PERT floor heating pipe material and preparation method thereof

Abstract

The invention relates to a PERT floor heating pipe material and a preparation method thereof, and belongs to the technical field of floor heating pipe preparation. The PERT floor heating pipe material comprises an inner wall and an outer wall, wherein the inner wall is prepared from the following raw materials in parts by weight: 100-200 parts of high-density polyethylene, 20-40 parts of polyamide, 15-18 parts of a carbon-series heat conduction material and 6-8 parts of an antioxidant; the outer wall is prepared from the following raw materials in parts by weight: 100-150 parts of metallocene polyethylene, 30-35 parts of organic silicone powder, 10-13 parts of an antibacterial agent and 8-9 parts of a fluorine-containing polymer; the fluorine-containing polymer is at least one of polyvinylidene fluoride and polyvinyl fluoride. The PERT floor heating pipe material prepared by the invention is high in heat conductivity coefficient, low in inner wall dynamic friction factor, excellent in mechanical property, good in high-temperature hydraulic performance, capable of preventing an inner wall structure and breeding bacteria, long in service life and very high in application value.

Description

Technical Field

[0001] The present invention relates to the technical field of preparation of floor heating pipes, and particularly to a PERT floor heating pipe material and a preparation method thereof. Background Art

[0002] Compared with traditional metal pipes, plastic products have shown many advantages. Plastic pipes are light in weight, making the transportation and installation processes more convenient and efficient. At the same time, their low thermal conductivity and small heat loss characteristics make plastic pipes perform excellently in heat preservation and energy conservation. In addition, the installation of plastic pipes is convenient, greatly reducing the construction difficulty and cost. As a high-quality, high-performance and environmentally friendly heating material among plastic pipes, floor heating pipes have attracted much attention. Floor heating pipes have excellent toughness, can withstand large pressures and deformations, and ensure the stable operation of the heating system. Their water pressure resistance and temperature resistance also make floor heating pipes perform well during long-term use. Floor heating pipes have a broad market prospect and application potential, and have become the preferred pipes for many heating systems.

[0003] With the continuous improvement of people's requirements for heating systems, various functional floor heating pipes have emerged. These floor heating pipes have added many new functions, such as antibacterial, anti-corrosion, self-cleaning, etc. while retaining their original advantages, meeting the needs of different users. In a floor radiant heating system, the main pipe materials used are PEX, PERT, PB, etc. These materials have their own characteristics and jointly provide a reliable guarantee for the heating system. However, in the heating system, oxygen will enter the pipes and breed bacteria, which has an adverse effect on the heating effect. These bacteria form microbial slime on the pipe wall, greatly reducing the heat conduction efficiency of the pipe. At the same time, due to the inner wall of the pipe usually having wrinkles during the processing process, the flow rate of hot water in the pipe will be reduced, making some microorganisms in the water more likely to adhere to the pipe wall and finally form microbial slime, further affecting the heating effect. Therefore, when choosing floor heating pipes, it is necessary to pay attention to their antibacterial, anti-corrosion and other properties to ensure the long-term stable operation of the heating system.

[0004] Aiming at the deficiencies of the existing technology, it is urgent to provide a PERT floor heating pipe material and a preparation method thereof that can prevent scale formation on the inner wall, do not breed bacteria and algae, reduce the sliding friction coefficient, improve the hot water flow rate, have high heat conduction efficiency and comprehensive performance, can extend the service life of floor heating pipes, and have high application value. Summary of the Invention

[0005] The purpose of the present invention is to overcome the deficiencies of the existing technology and provide a PERT floor heating pipe material and a preparation method thereof. The PERT floor heating pipe material provided by the present invention has good heat conduction effect, is not easy to scale or breed microorganisms on the inner wall, has excellent mechanical strength, high service life, and high application value.

