Flame-retardant high-temperature-resistant fluorescent warning expressway cable protection rubber strip and preparation method

Abstract

The invention discloses a flame-retardant high-temperature-resistant fluorescent warning expressway cable protection rubber strip and a preparation method thereof. The adhesive tape structurally comprises a silicon dioxide aerogel coating flame-retardant layer, a grid reinforced flame-retardant fluorescent aerogel fiber composite layer and a white matter expansion layer in sequence from outside to inside. The silicon dioxide aerogel coating is used as the outermost layer and provides excellent flame retardant property; the fiber aerogel fluorescent felt layer in the middle enhances the mechanical stability, fire resistance and luminous performance at night of the whole structure; the white matter expansion layer on the inner layer can rapidly expand when meeting fire, gaps between the structures are effectively filled, and the heat bridge effect is prevented. By means of the well-layered structural design, the fireproof adhesive tape provides efficient fireproof protection and night safety warning at the same time, and installation simplicity and material application universality are guaranteed. In addition, the preparation method relates to specific combination and processing steps, so that perfect combination of all layers of materials is ensured, and the fireproof performance and physical properties of the material are optimized.

Description

Technical Field

[0001] The present invention relates to the field of fireproof materials, in particular to a flame-retardant and high-temperature resistant fluorescent warning highway cable protective rubber strip and a preparation method thereof, which is suitable for fire protection in the construction, aviation, automobile and other industries. Background Art

[0002] With the development of industry and technology, the demand for fireproofing materials is growing. The rapid increase in infrastructure construction and international cooperation projects, encompassing a wide range of industrial, transportation, and construction sectors, has created an urgent need for high-performance, high-safety fireproofing materials. While traditional fireproofing materials provide basic fire protection, they often struggle to meet higher standards in terms of flame retardancy, thermal insulation, mechanical stability, safety functionality, and environmental performance. Furthermore, many traditional materials are complex to install and difficult to store and transport, limiting their application. Rapid, economical, and environmentally friendly fireproofing solutions are urgently needed.

[0003] Currently, research on fireproof materials at home and abroad mainly focuses on the following aspects: First, improving flame retardant properties through nano-modification technology, such as using nano-oxides or layered double hydroxides (LDH) to improve thermal stability; second, using high-performance composite materials to improve mechanical strength and weather resistance, such as using organic-inorganic composite technology to enhance the toughness and impact resistance of materials; third, optimizing material structure and improving the stability of materials in high-temperature environments. However, most of these studies focus on improving flame retardant properties and fail to effectively take into account stability in high-temperature environments, construction convenience, and long-term safety. Especially in special application scenarios such as highway cable protection, existing materials still have the following limitations:

[0004] Lack of fluorescent warning function: Existing fireproof materials mainly focus on flame retardancy and mechanical properties, but lack active warning capabilities at night or in low-visibility environments, affecting construction safety and use effects.

[0005] Insufficient high temperature resistance: Many fireproof materials are prone to decomposition or performance degradation in high temperature environments, making it difficult to meet the long-term use requirements in harsh outdoor conditions such as highways.

[0006] Inconvenient construction and high maintenance costs: Some flame retardant materials require complex construction processes and high installation and maintenance costs, which are not conducive to large-scale promotion and application.

[0007] Unable to effectively avoid the thermal bridge effect: Traditional fireproofing materials may form thermal bridges in high-temperature environments, causing local heat concentration, affecting the overall fireproofing effect, and even increasing the risk of structural damage.

[0008] By combining fluorescent warning, high temperature resistance and flame retardant properties with expansion strips, the present invention fills the technical gap in the field of highway cable protection using existing fireproof materials, and provides a safer, more efficient and environmentally friendly fire protection solution for large-scale projects. Summary of the Invention

[0009] One of the purposes of the present invention is to provide a flame-retardant and high-temperature resistant fluorescent warning highway cable protective strip, which has excellent flame retardant and heat-insulating properties, can withstand high temperatures, has an extremely low thermal conductivity coefficient, can reach Class A combustion grade, and has fluorescent properties, which serves as a warning at night.

[0010] The second purpose of the present invention is to provide a method for preparing a flame-retardant and high-temperature resistant fluorescent warning highway cable protective strip. The technical process is simple and can ensure the quality of the obtained product is stable and reliable.

