Environment-friendly rubber-plastic fiber plastic wood material and preparation method thereof

Abstract

The application discloses an environment-friendly rubber-plastic fiber plastic wood material and a preparation method thereof, and comprises the following components in parts by weight: FR-PVG powder 100 parts, polyvinyl chloride thermoplastic elastomer 10-15 parts, calcium carbonate 40-50 parts, environment-friendly plasticizer 8-12 parts, epoxy soybean oil 4-6 parts, calcium-zinc composite stabilizer 3-5 parts, coupling agent 3-5 parts, PE wax 1 part, 0.1 mol / L acetic acid solution 200-250 parts, potassium iodide 1 part, polyethylene glycol 1-1.2 parts, and zinc stearate 1-1.5 parts. The polyester cotton fiber, PVC and flame retardant components in the waste rubber-plastic fabric whole-core flame-retardant conveying belt are mixed and dispersed with calcium carbonate to prepare the environment-friendly rubber-plastic fiber plastic wood material which is high in strength, good in flame retardancy and reusable, and realizes green recovery and high-value utilization of the waste rubber-plastic fabric whole-core flame-retardant conveying belt.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of recycling of waste polymer materials, and relates to the field of plastic-wood materials, in particular to an environment-friendly rubber-plastic fiber plastic-wood material and a preparation method thereof. BACKGROUND

[0002] The rubber-plastic fabric whole-core flame-retardant conveyor belt is the main tool for conveying coal in underground coal mines in China. The annual scrap amount reaches 400,000 tons. The basic components of the waste rubber-plastic fabric whole-core flame-retardant conveyor belt (FR-PVG for short) are rubber, PVC and polyester fiber. The material properties are basically unchanged during use, and the recycling value is high. However, the FR-PVG is a difficult-to-regenerate polymer composite material, and it is difficult to realize green recycling by traditional technology. It can only be disposed of by landfill or incineration, which not only causes major environmental problems, but also greatly wastes resources and energy. How to green, efficient and high-value recycling of FR-PVG is a social concern, a difficult problem that has not been solved and needs to be solved urgently.

[0003] Plastic-wood materials are mainly made of recycled waste plastics such as polypropylene (PP), polyethylene (PE), and polyvinyl chloride (PVC) as raw materials, and processed by adding wood powder and other plant fibers. Plastic-wood materials are waterproof, moisture-proof, and highly environmentally friendly, and can replace wood in large quantities. They are a promising low-carbon, green, and recyclable ecological material.

[0004] The powdered waste rubber-plastic fabric whole-core flame-retardant conveyor belt contains nitrile rubber, polyvinyl chloride (PVC), and polyester fiber, which can replace plant fibers, making the powdered waste rubber-plastic fabric whole-core flame-retardant conveyor belt have further processing potential, so as to prepare rubber-plastic plastic-wood materials and realize green recycling of the waste rubber-plastic fabric whole-core flame-retardant conveyor belt.

[0005] Patent CN112608579A discloses a preparation method of a corrosion-resistant and aging-resistant plastic-wood composite material. The waste plastic is crushed, and the waste plastic powder is used to modify the plastic-wood profile, which enhances the mechanical properties of the plastic-wood profile and achieves harmless resource utilization of the waste plastic. Patent CN102863809A discloses a plastic-wood profile and a preparation method thereof. The plastic-wood profile is produced from crop straw and waste plastic. The crop straw is crushed and directly mixed with the waste plastic, achieving harmless resource utilization of the crop straw and the waste plastic.

[0006] However, the above two patents are to crush the plastic, plant fiber and filler, and then blend with the additive, without considering the compatibility and dispersibility between the plant fiber and the plastic, the filler and the plastic, and there is a clear interface between the plant fiber and the plastic, resulting in weak adhesion between the plastic, so that the wood-plastic material prepared is easy to break and has poor physical strength; patent CN101747641A discloses a polyethylene-based wood-plastic composite material and a preparation method thereof, wherein stearic acid is used to modify the surface of wood fiber powder, so that a dense hydrophobic film is formed on the surface of the wood fiber, thereby improving the compatibility and dispersibility of the wood fiber and the polyethylene polymer; however, there is no solution for how to prepare an environmentally friendly rubber-plastic fiber-plastic wood material with excellent performance from a system containing polyester-cotton fiber, flame retardant and rubber.

