Preparation method of high wear-resistant TPE

Abstract

This invention relates to a method for preparing high abrasion-resistant TPE, comprising: preparing raw materials; pretreating the raw materials; mixing TPE base resin microparticles and solid particle additives in a certain proportion; quantitatively inputting TPE base resin microparticles and solid particle additives into a mixing device during mixing; maintaining the mixing device at 70 degrees Celsius for 5-10 minutes during mixing; finally cooling the mixing device to room temperature; cooling the mixed solid particles in the device to room temperature and then outputting them to obtain a solid mixed raw material; extruding the solid mixed raw material with other raw materials to produce products of the required shape and size; cooling, curing, and cutting the products, thereby achieving premixing of the solid particle additives with the TPE base resin microparticles before raw material mixing, and allowing the solid particle additives to adhere to the TPE base resin microparticles during premixing, facilitating rapid and sufficient contact between the TPE base resin and the solid particle additives during mixing and extrusion.

Description

Technical Field

[0001] This invention relates to a method for preparing a high abrasion-resistant TPE, and particularly to a method for preparing a high abrasion-resistant TPE applicable to the field of TPE preparation methods. Background Technology

[0002] Thermoplastic elastomers are plastic materials with high elasticity and processability. They combine the characteristics of traditional elastomers and thermoplastics, and have advantages such as good plasticity, good weather resistance, and recyclability, making them a widely used engineering material in the automotive, electronics, medical, and home appliance industries.

[0003] Compared to traditional elastomers, TPEs have better processing properties and can be manufactured into various shapes through injection molding, extrusion molding, blow molding, and other methods. Furthermore, TPEs are recyclable, which is beneficial for environmental protection and resource conservation.

[0004] To address the issue of abrasion resistance, a certain TPE preparation method on the market incorporates additives that enhance abrasion resistance, and it holds a certain market share.

[0005] Chinese invention patent CN202211476843.X discloses a high-wear-resistant TPE material and its preparation method. This invention involves adding raw materials in a high-speed mixer according to a specified ratio, mixing and shaking until homogeneous, and letting it stand for 24 hours. The mixture is then fed into a parallel twin-screw extruder and extruded and granulated to obtain the TPE material. This invention uses ultra-high molecular weight SEBS as a matrix and incorporates polypropylene. Modified heavy calcium carbonate is added to the raw materials, ultimately resulting in a TPE material with high mechanical properties, strong wear resistance, and flame retardant properties, possessing extremely high application value and a wider range of applications.

[0006] In the current manufacturing process of high-wear-resistant TPE materials, additives are mostly added after the TPE base resin has melted. However, solid particulate additives often need to be thoroughly mixed and dispersed with the molten TPE resin to function. However, because solid particulate additives typically have a large size and low surface activity, their dispersibility with the molten TPE resin may be poor, making it difficult to achieve uniform dispersion during the mixing process.

[0007] Furthermore, when mixing solid particulate additives with TPE resin, the melting temperature needs to be increased to reach the melting point of the additives to ensure thorough mixing with the resin. However, this may lead to an increase in the viscosity of the molten TPE resin, making the mixing process more difficult. Application content

[0008] The technical problem that this invention aims to solve in view of the above-mentioned prior art is that the existing TPE base resin is not easy to be fully mixed with solid particulate additives during the compounding process.

[0009] To address the above problems, this invention provides a method for preparing high abrasion-resistant TPE, specifically comprising:

[0010] A1. Prepare raw materials, including TPE base resin, filler and solid particle additive; the filler includes one or more of glass fiber, carbon black and aluminum silicate; the solid particle additive includes one or more of calcium silicate particles, silicate particles and ceramic particles. The melting temperature of the TPE base resin surface in this solution is 70 degrees Celsius.

[0011] A2. Pre-treatment of raw materials: First, the TPE base resin is dried, and then pulverized to obtain TPE base resin microparticles.

[0012] A3. Mix TPE base resin microparticles and solid particle additives in a certain proportion; when mixing, quantitatively input TPE base resin microparticles and solid particle additives into the mixing device; when quantitatively inputting, first put the TPE base resin microparticles into the mixing device, and the TPE base resin microparticles are heated and dispersed by the spiral hot air flow in the mixing device. When the TPE base resin microparticles are heated to 50-60 degrees Celsius.

[0013] Solid granular additives are added and mixed under the drive of hot air flow at 70-80 degrees Celsius. The mixing device is maintained at 70 degrees Celsius for 5-10 minutes. Finally, the mixing device is cooled to room temperature. The solid granules mixed in the device are cooled to room temperature and then output to obtain solid mixed raw materials.

