Rubber hot water pipe as well as preparation method and application thereof

Abstract

The invention aims to provide a preparation method of a rubber hot water pipe. The preparation method comprises the following specific steps: 1) preparing a rubber composition containing rubber; 2) manufacturing a resin mixture composed of resin; (3) a resin mixture is mixed into the rubber composition, a rubber composition mixture is manufactured, and the weight ratio of the rubber composition to the resin mixture is 100: (10-30); and 4) melting the rubber composition mixture under the temperature condition of 210-250 DEG C, and molding to manufacture a pipeline molded product. According to the method, the pressure resistance, the heat resistance, the antibacterial property, the wear resistance, the impact resistance and other characteristics of the hot water pipe can be enhanced, the resistance to external impact is improved, and meanwhile the antibacterial property and the deodorization property of the hot water pipe are improved. Besides, the hot water pipe is made of elastic rubber materials, construction is easy, the vortex phenomenon generated in a bent or bent pipeline along with flowing of fluid can be reduced, and it is guaranteed that the fluid can be smoothly supplied.

Description

Technical Field

[0001] The invention belongs to the field of heating, and in particular provides a rubber hot water pipe and a preparation method and application thereof. Background Art

[0002] The pipes used to supply hot water need to be resistant to high temperatures, corrosion, bacteria and odor, and also have high requirements for properties such as wear resistance and impact resistance. Therefore, the existing pipes used to supply hot water are mostly made of metal or other specific materials (such as PVC, PPR, PE-X, etc.), and most of them are straight pipes with circular cross-sections. This type of straight pipe cannot be bent at will, and the construction is more difficult, and the clamping force is also relatively weak. If the straight pipe is bent with the help of external force for construction, the corresponding part is very easy to break. In the straight pipe, water and other fluids will generate vortices during the flow process, and the flow rate will decrease, which makes it difficult to supply the fluid smoothly.

[0003] In addition, the existing hot water boards are formed by combining multiple hot water boards to form a large hot water floor. Each hot water board is provided with a pipe for supplying hot water. In the process of connecting the hot water boards, these pipes must be connected separately, which reduces the work efficiency. In particular, when the pipes are equipped with separate inlet pipes and outlet pipes for hot water inflow and discharge, these pipes must be distinguished and connected separately, which requires a lot of work time. Summary of the invention

[0004] Based on the problems existing in the prior art, the present invention provides a rubber hot water pipe and a preparation method and application thereof.

[0005] One problem to be solved by the present invention is to provide a method for preparing a rubber hot water pipe and a rubber hot water pipe prepared by this method, so as to enhance the pressure resistance, heat resistance, antibacterial property, wear resistance, impact resistance and other properties of the hot water pipe, improve its resistance to external impact, and at the same time improve its antibacterial property and deodorization property, so that it can be used in a hygienic state at all times.

[0006] Another problem to be solved by the present invention is to provide an application of a rubber hot water pipe. The hot water pipe is made of elastic rubber material, which is easier to construct and can reduce the eddy current phenomenon generated inside the curved or bent pipe as the fluid flows, thereby ensuring smooth supply of the fluid.

[0007] The technical solution of the present invention is:

[0008] A method for preparing a rubber hot water pipe, characterized in that the specific steps are as follows:

[0009] 1) manufacturing a rubber composition containing rubber;

[0010] 2) manufacturing a resin mixture consisting of resins;

[0011] 3) mixing the resin mixture into the rubber composition to produce a rubber composition mixture, wherein the weight ratio of the rubber composition to the resin mixture is 100:10-30;

[0012] 4) The rubber composition mixture is melted at a temperature of 210 to 250° C. and then molded to produce a pipe molded product (such as Figure 1 As shown, it can be formed by known methods such as injection molding).

[0013] As the preferred technical solution:

[0014] The rubber composition comprises: 40 to 60 parts by weight of natural rubber, 10 to 30 parts by weight of EPDM rubber, 3 to 7 parts by weight of nano ceramic powder, 5 to 15 parts by weight of carbon black and 1 to 5 parts by weight of oil;

[0015] The resin mixture comprises: 80 to 120 parts by weight of polyethylene, 30 to 70 parts by weight of polybutylene terephthalate, 20 to 40 parts by weight of polybutylene adipate terephthalate and 10 to 20 parts by weight of EVA resin.

[0016] The average particle size of the nano-ceramic powder is 500-1500nm, and the average particle size of the carbon black is 10-5000nm; the oil is vegetable oil, and most preferably is an oil mixed with cashew nut shell oil (cashew nut shell oil) and aromatic oil in a weight ratio of 1:1.

