Composite material for high-performance cone crusher lining plate and preparation method of composite material

Abstract

The invention belongs to the technical field of composite materials, and particularly relates to a composite material for a high-performance cone crusher lining plate and a preparation method of the composite material. The composite material is prepared from the following components in parts by weight: 70 to 90 parts of semi-aromatic polyamide, 20 to 30 parts of fiber reinforced filler, 10 to 20 parts of flexibilizer, 10 to 20 parts of brominated polystyrene, 10 to 15 parts of graphene, 1 to 5 parts of diatomite nanoparticles, 2 to 6 parts of metal compound flame-retardant aid, 0.5 to 3 parts of coupling agent, 0.5 to 3 parts of lubricant and 0.5 to 3 parts of antioxidant. The graphene and diatomite nanoparticles are added into the brominated polystyrene flame-retardant resin, so that the dispersity of brominated polystyrene and the compatibility of the brominated polystyrene and polyamide resin can be improved, the flame retardance and thermal stability of the composite material are improved, and the mechanical property of the composite material can be improved; and the use requirements of devices in equipment such as a cone crusher lining plate are met.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of composite materials, and particularly relates to a high-performance composite material for a conical breaking liner and a preparation method thereof. BACKGROUND

[0002] As one of the commonly used crushing equipment in the construction industry, the working principle of the conical crusher is to rely on the swing movement of the moving cone to cause the material to bear a large extrusion force and be crushed. The moving cone liner and the fixed cone liner are structures that directly contact the material, and long-term bear the extrusion force and friction force generated by relative sliding caused by the material, and the working environment is very harsh. Since the conical crusher works continuously, the parts thereof need to have high mechanical properties to maintain stability. Although the metal substrate parts have good stability, they are high in price and difficult to process. As an easily processed material, polymer materials have been widely concerned in the field of mechanical equipment.

[0003] Polyamide, commonly known as nylon, is a general term for a class of high polymers containing a large number of amide bonds in the molecular chain. It belongs to semi-crystalline plastic, and the density of the crystal region is greater than that of the amorphous phase. The density is closely related to the crystallinity. When the content of methylene in the main chain increases or the content of amide bond decreases, the crystallinity and density of nylon decrease. Therefore, except for a small part of transparent nylon, most of the nylon is opaque and hard white particles. As the most widely used of the five engineering plastics, the polar amide bond contained in the molecular chain of nylon can form hydrogen bonds between molecules, making the molecular chain more regular. Therefore, the mechanical properties are excellent, and other properties such as heat resistance, chemical corrosion resistance, self-lubricating property, barrier property and electrical insulation property are also superior to similar materials, so that nylon and its modified materials are widely used in the fields of automobiles, medical treatment, aerospace, machinery, electrical equipment and packaging. The synthesis method of nylon mainly includes two kinds: one is the dehydration condensation reaction of diamin and diacid; the other is the ring-opening reaction of lactam or the polycondensation of amino acid. According to the difference of repeating unit, it is mainly divided into three categories of aliphatic polyamide, semi-aromatic polyamide and wholly aromatic polyamide.