[0006] To achieve the above object, the technical solution adopted by the present invention is as follows:

[0007] In a first aspect, the present invention provides a PERT floor heating pipe material, including an inner wall and an outer wall. The preparation raw materials of the inner wall include the following components in parts by weight: 100-200 parts of high-density polyethylene, 20-40 parts of polyamide, 15-18 parts of carbon-based heat-conducting material, and 6-8 parts of antioxidant;

[0008] The preparation raw materials of the outer wall include the following components in parts by weight: 100-150 parts of metallocene polyethylene, 30-35 parts of silicone powder, 10-13 parts of antibacterial agent, and 8-9 parts of fluoropolymer;

[0009] The fluoropolymer is at least one of polyvinylidene fluoride and polyvinyl fluoride.

[0010] By selecting specific ratios of preparation raw materials, the present invention optimizes the pipe properties of the PERT floor heating pipe material to achieve better heat conduction and durability effects. The floor heating pipe provided by the present invention includes an inner wall and an outer wall, and the inner and outer walls are made of different preparation raw materials.

[0011] The preparation raw materials of the pipe outer wall mainly include high-density polyethylene, polyamide, carbon-based heat-conducting material, and antioxidant in specific ratios. Among them, high-density polyethylene (HDPE) is a polyethylene material with a density of 0.941-0.960 g / cm 3 , which has good cold resistance and corrosion resistance, but is prone to cracking under thermal oxidation conditions. To optimize the outer wall effect and extend the service life, the present invention uses specific proportions of polyamide, carbon-based heat-conducting material, and antioxidant for improvement: under the above suitable ratios of the present invention, the pipe has a high thermal conductivity and good high-temperature hydraulic performance, and the service performance is significantly improved.

[0012] The preparation raw materials of the pipe inner wall mainly include metallocene polyethylene, silicone powder, antibacterial agent, and fluoropolymer in specific ratios. In the prior art, heat-resistant polyethylene is commonly used as the inner wall raw material, but during the heating process of the floor heating pipe, oxygen entering the pipe is likely to breed bacteria; and the dynamic friction coefficient of the inner wall after pipe processing is relatively high. To improve the antibacterial effect of the inner wall and enhance the heat conduction efficiency, metallocene polyethylene with good processing performance is used, and specific ratios of silicone powder, antibacterial agent, and fluoropolymer are combined. Under suitable preparation raw material ratios, the sliding friction coefficient of the pipe inner wall can be reduced, microbial attachment can be well reduced, the inner wall does not scale, does not breed bacteria and algae, the hot water flow rate in the pipe is increased, the PERT floor heating pipe material has a self-cleaning function, and the service life of the floor heating pipe is extended. However, when the adopted ratio is not suitable, the overall thermal conductivity of the pipe may be reduced and the high-temperature hydraulic performance may be significantly affected.

[0013] The PERT floor heating pipe material provided by the present invention, which uses specific raw materials for the inner and outer walls, can significantly reduce the sliding friction coefficient of the inner wall of the floor heating pipe compared with that of common pipes on the market, and has a certain self-cleaning effect; moreover, it takes into account excellent thermal conductivity, basically meeting the requirements of the thermal conductivity coefficient of the heat-conducting PE-RT floor heating pipe; at the same time, it has good high-temperature hydraulic performance, long service life, and high application value.

[0014] Preferably, the carbon-based thermal conductive material is at least one of carbon nanotubes and graphite;

[0015] and / or the antioxidant is at least one of antioxidant 1010 and antioxidant 168;

[0016] and / or the antibacterial agent is at least one of silver ion antibacterial agent and silver-zinc composite antibacterial agent.

[0017] As a preferred solution of the present invention, the silver ion antibacterial agent can be the antibacterial agent Zeomic-AW10D of Japan Jieermei, and the silver-zinc composite antibacterial agent can be selected from the antibacterial agent KEPUYIN-J67 of Kepuyin.

[0018] Further preferably, the carbon-based thermal conductive material is carbon nanotubes. Using carbon nanotubes can achieve better comprehensive thermal conductivity and lower dynamic friction coefficient of the inner wall of the pipe.

[0019] Preferably, the fluoropolymer is a mixture of polyvinylidene fluoride and polyvinyl fluoride, and the mass ratio of polyvinylidene fluoride to polyvinyl fluoride is (0.8 - 1.2):(0.8 - 1.2).