[0011] The third object of the present invention is to provide a fireproof product made using the above-mentioned preparation technology of the flame-retardant and high-temperature resistant fluorescent warning highway cable protective strip.

[0012] To achieve the above object, the present invention adopts the following technical solutions:

[0013] A flame-retardant and high-temperature-resistant fluorescent warning highway cable protective rubber strip, comprising the following structure:

[0014] Outer layer: Silica aerogel coating flame retardant layer, which provides effective flame retardant protection by utilizing its low thermal conductivity and good fire resistance;

[0015] Middle layer: grid-reinforced flame-retardant fluorescent aerogel fiber composite layer. This layer improves the structural stability and flexibility of the material, enhances the overall thermal insulation and flame retardancy, and because the fluorescent components in it have fluorescent properties, it enhances its safety performance at night.

[0016] Inner layer: white expansion layer, made of white expansion rubber strip, which can expand rapidly when exposed to high temperature, effectively blocking the heat source, preventing flame penetration, and preventing thermal bridge effect.

[0017] The outer silica aerogel fire-retardant coating of the present invention preferably has a thickness of 0.1-1 mm. This layer not only provides excellent flame retardancy but also, due to its extremely low weight and excellent physical stability, places minimal burden on the overall structure. Furthermore, the coating layer exhibits excellent chemical and aging resistance, maintaining its performance in harsh environments and extending the material's service life.

[0018] Ingredients: Prepare the raw materials required for each layer, including silica aerogel for the flame-retardant coating of the outer layer, grid-reinforced flame-retardant fluorescent aerogel fiber composite layer, and white matter expansion material for the inner layer;

[0019] Preparation of each layer of materials: outer layer (silica aerogel flame retardant coating): by mixing silica sol with an appropriate catalyst, then performing gelation treatment, and finally using freeze-drying method to obtain porous silica aerogel, which is coated on a mesh cloth to form a fire-retardant coating; middle layer (grid-reinforced flame-retardant fluorescent aerogel fiber composite layer): by mixing a fiber precursor and an appropriate chemical catalyst to form a sol and adding fluorescent powder to mix evenly, and then forming fluorescent fibers through spinning technology, and then filling, impregnation and freeze-drying to produce a grid-reinforced flame-retardant fluorescent aerogel fiber composite layer; inner layer (white matter expansion layer): the white matter expansion powder is mixed with an adhesive, and an expansion strip is formed by extrusion or molding technology.

[0020] Lamination and Forming: The prepared outer layer, middle layer, and inner layer are laminated in sequence. Appropriate bonding techniques are used to ensure a strong bond between the layers, and hot or cold pressing techniques are used to ensure the integrity and sealing of the laminated structure.

[0021] Cutting and forming: Cutting the laminated materials into the required size and shape to meet specific application needs, such as fire door filling, fire partition panels, etc.

[0022] As a preferred embodiment of the present invention, the preparation of the grid-reinforced flame-retardant fluorescent aerogel fiber composite layer comprises the following steps:

[0023] Spinning: Prepare a fiber precursor sol according to the formula, add the prepared phosphor into it, mix thoroughly to obtain a fluorescent fiber precursor sol, and then make fluorescent fiber through a spinning process;

[0024] Ingredients: According to the formula, the fluorescent fibers, glass microspheres, resin binder, and aerogel precursor solution are mixed evenly to obtain a composite material;

[0025] Filling: Filling the composite material with flame-retardant three-dimensional spacer fabric to obtain a grid-reinforced filled composite material;

[0026] Aging: Soak the grid-reinforced filled composite material in ethanol for 24-48 hours;

[0027] Drying: The aged material is dried using freeze-drying technology at a temperature of -50°C for 24 hours. This method retains the porous structure of the material while removing moisture, avoiding structural damage caused by traditional drying methods. This results in a grid-reinforced flame-retardant fluorescent aerogel fiber composite material. In the present invention, the inner white matter expansion layer is prepared using a high-temperature expansion material and an adhesive, comprising 50-70% expanded graphite, 20-30% inorganic filler, and 10-20% adhesive. This layer can rapidly expand several times its original volume in the event of a fire, effectively filling the gaps between structures, preventing the formation of thermal bridges, and effectively blocking the spread of flames and heat energy.

[0028] As a preferred solution of the present invention, the lamination and forming steps further include a high-temperature heat treatment process, which not only further improves the fire resistance of the material, but also optimizes the physical and chemical stability of the material.

