Reflective film for assembly sheet string with high-temperature-resistant anti-puncture structure

Abstract

The utility model discloses a reflective film for an assembly sheet string of a high-temperature-resistant anti-puncture structure. The reflective film comprises a gap film main body, the gap film main body comprises a protective layer, an adhesive layer, a bonding layer, a base material layer, a reflective layer and a prism structure; a bonding layer is arranged at the bottom end of the base material layer, a plurality of side-by-side prism structures are bonded to the top end of the base material layer through an adhesive layer, a reflective layer is arranged on the surface of each prism structure, and a protective layer is arranged on the surface of each reflective layer. According to the utility model, through the arrangement of the protective layer and the reflective layer, when the gap film main body is used, a layer of protective structure can be covered on the prismatic structure of the aluminum layer on the surface layer of the gap film, so that the adhesive film can be effectively prevented from being punctured by the reflective film; and the protective layer has high ultraviolet resistance and weather resistance as well as 92% of light transmittance and optical characteristics, and can reflect light rays incident to the surface of the gap film to the greatest extent, so that the protection effect is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of gap film, in particular to a reflective film for a component sheet string with a high temperature resistant and puncture resistant structure. Background Art

[0002] Gap film is a thin film material with special functions, which is usually used in various industries and application scenarios to meet specific needs. This film has the characteristics of high temperature resistance and puncture resistance, so it is particularly suitable for those occasions that need to withstand high temperature environments or prevent puncture from sharp objects. Specifically, the gap film may be made of a variety of high temperature resistant and high strength materials that can maintain stability at high temperatures and have sufficient toughness to resist puncture. This film may also have other functions, such as chemical corrosion resistance, flame retardancy, etc., to enhance its applicability and safety in complex working environments. The application range of gap films is wide, including but not limited to industrial production lines, automotive parts, electronic equipment and other fields;

[0003] However, there are still some problems in the use of traditional gap films. The base material layer of the traditional gap film is PET material, but the traditional PET material has poor high temperature resistance when used, and there is no protective layer on the prism structure of the reflective layer of the traditional gap film. This causes the prism structure (directional metal reflective film layer) of the reflective layer on the surface of the gap film to puncture the film when it is in contact with the film surface for a long time, thereby causing leakage of the component during actual use. Therefore, a reflective film for component string with a high temperature resistant and puncture-proof structure is needed to solve the above problems. Utility Model Content

[0004] The utility model aims to provide a reflective film for component sheet strings with a high temperature resistant and puncture-proof structure, so as to solve the defects that the PET layer of the existing gap film is not resistant to high temperature and the prism structure of the reflective layer of the existing gap film is easy to puncture the film and easily cause leakage after contacting the film surface.

[0005] In order to solve the above technical problems, the utility model provides the following technical solutions: a reflective film for a component sheet string with a high temperature resistant and puncture-proof structure, comprising a gap film body; the gap film body comprises a protective layer, a glue layer, an adhesive layer, a substrate layer, a reflective layer and a prism structure; an adhesive layer is provided at the bottom end of the substrate layer, and a plurality of side-by-side prism structures are bonded to the top end of the substrate layer through the glue layer, a reflective layer is provided on the surface of the prism structure, and a protective layer is provided on the surface of the reflective layer.

[0006] Preferably, the material of the protective layer is PMMA material, and the thickness of the protective layer is 3-5 μm.

[0007] Preferably, the reflective layer is made of aluminum metal, and the thickness of the reflective layer is 1.5-2.5 μm.

[0008] Preferably, the prism structure comprises a first inclined plane and a second inclined plane opposite to each other, and an angle is formed between the first inclined plane and the second inclined plane, and the angle ranges from 130 to 140 degrees.

[0009] Preferably, the material of the adhesive layer is UV adhesive layer, and the thickness of the adhesive layer is 13-17 μm.

[0010] Preferably, the substrate layer is made of PI material, and the thickness of the substrate layer is 50-70 μm.

[0011] Preferably, the adhesive layer is made of EVA material, and the thickness of the adhesive layer is 35-45 μm.

[0012] Preferably, the total thickness of the gap film body is 102.5-139.5 μm.

[0013] The utility model provides a reflective film for component string with a high temperature resistant and puncture resistant structure, which has the advantages of:

[0014] By setting the protective layer and the reflective layer, when the gap film body is in use, a protective structure can be covered on the prismatic structure of the surface aluminum layer of the gap film, thereby effectively preventing the reflective film from piercing the adhesive film. The protective layer has high UV resistance and weather resistance, as well as a light transmittance and optical properties of up to 92%, which can reflect the light incident on the surface of the gap film to the greatest extent, thereby improving the protective effect.

[0015] By replacing the substrate layer with a high temperature resistant material, the overall high temperature resistance effect of the substrate layer is improved, so that the substrate layer can be used normally even when the temperature is high, thereby improving the high temperature resistance effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a front view structural schematic diagram of the utility model.