[0017] The present invention utilizes the rubber composition to manufacture a hot water pipe, which can give the hot water pipe a certain elasticity and reduce the eddy current phenomenon generated inside a curved or bent pipe as the fluid flows, thereby ensuring smooth supply of the fluid.

[0018] The natural rubber has good dispersibility, and is excellent in strength and fatigue durability. The natural rubber of the present invention can generally be natural rubber used in the rubber industry or refined natural rubber.

[0019] The EPDM (Ethylene Prophlene Diene Monomer) rubber refers to a synthetic rubber composed of ethylene (Ethylene), propylene (Propylene) and non-conjugated diene (Non-conjugated Diene), and has good ozone resistance, cold resistance, heat resistance, solvent resistance, and good safety, so it can be realized in a variety of colors and patterns.

[0020] The nano ceramic powder can enhance properties such as wear resistance and scratch resistance. For example, the nano ceramic powder uses nano ceramic powder with an average particle size of 500 to 1500 nm, and one or more of the nano ceramic powders can be selected from the group consisting of silicon carbide, aluminum oxide and silicon dioxide.

[0021] The carbon black is mixed with the resin. If the specific surface area of ​​the carbon black is increased, the miscibility of the carbon black with the resin can be improved when the carbon black is mixed with the resin. The carbon black can have a particle size within the range of 10 to 5000 nm.

[0022] The function of the grease is to improve the low temperature properties of the hot water pipe without reducing the high temperature properties. If it is added to the resin mixture, it will be fully dispersed under the temperature conditions of the mixing process in the composition, and thus well dispersed in the mixture. At the same time, it also has the function of giving softness to the resin mixture mixed with the additive.

[0023] The cashew nut shell extracted oil is an aromatic oil, which may be an oil with hydrogenated anacardic acid as a main component. It is a phenolic lipid existing as a by-product in the process of obtaining cashew fruits on cashew trees, and can enhance the softness of a resin mixture mixed with additives.

[0024] As a high-viscosity substance, the aromatic oil has good matching properties with natural rubber powder and EPDM rubber powder molecules, and can improve the low-temperature performance of hot water pipes.

[0025] The polyethylene (PE) resin is an ultra-lightweight product among plastic products, and has good elasticity, water resistance, low-temperature impact resistance and other properties. For example, the polyethylene (PE) resin can use high-density polyethylene (HDPE) resin.

[0026] The high-density polyethylene (HDPE) resin is linear with almost no branching and has a molecular weight of less than 200,000. The high-density polyethylene resin is included in the resin mixture to enhance chemical resistance, heat resistance, moisture resistance, impact resistance and durability.

[0027] The polybutylene terephthalate resin is a type of polyester resin that has a low inherent absorption rate and produces a small dimensional change after absorbing water. Using the polybutylene terephthalate resin can make processing easier and improve the efficiency of the injection molding process through rapid crystallization.

[0028] That is, the polybutylene terephthalate resin is a crystalline, thermoplastic polyester resin that is relatively tough, has relatively large rigidity, and has excellent heat resistance and heat aging resistance (it can maintain good mechanical properties even under high temperature conditions). It has good electrical properties within a wide temperature range, a relatively low absorption rate, and excellent weather resistance and drug resistance.

[0029] The polybutylene terephthalate resin can be produced by using common 1,4-butanediol and terephthalic acid or dimethyl terephthalate as monomers, directly through esterification reaction or transesterification reaction, and then through polycondensation reaction. It is a resin with an inherent viscosity of 0.8 to 1.4 dl / g.

[0030] The polybutylene adipate terephthalate (PBAT) resin is a biodegradable bioplastic and an environmentally friendly material that can be 100% degraded within 6 months underground. The PBAT resin can be obtained by a well-known method by polycondensing 1,4-butanediol, adipic acid and terephthalic acid.

[0031] The PBAT resin can be either a resin directly synthesized by the above-mentioned common method or a commercially available resin, for example, it can also be used by importing commercial PBAT resins such as ECOPLEX (BASF) or PBG7070 (Samsung Fine Chemicals).

[0032] In addition, the PBAT resin may have a weight average molecular weight of 150,000 to 400,000. Since the PBAT resin has such a molecular weight range, the compatibility and processability between the PBAT resin and other materials are better. At the same time, due to its higher molecular weight, it can also exhibit better physical properties.

[0033] The EVA resin, as a copolymer resin of ethylene and vinyl acetate, has excellent properties such as transparency, softness, and low-temperature brittleness, and is also a very environmentally friendly resin.

[0034] The present invention can also prepare a coating on the surface of the pipe molded product to produce a finished rubber hot water pipe with a coating, which can enhance the wear resistance, impact resistance and other properties of the hot water pipe, and at the same time improve the resistance to external impact, antibacterial and deodorization properties.

