Double-layer rubber and plastic plate with heat preservation and noise reduction functions

Abstract

The invention relates to the technical field of plates, and discloses a double-layer rubber and plastic plate with heat preservation and noise reduction functions, the double-layer rubber and plastic plate comprises a surface layer and an inner layer, fiber function additives are added into raw materials of the surface layer, the aerogel structure of the fiber function additives is utilized, the heat insulation effect on heat is achieved, sound waves are reflected, and the heat preservation and noise reduction functions are achieved. Therefore, good heat preservation and noise reduction effects are achieved. And secondly, the crosslinked tamarind gum contained in the aerogel structure can be used as a carbon source, and the nitrogen element and the phosphorus element contained in the functional bridging agent structure can be used as a gas source and an acid source respectively, so that an expanded carbon layer can be quickly formed on the surface layer of the plate when the rubber and plastic plate is burnt, and the burning cannot be continuously carried out, thereby effectively improving the flame retardant property of the rubber and plastic plate. In addition, the quartz fibers can efficiently exert the reinforcing effect of the quartz fibers, the mechanical strength of the plate is improved, and then the prepared rubber and plastic plate shows excellent comprehensive performance.

Description

Technical Field

[0001] The present invention relates to the technical field of plates, and in particular to a double-layer rubber-plastic plate with heat-insulating and noise-reducing functions. Background Art

[0002] Rubber-plastic sheeting is a closed-cell elastic material made primarily from synthetic rubber or plastic, through the addition of various additives and a process of high-temperature mixing, extrusion, or compression molding. Its lightweight, flexible, corrosion-resistant, and easy-to-install properties have led to its widespread application in construction, transportation, industrial equipment, and other fields. With the intensifying energy crisis and rising environmental awareness, the technological evolution of rubber-plastic sheeting is increasingly focused on multifunctionality. Traditional single-performance rubber-plastic sheeting is no longer able to meet the comprehensive safety, energy efficiency, and comfort requirements of modern engineering projects. The integration of flame retardancy, thermal insulation, and noise reduction has become a core goal of the industry's technological upgrades.

[0003] At present, functional modifications such as flame retardancy and heat insulation of rubber sheets are generally achieved by adding inorganic additives, such as magnesium hydroxide and hollow glass microspheres, to the rubber formula. However, there are major problems with the compatibility between the inorganic additives themselves and the rubber substrate, and a uniform dispersion effect cannot be formed. Therefore, a large addition amount is required to produce a significant modification effect, which has a serious negative impact on the mechanical strength of the rubber-plastic sheet. Based on this, the present invention provides a rubber-plastic sheet that can solve the problems existing in the prior art. Summary of the Invention

[0004] In order to solve the problems mentioned in the background technology, the purpose of the present invention is to provide a double-layer rubber-plastic plate with heat preservation and noise reduction functions.

[0005] The purpose of the present invention can be achieved through the following technical solutions: A double-layer rubber-plastic sheet with heat-insulating and noise-reducing functions, comprising a surface layer and an inner layer; The surface layer is made of the following raw materials in parts by weight: 25-35 parts of natural rubber, 5-10 parts of styrene-butadiene rubber, 10-20 parts of polyvinyl chloride, 1-2.5 parts of fiber functional additives, 5-10 parts of carbon black, 0.5-1.5 parts of antioxidant, 10-20 parts of foaming agent, 3-8 parts of dispersant, 3-5 parts of vulcanizing agent, 1-2 parts of vulcanizing accelerator; The inner layer is made of the following raw materials in parts by weight: 25-40 parts of butadiene rubber, 12-18 parts of polyvinyl chloride, 10-15 parts of foaming agent, 1-3 parts of lubricant, 0.5-1.5 parts of antioxidant, 5-10 parts of carbon black, 1-3 parts of stabilizer, 1-2 parts of dispersant, 3-5 parts of vulcanizing agent, and 1-2 parts of vulcanization aid.

