A reinforced modified ultra-high molecular weight PE water supply pipe and its production process

Abstract

The invention relates to the field of material technology, and discloses a reinforced modified ultra-high molecular weight PE water supply pipe and a production process thereof. The PE water supply pipe is made of ultra-high molecular weight polyethylene as a substrate, and is prepared by mixing with a compatibilizer, a polymeric macromolecular antioxidant, a rubber modifier and other auxiliary agents, melt extruding and shaping. The polymeric macromolecular antioxidant contains a large number of hindered phenol antioxidant groups in its structure, so a small amount of addition can greatly improve the antioxidant performance of ultra-high molecular weight polyethylene. The aluminum silicate fiber modification can be evenly dispersed in the ultra-high molecular weight polyethylene matrix, effectively exerting its own advantages as an inorganic material, and when the material is subjected to external stress, it produces good stress dispersion and load transfer effects, thereby effectively enhancing the mechanical strength of the ultra-high molecular weight polyethylene.

Description

Technical Field

[0001] The invention relates to the technical field of materials, and in particular to a reinforced modified ultra-high molecular weight PE water supply pipe and a production process thereof. Background Art

[0002] In modern water supply and drainage systems, the choice of pipe materials is directly related to the safety, stability and efficiency of the system. Among the many pipe materials, ultra-high molecular weight polyethylene has excellent wear resistance, chemical corrosion resistance and antifreeze properties. Therefore, the maintenance cost of pipes made of ultra-high molecular weight polyethylene as the base material is low after operation. Therefore, it has been more and more widely used in the field of water supply pipes in recent years.

[0003] Although ultra-high molecular weight polyethylene has certain tensile strength and impact strength, it still needs to be further enhanced in some applications that require higher mechanical properties, such as deep-sea water pipelines. In addition, as a polymer material, ultra-high molecular weight polyethylene also has poor antioxidant properties, which makes the pipeline prone to aging and damage after long-term use. This damage may cause greater property losses. Therefore, strengthening and modifying ultra-high molecular weight polyethylene is of great significance for its application in the field of water supply pipes.

[0004] At present, the purpose of enhancing the various properties of polymer materials is generally achieved by adding additives such as fibers and antioxidants and mixing them with polymer materials. For example, the invention patent with publication number CN115572428A discloses a water supply pipe and a preparation method thereof, in which EPDM rubber, paraffin oil, titanium powder and calcium carbonate are compounded to form reinforcement particles. By utilizing the advantages of titanium powder and calcium titanate as inorganic reinforcing agents, the tensile strength and other properties of polyethylene can be improved. However, when inorganic materials are used to enhance and modify polyethylene, it is necessary to overcome the interface problems between each other, otherwise the performance of the material may be negatively affected due to agglomeration problems. Summary of the invention

[0005] In order to solve the problems mentioned in the background technology, the purpose of the present invention is to provide a reinforced modified ultra-high molecular weight PE water supply pipe and a production process thereof.

[0006] The purpose of the present invention can be achieved through the following technical solutions:

[0007] A production process of a reinforced modified ultra-high molecular weight PE water supply pipe, wherein the PE water supply pipe is made of the following raw materials in parts by weight:

[0008] Ultra high molecular weight polyethylene 72-78 parts;

[0009] 8-12 parts of expander;

[0010] 0.2-0.4 parts of polymeric macromolecular antioxidant;

[0011] 3.5-5 parts of modified aluminum silicate fiber;

[0012] 6-10 parts of rubber modifier;

[0013] 5-8 parts of filler;

[0014] Lubricant 0.5-1.5 parts;

[0015] The production process comprises the following steps:

[0016] The first step is to weigh each raw material according to the weight and set aside;

[0017] Step 2: Add all raw materials into a mixer, control the mixing temperature to 120-130°C, mechanically stir and mix at a speed of 500-1000r / min for 30-60min, stop heating, and form a precursor after cooling;

[0018] The third step is to feed the precursor material into the twin-screw extruder through the feeding hopper, control the screw speed to 80-90r / min, the temperature to 180-200℃, extrude the material into the mold, control the mold temperature to 200-210℃, and then extrude it from the mold and perform cooling and shaping process to obtain the PE water supply pipe.

[0019] As a further embodiment of the present invention, the compatibilizer is maleic anhydride grafted polyethylene, and the grafting rate of maleic anhydride is 0.7-1.2%.

