Ultra-high molecular weight polyethylene composition and preparation method thereof

Abstract

The invention discloses an ultra-high molecular weight polyethylene composition and a preparation method thereof. The composition comprises the following components in parts by mass: 10-15 parts of industrial carbon black, 10-15 parts of modified montmorillonite, 5-10 parts of lignin, 8-12 parts of ammonium polyphosphate and / or melamine phosphate, 5-10 parts of nano aluminum hydroxide, 0.3-3 parts of a coupling agent, 0.5-6 parts of a flow modifier, 0.5-2 parts of a light stabilizer and 90-140 parts of an ultra-high molecular weight polyethylene base material. According to the invention, the montmorillonite which is rich in source and low in price is utilized in quantity, the environment-friendly value is obvious, the production cost of the flame-retardant ultra-high molecular weight polyethylene composition can be greatly reduced, the preparation process is simple, convenient and easy to implement, and the raw materials do not contain halogen, so that the flame-retardant ultra-high molecular weight polyethylene composition is more environment-friendly; the adverse effect on the environment and human health in the combustion environment is also reduced; meanwhile, the heat resistance, flame retardance, dripping resistance, smoke suppression performance and the like of the ultra-high molecular weight polyethylene material are also improved.

Description

Technical Field

[0001] The invention relates to the technical field of flame retardancy, and in particular to an ultra-high molecular weight polyethylene composition with flame retardancy and a preparation method thereof. Background Art

[0002] Ultra-high molecular weight polyethylene (UHMWPE) is a polymer compound, an unbranched linear polyethylene with a molecular weight of more than 1.5 million, which has been widely used in the fields of electronic appliances, new energy, military, mining machinery, artificial joints, etc. However, due to the richness of hydrocarbons, ultra-high molecular weight polyethylene produces black smoke or thick smoke when burning, and the melt drips, which will further expand the fire. The prospect of compounding low-cost, environmentally friendly flame retardant materials with polymer materials such as ultra-high molecular weight polyethylene to make composite flame retardant materials is relatively broad. However, some existing flame retardant materials have the problems of relatively high production costs, many products from petrochemical or organic synthesis routes, relatively complex ingredients (such as some compound organic flame retardants), and less than ideal environmental sustainability; some inorganic flame retardants have better flame retardant effects, but the amount added is relatively large, which makes the processing process more complicated, and also has a relatively large impact on the physical and mechanical properties of the material.

[0003] Chinese patent CN 107778638 A discloses a halogen-free flame-retardant ultra-high molecular weight polyethylene material and a preparation method thereof, using the following raw materials: ultra-high molecular weight polyethylene substrate, pyro (poly) phosphate piperazine, alkyl hypophosphite, coupling agent, light stabilizer, plasticizer, flow modifier and organic modified nano-scale inorganic filler. The flame-retardant ultra-high molecular weight polyethylene material prepared by the invention does not contain halogen, but the production cost is relatively high.

[0004] Chinese patent CN 106589458 A compounds expandable graphite, fly ash, polyether polyol, and isocyanate, adds a foaming agent and polydimethylsiloxane and / or silicone oil as a foam stabilizer, and prepares a flame retardant polyurethane foam, but the application occasions are relatively limited.

[0005] Chinese patent CN 101948581 A discloses an intumescent flame-retardant polyethylene containing an organosilicon compound, wherein the intumescent flame-retardant polyethylene containing an organosilicon compound also contains a metal oxide hydrate of an organosilicon flame retardant synergist, and the contents of each component by weight percentage are: polyethylene 70-80%, compound intumescent flame retardant 17-29.5%, and metal oxide hydrate containing an organosilicon flame retardant synergist 0.5-3%. The process is relatively complicated and the amount of flame retardant used is relatively high.

[0006] Chinese patent CN 110698873 A discloses a lignin / ammonium polyphosphate / wood powder / high-density polyethylene flame retardant composite material and its preparation method: the composite material includes the following components by mass: 5-30 parts of lignin, 5-30 parts of ammonium polyphosphate, 10-60 parts of wood powder and 30-60 parts of high-density polyethylene. It also includes the following components by mass: 1-3 parts of lubricant and 1-3 parts of coupling agent. This method uses high-density polyethylene to improve the flame retardant properties of wood-plastic composite materials. However, this method uses more ammonium polyphosphate and requires a larger amount of coupling agent, which is not conducive to environmental protection.

[0007] Chinese patent CN 110172237 A discloses a fire-resistant engineering plastic and a preparation method thereof, comprising the following raw materials: polycarbonate, organic modified montmorillonite, modified flame retardant, nano silicon dioxide, glass fiber, light stabilizer 770, polyethanol, ethylene bis stearamide, white carbon black, di(2,3-dichloropropyl)octyl phosphate, tri(neopentyl glycol phosphate)methylamine, silsesquioxane, vinyl triethoxysilane, hexachlorocyclotriphosphazene. However, this method uses more organic synthetic substances, the process technology is relatively complex, and the cost is relatively high.

[0008] The flame retardant properties of existing ultra-high molecular weight polyethylene materials are relatively poor, and there is an urgent need to increase the added value of ultra-high molecular weight polyethylene materials and develop an environmentally friendly, novel flame retardant ultra-high molecular weight polyethylene material to meet market demand. Summary of the invention

[0009] The purpose of the present invention is to solve the problems of high cost, ecological environment pollution, and complex manufacturing process in the current flame retardant system, to develop a more environmentally friendly and effective halogen-free green flame retardant, and to increase the added value of ultra-high molecular weight polyethylene materials; and to make full use of industrial waste and natural materials to reduce the production cost of flame retardants and the adverse effects on the environment and human health under the combustion environment.

[0010] To achieve the above-mentioned purpose, the present invention provides an ultra-high molecular weight polyethylene composition, which comprises the following components in parts by weight: 10-15 parts of industrial carbon black, 10-15 parts of modified montmorillonite, 5-10 parts of lignin, 8-12 parts of ammonium polyphosphate and / or melamine phosphate, 5-10 parts of nano aluminum hydroxide, 0.3-3 parts of coupling agent, 0.5-6 parts of flow modifier, 0.5-2 parts of light stabilizer, and 90-140 parts of ultra-high molecular weight polyethylene base material.

[0011] The ultra-high molecular weight polyethylene composition of the invention comprises: 11-14 parts of industrial carbon black, 11-14 parts of modified montmorillonite, 6-9 parts of lignin, 9-11 parts of ammonium polyphosphate and / or melamine phosphate, 6-9 parts of nano aluminum hydroxide, 0.5-2.8 parts of coupling agent, 0.7-4.5 parts of flow modifier, 0.7-1.5 parts of light stabilizer and 100-130 parts of ultra-high molecular weight polyethylene base material.

[0012] The ultra-high molecular weight polyethylene composition of the present invention, the modified montmorillonite is montmorillonite treated by plasma modification.