[0006] As a further embodiment of the present invention, the method for preparing the double-layer rubber-plastic sheet comprises the following steps: The first step is to weigh the raw materials of the surface layer according to the weight parts, then add the natural rubber, styrene-butadiene rubber, polyvinyl chloride, fiber functional additives, carbon black, antioxidant, foaming agent and dispersant into the internal mixer, mix them to 140-160 ° C, discharge the glue, then pour them into the open mill, pass them through 2-3 times to produce sheets, control the thickness to be 5-10 mm, and then continue to put them into the open mill, after hot pressing the roller, continue to add the vulcanizing agent and vulcanizing accelerator, stir them evenly, and automatically turn the materials over. After 200-300 seconds, the materials are unloaded to form the surface layer rubber strips; The second step is to weigh the raw materials in the inner layer according to the weight parts, and then add the butadiene rubber, polyvinyl chloride, foaming agent, lubricant, antioxidant, carbon black, stabilizer and dispersant into the internal mixer and mix them. The material is discharged at 145-150 ° C, and then placed in the open mixer, thinly passed 2-3 times to produce a sheet with a thickness of 5-10 mm, and then transferred to the open mixer for secondary mixing. After the hot roller is pressed, the vulcanizing agent and vulcanizing accelerator are added, and after stirring, the material is automatically turned over and discharged after 200-300 seconds to form the inner layer rubber strip; The third step is to feed the surface rubber strip and the inner rubber strip into two extruders respectively, extrude through the same die head, control the extrusion temperature at 40-50°C and the die head temperature at 50-60°C, and form a semi-finished sheet material; The fourth step is to place the semi-finished sheet material in an oven with multiple drying tunnels for vulcanization and foaming. The temperatures of the multiple drying tunnels are controlled in sequence: section one 125±5°C, section two 130±5°C, section three 140±5°C, section four 150±5°C, section five 160±5°C, section six 170±5°C. After the foaming is completed, cool it down to obtain a double-layer rubber-plastic sheet material.

[0007] As a further embodiment of the present invention, the preparation method of the fiber functional additive comprises the following steps: Step S1, adding quartz fiber to toluene, and after uniform dispersion, adding a surface modifier and a catalyst to the formed dispersion, turning on the heating, gradually raising the temperature to 70-80°C, stirring continuously for 4-8 hours, stopping the heating, and discharging the material to obtain an organically modified quartz fiber; Step S2, adding the organically modified quartz fiber to a mixed solution of ethanol and purified water in a volume ratio of 1:1, dispersing until a uniform dispersion is formed, continuing to add tamarind gum and an alkaline hydroxide aqueous solution, and after the addition is completed, raising the temperature to 60-70°C, keeping warm for 2-4 hours, and then adding a functional bridging agent. After the addition is completed, the temperature is further raised to 70-80°C, stirring is continued for 6-9 hours, and heating is stopped. After cooling, the fiber is poured into a mold, allowed to stand to form a gel, and transferred to a freeze dryer for freeze drying to obtain a fiber functional additive.

[0008] As a further embodiment of the present invention, in step S1, the surface modifier is chloroethyl isocyanate or 3-chloropropyl isocyanate.

[0009] As a further embodiment of the present invention, in step S1, the catalyst is any one of octyltin mercaptan, dibutyltin dilaurate, stannous octoate or dibutyltin diacetate.

[0010] As a further embodiment of the present invention, in step S2, the alkaline hydroxide aqueous solution is a potassium hydroxide aqueous solution or a sodium hydroxide aqueous solution, with a mass fraction of 10-20%.

