Insulating self-melting adhesive tape as well as preparation method and application thereof

Abstract

The invention discloses an insulating self-melting adhesive tape as well as a preparation method and application thereof. The insulating self-melting adhesive tape is prepared from the following components in parts by weight: 20 to 150 parts of butyl rubber, 20 to 100 parts of polyolefin elastomer, 10 to 40 parts of polyisobutene, 15 to 40 parts of polyethylene, 200 to 300 parts of filler, 10 to 50 parts of tackifier and 15 to 50 parts of plasticizer, wherein the polyolefin elastomer is an ethylene-octylene copolymer. In a formula system of the insulating self-adhesive tape, the ethylene-octylene copolymer is used as a polyolefin elastomer, and is matched with the butyl rubber, the polyisobutene and the polyethylene for use, so that reliable physical crosslinking can be provided for the self-adhesive tape, and the mechanical property stability is improved; and the processing performance and the electrical performance of the insulating self-adhesive tape can be improved, and the insulating self-adhesive tape has a good application prospect in the field of cable accessory adhesion.

Description

Technical Field

[0001] This invention relates to the field of insulating tape technology, and in particular to an insulating self-fusing tape, its preparation method, and its application. Background Technology

[0002] Cable accessories are intermediate and terminal links for various cables in cable lines. Their main function is to restore cable performance and ensure cable extension and termination connections. Together with the cables, they form the power transmission network. Self-adhesive insulating tape is a self-fusing adhesive tape used for insulation, sealing, and waterproofing of wire and cable accessories, or for protection, repair, and sealing of pipes. It is mainly made of rubber, oil, and powder mixtures, and has relatively excellent insulation properties, self-adhesion, ductility, and waterproof sealing properties. After wrapping, it can fuse with the insulation layer.

[0003] In related technologies, because insulating self-adhesive tape is a non-crosslinked product, its performance often becomes unstable under extreme environments such as high temperature, high humidity, or low temperature. For example, at high temperatures, insulating self-adhesive tape easily softens, loses its support, and cracks, affecting its insulation performance. Furthermore, conventional insulating self-adhesive tapes currently suffer from insufficient mechanical properties, such as insufficient tensile strength or low elongation at break. During use, they are not only prone to breakage under tension, but also susceptible to rapid expansion and overall failure if there are small gaps (such as sharp-angle wrapping) at the edges or surface during wrapping, especially under stress.

[0004] Therefore, there is an urgent need to find an insulating self-fusing tape with excellent heat resistance and mechanical properties, and its preparation method. Summary of the Invention

[0005] This invention aims to at least solve one of the technical problems existing in the prior art. To this end, this invention proposes an insulating self-fusing tape, which has the advantages of mild processing conditions, good insulation, stable mechanical properties, and high elasticity, and can be widely used in cable accessory adhesives.

[0006] The present invention also proposes a method for preparing the above-mentioned self-fusing insulating tape.

[0007] The present invention also proposes the application of the above-mentioned self-fusing insulating tape and its preparation method in the preparation of insulating materials.

[0008] In a first aspect, the present invention provides an insulating self-fusing tape, wherein the raw materials for preparation, by weight, comprise the following components: Butyl rubber 20-150 parts, polyolefin elastomer 20-100 parts, polyisobutylene 10-40 parts, polyethylene 15-40 parts, filler 200-300 parts, tackifier 10-50 parts and plasticizer 15-50 parts; The polyolefin elastomer is an ethylene-octene copolymer.

[0009] The self-fusing insulating tape according to embodiments of the present invention has at least the following beneficial effects: The self-fusing insulating tape of this invention has the advantages of mild processing conditions, good insulation, stable mechanical properties, and high elasticity. In the formulation system of this self-adhesive insulating tape, ethylene-octene copolymer is used as the polyolefin elastomer (POE). The introduction of ethylene-octene copolymer not only provides reliable physical cross-linking for the tape, thereby improving its mechanical property stability during use, but also helps to improve the processing performance and electrical properties (such as volume resistivity) of the self-adhesive insulating tape. During the use of the tape, due to the physical cross-linking effect of the long-branched chains, it can still tightly adhere to the shielding layer and the insulation layer even at low temperatures (such as -40°C), without forming air trappings, which helps to ensure good stability and improve the service life of cable accessories.

[0010] In some embodiments of the present invention, the melt index of the ethylene-octene copolymer is 0.4~0.6 g / min.

