Touch film, vehicle glass and vehicle glass assembly

Abstract

The utility model relates to the technical field of touch films, in particular to a touch film, vehicle glass and a vehicle glass assembly. The touch film comprises a substrate layer which is provided with a first surface and a second surface in the thickness direction of the substrate layer; the conductive layer is arranged on the first surface and / or the second surface; the protective layer is arranged on one side, away from the substrate layer, of the conductive layer; the edge portions of the conductive layer are both shrunk inwards relative to the corresponding edge portions of the substrate layer. According to the touch film provided by the utility model, the edge part of the conductive layer is inwards retracted relative to the substrate layer, and then the protective layer is arranged on the surface of the conductive layer, so that insulating oil is replaced by the protective layer for protection. After the protective layer is arranged, the influence of the external environment on the conductive layer is directly isolated, so that the conductive performance of the touch film is still good after the touch film is stored for a long time or placed in a high-temperature environment.

Description

Technical Field

[0001] The utility model relates to the technical field of touch films, and particularly relates to a touch film, a vehicle glass and a vehicle glass assembly. Background Art

[0002] The existing touch film is coated with a conductive material on the whole surface. After the image etching is completed, insulating oil is printed on the surface of the conductive layer for protection.

[0003] However, after the insulating oil is stored at room temperature for one month, due to the denaturation of the insulating oil, during film lamination, the insulating oil will show local cracking at high temperature (132 °C) and high pressure (1.1 MPa), thus damaging the conductive material on the surface of the touch film and causing the touch film to fail. Moreover, after the touch film is laminated with PVB and placed in a high temperature environment (90 °C) for a long time (2000H), the water vapor in the environment and the water vapor or other substances that may exist in the laminated glass slowly erode into the glass and corrode the conductive material on the touch film, making the touch film lose its conductivity. Summary of the Utility Model

[0004] The technical problem to be solved by the utility model is to provide a touch film that overcomes the defect that the existing touch film loses its conductivity after being in a high temperature environment or placed for a long time.

[0005] To solve the above technical problem, the technical solution adopted by the utility model is: a touch film, comprising: a base layer having a first surface and a second surface in its thickness direction;

[0006] A conductive layer disposed on the first surface and / or the second surface;

[0007] A protective layer disposed on the side of the conductive layer away from the base layer;

[0008] The edges of the conductive layer are all recessed relative to the corresponding edges of the base layer.

[0009] Further, the distance from the edge of the conductive layer to the corresponding edge of the base layer is greater than or equal to 3 mm.

[0010] Further, the protective layer is a transparent film.

[0011] Further, the transmittance of the protective layer is greater than 85%, and / or, the haze of the protective layer is less than 5.0%.

[0012] Further, the protective layer is bonded to the conductive layer through an optical adhesive.

[0013] Further, the edges of the protective layer are flush with the edges of the base layer.

[0014] Further, the thickness of the base layer is 80-120 μm, the thickness of the conductive layer is 10-15 μm, and the thickness of the protective layer is 75-125 μm.

[0015] The present utility model further provides a vehicle glass, including an outer glass plate, an inner glass plate, and the touch film as described above, and the touch film is clamped between the outer glass plate and the inner glass plate.

[0016] Further, a supplementary layer is further included. At least one side of the touch film is retracted relative to the corresponding side of the outer glass plate and / or the inner glass plate to form a vacant area, and the supplementary layer fills the vacant area.

[0017] The present utility model further provides a vehicle glass assembly using the vehicle glass as described above.

[0018] The beneficial effect of the present utility model is that: for the touch film provided by the present utility model, the edge of the conductive layer is retracted relative to the base layer, and then a protective layer is provided on the surface of the conductive layer, and the protective layer is used for protection instead of insulating oil. After the protective layer is provided, it directly isolates the influence of the external environment on the conductive layer, so that the touch film can still have good conductivity after long-term storage or placement in a high-temperature environment. Description of the Drawings

[0019] Figure 1 It is a schematic structural diagram of a touch film in an embodiment of the present utility model;

[0020] Figure 2 It is a schematic structural diagram of the touch film after film clamping in an embodiment of the present utility model;

[0021] Figure 3 It is a schematic structural diagram of a vehicle glass in an embodiment of the present utility model.

