Composition for preparing artificial grass silk, artificial grass silk and preparation method of artificial grass silk

Abstract

The invention relates to the technical field of artificial grass yarns, and particularly relates to a composition for preparing artificial grass yarns, the artificial grass yarns and a preparation method of the artificial grass yarns, and the composition for preparing the artificial grass yarns comprises the following components in percentage by mass: 70-85% of ethylene-octylene copolymer; 7%-15% of a carbon nanotube; 3%-5% of graphene quantum dots; 0%-5% of piezoelectric ceramic particles; and 5%-10% of a maleic anhydride grafted ethylene-octylene copolymer. According to the technical scheme, the sensing function is integrated into the artificial grass silk composition, the function limitation that traditional artificial grass silk is only used for simulating the appearance and touch sense of a natural lawn is broken through, and the artificial grass silk composition is endowed with the characteristics of intelligence and monitoring. Through reasonable combination of the multiple functional materials, the artificial grass yarn can be used as a lawn and can also sense changes of the external environment in real time, a novel functional material is provided for the fields of stadiums, intelligent homes, intelligent security and protection and the like, and the artificial grass yarn has high application value.

Description

Technical Field

[0001] The present invention relates to the technical field of artificial turf yarns, and in particular to a composition for preparing artificial turf yarns, the artificial turf yarns and a preparation method thereof. Background Art

[0002] In the field of artificial turf preparation, existing technologies primarily focus on improving the mechanical properties of turf by modifying the polymer matrix, but pay significantly less attention to electrical properties and sensing functions. Traditional artificial turf materials generally suffer from poor conductivity and slow signal response, making it difficult to meet the high demands for electrical performance and sensing accuracy in applications such as modern smart sports venues and environmental monitoring lawns. This is especially true in specialized scenarios requiring real-time monitoring of physical quantities such as pressure and temperature. The electrical performance and sensor response speed of traditional turf materials are insufficient to meet the requirements for precise sensing, severely limiting their application in the field of multifunctional composite materials. Summary of the Invention

[0003] In order to solve the problems in the related art, the embodiments of the present disclosure provide an anion exchange membrane water electrolysis anode catalyst material and a preparation method.

[0004] In a first aspect, the present disclosure provides a composition for preparing artificial turf, comprising the following components by mass fraction:

[0005] Ethylene-octene copolymer: 70%-85%;

[0006] Carbon nanotubes: 7%-15%;

[0007] Graphene quantum dots: 3%-5%;

[0008] Piezoelectric ceramic particles: 0%-5%;

[0009] Maleic anhydride grafted ethylene-octene copolymer: 5%-10%.

[0010] In the disclosed method, ethylene-octene copolymer (POE) is used as the matrix material of the composition to provide the artificial grass with flexibility, low temperature resistance and a certain mechanical strength, so that the grass has basic morphological stability and durability. The ethylene-octene copolymer of the Engage 8150 brand from the Dow Chemical Company of the United States can be used. This brand of ethylene-octene copolymer has a suitable molecular weight and molecular weight distribution, which can ensure good processing and molding properties. Its density is generally 0.8-1.0g / cm 3 The melting point is between 70-90°C, and the melt flow rate (MFR) is 0.5-3g / 10min under the test conditions of 190°C / 2.16kg.

[0011] Using 70%-85% ethylene-octene copolymer as the main matrix material helps to provide artificial grass with basic properties such as good flexibility, low temperature resistance and processing performance. At the same time, it provides a suitable carrier for the subsequent addition of other functional components, enabling it to expand the sensing function while ensuring the basic performance of the grass.

[0012] In the present disclosure, carbon nanotubes (CNTs) utilize their excellent electrical properties, high electrical conductivity and mechanical properties to form a conductive network in the composition, improve the overall electrical conductivity, and enhance the mechanical strength of the material, while providing a basis for realizing electrical properties and sensing functions. It can be prepared by chemical vapor deposition (CVD) method, with ethanol as carbon source, and grown on a silicon wafer containing a small amount of iron catalyst (such as Fe powder with a particle size of 10-30nm). Specifically, the silicon wafer is first immersed in a precursor solution containing Fe, placed in a tube furnace after drying, and reacted for 0.5-2 hours at 700-900°C and an ethanol atmosphere to obtain carbon nanotubes. After purification, for example, by soaking with hydrochloric acid to remove residual catalyst, then washing with deionized water to neutrality, and finally drying, carbon nanotubes with higher purity can be obtained. The carbon nanotubes in the present disclosure have an outer diameter generally between 10-30nm and a length between 1-5μm. Of course, carbon nanotubes can also be selected from commercially available products that meet the requirements, and the present disclosure does not limit this.