[0011] As a further embodiment of the present invention, in step S2, the preparation method of the functional bridging agent is: 5-bromopyrimidine-2-carboxylic acid and tetrahydrofuran are added to a reaction kettle, and stirring is started. After a uniform mixed liquid is formed, nitrogen is introduced for protection. Then, a condensing agent and a accelerator are added. After stirring at room temperature for 20-40 minutes, [(6-oxo-6H-dibenzo[C,E][1,2]oxaphosphorin-6-yl)methyl]succinic acid bis(2-hydroxyethyl) ester is added to the reaction kettle. After the addition is completed, the temperature is raised to 40-50°C and kept warm for 3-6 hours. The solvent is evaporated and the product is collected to obtain a functional bridging agent.

[0012] As a further embodiment of the present invention, the molar ratio of 5-bromopyrimidine-2-carboxylic acid to bis(2-hydroxyethyl)[(6-oxo-6H-dibenzo[C,E][1,2]oxaphosphorin-6-yl)methyl]succinate is 2:1.

[0013] As a further embodiment of the present invention, the condensing agent is dicyclohexylcarbodiimide or 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide; and the accelerator is 4-dimethylaminopyridine or N-hydroxysuccinimide.

[0014] In the above technical solution, a surface modifier is first used to modify the surface of the quartz fiber, and a halogen substituent is modified on the surface of the quartz fiber to obtain an organically modified quartz fiber. Then, under the catalysis of an alkaline hydroxide, the halogen substituent can further replace the hydroxyl group in the tamarind gum structure, thereby modifying the tamarind gum molecular chain on the surface of the quartz fiber. At the same time, a functional bridging agent containing two equivalents of halogen substituents in the structure is added to cross-link the tamarind gum molecular chain, thereby tightly coating the cross-linked tamarind gum on the surface of the quartz fiber. The cross-linked tamarind gum is then converted into an aerogel state through a freeze-drying process to obtain a fiber functional additive.

[0015] The functional bridging agent is prepared by using 5-bromopyrimidine-2-carboxylic acid and [(6-oxo-6H-dibenzo[C,E][1,2]oxaphosphorin-6-yl)methyl]succinic acid bis(2-hydroxyethyl) ester as reactants. The active carboxyl substituent and the hydroxyl substituent in each other's structure undergo a condensation reaction under the joint action of a condensing agent and a accelerator. By controlling the dosage ratio of the two, the obtained functional bridging agent structure can contain two equivalents of halogen substituents.

[0016] As a further embodiment of the present invention, the antioxidant is at least one of antioxidant 4020 or antioxidant MBT; the foaming agent is AC foaming agent; the vulcanizing agent is sulfur; the vulcanization aid is at least one of vulcanization accelerator PZ, vulcanization accelerator DPTT or vulcanization accelerator EZ; and the stabilizer is a calcium zinc stabilizer.

[0017] Beneficial effects of the present invention: The present invention prepares a fiber functional additive by coating aerogel on the surface of quartz fiber, and uses it as a surface additive for double-layer rubber-plastic sheet materials. First, the aerogel has a rich pore structure, and the presence of the pore structure can produce an excellent heat-insulating effect. The rich pore walls form an "infinitely long loose path" effect. At the same time, the presence of the pores can reflect sound waves, causing the sound energy to gradually decay, thereby producing an excellent thermal insulation and noise reduction effect. Secondly, the cross-linked tamarind gum contained in the aerogel structure can serve as a carbon source, and the functional bridging agent structure contains nitrogen and phosphorus elements, which can serve as a gas source and an acid source, respectively. When the rubber-plastic sheet material burns, an expanded carbon layer can be quickly formed on the surface of the sheet material, preventing the combustion from continuing, thereby effectively improving the flame retardant properties of the rubber-plastic sheet material. In addition, the quartz fiber can provide a skeletal support for the aerogel, preventing the collapse of the aerogel pores. Moreover, after surface modification, the quartz fiber can produce a good interface between the rubber-plastic matrix, thereby effectively exerting its own reinforcing effect and improving the mechanical strength of the sheet material.

[0018] The present invention reduces the usage of expensive natural rubber through the double-layer design, effectively saves production costs, and is conducive to popularization and use.