[0020] As a further embodiment of the present invention, the preparation method of the polymeric macromolecular antioxidant comprises the following steps:

[0021] Step S1, adding 3-bromo-2-bromomethylpropionic acid to tetrahydrofuran, mechanically stirring to form a uniform reaction solution, passing nitrogen protection, then adding an activator to the reaction solution, activating at room temperature for 1-2 hours, and then adding 3,5-di-tert-butyl-4-hydroxybenzyl alcohol to the reaction solution. After the addition is completed, stirring is continued at room temperature for 2-4 hours, the solvent is removed by rotary evaporation, and the intermediate product is collected;

[0022] Step S2, adding the intermediate product and the diamine chain extender to toluene in sequence, stirring and mixing evenly, introducing nitrogen to exhaust the air, and then gradually raising the temperature to 60-70° C., mechanically stirring for 8-12 hours in this temperature environment, and evaporating and removing the solvent to obtain a polymerized macromolecular antioxidant.

[0023] As a further embodiment of the present invention, in step S1, the activator is a mixture of dicyclohexylcarbodiimide and N-hydroxysuccinimide in a mass ratio of 1:0.2-0.3.

[0024] As a further embodiment of the present invention, in step S2, the diamine chain extender is any one of 1,5-diaminopentane, 1,6-hexanediamine or 1,8-octanediamine.

[0025] In the above technical scheme, an activator is first used to activate the active substituted carboxyl group in the structure of 3-bromo-2-bromomethylpropionic acid, so that it can undergo esterification condensation with the benzyl alcohol substituent in the structure of 3,5-di-tert-butyl-4-hydroxybenzyl alcohol to form an intermediate product containing two equivalents of halogen substituents in the structure, and then a diamine chain extender is used to perform chain extension polymerization to obtain a macromolecular antioxidant with a hindered phenol block structure.

[0026] As a further embodiment of the present invention, the method for preparing the modified aluminum silicate fiber comprises the following steps:

[0027] Step SS1, dispersing aluminum silicate fiber in 1,4-dioxane, and adding halogenated acylate and pyridine to the formed dispersion, after adding, controlling the temperature to 40-50° C., stirring for 3-6 hours, centrifuging the material to obtain modified aluminum silicate fiber material;

[0028] Step SS2, ultrasonically disperse the modified aluminum silicate fiber material in N,N-dimethylformamide, add diethanolamine to the formed dispersion under nitrogen protection, then increase the temperature to 60-70°C, keep stirring for 1-2 hours, then reduce the temperature to 40-45°C, and then add trimellitic anhydride chloride and a phase transfer catalyst to the dispersion. After the addition, control the temperature to 90-100°C, continue stirring for 12-18 hours, and centrifuge to separate the material to obtain the modified aluminum silicate fiber.

[0029] As a further embodiment of the present invention, in step SS1, the halogenated acylate is any one of chloroacetyl chloride, bromoacetyl chloride or 4-bromobutyryl chloride.

[0030] As a further embodiment of the present invention, in step SS2, the phase transfer catalyst is p-toluenesulfonic acid or trifluoromethanesulfonic acid.

[0031] In the above technical scheme, the aluminum silicate fiber is firstly surface-modified with a halogenated acylate to generate halogen functional groups on the surface of the aluminum silicate fiber to obtain a modified aluminum silicate fiber. Then, the high activity of the secondary amine group is utilized and diethanolamine is used as a further modifier to replace the halogen functional groups. Subsequently, trimellitic anhydride chloride is added as a polymerization monomer to carry out uninterrupted esterification condensation with the active substituted hydroxyl groups in the diethanolamine, thereby coating the surface of the aluminum silicate fiber with a polyester macromolecular substance connected by ester bonds, i.e., a modified aluminum silicate fiber.

[0032] As a further embodiment of the present invention, the rubber modifier is any one of EPDM rubber, nitrile rubber or polybutadiene rubber; the filler is any one of talc, kaolin or titanium dioxide; and the lubricant is polyethylene wax or stearic acid.

[0033] A reinforced modified ultra-high molecular weight PE water supply pipe is produced by adopting the above production process.