[0013] In the disclosed method, graphene quantum dots (GQDs) work synergistically with carbon nanotubes by virtue of their quantum size effect, high specific surface area and unique optical and electrical properties, optimize the electrical properties of the composition, improve charge transfer efficiency and interfacial interaction, and enhance the sensing sensitivity and response speed of physical quantities (such as pressure and temperature). It can be prepared by chemical oxidation. Natural graphite powder (particle size less than 10 μm) is mixed with concentrated sulfuric acid and sodium nitrate, potassium permanganate is added in an ice-water bath, and after stirring and reacting for 2-3 hours, the temperature is gradually raised to 35-50 ° C and the reaction is continued for 1-2 days. The mixture is then poured into ice water, filtered, washed with dilute hydrochloric acid and deionized water until neutral, and dried to obtain graphene oxide. The graphene oxide is then dispersed in water and separated by ultrasonic treatment and filtration to obtain graphene quantum dots. The particle size of these quantum dots is generally between 1-5 nm, the number of layers is 1-3 layers, and they are rich in oxygen-containing functional groups (such as hydroxyl, carboxyl, etc.), and the content of their oxygen-containing functional groups is not less than 20%. Of course, graphene quantum dots can also be selected from commercially available products that meet the requirements, and this disclosure does not impose any restrictions on this.

[0014] By adding a combination of 7%-15% carbon nanotubes and 3%-5% graphene quantum dots, utilizing the excellent electrical properties, high conductivity and mechanical properties of carbon nanotubes, and the quantum size effect, high specific surface area and unique optical and electrical properties of graphene quantum dots, the two work synergistically to effectively improve the conductivity, sensing sensitivity and response speed of the composition, providing a basis for achieving precise sensing of physical quantities such as pressure and temperature.

[0015] In the disclosed method, piezoelectric ceramic particles generate a weak charge when squeezed or deformed by external forces, providing the composition with a certain degree of energy collection and conversion capabilities, broadening the application scenarios of artificial turf, such as energy collection in smart lawns. The piezoelectric ceramic particles can be selected from commercially available products, including one or more of nano-sized barium titanate, lead zirconate titanate, and lead titanate.

[0016] Piezoelectric ceramic particles can be added selectively at a ratio of 1%, 3%, 3.5%, 4%, or 5%. Adding 3.5-5% piezoelectric ceramic particles can ensure that the composition has sufficient piezoelectric response without causing other performance degradation or affecting processing performance due to excessive addition.

[0017] In the disclosed method, maleic anhydride-grafted ethylene-octene copolymer serves as a compatibilizer to improve the compatibility between the ethylene-octene copolymer and nanomaterials such as carbon nanotubes and graphene quantum dots, promote the uniform dispersion of the various components during the blending process, enhance the overall comprehensive performance of the material, enable the advantages of each component to be fully synergistically utilized, and improve the thermal stability and mechanical properties of the composition. Specifically, the ethylene-octene copolymer is used as the base resin and is prepared through a melt grafting reaction. First, the ethylene-octene copolymer is mixed with maleic anhydride and dicumyl peroxide as initiators in a specific ratio (e.g., ethylene-octene copolymer: maleic anhydride: dicumyl peroxide = 100:5:0.5 by mass), and the grafting reaction is carried out in a twin-screw extruder. The extruder temperature is set at 160-200°C and the screw speed is 200-400 rpm. After the grafting reaction, the maleic anhydride-grafted ethylene-octene copolymer is obtained, with a grafting rate of 1%-3%.

[0018] Adding 5%-10% maleic anhydride to the ethylene-octene copolymer improves the compatibility between the components, particularly strengthening the interfacial bonding between the ethylene-octene copolymer and polar or non-polar materials such as carbon nanotubes, graphene quantum dots, and piezoelectric ceramic particles. Through chemical grafting, maleic anhydride reacts with POE to form a reactive graft, which interacts with surface active groups such as carbon nanotubes or active sites on the surface of piezoelectric ceramic particles. This improves the stability of the entire composite system and the synergistic effects between the components, thereby enhancing the overall performance of the composite and the reliability of the sensing function.

