Longitudinal conductive film as well as preparation method and application thereof

Abstract

The invention discloses a longitudinal conductive film as well as a preparation method and application thereof. The longitudinal conductive film is prepared from the following components in parts by weight: 10-40 parts of base adhesive, 40-60 parts of conductive filler, 0.5-5 parts of a catalyst, 0.1-1 part of an inhibitor, 0.3-3 parts of a cross-linking agent and 0.1-1 part of a silane coupling agent. The longitudinal conductive film is obtained by improving a common conductive film which is conductive in all directions, and the longitudinal conductive film has the effects of transverse insulation and longitudinal conduction.

Description

Technical Field

[0001] The present invention relates to the technical field of display devices, and in particular to a longitudinal conductive film and a preparation method and application thereof. Background Art

[0002] With the continuous progress of society and the continuous improvement of living standards, people have higher and higher requirements for the cost and function of display devices. Since the display module requires the conductive film to be horizontally insulated and vertically conductive, the conductive films on the market are all omnidirectionally conductive, which is not conducive to application in display modules.

[0003] Therefore, the prior art still needs to be improved and developed. Summary of the invention

[0004] In view of the above-mentioned deficiencies in the prior art, the purpose of the present invention is to provide a longitudinal conductive film and a preparation method and application thereof, aiming to solve the problem that the existing conductive film is omnidirectional and is not suitable for application in display modules.

[0005] The technical solution of the present invention is as follows:

[0006] The first aspect of the present invention provides a longitudinal conductive film, which is prepared by comprising the following components in parts by weight: 10-40 parts of base glue, 40-60 parts of conductive filler, 0.5-5 parts of catalyst, 0.1-1 parts of inhibitor, 0.3-3 parts of cross-linking agent, and 0.1-1 parts of silane coupling agent.

[0007] Preferably, the base rubber is selected from one or more of methyl vinyl silicone rubber, methyl silicone rubber, fluorosilicone rubber, phenyl rubber, liquid silicone rubber, and liquid fluorosilicone rubber.

[0008] Preferably, the conductive filler is selected from one or more of nickel-coated graphite powder, nickel-coated fiber, silver-aluminum powder, silver-plated glass beads, silver powder, nickel-aluminum powder, silver-copper powder, and silver-nickel powder.

[0009] Preferably, the catalyst is selected from one or both of a Carls catalyst and a coated platinum catalyst.

[0010] Preferably, the inhibitor is selected from one or more of 1-ethyn-1-cyclohexanol, 3-methyl-1-butyn-3-ol, 3,5-dimethyl-1-hexyn-3-ol, and 3-phenyl-1-butyn-ol.

[0011] Preferably, the crosslinking agent is hydrogen-containing silicone oil; the hydrogen-containing silicone oil includes side chain hydrogen-containing silicone oil with a hydrogen content of 0.1-0.75% and / or terminal hydrogen silicone oil with a hydrogen content of 0.1-0.75%.

[0012] Preferably, the silane coupling agent is selected from one or more of a titanate coupling agent, γ-aminopropyltriethoxysilane, γ-glycidyloxypropyltrimethoxysilane, tetraallylsilane, vinyltrimethoxysilane, vinyltriisopropoxysilane, and an organic silicon coupling agent.

[0013] The second aspect of the present invention provides a method for preparing the longitudinal conductive film, the method comprising the following steps:

[0014] The base rubber is mixed with the conductive filler and the silane coupling agent, and subjected to a first kneading process to obtain a rubber compound;

[0015] The rubber material is mixed with a catalyst, an inhibitor and a cross-linking agent, and subjected to a second kneading process to obtain a conductive mixed rubber;

[0016] The conductive mixed rubber is subjected to a forming process and a vulcanization process in sequence to obtain the longitudinal conductive rubber sheet.

[0017] Preferably, the first kneading treatment is carried out at a speed of 10-50 r / min, a time of 2-5 h, and a temperature of 100-150° C.;

[0018] The second kneading process has a rotation speed of 10-40 r / min, a time of 10-40 min, and a temperature below 35° C.;

[0019] The temperature of the vulcanization treatment is 120° C.-180° C., and the time is 2-5 hours.

[0020] The third aspect of the present invention provides application of the above longitudinal conductive film in a display device.