[0004] The molecular chain of aliphatic polyamide is composed of linear structure of alternating arrangement of amide groups and methylene. The length of methylene segment affects the flexibility of the material, and when the number of methylene is more than 5, the low-temperature impact resistance is significantly enhanced. The hydrogen bonding between amide groups forms a three-dimensional network structure, which gives the material high strength and adjustable moisture absorption performance. The wholly aromatic polyamide refers to the polyamide containing benzene rings in the polymer monomers, and the main representatives are poly-m-phenylene isophthalamide, poly-p-phenylene terephthalamide and the like. The benzene ring content in the molecular chain of such polyamide is high, the material has high temperature resistance, high mechanical strength and large modulus, the content of amide bond in the molecular chain is low, the water absorption rate is low, and the dimensional stability of the product is also good. However, due to the high content of benzene ring in the molecular chain, the melting temperature is higher than the decomposition temperature, which is difficult to melt and process, and the production cost is high. Such materials are mostly processed by solution spinning, and the prepared fibers have excellent heat resistance, high strength, impact resistance and other properties, and are often used to prepare high-end products such as protective clothing, bulletproof equipment and the like. The semi-aromatic polyamide refers to the polyamide in which only one (diamine or diacid) contains benzene ring, that is, the polyamide polymer with partial aromatic ring structure prepared by polycondensation of aliphatic diamine or diacid with diacid or diamine containing benzene ring. With good heat resistance, mechanical properties, molding processing performance and low water absorption, semi-aromatic polyamide has been widely used in automobile engine peripheral parts, electronic connectors, LED supports, mechanical bearing retainer, weapon industry, aerospace and other fields. However, the flame retardance of polyamide is poor, which limits its application. Brominated polystyrene is a kind of excellent environmentally friendly flame retardant. However, when it is applied to polyamide, the flame retardance is limited due to compatibility problems, and the mechanical properties of polyamide composite material are easily reduced. SUMMARY

[0005] In order to solve the technical problems existing in the prior art, the present application provides a kind of high-performance composite material for conical breaking lining and a preparation method thereof, which further improves the flame retardant effect while maintaining the mechanical properties of the composite material, and has wide application in the field of mechanical equipment such as conical breaking lining.

[0006] The present application is realized by the following technical solutions: A kind of high-performance composite material for conical breaking lining, comprising the following components by weight fraction: Semi-aromatic polyamide 70-90 parts, fibrous reinforcing filler 20-30 parts, toughening agent 10-20 parts, brominated polystyrene 10-20 parts, graphene 10-15 parts, diatomite nanoparticles 1-5 parts, metal compound flame retardant additive 2-6 parts, coupling agent 0.5-3 parts, lubricant 0.5-3 parts, antioxidant 0.5-3 parts.

[0007] The benzene ring in the semi-aromatic polyamide macromolecular structure endows it with better mechanical properties, heat resistance and low water absorption than aliphatic polyamides, while the aliphatic segment makes it have the processing fluidity that all-aromatic polyamides lack, inherits the advantages of aliphatic polyamides and aromatic polyamides, and makes up for the shortcomings of both, so that it has excellent comprehensive performance. Therefore, the semi-aromatic polyamide can meet the dual requirements of material strength and toughness when it is selected as the base resin.

[0008] Brominated polystyrene belongs to the commonly used environmentally friendly bromine-containing flame retardant in the art. Further, the amount of brominated polystyrene is 12-17 parts, and an appropriate amount of brominated polystyrene can take into account the flame retardance and mechanical properties. The weight average molecular weight of commonly used brominated polystyrene is generally between 5000-250000, and the bromine content is generally 60%-70wt%. Specifically, the brominated polystyrene of Yaba Company SAYTEX HP-7010 can be selected for use. Brominated polystyrene has high flame retardant efficiency, small addition amount, good flame retardant effect, can reduce or even avoid personal and property losses caused by fire, and has high cost performance; and, the brominated polystyrene itself is composed of organic macromolecules, and no dioxin is generated in the high-temperature decomposition or combustion process, no harmful gas is generated, and the whole process from production to sales and use of the polymer bromine flame retardant is non-toxic and harmless, and is widely applied. However, in the melt processing process, brominated polystyrene and polyamide with greater polarity are prone to compatibility problems, leading to agglomeration or separation of brominated polystyrene, and further affecting the improvement of the mechanical strength and flame retardance of the composite material. In order to solve the above problems, a certain amount of graphene and diatomite nanoparticles are added in the present application.