[0022] Label Description:

[0023] 1. Touch film; 11. Base layer; 12. Conductive layer; 13. Protective layer;

[0024] 2. Vehicle glass; 21. Outer glass plate; 22. Inner glass plate; 23. Adhesive layer; 24. Supplementary layer. Detailed Embodiments

[0025] To describe the technical content, achieved purpose, and effects of the present utility model in detail, the following is described in conjunction with the embodiments and with reference to the drawings.

[0026] For the existing touch film, insulating oil is directly printed on the surface of the conductive layer for protection, and it will lose conductivity after long-term storage or long-term placement in a high-temperature environment.

[0027] Based on this, please refer to Figures 1 to 3 , a touch film 1, comprising: a base layer 11 having a first surface and a second surface in its thickness direction; a conductive layer 12 disposed on the first surface and / or the second surface; a protective layer 13 disposed on a side of the conductive layer 12 away from the base layer 11; and the edges of the conductive layer 12 are all recessed relative to the corresponding edges of the base layer 11.

[0028] It can be understood that the edges of the conductive layer 12 are recessed relative to the base layer 11, and then the protective layer 13 is disposed on the surface of the conductive layer 12 to protect it by replacing the insulating oil. After the protective layer 13 is disposed, it directly isolates the influence of the external environment on the conductive layer 12, so that the touch film 1 can still have good electrical conductivity after being stored for a long time or placed in a high-temperature environment. Specifically, the base layer 11 can be made of flexible materials such as PET.

[0029] In some embodiments, the distance from the edge of the conductive layer 12 to the corresponding edge of the base layer 11 is greater than or equal to 3 mm. Preferably, the distance from the edge of the conductive layer 12 to the corresponding edge of the base layer 11 is 3-10 mm. Preferably, the distance from the edge of the conductive layer 12 to the corresponding edge of the base layer 11 is 3-5 mm or 5-10 mm. More preferably, the distance from the edge of the conductive layer 12 to the corresponding edge of the base layer 11 is 3 mm, 3.5 mm, 4 mm, 4.5 mm, 5 mm, 5.5 mm, 6 mm, 6.5 mm, 7 mm, 7.5 mm, 8 mm, 8.5 mm, 9 mm, 9.5 mm or 10 mm. Those skilled in the art can adjust the recessed distance according to the subsequent application type of the touch film, and no specific limitation is made.

[0030] In some embodiments, the protective layer 13 is a transparent film. The protective layer 13 is made of a transparent film, which isolates the influence of the external environment on the conductive layer 12 after being attached to the conductive layer 12 and continuously plays a protective role. Preferably, the protective layer 13 is a PET film. The PET film is a flexible material, which can not only be well attached to the surface of the conductive layer 12 to protect the conductive layer 12, but also has good light transmittance and heat resistance, and can withstand a long-term high-temperature environment.

[0031] In some embodiments, the transmittance of the protective layer 13 is greater than 85%, and / or the haze of the protective layer 13 is less than 5.0%. After the transmittance and haze of the protective layer 13 are defined, the light transmittance and appearance performance of the touch film 1 can be ensured to be good, so as to ensure that the effect of the product after the subsequent film lamination application of the touch film 1 is not affected. Preferably, the transmittance of the protective layer 13 is greater than 95%, and / or the haze of the protective layer 13 is less than 0.8%.

[0032] In some embodiments, the protective layer 13 is bonded to the conductive layer 12 by an optical adhesive. Using an optical adhesive can ensure the overall light transmittance and appearance performance of the touch film 1. Preferably, the optical adhesive is an OCA adhesive, which not only has good optical properties but also has good high-temperature resistance and can be used for a long time in a high-temperature environment. Those skilled in the art can select a suitable optical adhesive according to the requirements for optical properties and high-temperature resistance.

[0033] In some embodiments, such as Figure 1 and Figure 2 shown, the edges of the protective layer 13 are flush with the edges of the base layer 11. After the edges of the protective layer 13 are flush with the edges of the base layer 11, under the vacuum effect during the film sandwiching process, the protective layer 13 fits with the base layer 11, so that the conductive layer 12 is accommodated in the sealed space formed by the protective layer 13 and the base layer 11, further enhancing the protection effect.