[0021] Beneficial effects: The present invention provides a longitudinal conductive film and a preparation method and application thereof, wherein the longitudinal conductive film comprises the following components in parts by weight: 10-40 parts of base glue, 40-60 parts of conductive filler, 0.5-5 parts of catalyst, 0.1-1 parts of inhibitor, 0.3-3 parts of cross-linking agent, and 0.1-1 parts of silane coupling agent. The present invention improves on the basis of the common conductive film with all-round conductivity to obtain the longitudinal conductive film, which has the effects of transverse insulation and longitudinal conductivity. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a physical picture of the longitudinal conductive film prepared in Example 1 of the present invention. DETAILED DESCRIPTION

[0023] The present invention provides a longitudinal conductive film and a preparation method and application thereof. To make the purpose, technical solution and effect of the present invention clearer and more specific, the present invention is further described in detail below. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0024] An embodiment of the present invention provides a longitudinal conductive film, which is prepared by comprising the following components in parts by weight: 10-40 parts of base glue, 40-60 parts of conductive filler, 0.5-5 parts of catalyst, 0.1-1 parts of inhibitor, 0.3-3 parts of crosslinking agent, and 0.1-1 parts of silane coupling agent.

[0025] Compared with common conductive films with all-round conductivity, the longitudinal conductive film material prepared by using the above components in this embodiment has the effects of lateral insulation and longitudinal conductivity, as well as excellent mechanical properties and excellent weather resistance. In addition, the longitudinal conductive film obtained in this embodiment also has good softness, can be better bonded to the glass substrate, and can be cut into different specifications according to product requirements. Moreover, under a certain stress range, the longitudinal conductive film prepared in this embodiment changes its longitudinal resistance as the stress changes.

[0026] The principle of the conductive film on the market is generally to use the method of overfilling powder to make the film conductive in both the longitudinal and transverse directions. However, this embodiment reduces the overfilling amount of powder (conductive filler) and modifies the powder with a silane coupling agent to improve the compatibility of the powder with the base glue, and arranges the powder in an orderly and tight manner, thereby achieving the functions of longitudinal conductivity and transverse non-conductivity.

[0027] The conductive film can be conductive in the longitudinal direction and non-conductive in the transverse direction by controlling the dosage of each component of the conductive film within the dosage range of the embodiment of the present invention.

[0028] In some embodiments, the base rubber is selected from one or more of methyl vinyl silicone rubber, methyl silicone rubber, fluorosilicone rubber, phenyl rubber, liquid silicone rubber, and liquid fluorosilicone rubber.

[0029] In some embodiments, the conductive filler is selected from one or more of nickel-coated graphite powder, nickel-coated fiber, silver-aluminum powder, silver-plated glass beads, silver powder, nickel-aluminum powder, silver-copper powder, and silver-nickel powder.

[0030] In some preferred embodiments, the longitudinal conductivity of the conductive film can be improved by using nickel-coated graphite powder and silver-coated glass microspheres as conductive fillers.

[0031] In some embodiments, the catalyst is selected from one or both of a Carls catalyst and a coated platinum catalyst.

[0032] In some preferred embodiments, the catalyst is a Custer platinum catalyst, which has the advantages of low vulcanization temperature, fast vulcanization speed, stable performance and non-toxic products.

[0033] In some embodiments, the inhibitor is selected from one or more of 1-ethyn-1-cyclohexanol, 3-methyl-1-butyn-3-ol, 3,5-dimethyl-1-hexyn-3-ol, and 3-phenyl-1-butyn-ol.

[0034] The addition of inhibitors is to prevent the coated platinum catalyst from prematurely vulcanizing at room temperature and to ensure the subsequent operation time of the rubber compound.

[0035] In some embodiments, the crosslinking agent is hydrogen-containing silicone oil; the hydrogen-containing silicone oil includes side chain hydrogen-containing silicone oil with a hydrogen content of 0.1-0.75% and / or terminal hydrogen silicone oil with a hydrogen content of 0.1-0.75%.

[0036] Adding a cross-linking agent can improve the strength of the overall rubber compound, thereby improving the strength of the longitudinal conductive film, such as improving tensile strength, tear strength and other related indicators.

[0037] In some embodiments, the silane coupling agent is selected from one or more of a titanate coupling agent, γ-aminopropyltriethoxysilane, γ-glycidyloxypropyltrimethoxysilane, tetraallylsilane, vinyltrimethoxysilane, vinyltriisopropoxysilane, and an organic silicon coupling agent.

[0038] Adding silane coupling agent can evenly disperse the conductive filler in the rubber system and better combine with the rubber.