[0007] Therefore, there is no environmentally friendly rubber-plastic fiber-plastic wood material using FR-PVG as raw material, using polyester-cotton fiber in FR-PVG to replace plant fiber, to prepare an environmentally friendly rubber-plastic fiber-plastic wood material with excellent performance. SUMMARY

[0008] The purpose of the present application is to use the polyester-cotton fiber and the flame retardant component in FR-PVG to mix and disperse with other fillers of plastic-wood material, to prepare an environmentally friendly rubber-plastic fiber-plastic wood material with high strength, good flame retardance and reusability.

[0009] The purpose of the present application can be achieved by the following technical solutions:

[0010] An environmentally friendly rubber-plastic fiber-plastic wood material is prepared by the following steps:

[0011] The FR-PVG powder and calcium carbonate are put into a kneader for heating, stirring and blending, and a coupling agent is sprayed to obtain a surface modified FR-PVG / calcium carbonate blend;

[0012] The surface modified FR-PVG / calcium carbonate blend is mixed with polyvinyl chloride thermoplastic elastomer, environmentally friendly plasticizer, epoxy soybean oil, calcium-zinc composite stabilizer and PE wax in an internal mixer to obtain a rubber-plastic fiber composite pre-plasticized material;

[0013] The pre-plasticized material is extruded and granulated by a double-tapered screw extruder to obtain the environmentally friendly rubber-plastic fiber-plastic wood material.

[0014] Further, the stirring speed of the kneader is 340-350 revolutions per minute, the temperature for starting to spray the coupling agent is 40-50 DEG C, and then the temperature is continuously increased to 110-115 DEG C, and stirring is performed for 20-22 minutes.

[0015] Further, the rotor speed of the internal mixer is 40-50 revolutions per minute, the temperature of the internal mixer is 165-170 DEG C, and the mixing time is 18-20 minutes.

[0016] Further, the twin-cone screw extruder granulator is used at a screw rotating speed of 30-40 r / min and a temperature of 165-170 DEG C.

[0017] Further, the environment-friendly rubber-plastic fiber-plastic wood material comprises the following components in parts by weight:

[0018] 100 parts of FR-PVG powder, 10-15 parts of polyvinyl chloride thermoplastic elastomer, 40-50 parts of calcium carbonate, 8-12 parts of environment-friendly plasticizer, 4-6 parts of epoxy soybean oil, 3-5 parts of calcium-zinc composite stabilizer, 3-5 parts of coupling agent and 1 part of PE wax;

[0019] Further, the environment-friendly rubber-plastic fiber-plastic wood material comprises the following components in parts by weight:

[0020] 200-250 parts of 0.1 mol / L acetic acid solution, 1 part of potassium iodide, 1-1.2 parts of polyethylene glycol and 1-1.5 parts of zinc stearate.

[0021] Further, the environment-friendly rubber-plastic fiber-plastic wood material comprises the following steps:

[0022] The FR-PVG powder is added into the 0.1 mol / L acetic acid solution, and the potassium iodide is added, stirred and heated to 70-80 DEG C, and then reacted for 2-3 h, filtered, dried in an oven, crushed through a 60-mesh sieve, and the pretreated FR-PVG powder is obtained.

[0023] The pretreated FR-PVG powder, polyethylene glycol, zinc stearate and CaCO3 are put into a kneader, heated, stirred, blended and sprayed with the coupling agent, and the surface-modified FR-PVG / CaCO3 blend is obtained.

[0024] Further, the FR-PVG powder preparation method comprises the following steps: 2 The blocky FR-PVG is crushed to obtain the FR-PVG powder with a particle size of 60 mesh.

[0025] Further, the environment-friendly plasticizer is any one of trioctyl trimellitate, dinonyl phthalate and dioctyl terephthalate; and the coupling agent is any one of gamma-glycidyl ether oxypropyl trimethoxysilane, gamma-methacryloyloxypropyl trimethoxysilane and titanium coupling agent.