[0035] The coating is prepared by coating a coating liquid composition on the surface of a pipe molded product and then drying the coating liquid composition to form a coating, wherein the coating liquid composition comprises: 20 to 60 parts by weight of polymethyl methacrylate resin (PMMA), 30 to 70 parts by weight of diphenylmethane diisocyanate (MDI), 5 to 15 parts by weight of ethylene-vinyl acetate copolymer (EVA), 3 to 7 parts by weight of plasticizer, 2 to 6 parts by weight of rosin ester, 1 to 3 parts by weight of oak charcoal, 1 to 3 parts by weight of high entropy alloy powder, 0.1 to 1 part by weight of illite powder, 0.5 to 1.5 parts by weight of silicon compound, 0.1 to 1 part by weight of aluminum oxide and 10 to 30 parts by weight of 4,4'-methylenebis(2-chloroaniline) (MOCA).

[0036] The polymethyl methacrylate (PMMA) resin refers to a resin with methyl methacrylate monomer as the main component, which can give the composition main functions such as mechanical properties, bonding strength and adhesion between resins and durability. As a material widely used in human daily life, it can be used for contact lenses or artificial joints, bones and the like. It is composed of regular combinations, so the environmental pollution caused by unreacted substances is relatively small. During the operation process and in the event of a fire, no toxic gas will be generated. It is an environmentally friendly product and is relatively safe for the human body.

[0037] The polymethyl methacrylate (PMMA) resin may have a molecular weight of 5,000 to 200,000 g / mol and a glass transition temperature (Tg) of 20 to 100° C.

[0038] The diphenylmethane diisocyanate (MDI) has excellent chemical properties such as water resistance, chemical resistance, and salt water resistance, and mechanical properties such as wear resistance and impact resistance, and also has excellent adhesion and waterproof properties.

[0039] The ethylene-vinyl acetate copolymer (EVA) is a polymer obtained by polymerizing ethylene and vinyl acetate monomers, and generally refers to a polymer resin called EVA. When the content of vinyl acetate monomer is low, it has excellent physical properties such as impact resistance, pressure resistance and crack resistance, just like ordinary low-density polyethylene. When the content of vinyl acetate is high, the adhesion can be improved, so it can be used as a raw material for adhesives or hot melt adhesives.

[0040] The ethylene-vinyl acetate copolymer (EVA), as a copolymer resin of ethylene and vinyl acetate, has excellent properties such as transparency, softness, and low-temperature brittleness. It is also a very environmentally friendly resin. For example, the ethylene-vinyl acetate copolymer has an ideal effect when using a product with a melt index of 400, a vinyl acetate content of 28%, and a glass transition temperature of -28.6°C.

[0041] The plasticizer can be used to mix with polymethyl methacrylate (PMMA) resin, diphenylmethane diisocyanate (MDI), ethylene-vinyl acetate copolymer (EVA), etc. to give it flexibility and adhesion. For example, the plasticizer can be selected from the group consisting of sorbitol, ethylene glycol, glycerin, glycerin diacetate and pentaerythritol.

[0042] The rosin ester is an amorphous oligomer with a molecular weight of several hundred to several thousand. As a thermoplastic resin in liquid or solid state at room temperature, it can reduce melt viscosity, improve working efficiency, and improve wettability at the initial stage of bonding. At the same time, it can improve the bonding force between it and the pipe molding and the coating liquid composition.

[0043] For example, the rosin ester may be selected from the group consisting of terpene resins, terpene phenol resins, aromatic-modified terpene resins, alkylphenol resins, and rosin-modified phenol resins having a softening point of 75 to 100°C.

[0044] The oak charcoal has radioactive anions, sterilization and deodorization functions, and is completely combined with the resin. For example, the oak charcoal can be made from oaks such as Quercus variabilis, Quercus hessianus, Quercus serrulata, Quercus mongolica, and Quercus serrata. Considering its dispersibility with the resin, a powder with a particle size of 100-300 mesh can be used.

[0045] The high entropy alloy powder can be formed by a high entropy alloy, which is a mixture of 4 to 5 or more metal elements in a certain element ratio to obtain effects such as higher mixing entropy, grid distortion caused by size differences of elements, and lower diffusion rate. Compared with existing metals, the high entropy alloy shows better mechanical properties.

[0046] In the present invention, the high entropy alloy powder can be formed of five kinds of powders: cobalt (Co), copper (Сu), zinc (Zn), nickel (Ni) and gallium (Ga), and Co is the most preferred. 20 Сu20 Zn 20 Ni 20 Ga 20 The high entropy alloy powder can use graded powder in the range of 100 to 200 meshes.

[0047] The illite powder can be produced by crushing illite into powder. As a relatively representative natural clay mineral, illite is defined as a porous mica mineral with a sheel structure, twistability and certain elasticity, and has better elasticity and adsorption than other minerals.