[0039] The embodiment of the present invention provides a method for preparing the longitudinal conductive film, the method comprising the following steps:

[0040] The base rubber is mixed with the conductive filler and the silane coupling agent, and subjected to a first kneading process to obtain a rubber compound;

[0041] The rubber material is mixed with a catalyst, an inhibitor and a cross-linking agent, and subjected to a second kneading process to obtain a conductive mixed rubber;

[0042] The conductive mixed rubber is subjected to a forming process and a vulcanization process in sequence to obtain the longitudinal conductive rubber sheet.

[0043] In some embodiments, the first kneading process is performed at a speed of 10-50 r / min, a time of 2-5 h, and a temperature of 100-150° C.;

[0044] The second kneading process has a rotation speed of 10-40 r / min, a time of 10-40 min, and a temperature below 35° C.;

[0045] The temperature of the vulcanization treatment is 120° C.-180° C., and the time is 2-5 hours.

[0046] In some embodiments, the method for preparing the longitudinal conductive film comprises the following steps:

[0047] The base rubber is mixed with the conductive filler and the silane coupling agent, and kneaded for 30-50 minutes at a vacuum, 125° C., and a rotation speed of 10-50 r / min to obtain a rubber compound;

[0048] The rubber material is mixed with a catalyst, an inhibitor and a cross-linking agent, and kneaded at a rotation speed of 10-40 r / min for 40-60 minutes to obtain a conductive mixed rubber.

[0049] The conductive mixed rubber is calendered to obtain a sheet-like conductive film, the conductive film is cured at 120° C. for 30 minutes to complete a pre-curing forming process, and then baked at 180° C. for 2 hours to complete a vulcanization process to obtain the longitudinal conductive film.

[0050] In this embodiment, the base rubber is first mixed with the conductive filler and the silane coupling agent, and then subjected to a first stirring treatment under heating and vacuuming conditions to obtain a bubble-free and dense rubber material; then the rubber material is subjected to a second stirring treatment with the catalyst, inhibitor, and cross-linking agent to obtain a uniformly mixed, bubble-free conductive compound rubber, and finally prepared into a longitudinal conductive film through calendering, pre-curing treatment, and vulcanization treatment.

[0051] The conductive film prepared by the method of this embodiment has the properties of longitudinal conductivity, horizontal resistance insulation, and excellent mechanical properties and weather resistance.

[0052] The embodiment of the present invention provides application of the above longitudinal conductive film in a display device.

[0053] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments, and are only for illustrating the present invention but not limiting the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present invention.

[0054] Example 1

[0055] The preparation of the longitudinal conductive film comprises the following steps:

[0056] 40 parts of methyl vinyl silicone rubber, 58 parts of nickel-coated graphite powder and 1 part of vinyl trimethoxysilane were mixed, vacuumed and kneaded at 120° C. and 40 r / min for 1 hour to obtain a rubber compound; after the rubber compound was cooled, 1 part of side chain hydrogenated silicone oil and 0.2 parts of 1-acetylene-1-cyclohexanol were added to the rubber compound, the mixture was kneaded at 20 r / min for 40 minutes at below 35° C., and 1 part of platinum catalyst 3000 ppm was added thereto at 20 r / min. After kneading at a speed of in for 50 minutes, a conductive rubber mixture is obtained; the conductive rubber mixture is then placed in an open mixer for mixing and prepared into a 0.8 mm thick preformed film, which is then rolled using a four-roll calender to prepare a 0.5 mm conductive film, and finally cured in a tunnel furnace at a curing temperature of 120°C for 30 minutes. The formed conductive film is then vulcanized in an oven at a vulcanization temperature of 180°C for 2 hours to obtain a longitudinal conductive film, as shown in the physical figure. Figure 1 shown.

[0057] Example 2

[0058] The preparation of the longitudinal conductive film comprises the following steps:

[0059] 30 parts of methyl vinyl silicone rubber, 65 parts of silver-plated glass microbeads and 2 parts of vinyl trimethoxysilane were mixed, and the mixture was vacuumed and kneaded at 120° C. and 40 r / min for 1 hour to obtain a rubber compound; after the rubber compound was cooled, 1 part of side chain hydrogen-containing silicone oil and 0.2 parts of 1-acetylene-1-cyclohexanol were added to the rubber compound, and the mixture was kneaded at 20 r / min for 40 minutes at a temperature below 35° C., and 1 part of platinum catalyst 3000 ppm was added thereto at 20 After kneading at a speed of r / min for 50 minutes, a conductive mixed rubber is obtained; the conductive mixed rubber is then placed in an open mixer for mixing and prepared into a 0.8mm thick pre-formed rubber sheet, which is then calendered using a four-roll calender to prepare a 0.5mm conductive rubber sheet, and finally cured in a tunnel furnace at a curing temperature of 120°C for 30 minutes. The formed conductive rubber is then vulcanized in an oven at a vulcanization temperature of 180°C for 2 hours to obtain a longitudinal conductive rubber sheet.