[0013] The ultra-high molecular weight polyethylene composition of the invention is prepared by the following steps: adding montmorillonite into a plasma reactor, inputting a treatment gas, and treating the montmorillonite by using electrons, free radicals, ions and molecules in an excited state in the plasma reactor to obtain the modified montmorillonite.

[0014] The ultra-high molecular weight polyethylene composition of the present invention, the processing gas includes but is not limited to at least one of oxygen, nitrogen, argon and methane.

[0015] The ultra-high molecular weight polyethylene composition of the present invention has a plasma reactor with a power of 30-100 watts, a treatment time of 10-50 minutes, and a treatment gas flow rate of 20-60 ml / min.

[0016] The ultra-high molecular weight polyethylene composition of the present invention, the montmorillonite is at least one of hydrogen-based montmorillonite, calcium-based montmorillonite, sodium-based montmorillonite and lithium-based montmorillonite.

[0017] After being modified by gas, the surface of montmorillonite is rich in active groups such as hydroxyl and carbonyl, which improves the surface performance and activity of montmorillonite, enables it to react better with other substances, promotes better combination of flame retardant and high molecular weight polyethylene base material, and achieves the purpose of improving flame retardant effect. Compared with other montmorillonite modification technologies, such as organic modification, acid modification, and ion exchange modification, the entire treatment process does not add chemicals, and there is no solvent residue afterwards. The overall process is simple and easy.

[0018] In the ultra-high molecular weight polyethylene composition of the present invention, the coupling agent includes but is not limited to one of silanes, titanates and aluminates.

[0019] The silane coupling agent is, for example but not limited to, at least one of vinyltrichlorosilane, vinyltrimethoxysilane, vinylmethyldichlorosilane, γ-chloropropyltrimethoxysilane, γ-chloropropyltriethoxysilane, γ-aminopropyltriethoxysilane, γ-(2,3-epoxypropoxy)propyltrimethoxysilane, γ-(methacryloyloxy)propyltrimethoxysilane, γ-mercaptopropyltriethoxysilane, γ-mercaptopropyltrimethoxysilane, N-(β-aminoethyl)-γ-aminopropylmethyldimethoxysilane, and γ-aminoethylaminopropyltrimethoxysilane.

[0020] The titanate coupling agent is, for example but not limited to, at least one of bis(dioctyl pyrophosphate)ethylene titanate, isopropyl tri(isostearoyl) titanate, isopropyl tri(dioctyl pyrophosphate) titanate, isopropyl di(methacryloyl) isostearyl titanate, and isopropyl tri(dodecylbenzenesulfonyl) titanate.

[0021] The aluminate coupling agent is, for example but not limited to, at least one of isopropyl distearate acyloxyaluminate, trimethyl aluminate, triethyl aluminate, and tribenzyl aluminate.

[0022] The ultra-high molecular weight polyethylene composition of the present invention, the flow modifier includes but is not limited to at least one of polyethylene wax, low-density polyethylene and modified polyethylene wax.

[0023] In the ultra-high molecular weight polyethylene composition of the present invention, the light stabilizer includes but is not limited to at least one of a benzotriazole light stabilizer, a benzophenone light stabilizer and a triazine light stabilizer.

[0024] The benzotriazole light stabilizer is, for example but not limited to, at least one of 2'-(2'-hydroxy-3'-tert-butyl-5'-methylphenyl)-5-chlorobenzotriazole, 2-(2'-hydroxy-5'-tert-octylphenyl)benzotriazole, and 2-(2'-hydroxy-3',5'-di-tert-amylphenylbenzotriazole.

[0025] The benzophenone light stabilizer is, for example but not limited to, 2-hydroxy-4-n-octyloxybenzophenone.

[0026] The triazine light stabilizer is, for example but not limited to, 2-(4,6-bis(2,4-dimethylphenyl)-1,3,5-triazine-2-yl)-5-octyloxyphenol.

[0027] The ultra-high molecular weight polyethylene composition of the present invention has no particular restrictions on the type or performance of the ultra-high molecular weight polyethylene base material, which can be selected according to conventional techniques in the art. The weight average molecular weight of the ultra-high molecular weight polyethylene base material can be, for example but not limited to, 800,000-6,000,000 mol / g.

[0028] The ultra-high molecular weight polyethylene composition of the present invention further comprises an antioxidant, and the antioxidant is added in an amount of 0.1-3 parts by weight, preferably 0.3-2 parts by weight.

[0029] The present invention does not particularly limit the type of antioxidant, and the antioxidant is, for example but not limited to, selected from antioxidant 1010, antioxidant 1076, antioxidant 168, antioxidant 626, and compound antioxidants thereof.

[0030] Preferably, the antioxidant is a composite antioxidant, the main antioxidant of the composite antioxidant is antioxidant 1010 or antioxidant 1076, and the auxiliary antioxidant is antioxidant 168 or antioxidant 626; wherein the mass ratio of the main antioxidant to the auxiliary antioxidant is 1:1-1:2, and the mass ratio is, for example but not limited to, 1:1, 1:1.5, 1:2.

[0031] The present invention also provides a method for preparing an ultra-high molecular weight polyethylene composition, the preparation method comprising the following steps:

[0032] Step 1: mixing industrial carbon black, modified montmorillonite, lignin, ammonium polyphosphate and / or melamine phosphate, nano aluminum hydroxide, and a coupling agent to obtain a composite flame retardant material matrix;

[0033] Step 2: adding the compounded flame retardant material matrix, the flow modifier, the light stabilizer, and the ultra-high molecular weight polyethylene base material into an extruder for mixing, and obtaining an ultra-high molecular weight polyethylene composite material after extrusion;

[0034] Step 3: treating the ultra-high molecular weight polyethylene composite material obtained in step 2 in a plasma reactor to obtain an ultra-high molecular weight polyethylene composition.

[0035] In the method for preparing the ultra-high molecular weight polyethylene composition of the present invention, in step 3, at least one of methane, ethane and butane is used to treat the ultra-high molecular weight polyethylene composite material.

[0036] At least one of methane, ethane and butane can improve the surface properties of the ultra-high molecular weight polyethylene composite material, thereby further improving the flame retardant effect of the ultra-high molecular weight polyethylene composite material.

[0037] In the method for preparing the ultra-high molecular weight polyethylene composition of the present invention, in step 3, the power of the plasma reactor is 30-70 watts, and the processing time is 25-40 minutes.

[0038] The preparation method of the ultra-high molecular weight polyethylene composition of the present invention can also be described in detail as follows:

[0039] Step 1, preparation of modified montmorillonite:

[0040] Using a plasma reactor, at a certain power and treatment time, oxygen, nitrogen, argon or methane is used as the treatment gas, and active particles such as electrons, free radicals, ions, and excited molecules in the plasma are used to treat the montmorillonite for a certain time to obtain modified montmorillonite. The power of the plasma reactor is generally 30-100 watts, the treatment time is 10-50 minutes, and the gas flow rate is 20-60 ml / minute.