[0034] Beneficial effects of the present invention:

[0035] (1) The polymeric macromolecular antioxidant prepared by the present invention contains a large number of hindered phenol antioxidant groups in its structure, so that a small amount of addition can significantly improve the antioxidant performance of ultra-high molecular weight polyethylene. Moreover, the secondary amine groups generated during the chain extension reaction can interact with the maleic anhydride groups in the compatibilizer structure during the melt extrusion process, so that the polymeric macromolecular antioxidant can be connected to the ultra-high molecular weight polyethylene matrix in the form of a chemical bond, which can effectively avoid the precipitation of the antioxidant, so as to perform long-term antioxidant modification on the ultra-high molecular weight polyethylene.

[0036] (2) The aluminum silicate fiber modification prepared by the present invention is a fiber having a surface coated with a polyester macromolecular substance. This macromolecular substance can extend into the molecular chain network of ultra-high molecular weight polyethylene during the melt extrusion process, which is equivalent to forming a transition connection layer between the aluminum silicate fiber and the ultra-high molecular weight polyethylene matrix, so that the aluminum silicate fiber can be embedded in the ultra-high molecular weight polyethylene to achieve a uniform dispersion effect, and then effectively exert its own advantages as an inorganic material. When the material is subjected to external stress, it produces a good stress dispersion and load transfer effect, thereby effectively enhancing the mechanical strength of the ultra-high molecular weight polyethylene.

[0037] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0039] Figure 1 This is the infrared analysis test diagram of polymeric macromolecular antioxidant. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0041] Preparation Example 1

[0042] Preparation of polymeric macromolecular antioxidants:

[0043] Step S1, adding 0.4 g of 3-bromo-2-bromomethylpropionic acid to tetrahydrofuran, mechanically stirring to form a uniform reaction solution, passing nitrogen protection, then adding 0.1 g of dicyclohexylcarbodiimide and 0.03 g of N-hydroxysuccinimide to the reaction solution, activating at room temperature for 2 hours, and then adding 0.4 g of 3,5-di-tert-butyl-4-hydroxybenzyl alcohol to the reaction solution. After the addition is completed, stirring is continued at room temperature for 3 hours, the solvent is removed by rotary evaporation, and the intermediate product is collected;

[0044] Step S2, add 0.6g of the intermediate product and 0.1g of 1,6-hexanediamine to toluene in sequence, stir and mix evenly, introduce nitrogen to expel the air, then gradually increase the temperature to 65°C, mechanically stir for 9h in this temperature environment, evaporate and remove the solvent, and a polymerized macromolecular antioxidant can be obtained.

[0045] This polymeric macromolecular antioxidant was made into potassium bromide tablets and subjected to infrared characterization. Figure 1 This is the infrared analysis test diagram of the polymer macromolecular antioxidant. The analysis shows that 3401cm -1 The absorption peak at 3289 cm is the characteristic absorption peak of secondary amine. -1 The absorption peak at 2800 cm is the characteristic absorption peak of the hydroxyl group in the hindered phenol structure. -1 ~3000cm -1 The absorption peaks at 1750cm are the characteristic absorption peaks of carbon and hydrogen of methyl and methylene. -1 The absorption peak that appears at is the characteristic absorption peak of the ester group's carbon-oxygen double bond.

[0046] Preparation Example 2

[0047] Preparation of the modified aluminum silicate fiber:

[0048] Step SS1, dispersing 1.6 g of aluminum silicate fiber in 1,4-dioxane, and adding 3.5 g of chloroacetyl chloride and 0.5 g of pyridine to the formed dispersion, after the addition, controlling the temperature to 45° C., keeping warm and stirring for 6 hours, centrifuging the material to obtain a modified aluminum silicate fiber material;

[0049] Step SS2, ultrasonically disperse 1.2g of modified aluminum silicate fiber in N,N-dimethylformamide, add 2g of diethanolamine to the formed dispersion under nitrogen protection, then raise the temperature to 65°C, keep stirring for 2h, lower the temperature to 40°C, then add 3.5g of trimellitic anhydride chloride and 0.3g of p-toluenesulfonic acid to the dispersion, after the addition, control the temperature to 100°C, continue stirring for 16h, centrifuge and separate the material to obtain the modified aluminum silicate fiber.

[0050] The soap back titration test method was used to test the ester content of the modified aluminum silicate fiber. 0.3 g of the modified aluminum silicate fiber was taken as the test sample. The experiment was repeated three times and the average value was taken. The test showed that the ester content of the sample was 4.151 mmol / g.

