High-wear-resistance PET modified material and preparation method thereof

Abstract

The invention provides a high-wear-resistance PET modified material and a preparation method thereof. The high-wear-resistance PET modified material comprises the following components in parts by weight: 80-90 parts of a PET base material, 5-10 parts of a wear-resistant reinforcing agent, 5-8 parts of a compatilizer, 2-5 parts of a lubricant, 1-2 parts of a nucleating agent, 2-3 parts of nano filler, 3-5 parts of a modified polymer, 2-3 parts of a toughening agent, 1-2 parts of a flame retardant, 0.5-1 part of an antibacterial agent and 0.5-1 part of an antistatic agent. According to the invention, by adding the wear-resistant reinforcing agent, the wear resistance of the PET base material is improved, so that the material can maintain a long service life under the action of external force such as friction and wear, and the risk of performance reduction or failure caused by wear is reduced; and the material has the advantages in application scenes needing to bear high-frequency friction and wear. By adding the modified polymer and the toughening agent, the toughness of the material is further improved on the basis of keeping the original strength of the PET base material, so that the material can better absorb and disperse energy when being impacted by external force, and the risk of brittle fracture is reduced.

Description

Technical Field

[0001] The invention relates to a PET modified material, in particular to a highly wear-resistant PET modified material and a preparation method thereof, belonging to the technical field of PET materials. Background Art

[0002] The full name of PET material is polyethylene terephthalate, which is a thermoplastic polyester known for its excellent performance and wide range of applications. It is a highly crystalline polymer generated by the polycondensation reaction of terephthalic acid and ethylene glycol. It is usually milky white or light yellow, with a smooth and glossy surface. PET material has good mechanical properties, its impact strength is 3 to 5 times that of other films, and its folding resistance is also quite good. At the same time, it is also resistant to oil, fat, dilute acid and alkali, as well as most solvents, and has excellent high and low temperature resistance. It can be used for a long time within the temperature range of 120°C, and can withstand high temperatures of 150°C and low temperatures of -70°C in the short term. The mechanical properties remain stable under these temperature conditions. In addition, PET material also has low gas and water vapor permeability, showing excellent gas, water, oil and odor resistance. Its high transparency can block ultraviolet rays and its gloss is also quite good. More importantly, PET material is non-toxic and odorless, with high hygiene and safety, and is very suitable for direct use in food packaging, such as mineral water bottles, carbonated beverage bottles, and the outer packaging of many daily chemical products.

[0003] Although PET materials have excellent heat resistance, chemical stability and transparency, their wear resistance is often unsatisfactory in application scenarios that need to withstand frequent friction or scratches. When PET materials are scratched by sharp objects, scratches or wear easily appear on the surface, which not only affects the appearance of the material, but also shortens its service life. This lack of wear resistance limits the application of PET materials in certain fields, especially in situations where high wear resistance is required. For this reason, a highly wear-resistant PET modified material and a preparation method thereof are proposed. Summary of the invention

[0004] In view of this, the present invention provides a highly wear-resistant PET modified material and a preparation method thereof to solve or alleviate one of the technical problems existing in the prior art and at least provide a beneficial choice.

[0005] The technical solution of the embodiment of the present invention is implemented as follows: a highly wear-resistant PET modified material comprises the following components in parts by weight: 80-90 parts of PET substrate, 5-10 parts of wear-resistant enhancer, 5-8 parts of compatibilizer, 2-5 parts of lubricant, 1-2 parts of nucleating agent, 2-3 parts of nanofiller, 3-5 parts of modified polymer, 2-3 parts of toughening agent, 1-2 parts of flame retardant, 0.5-1 parts of antibacterial agent and 0.5-1 parts of antistatic agent.

[0006] Further preferably, the wear-resistant reinforcing agent is one or a combination of glass fiber or polyether-modified polysilicon wear-resistant additive, and the glass fiber is impregnated with polytetrafluoroethylene.

[0007] Further preferably, the compatibilizer is one or a combination of two or more of ethylene grafted maleic anhydride, ethylene-ethyl acrylate-glycidyl methacrylate copolymer or a grafted copolymer of thermoplastic elastomer SEBS.