[0020] By using the preferred fluoropolymer components and ratios, the dynamic friction coefficient of the inner wall of the pipe can be further reduced, and the bending strength of the pipe can be improved.

[0021] Preferably, the preparation method of the silicone powder is as follows:

[0022] (1) Dispersing the surfactant to obtain a dispersion liquid, adding silicone oil and a catalyst for cross-linking reaction to obtain a silicone emulsion;

[0023] (2) Filtering, washing, drying, and sieving the silicone emulsion to obtain the silicone powder.

[0024] Further preferably, the surfactant is stearic acid;

[0025] and / or the catalyst is bismuth neodecanoate or bismuth isooctanoate;

[0026] and / or the pH of the dispersion liquid is 7.8 - 8.2;

[0027] and / or the temperature of the cross-linking reaction is room temperature;

[0028] and / or the particle size of the silicone powder is 40 - 60 μm.

[0029] More preferably, the dispersion liquid is obtained by dispersing the surfactant stearic acid in 100 mL of deionized water and stirring it at a speed of 300 r / min for 15 minutes with a magnetic stirrer.

[0030] More preferably, step (1) is specifically: adding 20 g of silicone oil and 0.5 g of catalyst to the dispersion liquid, and continuing to stir for 30 minutes to fully mix all components.

[0031] As a preferred embodiment of the present invention, the pH value of the dispersion liquid is adjusted using the pH neutralizing agents acetic acid and sodium carbonate, measured with a precision pH test paper or a pH meter, and added dropwise while stirring until the pH value reaches 7.8 - 8.2.

[0032] More preferably, in step (2), after the silicone emulsion is left standing for 20 h, subsequent treatment is carried out.

[0033] As a preferred embodiment of the present invention, the duration of the cross-linking reaction is 8 h. During the reaction process, the solution gradually becomes viscous to form a silicone emulsion.

[0034] As a preferred embodiment of the present invention, the standing silicone emulsion is filtered through a 0.45 μm microporous filter membrane to remove any possible insoluble impurities; the filtered emulsion is washed with anhydrous ethanol, 50 mL of anhydrous ethanol is added each time, stirred for 5 minutes and then filtered again, and the washing is repeated 3 times.

[0035] As a preferred embodiment of the present invention, the washed product is transferred to a vacuum drying oven and dried at 60 °C for 12 h to fully volatilize and remove solvents, etc.; the dried product is sieved through a 100-mesh standard sieve to prepare the finished silicone powder.

[0036] The silicone powder prepared by the present invention using the above specific method can improve the smoothness of the inner wall of the pipe.

[0037] Preferably, the components of the raw materials for preparing the PERT floor heating pipe material further include a solvent.

[0038] More preferably, the solvent is at least one of acetone, toluene, and ethyl acetate.

[0039] As a preferred embodiment of the present invention, the raw materials for preparing the outer wall further include 15 - 20 parts of a solvent, and the raw materials for preparing the inner wall further include 15 - 20 parts of a solvent.

[0040] As a preferred embodiment of the present invention, the solvent in the raw materials for preparing the inner wall and the outer wall is acetone. Acetone as a solvent can achieve better preparation effects for the components.

[0041] Preferably, the raw materials for preparing the inner wall include the following components in parts by weight: 150 parts of high-density polyethylene, 30 - 40 parts of polyamide, 15 - 18 parts of carbon-based heat-conducting material, and 8 parts of antioxidant; the raw materials for preparing the outer wall include the following components in parts by weight: 150 parts of metallocene polyethylene, 35 parts of silicone powder, 13 parts of antibacterial agent, and 9 parts of fluoropolymer.

[0042] The comprehensive performance of the PERT floor heating pipe material is better under the preferred ratio.