[0060] Example 3

[0061] The preparation of the longitudinal conductive film comprises the following steps:

[0062] 30 parts of methyl vinyl silicone rubber, 65 parts of silver aluminum powder and 2 parts of vinyl trimethoxy silane are mixed, vacuumed, kneaded at 120°C and 50 r / min for 1 hour to obtain a rubber compound; after the rubber compound is cooled, 1 part of side chain hydrogen silicone oil and 0.2 parts of 1-acetylene-1-cyclohexanol are added to the rubber compound, the above-mentioned mixture is kneaded at below 35°C and 20 r / min for 40 minutes, 1 part of platinum catalyst 3000ppm is added thereto, and kneaded at 20 r / min for 50 minutes to obtain a conductive mixed rubber; the conductive mixed rubber is placed in an open mill for mixing and prepared into a 0.8mm thick pre-formed film, and then calendered with a four-roll calender to prepare a 0.5mm conductive film, and finally cured and formed by a tunnel furnace, the tunnel furnace curing temperature is 120°C, the curing time is 30 minutes, and the formed conductive film is baked and vulcanized in an oven, the vulcanization temperature is 180°C, and the baking time is 2 hours to obtain a longitudinal conductive film.

[0063] Example 4

[0064] The preparation of the longitudinal conductive film comprises the following steps:

[0065] 30 parts of methyl vinyl silicone rubber, 65 parts of silver copper powder and 2 parts of vinyl trimethoxy silane are mixed, vacuumed, kneaded at 120°C and 40 r / min for 1 hour to obtain a rubber compound; after the rubber compound is cooled, 1 part of side chain hydrogenated silicone oil and 0.2 parts of 1-acetylene-1-cyclohexanol are added to the rubber compound, the above-mentioned mixture is kneaded at below 35°C and 20 r / min for 40 minutes, 1 part of platinum catalyst 3000ppm is added thereto, and kneaded at 20 r / min for 50 minutes to obtain a conductive mixed rubber; the conductive mixed rubber is placed in an open mixer for mixing and prepared into a 0.8mm thick preformed film, and then calendered with a four-roll calender to prepare a 0.5mm conductive film, and finally cured and formed by a tunnel furnace, the tunnel furnace curing temperature is 120°C, the curing time is 30 minutes, and the formed conductive film is baked and vulcanized in an oven, the vulcanization temperature is 180°C, and the baking time is 2 hours to obtain a longitudinal conductive film.

[0066] Comparative Example 1

[0067] The preparation of the conductive film comprises the following steps:

[0068] 40 parts of methyl vinyl silicone rubber and 58 parts of nickel-coated graphite powder are mixed, and the mixture is vacuumed, kneaded at 120° C. and 40 r / min for 1 hour to obtain a rubber compound; after the rubber compound is cooled, 1 part of side chain hydrogen-containing silicone oil and 0.2 parts of 1-acetylene-1-cyclohexanol are added to the rubber compound, the above-mentioned mixture is kneaded at below 35° C. and 20 r / min for 40 minutes, 1 part of platinum catalyst 3000 ppm is added thereto, and the mixture is kneaded at 20 r / min for 50 minutes to obtain a conductive mixed rubber compound; the conductive mixed rubber compound is placed in an open mixer for mixing and prepared into a 0.8 mm thick preformed rubber sheet, and then calendered with a four-roll calender to prepare a 0.5 mm conductive rubber sheet, and finally cured and formed by a tunnel furnace, the tunnel furnace curing temperature is 120° C., the curing time is 30 minutes, and the formed conductive rubber is baked and vulcanized in an oven, the vulcanization temperature is 180° C., and the baking time is 2 hours to obtain a conductive rubber compound.