[0008] Further preferably, the lubricant is one or a combination of two or more of calcium stearate, zinc stearate, stearamide, oleamide, ethylene bisstearamide or oxidized polyethylene.

[0009] Further preferably, the nucleating agent is one or a combination of two or more of calcium formate, the third generation sorbitol nucleating agent DMDBS, benzene trimesic acid metal complex or adamantane tetracarboxylic acid metal complex.

[0010] Further preferably, the nanofiller is one or a combination of two or more of nano-silicon dioxide, nano-calcium carbonate, nano-zinc oxide, nano-montmorillonite or nano-titanium dioxide, and the modified polymer is one of polycarbonate or polyphenylene sulfide.

[0011] Further preferably, the toughening agent is one of ethylene butyl acrylate or ethylene octene elastomer, and the flame retardant is one of decabromodiphenylethane, brominated polystyrene, triphenyl phosphate, tricresyl phosphate, triethyl phosphate, sodium antimonate, and zinc stannate, or a combination of two or more thereof.

[0012] Further preferably, the antibacterial agent is one or two or more of dodecyl dimethyl benzyl ammonium chloride, glutaraldehyde, tea polyphenols, and chitosan, and the antistatic agent is one or two or more of stearic acid monoglyceride, sodium dodecyl sulfate, polyethylene glycol, or lithium polystyrene sulfonate.

[0013] In addition, the present invention also provides a method for preparing a highly wear-resistant PET modified material, which is applied to a highly wear-resistant PET modified material and comprises the following steps:

[0014] Step 1: Take an appropriate amount of PET substrate by weight and send it into a drying device for drying. The dried substrate is heated and dissolved at a dissolving temperature of 200-250°C. After dissolution, it is sent into a mixing device, and a wear-resistant enhancer and a compatibilizer are added in sequence. The mixture is fully stirred and mixed. The speed of the mixing device is 1500-2000r / min, and the mixing time is 10-15 minutes.

[0015] Step 2: heating the mixed product to 300-320°C, adding lubricant, nucleating agent, nanofiller, modified polymer, toughening agent, flame retardant, antibacterial agent and antistatic agent to the mixed product in sequence, stirring and mixing thoroughly, with the rotating speed of the mixing equipment being 1800-2500r / min and the mixing time being 20-30 minutes;

[0016] Step 3: The mixed material is fed into a twin-screw extruder for high-temperature melting, extrusion, and granulation to obtain a highly wear-resistant PET modified material.

[0017] Further preferably, in step three, the extrusion temperature of the twin-screw extruder is 210-230° C., and the speed of the twin-screw extruder is 200-300 rpm.

[0018] The embodiment of the present invention has the following advantages due to the adoption of the above technical solution:

[0019] 1. The present invention improves the wear resistance of the PET substrate by adding a wear-resistant reinforcing agent, so that the material can maintain a longer service life when subjected to external forces such as friction and wear, reducing the risk of performance degradation or failure due to wear, so that the PET modified material has advantages in application scenarios that need to withstand high-frequency friction and wear, such as mechanical equipment parts, automotive parts, etc.

[0020] Second, the present invention further improves the toughness of the material by adding modified polymers and toughening agents while maintaining the original strength of the PET substrate, so that the material can better absorb and disperse energy when subjected to external force impact, reducing the risk of brittle fracture. The combination of high strength and toughness enables the material to maintain stable performance when subjected to heavy loads, impacts and other harsh working conditions, ensuring the safe operation of the equipment.

[0021] The above summary is for illustrative purposes only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments and features described above, further aspects, embodiments and features of the present invention will be readily apparent by reference to the accompanying drawings and the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or technical descriptions will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 is a flow chart of the present invention; DETAILED DESCRIPTION

[0024] The embodiments of the present disclosure are described in detail below with reference to the accompanying drawings.

[0025] It should be clear that the following embodiments of the present disclosure are described by specific specific examples, and those skilled in the art can easily understand other advantages and effects of the present disclosure from the contents disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of the present disclosure, rather than all of the embodiments. The present disclosure can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present disclosure. It should be noted that the following embodiments and features in the embodiments can be combined with each other in the absence of conflict. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present disclosure.