[0026] Further, the environment-friendly rubber-plastic fiber-plastic wood material preparation method comprises the following steps:

[0027] The FR-PVG powder and the calcium carbonate are put into a kneader, heated, stirred, blended and sprayed with the coupling agent, and the surface-modified FR-PVG / calcium carbonate blend is obtained.

[0028] The FR-PVG / calcium carbonate blend after surface modification treatment is added into a mixing mill together with a polyvinyl chloride thermoplastic elastomer, an environmentally friendly plasticizer, an epoxy soybean oil, a calcium-zinc composite stabilizer and a PE wax to be mixed and kneaded, so as to obtain a rubber-plastic fiber composite pre-plasticized material;

[0029] The pre-plasticized material is extruded and granulated by a double-tapered screw extrusion granulator to obtain an environmentally friendly rubber-plastic fiber plastic wood material.

[0030] The present application has the following advantages:

[0031] The present application uses waste rubber-plastic fabric whole-core flame-retardant conveyor belt (FR-PVG) as a matrix to prepare an environmentally friendly rubber-plastic fiber plastic wood material, replaces polyester cotton fiber in FR-PVG with plant fiber, and the prepared rubber-plastic fiber plastic wood material has high strength, good flame-retardant performance, can be reused, low cost, and is convenient to process and form, can replace wood to manufacture rubber-plastic products, realizes green recycling and high-value utilization of FR-PVG, and avoids environmental pollution problems caused by FR-PVG treatment.

[0032] The present application modifies the surface of calcium carbonate and substances in FR-PVG powder by a coupling agent, increases the compatibility of calcium carbonate in FR-PVG powder, and then mixes with TPVC and an environmentally friendly plasticizer to comprehensively improve the mechanical properties of the environmentally friendly rubber-plastic fiber plastic wood material, and the coupling agent also improves the compatibility of the flame-retardant agent in FR-PVG powder, so that the prepared rubber-plastic fiber plastic wood material has good physical properties and flame-retardant performance.

[0033] The present application also pretreats FR-PVG powder, grafts polyester cotton fiber on PVC through oxalic acid molecules to replace plant fiber in PVC, so that the prepared rubber-plastic fiber plastic wood material has better performance, and the carboxyl groups on the oxalic acid molecules can also react with the surface hydroxyl groups of calcium carbonate in the subsequent step, so that the dispersibility of calcium carbonate in PVC is further improved.

[0034] The present application increases the flowability of calcium carbonate and FR-PVG powder by adding polyethylene glycol and zinc stearate, so that calcium carbonate flows and disperses better in the blending process, and polyethylene glycol and zinc stearate can modify the surface of calcium carbonate, so that the surface of calcium carbonate is smoother and the polarity is weakened, the compatibility of calcium carbonate and PVC is improved, the dispersibility of calcium carbonate is more uniform, the mechanical properties of the environmentally friendly rubber-plastic fiber plastic wood material are better improved, and zinc stearate can also adsorb zinc borate in FR-PVG powder, so that the dispersibility of zinc borate in the environmentally friendly rubber-plastic fiber plastic wood material is increased, and the flame-retardant performance of the material is improved. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the present application will be clearly and completely described below. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application. Embodiments

[0036] FR-PVG powder 100 parts, polyvinyl chloride thermoplastic elastomer (TPVC) 10 parts, calcium carbonate (CaCO3) 40 parts, trioctyl trimellitate (TOTM) 8 parts, epoxy soybean oil (ESO) 4 parts, calcium-zinc composite stabilizer (Ca-Zn) 3 parts, γ-glycidyl ether oxypropyl trimethoxysilane (KH560) 3 parts, PE wax 1 part;

[0037] The FR-PVG powder is obtained by crushing waste rubber and plastic fabric whole-core flame-retardant conveyor belt, and the particle size is 60 mesh;

[0038] The preparation method comprises the following steps:

[0039] (1) Clean the FR-PVG, and cut it into block-shaped FR-PVG with a size of 200 cm 2 ;

[0040] (2) Crush the block-shaped FR-PVG to obtain FR-PVG powder with a particle size of 60 mesh;