[0019] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. DETAILED DESCRIPTION

[0020] The following will be combined with the embodiments to clearly and completely describe the technical solutions of the present invention. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0021] Preparation Example Preparation of fiber functional additives: Step 1: Add 1.2 g of quartz fiber to toluene and disperse it evenly. Then, add 0.8 g of chloroethyl isocyanate and 0.01 g of dibutyltin dilaurate to the resulting dispersion. After the addition is complete, turn on the heat and gradually increase the temperature to 75°C. After continuous stirring for 6 hours, stop heating and discharge the material to obtain an organically modified quartz fiber. Step 2: Add 0.19 g of 5-bromopyrimidine-2-carboxylic acid and tetrahydrofuran to the reactor, start stirring, and after a uniform mixed solution is formed, introduce nitrogen for protection, then add 0.1 g of dicyclohexylcarbodiimide and 0.04 g of 4-dimethylaminopyridine, stir at room temperature for 30 minutes, and then add 0.2 g of [(6-oxo-6H-dibenzo[C,E][1,2]oxaphosphorin-6-yl)methyl]succinic acid bis(2-hydroxyethyl) ester to the reactor. After the addition is completed, heat to 45° C., keep warm for 4 hours, evaporate to remove the solvent, and collect the product to obtain a functional bridging agent; Step 3: Add 0.8 g of organically modified quartz fiber to a mixed solution of ethanol and purified water in a volume ratio of 1:1. After the addition is completed, disperse it until a uniform dispersion is formed, then add 3.5 g of tamarind gum and 10 mL of a 15% mass fraction of sodium hydroxide aqueous solution. After the addition is completed, raise the temperature to 65 ° C. After keeping warm for 3 hours, add 0.5 g of a functional bridging agent. After the addition is completed, further raise the temperature to 75 ° C. After continuous stirring for 8 hours, stop heating, wait for it to cool, pour it into a mold, let it stand to form a gel, and transfer it to a freeze dryer for freeze drying to obtain a fiber functional additive.

[0022] Example 1

[0023] A double-layer rubber-plastic sheet with heat-insulating and noise-reducing functions, comprising a surface layer and an inner layer; The surface layer is made of the following raw materials in parts by weight: 25 parts of natural rubber, 5 parts of styrene-butadiene rubber, 10 parts of polyvinyl chloride, 1 part of fiber functional additive, 5 parts of carbon black, 0.5 parts of antioxidant 4020, 10 parts of AC foaming agent, 3 parts of saturated fatty acid zinc salt dispersant LP623A, 3 parts of sulfur vulcanizing agent, 1 part of vulcanization accelerator PZ; The inner layer is made of the following raw materials in parts by weight: 25 parts of butadiene rubber, 12 parts of polyvinyl chloride, 10 parts of AC foaming agent, 1 part of lubricant, 0.5 parts of antioxidant 4020, 5 parts of carbon black, 1 part of calcium zinc stabilizer, 1 part of saturated fatty acid zinc salt dispersant LP623A dispersant, 3 parts of sulfur, 1 part of vulcanization accelerator PZ; The preparation method of the double-layer rubber-plastic sheet comprises the following steps: The first step is to weigh the raw materials of the surface layer according to the parts by weight, and then add natural rubber, styrene-butadiene rubber, polyvinyl chloride, fiber functional additives, carbon black, antioxidant 4020, AC foaming agent and saturated fatty acid zinc salt dispersant LP623A dispersant into an internal mixer, mix to 140°C, discharge the glue, and then pour it into an open mill, pass it through twice to produce a sheet with a thickness of 10 mm, and then continue to put it into the open mill, after hot pressing the roller, continue to add sulfur and vulcanization accelerator PZ, stir it evenly, and automatically turn the material over. After 300 seconds, the material is unloaded to form a surface layer rubber strip; The second step is to weigh the raw materials in the inner layer according to the weight parts, and then add the butadiene rubber, polyvinyl chloride, AC foaming agent, lubricant, antioxidant 4020, carbon black, calcium zinc stabilizer and saturated fatty acid zinc salt dispersant LP623A dispersant into the internal mixer and mix them. The material is discharged at 145 ° C, and then placed in the open mill, thinly passed twice to produce a sheet with a thickness of 10 mm, and then transferred to the open mill for secondary mixing. After the hot roller is rolled, sulfur and vulcanization accelerator PZ are added. After stirring, the material is automatically turned over and discharged after 300 seconds to form the inner layer rubber strip; The third step is to feed the surface rubber strip and the inner rubber strip into two extruders respectively, extrude through the same die head, control the extrusion temperature at 40°C and the die head temperature at 50°C, and form a semi-finished sheet material; The fourth step is to place the semi-finished sheet material in an oven with multiple drying tunnels for vulcanization and foaming. The temperatures of the multiple drying tunnels are controlled in sequence: section one 125±5°C, section two 130±5°C, section three 140±5°C, section four 150±5°C, section five 160±5°C, section six 170±5°C. After the foaming is completed, cool it down to obtain a double-layer rubber-plastic sheet material.