[0026] It should be noted that various aspects of the embodiments within the scope of the appended claims are described below. It should be apparent that the aspects described herein may be embodied in a wide variety of forms, and any specific structure and / or function described herein is merely illustrative. Based on the present disclosure, it should be understood by those skilled in the art that an aspect described herein may be implemented independently of any other aspect, and two or more of these aspects may be combined in various ways. For example, any number of aspects described herein may be used to implement the device and / or practice the method. In addition, other structures and / or functionalities other than one or more of the aspects described herein may be used to implement this device and / or practice this method.

[0027] It should also be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present disclosure. The drawings only show components related to the present disclosure rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed arbitrarily, and the component layout may also be more complicated.

[0028] Additionally, in the following description, specific details are provided to facilitate a thorough understanding of the examples. However, it will be understood by those skilled in the art that the aspects described may be practiced without these specific details.

[0029] Example 1

[0030] like Figure 1As shown, an embodiment of the present invention provides a highly wear-resistant PET modified material, comprising the following components in parts by weight: 80 parts of PET substrate, 5 parts of wear-resistant enhancer, 5 parts of compatibilizer, 2 parts of lubricant, 1 part of nucleating agent, 2 parts of nanofiller, 3 parts of modified polymer, 2 parts of toughening agent, 1 part of flame retardant, 0.5 parts of antibacterial agent and 0.5 parts of antistatic agent.

[0031] In this embodiment, specifically: the wear-resistant reinforcing agent is glass fiber, and the glass fiber is impregnated with polytetrafluoroethylene. Polytetrafluoroethylene (PTFE) itself has excellent wear resistance, especially it can still maintain good wear resistance under high temperature and mechanical stress. After the glass fiber is impregnated with polytetrafluoroethylene, its surface is covered with a layer of wear-resistant PTFE coating, which further enhances its wear resistance.

[0032] In this embodiment, specifically: the compatibilizer is ethylene grafted maleic anhydride, and ethylene grafted maleic anhydride can improve the compatibility between the PET substrate and the glass fiber by introducing a strong polar reactive group. At the same time, the ethylene grafted maleic anhydride compatibilizer can improve the heat resistance and mechanical strength of the PET material, thereby enhancing its wear resistance.

[0033] In this embodiment, specifically: the lubricant is calcium stearate, which can reduce the friction resistance of the PET material during the processing, making the material easier to flow and form, and at the same time can form a lubricating film in the PET material to reduce the friction and wear of the material during use.

[0034] In this embodiment, specifically: the nucleating agent is calcium formate, which can provide heterogeneous nucleation sites for PET, so that the PET molecular chains are orderly arranged around the calcium formate to form crystal nuclei, thereby increasing the crystallization rate of PET, making the molecular chains more tightly arranged and orderly, enhancing the intermolecular forces, and thus improving the mechanical properties of the material.

[0035] In this embodiment, specifically: the nano filler is nano silicon dioxide, which has a three-dimensional network structure and can form a network structure in PET, thereby increasing the strength, toughness and wear resistance of PET. The network structure enables the PET material to better resist external erosion when subjected to friction or wear, thereby extending the service life. The modified polymer is polycarbonate, which itself has excellent wear resistance, has a high surface hardness, and can resist scratches and wear. When polycarbonate is added to PET as a modified polymer, the wear resistance of the PET material can be effectively improved, making it more durable.

[0036] In this embodiment, specifically: the toughening agent is ethylene butyl acrylate, which can enable the PET material to better absorb and disperse energy when impacted, thereby avoiding the rupture or damage of the material; the flame retardant is decabromodiphenylethane, and when the PET modified material encounters a fire source, decabromodiphenylethane can quickly decompose and release bromine free radicals, capture free radicals in the combustion chain reaction, thereby interrupting the combustion process and achieving the purpose of flame retardancy.