[0009] Graphene is a two-dimensional nanomaterial composed of single-layer carbon atoms, arranged in a honeycomb structure with carbon hexagonal rings, and the lateral size is generally 1-10 pm. The special two-dimensional sheet structure of graphene can play an excellent physical barrier effect in brominated polystyrene flame-retardant polyamide resin and reduce the heat release rate, thereby playing a flame-retardant role. The carbon wall formed by the accumulation of graphene forms an excellent gas barrier layer, delaying the oxidative degradation of polyamide during ignition, in addition, the large specific surface area of graphene can induce the formation of a large number of dense carbon layers to prevent the resin matrix from further thermal decomposition. More importantly, during the processing process, the sheet structure of graphene can cooperate with the particulate nano diatomite to promote the dispersion of brominated polystyrene, improve the mechanical properties and flame retardant effect of the composite material. Diatomite is mainly composed of components such as silicon dioxide, has a special pore structure, relatively low density, large specific surface area and high chemical stability. The addition of diatomite nanoparticles can have the dual effect of improving component dispersion and improving flame retardancy. Diatomite mainly plays a flame-retardant role in the condensed phase, mainly increasing the thermal decomposition temperature of the material, reducing the thermal decomposition rate and reducing the heat release rate, etc., and the carbon layer formed can delay the thermal decomposition of the material and prevent the generated heat from conducting to the inside of the material, thereby achieving the effect of flame retardation; and the particulate structure can interact with the sheet-like graphene to promote the dispersion of each other; at the same time, the unique pore structure of diatomite can play an adsorption role, effectively improving the compatibility between components and further improving the dispersion degree of brominated polystyrene, improving the mechanical properties and flame retardant effect of the system.

[0010] In general, the addition of graphene and diatomite nanoparticles in brominated polystyrene flame-retardant polyamide resin can improve the dispersion of brominated polystyrene and the compatibility with polyamide resin, improve the flame retardancy and thermal stability of the composite material. At the same time, it can also improve the mechanical properties of the composite material to meet the requirements of the device in the conical breaker, especially the conical breaker plate equipment.

[0011] In an embodiment, the semi-aromatic polyamide is one or more of PA6T, PA6I, PA9T, PA9T / 66, PA10T, PA10T / 66, PA10T / 10I, PA10T / 1010, PA12T, PA12I. Further, semi-aromatic polyamides with long carbon fatty chains such as PA9T, PA9T / 66, PA10T, PA10T / 66, PA10T / 10I, PA10T / 1010, PA12T, PA12I, etc. can be selected. The long carbon chain semi-aromatic polyamide takes into account the strength and toughness of the polyamide, and can better meet the requirements of the sealing ring, gasket, bumper, shock absorber and other elements in the conical breaker, especially the conical breaker plate equipment.

[0012] In an embodiment, the fiber reinforced filler is glass fiber. The type of glass fiber is not particularly limited, and any commonly used in the art can be used.

[0013] In an embodiment, the toughening agent is one or more of maleic anhydride grafted polyethylene, maleic anhydride grafted polypropylene, maleic anhydride grafted EPDM, maleic anhydride grafted ethylene-octene copolymer, and maleic anhydride grafted SEBS.

[0014] In an embodiment, the mass ratio of graphene to diatomite nanoparticles is (3-6):1. The diatomite nanoparticles have no particular limitation on the particle size, and the volume average particle size D50 can be 50-1000 nm, further 100-800 nm, and more further 200-700 nm or 300-500 nm. The suitable diatomite particle size can better promote the dispersion of the flame-retardant component, improve the flame-retardant effect of brominated polystyrene, and on the other hand, the particles with suitable particle size can isolate the flaky graphene, promote the dispersion of graphene, and improve the mechanical properties of the composite material.

[0015] In an embodiment, the metal compound flame-retardant aid is antimony trioxide.

[0016] In an embodiment, the coupling agent is one or more of silane coupling agent and titanate coupling agent. The addition of the coupling agent can enhance the adhesion between the polyamide matrix and the inorganic filler, and improve the mechanical properties and dimensional stability of the composite material.

