is attached to the via hole (6). The via hole (6) is formed in the substrate layer (5) and penetrates through the substrate layer (5); A second circuit layer (4-1) and a second UV layer (5-1). The head end of the second circuit layer (4-1) overlaps and is attached to the back surface of the via hole (6), and the second circuit layer (4-1) is provided on the back surface of the tail end of the substrate layer (5). The second UV layer (5-1) is attached to the back surface of the second circuit layer (4-1); A filling block, which is filled in the via hole (6) to connect the first circuit layer (4) and the second circuit layer (4-1).

2. The anti-tear PET film sheet according to claim 1, wherein The filling block is made of carbon powder and silver paste.

3. The anti-tearing PET film sheet according to claim 2, wherein The substrate layer (5) is a transparent PET film.

4. The anti-tear PET film sheet according to claim 1, wherein The first UV layer (3) can also be adhered to the back of the liquid crystal layer (1) through the adhesive layer (2).

5. The anti-tearing PET film sheet according to claim 4, wherein, The thickness of the adhesive layer (2) is 50 μm.

6. The anti-tearing PET film sheet according to claim 1, wherein The first UV layer (3) is formed by laminating a third UV layer (301) and a fourth UV layer (302) through a first silver paste layer (303).

7. The anti-tearing PET film sheet according to claim 6, wherein The thickness of the third UV layer (301) is 30 μm.

8. The anti-tear PET film sheet according to claim 6, wherein The thickness of the fourth UV layer (302) is 12 μm.

9. The anti-tearing PET film sheet according to claim 6, wherein, The thickness of the substrate layer (5) is 0.05 mm.

10. The anti-tear PET film sheet according to claim 6, characterized in that, The thickness of the second UV layer (5-1) is 30 μm.

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