[0037] In this embodiment, specifically: the antibacterial agent is dodecyl dimethyl benzyl ammonium chloride. Dodecyl dimethyl benzyl ammonium chloride, as a highly efficient cationic surfactant, has a broad-spectrum and highly efficient bactericidal ability. The antistatic agent is stearic acid monoglyceride. Stearic acid monoglyceride can form a uniform film on the surface of the PET material, effectively reducing the surface charge density, thereby reducing the accumulation and generation of static electricity, making it difficult for the PET modified material to generate static electricity during friction, contact, etc., avoiding various problems caused by static electricity, such as dust adsorption, electric shock, etc.

[0038] The present embodiment provides a method for preparing a highly wear-resistant PET modified material, comprising the following steps:

[0039] Step 1: Take an appropriate amount of PET substrate according to weight and send it into a drying device for drying. The dried substrate is heated and dissolved at a dissolving temperature of 200°C. After dissolution, it is sent into a mixing device, and a wear-resistant enhancer and a compatibilizer are added in sequence. The mixture is fully stirred and mixed. The speed of the mixing device is 1500r / min and the mixing time is 10 minutes.

[0040] Step 2: Heat the mixed product to 300° C., add lubricant, nucleating agent, nanofiller, modified polymer, toughening agent, flame retardant, antibacterial agent and antistatic agent to the mixed product in sequence, stir and mix thoroughly, the mixing equipment speed is 1800 r / min, and the mixing time is 20 minutes;

[0041] Step 3: The mixed material is fed into a twin-screw extruder for high-temperature melting, extrusion, and granulation to obtain a highly wear-resistant PET modified material. The extrusion temperature of the twin-screw extruder is 210° C. and the speed of the twin-screw extruder is 200 rpm.

[0042] Example 2

[0043] like Figure 1 As shown, an embodiment of the present invention provides a highly wear-resistant PET modified material, comprising the following components in parts by weight: 90 parts of PET substrate, 10 parts of wear-resistant enhancer, 8 parts of compatibilizer, 5 parts of lubricant, 2 parts of nucleating agent, 3 parts of nanofiller, 5 parts of modified polymer, 3 parts of toughening agent, 2 parts of flame retardant, 1 part of antibacterial agent and 1 part of antistatic agent.

[0044] In this embodiment, specifically: the wear-resistant enhancer is a polyether-modified polysilicone wear-resistant additive, which can increase the hardness of the surface of the PET material and improve its wear resistance, so that the PET material can better resist wear and extend its service life when subjected to external forces such as friction and scratches. At the same time, it can also improve the scratch resistance of the PET material, ensuring that the PET material is not easily scratched or damaged when scratched by sharp objects, thereby maintaining a smooth and beautiful surface.

[0045] In this embodiment, specifically: the compatibilizer is a graft copolymer of thermoplastic elastomer SEBS, and the graft copolymer of thermoplastic elastomer SEBS helps the polyether modified polysilicone wear-resistant additive to be evenly dispersed in the PET substrate, avoiding agglomeration and phase separation, thereby improving the overall performance and stability of the modified PET material.

[0046] In this embodiment, specifically: the lubricant is oxidized polyethylene, which has good lubricating properties. When added to the PET modified material as a lubricant, it can reduce the friction coefficient between the materials. Its lubricating effect also helps to indirectly enhance the wear resistance of the PET modified material. By reducing friction and wear, the oxidized polyethylene can protect the material surface from damage, thereby extending the service life of the material.

[0047] In this embodiment, specifically: the nucleating agent is adamantane tetracarboxylic acid metal complex, which, as a nucleating agent, can reduce the crystallization temperature of PET, increase the crystallization rate, and help obtain a PET material with higher crystallinity in a shorter processing cycle, thereby improving the mechanical properties and heat resistance of the material.

[0048] In this embodiment, specifically: the nano filler is nano titanium dioxide. Due to its extremely small size and high surface activity, the nano titanium dioxide particles can be evenly dispersed in the PET substrate and effectively fill the tiny gaps inside the material, thereby enhancing the density and hardness of the PET material, so that the PET material can better resist damage and improve wear resistance when subjected to external forces such as friction and wear. At the same time, nano titanium dioxide can improve the material's anti-ultraviolet performance and protect the material from damage by ultraviolet rays. The modified polymer is polyphenylene sulfide. Polyphenylene sulfide itself has excellent wear resistance, and its hardness and wear resistance are very high. Adding it to PET can improve the wear resistance of the composite material.