[0017] In an embodiment, the lubricant is one or more of talc, silicone oil, calcium stearate, zinc stearate, polytetrafluoroethylene, paraffin wax, and polyethylene wax.

[0018] In an embodiment, the antioxidant is one or more of hindered phenolic antioxidant and phosphite antioxidant. The addition of the antioxidant can improve the thermal stability of the components in the composite material, and prevent aging and decomposition during processing or use.

[0019] In another aspect, the application also provides a preparation method of the high-performance composite material for conical breaker plate, comprising the following steps: (1) uniformly mixing semi-aromatic polyamide, toughening agent, brominated polystyrene, graphene, diatomite nanoparticles, metal compound flame-retardant aid, coupling agent, lubricant, and antioxidant to obtain a mixture; (2) adding the mixture from the main feeding port into the twin-screw extruder, adding the fiber reinforced filler from the side feeding port into the twin-screw extruder, and extruding and granulating to obtain the high-performance composite material for conical breaker plate.

[0020] In an embodiment, the twin-screw extruder screw rotation speed is 300-600 r / min, and the extrusion temperature is 260-330 DEG C.

[0021] Advantages: The addition of graphene and diatomite nanoparticles in the brominated polystyrene flame-retardant polyamide resin can improve the dispersibility of the brominated polystyrene and the compatibility with the polyamide resin, improve the flame retardancy and thermal stability of the composite material, and at the same time, improve the mechanical properties of the composite material, so as to meet the use requirements of the device in the conical breaker, especially the conical breaker plate and other equipment. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the technical scheme of the embodiments of the present application is described clearly and completely below. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the described embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the present application. Unless otherwise defined, the technical terms or scientific terms used herein should be understood as the usual meanings understood by those skilled in the art in the field of the present application.

[0023] In the above embodiments and comparative examples, the types and preparation processes of the raw materials are the same unless otherwise specified. In the above embodiments and comparative examples, the semi-aromatic polyamide is polyamide 10T, the fiber reinforcing filler is glass fiber, the metal compound flame retardant additive is antimony trioxide, and the average lateral size of the graphene is 3 μm.

[0024] The preparation method of the high-performance composite material for conical breaker plate comprises the following steps: (1) uniformly mixing semi-aromatic polyamide, toughening agent, brominated polystyrene, graphene, diatomite nanoparticles, metal compound flame retardant additive, coupling agent, lubricant and antioxidant to obtain a mixture; (2) adding the mixture from the main feeding port into the twin-screw extruder, adding the fiber reinforcing filler from the side feeding port into the twin-screw extruder, and extruding and granulating to obtain the high-performance composite material for conical breaker plate; the screw rotation speed of the twin-screw extruder is 500 r / min, and the extrusion temperature is 320 DEG C.

[0025] Embodiment 1 A high-performance composite material for conical breaker plate comprises the following components in parts by weight: Semi-aromatic polyamide 70 parts, fiber reinforced filler 20 parts, toughening agent maleic anhydride grafted ethylene-octene copolymer 10 parts, brominated polystyrene 10 parts, graphene 10 parts, diatomite nanoparticles with an average particle size of 100 nm 1 part, metal compound flame retardant aid 2 parts, coupling agent KH-550 0.5 parts, lubricant calcium stearate 0.5 parts, antioxidant 1010 0.5 parts.

[0026] Example 2 A high-performance composite material for cone crusher liner plate comprises the following components in parts by weight: Semi-aromatic polyamide 90 parts, fiber reinforced filler 30 parts, toughening agent maleic anhydride grafted SEBS 20 parts, brominated polystyrene 18 parts, graphene 15 parts, diatomite nanoparticles with an average particle size of 700 nm 5 parts, metal compound flame retardant aid 6 parts, coupling agent KH-550 3 parts, lubricant talc 3 parts, antioxidant 1010 3 parts.

