Conductive pet film material for transparent antenna and method for manufacturing the same

Abstract

The application relates to the technical field of PET film, and discloses a conductive PET film material for a transparent antenna and a preparation method thereof, wherein the conductive PET film material comprises, from top to bottom, a copper mesh and a PET film; the PET film comprises the following components by weight: 80-90 parts of PET resin, 1-2 parts of a compatilizer, 8-14 parts of a flame retardant, 2-4 parts of an ultraviolet resistance agent and 0.8-1 part of a heat stabilizer; the flame retardant is composed of an organic phosphorus flame retardant and 4-amino-5-imidazole formamide. Through the technical scheme, the problems of poor flame retardance and ultraviolet resistance of the conductive PET film material in the related art are solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of PET film, in particular to a conductive PET film material for transparent antenna and a preparation method thereof. BACKGROUND

[0002] Transparent conductive film has been widely used in solar cells, flat panel displays, organic light emitting diodes, low-emissivity glass, special functional window coating, transparent thin film transistor and flexible electronic devices due to its excellent optical and electrical properties. In recent years, with the development of science and technology, transparent conductive film is also more and more widely used in transparent antenna. As a kind of high transparency material, transparent conductive film has excellent light transmission rate, which makes transparent antenna maintain high conductivity without significant impact on the line of sight, thereby maintaining good aesthetic effect in various application occasions. PET, as a commonly used thermoplastic material, has high transparency and insulation, and is a good choice for conductive film in transparent antenna. However, antenna often causes fire due to power transmission, so the flame retardance of transparent conductive film is required to be high, therefore, it is currently a problem to be solved to prepare a conductive PET film with high flame retardance for transparent antenna. SUMMARY

[0003] The present application provides a conductive PET film material for transparent antenna and a preparation method thereof, which solves the problems of poor flame retardance and poor ultraviolet resistance of the conductive PET film material in the related art.

[0004] The technical scheme of the present application is as follows:

[0005] The present application provides a conductive PET film material for transparent antenna, which comprises, from top to bottom, a copper mesh and a PET film, wherein the PET film comprises the following components by weight: PET resin 80-90 parts, compatibility agent 1-2 parts, flame retardant 8-14 parts, ultraviolet resistance agent 2-4 parts, and thermal stabilizer 0.8-1 part; the flame retardant is composed of organic phosphorus flame retardant and 4-amino-5-imidazole carboxamide.

[0006] As a further technical scheme, the mass ratio of the organic phosphorus flame retardant and 4-amino-5-imidazole carboxamide is 2-4:1.

[0007] In the present application, by limiting the mass ratio of the organic phosphorus flame retardant and 4-amino-5-imidazole carboxamide to 2-4:1, the flame retardance of the conductive PET film is further improved.

[0008] As a further technical scheme, the mass ratio of the organic phosphorus flame retardant and 4-amino-5-imidazole carboxamide is 3:1.

[0009] As a further technical solution, the phosphorus-based flame retardant comprises one or more of tricresyl phosphate, trioctyl phosphate, and tris(dimethylphenyl) phosphate.

[0010] As a further technical solution, the anti-ultraviolet agent consists of methyl p-methoxycinnamate and (2-hydroxy-4-(2-hydroxyethoxy) phenyl) (phenyl) ketone.

[0011] As a further technical solution, the mass ratio of the methyl p-methoxycinnamate and the (2-hydroxy-4-(2-hydroxyethoxy) phenyl) (phenyl) ketone is 1-3:1.

[0012] In the present application, by limiting the mass ratio of the methyl p-methoxycinnamate and the (2-hydroxy-4-(2-hydroxyethoxy) phenyl) (phenyl) ketone to 1-3:1, the anti-ultraviolet property of the conductive PET film is further improved.

[0013] As a further technical solution, the mass ratio of the methyl p-methoxycinnamate and the (2-hydroxy-4-(2-hydroxyethoxy) phenyl) (phenyl) ketone is 2:1.

[0014] As a further technical solution, the compatibilizer comprises one or both of maleic anhydride grafted polypropylene and maleic anhydride grafted polyethylene.

[0015] As a further technical solution, the heat stabilizer is triethyl phosphate.

[0016] As a further technical solution, the thickness of the PET film is 40-60 mu m.

[0017] As a further technical solution, the thickness of the copper mesh is 4.5-10 mu m.

[0018] The present application also proposes a preparation method of a conductive PET film material for a transparent antenna, comprising the following steps:

[0019] S1, after uniformly mixing the component raw materials, melt extrusion, casting, and bidirectional stretching are performed to obtain a PET film;

[0020] S2, a copper mesh is etched on the PET film by using a photolithography process to obtain a conductive PET film material for a transparent antenna.