[0024] The preparation method of the fiber functional additive is shown in the preparation example, and the same applies to the following.

[0025] Example 2

[0026] A double-layer rubber-plastic sheet with heat-insulating and noise-reducing functions, comprising a surface layer and an inner layer; The surface layer is made of the following raw materials in parts by weight: 30 parts of natural rubber, 6 parts of styrene-butadiene rubber, 15 parts of polyvinyl chloride, 2 parts of fiber functional additives, 6 parts of carbon black, 1 part of antioxidant MBT, 15 parts of AC foaming agent, 4 parts of saturated fatty acid zinc salt dispersant LP623A dispersant, 4 parts of sulfur vulcanizing agent, 1.5 parts of vulcanization accelerator PZ; The inner layer is made of the following raw materials in parts by weight: 30 parts of butadiene rubber, 15 parts of polyvinyl chloride, 12 parts of AC foaming agent, 2 parts of lubricant, 1 part of antioxidant MBT, 6 parts of carbon black, 2 parts of calcium zinc stabilizer, 1.5 parts of saturated fatty acid zinc salt dispersant LP623A dispersant, 1 part of sulfur, and 1.5 parts of vulcanization accelerator PZ; The preparation method of the double-layer rubber-plastic sheet comprises the following steps: The first step is to weigh the raw materials of the surface layer according to the weight parts, and then add natural rubber, styrene-butadiene rubber, polyvinyl chloride, fiber functional additives, carbon black, antioxidant MBT, AC foaming agent and saturated fatty acid zinc salt dispersant LP623A dispersant into an internal mixer, mix to 150 ° C, discharge the glue, and then pour it into an open mill, pass it through twice to produce a sheet with a thickness of 10 mm, and then continue to put it into the open mill, after hot pressing the roller, continue to add sulfur and vulcanization accelerator PZ, stir well, and automatically turn the material. After 300 seconds, the material is unloaded to form a surface layer rubber strip; The second step is to weigh the raw materials in the inner layer according to the weight parts, and then add the butadiene rubber, polyvinyl chloride, AC foaming agent, lubricant, antioxidant 4020, carbon black, calcium zinc stabilizer and saturated fatty acid zinc salt dispersant LP623A dispersant into the internal mixer and mix them. The material is discharged at 150°C, and then placed in an open mill, thinly passed twice to produce a sheet with a thickness of 10 mm, and then transferred to the open mill for a second open mixing. After the hot roller is rolled, sulfur and vulcanization accelerator PZ are added, and after stirring, the material is automatically turned over and discharged after 300 seconds to form an inner layer rubber strip. The third step is to feed the surface rubber strip and the inner rubber strip into two extruders respectively, extrude through the same die head, control the extrusion temperature at 50°C and the die head temperature at 60°C, and form a semi-finished sheet material; The fourth step is to place the semi-finished sheet material in an oven with multiple drying tunnels for vulcanization and foaming. The temperatures of the multiple drying tunnels are controlled in sequence: section one 125±5°C, section two 130±5°C, section three 140±5°C, section four 150±5°C, section five 160±5°C, section six 170±5°C. After the foaming is completed, cool it down to obtain a double-layer rubber-plastic sheet material.