[0048] The main components of the illite mineral include 57.5% silicon dioxide (SiO2) for removing waste and fruit sebum in pores, 23.3% aluminum oxide (Al2O3) for promoting blood circulation, 6.76% iron oxide (Fe2O3) for binding collagen, 0.1% calcium oxide (CaO) for detoxification and suppressing and relieving stress, 1.21% sodium oxide (Na2O) for osmotic pressure regulation and moisture regulation, 0.38% magnesium oxide (MgO), 6.43% potassium oxide (K2O), 4.32% titanium oxide (TiO2), MnO, Li, Cr, Zn, Sr, etc.

[0049] In addition, the main function of the illite is to absorb floating objects in the water. Since it carries anions, it can induce floating particles to condense and precipitate by electrically neutralizing with cations. It has excellent water purification function and adsorption / decomposition ability for specific radioactive substances. It can adsorb, deodorize, and decompose various heavy metals and toxic gases in water / soil / atmosphere, activate cells, enhance immunity, emit a large amount of dissolved oxygen in the water, and activate water molecules. Illite itself will produce a large amount of anions, and can radiate 93% of far infrared rays at a temperature of 40°C. It has an antibacterial effect on viruses / bacteria / molds, etc., and can adsorb and decompose various heavy metals / organic substances / toxic substances on the skin. It has good elasticity and will not clump, so its adhesion is relatively excellent.

[0050] The silicon compound can be represented by the chemical formula -R2Si-0-SiR2- (here, R=CH3), and the silicon compound has its unique properties such as softness, chemical resistance, UV resistance, flame retardancy, environmental affinity, non-toxicity, solubility in a wide temperature range and stability.

[0051] In the present invention, the silicon compound is activated when a fire occurs, and the activated silicon causes a chain reaction to form a stable silicone network. Thus, the stable silicone network acts as a shield between heat sources, cuts off the heat supplied from the secondary heat source, and prevents oxygen from flowing in.

[0052] The aluminum oxide generates an endothermic reaction during a fire, thereby reducing the temperature rise and suppressing the combustion migration, thereby improving the heat resistance.

[0053] The aluminum oxide can be represented by the chemical formula Α12(OH)з. The aluminum oxide, as a product of the combustion reaction, generates a flame retardant, namely water and a metal oxide, thereby blocking the contact with oxygen, which is the cause of combustion, and can further improve the fire resistance of the dining table (10). Less harmful gases are generated during combustion, the smoke generation is lower, and the stability is relatively excellent.

[0054] The 4,4'-methylenebis(2-chloroaniline) (MOCA) can be used as a hardener for controlling the adhesion and hardening speed of polymethyl methacrylate (PMMA) resin, diphenylmethane diisocyanate (MDI), ethylene-vinyl acetate copolymer (EVA), and the like.

[0055] The rubber hot water pipe prepared by the method of the present invention has the advantages of excellent pressure resistance and heat resistance, non-toxicity, good wear resistance and impact resistance, etc. The rubber hot water pipe can be prepared into a flat pipe with a circular through hole in the inner axial direction, and its cross section is a rectangular structure (that is, the rubber hot water pipe has holes formed on the inner side to allow hot water and other fluids to flow through, and the outer side is a rectangular structure).

[0056] A heating plate containing the rubber hot water pipe of the present invention, characterized in that: the heating plate is composed of one or more hot water plate units, the hot water plate unit is composed of a heat sink, a heat conductor circulation component, and a filling layer, the heat conductor circulation component is arranged on the inner side of the heat sink, the filling layer is filled on the surface of the heat sink and the heat conductor circulation component, and the heat conductor circulation component is sealed in the filling layer; wherein:

[0057] A connection end is provided on each of the two sides of the inner side of the heat dissipation plate near the upper end;

[0058] The heat conductor circulation component consists of a supply pipe, a rubber hot water pipe, a discharge pipe and a reducer, wherein one or more groups of rubber hot water pipes are arranged between the supply pipe and the discharge pipe, and the two ends of the supply pipe and the discharge pipe are respectively arranged on the two connecting ends of the heat sink and connected to the reducer. The rubber hot water pipe is a flat tube with a circular through hole axially arranged inside, and its cross-section is rectangular. The aperture of the circular through hole in the rubber hot water pipe is 3 to 5 mm, the cross-sectional width of the rubber hot water pipe is 6 to 10 mm, and the cross-sectional length is 10 to 15 mm.

[0059] As the preferred technical solution:

[0060] Multiple hot water plate units can be connected in series via reducers.

[0061] Each hot water plate unit is provided with 3 to 6 groups of circulation pipes, and each group of circulation pipes is connected in parallel between the supply pipe and the discharge pipe.