[0069] Comparative Example 2

[0070] The preparation of the conductive film comprises the following steps:

[0071] 30 parts of fluorosilicone rubber, 65 parts of silver-plated glass microbeads and 2 parts of vinyltrimethoxysilane are mixed, and the mixture is vacuumed, kneaded at 120° C. and 40 r / min for 1 hour to obtain a rubber compound; after the rubber compound is cooled, 1 part of side chain hydrogenated silicone oil and 0.2 parts of 1-acetylene-1-cyclohexanol are added to the rubber compound, the above-mentioned mixture is kneaded at below 35° C. and 20 r / min for 40 minutes, 1 part of platinum catalyst 3000 ppm is added thereto, and the mixture is kneaded at 20 r / min for 50 minutes to obtain a conductive mixed rubber compound; the conductive mixed rubber compound is placed in an open mill for mixing and prepared into a 0.8 mm thick preformed rubber sheet, and then calendered with a four-roll calender to prepare a 0.5 mm conductive rubber sheet, and finally cured and formed by a tunnel furnace, the tunnel furnace curing temperature is 120° C., the curing time is 30 minutes, and the formed conductive rubber is baked and vulcanized in an oven, the vulcanization temperature is 180° C., and the baking time is 2 hours to obtain a conductive rubber compound.

[0072] Comparative Example 3

[0073] The preparation of the conductive film comprises the following steps:

[0074] 30 parts of methyl vinyl silicone rubber, 50 parts of silver aluminum powder and 2 parts of vinyl trimethoxy silane are mixed, and the mixture is vacuumed, kneaded at 120° C. and 40 r / min for 1 hour to obtain a rubber compound; after the rubber compound is cooled, 1 part of side chain hydrogen silicone oil and 0.2 parts of 1-acetylene-1-cyclohexanol are added to the rubber compound, the above-mentioned mixture is kneaded at below 35° C. and 20 r / min for 40 minutes, and 1 part of platinum catalyst 3000 ppm is added thereto, and kneaded at 20 r / min for 50 minutes to obtain a conductive mixed rubber; the conductive mixed rubber is placed in an open mill for mixing and prepared into a 0.8 mm thick pre-formed film, and then calendered with a four-roll calender to prepare a 0.5 mm conductive film, and finally cured and formed by a tunnel furnace, the tunnel furnace curing temperature is 120° C., the curing time is 30 minutes, and the formed conductive film is baked and vulcanized in an oven, the vulcanization temperature is 180° C., and the baking time is 2 hours to obtain a conductive film.

[0075] Comparative Example 4

[0076] The preparation of the conductive film comprises the following steps:

[0077] 25 parts of methyl vinyl silicone rubber, 70 parts of silver copper powder and 2 parts of vinyl trimethoxy silane are mixed, and the mixture is vacuumed, kneaded at 120°C and 40 r / min for 1 hour to obtain a rubber compound; after the rubber compound is cooled, 1 part of side chain hydrogen silicone oil and 0.2 parts of 1-acetylene-1-cyclohexanol are added to the rubber compound, the above-mentioned mixture is kneaded at below 35°C and 20 r / min for 40 minutes, 1 part of platinum catalyst 3000ppm is added thereto, and kneaded at 20 r / min for 50 minutes to obtain a conductive mixed rubber; the conductive mixed rubber is placed in an open mill for mixing and prepared into a 0.8mm thick pre-formed rubber sheet, and then calendered with a four-roll calender to prepare a 0.5mm conductive rubber sheet, and finally cured and formed by a tunnel furnace, the tunnel furnace curing temperature is 120°C, the curing time is 30 minutes, and the formed conductive rubber is baked and vulcanized in an oven, the vulcanization temperature is 180°C, and the baking time is 2 hours to obtain a conductive rubber compound.

[0078] The longitudinal conductive films prepared in Examples 1-4 and the conductive films prepared in Comparative Examples 1-4 were tested as follows. The results are shown in Tables 1 and 2 below:

[0079]

[0080]

[0081] Table 2

[0082] Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 Shore A (Shore hardness) 60±7 70±7 60±7 60±7 Density(g / cm3) 1.8±0.2 1.7±0.2 2.0±0.2 3.8±0.2 Tensile strength(Mpa) ≥2 ≥1.5 ≥1.8 ≥1.5 Elongation at break (%) ≥100 ≥100 ≥100 ≥100 Tear strength (KN / m) ≥12 ≥8 ≥8 ≥8 XY lateral resistance (3N load) none none none 0.3Ω XY horizontal resistance (100N load) 0.5Ω 0.2Ω none 0.1Ω XY horizontal resistance (500N load) 0.1Ω 0.1Ω none 50mΩ XZ longitudinal resistance (3N load) 1Ω 0.5Ω none 0.3Ω XZ longitudinal resistance (100N load) 0.3Ω 0.1Ω none 200mΩ XZ longitudinal resistance (500N load) 0.1Ω 0.05Ω none 100mΩ

[0083] The above experimental results show that:

[0084] 1) Compared with comparative examples 1-4, the conductive films prepared in embodiments 1-4 have the characteristics of longitudinal conductive function, horizontal resistance insulation, good basic adhesion with the glass of the display panel, and show excellent mechanical properties and weather resistance.