[0027] Example 3

[0028] A double-layer rubber-plastic sheet with heat-insulating and noise-reducing functions, comprising a surface layer and an inner layer; The surface layer is made of the following raw materials in parts by weight: 35 parts of natural rubber, 10 parts of styrene-butadiene rubber, 20 parts of polyvinyl chloride, 2.5 parts of fiber functional additives, 10 parts of carbon black, 1.5 parts of antioxidant MBT, 20 parts of AC foaming agent, 8 parts of saturated fatty acid zinc salt dispersant LP623A dispersant, 5 parts of sulfur vulcanizing agent, 2 parts of vulcanization accelerator PZ; The inner layer is made of the following raw materials in parts by weight: 40 parts of butadiene rubber, 18 parts of polyvinyl chloride, 15 parts of AC foaming agent, 3 parts of lubricant, 1.5 parts of antioxidant MBT, 10 parts of carbon black, 3 parts of calcium zinc stabilizer, 2 parts of saturated fatty acid zinc salt dispersant LP623A, 5 parts of sulfur, 2 parts of vulcanization accelerator PZ; The preparation method of the double-layer rubber-plastic sheet comprises the following steps: The first step is to weigh the raw materials of the surface layer according to the parts by weight, and then add natural rubber, styrene-butadiene rubber, polyvinyl chloride, fiber functional additives, carbon black, antioxidant MBT, AC foaming agent and saturated fatty acid zinc salt dispersant LP623A dispersant into an internal mixer, mix to 160 ° C, discharge the glue, and then pour it into an open mill, pass it through twice to produce a sheet with a thickness of 10 mm, and then continue to put it into the open mill, after hot pressing the roller, continue to add sulfur and vulcanization accelerator PZ, stir well, and automatically turn the material. After 300 seconds, the material is unloaded to form a surface layer rubber strip; The second step is to weigh the raw materials in the inner layer according to the weight parts, and then add the butadiene rubber, polyvinyl chloride, AC foaming agent, lubricant, antioxidant 4020, carbon black, calcium zinc stabilizer and saturated fatty acid zinc salt dispersant LP623A dispersant into the internal mixer and mix them. The material is discharged at 150°C, and then placed in an open mill, thinly passed twice to produce a sheet with a thickness of 10 mm, and then transferred to the open mill for a second open mixing. After the hot roller is rolled, sulfur and vulcanization accelerator PZ are added, and after stirring, the material is automatically turned over and discharged after 300 seconds to form an inner layer rubber strip. The third step is to feed the surface rubber strip and the inner rubber strip into two extruders respectively, extrude through the same die head, control the extrusion temperature at 50°C and the die head temperature at 60°C, and form a semi-finished sheet material; The fourth step is to place the semi-finished sheet material in an oven with multiple drying tunnels for vulcanization and foaming. The temperatures of the multiple drying tunnels are controlled in sequence: section one 125±5°C, section two 130±5°C, section three 140±5°C, section four 150±5°C, section five 160±5°C, section six 170±5°C. After the foaming is completed, cool it down to obtain a double-layer rubber-plastic sheet material.

[0029] Comparative Example 1 A double-layer rubber-plastic plate with heat preservation and noise reduction functions is different from Example 2 in that the fiber functional additive is replaced by unmodified quartz fiber, and the rest are the same.

[0030] Comparative Example 2 A double-layer rubber-plastic plate with heat preservation and noise reduction functions is different from Example 2 in that the fiber functional additive is removed, and the rest are the same.