[0041] Step 2: Compounding of modified montmorillonite and other flame retardants:

[0042] The modified montmorillonite (10-15 parts by mass) obtained in step 1 is mixed with industrial carbon black (10-15 parts by mass), ammonium polyphosphate (and / or melamine phosphate) (8-12 parts by mass), lignin (5-10 parts by mass), nano aluminum hydroxide (5-10 parts by mass), and a coupling agent (0.3-3 parts by mass) to obtain a composite flame retardant material matrix.

[0043] Step 3, blending of the compounded flame retardant material matrix and ultra-high molecular weight polyethylene:

[0044] The composite flame retardant material matrix obtained in step 2 is added into a twin-screw extruder at a certain temperature for mixing with a flow modifier (0.5-6 parts by weight), a light stabilizer (0.5-2 parts by weight), an ultra-high molecular weight polyethylene base material (90-140 parts by weight), and an antioxidant (0.1-3 parts by weight), and extruded to obtain an ultra-high molecular weight polyethylene composite material.

[0045] Step 4, treating the extruded ultra-high molecular weight polyethylene composite material with a plasma reactor:

[0046] The ultra-high molecular weight polyethylene composite material after extrusion is treated with gases such as ethane in a plasma reactor to improve its surface properties and further improve the flame retardant effect of the material.

[0047] The present invention makes extensive use of montmorillonite, which is rich in sources and cheap in price, has obvious environmental protection value, and can greatly reduce the production cost of flame-retardant ultra-high molecular weight polyethylene compositions. The montmorillonite can also be montmorillonite that has been discarded after industrial use and has been simply treated; the industrial carbon black can also be discarded industrial carbon black, but the organic impurities in the discarded industrial carbon black cannot be too much. The preparation method of the present invention makes better use of industrial waste and natural materials, effectively reduces the overall production cost of the flame retardant, and the preparation process is also simple and easy to implement. The raw materials do not contain halogens and are more green and environmentally friendly; it also reduces the adverse effects on the environment and human health under the combustion environment. The present invention modifies montmorillonite by plasma, and the surface of the modified montmorillonite has relatively abundant active groups such as hydroxyl and carbonyl, which is conducive to the subsequent formation of ultra-high molecular weight polyethylene compositions, improves the flame retardant properties of ultra-high molecular weight polyethylene compositions, and has the characteristics of being more environmentally friendly and efficient compared with other existing modification technologies such as organic modified montmorillonite and acid modified montmorillonite. The invention compounds industrial carbon black, modified montmorillonite, ammonium polyphosphate and / or melamine phosphate, and simultaneously adds nano aluminum hydroxide, coupling agent, flow modifier, light stabilizer, ultra-high molecular weight polyethylene base material and other components to modify and form an ultra-high molecular weight polyethylene composition. The components act synergistically, and the heat resistance, flame retardancy, smoke suppression and other properties of the obtained ultra-high molecular weight polyethylene composition are also improved, and the generation of molten droplets is effectively suppressed. DETAILED DESCRIPTION

[0048] The present invention is described in detail below by way of examples. It is necessary to point out that the following examples are only used to further illustrate the present invention and cannot be construed as limiting the scope of protection of the present invention. Those skilled in the art in this field can make some non-essential improvements and adjustments to the present invention based on the above content of the present invention. The raw materials used in the following examples and comparative examples, unless otherwise specified, are all commercially available.

[0049] Analytical methods

[0050] The limiting oxygen index (LOI) was tested using a LOI instrument (Model 5801, produced by Kunshan Yangyi Testing Instrument Co., Ltd.) using the standard GB / T 2406-2009.

[0051] Raw materials and sources

[0052] Calcium montmorillonite was purchased from Shijiazhuang Zhengyu New Material Technology Co., Ltd.; sodium montmorillonite was purchased from Lingshou County Jiheng Mineral Products Processing Plant; ammonium polyphosphate and melamine phosphate were purchased from Green Union (Jining) Chemical Technology Co., Ltd., with a purity greater than 98%; industrial carbon black was commercially available; lignin was purchased from Gongyi Shengshi Refractory Co., Ltd. ， 工业品; Nano aluminum hydroxide, purchased from Hangzhou Jikang New Materials Co., Ltd., purity 99.5%; titanate coupling agent, aluminate coupling agent, commercially available, industrial products; light stabilizer, commercially available, industrial products; antioxidants 1010, 1076, 168, 626, purchased from Sanfeng Chemical Co., Ltd., Linyi City, Shandong Province.

[0053] Example 1

[0054] (1) Preparation of modified montmorillonite:

[0055] A plasma reactor was used, oxygen was used as the processing gas; the reaction power was 50 watts, the processing time was 35 minutes, and the gas flow rate was 40 ml / minute to modify the calcium-based montmorillonite to obtain modified montmorillonite.

[0056] (2) Compounding of modified montmorillonite and other flame retardants:

[0057] 15 parts by mass of the modified montmorillonite obtained in step (1) are mixed with 10 parts by mass of industrial carbon black, 10 parts by mass of ammonium polyphosphate, 10 parts by mass of lignin, 8 parts by mass of nano-aluminum hydroxide, and 0.5 parts by mass of a titanate coupling agent, bis(dioctyloxypyrophosphate)ethylene titanate, to obtain a composite flame retardant material matrix.

[0058] (3) Blending of compounded flame retardant material matrix and ultra-high molecular weight polyethylene base material:

[0059] The composite flame retardant material matrix obtained in step (2) is added into a twin-screw extruder at 210° C. for granulation, and an ultra-high molecular weight polyethylene composite material is obtained after extrusion, wherein 2.5 parts by mass of a flow modifier polyethylene wax, 1.5 parts by mass of a benzotriazole light stabilizer 2'-(2'-hydroxy-3'-tert-butyl-5'-methylphenyl)-5-chlorobenzotriazole, 120 parts by mass of an ultra-high molecular weight polyethylene base material, and 0.3 parts by mass of a composite antioxidant formed by an antioxidant 1010 and an antioxidant 168 in a mass ratio of 1:2 are added into a twin-screw extruder for granulation, and an ultra-high molecular weight polyethylene composite material is obtained after extrusion.

[0060] (4) Using a plasma reactor to treat the extruded ultra-high molecular weight polyethylene composite material:

[0061] The ultra-high molecular weight polyethylene composite material obtained in step (3) is treated with ethane gas in a plasma reactor with a reaction power of 50 watts and a treatment time of 25 minutes to obtain an ultra-high molecular weight polyethylene composition.

[0062] The limiting oxygen index (LOI) of the obtained ultra high molecular weight polyethylene composition was 29.

[0063] Example 2

[0064] (1) Preparation of modified montmorillonite:

[0065] A plasma reactor was used, nitrogen was used as the processing gas; the reaction power was 50 watts, the processing time was 40 minutes, and the gas flow rate was 50 ml / minute to modify the calcium-based montmorillonite to obtain modified montmorillonite.