[0029] As a preferred solution of the present invention, the formed fluorescent aerogel composite white matter expansion strip with flame retardant coating is subjected to flatness inspection and pretreatment to ensure that its surface has no bulges, depressions or other defects. The guiding and winding device finally forms a tape-shaped roll with neat appearance and tightness, and the outer diameter and inner diameter of the roll can be accurately set according to actual needs.

[0030] Through this hierarchical structural design and preparation method, the fireproof material of the present invention not only provides efficient fire protection, but also ensures ease of installation, tolerance to human errors and wide application potential, and is particularly suitable for buildings and vehicles requiring high safety standards.

[0031] Beneficial Effects: This invention addresses the shortcomings of existing fireproof materials and proposes a new material that is flame retardant, high temperature resistant, fluorescent warning, and easy to construct. Its core advantages are as follows:

[0032] Fluorescent warning function: Fluorescent components are introduced into the material system to enable it to self-luminesce in low-light environments, improving visibility, enhancing safety at night or in severe weather conditions, reducing the need for additional lighting, and achieving energy-saving effects.

[0033] Excellent high temperature resistance: Optimized base material and flame retardant formula enables the rubber strip to maintain stable mechanical properties and flame retardant effect in high temperature environment, ensuring long-term safe use under extreme conditions.

[0034] High-efficiency flame retardant system: Adopts synergistic flame retardant technology to improve flame retardant efficiency while enhancing the weather resistance of the material, making it suitable for long-term outdoor use.

[0035] Easy construction and suitable for large-scale applications: The material design takes into account flexibility and adhesion, which can be quickly installed, reducing construction time and maintenance costs, and meeting the needs of efficient construction of infrastructure such as highways.

[0036] Expanding rubber strip structure to avoid thermal bridge effect: The present invention innovatively introduces expanding rubber strips, which can form a thermal insulation layer in a high temperature environment, effectively blocking heat transfer, reducing the risk of local heat concentration, improving the overall fire resistance, and ensuring the stability and safety of highway cable protection. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 A diagram illustrating the preparation technology of a flame-retardant and high-temperature-resistant fluorescent warning highway cable protective rubber strip provided by an embodiment of the present invention;

[0038] In the figure: 1. Silica aerogel coating flame retardant layer 2. Grid-reinforced flame retardant fluorescent aerogel fiber composite layer 3. Intumescent layer;

[0039] Figure 2 The invention provides a tape-shaped roll product of a flame-retardant and high-temperature-resistant fluorescent warning highway cable protective tape preparation technology;

[0040] Figure 3 A cylindrical coating toughness test diagram of a tape-shaped roll product of a flame-retardant and high-temperature resistant fluorescent warning highway cable protective tape preparation technology provided by an embodiment of the present invention.

[0041] Figure 4 A diagram showing the high-temperature stability test of the grid-reinforced flame-retardant fluorescent aerogel fiber composite layer provided by an embodiment of the present invention;

[0042] Figure 5 This is a diagram showing the thermal insulation performance test of the grid-reinforced flame-retardant fluorescent aerogel fiber composite layer provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0043] Example 1

[0044] A flame-retardant and high-temperature-resistant fluorescent warning highway cable protective rubber strip is prepared according to the following method:

[0045] Preparation of a 1 mm thick grid-reinforced flame-retardant fluorescent aerogel fiber composite layer:

[0046] Ingredients: First, prepare the fluorescent fiber precursor sol by mixing appropriate amounts of aluminum sol and acidic silica sol in a ratio of 3:1, ageing for a period of time, evaporating 50% of the water, adding 1% by mass of PVA to make a sol, and at the same time, nitrify a certain proportion of rare earth oxide materials such as Y2O3, Yb2O3 and Er2O3 to dissolve the rare earth oxides to form a clear and transparent solution. Continue heating to remove excess nitric acid, then cool to room temperature to obtain a mixed rare earth nitrate and add it to the sol to mix evenly.

[0047] Spinning: Fluorescent mullite fiber is produced by air-spinning the fluorescent mullite precursor sol. This process involves spinning the sol into filaments through air-spinning.

[0048] Heat treatment: The blow-spun fluorescent mullite fiber is subjected to high-temperature calcination to completely convert it into mullite. During the high-temperature heat treatment, the heating rate is 2°C / min, the calcination temperature is 1000-1500°C, and the holding time is 1 hour.