[0031] Performance Testing Conduct sound insulation performance test according to standard GB / T 39526-2020; Conduct thermal conductivity test according to GB / T 10294-2008; Conduct mechanical strength tests according to standard GB / T 8813-2020; Conduct flame retardant performance test according to standard GB 8624-2012; The test results are recorded in the following table:

[0032] According to the test results, the rubber-plastic sheet material in the embodiment of the present invention has excellent performance in various aspects and can meet the industry development requirements of the sheet material.

[0033] After replacing the fiber functional additives with unmodified quartz fiber, the performance of the board was significantly reduced because the board did not contain aerogel structure and the quartz fiber also had the problem of poor dispersion.

[0034] Specific examples are used herein to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core ideas, including the best mode, and also enable any technician in the field to practice the present invention, including making and using any device or system, and implementing any combined method. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present invention, several improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the scope of protection of the claims of the present invention. The scope of patent protection of the present invention is defined by the claims and may include other embodiments that can be thought of by those skilled in the art. If these other embodiments have structural elements similar to the literal description of the claims, or if they include equivalent structural elements that are not substantially different from the literal description of the claims, then these other embodiments should also be included in the scope of the claims.

[0035] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A double-layer rubber-plastic sheet with heat preservation and noise reduction functions, characterized in that: Including surface layer and lining layer; The surface layer is made of the following raw materials in parts by weight: 25-35 parts of natural rubber, 5-10 parts of styrene-butadiene rubber, 10-20 parts of polyvinyl chloride, 1-2.5 parts of fiber functional additives, 5-10 parts of carbon black, 0.5-1.5 parts of antioxidant, 10-20 parts of foaming agent, 3-8 parts of dispersant, 3-5 parts of vulcanizing agent, 1-2 parts of vulcanizing accelerator; The inner layer is made of the following raw materials in parts by weight: 25-40 parts of butadiene rubber, 12-18 parts of polyvinyl chloride, 10-15 parts of foaming agent, 1-3 parts of lubricant, 0.5-1.5 parts of antioxidant, 5-10 parts of carbon black, 1-3 parts of stabilizer, 1-2 parts of dispersant, 3-5 parts of vulcanizing agent, 1-2 parts of vulcanizing accelerator; The preparation method of the fiber functional additive comprises the following steps: Step S1, adding quartz fiber to toluene, and after uniform dispersion, adding a surface modifier and a catalyst to the formed dispersion, turning on the heating, gradually raising the temperature to 70-80°C, stirring continuously for 4-8 hours, stopping the heating, and discharging the material to obtain an organically modified quartz fiber; Step S2, adding the organically modified quartz fiber to a mixed solution of ethanol and purified water in a volume ratio of 1:1, dispersing until a uniform dispersion is formed, continuing to add tamarind gum and an alkaline hydroxide aqueous solution, and after the addition is completed, raising the temperature to 60-70°C, keeping warm for 2-4 hours, and then adding a functional bridging agent. After the addition is completed, the temperature is further raised to 70-80°C, stirring is continued for 6-9 hours, and heating is stopped. After cooling, the fiber is poured into a mold, allowed to stand to form a gel, and transferred to a freeze dryer for freeze drying to obtain a fiber functional additive.