[0049] In this embodiment, specifically: the toughening agent is ethylene octene elastomer, and the flame retardant is zinc stannate. Ethylene octene elastomer has excellent toughness, and the octene segment in its molecular structure gives the material good softness and elasticity. When added to PET as a toughening agent, the toughness of the PET material can be improved, making it more resistant to external impact and stress, thereby extending the service life of the material.

[0050] In this embodiment, specifically: the antibacterial agent is tea polyphenols, which have an inhibitory effect on various microorganisms such as bacteria, molds, yeasts, etc., can reduce or eliminate microbial contamination on the surface of the material, and improve the hygiene and safety of the product; the antistatic agent is lithium polystyrene sulfonate, which, as a highly efficient antistatic agent, can reduce the surface resistance of PET materials and effectively prevent the generation and accumulation of static electricity.

[0051] The present embodiment provides a method for preparing a highly wear-resistant PET modified material, comprising the following steps:

[0052] Step 1: Take an appropriate amount of PET substrate according to weight and send it into a drying device for drying. The dried substrate is heated and dissolved at a dissolving temperature of 250°C. After dissolution, it is sent into a mixing device, and a wear-resistant enhancer and a compatibilizer are added in sequence. The mixture is fully stirred and mixed. The speed of the mixing device is 2000r / min and the mixing time is 15 minutes.

[0053] Step 2: Heat the mixed product to 320° C., add lubricant, nucleating agent, nanofiller, modified polymer, toughening agent, flame retardant, antibacterial agent and antistatic agent to the mixed product in sequence, stir and mix thoroughly, the mixing equipment speed is 2500 r / min, and the mixing time is 30 minutes;

[0054] Step 3: The mixed material is fed into a twin-screw extruder for high-temperature melting, extrusion, and granulation to obtain a highly wear-resistant PET modified material. The extrusion temperature of the twin-screw extruder is 230° C. and the speed of the twin-screw extruder is 300 rpm.

[0055] Example 3

[0056] like Figure 1 As shown, an embodiment of the present invention provides a highly wear-resistant PET modified material, comprising the following components in parts by weight: 85 parts of PET substrate, 8 parts of wear-resistant enhancer, 6 parts of compatibilizer, 3 parts of lubricant, 2 parts of nucleating agent, 3 parts of nanofiller, 4 parts of modified polymer, 3 parts of toughening agent, 1 part of flame retardant, 1 part of antibacterial agent and 1 part of antistatic agent.

[0057] In this embodiment, specifically: the wear-resistant reinforcing agent is a combination of glass fiber and polyether modified polysilicone wear-resistant additive, the glass fiber is impregnated with polytetrafluoroethylene, and the combination of glass fiber and polyether modified polysilicone wear-resistant additive is used as a wear-resistant reinforcing agent in the production process of highly wear-resistant PET modified materials, which can improve the wear resistance of the material and enhance the overall performance.

[0058] In this embodiment, specifically: the compatibilizer is a combination of ethylene grafted maleic anhydride and a graft copolymer of thermoplastic elastomer SEBS. Using the combination of ethylene grafted maleic anhydride and a graft copolymer of thermoplastic elastomer SEBS as a compatibilizer in the production process of high wear-resistant PET modified materials can improve the compatibility and dispersibility of the material, enhance the material performance and optimize the processing performance.

[0059] In this embodiment, specifically: the lubricant is a combination of calcium stearate and oxidized polyethylene.

[0060] In this embodiment, specifically: the nucleating agent is a combination of calcium formate and adamantane tetracarboxylic acid metal complex.

[0061] In this embodiment, specifically: the nano filler is a combination of nano silicon dioxide and nano titanium dioxide, and the modified polymer is polycarbonate.

[0062] In this embodiment, specifically: the toughening agent is ethylene butyl acrylate, and the flame retardant is a combination of decabromodiphenylethane and zinc stannate.