[0043] In a second aspect, the present invention provides a method for preparing the above-mentioned PERT floor heating pipe material, comprising the following steps:

[0044] S1. Mix high-density polyethylene, polyamide, carbon-based heat-conducting material, antioxidant and solvent to obtain an outer wall mixture; mix metallocene polyethylene, silicone powder, antibacterial agent, fluoropolymer and solvent to obtain an inner wall mixture;

[0045] S2. Subject the outer wall mixture and the inner wall mixture to heating extrusion compounding and cooling to obtain the PERT floor heating pipe material.

[0046] Preferably, the used raw materials for preparation are dried before starting the preparation.

[0047] Preferably, the conditions for the heating extrusion are: the main machine speed is 130 - 150 r / min, and the temperatures of each section are: section I 175 - 185 °C, section II 180 - 190 °C, section III 175 - 185 °C, section IV 175 - 185 °C, section V 175 - 185 °C, section VI 180 - 190 °C, section VII 185 - 195 °C, section VIII 190 - 200 °C, section IX 195 - 205 °C, the head temperature is 190 - 200 °C, and the material temperature is 185 - 195 °C.

[0048] Preferably, S2 is specifically: passing the outer wall mixture and the inner wall mixture through heating extrusion to obtain a composite pipe, then sizing and performing two-stage vacuum water cooling to obtain the PERT floor heating pipe material; in the two-stage vacuum water cooling, the water temperature of the first stage is 65 - 75 °C, the water temperature of the second stage is 20 - 25 °C, and the vacuum degree is -0.3 - (-0.1) MPa.

[0049] Preferably, the heating extrusion is specifically: separately heating and extruding the outer wall mixture and the inner wall mixture, and then extruding through the same extrusion die to obtain a composite pipe.

[0050] Using the same extrusion die can make the overall pipeline have a good oxygen barrier effect.

[0051] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0052] By optimizing the raw materials for preparing the outer wall and the inner wall of the PERT floor heating pipe material, the inner wall of the prepared pipe does not scale, does not breed bacteria and algae, reduces the dynamic friction coefficient of the inner wall of the PERT floor heating pipe material, improves the flow rate of hot water in the pipeline, and enables the PERT floor heating pipe material to have a self-cleaning function; at the same time, the thermal conductivity coefficient of the pipe is increased and the high-temperature hydraulic performance is optimized, comprehensively improving the use effect of the floor heating pipe and extending the service life, which has high application value in the field of preparation of floor heating pipes. Specific embodiments

[0053] To better illustrate the purpose, technical solution and advantages of the present invention, the present invention will be further described below with reference to specific embodiments. The test methods used in the following embodiments are all conventional methods unless otherwise specified; the materials, reagents, etc. used are reagents and materials that can be obtained from commercial channels unless otherwise specified.

[0054] Example 1

[0055] An embodiment of the PERT floor heating pipe material of the present invention. The PERT floor heating pipe material in this embodiment includes an inner wall and an outer wall;

[0056] The raw materials for preparing the inner wall include the following components in parts by weight: 150 parts of high-density polyethylene, 40 parts of polyamide, 18 parts of carbon nanotubes, 8 parts of antioxidant 168, and 20 parts of acetone;

[0057] The raw materials for preparing the outer wall include the following components in parts by weight: 150 parts of metallocene polyethylene, 35 parts of silicone powder, 13 parts of antibacterial agent KEPUYIN-J67, 9 parts of fluoropolymer, and 20 parts of acetone;

[0058] Among them, the fluoropolymer is obtained by mixing 4.5 parts by weight of polyvinylidene fluoride and 4.5 parts by weight of polyvinyl fluoride;

[0059] The preparation method of the silicone powder is as follows:

[0060] (1) Disperse the surfactant stearic acid in 100 mL of deionized water, stir with a magnetic stirrer at a speed of 300 r / min for 15 minutes to obtain a dispersion; then use the pH neutralizing agents acetic acid and sodium carbonate to adjust the pH value of the dispersion, measure with a precision pH test paper or pH meter, and drip and stir until the pH value reaches 7.8;