[0027] Example 3 A high-performance composite material for cone crusher liner plate comprises the following components in parts by weight: Semi-aromatic polyamide 80 parts, fiber reinforced filler 25 parts, toughening agent maleic anhydride grafted ethylene-octene copolymer 15 parts, brominated polystyrene 20 parts, graphene 12 parts, diatomite nanoparticles with an average particle size of 400 nm 2 parts, metal compound flame retardant aid 4 parts, coupling agent KH-550 2 parts, lubricant talc 2 parts, antioxidant 1010 2 parts.

[0028] Example 4 A high-performance composite material for cone crusher liner plate comprises the following components in parts by weight: Semi-aromatic polyamide 75 parts, fiber reinforced filler 22 parts, toughening agent maleic anhydride grafted SEBS 13 parts, brominated polystyrene 13 parts, graphene 12 parts, diatomite nanoparticles with an average particle size of 100 nm 2 parts, metal compound flame retardant aid 3 parts, coupling agent KH-550 1 part, lubricant calcium stearate 1 part, antioxidant 1010 1 part.

[0029] Example 5 A high-performance composite material for cone crusher liner plate comprises the following components in parts by weight: Semi-aromatic polyamide 80 parts, fiber reinforced filler 25 parts, toughening agent maleic anhydride grafted ethylene-octene copolymer 15 parts, brominated polystyrene 15 parts, graphene 12 parts, diatomite nanoparticles with an average particle size of 100 nm 2 parts, metal compound flame retardant aid 4 parts, coupling agent KH-550 2 parts, lubricant talc 2 parts, antioxidant 1010 2 parts.

[0030] Example 6 A high-performance composite material for conical breaking lining plate comprises the following components in parts by weight: Semi-aromatic polyamide 85 parts, fiber reinforced filler 27 parts, toughening agent maleic anhydride grafted SEBS 18 parts, brominated polystyrene 17 parts, graphene 14 parts, diatomite nanoparticles with an average particle size of 700 nm 4 parts, metal compound flame retardant aid 5 parts, coupling agent KH-550 2 parts, lubricant zinc stearate 2 parts, antioxidant 1010 2 parts.

[0031] Example 7 A high-performance composite material for conical breaking lining plate comprises the following components in parts by weight: Semi-aromatic polyamide 80 parts, fiber reinforced filler 25 parts, toughening agent maleic anhydride grafted ethylene-octene copolymer 15 parts, brominated polystyrene 15 parts, graphene 12 parts, diatomite nanoparticles with an average particle size of 700 nm 2 parts, metal compound flame retardant aid 4 parts, coupling agent KH-550 2 parts, lubricant talc 2 parts, antioxidant 1010 2 parts.

[0032] Example 8 A high-performance composite material for conical breaking lining plate comprises the following components in parts by weight: Semi-aromatic polyamide 79 parts, fiber reinforced filler 23.5 parts, toughening agent maleic anhydride grafted SEBS 16.5 parts, brominated polystyrene 14 parts, graphene 12.5 parts, diatomite nanoparticles with an average particle size of 400 nm 2.5 parts, metal compound flame retardant aid 3.3 parts, coupling agent KH-550 1.5 parts, lubricant talc 1.5 parts, antioxidant 1010 2.5 parts.

[0033] Example 9 A high-performance composite material for conical breaking lining plate comprises the following components in parts by weight: Semi-aromatic polyamide 84 parts, fiber reinforced filler 26 parts, toughening agent maleic anhydride grafted ethylene-octene copolymer 15.5 parts, brominated polystyrene 16.5 parts, graphene 11.5 parts, diatomite nanoparticles with an average particle size of 700 nm 3.5 parts, metal compound flame retardant aid 4.2 parts, coupling agent KH-550 2.2 parts, lubricant calcium stearate 1.8 parts, antioxidant 1010 2.1 parts.