[0063] In this embodiment, specifically: the antibacterial agent is a combination of dodecyl dimethyl benzyl ammonium chloride and tea polyphenols, and the antistatic agent is a combination of stearic acid monoglyceride and lithium polystyrene sulfonate.

[0064] The present embodiment provides a method for preparing a highly wear-resistant PET modified material, comprising the following steps:

[0065] Step 1: Take an appropriate amount of PET substrate according to weight and send it into a drying device for drying. The dried substrate is heated and dissolved at a dissolving temperature of 220°C. After dissolution, it is sent into a mixing device, and a wear-resistant enhancer and a compatibilizer are added in sequence. The mixture is fully stirred and mixed. The speed of the mixing device is 1600r / min, and the mixing time is 12 minutes.

[0066] Step 2: Heat the mixed product to 310° C., add lubricant, nucleating agent, nanofiller, modified polymer, toughening agent, flame retardant, antibacterial agent and antistatic agent to the mixed product in sequence, stir and mix thoroughly, the mixing equipment speed is 2000 r / min, and the mixing time is 25 minutes;

[0067] Step 3: The mixed material is sent into a twin-screw extruder for high-temperature melting, extrusion, and granulation to obtain a highly wear-resistant PET modified material. The extrusion temperature of the twin-screw extruder is 220° C. and the speed of the twin-screw extruder is 250 rpm.

[0068] Example 4

[0069] like Figure 1As shown, an embodiment of the present invention provides a highly wear-resistant PET modified material, comprising the following components in parts by weight: 95 parts of PET substrate, 10 parts of wear-resistant enhancer, 7 parts of compatibilizer, 3 parts of lubricant, 2 parts of nucleating agent, 2 parts of nanofiller, 3 parts of modified polymer, 2 parts of toughening agent, 1 part of flame retardant, 0.5 parts of antibacterial agent and 0.5 parts of antistatic agent.

[0070] In this embodiment, specifically: the wear-resistant reinforcing agent is a combination of glass fiber and polyether-modified polysilicon wear-resistant additive, and the glass fiber is impregnated with polytetrafluoroethylene.

[0071] In this embodiment, specifically: the compatibilizer is a combination of ethylene grafted maleic anhydride, ethylene-ethyl acrylate-glycidyl methacrylate copolymer and a graft copolymer of thermoplastic elastomer SEBS.

[0072] In this embodiment, specifically: the lubricant is a combination of calcium stearate, oleamide and oxidized polyethylene.

[0073] In this embodiment, specifically: the nucleating agent is a combination of calcium formate, the third generation sorbitol nucleating agent DMDBS, and adamantane tetracarboxylic acid metal complex.

[0074] In this embodiment, specifically: the nano filler is a combination of nano silicon dioxide, nano calcium carbonate and nano titanium dioxide, and the modified polymer is polyphenylene sulfide.

[0075] In this embodiment, specifically: the toughening agent is ethylene octene elastomer, and the flame retardant is a combination of decabromodiphenylethane, brominated polystyrene and zinc stannate.

[0076] In this embodiment, specifically: the antibacterial agent is a combination of dodecyl dimethyl benzyl ammonium chloride, tea polyphenols and chitosan, and the antistatic agent is a combination of stearic acid monoglyceride, sodium dodecyl sulfate and lithium polystyrene sulfonate.

[0077] The present embodiment provides a method for preparing a highly wear-resistant PET modified material, comprising the following steps:

[0078] Step 1: Take an appropriate amount of PET substrate according to weight and send it into a drying device for drying. The dried substrate is heated and dissolved at a dissolving temperature of 230°C. After dissolution, it is sent into a mixing device, and a wear-resistant enhancer and a compatibilizer are added in sequence. The mixture is fully stirred and mixed. The speed of the mixing device is 1800r / min and the mixing time is 15 minutes.