[0061] Add 20 g of silicone oil and 0.5 g of bismuth isooctanoate catalyst to the above dispersion, and continue stirring for 30 minutes to fully mix all components; subject the mixed system to a crosslinking reaction at room temperature for 8 h. During the reaction, the solution gradually becomes viscous to form a silicone emulsion. After the reaction is completed, transfer the emulsion to a clean container and let it stand for 20 h;

[0062] (2) Filter the standing silicone emulsion through a 0.45-μm microporous membrane to remove any possible insoluble impurities; wash the filtered emulsion with absolute ethanol, adding 50 mL of absolute ethanol each time, stirring for 5 minutes and then filtering again, repeating the washing 3 times;

[0063] Transfer the washed product to a vacuum drying oven and dry it at 60 °C for 12 h to fully volatilize and remove the solvents therein, obtaining a solid silicone product. Finally, screen the dried product through a 100-mesh standard sieve to prepare a finished silicone powder with a particle size of 40 μm.

[0064] The preparation method of the PERT floor heating pipe material in this example is as follows:

[0065] S1. Weigh the preparation raw materials that meet the above weight portions and perform a drying treatment in a dryer;

[0066] Blend high-density polyethylene, polyamide, carbon nanotubes, antioxidant 168, and solvent acetone to obtain an outer wall mixture;

[0067] Blend metallocene polyethylene, silicone powder, antibacterial agent KEPUYIN-J67, fluoropolymer, and solvent acetone to obtain an inner wall mixture;

[0068] S2. Unload the above outer wall mixture and inner wall mixture from the feeder into the hopper of a twin-screw extruder respectively. After heating and extruding through the extruder, then extrude through the same extrusion die to obtain a two-layer composite pipe, and then size it through a sizing sleeve and enter a vacuum cooling water tank for two-stage cooling to obtain the PERT floor heating pipe material of this example;

[0069] Among them, the main machine rotation speed for heating and extrusion is 140 r / min, and the temperatures of each section of the extruder are: section I 180 °C, section II 185 °C, section III 180 °C, section IV 180 °C, section V 180 °C, section VI 185 °C, section VII 190 °C, section VIII 195 °C, section IX 200 °C, the head temperature is 195 °C, and the material temperature is 190 °C;

[0070] During the two-stage cooling, the cooling water temperature in the first stage is 65 °C, the water temperature in the second stage is 20 °C, and the vacuum degree is maintained at -0.2 MPa.

[0071] Examples 2-7 and Comparative Examples 1-5

[0072] Examples 2-7 are examples of the PERT floor heating pipe material of the present invention, which are different from Example 1 in that the components and / or ratios of the preparation raw materials used are different;

[0073] The difference between Example 2 and Example 1 is only that the carbon-based thermal conductive material carbon nanotubes are replaced with the same weight of graphite;

[0074] The difference between Example 3 and Example 1 is only that the fluoropolymer is obtained by mixing 4 parts by weight of polyvinylidene fluoride and 5 parts by weight of polyvinyl fluoride;

[0075] The difference between Example 4 and Example 1 is only that the weight parts of the raw materials for preparing the inner wall are changed to: 100 parts of high-density polyethylene, 40 parts of polyamide, 15 parts of carbon nanotubes, 8 parts of antioxidant 168, 20 parts of acetone; the weight parts of the raw materials for preparing the outer wall are: 100 parts of metallocene polyethylene, 35 parts of silicone powder, 13 parts of antibacterial agent KEPUYIN-J67, 8 parts of fluoropolymer (obtained by mixing 4 parts by weight of polyvinylidene fluoride and 4 parts by weight of polyvinyl fluoride), 20 parts of acetone;

[0076] The difference between Example 5 and Example 1 is only that the weight part of polyamide in the raw materials for preparing the outer wall is changed to 20 parts, and the solvent acetone is replaced with the same weight of ethyl acetate;

[0077] The difference between Example 6 and Example 1 is only that the weight part of silicone powder in the raw materials for preparing the inner wall is changed to 30 parts, and the fluoropolymer is replaced with 9 parts by weight of pure polyvinyl fluoride.

[0078] The difference between Example 7 and Example 1 is only that the self-made silicone powder in the raw materials for preparing the inner wall is replaced with commercially available silicone powder BT-9271.