[0021] The working principle and beneficial effects of the present application are as follows:

[0022] In the present application, PET resin is used as the base of the conductive film, and compatible agent, flame retardant, anti-ultraviolet agent and heat stabilizer are added, wherein the addition of heat stabilizer can prevent PET from degrading due to heat during processing and use, and reduce the service life of PET, the addition of flame retardant composed of organic phosphorus flame retardant and 4-amino-5-imidazole formamide improves the flame retardance of PET film, the addition of anti-ultraviolet agent can prevent the aging of PET film caused by long-term exposure to outdoor, and the addition of compatible agent improves the compatibility of each component, so that a uniform blending structure is formed between each component, and the flame retardance and ultraviolet resistance of PET film are improved. BRIEF DESCRIPTION OF DRAWINGS

[0023] The present application will be further described in detail below in combination with the drawings and specific embodiments.

[0024] Figure 1 The conductive PET film structure prepared in Example 1 is shown in the schematic diagram.

[0025] In the figure: 1 is a copper mesh, and 2 is a PET film. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present application will be clearly and completely described below in combination with the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0027] In the following examples and comparative examples:

[0028] PET resin, model RE5264 NC010, purchased from Dongguan Longyan Plastic Raw Material Co., Ltd.;

[0029] Maleic anhydride grafted polypropylene, model ZJ001, purchased from Wuhan Huaxiang Kejie Biological Technology Co., Ltd.;

[0030] Maleic anhydride grafted polyethylene, model MX110D, purchased from Dongguan Plasticjia Polymer Raw Material Co., Ltd.

[0031] Example 1

[0032] A preparation method of a conductive PET film material for transparent antenna, comprising the following steps:

[0033] S1, 80 parts of PET resin, 1 part of maleic anhydride grafted polypropylene, 8 parts of flame retardant, 2 parts of methyl p-methoxycinnamate and 0.8 parts of triethyl phosphate are uniformly mixed, and then melt extruded, cast and bidirectionally stretched to obtain a PET film with a thickness of 40 μm;

[0034] S2, etching copper mesh on the PET film by using photolithography process, the thickness of the copper mesh is 4.5μm, obtaining the conductive PET film material for transparent antenna.

[0035] The flame retardant is composed of tricresyl phosphate and 4-amino-5-imidazole carboxamide with a mass ratio of 1:1.

[0036] The conductive PET film structure prepared in the embodiment is shown in the schematic view as Figure 1 .

[0037] Example 2

[0038] A preparation method of a conductive PET film material for transparent antenna comprises the following steps:

[0039] S1, uniformly mixing 85 parts of PET resin, 1.5 parts of maleic anhydride grafted polyethylene, 11 parts of flame retardant, 3 parts of methyl p-methoxycinnamate, and 0.9 parts of triethyl phosphate, and then performing melt extrusion, casting, and bidirectional stretching to obtain a PET film with a thickness of 50μm;

[0040] S2, etching copper mesh on the PET film by using photolithography process, the thickness of the copper mesh is 7μm, obtaining the conductive PET film material for transparent antenna.

[0041] The flame retardant is composed of tricresyl phosphate and 4-amino-5-imidazole carboxamide with a mass ratio of 1:1.

[0042] Example 3

[0043] A preparation method of a conductive PET film material for transparent antenna comprises the following steps:

[0044] S1, uniformly mixing 90 parts of PET resin, 2 parts of maleic anhydride grafted polyethylene, 14 parts of flame retardant, 4 parts of methyl p-methoxycinnamate, and 1 part of triethyl phosphate, and then performing melt extrusion, casting, and bidirectional stretching to obtain a PET film with a thickness of 60μm;

[0045] S2, etching copper mesh on the PET film by using photolithography process, the thickness of the copper mesh is 10μm, obtaining the conductive PET film material for transparent antenna.

[0046] The flame retardant is composed of tricresyl phosphate and 4-amino-5-imidazole carboxamide with a mass ratio of 1:1.

[0047] Example 4

[0048] Compared with the embodiment 1, the only difference is that the mass ratio of tricresyl phosphate and 4-amino-5-imidazole carboxamide is 5:1.

[0049] Example 5

[0050] This example differs from Example 1 only in that the mass ratio of tricresyl phosphate and 4-amino-5-imidazolecarboxamide is 2:1.

[0051] Example 6

[0052] This example differs from Example 1 only in that the mass ratio of tricresyl phosphate and 4-amino-5-imidazolecarboxamide is 3:1.