[0079] Step 2: Heat the mixed product to 310° C., add lubricant, nucleating agent, nanofiller, modified polymer, toughening agent, flame retardant, antibacterial agent and antistatic agent to the mixed product in sequence, stir and mix thoroughly, the mixing equipment speed is 2200 r / min, and the mixing time is 28 minutes;

[0080] Step 3: The mixed material is fed into a twin-screw extruder for high-temperature melting, extrusion, and granulation to obtain a highly wear-resistant PET modified material. The extrusion temperature of the twin-screw extruder is 230° C. and the speed of the twin-screw extruder is 300 rpm.

[0081] The present invention improves the wear resistance of the PET substrate by adding a wear-resistant reinforcing agent, so that the material can maintain a longer service life when subjected to external forces such as friction and wear, reducing the risk of performance degradation or failure due to wear, and making the PET modified material have advantages in application scenarios that need to withstand high-frequency friction and wear, such as mechanical equipment parts, automotive parts, etc.

[0082] The present invention further improves the toughness of the material by adding modified polymers and toughening agents while maintaining the original strength of the PET substrate, so that the material can better absorb and disperse energy when subjected to external force impact, reducing the risk of brittle fracture. The combination of high strength and toughness enables the material to maintain stable performance when subjected to heavy loads, impacts and other harsh working conditions, ensuring the safe operation of the equipment.

[0083] It should be noted that each embodiment in this specification is described in a progressive manner, and each embodiment focuses on the differences from other embodiments, and the same or similar parts between the embodiments can be referred to each other. For system embodiments, since they are basically similar to method embodiments, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment.

[0084] For detailed description of this embodiment, reference may be made to the corresponding descriptions in the aforementioned embodiments, which will not be repeated here.

[0085] The basic principles of the present disclosure are described above in conjunction with specific embodiments. However, it should be noted that the advantages, strengths, effects, etc. mentioned in the present disclosure are only examples and not limitations, and it cannot be considered that these advantages, strengths, effects, etc. are required by each embodiment of the present disclosure. In addition, the specific details disclosed above are only for the purpose of illustration and ease of understanding, and are not limitations. The above details do not limit the present disclosure to the necessity of adopting the above specific details to be implemented.

[0086] In the present disclosure, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is any such actual relationship or order between these entities or operations. The block diagrams of the devices, devices, equipment, and systems involved in the present disclosure are only illustrative examples and are not intended to require or imply that they must be connected, arranged, and configured in the manner shown in the block diagram. As will be appreciated by those skilled in the art, these devices, devices, equipment, and systems can be connected, arranged, and configured in any manner. Words such as "including", "comprising", "having", etc. are open words, referring to "including but not limited to", and can be used interchangeably with them. The words "or" and "and" used here refer to the words "and / or" and can be used interchangeably with them, unless the context clearly indicates otherwise. The words "such as" used here refer to the phrase "such as but not limited to", and can be used interchangeably with them.

[0087] Additionally, as used herein, "or" used in a list of items beginning with "at least one" indicates a separate list, so that, for example, a list of "at least one of A, B, or C" means A or B or C, or AB or AC or BC, or ABC (i.e., A and B and C). Furthermore, the word "exemplary" does not mean that the example described is preferred or better than other examples.

[0088] It should also be noted that in the system and method of the present disclosure, each component or each step can be decomposed and / or recombined. Such decomposition and / or recombination should be regarded as equivalent solutions of the present disclosure.

[0089] Various changes, substitutions, and modifications of the techniques described herein may be made without departing from the teachings defined by the appended claims. Furthermore, the scope of the claims of the present disclosure is not limited to the specific aspects of the processes, machines, manufactures, compositions of events, means, methods, and actions described above. Currently existing or later to be developed processes, machines, manufactures, compositions of events, means, methods, or actions that perform substantially the same functions or achieve substantially the same results as the corresponding aspects described herein may be utilized. Thus, the appended claims include such processes, machines, manufactures, compositions of events, means, methods, or actions within their scope.

[0090] The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use the present disclosure. Various modifications to these aspects will be readily apparent to those skilled in the art, and the general principles defined herein may be applied to other aspects without departing from the scope of the present disclosure. Therefore, the present disclosure is not intended to be limited to the aspects shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

[0091] The above description has been given for the purpose of illustration and description. In addition, this description is not intended to limit the embodiments of the present disclosure to the forms disclosed herein. Although multiple example aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, changes, additions and sub-combinations thereof.