[0079] The difference between Comparative Examples 1-3 and Example 1 is only that the composition or ratio of the fluoropolymer in the raw materials for preparing the inner wall is changed:

[0080] The fluoropolymer in Comparative Example 1 is obtained by mixing 6 parts by weight of polyvinylidene fluoride and 6 parts by weight of polyvinyl fluoride (a total of 12 parts by weight);

[0081] The fluoropolymer in Comparative Example 2 is obtained by mixing 3 parts by weight of polyvinylidene fluoride and 3 parts by weight of polyvinyl fluoride (a total of 6 parts by weight);

[0082] The fluoropolymer in Comparative Example 3 is replaced with 8 parts by weight of polytetrafluoroethylene;

[0083] The differences between Comparative Examples 4 and 5 and Example 1 are only that the weight parts of silicone powder in the raw materials for preparing the inner wall are changed to 50 parts and 20 parts respectively.

[0084] The preparation methods in the above Examples 2-7 and Comparative Examples 1-5 refer to Example 1.

[0085] The components and weight parts of the raw materials for preparing the PERT floor heating pipe materials in Examples 1-7 and Comparative Examples 1-5 of the present invention are summarized in Table 1 as follows.

[0086] Table 1 Components and weight parts of raw materials for preparing PERT floor heating pipe materials in examples and comparative examples

[0087]

[0088]

[0089] Effect Example

[0090] To explore the performance of the PERT floor heating pipe materials provided by the present invention, the thermal conductivity, dynamic friction coefficient of the inner wall, bending strength of the pipe, hydraulic performance, longitudinal shrinkage rate, average outer diameter, and minimum wall thickness of the PERT floor heating pipe materials in the examples and comparative examples were tested. Among them:

[0091] Thermal conductivity: Refer to the test method in GB / T 3399-1982;

[0092] Hydraulic performance, longitudinal shrinkage rate, average outer diameter, and minimum wall thickness: Refer to the test method in Standard GB / T 28799.2-2012;

[0093] Bending strength of the pipe: Refer to the test method in Standard GB / T 9341-2008.

[0094] The results of the above performance tests are shown in Table 2:

[0095] Table 2 Performance results of PERT floor heating pipe materials in examples and comparative examples

[0096]

[0097]

[0098] It can be seen from Table 2 that:

[0099] By comparing Example 1 and Comparative Examples 1-3, it can be known that the change of the specific fluoropolymer ratio in the inner wall preparation material components of the present invention has a significant impact on the comprehensive performance of the PERT floor heating pipe materials. When its dosage is too high, too low or the components are not suitable, the dynamic friction coefficient or thermal conductivity of the inner wall of the pipe decreases significantly, and the hydraulic performance becomes poor, unable to meet the requirements, and the service life becomes shorter;

[0100] Comparing Example 1 with Comparative Examples 4 and 5, it can be seen that the dosage of the specific silicone powder used in the present invention has a great influence on the comprehensive performance of the PERT floor heating pipe material. When the dosage is too high, it seriously affects the bending strength and thermal conductivity of the pipe, and the hydraulic performance decreases; when the dosage is too low, the dynamic friction coefficient of the inner wall of the pipe increases significantly, and the hot water flow rate in the pipe decreases, which is not conducive to the self-cleaning of the pipe.

[0101] Compared with the comparative examples, in the examples, under the specific preparation raw material components and ratios of the PERT floor heating pipe material provided by the present invention, the pipe has a high thermal conductivity, a low inner wall friction coefficient, a high bending strength, and good hydraulic performance, which can improve the practical effect of the floor heating pipe, extend the service life of the pipe, and has high application value.

[0102] In summary, the present invention provides a PERT floor heating pipe material with high thermal conductivity, low dynamic friction coefficient of the inner wall, high hot water flow rate, excellent hydraulic performance and bending strength at the same time. It has a certain self-cleaning function, can avoid scale formation and the growth of bacteria and algae on the inner wall of the pipe, can solve the problems in the prior art, comprehensively improve the use effect of the floor heating pipe and extend the service life, and has high application value in the field of the preparation of floor heating pipes.