[0062] The circulation pipe is connected to the supply pipe and the discharge pipe through a three-way pipe fitting.

[0063] The heat conductor circulation component is pasted on the inner side of the heat dissipation plate, or arranged in the card slot on the inner side of the heat dissipation plate; the heat dissipation plate is an aluminum zinc plate, and the filling layer is a polyurethane layer.

[0064] The thickness of the heat dissipation plate is 2-5 mm.

[0065] The thickness of each hot water plate unit is 20-40 mm, the width is 300-1000 mm, and the length is 500-2000 mm.

[0066] Each set of circulation pipes is bent only once.

[0067] The heating plate of the present invention can be used to prepare heating equipment, household steaming rooms, warm beds, warm pads or heating screens.

[0068] The beneficial effects of the present invention are:

[0069] 1. The hot water pipe of the present invention is made of elastic rubber material, which is easy to construct and can reduce the eddy current phenomenon generated inside the curved or bent pipe as the fluid flows, thereby ensuring smooth supply of the fluid.

[0070] 2. The method of the present invention further enhances the pressure resistance, heat resistance, non-toxicity, wear resistance, impact resistance and other properties of the hot water pipe, and improves the resistance to external impact.

[0071] 3. The method of the present invention further improves the antibacterial and anti-odor properties of the hot water pipe, so that it can be used in a hygienic state at all times.

[0072] 4. The cross-section of the hot water pipe described in the present invention is rectangular, which dissipates heat more evenly than the commonly used circular water pipe, and has a larger contact area with the heat dissipation plate, high thermal efficiency utilization rate and fast heat dissipation. Compared with the existing hot water pipes, the hot water pipe described in the present invention has the advantages of saving electricity, saving water, being low-carbon and environmentally friendly.

[0073] 5. The hot water pipe of the present invention is added with some mineral materials, which can release far infrared rays and negative ions beneficial to the human body, thereby improving the environmental comfort and eliminating the feeling of dryness and heat during heating. At the same time, it can improve the air quality and has a health-care effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0074] Figure 1 This is a photo of the rubber hot water pipe of the present invention;

[0075] Figure 2 A cross-sectional view of the heating plate unit of the present invention;

[0076] Figure 3 This is a simplified structural diagram of the hot water plate unit of the present invention;

[0077] Figure 4 This is a photo of the rubber hot water pipe according to Example 1 of the present invention being placed on a heating pad;

[0078] Figure 5 This is a photo of the rubber hot water pipe described in Example 1 of the present invention being used in a household steaming room;

[0079] Figure numerals: 1. heat sink, 2. heat conductor circulation assembly, 3. filling layer, 11. connection end, 21. supply pipe, 22. discharge pipe, 23. circulation pipe, 24. reducer. DETAILED DESCRIPTION

[0080] The advantages and features of the present invention and the methods for achieving these advantages and features will be more clearly understood by referring to the embodiments described in detail below. However, the present invention is not limited to the embodiments described here, but can also be implemented in other forms. On the contrary, the embodiments described here are provided to make the proposed content more thorough and complete and to fully convey the ideas of the present invention to those skilled in the art.

[0081] Unless otherwise specified, the average particle size of the nano-ceramic powder described below is 500 to 1500 nm, and the average particle size of the carbon black is 10 to 5000 nm.

[0082] Example 1

[0083] A method for preparing a rubber hot water pipe, the specific steps are as follows:

[0084] 1) manufacturing a rubber composition containing rubber;

[0085] A rubber composition is manufactured according to a weight ratio of 50 parts by weight of natural rubber, 20 parts by weight of EPDM rubber, 5 parts by weight of nano-ceramic powder, 10 parts by weight of carbon black and 3 parts by weight of oil; the oil is a mixture of cashew nut shell oil and aromatic oil in a weight ratio of 1:1.

[0086] 2) manufacturing a resin mixture consisting of resins;

[0087] A resin mixture was prepared according to a weight ratio of 100 parts by weight of polyethylene resin, 50 parts by weight of polybutylene terephthalate resin, 30 parts by weight of polybutylene adipate terephthalate resin, and 15 parts by weight of EVA resin.

[0088] 3) mixing 100 parts by weight of the rubber composition with 20 parts by weight of the resin mixture to produce a rubber composition mixture;

[0089] 4) melting the rubber composition mixture at a temperature of 230° C. and molding the mixture to produce a pipe molded product;

[0090] 5) The coating liquid composition is applied on the surface of the pipe molded product and dried to form a coating to manufacture a rubber hot water pipe.