[0034] Example 10 A high-performance composite material for conical breaking lining plate comprises the following components in parts by weight: Semi-aromatic polyamide 80 parts, fiber reinforced filler 25 parts, toughening agent maleic anhydride grafted ethylene-octene copolymer 15 parts, brominated polystyrene 15 parts, graphene 12 parts, diatomite nanoparticles with an average particle size of 400 nm 2 parts, metal compound flame retardant aid 4 parts, coupling agent KH-550 2 parts, lubricant talc 2 parts, antioxidant 1010 2 parts.

[0035] Comparative Example 1 A high-performance composite material for cone crusher liner plate comprises the following components in parts by weight: Semi-aromatic polyamide 80 parts, fiber reinforced filler 25 parts, toughening agent maleic anhydride grafted ethylene-octene copolymer 15 parts, brominated polystyrene 15 parts, graphene 14 parts, diatomite nanoparticles with an average particle size of 400 nm 0 parts, metal compound flame retardant aid 4 parts, coupling agent KH-550 2 parts, lubricant talc 2 parts, antioxidant 1010 2 parts.

[0036] Comparative Example 2 A high-performance composite material for cone crusher liner plate comprises the following components in parts by weight: Semi-aromatic polyamide 80 parts, fiber reinforced filler 25 parts, toughening agent maleic anhydride grafted ethylene-octene copolymer 15 parts, brominated polystyrene 15 parts, graphene 0 parts, diatomite nanoparticles with an average particle size of 400 nm 14 parts, metal compound flame retardant aid 4 parts, coupling agent KH-550 2 parts, lubricant talc 2 parts, antioxidant 1010 2 parts.

[0037] Comparative Example 3 A high-performance composite material for cone crusher liner plate comprises the following components in parts by weight: Semi-aromatic polyamide 80 parts, fiber reinforced filler 25 parts, toughening agent maleic anhydride grafted ethylene-octene copolymer 15 parts, brominated polystyrene 15 parts, graphene 2 parts, diatomite nanoparticles with an average particle size of 400 nm 12 parts, metal compound flame retardant aid 4 parts, coupling agent KH-550 2 parts, lubricant talc 2 parts, antioxidant 1010 2 parts.

[0038] The high-performance composite materials for cone crusher liner plate prepared in the above examples and comparative examples were injection molded into standard patterns, and their tensile strength was tested according to ISO 527, their bending strength was tested according to ISO 178, their notched impact strength was tested according to ISO 179, and their flame retardant performance was tested according to UL94, with the results shown in the following table: As can be seen from Table 1 and Table 2, the special two-dimensional sheet structure of graphene can play an excellent physical barrier effect in brominated polystyrene flame-retardant polyamide resin and reduce the heat release rate, thereby playing a flame-retardant effect. The carbon wall formed by the accumulation of graphene forms an excellent gas barrier layer, delaying the oxidative degradation of polyamide during ignition. In addition, the large specific surface area of graphene can induce the formation of a large number of dense carbon layers to prevent the resin matrix from further thermal decomposition. More importantly, during the processing, the sheet structure of graphene can cooperate with the particulate nano diatomite to promote the dispersion of brominated polystyrene and improve the mechanical properties and flame-retardant effect of the composite. The addition of diatomite nanoparticles can have the dual effects of improving component dispersion and improving flame retardancy. Diatomite mainly plays a flame-retardant effect in the condensed phase, mainly increasing the thermal decomposition temperature of the material, reducing the thermal decomposition rate and reducing the heat release rate, etc. The carbon layer formed can delay the thermal decomposition of the material and prevent the generated heat from conducting to the inside of the material, thereby achieving the effect of flame retardation. The particulate structure can interact with the sheet-like graphene to promote the dispersion of each other. At the same time, the unique pore structure of diatomite can play an adsorption effect, effectively improving the compatibility between components and further improving the dispersion degree of brominated polystyrene, improving the mechanical properties and flame-retardant effect of the system.

