Wear-resistant plastic particles and preparation method thereof

Abstract

The invention discloses wear-resistant plastic particles and a preparation method thereof, and relates to the technical field of plastic particles. Comprising the following raw materials in parts by mass: 70-90 parts of polypropylene, 80-100 parts of polyethylene, 6-8 parts of friction-increasing filler, 1-2 parts of polyol ester, 1-2 parts of calcium stearate, 2-3 parts of polyamide, 1-2 parts of a plasticizer, 1-2 parts of a high-impact-resistance toughening agent, 1-3 parts of a hydrophobic polymer, 2-3 parts of an antioxidant and 2-4 parts of an adhesive. When the plastic particles are manufactured, a mixed substance composed of silicon dioxide, glass fibers, carbon fibers and nano-particles is adopted as a friction increasing filler to be matched with the high-impact-resistance toughening agent, so that the wear resistance of the plastic particles can be effectively improved, and the wear resistance of the plastic particles is improved while the wear resistance is improved. Therefore, the plastic particles have wear resistance and also have various properties such as good flame retardance, supporting property and hydrophobicity.

Description

Technical Field

[0001] The invention relates to the technical field of plastic particles, in particular to wear-resistant plastic particles and a preparation method thereof. Background Art

[0002] Plastic granules are a type of plastic material granules made by a special process. Their main function is to provide wear resistance, anti-slip, and cushioning properties, so that the finished product can maintain stable performance under various environmental conditions. Its surface is smooth and firm, and can withstand long-term high-intensity use without being easily worn. It also has good anti-slip properties, which can effectively reduce the risk of falling during exercise. At the same time, its soft texture can cushion impact and reduce sports injuries. It is widely used in sports venues, industrial products, automotive parts, electronic equipment, and building materials.

[0003] Currently, plastic particles are widely used in many fields due to their advantages such as light weight, easy processing and corrosion resistance. However, traditional plastic particles have obvious deficiencies in wear resistance, especially in high-friction and high-load environments. They are prone to wear and scratches, which seriously affect the service life of the product. Summary of the invention

[0004] The object of the present invention is to provide a wear-resistant plastic particle and a preparation method thereof to solve the technical problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solution: a wear-resistant plastic particle, comprising the following raw materials in parts by weight: 70-90 parts of polypropylene, 80-100 parts of polyethylene, 6-8 parts of friction-increasing filler, 1-2 parts of polyol ester, 1-2 parts of calcium stearate, 2-3 parts of polyamide, 1-2 parts of plasticizer, 1-2 parts of high impact toughening agent, 1-3 parts of hydrophobic polymer, 2-3 parts of antioxidant and 2-4 parts of adhesive.

[0006] Preferably, the friction-increasing filler comprises silica, glass fiber, carbon fiber and nanoparticles, and the mass percentage of the silica, glass fiber, carbon fiber and nanoparticles in the friction-increasing filler is 1:1:2:1.

[0007] Preferably, the plasticizer includes epoxidized soybean oil and polyethylene wax, and the mass percentage of the epoxidized soybean oil and the polyethylene wax in the plasticizer is 2:3.

[0008] Preferably, the high impact toughening agent comprises acrylate and methyl methacrylate-ethyl acrylate copolymer, and the mass percentage of the acrylate and methyl methacrylate-ethyl acrylate copolymer in the high impact toughening agent is 3:4.

[0009] Preferably, the hydrophobic polymer is mainly a thermoplastic elastomer, the antioxidant includes polytetrafluoroethylene, graphite and molybdenum disulfide, and the mass percentage of the polytetrafluoroethylene, graphite and molybdenum disulfide in the hydrophobic polymer is 2:1.

[0010] Preferably, the adhesive is a mixture of nano glue and water-based adhesive, and the mass percentage of the nano glue and the water-based adhesive in the adhesive is 11:13.

[0011] A method for preparing wear-resistant plastic particles comprises the following steps: S1: Weigh the raw materials according to the mass fraction; S2: Preparation of plastic body, making plastic raw materials; S3: Adding and mixing materials, adding the raw materials to be added into the plastic raw materials in sequence and stirring and mixing; S4: Raise the temperature and stir, and continue stirring until all components are fully mixed; S5: preparing the wear-resistant plastic into wear-resistant plastic particles, and performing molding treatment on the prepared wear-resistant plastic.

[0012] Preferably, after the raw materials in S1 are weighed, they are subjected to impurity removal treatment, and the impurity-free raw materials are placed in the prepared containers in sequence. Before the production of S2, polypropylene and polyethylene are obtained from the container prepared in S1, and the polypropylene and polyethylene are put into a mixing device. The mixing time is 30 minutes and the mixing temperature is 60°C to obtain plastic raw materials.

[0013] Preferably, S3 obtains the remaining raw materials from the container in S1, first puts the friction-increasing filler, high impact toughening agent, and hydrophobic polymer into a mixing device for mixing, and after the preliminary mixing, puts polyol ester, calcium stearate, and polyamide into the mixture for mixing and stirring, and finally puts in plasticizer, antioxidant, and adhesive for stirring.