2. The double-layer rubber-plastic sheet with heat preservation and noise reduction functions according to claim 1, characterized in that: The preparation method of the double-layer rubber-plastic sheet comprises the following steps: The first step is to weigh the raw materials of the surface layer according to the weight parts, then add the natural rubber, styrene-butadiene rubber, polyvinyl chloride, fiber functional additives, carbon black, antioxidant, foaming agent and dispersant into the internal mixer, mix them to 140-160 ° C, discharge the glue, then pour them into the open mill, pass them through 2-3 times to produce sheets, control the thickness to be 5-10 mm, and then continue to put them into the open mill, after hot pressing the roller, continue to add the vulcanizing agent and vulcanizing accelerator, stir them evenly, and automatically turn the materials over. After 200-300 seconds, the materials are unloaded to form the surface layer rubber strips; The second step is to weigh the raw materials in the inner layer according to the weight parts, and then add the butadiene rubber, polyvinyl chloride, foaming agent, lubricant, antioxidant, carbon black, stabilizer and dispersant into the internal mixer and mix them. The material is discharged at 145-150 ° C, and then placed in the open mixer, thinly passed 2-3 times to produce a sheet with a thickness of 5-10 mm, and then transferred to the open mixer for secondary mixing. After the hot roller is pressed, the vulcanizing agent and vulcanizing accelerator are added, and after stirring, the material is automatically turned over and discharged after 200-300 seconds to form the inner layer rubber strip; The third step is to feed the surface rubber strip and the inner rubber strip into two extruders respectively, extrude through the same die head, control the extrusion temperature at 40-50°C and the die head temperature at 50-60°C, and form a semi-finished sheet material; The fourth step is to place the semi-finished sheet material in an oven with multiple drying tunnels for vulcanization and foaming. The temperatures of the multiple drying tunnels are controlled in sequence: section one 125±5°C, section two 130±5°C, section three 140±5°C, section four 150±5°C, section five 160±5°C, section six 170±5°C. After the foaming is completed, cool it down to obtain a double-layer rubber-plastic sheet material.

3. The double-layer rubber-plastic sheet with heat preservation and noise reduction function according to claim 1, characterized in that: In step S1, the surface modifier is chloroethyl isocyanate or 3-chloropropyl isocyanate.

4. The double-layer rubber-plastic sheet with heat preservation and noise reduction functions according to claim 1, characterized in that: In step S1, the catalyst is any one of octyltin mercaptan, dibutyltin dilaurate, stannous octoate or dibutyltin diacetate.

5. The double-layer rubber-plastic sheet with heat preservation and noise reduction function according to claim 1, characterized in that: In step S2, the alkaline hydroxide aqueous solution is a potassium hydroxide aqueous solution or a sodium hydroxide aqueous solution, with a mass fraction of 10-20%.

6. The double-layer rubber-plastic sheet with heat preservation and noise reduction functions according to claim 1, characterized in that: In step S2, the preparation method of the functional bridging agent is: 5-bromopyrimidine-2-carboxylic acid and tetrahydrofuran are added to a reaction kettle, and stirring is started. After a uniform mixed liquid is formed, nitrogen is introduced for protection. Then, a condensing agent and a accelerator are added. After stirring at room temperature for 20-40 minutes, [(6-oxo-6H-dibenzo[C,E][1,2]oxaphosphorin-6-yl)methyl]succinic acid bis(2-hydroxyethyl) ester is added to the reaction kettle. After the addition is completed, the temperature is raised to 40-50°C and kept warm for 3-6 hours. The solvent is evaporated and the product is collected to obtain a functional bridging agent.

7. The double-layer rubber-plastic sheet with heat preservation and noise reduction functions according to claim 6, characterized in that: The molar ratio of the 5-bromopyrimidine-2-carboxylic acid to bis(2-hydroxyethyl)[(6-oxo-6H-dibenzo[C,E][1,2]oxaphosphorin-6-yl)methyl]succinate is 2:

1.

8. The double-layer rubber-plastic sheet with heat preservation and noise reduction functions according to claim 6, characterized in that: The condensing agent is dicyclohexylcarbodiimide or 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide; and the accelerator is 4-dimethylaminopyridine or N-hydroxysuccinimide.

9. The double-layer rubber-plastic sheet with heat preservation and noise reduction functions according to claim 1, characterized in that: The antioxidant is at least one of antioxidant 4020 and antioxidant MBT; the foaming agent is AC foaming agent; the vulcanizing agent is sulfur; the vulcanization aid is at least one of vulcanization accelerator PZ, vulcanization accelerator DPTT or vulcanization accelerator EZ; and the stabilizer is calcium zinc stabilizer.

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