[0011] In some embodiments of the present invention, the density of the ethylene-octene copolymer is 0.8~0.9 g / cm³. 3 .

[0012] In some embodiments of the present invention, the polyisobutylene is high molecular weight polyisobutylene with a molecular weight of 3 million to 5 million.

[0013] In some embodiments of the present invention, the polyethylene is selected from at least one or a combination of high-density polyethylene, linear low-density polyethylene (LLDPE) or low-density polyethylene (LDPE).

[0014] The high-density polyethylene, linear low-density polyethylene, or low-density polyethylene mentioned are commercially available finished products, wherein the density of the high-density polyethylene is 0.941~0.960 g / cm³. 3 The crystallinity is between 80% and 90%, and the softening point is between 125 and 135°C; the densities of the LLDPE and LDPE are both between 0.91 and 0.925 g / cm³. 3 While both are different, their molecular weight distributions differ; LLDPE has a narrower molecular weight distribution, while LDPE has a wider molecular weight distribution.

[0015] In some embodiments of the present invention, the filler is selected from one or a combination of calcium carbonate, carbon black, mica powder, and calcined kaolin.

[0016] In some embodiments of the present invention, the tackifier is selected from one or a combination of polyisobutylene, coumarone resin and petroleum resin with a molecular weight of 1300-2400.

[0017] In some embodiments of the present invention, the plasticizer is selected from one or a combination of several of leucocyclohexane oil, diisononyl phthalate, and epoxidized soybean oil.

[0018] In some embodiments of the present invention, the raw materials for preparing the insulating self-fusing tape further include at least one of an antioxidant, a lubricant, and a dispersant.

[0019] In some embodiments of the present invention, the antioxidant is selected from one or more of pentaerythritol tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate], butylated hydroxytoluene, N-isopropyl-N'-phenyl-p-phenylenediamine, and 2,2,4-trimethyl-1,2-dihydroquinoline polymer.

[0020] In some embodiments of the present invention, the lubricant comprises stearic acid.

[0021] In some embodiments of the present invention, the raw materials include the following components in parts by weight: The ingredients include 60-120 parts butyl rubber, 40-80 parts polyolefin elastomer, 15-40 parts polyisobutylene, 15-40 parts polyethylene, 200-300 parts filler, 10-20 parts tackifier, 15-50 parts plasticizer, 1-5 parts antioxidant, and 1-5 parts lubricant.

[0022] A second aspect of the present invention provides a method for preparing an insulating self-fusing adhesive tape as described in the first aspect, comprising: The raw materials are mixed and then extruded to obtain the final product. The preparation method according to the embodiments of the present invention has at least the following beneficial effects: the preparation method of the insulating self-fusing tape of the present invention is simple, the raw materials are readily available, and it is suitable for industrial production.

[0023] In some embodiments of the present invention, the reaction temperature for mixing is 100-180°C. For example, it can be 110°C, 120°C, 130°C, 150°C, 170°C, 180°C, etc.

[0024] In some embodiments of the present invention, the mixing time is 20-60 minutes.

[0025] A third aspect of the present invention provides the application of the self-fusing insulating tape as described in the first aspect or the preparation method as described in the second aspect in the preparation of insulating materials.

[0026] Other features and advantages of the present invention will be set forth in the following description. Detailed Implementation

[0027] The following will describe the concept and technical effects of the present invention clearly and completely with reference to embodiments, so as to fully understand the purpose, features and effects of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are all within the scope of protection of the present invention.

[0028] The terms "preferred," "more preferably," etc., used in this invention refer to embodiments of the invention that provide certain beneficial effects under certain circumstances. However, other embodiments may also be preferred under the same or other circumstances. Furthermore, the description of one or more preferred embodiments does not imply that other embodiments are unavailable, nor is it intended to exclude other embodiments from the scope of this invention.

[0029] When a numerical range is disclosed herein, the range is considered continuous and includes the minimum and maximum values ​​of the range, as well as every value between the minimum and maximum values. Furthermore, when the range refers to integers, it includes every integer between the minimum and maximum values ​​of the range. Additionally, when multiple ranges are provided to describe a feature or characteristic, the ranges may be combined. In other words, unless otherwise specified, all ranges disclosed herein should be understood to include any and all subranges to which they are incorporated.

[0030] In the description of this invention, the reference term "and / or" includes all and any combination of one or more of the associated listed items.

[0031] In the description of this invention, the terms "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0032] Unless otherwise specified in the examples, the procedures should be performed under standard conditions or conditions recommended by the manufacturer. Reagents or instruments whose manufacturers are not specified are all commercially available products.