[0051] Example 1

[0052] A reinforced modified ultra-high molecular weight PE water supply pipe is made of the following raw materials in parts by weight:

[0053] Ultra high molecular weight polyethylene 72 parts;

[0054] 8 parts of extender;

[0055] 0.2 parts of polymeric macromolecular antioxidant;

[0056] 3.5 parts of modified aluminum silicate fiber;

[0057] 6 parts of EPDM rubber;

[0058] 5 parts of talcum powder;

[0059] 0.5 parts of stearic acid;

[0060] The production process of the PE water supply pipe comprises the following steps:

[0061] The first step is to weigh each raw material according to the weight and set aside;

[0062] Step 2: Add all raw materials into a mixer, control the mixing temperature to 120°C, mechanically stir and mix at a speed of 1000r / min for 30min, stop heating, and cool to form a precursor;

[0063] The third step is to feed the precursor material into the twin-screw extruder through the feeding hopper, control the screw speed to 80r / min, the temperature to 180℃, extrude the material into the mold, control the mold temperature to 200℃, and then perform cooling and shaping process after extrusion from the mold to obtain the PE water supply pipe.

[0064] The compatibilizer is maleic anhydride grafted polyethylene, and the grafting rate of maleic anhydride is 1.2%; the polymeric macromolecular antioxidant is prepared by the method of Preparation Example 1; the aluminum silicate fiber modification is prepared by the method of Preparation Example 2, and the same applies below.

[0065] Example 2

[0066] A reinforced modified ultra-high molecular weight PE water supply pipe is made of the following raw materials in parts by weight:

[0067] Ultra high molecular weight polyethylene 76 parts;

[0068] 10 parts of expander;

[0069] 0.3 parts of polymeric macromolecular antioxidant;

[0070] 4 parts of modified aluminum silicate fiber;

[0071] 8 parts of nitrile rubber;

[0072] 6 parts of kaolin;

[0073] 1 part of polyethylene wax;

[0074] The production process of the PE water supply pipe comprises the following steps:

[0075] The first step is to weigh each raw material according to the weight and set aside;

[0076] Step 2: Add all raw materials into a mixer, control the mixing temperature to 130°C, mechanically stir and mix at a speed of 500r / min for 40min, stop heating, and cool to form a precursor;

[0077] The third step is to feed the precursor material into the twin-screw extruder through the feeding hopper, control the screw speed to 80r / min, the temperature to 200℃, extrude the material into the mold, control the mold temperature to 210℃, and then extrude it from the mold and perform cooling and shaping process to produce the PE water supply pipe.

[0078] Example 3

[0079] A reinforced modified ultra-high molecular weight PE water supply pipe is made of the following raw materials in parts by weight:

[0080] Ultra high molecular weight polyethylene 78 parts;

[0081] 12 parts of expander;

[0082] 0.4 parts of polymeric macromolecular antioxidant;

[0083] 5 parts of modified aluminum silicate fiber;

[0084] 10 parts of polybutadiene rubber;

[0085] 8 parts of titanium dioxide;

[0086] 1.5 parts of polyethylene wax;

[0087] The production process of the PE water supply pipe comprises the following steps:

[0088] The first step is to weigh each raw material according to the weight and set aside;

[0089] Step 2: Add all raw materials into a mixer, control the mixing temperature to 130°C, mechanically stir and mix at a speed of 800r / min for 30min, stop heating, and cool to form a precursor;

[0090] The third step is to feed the precursor material into the twin-screw extruder through the feeding hopper, control the screw speed to 90r / min, the temperature to 200℃, extrude the material into the mold, control the mold temperature to 210℃, and then extrude it from the mold and perform cooling and shaping process to obtain the PE water supply pipe.

[0091] Comparative Example 1

[0092] A reinforced modified ultra-high molecular weight PE water supply pipe is made of the following raw materials in parts by weight:

[0093] Ultra high molecular weight polyethylene 76 parts;

[0094] 10 parts of expander;

[0095] Antioxidant 1010 0.3 parts;

[0096] 4 parts of modified aluminum silicate fiber;

[0097] 8 parts of nitrile rubber;

[0098] 6 parts of kaolin;

[0099] 1 part of polyethylene wax;

[0100] The production process of the PE water supply pipe comprises the following steps:

[0101] The first step is to weigh each raw material according to the weight and set aside;

[0102] Step 2: Add all raw materials into a mixer, control the mixing temperature to 130°C, mechanically stir and mix at a speed of 500r / min for 40min, stop heating, and cool to form a precursor;

[0103] The third step is to feed the precursor material into the twin-screw extruder through the feeding hopper, control the screw speed to 80r / min, the temperature to 200℃, extrude the material into the mold, control the mold temperature to 210℃, and then extrude it from the mold and perform cooling and shaping process to produce the PE water supply pipe.