[0041] (3) Put the FR-PVG powder and CaCO3 into a kneader, heat and stir to blend, the stirring speed is 340 revolutions / minute, spray the coupling agent when the temperature is 40 ℃, continue to heat and stir, and stir for 20 minutes at a temperature of 110 ℃ to obtain the FR-PVG / CaCO3 blend subjected to surface modification treatment;

[0042] Calcium carbonate is a rigid filler, and has a small deformation amount at high temperature, which can improve the rigidity and modulus and heat deformation resistance of the composite material. However, the surface of calcium carbonate is strongly polar, and the compatibility is poor when mixed with the FR-PVG powder. The surface of calcium carbonate is modified by the coupling agent to improve the compatibility of calcium carbonate and the FR-PVG powder, and at the same time, the surface of the flame retardant such as magnesium hydroxide and aluminum hydroxide in the FR-PVG powder is modified to improve the dispersibility in the subsequent step;

[0043] (4) Put the FR-PVG / CaCO3 blend subjected to surface modification treatment, TPVC, environment-friendly plasticizer, ESO, Ca-Zn and PE wax into a banbury mixer to mix, the rotor speed of the banbury mixer is 40 revolutions / minute, and the mixing is performed at a temperature of 165 ℃ for 18 minutes to obtain the rubber and plastic fiber composite pre-plasticized material;

[0044] TPVC has numerous chloroethylene segments in the molecule, and has good compatibility with PVC resin. TPVC has high elasticity, aging resistance, oil resistance and other excellent properties of traditional crosslinked vulcanized rubber, and good compatibility with PVC, which can improve the mechanical properties of environmentally friendly rubber-plastic fiber-plastic wood materials.

[0045] (5) The above premix is passed through a double-tapered screw extrusion granulator set, extruded and granulated at a screw speed of 30 revolutions / minute and a temperature of 165°C, to obtain the environmentally friendly rubber-plastic fiber-plastic wood material. Example

[0046] FR-PVG powder 100 parts, TPVC 12 parts, CaCO3 45 parts, DINP 10 parts, ESO 5 parts, Ca-Zn 4 parts, KH570 (γ-methacryloxypropyltrimethoxysilane) 4 parts, PE wax 1 part;

[0047] The FR-PVG powder is crushed from waste rubber-plastic fabric whole-core flame-retardant conveyor belt, with a particle size of 60 mesh;

[0048] The preparation method comprises the following steps:

[0049] (1) The FR-PVG is cleaned and cut into 200cm 2 size FR-PVG blocks;

[0050] (2) The FR-PVG blocks are crushed to obtain FR-PVG powder with a particle size of 60 mesh;

[0051] (3) The FR-PVG powder and CaCO3 are put into a kneader for heating and stirring and blending, the stirring speed is 345 revolutions / minute, and the temperature is heated to 45°C to start spraying the coupling agent, and the heating and stirring continue, and the FR-PVG / CaCO3 blend after surface modification treatment is obtained at a temperature of 113°C and a stirring time of 21 minutes;

[0052] (4) The above FR-PVG / CaCO3 blend after surface modification treatment, TPVC, environmentally friendly plasticizer, ESO, Ca-Zn and PE wax are added into an internal mixer for mixing, the rotor speed of the internal mixer is 40-50 revolutions / minute, and the mixing is carried out at a temperature of 168°C for 19 minutes to obtain a rubber-plastic fiber composite pre-plasticized material;

[0053] (5) The above premix is passed through a double-tapered screw extrusion granulator set, extruded and granulated at a screw speed of 35 revolutions / minute and a temperature of 168°C, to obtain the environmentally friendly rubber-plastic fiber-plastic wood material. Example

[0054] FR-PVG powder 100 parts, TPVC 15 parts, CaCO3 50 parts, dioctyl terephthalate (DOTP) 12 parts, ESO 6 parts, Ca-Zn 5 parts, NDZ (titanate coupling agent) 5 parts, PE wax 1 part;

[0055] The FR-PVG powder is obtained by crushing a waste rubber-plastic fabric whole-core flame-retardant conveyor belt, and has a particle size of 60 mesh;