[0017] In the figure: 1, gap film body; 101, protective layer; 102, glue layer; 103, adhesive layer; 104, base material layer; 105, reflective layer; 106, prism structure; 106a, first inclined surface; 106b, second inclined surface. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0019] The utility model embodiment provides a reflective film for a component string with a high temperature resistant and puncture resistant structure, such as Figure 1 As shown, the gap film body 1 includes a protective layer 101, a glue layer 102, an adhesive layer 103, a substrate layer 104, a reflective layer 105 and a prism structure 106. The bottom end of the substrate layer 104 is provided with an adhesive layer 103, and the top of the substrate layer 104 is adhered with a plurality of prism structures 106 arranged side by side through the glue layer 102. The surface of the prism structure 106 is provided with a reflective layer 105, and the surface of the reflective layer 105 is provided with a protective layer 101. The material of the protective layer 101 is PMMA material, and the thickness of the protective layer 101 is 3-5 μm. The material of the reflective layer 105 is aluminum metal, and the thickness of the reflective layer 105 is The prism structure 106 comprises a first inclined plane 106a and a second inclined plane 106b relative to each other, and an angle is formed between the first inclined plane 106a and the second inclined plane 106b, and the angle range is 130° to 140°. The material of the glue layer 102 is a UV glue layer, and the thickness of the glue layer 102 is 13 to 17 μm. The material of the substrate layer 104 is a PI material, and the thickness of the substrate layer 104 is 50 to 70 μm. The material of the adhesive layer 103 is an EVA material, and the thickness of the adhesive layer 103 is 35 to 45 μm. The total thickness of the gap film body 1 is 102.5 to 139.5 μm.

[0020] Specifically, in this embodiment: the traditional substrate layer 104 is a PET substrate that cannot withstand high temperatures <150°C, and the material tolerance of the component will be reduced during the lamination process or when hot spot failure occurs. After the substrate layer 104 is replaced with a high-temperature resistant and flexible polyimide film PI film, the high-temperature resistance of the material will be greatly improved to >500°C, thereby increasing the service life of the component. The thickness of the substrate layer 104 is consistent with the traditional PET layer, which is 60μm.

[0021] PI film is generally made of pyromellitic dianhydride (PMDA) and diaminodiphenyl ether (ODA) in a very strong solvent dimethylacetamide (DMAC) through polycondensation and salivation to form a film, and then imidization. Since the main chain of polyimide PI contains a type of polymer containing an imide ring (-CO-NH-CO-), the molecular structure is very stable. It is the most heat-resistant variety among the currently industrialized polymer materials, with high thermal stability >500°C, low thermal expansion coefficient, and the highest flame retardant grade UL-94, good electrical insulation properties, mechanical properties, chemical stability, aging resistance, radiation resistance, low dielectric loss, and long-term use temperature range of -200~300℃.

[0022] The adhesive layer 102 is EVA. EVA is an ethylene-vinyl acetate copolymer and is a thermosetting adhesive film. It is formed by adding a variety of additives such as cross-linking agents, coupling agents, and anti-ultraviolet agents to EVA particles, and then melt-processing and molding. Due to its good processing performance, sufficient supply and low cost, and its superiority in adhesion, durability, and optical properties, it is increasingly widely used in current components and various optical products. If the VA content in EVA is low, the heat resistance is good, but the polarity is poor, resulting in poor adhesion and low-temperature flexibility of the film; if the VA content is high, it has better low-temperature flexibility and adhesion. The larger the melt index, the better the EVA fluidity, the better the paving performance, the more physical bonding points, and the greater the peel strength; but when the melt index is large to a certain extent, EVA will have a lower degree of polymerization, resulting in a decrease in its own strength and a decrease in adhesion. In order to maintain good adhesion, a resin with a VA content of 28-33% and a MI of 10-400 is generally selected.

[0023] The prismatic structure of the aluminum powder reflective layer on the surface of the gap film is easy to puncture the film when it is in contact with the POE / EVA film for a long time, and it is easy to cause leakage after contacting the battery cell, resulting in component failure. By covering the surface of the reflective layer with a highly transparent and rigid protective layer 1011PMMA, PMMA is a rigid and highly transparent material. A protective structure is covered on the prismatic structure of the aluminum layer on the surface of the gap film, which can effectively prevent the reflective film from piercing the film, thereby effectively avoiding the problem of the gap film piercing the film.

[0024] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A reflective film for a component string with a high temperature resistant and puncture resistant structure, comprising a gap film body (1); Features: The gap film body (1) comprises a protective layer (101), a glue layer (102), an adhesive layer (103), a substrate layer (104), a reflective layer (105) and a prism structure (106); The bottom end of the substrate layer (104) is provided with an adhesive layer (103), the top end of the substrate layer (104) is adhered with a plurality of parallel prism structures (106) via an adhesive layer (102), the surface of the prism structure (106) is provided with a reflective layer (105), and the surface of the reflective layer (105) is provided with a protective layer (101).

2. The reflective film for component string with high temperature resistant and puncture resistant structure according to claim 1, characterized in that: The material of the protective layer (101) is PMMA material, and the thickness of the protective layer (101) is 3-5 μm.

3. The reflective film for component string with high temperature resistant and puncture resistant structure according to claim 1, characterized in that: The reflective layer (105) is made of aluminum metal, and the thickness of the reflective layer (105) is 1.5-2.5 μm.

4. The reflective film for component string with high temperature resistant and puncture resistant structure according to claim 1, characterized in that: The prism structure (106) comprises a first inclined surface (106a) and a second inclined surface (106b) which are opposite to each other, and an angle is formed between the first inclined surface (106a) and the second inclined surface (106b), and the angle range is 130° to 140°.

5. The reflective film for component string with high temperature resistant and puncture resistant structure according to claim 1, characterized in that: The material of the adhesive layer (102) is a UV adhesive layer, and the thickness of the adhesive layer (102) is 13-17 μm.

6. The reflective film for component string with high temperature resistant and puncture resistant structure according to claim 1, characterized in that: The material of the substrate layer (104) is PI material, and the thickness of the substrate layer (104) is 50-70 μm.

7. The reflective film for component string with high temperature resistant and puncture resistant structure according to claim 1, characterized in that: The material of the adhesive layer (103) is EVA material, and the thickness of the adhesive layer (103) is 35-45 μm.

8. The reflective film for component string with high temperature resistant and puncture resistant structure according to claim 1, characterized in that: The total thickness of the gap film body (1) is 102.5-139.5 μm.

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