[0039] Specifically, compared with Example 10, Comparative Example 1 lacks diatomite nanoparticles, although the tensile strength of the composite changes little, but the impact toughness is greatly reduced. Comparative Example 2 lacks graphene components, and both the mechanical properties and the flame-retardant effect are greatly reduced. Comparative Examples 1 and 2 show that the lack of diatomite nanoparticles and graphene cannot effectively promote the dispersion of brominated polystyrene and the compatibility with polyamide resin. At the same time, the addition of diatomite nanoparticles or graphene alone also leads to poor dispersion of the filler, resulting in reduced flame retardancy and mechanical properties of the composite. As can be seen from Comparative Example 3, the addition of diatomite nanoparticles mainly improves the dispersion of components and improves the flame retardancy. When the amount of diatomite nanoparticles or graphene is not within the scope of the present application, the improvement is limited, neither can the flame-retardant reinforcing effect of graphene be played, nor can the dispersion effect of diatomite nanoparticles be realized, resulting in reduced performance of the composite.

[0040] The above examples are only used to illustrate the technical solutions of the present application, but not to limit it; although the present application has been described in detail with reference to the foregoing examples, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing examples, or make equivalent substitutions for part or all of the technical features; and these modifications or substitutions do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A composite material for high-performance conical breaker liners, characterized in that, The components include the following parts by weight: The ingredients are: 70-90 parts semi-aromatic polyamide, 20-30 parts fiber-reinforced filler, 10-20 parts toughening agent, 10-20 parts brominated polystyrene, 10-15 parts graphene, 1-5 parts diatomaceous earth nanoparticles, 2-6 parts metal compound flame retardant additive, 0.5-3 parts coupling agent, 0.5-3 parts lubricant, and 0.5-3 parts antioxidant.

2. The composite material for a high-performance conical breaker liner as described in claim 1, characterized in that, The semi-aromatic polyamide is one or more of PA6T, PA6I, PA9T, PA9T / 66, PA10T, PA10T / 66, PA10T / 10I, PA10T / 1010, PA12T, and PA12I.

3. The composite material for a high-performance conical breaker liner as described in claim 1, characterized in that, The fiber-reinforced filler is glass fiber.

4. The composite material for a high-performance conical breaker liner as described in claim 1, characterized in that, The toughening agent is one or more of maleic anhydride-grafted polyethylene, maleic anhydride-grafted polypropylene, maleic anhydride-grafted ethylene propylene diene monomer (EPDM) rubber, maleic anhydride-grafted ethylene-octene copolymer, and maleic anhydride-grafted SEBS.

5. The composite material for a high-performance conical breaker liner as described in claim 1, characterized in that, The metal compound flame retardant additive is antimony trioxide.

6. The composite material for a high-performance conical breaker liner as described in claim 1, characterized in that, The coupling agent is one or more of silane coupling agents and titanate coupling agents.

7. The composite material for a high-performance conical breaker liner as described in claim 1, characterized in that, The lubricant is one or more of the following: talc, silicone oil, calcium stearate, zinc stearate, polytetrafluoroethylene, paraffin wax, and polyethylene wax.

8. The composite material for a high-performance conical breaker liner as described in claim 1, characterized in that, The antioxidant is one or more of hindered phenolic antioxidants and phosphite antioxidants.

9. A method for preparing a high-performance conical breaker liner composite material as described in any one of claims 1-8, characterized in that, Includes the following steps: (1) Mix semi-aromatic polyamide, toughening agent, brominated polystyrene, graphene, diatomaceous earth nanoparticles, metal compound flame retardant, coupling agent, lubricant and antioxidant evenly to obtain a mixture; (2) The mixture is added into the twin-screw extruder from the main feed port, and the fiber-reinforced filler is added into the twin-screw extruder from the side feed port. The mixture is then extruded and granulated to obtain a high-performance conical breaker liner composite material.

10. A method for preparing a high-performance conical breaker liner composite material as described in claim 9, characterized in that, The twin-screw extruder has a screw speed of 300-600 r / min and an extrusion temperature of 260-330℃.

Images