[0019] According to an embodiment of the present disclosure, a composition for preparing artificial turf includes the following components in mass fractions:

[0020] Ethylene-octene copolymer: 70%-80%;

[0021] Carbon nanotubes: 7%-10%;

[0022] Graphene quantum dots: 4%-5%;

[0023] Piezoelectric ceramic particles: 4%-5%;

[0024] Maleic anhydride grafted ethylene-octene copolymer: 5%-10%.

[0025] In the disclosed method, the composition includes a variety of materials with different physical property response mechanisms, such as carbon nanotubes, graphene quantum dots and piezoelectric ceramic particles, so that the composition has the potential to simultaneously sense multiple physical quantities, such as using the changes in the electrical properties of carbon nanotubes and graphene quantum dots to sense temperature, humidity, electric field, etc., and using the piezoelectric effect of piezoelectric ceramic particles to sense pressure, vibration, etc.

[0026] According to an embodiment of the present disclosure, the density of the ethylene-octene copolymer is 0.8-1.0 g / cm 3 , the melt mass flow rate is 0.5-3.0g / 10min.

[0027] According to an embodiment of the present disclosure, the carbon nanotubes are multi-walled carbon nanotubes with an outer diameter of 10-30 nm, a length of 1-5 μm, and a purity of not less than 95%.

[0028] According to an embodiment of the present disclosure, the graphene quantum dots have a particle size of 1-5 nm, a layer number of 1-3, and a content of oxygen-containing functional groups of not less than 20%.

[0029] According to an embodiment of the present disclosure, the piezoelectric ceramic particles include one or more of nano-scale barium titanate, lead zirconate titanate, and lead titanate.

[0030] According to an embodiment of the present disclosure, 0.5-2% of an antibacterial agent is further included, and the antibacterial agent is nanosilver particles or a chitosan antibacterial agent.

[0031] In the disclosed method, the addition of antibacterial agents can effectively inhibit the growth and reproduction of microorganisms such as bacteria and molds, prevent bacteria from breeding on the surface of artificial turf and causing odor, discoloration and other problems, extend the service life of artificial turf and keep its appearance neat, and enhance the user experience.

[0032] According to an embodiment of the present disclosure, 1-3% of an ultraviolet absorber is further included, and the ultraviolet absorber is a benzotriazole, benzophenone or substituted acrylonitrile ultraviolet absorber.

[0033] In the disclosed method, the addition of ultraviolet absorbers can absorb ultraviolet rays in sunlight and prevent ultraviolet rays from damaging the polymer substrate and other additives, thereby improving the weather resistance and anti-aging properties of artificial grass yarn, enabling it to maintain good physical properties and appearance for a long time in outdoor environments.

[0034] In a second aspect, an embodiment of the present disclosure provides an artificial grass yarn, which is prepared from the composition described in any one of the first aspects.

[0035] In a third aspect, an embodiment of the present disclosure provides a method for preparing the artificial turf according to any one of the second aspects, comprising the following steps:

[0036] The ethylene-octene copolymer, carbon nanotubes, graphene quantum dots, piezoelectric ceramic particles, and maleic anhydride grafted ethylene-octene copolymer are dried respectively;

[0037] The dried components are mixed evenly according to the corresponding mass fractions to obtain a mixed material, wherein the mixing speed is 800-1200 r / min and the mixing time is 10-20 min;

[0038] The mixed material is added into a twin-screw extruder, and artificial turf is obtained through melt blending and extrusion molding. The temperature of each section of the twin-screw extruder is set to 160-180°C in the feeding section, 200-220°C in the melting section, 220-240°C in the homogenizing section, 230-250°C in the extrusion section, and the screw speed is 300-500r / min.

[0039] According to an embodiment of the present disclosure, the drying conditions are drying at 60-80°C for 4-8 hours to reduce the moisture content of each component to less than 0.5%. This drying condition ensures that each component is fully dried to prevent moisture from affecting subsequent extrusion molding and sensing performance.

[0040] According to the embodiments of the present disclosure, the temperature parameter setting of the twin-screw extruder can enable the components to be fully melted and blended during the extrusion process, thereby ensuring the uniformity and sensing performance of the artificial grass yarn.