[0091] The coating liquid composition comprises 40 parts by weight of polymethyl methacrylate (PMMA) resin, 50 parts by weight of diphenylmethane diisocyanate (Methylene Diphenyl Diisocyanate), 10 parts by weight of ethylene-vinyl acetate copolymer (EVA), 5 parts by weight of plasticizer, 4 parts by weight of rosin ester, 2 parts by weight of oak charcoal, and 2 parts by weight of high entropy alloy powder (Co 20 Сu 20 Zn 20 Ni 20 Ga 20 ), 0.5 parts by weight of illite powder, 1 part by weight of silicon compound, 0.5 parts by weight of aluminum oxide and 20 parts by weight of 4,4'-methylenebis(2-chloroaniline) (MOCA) are prepared.

[0092] Comparative Example 1

[0093] A rubber composition is prepared according to the weight ratio of 100 parts by weight of natural rubber, 30 parts by weight of EPDM rubber, 5 parts by weight of nano ceramic powder, 10 parts by weight of carbon black and 3 parts by weight of oil. The rubber composition is molded by a known method to manufacture a hot water pipe.

[0094] Comparative Example 2

[0095] A conventional PE hot water pipe (polyethylene pipe) was used as the hot water pipe of Comparative Example 2.

[0096] 1. Sensory evaluation

[0097] The sensory test was conducted on 50 ordinary consumers, and the scores and evaluation criteria were based on a 9-point scoring system. The results are shown in Table 1.

[0098] After the hot water pipes described in Example 1 and Comparative Examples 1 and 2 were placed on the heating pad, sensory evaluations were performed on aspects such as ease of construction and thermal conductivity. The results are shown in Table 2.

[0099] Table 1

[0100] Fraction Evaluation Criteria 9 very good 7 good 5 generally 3 Difference 1 Very bad

[0101] Table 2

[0102] distinguish Ease of construction Thermal conductivity Overall preference Example 1 8.4 8.3 8.4 Comparative Example 1 7.9 7.8 7.8 Comparative Example 2 6.3 6.0 6.1

[0103] With reference to Table 2, it can be confirmed that the hot water pipe manufactured according to Example 1 is more excellent than Comparative Examples 1 and 2 in terms of ease of construction, thermal conductivity, and comfort.

[0104] 2. Antibacterial Test

[0105] Hot water pipe test pieces (50X50 mm) manufactured according to the embodiment and comparative example 1 were prepared, and the antibacterial properties were investigated using the paper disk method with Bacillus subtilis, Escherichia coli and Salmonella typhimurium culture fluid as the objects. The results are shown in Table 3.

[0106] Table 3

[0107]

[0108] With reference to Table 3, it can be confirmed that the hot water pipe manufactured according to the example exhibits very excellent antibacterial activity against Bacillus, Escherichia coli and Salmonella.

[0109] Example 2

[0110] A method for preparing a rubber hot water pipe, the specific steps are as follows:

[0111] 1) manufacturing a rubber composition containing rubber;

[0112] A rubber composition is manufactured according to a weight ratio of 40 parts by weight of natural rubber, 30 parts by weight of EPDM rubber, 3 parts by weight of nano-ceramic powder, 13 parts by weight of carbon black and 2 parts by weight of oil; the oil is a mixture of cashew nut shell oil and aromatic oil in a weight ratio of 1:1.

[0113] 2) manufacturing a resin mixture consisting of resins;

[0114] A resin mixture was prepared according to a weight ratio of 120 parts by weight of polyethylene resin, 60 parts by weight of polybutylene terephthalate resin, 35 parts by weight of polybutylene adipate terephthalate resin, and 20 parts by weight of EVA resin.

[0115] 3) mixing the rubber composition with 100 parts by weight of the resin mixture to prepare a rubber composition mixture;

[0116] 4) melting the rubber composition mixture at a temperature of 210° C. and molding the mixture to produce a pipe molded product;

[0117] 5) The coating liquid composition is applied on the surface of the pipe molded product and dried to form a coating to manufacture a rubber hot water pipe.

[0118] The coating liquid composition comprises 30 parts by weight of polymethyl methacrylate resin, 35 parts by weight of diphenylmethane diisocyanate, 12 parts by weight of ethylene-vinyl acetate copolymer, 6 parts by weight of plasticizer, 3 parts by weight of rosin ester, 2 parts by weight of oak charcoal, 1 part by weight of high entropy alloy powder (Co 20 Сu 20 Zn 20 Ni 20 Ga 20 ), 0.3 parts by weight of illite powder, 0.8 parts by weight of silicon compound, 0.3 parts by weight of aluminum oxide and 10 parts by weight of 4,4'-methylenebis(2-chloroaniline) are prepared.