[0014] Preferably, S4 raises the temperature inside the mixing device to 80 degrees Celsius and continuously stirs the mixture inside until all the mixture is evenly mixed. In S5, a granulator is used to make the evenly mixed materials in S4 into wear-resistant plastic particles.

[0015] Compared with the prior art, the present invention has the following beneficial effects: When preparing plastic particles in the present invention, polypropylene and polyethylene are mixed to prepare the plastic particles, which can effectively improve the functionality of the plastic particles. A mixed substance composed of silicon dioxide, glass fiber, carbon fiber and nanoparticles is used as a friction-increasing filler, and is matched with a high impact toughening agent made of acrylic acid ester and methyl methacrylate-ethyl acrylate copolymer, which can effectively improve the wear resistance of the plastic particles. While improving the wear resistance, the functionality of the plastic particles is further enhanced, so that the plastic particles have multiple properties such as good flame retardancy, support and hydrophobicity while having wear resistance. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The figure is a schematic diagram of the preparation process of wear-resistant plastic particles of the present invention. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] See also Figure 1 The present invention provides a technical solution: a wear-resistant plastic particle and a preparation method thereof, comprising the following steps: S1: weigh the raw materials, including 80 parts of polypropylene, 90 parts of polyethylene, 7 parts of friction-increasing fillers, 1 part of polyol ester, 1 part of calcium stearate, 1 part of polyamide, 1 part of plasticizer, 1 part of high impact toughening agent, 2 parts of hydrophobic polymer, 3 parts of antioxidant, and 3 parts of adhesive. After the raw materials are weighed, remove impurities and place the raw materials after the removal of impurities in the prepared container in turn to ensure that the raw materials are clean and free of impurities, so as to ensure the purity of the plastic particles after subsequent mixing and facilitate the molding of the plastic particles; S2: Preparation of plastic body, after obtaining 80 parts of polypropylene and 90 parts of polyethylene from the container prepared in S1, 80 parts of polypropylene and 90 parts of polyethylene are put into a mixing device together, and the polypropylene and polyethylene are heated and melted in an environment with a temperature of 60°C, and continuously stirred and mixed for 30 minutes to obtain a uniformly mixed plastic raw material, wherein polypropylene and polyethylene are both raw materials for making plastic particles, and polypropylene has the advantages of good toughness, heat resistance and corrosion resistance, and polyethylene has the advantages of good cold resistance, corrosion resistance and high strength. The two are mixed to make plastic particles, which can effectively improve the functionality of the plastic particles; S3: Add and mix. Get the remaining raw materials from the container in S1. Put 7 parts of friction-increasing fillers composed of silica, glass fiber, carbon fiber and nanoparticles in a mass percentage of 1:1:2:1, 1 part of high impact toughening agent composed of acrylate and methyl methacrylate-ethyl acrylate copolymer in a mass percentage of 3:4, and 2 parts of hydrophobic polymer made of thermoplastic elastomer into a mixing device for mixing. The addition of silica can improve the strength, wear resistance and aging resistance of plastic particles, while keeping the color unchanged for a long time, and can be flame retardant. Glass fiber can enhance the rigidity and hardness of plastic particles, improve heat resistance and heat deformation temperature, improve dimensional stability, and reduce warping deformation and creep. Carbon fiber has the advantages of light weight, high strength, very high specific modulus and specific strength, high acid and alkali resistance, good corrosion resistance, and low thermal expansion coefficient. Nanoparticles can improve the hardness, adhesion, weather resistance of plastic particles, as well as improve the toughness and rigidity of plastics. After the initial mixing is completed, 1 part of polyol ester, 1 part of calcium stearate and 1 part of polyamide are added to the mixture for mixing and stirring. Polyol ester can improve the flexibility and processability of plastic particles, and at the same time enhance their cold resistance and aging resistance. Calcium stearate can help plastic products to be smoothly removed from the mold, reduce product defects and mold damage, and make plastic products easier to process and shape. Polyamide has excellent properties such as high strength, high toughness and wear resistance, which can further enhance the wear resistance of plastic particles; Finally, 1 part of plasticizer composed of epoxidized soybean oil and polyethylene wax in a mass ratio of 2:3 is added to reduce the conversion temperature of the glass fiber raw material in the plastic, making the hard plastic soft and elastic, and can also reduce the melt viscosity of the plastic and the elastic modulus of the elastomer, thereby improving the processing performance of the plastic particles; 3 parts of antioxidant composed of acrylate and methyl methacrylate-ethyl acrylate copolymer in a mass ratio of 3:4 is added to reduce the oxidation rate of the material during processing and use, delay the aging and degradation of the plastic particles, thereby maintaining the excellent performance of the plastic particles and their products and extending their service life; and 3 parts of adhesive composed of nano glue and water-based adhesive in a mass ratio of 11:13 are stirred. The adhesive can effectively connect various raw materials together, ensure their stability during processing and use, and is conducive to the rapid molding of plastic particles in the later stage; S4: heating and stirring, raising the temperature inside the mixing device to 80 degrees Celsius, the high temperature accelerates the melting and mixing of the raw materials, and continuously stirring the internal mixture so that each raw material is fully dispersed and mixed after melting, until all the mixture is evenly mixed; S5: the wear-resistant plastic is made into wear-resistant plastic granules, and the material mixed evenly in S4 is made into wear-resistant plastic granules by a granulator.