[0056] The preparation method comprises the following steps:

[0057] (1) clean the FR-PVG, and cut it into blocks of FR-PVG with a size of 200 cm 2 ;

[0058] (2) crush the blocky FR-PVG to obtain FR-PVG powder with a particle size of 60 mesh;

[0059] (3) put the FR-PVG powder and CaCO3 into a kneader, heat and stir to blend, the stirring speed is 350 revolutions per minute, spray the coupling agent when the temperature reaches 50°C, continue to heat and stir, and stir for 22 minutes at a temperature of 115°C to obtain a FR-PVG / CaCO3 blend subjected to surface modification treatment;

[0060] (4) put the FR-PVG / CaCO3 blend subjected to surface modification treatment, TPVC, environment-friendly plasticizer, ESO, Ca-Zn and PE wax into a banbury mixer to mix, the rotor speed of the banbury mixer is 50 revolutions per minute, and the mixing is performed at a temperature of 170°C for 20 minutes to obtain a rubber-plastic fiber composite pre-plasticized material;

[0061] (5) pass the pre-mixed material through a double-tapered screw extrusion granulator, and extrude and granulate at a screw rotation speed of 40 revolutions per minute and a temperature of 170°C to obtain an environment-friendly rubber-plastic fiber plastic-wood material. Embodiment

[0062] FR-PVG powder 100 parts, polyvinyl chloride thermoplastic elastomer (TPVC) 10 parts, calcium carbonate (CaCO3) 40 parts, trioctyl trimellitate (TOTM) 8 parts, epoxy soybean oil (ESO) 4 parts, calcium-zinc composite stabilizer (Ca-Zn) 3 parts, γ-glycidyl ether oxypropyl trimethoxysilane (KH560) 3 parts, and PE wax 1 part;

[0063] 0.1 mol / L acetic acid solution 200-250 parts, potassium iodide 1 part, polyethylene glycol 1-1.2 parts, and zinc stearate 1-1.5 parts;

[0064] The FR-PVG powder is obtained by crushing a waste rubber-plastic fabric whole-core flame-retardant conveyor belt, and has a particle size of 60 mesh;

[0065] The preparation method comprises the following steps:

[0066] (1) clean the FR-PVG and cut it into 200 cm 2 size blocks of FR-PVG;

[0067] (2) crush the blocks of FR-PVG to obtain FR-PVG powder with a particle size of 60 mesh;

[0068] (3) add the FR-PVG powder into 0.1 mol / L acetic acid solution, add potassium iodide, stir and heat to 70-80℃, react for 2-3 h, then filter, dry the obtained solid in an oven, crush and pass through a 60 mesh sieve to obtain pretreated FR-PVG powder;

[0069] In the oxalic acid solution, with potassium iodide as a catalyst, part of the PVC in the FR-PVG powder can react with oxalic acid to graft oxalic acid molecules on the PVC, forming a PVC-oxalic acid product, which contains carboxyl groups and can react with the terminal alcohol hydroxyl groups on the polyester-cotton fibers in the FR-PVG powder, so that the polyester-cotton fibers can be combined with the PVC-oxalic acid and dispersed in the PVC;

[0070] (4) add the pretreated FR-PVG powder, polyethylene glycol, zinc stearate and CaCO3 into a kneader, heat and stir to blend, the stirring speed is 340 r / min, start to spray a coupling agent when the temperature reaches 40℃, continue to heat and stir, and stir for 20 min at a temperature of 110℃ to obtain a surface modified FR-PVG / CaCO3 blend;

[0071] The surface of the calcium carbonate powder is hydrophilic and oleophobic, and it is difficult to uniformly disperse when directly compounded with a high polymer matrix, which leads to a decrease in the mechanical properties of the composite material, and the calcium carbonate has no flowability, which leads to an increase in the resistance to mutual displacement of polymer molecules, and it is difficult to knead and blend, therefore, polyethylene glycol is added to improve the flowability of the calcium carbonate and PVC during blending, and the surface of the calcium carbonate is further modified, which improves the lubricity of the calcium carbonate, reduces the voids of the PVC material, and makes the calcium carbonate more uniformly dispersed; the surface of the calcium carbonate also contains certain hydroxyl groups, which can be combined with the carboxyl groups on the oxalic acid molecules when mixed with the FR-PVG powder, thereby increasing the dispersity of the calcium carbonate;