[0041] According to an embodiment of the present disclosure, after extrusion molding, post-processing steps such as cooling, pulling, cutting and surface treatment of the artificial grass yarn are also included to ensure the performance stability and appearance integrity of the grass yarn.

[0042] The technical effects provided by the embodiments of the present disclosure may include the following beneficial effects:

[0043] According to the technical solution provided in the embodiments of the present disclosure, a composition for preparing artificial turf yarn includes the following components by mass fraction: ethylene-octene copolymer: 70%-85%; carbon nanotubes: 7%-15%; graphene quantum dots: 3%-5%; piezoelectric ceramic particles: 0%-5%; and maleic anhydride-grafted ethylene-octene copolymer: 5%-10%. By integrating sensing functions into the artificial turf yarn composition, the above technical solution breaks through the functional limitations of traditional artificial turf yarn, which is only used to simulate the appearance and touch of natural turf, and gives it intelligent and monitorable characteristics. Through the rational combination of the above-mentioned multiple functional materials, the artificial turf yarn can not only be used as a lawn, but also can sense changes in the external environment in real time, such as physical quantities such as pressure and temperature, or monitor the use status of the lawn and the exercise status of athletes, etc., providing a new functional material with great application value in fields such as sports stadiums, smart homes, and smart security.

[0044] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure. DETAILED DESCRIPTION

[0045] The present invention is further illustrated below by way of examples, but it is to be understood that these specific examples are not intended to limit the scope of the present invention in any way. It should be noted that, unless otherwise specified, the raw materials used in the following examples are all commercially available.

[0046] Example 1: Ethylene-octene copolymer, carbon nanotubes, graphene quantum dots, and maleic anhydride-grafted ethylene-octene copolymer were dried separately to make the moisture content of each component less than 0.5%;

[0047] Weighing 85% of the dried ethylene-octene copolymer, 7% of carbon nanotubes, 3% of graphene quantum dots, and 5% of the maleic anhydride-grafted ethylene-octene copolymer by mass, and mixing them uniformly to obtain a mixed material, wherein the mixing speed is 800-1200 r / min and the mixing time is 10-20 min;

[0048] The mixed material is added into a twin-screw extruder, and artificial turf is obtained through melt blending and extrusion molding. The temperature of each section of the twin-screw extruder is set to 160-180°C in the feeding section, 200-220°C in the melting section, 220-240°C in the homogenizing section, 230-250°C in the extrusion section, and the screw speed is 300-500r / min.

[0049] Example 2: Ethylene-octene copolymer, carbon nanotubes, graphene quantum dots, and maleic anhydride-grafted ethylene-octene copolymer were dried separately to make the moisture content of each component less than 0.5%;

[0050] Weighing 80% of the dried ethylene-octene copolymer, 10% of carbon nanotubes, 4% of graphene quantum dots, and 6% of the maleic anhydride-grafted ethylene-octene copolymer by mass, and mixing them uniformly to obtain a mixed material, wherein the mixing speed is 800-1200 r / min and the mixing time is 10-20 min;

[0051] The mixed material is added into a twin-screw extruder, and artificial turf is obtained through melt blending and extrusion molding. The temperature of each section of the twin-screw extruder is set to 160-180°C in the feeding section, 200-220°C in the melting section, 220-240°C in the homogenizing section, 230-250°C in the extrusion section, and the screw speed is 300-500r / min.

[0052] Example 3: Ethylene-octene copolymer, carbon nanotubes, graphene quantum dots, and maleic anhydride-grafted ethylene-octene copolymer were dried separately to make the moisture content of each component less than 0.5%;

[0053] Weighing 70% of the dried ethylene-octene copolymer, 15% of carbon nanotubes, 5% of graphene quantum dots, and 10% of the maleic anhydride-grafted ethylene-octene copolymer by mass, and mixing them uniformly to obtain a mixed material, wherein the mixing speed is 800-1200 r / min and the mixing time is 10-20 min;

[0054] The mixed material is added into a twin-screw extruder, and artificial turf is obtained through melt blending and extrusion molding. The temperature of each section of the twin-screw extruder is set to 160-180°C in the feeding section, 200-220°C in the melting section, 220-240°C in the homogenizing section, 230-250°C in the extrusion section, and the screw speed is 300-500r / min.