[0119] Example 3

[0120] A method for preparing a rubber hot water pipe, the specific steps are as follows:

[0121] 1) manufacturing a rubber composition containing rubber;

[0122] A rubber composition is manufactured according to a weight ratio of 60 parts by weight of natural rubber, 10 parts by weight of EPDM rubber, 6 parts by weight of nano-ceramic powder, 6 parts by weight of carbon black and 5 parts by weight of oil; the oil is a mixture of cashew nut shell oil and aromatic oil in a weight ratio of 1:1.

[0123] 2) manufacturing a resin mixture consisting of resins;

[0124] A resin mixture was prepared according to a weight ratio of 90 parts by weight of polyethylene resin, 35 parts by weight of polybutylene terephthalate resin, 25 parts by weight of polybutylene adipate terephthalate resin, and 10 parts by weight of EVA resin.

[0125] 3) mixing 30 parts by weight of the resin mixture with respect to 100 parts by weight of the total content of the rubber composition to produce a mixture of the rubber composition;

[0126] 4) melting the rubber composition mixture at a temperature of 250° C. and molding the mixture to produce a pipe molded product;

[0127] 5) The coating liquid composition is applied on the surface of the pipe molded product and dried to form a coating to manufacture a rubber hot water pipe.

[0128] The coating liquid composition comprises 50 parts by weight of polymethyl methacrylate resin, 65 parts by weight of diphenylmethane diisocyanate, 8 parts by weight of ethylene-vinyl acetate copolymer, 4 parts by weight of plasticizer, 5 parts by weight of rosin ester, 3 parts by weight of oak charcoal, 2 parts by weight of high entropy alloy powder (Co 20 Сu 20 Zn 20 Ni 20 Ga 20 ), 0.8 parts by weight of illite powder, 0.5 parts by weight of silicon compound, 0.8 parts by weight of aluminum oxide and 30 parts by weight of 4,4'-methylenebis(2-chloroaniline) are prepared.

[0129] Example 4

[0130] like Figure 2 , 3 As shown, a heating plate containing the rubber hot water pipe described in Example 1, the heating plate is composed of one or more hot water plate units, the hot water plate unit is composed of a heat sink 1, a heat conductor circulation component 2, and a filling layer 3, the heat conductor circulation component 2 is arranged on the inner side of the heat sink 1, the filling layer 3 is filled on the surface of the heat sink 1 and the heat conductor circulation component 2, and the heat conductor circulation component 2 is sealed in the filling layer 3; wherein:

[0131] A connection end 11 is provided on each side of the inner side of the heat dissipation plate 1 near the upper end;

[0132] The heat conductor circulation assembly 2 is composed of a supply pipe 21, a circulation pipe 23, a discharge pipe 22 and a reducer 24, wherein one or more groups of circulation pipes 23 are arranged between the supply pipe 21 and the discharge pipe 22, and the two ends of the supply pipe 21 and the discharge pipe 22 are respectively arranged on the two connecting ends 11 of the heat sink 1 and connected to the reducer 24. The circulation pipe 23 is a flat tube with a circular through hole axially arranged inside, and its cross-section is rectangular.

[0133] A plurality of hot water plate units can be connected in series through reducers 24 for use according to size requirements.

[0134] The diameter of the circular through hole in the circulation pipe 23 is 3-5 mm, the cross-sectional width of the circulation pipe 23 is 6-10 mm, and the cross-sectional length is 10-15 mm.

[0135] Each hot water plate unit is provided with 3 to 6 groups of circulation pipes 23 , and each group of circulation pipes 23 is connected in parallel between the supply pipe 21 and the discharge pipe 22 .

[0136] The circulation pipe 23 may be connected to the supply pipe 21 and the discharge pipe 22 via a three-way pipe fitting.

[0137] The heat conductor circulation component 2 is pasted on the inner side of the heat sink 1, or arranged in the slot on the inner side of the heat sink 1; the heat sink 1 is an aluminum-zinc plate, and the filling layer 3 is a polyurethane layer.

[0138] The thickness of the heat sink 1 is 2-5 mm.

[0139] The thickness of each hot water plate unit is 20-40 mm, the width is 300-1000 mm, and the length is 500-2000 mm.

[0140] Each group of circulation pipes 23 is bent only once.

[0141] Before use, one or more hot water plate units can be selected as needed to be spliced ​​to form a heating plate, and the special-shaped pipes at the water inlet of the heating plate, the controller, and the special-shaped pipes at the water outlet of the heating plate are connected together by pipes. The controller is provided with a quick heating device, which can quickly heat the water discharged from the water outlet of the heating plate to the required temperature, and send the heated water into the water inlet of the heating plate through the water pump in the quick heating device, thereby realizing the recycling of water, and the water temperature flowing into the heat conductor circulation component of the heating plate can be adjusted by the controller.