[0053] Example 7

[0054] This example differs from Example 1 only in that the mass ratio of tricresyl phosphate and 4-amino-5-imidazolecarboxamide is 4:1.

[0055] Example 8

[0056] This example differs from Example 6 only in that methyl p-methoxycinnamate is replaced with an equivalent amount of (2-hydroxy-4-(2-hydroxyethoxy)phenyl)(phenyl)methanone.

[0057] Example 9

[0058] This example differs from Example 6 only in that the anti-UV agent consists of methyl p-methoxycinnamate and (2-hydroxy-4-(2-hydroxyethoxy)phenyl)(phenyl)methanone in a mass ratio of 1:2.

[0059] Example 10

[0060] This example differs from Example 6 only in that the mass ratio of methyl p-methoxycinnamate and (2-hydroxy-4-(2-hydroxyethoxy)phenyl)(phenyl)methanone is 4:1.

[0061] Example 11

[0062] This example differs from Example 6 only in that the mass ratio of methyl p-methoxycinnamate and (2-hydroxy-4-(2-hydroxyethoxy)phenyl)(phenyl)methanone is 1:1.

[0063] Example 12

[0064] This example differs from Example 6 only in that the mass ratio of methyl p-methoxycinnamate and (2-hydroxy-4-(2-hydroxyethoxy)phenyl)(phenyl)methanone is 2:1.

[0065] Example 13

[0066] The only difference between this example and Example 6 is that the mass ratio of methyl methoxycinnamate and (2-hydroxy-4-(2-hydroxyethoxy)phenyl)(phenyl)methanone is 3:1.

[0067] Comparative Example 1

[0068] The only difference between this comparative example and Example 1 is that 4-amino-5-imidazole carboxamide is replaced by an equivalent amount of guanidine sulfamate.

[0069] The oxygen index of the conductive PET film material prepared in Examples 1-13 and Comparative Example 1 is determined according to the determination method in GB / T 2406.2-2009 “Determination of the Burning Behavior of Plastics-Part 2: Guidance on the Measurement of the Burning Rate in a Horizontal and Vertical Plane”. The anti-ultraviolet property is determined according to the determination method in GB / T 16422.3-2022 “Plastics-Laboratory Light Source Exposure Test Methods-Part 3: Fluorescent UV Lamp”. The test conditions are: light source UVA-340, radiation energy 0.83 W / (m 2 ·nm), test temperature 70℃, every light exposure 4h, intermittent 1h, cycle test 50h. The tensile strength before and after light exposure is tested according to the determination method in GB / T 1040.3-2006 “Determination of the Tensile Properties of Plastics-Part 3: Test Conditions for Films and Sheeting”. The tensile strength retention rate is calculated according to the formula: tensile strength retention rate = tensile strength after light exposure / tensile strength after light exposure × 100%. The test results are recorded in Table 1.

[0070] Table 1 Performance test results of the conductive PET film material prepared in Examples 1-13 and Comparative Example 1

[0071]

[0072] In Table 1, MD represents the longitudinal direction, and TD represents the transverse direction.

[0073] Compared with Example 1, in Comparative Example 1, 4-amino-5-imidazole carboxamide is replaced by an equivalent amount of guanidine sulfamate. The results show that the oxygen index, the tensile strength before light exposure (transverse and longitudinal directions), and the tensile strength retention rate after light exposure of the conductive PET film material prepared in Example 1 are higher than those in Comparative Example 1, indicating that when the flame retardant is composed of an organic phosphorus-based flame retardant and 4-amino-5-imidazole carboxamide, the oxygen index, the tensile strength before light exposure (transverse and longitudinal directions), and the tensile strength retention rate after light exposure of the conductive PET film material can be improved.

[0074] Compared with Example 1, Examples 4-7 change the mass ratio of the organic phosphorus flame retardant and 4-amino-5-imidazole carboxamide, and the results show that the oxygen index, the tensile strength before light exposure (transverse and longitudinal) and the tensile strength retention rate after light exposure of the conductive PET film material prepared in Examples 5-7 are higher than those of Examples 1 and 4, indicating that when the mass ratio of the organic phosphorus flame retardant and 4-amino-5-imidazole carboxamide is 2-4:1, the oxygen index, the tensile strength before light exposure (transverse and longitudinal) and the tensile strength retention rate after light exposure of the conductive PET film material can be further improved. By comparing Examples 5-7, it is found that the oxygen index, the tensile strength before light exposure (transverse and longitudinal) and the tensile strength retention rate after light exposure of the conductive PET film material prepared in Example 6 are higher than those of Examples 5 and 7, indicating that when the mass ratio of the organic phosphorus flame retardant and 4-amino-5-imidazole carboxamide is 3:1, the oxygen index, the tensile strength before light exposure (transverse and longitudinal) and the tensile strength retention rate after light exposure of the conductive PET film material are the highest.