[0049] Ingredients: Mix TEOS, ethanol, water and catalyst, stir until uniform sol, add flame retardant aluminum hydroxide and ultrasonically disperse, add fluorescent fiber and glass microspheres in sequence, and optionally add a small amount of resin binder, mix well to obtain a composite material.

[0050] Filling: The composite material is filled with 1 mm thick glass fiber mesh cloth to obtain a mesh-reinforced filled composite material.

[0051] Aging: Soak the grid-reinforced filled composite material in ethanol for 24-48 hours.

[0052] Drying: The aged material was dried using freeze-drying technology at a drying temperature of -50°C for 24 hours, effectively retaining the porous structure of the material while removing moisture, avoiding structural damage that may be caused by the traditional drying process. Finally, a grid-reinforced flame-retardant fluorescent aerogel fiber composite layer with a thickness of 1 mm was obtained.

[0053] Preparation of inner layer: Mix the white matter expansion powder with the adhesive and form a 1 cm thick expansion strip by extrusion or molding technology.

[0054] Lamination and Forming: The prepared middle and inner layers are laminated in sequence. Appropriate bonding techniques are used to ensure a firm bond between the layers. Hot or cold pressing is used to ensure the integrity and sealing of the laminated structure. The outer layer is then coated with a 0.1mm thick silica aerogel flame retardant coating.

[0055] Cutting and Forming: The laminated materials are cut into the required size and shape, and then subjected to flatness inspection and pre-treatment to ensure that the surface is free of ridges, depressions, and other defects. The final product is formed into a neat and compact tape-like roll through the guiding and winding devices.

[0056] Example 2

[0057] A flame-retardant and high-temperature-resistant fluorescent warning highway cable protective rubber strip is prepared according to the following method:

[0058] Preparation of a 5 mm thick grid-reinforced flame-retardant fluorescent aerogel fiber composite layer:

[0059] Ingredients: First, prepare the fluorescent fiber precursor sol by mixing appropriate amounts of aluminum sol and acidic silica sol in a ratio of 3:1, ageing for a period of time, evaporating 50% of the water, adding PVA to make a sol, and at the same time nitrifying a certain proportion of rare earth oxide materials such as Y2O3, Yb2O3 and Er2O3 to dissolve the rare earth oxides to form a clear and transparent solution. Continue heating to remove excess nitric acid, then cool to room temperature to obtain a mixed rare earth nitrate and add it to the sol to mix evenly.

[0060] Spinning: Fluorescent mullite fiber is produced by air-spinning the fluorescent mullite precursor sol. This process involves spinning the sol through an air stream to form filaments.

[0061] Heat treatment: The blow-spun fluorescent mullite fiber is subjected to high-temperature calcination to completely convert it into mullite. During the high-temperature heat treatment, the heating rate is 2°C / min, the calcination temperature is 1000-1500°C, and the holding time is 1 hour.

[0062] Ingredients: Mix TEOS, ethanol, water and catalyst, stir until uniform sol, add flame retardant aluminum hydroxide and ultrasonically disperse, add fluorescent fiber and glass microspheres in sequence, and optionally add a small amount of resin binder, mix well to obtain a composite material.

[0063] Filling: The composite material is filled with a glass fiber mesh cloth having a thickness of 5 mm to obtain a mesh-reinforced filled composite material.

[0064] Aging: Soak the grid-reinforced filled composite material in ethanol for 24-48 hours.

[0065] Drying: The aged material was dried using freeze-drying technology at a drying temperature of -50°C for 24 hours, effectively retaining the porous structure of the material while removing moisture, avoiding structural damage that may be caused by the traditional drying process. Finally, a 5mm thick grid-reinforced flame-retardant fluorescent aerogel fiber composite layer was obtained.

[0066] Preparation of inner layer: Mix the white matter expansion powder with the adhesive and form a 1 cm thick expansion strip by extrusion or molding technology.

[0067] Lamination and Forming: The prepared middle and inner layers are laminated in sequence. Appropriate bonding techniques are used to ensure a firm bond between the layers. Hot or cold pressing is used to ensure the integrity and sealing of the laminated structure. The outer layer is then coated with a 0.1mm thick silica aerogel flame retardant coating.

[0068] Cutting and Forming: The laminated materials are cut into the required size and shape, and then subjected to flatness inspection and pre-treatment to ensure that the surface is free of ridges, depressions, and other defects. The final product is formed into a neat and compact tape-like roll through the guiding and winding devices.