[0014] A4. After mixing solid raw materials with other raw materials, extrusion process is carried out to produce products of the required shape and size;

[0015] A5. Cool, solidify, and cut the product to obtain the final product.

[0016] In the above preparation method, it is possible to premix the solid particulate additive with the TPE base resin microparticles before the raw materials are mixed, and the solid particulate additive can be attached to the TPE base resin microparticles during the premixing process.

[0017] As a further improvement to this application, the mass ratio of TPE base resin microparticles to solid particle additives in the raw materials of step A3 includes 1:3 to 1:10.

[0018] As a further improvement of this application, the particle size of the solid particulate additives is 10-50 micrometers, and the particle size of the TPE base resin microparticles is 200-500 micrometers.

[0019] As a further improvement of this application, the mixing device includes a mixer body, an air inlet pipe, an exhaust pipe and a powder conveying device installed on the mixer body, an agitator installed inside the mixer body, and a mixing feeder installed at the top of the mixer body. The mixing feeder includes a mixing chamber and multiple metering feeders are connected to the mixing chamber. The mixing device facilitates the metering input of TPE base resin and facilitates the heating and stirring of TPE base resin.

[0020] As a further improvement to this application, the input end of the mixing chamber is connected to an air pump with a heating device, the output end of the mixing chamber is equipped with a powder nozzle located inside the mixer body, and the input end of the mixing feeder can be supplied with hot air to facilitate the heating of the solid particulate additive in the mixing chamber, and the solid particulate additive is output to the mixer body through the hot air.

[0021] As a further improvement to this application, the output end of the intake pipe is connected to an electromagnetic three-way valve, and the two input ends of the electromagnetic three-way valve are respectively connected to a cold air inlet pipe and a hot air inlet pipe, so as to facilitate heating and cooling of the internal environment of the mixer body through hot air and cold air.

[0022] As another improvement of this application, it also includes a premixing system, which includes a controller connected to the mixer body, and a mixing feeder, a powder conveying device, a solenoid three-way valve, a metering feeder and an air pump are all signal-connected to the controller.

[0023] In summary, this method allows for the premixing of solid granular additives with TPE base resin microparticles before raw material mixing. During premixing, the solid granular additives adhere to the TPE base resin microparticles, facilitating rapid and sufficient contact between the TPE base resin and the solid granular additives during mixing and extrusion. The TPE base resin in this solution is fully coated with solid granular additives before mixing, ensuring that the TPE base resin maintains sufficient contact with the solid granular additives even after melting. Attached Figure Description

[0024] Figure 1 This is a flowchart of the preparation method according to the first embodiment of this application;

[0025] Figure 2 This is a flowchart illustrating the mixing of TPE base resin and solid particulate additives according to the first embodiment of this application.

[0026] Figure 3 This is a diagram showing the state changes of the TPE base resin according to the first embodiment of this application;

[0027] Figure 4 This is a perspective view of the mixing device according to the first embodiment of this application;

[0028] Figure 5This is a system block diagram of the mixing device according to the first embodiment of this application.

[0029] Explanation of the labels in the diagram:

[0030] 1 Mixer body, 101 Air inlet pipe, 102 Exhaust pipe, 2 Agitator, 3 Mixing feeder, 4 Powder conveying device. Detailed Implementation

[0031] The two embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0032] First implementation method: Figure 1-3 As shown,

[0033] A method for preparing high abrasion-resistant TPE, the specific preparation method includes:

[0034] A1. Prepare raw materials, including TPE base resin, fillers and solid particle additives; fillers include glass fiber, carbon black and aluminum silicate; solid particle additives include calcium silicate particles and silicate particles, the melting temperature of the solid particle additives is greater than 70 degrees Celsius; the particle size of the solid particle additives is 40 micrometers.

[0035] A2. Pre-treatment of raw materials is carried out to ensure the stability and uniformity of raw materials. During the pre-treatment, the TPE base resin is first dried and then pulverized to obtain TPE base resin microparticles with a particle size of 400 micrometers.

[0036] A3. Mix the TPE base resin microparticles and solid particle additives in a certain proportion; when mixing, quantitatively input the TPE base resin microparticles and solid particle additives into the mixing device, with a mass ratio of TPE base resin microparticles to solid particle additives of 1:5.

[0037] When quantitatively inputting, TPE base resin microparticles are first added to the mixing device. The TPE base resin microparticles are heated and dispersed by the spiral hot air flow in the mixing device. When the TPE base resin microparticles are heated to 50 degrees Celsius.