[0019] In summary, the method for preparing wear-resistant plastic particles, before preparation, first weigh a certain mass fraction of raw materials, and remove impurities from the raw materials and place them in a container for standby. During preparation, the operator obtains polypropylene and polyethylene from the container, and puts the two into the mixing device, heats them to 60°C, and stirs for 30 minutes, then raises the temperature inside the mixing device to 80 degrees Celsius, and first puts the friction-increasing filler, high impact toughening agent, and hydrophobic polymer into the mixing device for mixing. After the preliminary mixing is completed, polyol ester, calcium stearate and polyamide are added to the mixture for mixing and stirring, and finally a plasticizer, an antioxidant and an adhesive are added for stirring and mixing. After all the raw materials are stirred and mixed, the materials mixed evenly by a granulator are made into wear-resistant plastic particles. The contents not described in detail in this description belong to the prior art known to professional and technical personnel in this field.

[0020] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A wear-resistant plastic particle, characterized in that: Including the following raw materials by mass: 70-90 parts of polypropylene, 80-100 parts of polyethylene, 6-8 parts of friction-increasing filler, 1-2 parts of polyol ester, 1-2 parts of calcium stearate, 2-3 parts of polyamide, 1-2 parts of plasticizer, 1-2 parts of high impact toughening agent, 1-3 parts of hydrophobic polymer, 2-3 parts of antioxidant and 2-4 parts of adhesive.

2. The wear-resistant plastic particles according to claim 1, characterized in that: The friction-increasing filler comprises silica, glass fiber, carbon fiber and nanoparticles, and the mass percentage of the silica, glass fiber, carbon fiber and nanoparticles in the friction-increasing filler is 1:1:2:

1.

3. The wear-resistant plastic particles according to claim 1, characterized in that: The plasticizer includes epoxidized soybean oil and polyethylene wax, and the mass percentage of the epoxidized soybean oil and the polyethylene wax in the plasticizer is 2:

3.

4. The wear-resistant plastic particles according to claim 1, characterized in that: The high impact toughening agent comprises acrylate and methyl methacrylate-ethyl acrylate copolymer, and the mass percentage of the acrylate and methyl methacrylate-ethyl acrylate copolymer in the high impact toughening agent is 3:

4.

5. The wear-resistant plastic particles according to claim 1, characterized in that: The hydrophobic polymer is mainly a thermoplastic elastomer, the antioxidant includes polytetrafluoroethylene, graphite and molybdenum disulfide, and the mass percentage of the polytetrafluoroethylene, graphite and molybdenum disulfide in the hydrophobic polymer is 2:

1.

6. The wear-resistant plastic particles according to claim 1, characterized in that: The adhesive is a mixture of nano glue and water-based adhesive, and the mass percentage of the nano glue and the water-based adhesive in the adhesive is 11:

13.

7. A method for preparing wear-resistant plastic particles, characterized in that: The following steps are involved: S1: Weigh the raw materials according to the mass fraction; S2: Preparation of plastic body, making plastic raw materials; S3: Adding and mixing materials, adding the raw materials to be added into the plastic raw materials in sequence and stirring and mixing; S4: Raise the temperature and stir, and continue stirring until all components are fully mixed; S5: preparing the wear-resistant plastic into wear-resistant plastic particles, and performing molding treatment on the prepared wear-resistant plastic.

8. A method for preparing wear-resistant plastic particles according to claim 7, characterized in that: After the raw materials in S1 are weighed, they are subjected to impurity removal treatment, and the impurity-removed raw materials are placed in the prepared containers in sequence. Before the production of S2, polypropylene and polyethylene are obtained from the container prepared in S1, and the polypropylene and polyethylene are put into a mixing device. The mixing time is 30 minutes and the mixing temperature is 60°C to obtain plastic raw materials.

9. The method for preparing wear-resistant plastic particles according to claim 7, characterized in that: The S3 obtains the remaining raw materials from the container in S1, first puts the friction-increasing filler, high impact toughening agent, and hydrophobic polymer into a mixing device for mixing, and after the initial mixing, puts polyol ester, calcium stearate, and polyamide into the mixture for mixing and stirring, and finally puts in plasticizer, antioxidant, and adhesive for stirring.

10. The method for preparing wear-resistant plastic particles according to claim 7, characterized in that: In S4, the temperature inside the mixing device is raised to 80 degrees Celsius, and the mixture inside is continuously stirred until all the mixture is evenly mixed. In S5, a granulator is used to make the evenly mixed materials in S4 into wear-resistant plastic particles.

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