[0033] Example 1: This embodiment provides a highly elastic insulating self-fusing tape and its preparation method. The raw materials for preparing the highly elastic insulating self-fusing tape, by weight, are shown in Table 1: Table 1:

[0034] The polyolefin elastomer (POE) is an ethylene-octene copolymer with a melt index of 0.5 g / min and a density of 0.868 g / cm³. 3 Purchased from Dow Chemical; polyisobutylene purchased from Xinhui, with a molecular weight of approximately 3.52 million to 4.54 million; high-density polyethylene (HDPE) purchased from Lanzhou Petrochemical Company Petrochemical Plant; low molecular weight polyisobutylene with a molecular weight of 1300 to 2400 purchased from BASF; antioxidant is 2,2,4-trimethyl-1,2-dihydroquinoline polymer.

[0035] The preparation method of the above-mentioned highly elastic self-fusing insulating tape includes the following steps: According to the above weight proportions, the raw materials are put into the internal mixer and mixed at 130°C for 30 minutes to make them uniform. After discharge, the material is cold-fed to the calender, where the temperature of the calender is set at 130°C. After extrusion and calendering, the self-adhesive insulating tape is obtained after cutting.

[0036] Example 2: This embodiment provides a highly elastic insulating self-fusing tape and its preparation method. The difference between the raw materials and those in Example 1 is that the weight of butyl rubber is replaced with 80 parts, while the other steps are the same.

[0037] Example 3: This embodiment provides a highly elastic insulating self-fusing tape and its preparation method. The difference between the raw materials and those in Example 1 is that the weight of butyl rubber is replaced with 100 parts, while the other steps are the same.

[0038] Example 4: This embodiment provides a highly elastic insulating self-fusing tape and its preparation method. The difference between the raw materials and those in Example 1 is that the weight of butyl rubber is replaced with 120 parts, while the other steps are the same.

[0039] Example 5: This embodiment provides a highly elastic insulating self-fusing tape and its preparation method. The difference between the raw materials and those in Example 3 is that the weight of polyolefin elastomer (POE) is replaced with 20 parts, while the other steps are the same.

[0040] The high-elasticity insulating self-fusing tape of this embodiment is prepared using the raw materials shown in Table 2 by weight: Table 2:

[0041] The preparation method of the above-mentioned highly elastic self-fusing insulating tape includes the following steps: According to the above weight proportions, the raw materials are put into the internal mixer and mixed at 150°C for 30 minutes to make them uniform. After discharge, the material is cold-fed to the calender, where the temperature of the calender is set at 130°C. After extrusion and calendering, the self-adhesive insulating tape is obtained after cutting.

[0042] Example 6: This embodiment provides a highly elastic insulating self-fusing tape and its preparation method. The difference between the raw materials and those in Example 5 is that the weight of polyolefin elastomer (POE) is replaced with 60 parts, while the other steps are the same.

[0043] Example 7: This embodiment provides a highly elastic insulating self-fusing tape and its preparation method. The difference between the raw materials and those in Example 5 is that the weight of polyolefin elastomer (POE) is replaced with 80 parts, while the other steps are the same.

[0044] Example 8: This embodiment provides a highly elastic insulating self-fusing tape and its preparation method. The difference between the raw materials and those in Example 3 is that high-density polyethylene (HDPE) is replaced with an equal amount of linear low-density polyethylene (LLDPE), while the other steps are the same.

[0045] The high-elasticity insulating self-fusing tape of this embodiment is prepared using the raw materials shown in Table 3 by weight: Table 3:

[0046] The linear low-density polyethylene (LLDPE) was purchased from Sinopec.

[0047] The preparation method of the above-mentioned highly elastic self-fusing insulating tape includes the following steps: According to the above weight proportions, the raw materials are put into the internal mixer and mixed at 150°C for 30 minutes to make them uniform. After discharge, the material is cold-fed to the calender, where the temperature of the calender is set at 130°C. After extrusion and calendering, the self-adhesive insulating tape is obtained after cutting.

[0048] Example 9: This embodiment provides a highly elastic insulating self-fusing tape and its preparation method. The difference between the raw materials and those in Example 3 is that high-density polyethylene (HDPE) is replaced with an equal amount of low-density polyethylene (LDPE), while the other steps are the same.