[0085] 2) In comparative example 1, due to the lack of addition of silane coupling agent, the nickel-coated graphite powder is unevenly dispersed in the silicone rubber, which in turn causes the conductive film to produce conductive properties in the XY horizontal direction, and the lateral non-conductive effect cannot be guaranteed.

[0086] 3) In comparative example 2, methyl silicone rubber is replaced with fluorosilicone rubber, which mainly affects the hardness of the conductive film and the dispersion effect of various functional fillers in the base rubber is poor, resulting in conductive effects in both the XY direction and the XZ direction of the conductive film.

[0087] 4) In comparative example 3, reducing the amount of silver aluminum powder filling will affect the surface resistance of the conductive film and even cause the conductive film to be non-conductive.

[0088] 5) Comparative Example 4 increases the amount of silver-copper powder added to improve the longitudinal conductivity of the conductive film. However, due to the high proportion of silver-copper powder, the dispersion effect in the base glue is poor, so it is impossible to form a longitudinal conductive path.

[0089] It should be understood that the application of the present invention is not limited to the above examples. For ordinary technicians in this field, improvements or changes can be made based on the above description. All these improvements and changes should fall within the scope of protection of the claims attached to the present invention.

Claims

1. A longitudinal conductive film, characterized in that: The longitudinal conductive film is prepared by comprising the following components in parts by weight: 10-40 parts of base glue, 40-60 parts of conductive filler, 0.5-5 parts of catalyst, 0.1-1 parts of inhibitor, 0.3-3 parts of crosslinking agent and 0.1-1 parts of silane coupling agent.

2. The longitudinal conductive film according to claim 1, characterized in that: The base rubber is selected from one or more of methyl vinyl silicone rubber, methyl silicone rubber, fluorosilicone rubber, phenyl rubber, liquid silicone rubber, and liquid fluorosilicone rubber.

3. The longitudinal conductive film according to claim 1, characterized in that: The conductive filler is selected from one or more of nickel-coated graphite powder, nickel-coated fiber, silver-aluminum powder, silver-plated glass beads, silver powder, nickel-aluminum powder, silver-copper powder, and silver-nickel powder.

4. The longitudinal conductive film according to claim 1, characterized in that: The catalyst is selected from one or both of a Carls catalyst and a coated platinum catalyst.

5. The longitudinal conductive film according to claim 1, characterized in that: The inhibitor is selected from one or more of 1-ethyn-1-cyclohexanol, 3-methyl-1-butyn-3-ol, 3,5-dimethyl-1-hexyn-3-ol, and 3-phenyl-1-butyn-ol.

6. The longitudinal conductive film according to claim 1, characterized in that: The cross-linking agent is hydrogen-containing silicone oil; the hydrogen-containing silicone oil includes side chain hydrogen-containing silicone oil with a hydrogen content of 0.1-0.75% and / or terminal hydrogen silicone oil with a hydrogen content of 0.1-0.75%.

7. The longitudinal conductive film according to claim 1, characterized in that: The silane coupling agent is selected from one or more of a titanate coupling agent, γ-aminopropyltriethoxysilane, γ-glycidyloxypropyltrimethoxysilane, tetraallylsilane, vinyltrimethoxysilane, vinyltriisopropoxysilane and an organic silicon coupling agent.

8. A method for preparing the longitudinal conductive film according to claim 1, characterized in that: The preparation method comprises the following steps: The base rubber is mixed with the conductive filler and the silane coupling agent, and subjected to a first kneading process to obtain a rubber compound; The rubber material is mixed with a catalyst, an inhibitor and a cross-linking agent, and subjected to a second kneading process to obtain a conductive mixed rubber; The conductive mixed rubber is subjected to a forming process and a vulcanization process in sequence to obtain the longitudinal conductive rubber sheet.

9. The method for preparing a longitudinal conductive film according to claim 8, characterized in that: The first kneading process has a rotation speed of 10-50 r / min, a time of 2-5 h, and a temperature of 100-150° C.; The second kneading process has a rotation speed of 10-40 r / min, a time of 10-40 min, and a temperature below 35° C.; The temperature of the vulcanization treatment is 120° C.-180° C., and the time is 2-5 hours.

10. Use of the longitudinal conductive film according to claim 1 in a display device.

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