[0072] The FR-PVG powder also contains zinc borate flame retardant components, and the surface is hydrophilic and oleophobic, which makes it difficult to disperse in the PVC, the addition of zinc stearate in the pretreated FR-PVG powder not only increases the flowability of the system and plays a lubricating role, but also modifies the surface of the zinc borate, the zinc ions in the zinc stearate can be adsorbed to the surface of the zinc borate, so that the surface of the zinc borate becomes hydrophobic, which increases the compatibility of the zinc borate and the PVC, and the zinc borate also has a certain surface modification effect on the calcium carbonate, which increases the dispersity of the calcium carbonate;

[0073] (5) The FR-PVG / CaCO3 blend after surface modification treatment is added into the internal mixer together with TPVC, environmentally friendly plasticizer, ESO, Ca-Zn and PE wax, and mixed at a rotor speed of 40 rpm for 18 minutes at a temperature of 165°C to obtain an elastoplastic fiber composite pre-plasticized material;

[0074] (6) The pre-mixed material is extruded and granulated by a double-tapered screw extruder at a screw speed of 30 rpm and a temperature of 165°C to obtain an environmentally friendly elastoplastic fiber plastic wood material. Embodiment

[0075] 100 parts of FR-PVG powder, 10 parts of polyvinyl chloride thermoplastic elastomer (TPVC), 40 parts of calcium carbonate (CaCO3), 8 parts of trioctyl trimellitate (TOTM), 4 parts of epoxy soybean oil (ESO), 3 parts of calcium-zinc composite stabilizer (Ca-Zn), 3 parts of γ-glycidyl ether oxypropyl trimethoxysilane (KH560), and 1 part of PE wax;

[0076] 200-250 parts of 0.1 mol / L acetic acid solution, 1 part of potassium iodide, 1-1.2 parts of polyethylene glycol, and 1-1.5 parts of zinc stearate;

[0077] The FR-PVG powder is obtained by crushing waste old elastoplastic fabric whole-core flame-retardant conveyor belt, and has a particle size of 60 mesh;

[0078] The preparation method comprises the following steps:

[0079] (1) The FR-PVG is cleaned and cut into block-shaped FR-PVG with a size of 200 cm 2 ;

[0080] (2) The block-shaped FR-PVG is crushed to obtain FR-PVG powder with a particle size of 60 mesh;

[0081] (3) The FR-PVG powder is added into 0.1 mol / L acetic acid solution, and potassium iodide is added. After stirring and heating to 70-80°C, the reaction is carried out for 2-3 hours, and then filtration is performed. The obtained solid is dried in an oven, crushed through a 60 mesh sieve, and FR-PVG powder after pretreatment is obtained;

[0082] (4) The pretreated FR-PVG powder, polyethylene glycol, zinc stearate and CaCO3 are put into a kneader for heating and stirring and blending. The stirring speed is 340 rpm, and the temperature is heated to 40°C. Coupling agent is sprayed, and the stirring and heating are continued at a temperature of 110°C for 20 minutes to obtain FR-PVG / CaCO3 blend after surface modification treatment;

[0083] (5) The FR-PVG / CaCO3 blend after surface modification treatment is added into a mixing mill together with TPVC, environment-friendly plasticizer, ESO, Ca-Zn and PE wax, and mixed at a rotor speed of 40 rpm for 18 minutes at a temperature of 165 DEG C to obtain an elastoplastic fiber composite pre-plasticized material;

[0084] (6) The pre-mixed material is extruded and granulated by a double-cone screw extruder at a screw speed of 30 rpm and a temperature of 165 DEG C to obtain an environment-friendly elastoplastic fiber plastic wood material.

[0085] The samples of Examples 1-5 are subjected to performance detection, and the detection data are shown in Table 1.