[0103] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit the protection scope of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the essence and scope of the technical solutions of the present invention.

Claims

1. A PERT floor heating pipe material, characterized in that: It comprises an inner wall and an outer wall, wherein the raw materials for preparing the inner wall comprise the following components in parts by weight: 100-200 parts of high-density polyethylene, 20-40 parts of polyamide, 15-18 parts of carbon-based thermal conductive material, and 6-8 parts of antioxidant; The raw materials for preparing the outer wall include the following components in parts by weight: 100-150 parts of metallocene polyethylene, 30-35 parts of organic silicone powder, 10-13 parts of antibacterial agent, and 8-9 parts of fluorine-containing polymer; The fluorine-containing polymer is at least one of polyvinylidene fluoride and polyvinyl fluoride.

2. The PERT floor heating pipe material according to claim 1, characterized in that: The carbon-based thermal conductive material is at least one of carbon nanotubes and graphite; and / or the antioxidant is at least one of antioxidant 1010 and antioxidant 168; And / or the antibacterial agent is at least one of a silver ion antibacterial agent and a silver-zinc composite antibacterial agent.

3. The PERT floor heating pipe material according to claim 1, characterized in that: The fluorine-containing polymer is a mixture of polyvinylidene fluoride and polyvinyl fluoride, and the mass ratio of polyvinylidene fluoride to polyvinyl fluoride is (0.8-1.2): (0.8-1.2).

4. The PERT floor heating pipe material according to claim 1, characterized in that: The preparation method of the organosilicon powder is as follows: (1) dispersing a surfactant to obtain a dispersion, adding silicone oil and a catalyst to carry out a cross-linking reaction to obtain an organic silicone emulsion; (2) The organic silicone emulsion is filtered, washed, dried and sieved to obtain the organic silicone powder.

5. The PERT floor heating pipe material according to claim 4, characterized in that: The surfactant is stearic acid; and / or the catalyst is bismuth neodecanoate or bismuth isooctanoate; and / or the pH of the dispersion is 7.8-8.2; and / or the temperature of the cross-linking reaction is room temperature; And / or the particle size of the organic silicone powder is 40-60 μm.

6. The PERT floor heating pipe material according to claim 1, characterized in that: The raw material components for preparing the PERT floor heating pipe material also include a solvent.

7. The PERT floor heating pipe material according to claim 6, characterized in that: The solvent is at least one of acetone, toluene and ethyl acetate.

8. The method for preparing the PERT floor heating pipe material according to claim 6 or 7, characterized in that: The following steps are involved: S1, mixing high-density polyethylene, polyamide, carbon-based thermal conductive material, antioxidant and solvent to obtain an outer wall mixture; mixing metallocene polyethylene, organic silicone powder, antibacterial agent, fluorine-containing polymer and solvent to obtain an inner wall mixture; S2. The outer wall mixture and the inner wall mixture are subjected to heating, extrusion, compounding and cooling to obtain the PERT floor heating pipe material.

9. The method for preparing the PERT floor heating pipe material according to claim 8, characterized in that: The conditions for the heated extrusion are as follows: the main engine speed is 130-150r / min, the temperature of each section is: section I 175-185°C, section II 180-190°C, section III 175-185°C, section IV 175-185°C, section V 175-185°C, section VI 180-190°C, section VII 185-195°C, section VIII 190-200°C, section IX 195-205°C, the die temperature is 190-200°C, and the material temperature is 185-195°C.

10. The method for preparing the PERT floor heating pipe material according to claim 8, characterized in that: Specifically, S2 comprises: extruding the outer wall mixture and the inner wall mixture by heating to obtain a composite pipe, and then sizing and performing two stages of vacuum water cooling to obtain the PERT floor heating pipe material; in the two stages of vacuum water cooling, the water temperature in the first stage is 65-75°C, the water temperature in the second stage is 20-25°C, and the vacuum degree is -0.3-(-0.1)MPa.

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