[0049] The high-elasticity insulating self-fusing tape of this embodiment is prepared using the raw materials shown in Table 4 by weight: Table 4:

[0050] Low-density polyethylene (LDPE) was purchased from Sinopec.

[0051] The preparation method of the above-mentioned highly elastic self-fusing insulating tape includes the following steps: According to the above weight proportions, the raw materials are put into the internal mixer and mixed at 130°C for 30 minutes to make them uniform. After discharge, the material is cold-fed to the calender, where the temperature of the calender is set at 130°C. After extrusion and calendering, the self-adhesive insulating tape is obtained after cutting.

[0052] Example 10: This embodiment provides a highly elastic insulating self-fusing tape and its preparation method. The difference between this preparation method and that of Embodiment 1 is that the mixing temperature is adjusted to 110°C, while the rest are the same.

[0053] The raw materials for preparing the self-fusing insulating tape in this embodiment, by weight, are shown in Table 5: Table 5:

[0054] The preparation method of the above-mentioned highly elastic self-fusing insulating tape includes the following steps: According to the above-mentioned weight proportions, the raw materials are put into the internal mixer and mixed at 110°C for 30 minutes to make them uniform. After discharge, the material is cold-fed to the calender, where the temperature of the calender is set at 130°C. After extrusion and calendering, the self-adhesive insulating tape is obtained after cutting.

[0055] Example 11: This embodiment provides a highly elastic insulating self-fusing tape and its preparation method. The difference between this preparation method and that of Embodiment 10 is that the mixing temperature is adjusted to 150°C, while the rest are the same.

[0056] Example 12: This embodiment provides a highly elastic insulating self-fusing tape and its preparation method. The difference between this preparation method and that of Embodiment 10 is that the mixing temperature is adjusted to 170°C, while the rest are the same.

[0057] Comparative Example 1: This comparative example provides an insulating self-fusing tape and its preparation method. The difference between the raw materials and those in Example 3 is that polyolefin elastomer POE is not added, while the other steps are the same.

[0058] The raw materials for preparing the self-fusing insulating tape of this comparative example, by weight, are shown in Table 6: Table 6:

[0059] The preparation method of the above-mentioned self-fusing insulating tape includes the following steps: According to the above weight proportions, the raw materials are put into the internal mixer and mixed at 130°C for 30 minutes to make them uniform. After discharge, the material is cold-fed to the calender, where the temperature of the calender is set at 130°C. After extrusion and calendering, the self-adhesive insulating tape is obtained after cutting.

[0060] Comparative Example 2: This comparative example provides an insulating self-fusing tape and its preparation method. The difference between the raw materials and those in Example 3 is that the polyolefin elastomer POE is replaced with natural rubber, while the other steps are the same.

[0061] The raw materials for preparing the self-fusing insulating tape of this comparative example, by weight, are shown in Table 7: Table 7:

[0062] The preparation method of the above-mentioned self-fusing insulating tape includes the following steps: According to the above weight proportions, the raw materials are put into the internal mixer and mixed at 130°C for 30 minutes to make them uniform. After discharge, the material is cold-fed to the calender, where the temperature of the calender is set at 130°C. After extrusion and calendering, the self-adhesive insulating tape is obtained after cutting.

[0063] Comparative Example 3: This comparative example provides an insulating self-fusing tape and its preparation method. The difference between the raw materials and those in Example 3 is that the polyolefin elastomer POE is replaced with natural rubber, and the high-density polyethylene (HDPE) is replaced with low-density polyethylene (LDPE). The remaining steps are the same.

[0064] The raw materials for preparing the self-fusing insulating tape of this comparative example, by weight, are shown in Table 8: Table 8:

[0065] The preparation method of the above-mentioned self-fusing insulating tape includes the following steps: According to the above weight proportions, the raw materials are put into the internal mixer and mixed at 130°C for 30 minutes to make them uniform. After discharge, the material is cold-fed to the calender, where the temperature of the calender is set at 130°C. After extrusion and calendering, the self-adhesive insulating tape is obtained after cutting.

[0066] Comparative Example 4: This comparative example provides an insulating self-fusing tape and its preparation method. The difference between the raw materials and those in Example 3 is that the polyolefin elastomer POE is replaced with a polyolefin elastomer (ethylene-butene copolymer, C4 POE), while the other steps are the same.

[0067] The raw materials for preparing the self-fusing insulating tape of this comparative example, by weight, are shown in Table 9: Table 9:

[0068] The polyolefin elastomer (C4 POE) is an ethylene-butene copolymer with a melt index of 0.1 g / min and a density of 0.96 g / cm³. 3 Purchased from Dushanzi Petrochemical.