[0086] Table 1

[0087]

[0088] As shown from the data in Table 1, the elongation at break of Examples 1-5 is all higher than 159%, which indicates that the plastic wood material prepared by the present application has good toughness, and the elongation at break of Examples 4-5 is better than that of Examples 1-3, which indicates that the cross-linking strength of the plastic wood material is improved by grafting PVC molecules with oxalic acid and polyester cotton fibers, and the flexibility of the plastic wood material is improved; the flame retardant performance of Examples 1-5 all reaches V1, which indicates that the environment-friendly elastoplastic fiber plastic wood material prepared by the present application has good flame retardant performance.

[0089] The above describes one embodiment of the present application in detail, but the content described is only a preferred embodiment of the present application, and cannot be considered as limiting the scope of the present application. Any equivalent changes and improvements made according to the scope of the present application should still belong to the scope of the present application.

Claims

1. An environmentally friendly rubber-plastic fiber-plastic wood-plastic material, characterized in that, This environmentally friendly rubber-plastic fiber-plastic wood-plastic material is prepared by the following steps: Add FR-PVG powder to 0.1 mol / L oxalic acid solution, add potassium iodide, stir and heat to 70-80℃, react for 2-3 hours, then filter, put the filtered solid into an oven to dry, pulverize and pass through a 60-mesh sieve to obtain pretreated FR-PVG powder. Pretreated FR-PVG powder, polyethylene glycol, zinc stearate and CaCO3 were put into a kneader, heated and stirred to mix, and a coupling agent was sprayed to obtain a surface-modified FR-PVG / CaCO3 blend. The surface-modified FR-PVG / CaCO3 blend was mixed with polyvinyl chloride thermoplastic elastomer, environmentally friendly plasticizer, epoxidized soybean oil, calcium-zinc composite stabilizer and PE wax in a mixer to obtain rubber-plastic fiber composite preplasticized material. The above pre-plasticized material is extruded and granulated using a twin-cone screw extrusion granulator to obtain environmentally friendly rubber-plastic fiber-plastic wood-plastic material; The weight parts of each of the above raw materials are as follows: 100 parts FR-PVG powder, 10-15 parts polyvinyl chloride thermoplastic elastomer, 40-50 parts calcium carbonate, 8-12 parts environmentally friendly plasticizer, 4-6 parts epoxidized soybean oil, 3-5 parts calcium-zinc composite stabilizer, 3-5 parts coupling agent, and 1 part PE wax. 200-250 parts of 0.1mol / L oxalic acid solution, 1 part of potassium iodide, 1-1.2 parts of polyethylene glycol, and 1-1.5 parts of zinc stearate.

2. The environmentally friendly rubber-plastic fiber-plastic wood-plastic material according to claim 1, characterized in that, The kneader has a stirring speed of 340-350 rpm, and the coupling agent is first sprayed at a temperature of 40℃-50℃, then the temperature is increased to 110℃-115℃ and stirred for 20-22 minutes.

3. The environmentally friendly rubber-plastic fiber-plastic wood-plastic material according to claim 1, characterized in that, The internal mixer rotor speed is 40-50 rpm, the internal mixer temperature is 165℃-170℃, and the mixing time is 18-20 minutes.

4. The environmentally friendly rubber-plastic fiber-plastic wood-plastic material according to claim 1, characterized in that, The twin-cone screw extruder granulator operates at a screw speed of 30-40 rpm and a temperature of 165℃-170℃.

5. The environmentally friendly rubber-plastic fiber-plastic wood-plastic material according to claim 1, characterized in that, The method for preparing the FR-PVG powder is as follows: clean the FR-PVG and cut it into 200cm pieces. 2 The FR-PVG blocks of various sizes were crushed to obtain FR-PVG powder with a particle size of 60 mesh.

6. The environmentally friendly rubber-plastic fiber-plastic wood-plastic material according to claim 1, characterized in that, The environmentally friendly plasticizer is any one of trioctyl trimellitate, dinonyl phthalate, and dioctyl terephthalate; the coupling agent is any one of γ-glycidoxypropyltrimethoxysilane, γ-methacryloyloxypropyltrimethoxysilane, and titanate coupling agent.

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