[0142] Example 5

[0143] like Figure 4 As shown, placing the rubber hot water pipe described in Example 2 on the heating pad can improve the heat dissipation efficiency of the product, and the rectangular hot water pipe dissipates heat more evenly than the commonly used round water pipe.

[0144] Example 6

[0145] like Figure 5 As shown, the rubber hot water pipe described in Example 3 is set in a household steam steaming room for use, which can improve the heating efficiency of the product, and the rectangular hot water pipe dissipates heat more evenly than the commonly used circular water pipe. The use of the rubber hot water pipe described in the present invention has the advantages of saving electricity, saving water, being low-carbon and environmentally friendly.

[0146] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A method for preparing a rubber hot water pipe, characterized in that: The specific steps are as follows: 1) manufacturing a rubber composition containing rubber; 2) manufacturing a resin mixture composed of resins; 3) mixing the resin mixture into the rubber composition to produce a rubber composition mixture, wherein the weight ratio of the rubber composition to the resin mixture is 100:10-30; 4) The rubber composition mixture is melted at a temperature of 210 to 250° C. and then molded to produce a pipe molded product.

2. The method for preparing the rubber hot water pipe according to claim 1, characterized in that: The rubber composition comprises: 40 to 60 parts by weight of natural rubber, 10 to 30 parts by weight of EPDM rubber, 3 to 7 parts by weight of nano ceramic powder, 5 to 15 parts by weight of carbon black and 1 to 5 parts by weight of grease; The resin mixture comprises: 80 to 120 parts by weight of polyethylene, 30 to 70 parts by weight of polybutylene terephthalate, 20 to 40 parts by weight of polybutylene adipate terephthalate and 10 to 20 parts by weight of EVA resin.

3. The method for preparing the rubber hot water pipe according to claim 2, characterized in that: The average particle size of the nano ceramic powder is 500-1500nm, the average particle size of the carbon black is 10-5000nm; and the oil is vegetable oil.

4. The method for preparing the rubber hot water pipe according to claim 3, characterized in that: The oil is prepared by mixing cashew nut shell extract oil and aromatic oil in a weight ratio of 1:

1.

5. The method for preparing the rubber hot water pipe according to claim 1, characterized in that: A coating is formed on the surface of the pipe molding to produce a finished rubber hot water pipe with a coating.

6. The method for preparing the rubber hot water pipe according to claim 5, characterized in that: The coating preparation method comprises the following steps: coating a coating liquid composition on the surface of a pipe molding and then drying the coating liquid composition to form a coating, wherein the coating liquid composition comprises: 20 to 60 parts by weight of polymethyl methacrylate resin, 30 to 70 parts by weight of diphenylmethane diisocyanate, 5 to 15 parts by weight of ethylene-vinyl acetate copolymer, 3 to 7 parts by weight of plasticizer, 2 to 6 parts by weight of rosin ester, 1 to 3 parts by weight of oak charcoal, 1 to 3 parts by weight of high entropy alloy powder, 0.1 to 1 part by weight of illite powder, 0.5 to 1.5 parts by weight of silicon compound, 0.1 to 1 part by weight of aluminum oxide and 10 to 30 parts by weight of 4,4'-methylenebis(2-chloroaniline).

7. A rubber hot water pipe prepared by the method according to any one of claims 1 to 6.

8. The rubber hot water pipe according to claim 7, characterized in that: The rubber hot water pipe is a flat pipe with a circular through hole axially arranged inside, and its cross section is rectangular.

9. A heating plate comprising the rubber hot water pipe according to claim 7, characterized in that: The heating plate is composed of one or more hot water plate units, and the hot water plate unit is composed of a heat sink, a heat conductor circulation component, and a filling layer. The heat conductor circulation component is arranged inside the heat sink, and the filling layer is filled on the surface of the heat sink and the heat conductor circulation component, and the heat conductor circulation component is sealed in the filling layer; wherein: A connection end is provided on each of the two sides of the inner side of the heat dissipation plate near the upper end; The heat conductor circulation component consists of a supply pipe, a rubber hot water pipe, a discharge pipe and a reducer, wherein one or more groups of rubber hot water pipes are arranged between the supply pipe and the discharge pipe, and the two ends of the supply pipe and the discharge pipe are respectively arranged on the two connecting ends of the heat sink and connected to the reducer. The rubber hot water pipe is a flat tube with a circular through hole axially arranged inside, and its cross-section is rectangular. The aperture of the circular through hole in the rubber hot water pipe is 3 to 5 mm, the cross-sectional width of the rubber hot water pipe is 6 to 10 mm, and the cross-sectional length is 10 to 15 mm.

10. An application of the heating plate according to claim 9, characterized in that: The heating plate is used for preparing heating equipment, household steaming rooms, warm beds, warm pads or heating screens.

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