[0055] Example 4: Ethylene-octene copolymer, carbon nanotubes, graphene quantum dots, piezoelectric ceramic particles, and maleic anhydride grafted ethylene-octene copolymer are dried separately so that the moisture content of each component is less than 0.5%; among them, the piezoelectric ceramic particles are nano-barium titanate with the brand M575 produced by Guangzhou Hongwu Material Technology Co., Ltd.

[0056] Weighing 80% of the dried ethylene-octene copolymer, 7% of carbon nanotubes, 4% of graphene quantum dots, 4% of piezoelectric ceramic particles, and 5% of maleic anhydride-grafted ethylene-octene copolymer by mass, and mixing them uniformly to obtain a mixed material, wherein the mixing speed is 800-1200 r / min and the mixing time is 10-20 min;

[0057] The mixed material is added into a twin-screw extruder, and artificial turf is obtained through melt blending and extrusion molding. The temperature of each section of the twin-screw extruder is set to 160-180°C in the feeding section, 200-220°C in the melting section, 220-240°C in the homogenizing section, 230-250°C in the extrusion section, and the screw speed is 300-500r / min.

[0058] Example 5: Ethylene-octene copolymer, carbon nanotubes, graphene quantum dots, piezoelectric ceramic particles, and maleic anhydride-grafted ethylene-octene copolymer are dried separately so that the moisture content of each component is less than 0.5%; among them, the piezoelectric ceramic particles are lead zirconate titanate piezoelectric ceramic particles with brands such as PIC151 and PIC255 produced by Puai Nano Company.

[0059] Weighing 75% of the dried ethylene-octene copolymer, 8% of carbon nanotubes, 4.5% of graphene quantum dots, 4.5% of piezoelectric ceramic particles, and 8% of maleic anhydride-grafted ethylene-octene copolymer by mass, and mixing them uniformly to obtain a mixed material, wherein the mixing speed is 800-1200 r / min and the mixing time is 10-20 min;

[0060] The mixed material is added into a twin-screw extruder, and artificial turf is obtained through melt blending and extrusion molding. The temperature of each section of the twin-screw extruder is set to 160-180°C in the feeding section, 200-220°C in the melting section, 220-240°C in the homogenizing section, 230-250°C in the extrusion section, and the screw speed is 300-500r / min.

[0061] Example 6: Ethylene-octene copolymer, carbon nanotubes, graphene quantum dots, piezoelectric ceramic particles, and maleic anhydride grafted ethylene-octene copolymer are dried separately so that the moisture content of each component is less than 0.5%; among them, the piezoelectric ceramic particles are nano-barium titanate with the brand M575 produced by Guangzhou Hongwu Material Technology Co., Ltd.

[0062] Weighing 70% of the dried ethylene-octene copolymer, 10% of carbon nanotubes, 5% of graphene quantum dots, 5% of piezoelectric ceramic particles, and 10% of maleic anhydride-grafted ethylene-octene copolymer by mass fraction, and mixing them uniformly to obtain a mixed material, wherein the mixing speed is 800-1200 r / min and the mixing time is 10-20 min;

[0063] The mixed material is added into a twin-screw extruder, and artificial turf is obtained through melt blending and extrusion molding. The temperature of each section of the twin-screw extruder is set to 160-180°C in the feeding section, 200-220°C in the melting section, 220-240°C in the homogenizing section, 230-250°C in the extrusion section, and the screw speed is 300-500r / min.

[0064] Comparative Example 1: 100% ethylene-octene copolymer was used to prepare artificial turf yarn. The specific steps can be referred to Example 1.

[0065] Comparative Example 2: 95% ethylene-octene copolymer and 5% carbon nanotubes were used to prepare artificial turf yarn. Specific steps can refer to Example 1.

[0066] Comparative Example 3: 95% ethylene-octene copolymer and 5% graphene quantum dots were used to prepare artificial turf. Specific steps can refer to Example 1.

[0067] Performance Test Method Description

[0068] Tensile strength test: dumbbell-shaped specimens were prepared according to ISO 527 standard method, and tensile test was carried out on a universal material testing machine. The stress-strain curve was recorded and the tensile strength was calculated.

[0069] Conductivity test: Cut the artificial grass sample into a cuboid of a certain size, place electrodes at both ends, use a conductivity tester, apply a certain voltage at room temperature, measure the current of the sample, and calculate the conductivity according to Ohm's law.