Claims

1. A highly wear-resistant PET modified material, characterized in that: The invention comprises the following components in parts by weight: 80-90 parts of PET substrate, 5-10 parts of wear-resistant enhancer, 5-8 parts of compatibilizer, 2-5 parts of lubricant, 1-2 parts of nucleating agent, 2-3 parts of nano filler, 3-5 parts of modified polymer, 2-3 parts of toughening agent, 1-2 parts of flame retardant, 0.5-1 parts of antibacterial agent and 0.5-1 parts of antistatic agent.

2. A highly wear-resistant PET modified material according to claim 1, characterized in that: The wear-resistant reinforcing agent is one or a combination of glass fiber or polyether-modified polysilicon wear-resistant additive, and the glass fiber is impregnated with polytetrafluoroethylene.

3. A highly wear-resistant PET modified material according to claim 1, characterized in that: The compatibilizer is one or a combination of two or more of ethylene grafted maleic anhydride, ethylene-ethyl acrylate-glycidyl methacrylate copolymer or thermoplastic elastomer SEBS grafted copolymer.

4. A highly wear-resistant PET modified material according to claim 1, characterized in that: The lubricant is one or a combination of two or more of calcium stearate, zinc stearate, stearamide, oleamide, ethylene bisstearamide or oxidized polyethylene.

5. The highly wear-resistant PET modified material according to claim 1, characterized in that: The nucleating agent is one or a combination of two or more of calcium formate, the third generation sorbitol nucleating agent DMDBS, benzene trimesic acid metal complex or adamantane tetracarboxylic acid metal complex.

6. A highly wear-resistant PET modified material according to claim 1, characterized in that: The nano filler is one of nano silicon dioxide, nano calcium carbonate, nano zinc oxide, nano montmorillonite or nano titanium dioxide or a combination of two or more thereof; the modified polymer is one of polycarbonate or polyphenylene sulfide.

7. The highly wear-resistant PET modified material according to claim 1, characterized in that: The toughening agent is one of ethylene butyl acrylate or ethylene octene elastomer, and the flame retardant is one of decabromodiphenylethane, brominated polystyrene, triphenyl phosphate, tricresyl phosphate, triethyl phosphate, sodium antimonate, and zinc stannate, or a combination of two or more thereof.

8. The highly wear-resistant PET modified material according to claim 1, characterized in that: The antibacterial agent is one or two or more of dodecyl dimethyl benzyl ammonium chloride, glutaraldehyde, tea polyphenols, and chitosan; the antistatic agent is one or two or more of stearic acid monoglyceride, sodium dodecyl sulfate, polyethylene glycol, or lithium polystyrene sulfonate.

9. A method for preparing a highly wear-resistant PET modified material, applied to a highly wear-resistant PET modified material as claimed in any one of claims 1 to 8, characterized in that: The following steps are involved: Step 1: Take an appropriate amount of PET substrate by weight and send it into a drying device for drying. The dried substrate is heated and dissolved at a dissolving temperature of 200-250°C. After dissolution, it is sent into a mixing device, and a wear-resistant enhancer and a compatibilizer are added in sequence. The mixture is fully stirred and mixed. The speed of the mixing device is 1500-2000r / min, and the mixing time is 10-15 minutes. Step 2: heating the mixed product to 300-320°C, adding lubricant, nucleating agent, nanofiller, modified polymer, toughening agent, flame retardant, antibacterial agent and antistatic agent to the mixed product in sequence, stirring and mixing thoroughly, with the rotating speed of the mixing equipment being 1800-2500r / min and the mixing time being 20-30 minutes; Step 3: The mixed material is fed into a twin-screw extruder for high-temperature melting, extrusion, and granulation to obtain a highly wear-resistant PET modified material.

10. The method for preparing a highly wear-resistant PET modified material according to claim 9, characterized in that: In step three, the extrusion temperature of the twin-screw extruder is 210-230° C., and the speed of the twin-screw extruder is 200-300 rpm.

Images