[0038] Solid granular additives are added and mixed with the hot air flow at 70 degrees Celsius. The mixing device is maintained at 70 degrees Celsius for 10 minutes during mixing. Finally, the mixing device is cooled to room temperature. The solid granules mixed in the device are cooled to room temperature and then output to obtain solid mixed raw materials.

[0039] A4. After mixing the solid raw materials with other raw materials, the extrusion process is carried out. Other raw materials include wear-resistant TPE production raw materials other than particulate additives and TPE base resin, to make products of the required shape and size.

[0040] A5. Cool, solidify, and cut the product to obtain the final product.

[0041] This solution allows for the premixing of solid granular additives with TPE base resin microparticles before raw material mixing. During the premixing process, the solid granular additives adhere to the TPE base resin microparticles, facilitating rapid and sufficient contact between the TPE base resin and the solid granular additives during mixing and extrusion.

[0042] This embodiment uses solid particulate additives with smaller particle size. The particle size ratio of the solid particulate additives to the TPE base resin particles is 1:10. At this time, more solid particulate additives can be attached to the TPE base resin particles. Furthermore, because the solid particulate additives have smaller particle size, the TPE base resin particles can be heated to 50 degrees Celsius, and their surfaces can come into contact with the hot airflow carrying the solid particulate additives with a lower degree of melting. The smaller particle size solid particulate additives are more likely to embed into the slightly soluble TPE base resin particles.

[0043] This embodiment makes it easy to ensure that the surface of the TPE base resin particles is fully covered by solid particulate additives, which facilitates the thorough mixing of solid particulate additives and TPE base resins during subsequent compounding.

[0044] Second implementation method:

[0045] Components that are the same as or corresponding to those in the first embodiment are referred to by the same reference numerals as those in the first embodiment. For simplicity, only the differences between the second and first embodiments are described below. The difference between the second and first embodiments is as follows:

[0046] A1. Prepare raw materials, including TPE base resin, filler and solid particle additive; filler includes carbon black; solid particle additive includes ceramic particles; the particle size of the solid particle additive is 50 micrometers, and the particle size of the TPE base resin particles is 300 micrometers.

[0047] A3. Mix the TPE base resin microparticles and solid particle additives in a certain proportion; when mixing, quantitatively input the TPE base resin microparticles and solid particle additives into the mixing device, with a mass ratio of TPE base resin microparticles to solid particle additives of 1:5.

[0048] When quantitatively inputting, TPE base resin microparticles are first added to the mixing device. The TPE base resin microparticles are heated and dispersed by the spiral hot air flow in the mixing device. When the TPE base resin microparticles are heated to 60 degrees Celsius;

[0049] Solid granular additives are added and mixed under the drive of a hot airflow at 70 degrees Celsius. The mixing device is maintained at 70 degrees Celsius for 5 minutes during mixing. Finally, the mixing device is cooled to room temperature, and the mixed solid granules are cooled to room temperature before being output to obtain solid mixed raw materials.

[0050] In this embodiment, a solid particle additive with a larger particle size is used. The particle size ratio of the solid particle additive to the TPE base resin microparticles is 1:6. This allows the TPE base resin microparticles to be heated to a higher base temperature. At this temperature, the surface of the TPE base resin microparticles has a higher degree of melting, making it easier for the large-sized solid particles to embed. The solid particle additive is then introduced into the mixing device by a hot airflow. The hot airflow driving the solid particle additive convects with the hot airflow maintaining the temperature of the TPE base resin microparticles, facilitating full contact between the TPE base resin microparticles and the solid particles. Furthermore, because the solid particles have a larger particle size, there are fewer solid particles that can be added to the TPE base resin microparticles. The time required for the solid particle additive to fully embed on the surface of the TPE base resin microparticles is shorter than in the first embodiment. The time required to maintain 70 degrees Celsius in the mixing device during particle mixing can also be shortened.

[0051] Compared to the first embodiment, this embodiment has a shorter mixing and processing time, and the solid particle additives attached to the surface of the TPE base resin microparticles have a larger particle size.