[0066] (2) Compounding of modified montmorillonite and other flame retardants:

[0067] 12 parts by mass of the modified montmorillonite obtained in step (1) are mixed with 10 parts by mass of industrial carbon black, 10 parts by mass of ammonium polyphosphate, 8 parts by mass of lignin, 9 parts by mass of nano-aluminum hydroxide, and 0.8 parts by mass of a titanate coupling agent, bis(dioctyloxypyrophosphate)ethylene titanate, to obtain a composite flame retardant material matrix.

[0068] (3) Blending of compounded flame retardant material matrix and ultra-high molecular weight polyethylene base material:

[0069] The composite flame retardant material matrix obtained in step (2) is added into a twin-screw extruder at 220° C. for granulation, and an ultra-high molecular weight polyethylene composite material is obtained after extrusion, by mixing 140 parts by mass of an ultra-high molecular weight polyethylene base material, 2 parts by mass of a flow modifier polyethylene wax, 1.5 parts by mass of a benzotriazole light stabilizer 2-(2'-hydroxy-5'-tert-octylphenyl)benzotriazole, and 0.3 parts by mass of a composite antioxidant formed by an antioxidant 1076 and an antioxidant 168 in a mass ratio of 1:2.

[0070] (4) Using a plasma reactor to treat the extruded ultra-high molecular weight polyethylene composite material:

[0071] The ultra-high molecular weight polyethylene composite material obtained in step (3) is treated with butane gas in a plasma reactor with a reaction power of 50 watts and a treatment time of 25 minutes to obtain an ultra-high molecular weight polyethylene composition.

[0072] The limiting oxygen index (LOI) of the obtained ultra high molecular weight polyethylene composition was 29.

[0073] Example 3

[0074] (1) Preparation of modified montmorillonite:

[0075] A plasma reactor was used, methane gas was used as the processing gas; the reaction power was 40 watts, the processing time was 40 minutes, and the gas flow rate was 35 ml / minute to modify the sodium-based montmorillonite to obtain modified montmorillonite.

[0076] (2) Compounding of modified montmorillonite and other flame retardants:

[0077] 14 parts by mass of the modified montmorillonite obtained in step (1) are mixed with 10 parts by mass of industrial carbon black, 11 parts by mass of ammonium polyphosphate and melamine phosphate in total, 10 parts by mass of lignin, 9 parts by mass of nano-aluminum hydroxide, and 0.8 parts by mass of coupling agent isopropyl tri(dodecylbenzenesulfonyl) titanate to obtain a composite flame retardant material matrix.

[0078] (3) Blending of compounded flame retardant material matrix and ultra-high molecular weight polyethylene base material:

[0079] The flame retardant material matrix obtained in step (2) is compounded with 2.5 parts by mass of polyethylene wax as a flow modifier, 2 parts by mass of 2-(2'-hydroxy-3',5'-di-tert-amylphenylbenzotriazole as a light stabilizer, 120 parts by mass of an ultra-high molecular weight polyethylene base material, and 0.3 parts by mass of a composite antioxidant formed by antioxidant 1076 and antioxidant 626 in a mass ratio of 1:1.5, and is added into a twin-screw extruder at 225° C. for granulation to obtain an ultra-high molecular weight polyethylene composite material after extrusion.

[0080] (4) Using a plasma reactor to treat the extruded ultra-high molecular weight polyethylene composite material:

[0081] The ultra-high molecular weight polyethylene composite material obtained in step (3) is treated with butane gas in a plasma reactor with a reaction power of 50 watts and a treatment time of 25 minutes to obtain an ultra-high molecular weight polyethylene composition.

[0082] The limiting oxygen index (LOI) of the obtained ultra high molecular weight polyethylene composition was 27.

[0083] Example 4

[0084] (1) Preparation of modified montmorillonite:

[0085] A plasma reactor was used, nitrogen was used as the processing gas; the reaction power was 45 watts, the processing time was 35 minutes, and the gas flow rate was 40 ml / minute to modify the lithium-based montmorillonite to obtain modified montmorillonite.

[0086] (2) Compounding of modified montmorillonite and other flame retardants:

[0087] 13 parts by mass of the modified montmorillonite obtained in step (1) are mixed with 12 parts by mass of industrial carbon black, 11 parts by mass of melamine phosphate, 5 parts by mass of lignin, 10 parts by mass of nano-aluminum hydroxide, and 0.5 parts by mass of coupling agent γ-aminopropyltriethoxysilane to obtain a composite flame retardant material matrix.

[0088] (3) Blending of compounded flame retardant material matrix and ultra-high molecular weight polyethylene base material:

[0089] The composite flame retardant material matrix obtained in step (2) is added into a twin-screw extruder at 220° C. for granulation, and an ultra-high molecular weight polyethylene composite material is obtained after extrusion, wherein 2.5 parts by mass of low-density polyethylene as a flow modifier, 1.5 parts by mass of benzophenone-type light stabilizer 2-hydroxy-4-n-octyloxybenzophenone, 130 parts by mass of ultra-high molecular weight polyethylene base material, and 0.3 parts by mass of a composite antioxidant formed by antioxidant 1010 and antioxidant 168 in a mass ratio of 1:1.5 are added.

[0090] (4) Using a plasma reactor to treat the extruded ultra-high molecular weight polyethylene composite material:

[0091] The ultra-high molecular weight polyethylene composite material obtained in step (3) is treated with ethane gas in a plasma reactor with a reaction power of 50 watts and a treatment time of 30 minutes to obtain an ultra-high molecular weight polyethylene composition.

[0092] The limiting oxygen index (LOI) of the obtained ultra high molecular weight polyethylene composition was 28.

[0093] Example 5

[0094] (1) Preparation of modified montmorillonite:

[0095] A plasma reactor was used, argon gas was used as the processing gas; the reaction power was 40 watts, the processing time was 35 minutes, and the gas flow rate was 45 ml / minute to modify the hydrogen-based montmorillonite to obtain modified montmorillonite.

[0096] (2) Compounding of modified montmorillonite and other flame retardants:

[0097] 15 parts by mass of the modified montmorillonite obtained in step (1) are mixed with 13 parts by mass of industrial carbon black, 9 parts by mass of melamine phosphate, 8 parts by mass of lignin, 8 parts by mass of nano-aluminum hydroxide, and 0.7 parts by mass of coupling agent trimethyl aluminate to obtain a composite flame retardant material matrix.