[0075] Compared with Example 6, the anti-ultraviolet agent in Example 8 is (2-hydroxy-4-(2-hydroxyethoxy) phenyl) (phenyl) ketone, and the anti-ultraviolet agent in Example 9 is methyl p-methoxycinnamate and (2-hydroxy-4-(2-hydroxyethoxy) phenyl) (phenyl) ketone, and the results show that the oxygen index, the tensile strength before light exposure (transverse and longitudinal) and the tensile strength retention rate after light exposure of the conductive PET film material prepared in Example 9 are higher than those of Examples 6 and 8, indicating that when the anti-ultraviolet agent is composed of methyl p-methoxycinnamate and (2-hydroxy-4-(2-hydroxyethoxy) phenyl) (phenyl) ketone, the oxygen index, the tensile strength before light exposure (transverse and longitudinal) and the tensile strength retention rate after light exposure of the conductive PET film material can be further improved.

[0076] Compared with Example 9, Examples 10-13 change the mass ratio of methyl p-methoxycinnamate and (2-hydroxy-4-(2-hydroxyethoxy)phenyl)(phenyl)methanone, and the results show that the oxygen index, tensile strength before light (transverse and longitudinal) and tensile strength retention rate after light of the conductive PET film material prepared in Examples 11-13 are higher than those of Examples 9 and 10, indicating that when the mass ratio of methyl p-methoxycinnamate and (2-hydroxy-4-(2-hydroxyethoxy)phenyl)(phenyl)methanone is 1-3:1, the oxygen index, tensile strength before light (transverse and longitudinal) and tensile strength retention rate after light of the conductive PET film material can be further improved; by comparing Examples 11-13, it is found that the oxygen index, tensile strength before light (transverse and longitudinal) and tensile strength retention rate after light of the conductive PET film material prepared in Example 12 are higher than those of Examples 11 and 13, indicating that when the mass ratio of methyl p-methoxycinnamate and (2-hydroxy-4-(2-hydroxyethoxy)phenyl)(phenyl)methanone is 2:1, the oxygen index, tensile strength before light (transverse and longitudinal) and tensile strength retention rate after light of the conductive PET film material prepared are the highest.

[0077] The above only describes preferred embodiments of the present application and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A conductive PET film material for transparent antennas, characterized by, From top to bottom are copper mesh, PET film, the PET film comprises the following components by weight: PET resin 80~90 parts, compatibilizer 1~2 parts, flame retardant 8~14 parts, ultraviolet resistant agent 2~4 parts, heat stabilizer 0.8~1 part; the flame retardant consists of organic phosphorus flame retardant and 4-amino-5-imidazole formamide; The mass ratio of the organic phosphorus flame retardant and 4-amino-5-imidazole formamide is 2~4:1; The phosphorus flame retardant comprises one or more of tricresyl phosphate, trioctyl phosphate, tris(dimethylphenyl) phosphate.

2. The conductive PET film material for transparent antenna according to claim 1, wherein, The ultraviolet resistant agent consists of methyl p-methoxycinnamate and (2-hydroxy-4-(2-hydroxyethoxy) phenyl) (phenyl) ketone.

3. The conductive PET film material for transparent antenna according to claim 2, wherein, The mass ratio of the methyl p-methoxycinnamate and (2-hydroxy-4-(2-hydroxyethoxy) phenyl) (phenyl) ketone is 1~3:

1.

4. The conductive PET film material for transparent antenna according to claim 1, wherein, The compatibilizer comprises one or both of maleic anhydride grafted polypropylene and maleic anhydride grafted polyethylene.

5. The conductive PET film material for transparent antenna according to claim 1, wherein, The heat stabilizer is triethyl phosphate.

6. The conductive PET film material for transparent antenna according to claim 1, wherein, The thickness of the PET film is 40~60μm.

7. The conductive PET film material for transparent antenna according to claim 1, wherein, The thickness of the copper mesh is 4.5~10μm.

8. The method of claim 1-7, wherein the method further comprises the step of: Comprises the following steps: ​ S1, after mixing the component raw materials uniformly, melt extrusion, casting, bidirectional stretching to obtain PET film; S2, using photolithography process to etch copper mesh on the PET film, to obtain conductive PET film material that can be used for transparent antenna.

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