[0052] The third implementation method:

[0053] Components that are the same as or corresponding to those in the first embodiment are referred to by the same reference numerals as those in the first embodiment. For simplicity, only the differences between this third embodiment and the first embodiment are described below. The difference between this third embodiment and the first embodiment is that:

[0054] Figure 4-5 The mixing device includes a mixer body 1, on which a temperature sensor connected to a controller is mounted. An air inlet pipe 101, an exhaust pipe 102, and a powder conveying device 4 are mounted. The powder conveying device 4 can quantitatively convey TPE base resin particles. An electromagnetic three-way valve is connected to the output end of the air inlet pipe 101. The two input ends of the electromagnetic three-way valve are respectively connected to a cold air inlet pipe and a hot air inlet pipe, facilitating heating and cooling of the internal environment of the mixer body 1 through hot and cold air flows. The output end of the exhaust pipe 102 is aligned with the tangential direction of the inner wall of the mixer body 1, and an on / off valve is installed at the output end of the mixer body 1.

[0055] A stirrer 2 is installed inside the mixer body 1, and a mixing feeder 3 is installed at the top of the mixer body 1. The mixing feeder 3 includes a mixing chamber, and multiple metering feeders are connected to the mixing chamber. The multiple metering feeders are used for adding various solid granular additives.

[0056] The input end of the mixing chamber is connected to an air pump with a heating device, and the output end of the mixing chamber is equipped with a powder nozzle located inside the mixer body 1. The input end of the mixing feeder 3 can be supplied with hot air to facilitate the heating of the solid granular additive in the mixing chamber and output the solid granular additive to the mixer body 1 through the hot air.

[0057] It also includes a premixing system, which includes a controller connected to 1, a mixer feeder 3, a powder conveying device 4, a solenoid three-way valve, a metering feeder, and an air pump, all of which are signal-connected to the controller.

[0058] The mixing device of this embodiment facilitates the quantitative input of TPE base resin, and also facilitates the heating and stirring of TPE base resin, easily meeting the needs of processing adjustment.

[0059] In light of current practical needs, the above-described embodiments adopted in this application are not limited to this scope of protection. Various changes made within the knowledge of those skilled in the art without departing from the concept of this application still fall within the protection scope of this invention.

Claims

1. A method for preparing high abrasion-resistant TPE, characterized in that: Specific preparation methods include: A1. Prepare raw materials, including TPE base resin, fillers and solid particle additives; the fillers include one or more of glass fiber, carbon black and aluminum silicate; the solid particle additives include one or more of calcium silicate particles, silicate particles and ceramic particles. A2. Pre-treatment of raw materials: First, the TPE base resin is dried, and then pulverized to obtain TPE base resin microparticles. A3. Mix TPE base resin microparticles and solid particle additives in a certain proportion; when mixing, quantitatively input TPE base resin microparticles and solid particle additives into the mixing device; when quantitatively inputting, first put the TPE base resin microparticles into the mixing device, and the TPE base resin microparticles are heated and dispersed by the spiral hot air flow in the mixing device. When the TPE base resin microparticles are heated to 50-60 degrees Celsius. Solid granular additives are added and mixed under the drive of hot air flow at 70-80 degrees Celsius. The mixing device is maintained at 70 degrees Celsius for 5-10 minutes. Finally, the mixing device is cooled to room temperature. The solid granules mixed in the device are cooled to room temperature and then output to obtain solid mixed raw materials. The mixing device includes a mixer body (1), on which an air inlet pipe (101), an exhaust pipe (102), and a powder conveying device (4) are installed. A stirrer (2) is installed inside the mixer body (1). A mixing feeder (3) is installed at the top of the mixer body (1). The mixing feeder (3) includes a mixing chamber, on which multiple quantitative feeders are connected. The input end of the mixing chamber is connected to an air pump with a heating device. The output end of the mixing chamber is equipped with a powder nozzle located inside the mixer body (1). The output end of the air inlet pipe (101) is connected to an electromagnetic three-way valve. The two input ends of the electromagnetic three-way valve are respectively connected to a cold air inlet pipe and a hot air inlet pipe. A4. After mixing solid raw materials with other raw materials, extrusion process is carried out to produce products of the required shape and size; A5. Cool, solidify, and cut the product to obtain the final product.

2. The method for preparing a high abrasion-resistant TPE according to claim 1, characterized in that: The mass ratio of TPE base resin microparticles to solid particulate additives in the raw materials of step A3 includes 1:3 to 1:

10.

3. The method for preparing a high abrasion-resistant TPE according to claim 1, characterized in that: The particle size of the solid particulate additives is 10-50 micrometers, and the particle size of the TPE base resin microparticles is 200-500 micrometers.

4. The method for preparing a high abrasion-resistant TPE according to claim 1, characterized in that: It also includes a premixing system, which includes a controller connected to the mixer body (1), and the mixer feeder (3), powder conveying device (4), electromagnetic three-way valve, quantitative feeder and air pump are all connected to the controller.

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