[0098] (3) Blending of compounded flame retardant material matrix and ultra-high molecular weight polyethylene base material:

[0099] The composite flame retardant material matrix obtained in step (2) is added into a twin-screw extruder at 230° C. for granulation, and an ultra-high molecular weight polyethylene composite material is obtained after extrusion. The composite flame retardant material matrix obtained in step (2) is mixed with 3 parts by mass of low-density polyethylene as a flow modifier, 1 part by mass of benzophenone-type light stabilizer 2-hydroxy-4-n-octyloxybenzophenone, 1 part by mass of 2-(2'-hydroxy-5'-tert-octylphenyl)benzotriazole, 100 parts by mass of ultra-high molecular weight polyethylene base material, and 0.3 parts by mass of a composite antioxidant formed by antioxidant 1076 and antioxidant 626 in a mass ratio of 1:1.

[0100] (4) Using a plasma reactor to treat the extruded ultra-high molecular weight polyethylene composite material:

[0101] The ultra-high molecular weight polyethylene composite material obtained in step (3) is treated with methane gas in a plasma reactor at a reaction power of 40 watts and a treatment time of 35 minutes to obtain an ultra-high molecular weight polyethylene composition.

[0102] The limiting oxygen index (LOI) of the obtained ultra high molecular weight polyethylene composition was 29.

[0103] Example 6

[0104] (1) Preparation of modified montmorillonite:

[0105] A plasma reactor was used, nitrogen was used as the processing gas; the reaction power was 50 watts, the processing time was 40 minutes, and the gas flow rate was 35 ml / minute to modify the calcium-based montmorillonite to obtain modified montmorillonite.

[0106] (2) Compounding of modified montmorillonite and other flame retardants:

[0107] 14 parts by mass of the modified montmorillonite obtained in step (1) are mixed with 13 parts by mass of industrial carbon black, 12 parts by mass of melamine phosphate, 5 parts by mass of lignin, 7 parts by mass of nano-aluminum hydroxide, and 0.5 parts by mass of coupling agent isopropyl distearate acyloxyaluminate to obtain a composite flame retardant material matrix.

[0108] (3) Blending of compounded flame retardant material matrix and ultra-high molecular weight polyethylene base material:

[0109] The composite flame retardant material matrix obtained in step (2) is added into a twin-screw extruder at 215° C. for granulation, and an ultra-high molecular weight polyethylene composite material is obtained after extrusion, wherein 2.5 parts by mass of a flow modifier modified polyethylene wax, 1.5 parts by mass of a triazine light stabilizer 2-(4,6-bis(2,4-dimethylphenyl)-1,3,5-triazine-2-yl)-5-octoxyphenol, 130 parts by mass of an ultra-high molecular weight polyethylene base material, and 0.3 parts by mass of a composite antioxidant formed by an antioxidant 1010 and an antioxidant 626 in a mass ratio of 1:2 are added into a twin-screw extruder for granulation at 215° C.

[0110] (4) Using a plasma reactor to treat the extruded ultra-high molecular weight polyethylene composite material:

[0111] The ultra-high molecular weight polyethylene composite material obtained in step (3) is treated with methane gas in a plasma reactor with a reaction power of 30 watts and a treatment time of 40 minutes to obtain an ultra-high molecular weight polyethylene composition.

[0112] The limiting oxygen index (LOI) of the obtained ultra high molecular weight polyethylene composition was 28.

[0113] Example 7

[0114] (1) Preparation of modified montmorillonite:

[0115] A plasma reactor was used, oxygen was used as the processing gas; the reaction power was 50 watts, the processing time was 35 minutes, and the gas flow rate was 45 ml / minute to modify the calcium-based montmorillonite to obtain modified montmorillonite.

[0116] (2) Compounding of modified montmorillonite and other flame retardants:

[0117] 15 parts by mass of the modified montmorillonite obtained in step (1) are mixed with 12 parts by mass of industrial carbon black, 10 parts by mass of melamine phosphate, 7 parts by mass of lignin, 9 parts by mass of nano-aluminum hydroxide, and 0.5 parts by mass of a titanate coupling agent, bis(dioctyloxypyrophosphate)ethylene titanate, to obtain a composite flame retardant material matrix.

[0118] (3) Blending of compounded flame retardant material matrix and ultra-high molecular weight polyethylene base material:

[0119] The composite flame retardant material matrix obtained in step (2) is added into a twin-screw extruder at 225° C. for granulation, and an ultra-high molecular weight polyethylene composite material is obtained after extrusion, by adding 3 parts by mass of flow modifier modified polyethylene wax, 1 part by mass of benzotriazole light stabilizer 2-(2'-hydroxy-5'-tert-octylphenyl)benzotriazole, 90 parts by mass of ultra-high molecular weight polyethylene base material, and 0.3 parts by mass of a composite antioxidant formed by antioxidant 1076 and antioxidant 168 in a mass ratio of 1:2.

[0120] (4) Using a plasma reactor to treat the extruded ultra-high molecular weight polyethylene composite material:

[0121] The ultra-high molecular weight polyethylene composite material obtained in step (3) is treated with ethane gas in a plasma reactor at a reaction power of 30 watts and a treatment time of 30 minutes to obtain an ultra-high molecular weight polyethylene composition.

[0122] The limiting oxygen index (LOI) of the obtained ultra high molecular weight polyethylene composition was 29.

[0123] Example 8

[0124] (1) Preparation of modified montmorillonite:

[0125] A plasma reactor was used, oxygen was used as the processing gas; the reaction power was 50 watts, the processing time was 35 minutes, and the gas flow rate was 40 ml / minute to modify the calcium-based montmorillonite to obtain modified montmorillonite.

[0126] (2) Compounding of modified montmorillonite and other flame retardants:

[0127] 10 parts by mass of the modified montmorillonite obtained in step (1) are mixed with 15 parts by mass of industrial carbon black, 5 parts by mass of ammonium polyphosphate, 5 parts by mass of melamine phosphate, 10 parts by mass of lignin, 5 parts by mass of nano-aluminum hydroxide, and 0.5 parts by mass of coupling agent tribenzyl aluminate to obtain a composite flame retardant material matrix.

[0128] (3) Blending of compounded flame retardant material matrix and ultra-high molecular weight polyethylene base material:

[0129] The composite flame retardant material matrix obtained in step (2) is added into a twin-screw extruder at 210° C. to granulate, and after extrusion, an ultra-high molecular weight polyethylene composite material is obtained. The composite flame retardant material matrix is ​​mixed with 0.5 parts by mass of a flow modifier polyethylene wax, 0.5 parts by mass of a benzotriazole light stabilizer 2-(2'-hydroxy-3',5'-di-tert-amylphenyl)benzotriazole, 120 parts by mass of an ultra-high molecular weight polyethylene base material, and 0.3 parts by mass of an antioxidant 626.

[0130] (4) Using a plasma reactor to treat the extruded ultra-high molecular weight polyethylene composite material:

[0131] The ultra-high molecular weight polyethylene composite material obtained in step (3) is treated with ethane gas in a plasma reactor with a reaction power of 50 watts and a treatment time of 25 minutes to obtain an ultra-high molecular weight polyethylene composition.

[0132] The limiting oxygen index (LOI) of the obtained ultra high molecular weight polyethylene composition was 26.