[0069] The preparation method of the above-mentioned self-fusing insulating tape includes the following steps: According to the above weight proportions, the raw materials are put into the internal mixer and mixed at 130°C for 30 minutes to make them uniform. After discharge, the material is cold-fed to the calender, where the temperature of the calender is set at 130°C. After extrusion and calendering, the self-adhesive insulating tape is obtained after cutting.

[0070] Comparative Example 5: This comparative example provides an insulating self-fusing tape and its preparation method. The difference between the raw materials and those in Example 3 is that the polyolefin elastomer POE is replaced with a polyolefin elastomer (ethylene-hexene copolymer, C6 POE), while the other steps are the same.

[0071] The raw materials for preparing the self-fusing insulating tape of this comparative example, by weight, are shown in Table 10: Table 10:

[0072] The polyolefin elastomer (C6 POE) is an ethylene-hexene copolymer with a melt index of 0.3 g / min and a density of 0.92 g / cm³. 3 Purchased from Mitsui Chemicals.

[0073] The preparation method of the above-mentioned self-fusing insulating tape includes the following steps: According to the above weight proportions, the raw materials are put into the internal mixer and mixed at 130°C for 30 minutes to make them uniform. After discharge, the material is cold-fed to the calender, where the temperature of the calender is set at 130°C. After extrusion and calendering, the self-adhesive insulating tape is obtained after cutting.

[0074] Test Example 1: Mechanical Properties and Heat Resistance Testing This test example examines the tensile strength, elongation at break, self-adhesion, and heat resistance of the insulating self-adhesive tapes (approximately 0.65 mm thick) prepared in Examples 1-12 and Comparative Examples 1-5. The specific testing methods are as follows: (1) The tensile strength and elongation at break tests shall be conducted in accordance with GB / T 528-2009 standard, wherein the test temperature for tensile strength is 23℃; (2) The self-adhesion, heat stress cracking resistance and heat resistance tests shall be conducted in accordance with the standard JB / T 6464-2006 (Appendix C). The self-adhesion test time is 24 h, the heat stress cracking test temperature is 130℃, and the heat resistance test is performed after being treated at 130℃ for 168 h. The tape is considered qualified if it does not crack, sag, craze, deform, change color, or have bubbles on the surface.

[0075] The test results are shown in Table 11.

[0076] Table 11:

[0077] The above results show that the highly elastic insulating self-fusing tape prepared by this invention has excellent tensile strength and elongation at break, and its self-adhesion is satisfactory, without any loosening. Furthermore, the highly elastic insulating self-fusing tape of this invention also has excellent heat resistance; after being treated at 130°C for 168 hours, the tape does not crack, sag, craze, deform, or discolor, and its surface is free of bubbles, demonstrating excellent application prospects.

[0078] Compared to Example 3, Comparative Example 1 did not add polyolefin elastomer (i.e., ethylene-octene copolymer), and Comparative Example 2 replaced the ethylene-octene copolymer with an equal amount of natural rubber. The results showed a significant decrease in tensile strength and heat resistance. This invention introduces a polyolefin elastomer (i.e., ethylene-octene copolymer) into a blend with butyl rubber, etc. The soft chain coil structure and crystalline ethylene chains of the ethylene-octene copolymer act as physical crosslinking points, forming a strong network structure. These physical crosslinking points enhance the overall strength of the blend, significantly improving its tensile strength. Simultaneously, this crystalline physical crosslinking also improves the stability and high elasticity of the insulating self-adhesive tape during use. Furthermore, the introduction of the ethylene-octene copolymer provides the rubber with good processing performance and dispersibility. This not only solves the processing performance problem at high temperatures, greatly reducing processing conditions, but also improves the mechanical properties of the insulating self-adhesive tape under high and low temperature and humid environments.

[0079] Compared with Example 3, Comparative Example 4 replaced the ethylene-octene copolymer with the ethylene-butene copolymer, and Comparative Example 5 replaced the ethylene-octene copolymer with the ethylene-hexene copolymer. The results showed that the heat resistance was significantly reduced, which is presumably because the short-chain copolymer has low crosslinking efficiency and insufficient network density, resulting in easy deformation at high temperature.