[0034] In some embodiments, the thickness of the base layer 11 is 80 - 120 μm, the thickness of the conductive layer 12 is 10 - 15 μm, and the thickness of the protective layer 13 is 75 - 125 μm. Preferably, the thickness of the base layer 11 is 80 μm, 85 μm, 90 μm, 95 μm, 100 μm, 105 μm, 110 μm, 115 μm or 120 μm; the thickness of the conductive layer 12 is 10 μm, 10.5 μm, 11 μm, 11.5 μm, 12 μm, 12.25 μm, 12.5 μm, 12.75 μm, 13 μm, 13.5 μm, 14 μm, 14.5 μm or 15 μm, and the thickness of the protective layer 13 is 75 μm, 80 μm, 85 μm, 90 μm, 95 μm, 100 μm, 105 μm, 110 μm, 115 μm, 120 μm or 125 μm. More preferably, the thickness of the base layer 11 is 100 μm, the thickness of the conductive layer 12 is 12.5 μm, and the thickness of the protective layer 13 is 75 μm.

[0035] The present utility model also provides a vehicle glass 2, which includes an outer glass plate 21, an inner glass plate 22 and the touch film 1 as described above arbitrarily, and the touch film 1 is clamped between the outer glass plate 21 and the inner glass plate 22.

[0036] In some embodiments, the vehicle glass 2 further includes an adhesive layer 23 disposed between the touch film 1 and the outer glass plate 21 and / or the inner glass plate 22. An adhesive layer 23 is disposed between the touch film 1 and the outer glass plate 21 or between the touch film 1 and the inner glass plate 22, and the adhesive layer 23 makes the bonding between the touch film 1 and the outer glass plate 21 and the inner glass plate 22 more firm. Specifically, the adhesive layer 23 can be at least one of polyvinyl butyral (PVB), ethylene-vinyl acetate copolymer (EVA), polyurethane (PU), and polyolefin elastomer (POE). Specifically, those skilled in the art can adjust the material of the adhesive layer 23 according to the actual needs of the vehicle glass 2, and no specific limitation is made.

[0037] In some embodiments, as Figure 3 shown, it further includes a supplementary layer 24. At least one side portion of the touch film 1 is retracted relative to the corresponding side portions of the outer glass plate 21 and / or the inner glass plate 22 to form a vacant area, and the supplementary layer 24 fills the vacant area. When the touch film 1 is clamped, the side portions of the touch film 1 are retracted relative to the side portions of the outer glass plate 21 and / or the inner glass plate 22 to form a vacant area. The supplementary layer 24 is filled in the vacant area to make the interlayer between the outer glass plate 21 and the inner glass plate 22 flush, ensuring uniform clamping film effect and stress conduction. Specifically, the vehicle glass 2 bonds the touch film 1 to the outer glass plate 21 and the inner glass plate 22 through the adhesive layer 23, and the side portions of the adhesive layer 23 are flush with the corresponding side portions of the outer glass plate 21 and / or the inner glass plate 22. The side portions of the touch film 1 are retracted relative to the side portions of the outer glass plate 21 and / or the inner glass plate 22, which is equivalent to that one side portion of the touch film 1 is retracted relative to the corresponding side portions of the adhesive layers 23 on both sides of the touch film 1, and the vacant area is formed between the corresponding side portions of the adhesive layer 23. The supplementary layer 24 is filled in the vacant area to make the interlayer between the outer glass plate 21 and the inner glass plate 22 flush and avoid the generation of voids inside the vehicle glass 2.

[0038] The present utility model also provides a vehicle glass assembly adopting the vehicle glass 2 described above. Please refer to Figures 1 to 3 FIG. 1, Embodiment 1 of the present utility model is: a touch film 1, including: a base layer 11 having a first surface and a second surface in its thickness direction; a conductive layer 12 disposed on the first surface and the second surface; a protective layer 13 disposed on the side of the conductive layer 12 away from the base layer 11; the side portions of the conductive layer 12 are all retracted 3 mm relative to the corresponding side portions of the base layer 11. Preferably, the material of the protective layer 13 is a PET film, the material of the base layer 11 is PET, and the material of the conductive layer 12 is nano silver. The protective layer 13 is bonded to the conductive layer 12 through an OCA adhesive. The thickness of the base layer 11 is 100 μm, the thickness of the conductive layer 12 is 12.5 μm, and the thickness of the protective layer 13 is 75 μm.