[0133] Example 9

[0134] (1) Preparation of modified montmorillonite:

[0135] A plasma reactor was used, oxygen was used as the processing gas; the reaction power was 50 watts, the processing time was 35 minutes, and the gas flow rate was 40 ml / minute to modify the calcium-based montmorillonite to obtain modified montmorillonite.

[0136] (2) Compounding of modified montmorillonite and other flame retardants:

[0137] 10 parts by mass of the modified montmorillonite obtained in step (1) are mixed with 15 parts by mass of industrial carbon black, 5 parts by mass of ammonium polyphosphate, 5 parts by mass of melamine phosphate, 10 parts by mass of lignin, 5 parts by mass of nano-aluminum hydroxide, and 0.5 parts by mass of coupling agent tribenzyl aluminate to obtain a composite flame retardant material matrix.

[0138] (3) Blending of compounded flame retardant material matrix and ultra-high molecular weight polyethylene base material:

[0139] The composite flame retardant material matrix obtained in step (2) is added into a twin-screw extruder at 210° C. for granulation, and an ultra-high molecular weight polyethylene composite material is obtained after extrusion, along with 0.5 parts by mass of a flow modifier polyethylene wax, 0.5 parts by mass of a benzotriazole light stabilizer 2-(2'-hydroxy-3',5'-di-tert-amylphenyl)benzotriazole, and 120 parts by mass of an ultra-high molecular weight polyethylene base material.

[0140] (4) Using a plasma reactor to treat the extruded ultra-high molecular weight polyethylene composite material:

[0141] The ultra-high molecular weight polyethylene composite material obtained in step (3) is treated with ethane gas in a plasma reactor with a reaction power of 50 watts and a treatment time of 25 minutes to obtain an ultra-high molecular weight polyethylene composition.

[0142] The limiting oxygen index (LOI) of the obtained ultra high molecular weight polyethylene composition was 25.

[0143] Comparative Example 1

[0144] The difference from Example 7 is that no industrial carbon black is added.

[0145] (1) Preparation of modified montmorillonite:

[0146] A plasma reactor was used, oxygen was used as the processing gas; the reaction power was 50 watts, the processing time was 35 minutes, and the gas flow rate was 45 ml / minute to modify the calcium-based montmorillonite to obtain modified montmorillonite.

[0147] (2) Compounding of modified montmorillonite and other flame retardants:

[0148] 15 parts by mass of the modified montmorillonite obtained in step (1), 10 parts by mass of melamine phosphate, 7 parts by mass of lignin, 9 parts by mass of nano-aluminum hydroxide, and 0.5 parts by mass of a titanate coupling agent, bis(dioctyloxypyrophosphate)ethylene titanate, are mixed to obtain a composite flame retardant material matrix.

[0149] (3) Blending of compounded flame retardant material matrix and ultra-high molecular weight polyethylene base material:

[0150] The composite flame retardant material matrix obtained in step (2) is added into a twin-screw extruder at 225° C. for granulation, and an ultra-high molecular weight polyethylene composite material is obtained after extrusion, by adding 3 parts by mass of flow modifier modified polyethylene wax, 1 part by mass of benzotriazole light stabilizer 2-(2'-hydroxy-5'-tert-octylphenyl)benzotriazole, 90 parts by mass of ultra-high molecular weight polyethylene base material, and 0.3 parts by mass of a composite antioxidant formed by antioxidant 1076 and antioxidant 168 in a mass ratio of 1:2.

[0151] (4) Using a plasma reactor to treat the extruded ultra-high molecular weight polyethylene composite material:

[0152] The ultra-high molecular weight polyethylene composite material obtained in step (3) is treated with ethane gas in a plasma reactor at a reaction power of 30 watts and a treatment time of 30 minutes to obtain an ultra-high molecular weight polyethylene composition.

[0153] The limiting oxygen index (LOI) of the obtained ultra high molecular weight polyethylene composition was 23.

[0154] Comparative Example 2

[0155] The difference from Example 7 is that no industrial carbon black and melamine phosphate are added.

[0156] (1) Preparation of modified montmorillonite:

[0157] A plasma reactor was used, oxygen was used as the processing gas; the reaction power was 50 watts, the processing time was 35 minutes, and the gas flow rate was 45 ml / minute to modify the calcium-based montmorillonite to obtain modified montmorillonite.

[0158] (2) Compounding of modified montmorillonite and other flame retardants:

[0159] 15 parts by mass of the modified montmorillonite obtained in step (1), 7 parts by mass of lignin, 9 parts by mass of nano-aluminum hydroxide, and 0.5 parts by mass of a titanate coupling agent, bis(dioctyloxypyrophosphate)ethylene titanate, are mixed to obtain a composite flame retardant material matrix.

[0160] (3) Blending of compounded flame retardant material matrix and ultra-high molecular weight polyethylene base material:

[0161] The composite flame retardant material matrix obtained in step (2) is added into a twin-screw extruder at 225° C. for granulation, and an ultra-high molecular weight polyethylene composite material is obtained after extrusion, by adding 3 parts by mass of flow modifier modified polyethylene wax, 1 part by mass of benzotriazole light stabilizer 2-(2'-hydroxy-5'-tert-octylphenyl)benzotriazole, 90 parts by mass of ultra-high molecular weight polyethylene base material, and 0.3 parts by mass of a composite antioxidant formed by antioxidant 1076 and antioxidant 168 in a mass ratio of 1:2.

[0162] (4) Using a plasma reactor to treat the extruded ultra-high molecular weight polyethylene composite material:

[0163] The ultra-high molecular weight polyethylene composite material obtained in step (3) is treated with ethane gas in a plasma reactor at a reaction power of 30 watts and a treatment time of 30 minutes to obtain an ultra-high molecular weight polyethylene composition.

[0164] The limiting oxygen index (LOI) of the obtained ultra high molecular weight polyethylene composition was 22.

[0165] Comparative Example 3

[0166] The difference from Example 7 is that the added amount of lignin is increased from 7 parts by mass to 15 parts by mass.

[0167] (1) Preparation of modified montmorillonite:

[0168] A plasma reactor was used, oxygen was used as the processing gas; the reaction power was 50 watts, the processing time was 35 minutes, and the gas flow rate was 45 ml / minute to modify the calcium-based montmorillonite to obtain modified montmorillonite.

[0169] (2) Compounding of modified montmorillonite and other flame retardants:

[0170] 15 parts by mass of the modified montmorillonite obtained in step (1) are mixed with 12 parts by mass of industrial carbon black, 10 parts by mass of melamine phosphate, 15 parts by mass of lignin, 9 parts by mass of nano-aluminum hydroxide, and 0.5 parts by mass of titanate coupling agent bis(dioctyloxypyrophosphate)ethylene titanate to obtain a composite flame retardant material matrix.