[0080] Test Example 2: Electrical Correlation Performance Test This test examines the breakdown strength, volume resistivity, dielectric loss tangent, and dielectric constant of the insulating self-adhesive tapes prepared in Examples 1-12 and Comparative Examples 1-5. The specific testing methods are as follows: (1) The breakdown strength test shall be conducted in accordance with GB / T 1695-2005 standard; (2) Volume resistivity testing shall be conducted in accordance with GB / T 1692-2008 standard; (3) The dielectric loss tangent and dielectric constant are determined with reference to GB / T 1693-2007 standard.

[0081] The test results are shown in Table 12.

[0082] Table 12:

[0083] The above results show that the insulating self-adhesive tape prepared by the method of the present invention has excellent electrical properties, including a breakdown strength ≥34 kV / mm and a volume resistivity ≥2.86×10⁻⁶. 15 The breakdown strength and volume resistivity decrease to varying degrees when the ethylene-octene copolymer is replaced, which is not conducive to improving insulation performance.

[0084] In summary, this invention provides an insulating self-fusing tape, its preparation method, and its application. In the insulating self-adhesive tape formulation system of this invention, ethylene-octene copolymer is used as the polyolefin elastomer (POE). The introduction of ethylene-octene copolymer not only provides reliable physical cross-linking for the tape, thereby improving its mechanical property stability during use, but also helps to improve the processing performance and electrical properties (such as volume resistivity) of the insulating self-adhesive tape. During the use of the tape, due to the physical cross-linking effect of the long-branched chains, it can still tightly adhere to the shielding layer and insulation layer even at low temperatures (such as -40℃), without forming air trappings, which helps to ensure good stability and improve the service life of cable accessories.

[0085] The embodiments of the present invention have been described in detail above. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention. Furthermore, the embodiments of the present invention and the features thereof can be combined with each other unless otherwise specified.

Claims

1. An insulating self-fusing tape, characterized in that, The raw materials for preparation, by weight, include the following components: Butyl rubber 20-150 parts, polyolefin elastomer 20-100 parts, polyisobutylene 10-40 parts, polyethylene 15-40 parts, filler 200-300 parts, tackifier 10-50 parts and plasticizer 15-50 parts; The polyolefin elastomer is an ethylene-octene copolymer.

2. The insulating self-fusing tape according to claim 1, characterized in that, The melt flow index of the ethylene-octene copolymer is 0.4~0.6 g / min; And / or, the density of the ethylene-octene copolymer is 0.8~0.9 g / cm³. 3 .

3. The insulating self-fusing tape according to claim 1, characterized in that, The polyethylene is selected from at least one or a combination of high-density polyethylene, linear low-density polyethylene, or low-density polyethylene.

4. The insulating self-fusing tape according to claim 1, characterized in that, The filler is selected from one or a combination of calcium carbonate, carbon black, mica powder, and calcined kaolin. And / or, the tackifier is selected from one or a combination of polyisobutylene, coumarone resin and petroleum resin with a molecular weight of 1300 to 2400. And / or, the plasticizer is selected from one or more combinations of leucocyclohexane oil, diisononyl phthalate, and epoxidized soybean oil.

5. The insulating self-fusing tape according to any one of claims 1 to 4, characterized in that, The raw materials for preparing the self-fluxing insulating tape also include at least one of antioxidants, lubricants, and dispersants.

6. The insulating self-fusing tape according to claim 5, characterized in that, The antioxidant is selected from one or more of pentaerythritol tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate], butylated hydroxytoluene, N-isopropyl-N'-phenyl-p-phenylenediamine, and 2,2,4-trimethyl-1,2-dihydroquinoline polymer. And / or, the lubricant includes stearic acid.

7. The insulating self-fusing tape according to claim 5, characterized in that, The raw materials for preparation, by weight, include the following components: The ingredients include 60-120 parts butyl rubber, 40-80 parts polyolefin elastomer, 15-40 parts polyisobutylene, 15-40 parts polyethylene, 200-300 parts filler, 10-20 parts tackifier, 15-50 parts plasticizer, 1-5 parts antioxidant, and 1-5 parts lubricant.

8. A method for preparing an insulating self-fusing adhesive tape as described in any one of claims 1 to 7, characterized in that, include: The raw materials are mixed and then extruded to obtain the final product.

9. The preparation method according to claim 8, characterized in that, The reaction temperature for mixing is 100-180℃; And / or, the mixing time is 20-60 min.

10. The use of the insulating self-fusing tape according to any one of claims 1 to 7 or the preparation method according to any one of claims 7-8 in the preparation of insulating materials.

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