[0070] Temperature sensor detection limit test: Place an artificial turf sample in a temperature-controlled test chamber and connect it to an electrical test system. Change the chamber temperature at a constant rate (e.g., 1-5°C / min) and measure the rate of change in the sample's resistance. The detection limit is defined as the temperature change at which the resistance change reaches 0.1%. Each sample is tested three times, and the lowest detection limit is used.

[0071] Pressure sensor response time test: A pressure sensor made of artificial turf fibers was placed between two parallel electrodes and connected to a data acquisition system. Different pressures were applied to the sensor, and the time required for the sensor output signal to reach 90% of its steady-state value was recorded. This was the response time. Each sample was tested five times, and the average value was taken.

[0072] The test results of tensile strength, conductivity, temperature sensing detection limit and pressure sensing response time of the above Examples 1-6 and Comparative Examples 1-3 are shown in the following table:

[0073]

[0074] The above description is merely a preferred embodiment of the present disclosure and an illustration of the technical principles employed. Those skilled in the art should understand that the scope of the invention herein is not limited to the technical solutions formed by the specific combination of the above-mentioned technical features, but also encompasses other technical solutions formed by any combination of the above-mentioned technical features or their equivalents without departing from the inventive concept. For example, a technical solution formed by replacing the above-mentioned features with (but not limited to) technical features with similar functions disclosed in this disclosure.

Claims

1. A composition for preparing artificial turf, characterized in that: The following components are included in the mass fraction: Ethylene-octene copolymer: 70%-85%; Carbon nanotubes: 7%-15%; Graphene quantum dots: 3%-5%; Piezoelectric ceramic particles: 0%-5%; Maleic anhydride grafted ethylene-octene copolymer: 5%-10%.

2. The composition for preparing artificial turf according to claim 1, characterized in that: The following components are included in the mass fraction: Ethylene-octene copolymer: 70%-80%; Carbon nanotubes: 7%-10%; Graphene quantum dots: 4%-5%; Piezoelectric ceramic particles: 4%-5%; Maleic anhydride grafted ethylene-octene copolymer: 5%-10%.

3. The composition for preparing artificial turf according to claim 1, characterized in that: The density of the ethylene-octene copolymer is 0.8-1.0 g / cm 3 , the melt mass flow rate is 0.5-3.0g / 10min.

4. The composition for preparing artificial turf according to claim 1, characterized in that The carbon nanotubes are multi-walled carbon nanotubes with an outer diameter of 10-30 nm and a length of 1-5 μm.

5. The composition for preparing artificial turf according to claim 1, characterized in that: The graphene quantum dots have a particle size of 1-5 nm, a layer number of 1-3, and a content of oxygen-containing functional groups of not less than 20%.

6. The composition for preparing artificial turf according to claim 1, characterized in that: The piezoelectric ceramic particles include one or more of nano-scale barium titanate, lead zirconate titanate and lead titanate.

7. The composition for preparing artificial turf according to claim 1, characterized in that: The invention also comprises 0.5-2% of an antibacterial agent, which is nano silver particles or chitosan antibacterial agent.

8. The composition for preparing artificial turf according to claim 1, characterized in that: The invention also comprises 1-3% of an ultraviolet absorber, wherein the ultraviolet absorber is a benzotriazole, benzophenone or substituted acrylonitrile ultraviolet absorber.

9. Artificial turf yarn prepared from the composition for preparing artificial turf yarn according to any one of claims 1 to 8.

10. A method for preparing artificial turf according to claim 9, characterized in that: The following steps are involved: The ethylene-octene copolymer, carbon nanotubes, graphene quantum dots, piezoelectric ceramic particles, and maleic anhydride grafted ethylene-octene copolymer are dried respectively; The dried components are mixed evenly according to the corresponding mass fractions to obtain a mixed material, wherein the mixing speed is 800-1200 r / min and the mixing time is 10-20 min; The mixed material is added into a twin-screw extruder, and artificial turf is obtained through melt blending and extrusion molding. The temperature of each section of the twin-screw extruder is set to 160-180°C in the feeding section, 200-220°C in the melting section, 220-240°C in the homogenizing section, 230-250°C in the extrusion section, and the screw speed is 300-500r / min.

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