[0171] (3) Blending of compounded flame retardant material matrix and ultra-high molecular weight polyethylene base material:

[0172] The composite flame retardant material matrix obtained in step (2) is added into a twin-screw extruder at 225° C. for granulation, and an ultra-high molecular weight polyethylene composite material is obtained after extrusion, by adding 3 parts by mass of flow modifier modified polyethylene wax, 1 part by mass of benzotriazole light stabilizer 2-(2'-hydroxy-5'-tert-octylphenyl)benzotriazole, 90 parts by mass of ultra-high molecular weight polyethylene base material, and 0.3 parts by mass of a composite antioxidant formed by antioxidant 1076 and antioxidant 168 in a mass ratio of 1:2.

[0173] (4) Using a plasma reactor to treat the extruded ultra-high molecular weight polyethylene composite material:

[0174] The ultra-high molecular weight polyethylene composite material obtained in step (3) is treated with ethane gas in a plasma reactor at a reaction power of 30 watts and a treatment time of 30 minutes to obtain an ultra-high molecular weight polyethylene composition.

[0175] The limiting oxygen index (LOI) of the obtained ultra high molecular weight polyethylene composition was 24.

[0176] Comparative Example 4

[0177] The difference from Example 7 is that the added amount of melamine phosphate is increased from 10 parts by mass to 15 parts by mass.

[0178] (1) Preparation of modified montmorillonite:

[0179] A plasma reactor was used, oxygen was used as the processing gas; the reaction power was 50 watts, the processing time was 35 minutes, and the gas flow rate was 45 ml / minute to modify the calcium-based montmorillonite to obtain modified montmorillonite.

[0180] (2) Compounding of modified montmorillonite and other flame retardants:

[0181] 15 parts by mass of the modified montmorillonite obtained in step (1) are mixed with 12 parts by mass of industrial carbon black, 15 parts by mass of melamine phosphate, 7 parts by mass of lignin, 9 parts by mass of nano-aluminum hydroxide, and 0.5 parts by mass of titanate coupling agent bis(dioctyloxypyrophosphate)ethylene titanate to obtain a composite flame retardant material matrix.

[0182] (3) Blending of compounded flame retardant material matrix and ultra-high molecular weight polyethylene base material:

[0183] The composite flame retardant material matrix obtained in step (2) is added into a twin-screw extruder at 225° C. for granulation, and an ultra-high molecular weight polyethylene composite material is obtained after extrusion, by adding 3 parts by mass of flow modifier modified polyethylene wax, 1 part by mass of benzotriazole light stabilizer 2-(2'-hydroxy-5'-tert-octylphenyl)benzotriazole, 90 parts by mass of ultra-high molecular weight polyethylene base material, and 0.3 parts by mass of a composite antioxidant formed by antioxidant 1076 and antioxidant 168 in a mass ratio of 1:2.

[0184] (4) Using a plasma reactor to treat the extruded ultra-high molecular weight polyethylene composite material:

[0185] The ultra-high molecular weight polyethylene composite material obtained in step (3) is treated with ethane gas in a plasma reactor at a reaction power of 30 watts and a treatment time of 30 minutes to obtain an ultra-high molecular weight polyethylene composition.

[0186] The limiting oxygen index (LOI) of the obtained ultra high molecular weight polyethylene composition was 25.

[0187] Comparative Example 5

[0188] The difference from Example 7 is that the modified montmorillonite is replaced by montmorillonite, and the montmorillonite is not subjected to a modification process.

[0189] (1) Compounding of montmorillonite and other flame retardants:

[0190] 15 parts by mass of montmorillonite are mixed with 12 parts by mass of industrial carbon black, 10 parts by mass of melamine phosphate, 7 parts by mass of lignin, 9 parts by mass of nano-aluminum hydroxide, and 0.5 parts by mass of titanate coupling agent bis(dioctyloxypyrophosphate)ethylene titanate to obtain a composite flame retardant material matrix.

[0191] (2) Blending of compounded flame retardant material matrix and ultra-high molecular weight polyethylene base material:

[0192] The composite flame retardant material matrix obtained in step (1) is added into a twin-screw extruder at 225° C. for granulation, and an ultra-high molecular weight polyethylene composite material is obtained after extrusion, by adding 3 parts by mass of flow modifier modified polyethylene wax, 1 part by mass of benzotriazole light stabilizer 2-(2'-hydroxy-5'-tert-octylphenyl)benzotriazole, 90 parts by mass of ultra-high molecular weight polyethylene base material, and 0.3 parts by mass of a composite antioxidant formed by antioxidant 1076 and antioxidant 168 in a mass ratio of 1:2.

[0193] (3) Using plasma reactor to treat ultra-high molecular weight polyethylene composite materials after extrusion:

[0194] The ultra-high molecular weight polyethylene composite material obtained in step (2) is treated with ethane gas in a plasma reactor at a reaction power of 30 watts and a treatment time of 30 minutes to obtain an ultra-high molecular weight polyethylene composition.

[0195] The limiting oxygen index (LOI) of the obtained ultra high molecular weight polyethylene composition was 22.

[0196] Comparative Example 6

[0197] The difference from Example 7 is that cetyltrimethylammonium bromide is used to modify the montmorillonite.

[0198] (1) Preparation of modified montmorillonite:

[0199] 5 g of calcium-based montmorillonite was ultrasonically dispersed in 300 mL of deionized water, 3.42 g of hexadecyltrimethylammonium bromide was added, and the mixture was stirred in a 60° C. water bath for 4 h. After filtering, washing, and drying, hexadecyltrimethylammonium bromide-modified montmorillonite was obtained.

[0200] (2) Compounding of modified montmorillonite and other flame retardants:

[0201] 15 parts by mass of the montmorillonite modified with hexadecyltrimethylammonium bromide obtained in step (1) are mixed with 12 parts by mass of industrial carbon black, 10 parts by mass of melamine phosphate, 7 parts by mass of lignin, 9 parts by mass of nano-aluminum hydroxide, and 0.5 parts by mass of a titanate coupling agent, bis(dioctylpyrophosphate)ethylene titanate, to obtain a composite flame retardant material matrix.

[0202] (3) Blending of compounded flame retardant material matrix and ultra-high molecular weight polyethylene base material:

[0203] The composite flame retardant material matrix obtained in step (2) is added into a twin-screw extruder at 225° C. for granulation, and an ultra-high molecular weight polyethylene composite material is obtained after extrusion, by adding 3 parts by mass of flow modifier modified polyethylene wax, 1 part by mass of benzotriazole light stabilizer 2-(2'-hydroxy-5'-tert-octylphenyl)benzotriazole, 90 parts by mass of ultra-high molecular weight polyethylene base material, and 0.3 parts by mass of a composite antioxidant formed by antioxidant 1076 and antioxidant 168 in a mass ratio of 1:2.

[0204] (4) Using a plasma reactor to treat the extruded ultra-high molecular weight polyethylene composite material:

[0205] The ultra-high molecular weight polyethylene composite material obtained in step (3) is treated with ethane gas in a plasma reactor at a reaction power of 30 watts and a treatment time of 30 minutes to obtain an ultra-high molecular weight polyethylene composition.