[0069] Example 3

[0070] A flame-retardant and high-temperature-resistant fluorescent warning highway cable protective rubber strip is prepared according to the following method:

[0071] Preparation of a 10 mm thick grid-reinforced flame-retardant fluorescent aerogel fiber composite layer:

[0072] Ingredients: First, prepare the fluorescent fiber precursor sol by mixing appropriate amounts of aluminum sol and acidic silica sol in a ratio of 3:1, ageing for a period of time, evaporating 50% of the water, adding PVA to make a sol, and at the same time nitrifying a certain proportion of rare earth oxide materials such as Y2O3, Yb2O3 and Er2O3 to dissolve the rare earth oxides to form a clear and transparent solution. Continue heating to remove excess nitric acid, then cool to room temperature to obtain a mixed rare earth nitrate and add it to the sol to mix evenly.

[0073] Spinning: Fluorescent mullite fiber is produced by air-spinning the fluorescent mullite precursor sol. This process involves spinning the sol through an air stream to form filaments.

[0074] Heat treatment: The fluorescent mullite fiber obtained by blow spinning is calcined at high temperature to completely transform it into mullite. During the high temperature heat treatment, the heating rate is 2°C / min, the calcination temperature is 1000-1500°C, and the holding time is 1 hour;

[0075] Ingredients: Mix TEOS, ethanol, water and catalyst, stir until uniform sol, add flame retardant aluminum hydroxide and ultrasonically disperse, add fluorescent fiber and glass microspheres in sequence, and optionally add a small amount of resin binder, mix well to obtain a composite material.

[0076] Filling: The composite material is filled with a glass fiber mesh cloth having a thickness of 10 mm to obtain a mesh-reinforced filled composite material.

[0077] Aging: Soak the grid-reinforced filled composite material in ethanol for 24-48 hours.

[0078] Drying: The aged material was dried using freeze-drying technology at a drying temperature of -50°C for 24 hours. This effectively retained the porous structure of the material while removing moisture, avoiding structural damage that may be caused by the traditional drying process. Finally, a 10mm thick grid-reinforced flame-retardant fluorescent aerogel fiber composite layer was obtained.

[0079] Preparation of inner layer: Mix the white matter expansion powder with the adhesive and form a 1 cm thick expansion strip by extrusion or molding technology.

[0080] Lamination and Forming: The prepared middle and inner layers are laminated in sequence. Appropriate bonding techniques are used to ensure a firm bond between the layers. Hot or cold pressing is used to ensure the integrity and sealing of the laminated structure. The outer layer is then coated with a 0.1mm thick silica aerogel flame retardant coating.

[0081] Cutting and Forming: The laminated materials are cut into the required size and shape, and then subjected to flatness inspection and pre-treatment to ensure that the surface is free of ridges, depressions, and other defects. The final product is formed into a neat and compact tape-like roll through the guiding and winding devices.

[0082] Table 1: Thickness of flame-retardant and high-temperature-resistant fluorescent warning highway cable protective rubber strip structure in Example 1-3

[0083]

[0084] After completing the corresponding steps, the relevant properties of the fireproof materials of Examples 1-3 were measured (the test method was carried out in accordance with the "Nanoporous Aerogel Composite Insulation Products" (GB / T 34336-2017)). The measurement indicators and results are shown in Tables 2-4, respectively.

[0085] Table 2 Parameter measurement result record table

[0086] Test items Example 1 Example 2 Example 3 bulk density <![CDATA[200kg / m 3 ]]> <![CDATA[180kg / m 3 ]]> <![CDATA[160kg / m 3 ]]> Breaking strength 263.2N / 25mm 250.4N / 25mm 240.4N / 25mm tensile strength 714kpa 589kpa 513kpa Thermal conductivity (room temperature) 0.0482W / (m·K) 0.0357W / (m·K) 0.0293W / (m·K) Combustion level A A A Flexibility level Flexibility Flexibility Flexibility

[0087] The fluorescence performance test of the grid-reinforced flame-retardant fluorescent aerogel fiber composite layer obtained in Example 3 was carried out using a fluorescence spectrophotometer with an excitation wavelength of 980 nm at room temperature. The results are as follows: the material shows upconversion luminescence under 980 nm infrared excitation, and in the red region of 500-542 nm and 542-688 nm (the main emission peak is 669 nm, from Er 3+ ion 4F9 / 2→4I15 / 2 transition), the maximum luminous intensity is 2.8cd / m 2 After stopping the excitation, the residual brightness at 10 minutes, 30 minutes, and 60 minutes were 0.98, 0.28, and 0.14 cd / m 2, showing good fluorescent warning performance and afterglow characteristics, meeting the night safety warning requirements.