[0039] In this embodiment, the transmittance of the protective layer 13 is > 87%, and the haze of the protective layer 13 is < 3.1%.

[0040] Comparative Example 1

[0041] It includes a base layer having a first surface and a second surface in its thickness direction; a conductive layer is provided on the first surface and the second surface; an insulating oil is printed on the surface of the conductive layer. The thickness of the base layer is 100 μm, and the thickness of the conductive layer is 12.5 μm.

[0042] The touch film of Example 1 was subjected to a test of being placed at a high temperature (110 °C) for 2000 hours, and Comparative Example 1 was subjected to a test of being placed at a high temperature (90 °C) for 2000 hours. The specific test results are shown in Table 1 and Table 2.

[0043] Table 1 Conductive performance of the touch film of Example 1 after high-temperature experiment

[0044]

[0045]

[0046] Table 2 Conductive performance of the touch film of Comparative Example 1 after high-temperature experiment

[0047]

[0048]

[0049] Meanwhile, after the experiment, the touch films of Example 1 and Comparative Example 1 were observed with the naked eye, and it was found that there was visible yellowing in the range of 2.5 - 3 mm from the edge to the inside of the touch film of Comparative Example 1; there was visible yellowing in the range of 1 mm from the edge of the touch film of Example 1.

[0050] As can be seen from Table 1 and Table 2, after the touch film of Comparative Example 1 was placed in an environment of 90 °C, not only was the edge area yellowed in a large range, but also the conductive performance of the yellowed area disappeared, that is, the edge part of the touch film of Comparative Example 1 failed after being placed at a high temperature. After the touch film provided by the present invention was placed at a high temperature of 110 °C for 2000 hours, not only was the yellowing range significantly reduced compared with Comparative Example 1, but also the conductive performance of the edge part remained good, which fully demonstrated the excellent effect of the touch film provided by the present invention. Moreover, the touch film provided by the present invention can pass the placement experiment at a higher temperature, which fully shows that its subsequent application is not limited to the positions such as the sunroof or side window of a conventional vehicle, and has stronger adaptability and use value.

[0051] The above are only embodiments of the present utility model, and thus do not limit the patent scope of the present utility model. Any equivalent transformation made by using the content of the specification and drawings of the present utility model, or directly or indirectly applied in related technical fields, shall similarly be included within the patent protection scope of the present utility model.

Claims

1. A touch film, characterized in that, Comprising: A base layer having a first surface and a second surface in its thickness direction; A conductive layer disposed on the first surface and / or the second surface; A protective layer disposed on a side of the conductive layer away from the base layer; Edges of the conductive layer are all recessed relative to corresponding edges of the base layer.

2. The touch film according to claim 1, wherein: The distance from the edge of the conductive layer to the corresponding edge of the base layer is ≥ 3 mm.

3. The touch film according to claim 1, wherein: The protective layer is a transparent film.

4. The touch film according to claim 1, wherein: The transmittance of the protective layer is greater than 85%, and / or, the haze of the protective layer is less than 5.0%.

5. The touch film according to claim 1, wherein: The protective layer is bonded to the conductive layer by an optical adhesive.

6. The touch film according to claim 1, wherein: Edges of the protective layer are flush with edges of the base layer.

7. The touch film according to claim 1, characterized in that: The thickness of the base layer is 80 - 120 μm, the thickness of the conductive layer is 10 - 15 μm, and the thickness of the protective layer is 75 - 125 μm.

8. A vehicle glass, characterized in that: Comprising an outer sheet glass plate, an inner sheet glass plate, and a touch film according to any one of claims 1 - 7, the touch film being clamped between the outer sheet glass plate and the inner sheet glass plate.

9. The vehicle glass according to claim 8, wherein: Further comprising a supplementary layer, at least one edge of the touch film is recessed relative to corresponding edges of the outer sheet glass plate and / or the inner sheet glass plate to form a vacant area, and the supplementary layer fills the vacant area.

10. A vehicle glass assembly, characterized in that: Using a vehicle glass according to any one of claims 8 - 9.

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