[0206] The limiting oxygen index (LOI) of the obtained ultra high molecular weight polyethylene composition was 24.

[0207] It can be seen from the results of the embodiments and comparative examples that the present invention compounds industrial carbon black, modified montmorillonite, lignin, ammonium polyphosphate and / or melamine phosphate, nano aluminum hydroxide, coupling agent, flow modifier, light stabilizer, and ultra-high molecular weight polyethylene base material, and the components act synergistically to obtain an ultra-high molecular weight polyethylene composition with better flame retardant properties. In addition, it can be seen from the results of Example 7 and Comparative Examples 1-2 that the flame retardant properties of the ultra-high molecular weight polyethylene composition will be reduced if industrial carbon black is not added, or if industrial carbon black and melamine phosphate are not added, which can confirm that the components of the present invention play a synergistic role; it can be seen from the results of Example 7 and Comparative Examples 3-4 that the amount of each component added will affect the flame retardant properties of the ultra-high molecular weight polyethylene composition, and the ultra-high molecular weight polyethylene composition obtained within the addition amount range of the present invention has better flame retardant properties; it can be seen from the results of Example 7 and Comparative Example 5 that if montmorillonite is used directly without modification, the flame retardant properties of the ultra-high molecular weight polyethylene composition will be greatly reduced; it can be seen from the results of Example 7 and Comparative Example 6 that the flame retardant properties of the ultra-high molecular weight polyethylene composition obtained by modifying montmorillonite with plasma are better than those by modifying montmorillonite with hexadecyltrimethylammonium bromide. This is because the surface of the modified montmorillonite is rich in active groups such as hydroxyl and carbonyl groups through plasma modification, which is conducive to the subsequent formation of the ultra-high molecular weight polyethylene composition and improves the flame retardant properties of the ultra-high molecular weight polyethylene composition.

[0208] Of course, the present invention may have many other embodiments. Without departing from the spirit and essence of the present invention, technicians familiar with the field may make various corresponding changes and deformations based on the present invention, but these corresponding changes and deformations should all fall within the scope of protection of the claims of the present invention.

Claims

1. An ultra-high molecular weight polyethylene composition, characterized in that The invention comprises the following components in parts by weight: 10-15 parts of industrial carbon black, 10-15 parts of modified montmorillonite, 5-10 parts of lignin, 8-12 parts of ammonium polyphosphate and / or melamine phosphate, 5-10 parts of nano aluminum hydroxide, 0.3-3 parts of coupling agent, 0.5-6 parts of flow modifier, 0.5-2 parts of light stabilizer and 90-140 parts of ultra-high molecular weight polyethylene base material.

2. The ultra-high molecular weight polyethylene composition according to claim 1, characterized in that The ultra-high molecular weight polyethylene composition comprises: 11-14 parts of industrial carbon black, 11-14 parts of modified montmorillonite, 6-9 parts of lignin, 9-11 parts of ammonium polyphosphate and / or melamine phosphate, 6-9 parts of nano aluminum hydroxide, 0.3-2.8 parts of coupling agent, 0.7-4.5 parts of flow modifier, 0.7-1.5 parts of light stabilizer, and 100-130 parts of ultra-high molecular weight polyethylene base material.

3. The ultra-high molecular weight polyethylene composition according to claim 1, characterized in that The modified montmorillonite is montmorillonite that has been treated with plasma modification.

4. The ultra-high molecular weight polyethylene composition according to claim 3, characterized in that The modified montmorillonite is prepared by the following steps: adding montmorillonite into a plasma reactor, inputting a treatment gas, and treating the montmorillonite by utilizing electrons, free radicals, ions, and molecules in an excited state in the plasma reactor to obtain the modified montmorillonite.

5. The ultra-high molecular weight polyethylene composition according to claim 4, characterized in that The processing gas is at least one of oxygen, nitrogen, argon and methane.

6. The ultra-high molecular weight polyethylene composition according to claim 4, characterized in that: The power of the plasma reactor is 30-100 watts, the processing time is 10-50 minutes, and the flow rate of the processing gas is 20-60 ml / minute.

7. The ultra-high molecular weight polyethylene composition according to claim 4, characterized in that The montmorillonite is at least one of hydrogen-based montmorillonite, calcium-based montmorillonite, sodium-based montmorillonite and lithium-based montmorillonite.

8. The ultra-high molecular weight polyethylene composition according to claim 1, characterized in that The coupling agent is one of silane, titanate and aluminate.

9. The ultra-high molecular weight polyethylene composition according to claim 1, characterized in that: The flow improver is at least one of polyethylene wax, low-density polyethylene, and modified polyethylene wax.

10. The ultra-high molecular weight polyethylene composition according to claim 1, characterized in that The light stabilizer is at least one of a benzotriazole light stabilizer, a benzophenone light stabilizer, and a triazine light stabilizer.

11. The ultra-high molecular weight polyethylene composition according to claim 1, characterized in that: The invention also comprises an antioxidant, wherein the antioxidant is added in an amount of 0.1 to 3 parts by weight.

12. The ultra-high molecular weight polyethylene composition according to claim 11, characterized in that The antioxidant is selected from antioxidant 1010, antioxidant 1076, antioxidant 168, antioxidant 626 and compound antioxidants thereof.

13. The ultra-high molecular weight polyethylene composition according to claim 12, characterized in that The antioxidant is a composite antioxidant, wherein the main antioxidant of the composite antioxidant is antioxidant 1010 or antioxidant 1076, and the auxiliary antioxidant is antioxidant 168 or antioxidant 626; wherein the mass ratio of the main antioxidant to the auxiliary antioxidant is 1:1-1:

2.

14. A method for preparing the ultra-high molecular weight polyethylene composition according to any one of claims 1 to 13, characterized in that: The following steps are involved: Step 1: mixing industrial carbon black, modified montmorillonite, lignin, ammonium polyphosphate and / or melamine phosphate, nano aluminum hydroxide, and a coupling agent to obtain a composite flame retardant material matrix; Step 2: adding the compounded flame retardant material matrix, the flow modifier, the light stabilizer, and the ultra-high molecular weight polyethylene base material into an extruder for mixing, and obtaining an ultra-high molecular weight polyethylene composite material after extrusion; Step 3: treating the ultra-high molecular weight polyethylene composite material obtained in step 2 in a plasma reactor to obtain an ultra-high molecular weight polyethylene composition.

15. The method for preparing the ultra-high molecular weight polyethylene composition according to claim 14, characterized in that: In step 3, the ultra-high molecular weight polyethylene composite material is treated with at least one of methane, ethane and butane.

16. The method for preparing an ultra-high molecular weight polyethylene composition according to claim 14, characterized in that: In step 3, the power of the plasma reactor is 30-70 watts, and the processing time is 25-40 minutes.