[0088] Figure 3 A cylindrical coating toughness test was conducted on the tape-shaped roll product of the preparation technology of the flame-retardant and high-temperature resistant fluorescent warning highway cable protective rubber strip provided in Example 3 of the present invention. The structure was intact and no failure occurred.

[0089] Figure 4 A 10 mm thick grid-reinforced flame-retardant fluorescent aerogel fiber composite layer was treated with a butane torch at a temperature of 1300°C, and its surface morphology after 5 minutes showed no collapse or structural changes.

[0090] Figure 5 A 10 mm thick grid-reinforced flame-retardant fluorescent aerogel fiber composite layer was heated on an alcohol lamp at a temperature of approximately 700°C for 1 hour, and its upper surface temperature was always maintained below 250°C.

[0091] refer to Figure 4 and Figure 5 This material still has excellent thermal insulation performance at a high temperature of 1300°C, and its performance is relatively stable, not easy to fail, and has very strong fire resistance, making it suitable for use as a high-temperature thermal insulation material.

Claims

1. A flame retardant and high temperature resistant fluorescent warning highway cable protective rubber strip, characterized in that: From outside to inside, it includes: Silica aerogel coating flame retardant layer, thickness of 0.1-1 mm; A grid-reinforced flame-retardant fluorescent aerogel fiber composite layer with a thickness of 1-10 mm, comprising a composite material of fluorescent fibers, glass microspheres, and aerogel precursors; The white expansion layer comprises 50-70% of expanded graphite, 20-30% of inorganic filler and 10-20% of adhesive.

2. The adhesive strip according to claim 1, wherein: The flame retardant layer of the silica aerogel coating is prepared by mixing a filler, a thickener, a solvent and a dispersant, and is formed through low-speed stirring, high-speed stirring and filtering processes.

3. The adhesive strip according to claim 1, wherein: The grid-reinforced flame-retardant fluorescent aerogel fiber composite layer is prepared by the following steps: Spinning fluorescent fiber precursor sol and calcining at high temperature; The fluorescent fibers, glass microspheres, resin binder and aerogel precursor solution are mixed and filled into the three-dimensional spacer fabric; Soak in ethanol for 24-48 hours and then freeze-dry.

4. The adhesive strip according to claim 3, wherein: The fluorescent fiber precursor sol is prepared by mixing aluminum sol and acidic silica sol in a ratio of 3:1, adding PVA and phosphor, and undergoing nitration treatment to form a mixed rare earth nitrate solution.

5. The adhesive strip according to claim 1, wherein: The white expansion layer is formed by extrusion or molding technology, and expands to fill the structural gaps to block the thermal bridge effect when encountering fire.

6. A method for preparing the adhesive strip according to any one of claims 1 to 5, characterized in that: The following steps are involved: Preparation of flame retardant layer of silica aerogel coating; Preparation of grid-reinforced flame-retardant fluorescent aerogel fiber composite layer; preparing a white matter expansion layer; The flame retardant layer, the composite layer and the expansion layer are stacked and subjected to a heat pressing treatment at 100-200° C. for 10-30 minutes to form an integrated structure; The laminated materials are cut into the required size, tested for flatness and wound into shape.

7. The method according to claim 6, wherein: The preparation of the flame retardant layer comprises mixing fillers and solvents by stirring at a low speed, adding emulsion and film-forming aid by stirring at a high speed, and filtering to remove impurities.

8. The method according to claim 6, wherein: After hot pressing treatment, the bonding strength of each layer of the adhesive strip meets the breaking strength of 240.4-263.2N / 25mm and the tensile strength of 513-714kPa.

9. The method according to claim 6, wherein: The cut rubber strips are guided and wound into a tape-shaped roll with adjustable outer and inner diameters.

10. Application of the rubber strip according to claim 1 in highway cable protection, characterized in that: The rubber strip achieves stable protection and nighttime visibility in high temperature environments through the flame-retardant outer layer, the fluorescent warning middle layer and the expansion insulation inner layer.

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