[0104] Comparative Example 2

[0105] A reinforced modified ultra-high molecular weight PE water supply pipe is made of the following raw materials in parts by weight:

[0106] Ultra high molecular weight polyethylene 76 parts;

[0107] 10 parts of expander;

[0108] 0.3 parts of polymeric macromolecular antioxidant;

[0109] 4 parts of aluminum silicate fiber;

[0110] 8 parts of nitrile rubber;

[0111] 6 parts of kaolin;

[0112] 1 part of polyethylene wax;

[0113] The production process of the PE water supply pipe comprises the following steps:

[0114] The first step is to weigh each raw material according to the weight and set aside;

[0115] Step 2: Add all raw materials into a mixer, control the mixing temperature to 130°C, mechanically stir and mix at a speed of 500r / min for 40min, stop heating, and cool to form a precursor;

[0116] The third step is to feed the precursor material into the twin-screw extruder through the feeding hopper, control the screw speed to 80r / min, the temperature to 200℃, extrude the material into the mold, control the mold temperature to 210℃, and then extrude it from the mold and perform cooling and shaping process to produce the PE water supply pipe.

[0117] Comparative Example 3

[0118] A reinforced modified ultra-high molecular weight PE water supply pipe is made of the following raw materials in parts by weight:

[0119] Ultra high molecular weight polyethylene 76 parts;

[0120] 10 parts of expander;

[0121] 0.3 parts of polymeric macromolecular antioxidant;

[0122] 8 parts of nitrile rubber;

[0123] 6 parts of kaolin;

[0124] 1 part of polyethylene wax;

[0125] The production process of the PE water supply pipe comprises the following steps:

[0126] The first step is to weigh each raw material according to the weight and set aside;

[0127] Step 2: Add all raw materials into a mixer, control the mixing temperature to 130°C, mechanically stir and mix at a speed of 500r / min for 40min, stop heating, and cool to form a precursor;

[0128] The third step is to feed the precursor material into the twin-screw extruder through the feeding hopper, control the screw speed to 80r / min, the temperature to 200℃, extrude the material into the mold, control the mold temperature to 210℃, and then extrude it from the mold and perform cooling and shaping process to produce the PE water supply pipe.

[0129] Test Case

[0130] Various performance tests were performed on the PE water supply pipes in the embodiments and comparative examples, and the results are recorded in Table 1:

[0131] Table 1 - Test results

[0132]

[0133] The test method for tensile strength refers to GB / T 1040-1992. After the test, the test samples of the same batch are stored at room temperature for 3 months, taken out, and then kept at 80°C for 24 hours. The tensile strength is tested again to evaluate the aging resistance. The test method for tensile strength refers to GB / T 9341-2008; the test method for impact strength refers to GB / T 1843-2008.

[0134] Analysis shows that after adding the polymeric macromolecular antioxidant prepared in Preparation Example 1 of the present invention and the aluminum silicate fiber modification prepared in Preparation Example 2 of the present invention, the prepared PE water supply pipe obviously shows excellent mechanical strength, and the tensile strength decreases less after high-temperature thermal oxygen accelerated aging, so it has good aging resistance.

[0135] After the polymerized macromolecular antioxidant was replaced with the conventional small molecule antioxidant 1010, the tensile strength of the material was significantly reduced after high-temperature accelerated aging due to the possible volatilization and migration of the antioxidant during storage.

[0136] After the aluminum silicate fiber modification was replaced with aluminum silicate fiber, the compatibility problem between aluminum silicate fiber and polyethylene matrix prevented the reinforcement effect from being effectively exerted, so the mechanical properties decreased significantly. After the aluminum silicate fiber modification was directly removed, the mechanical properties of the material further decreased.

[0137] Specific examples are used herein to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core ideas, including the best mode, and also enable any technician in the field to practice the present invention, including making and using any device or system, and implementing any combined method. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the present invention, the present invention can also be improved and modified, and these improvements and modifications also fall within the scope of protection of the claims of the present invention. The scope of patent protection of the present invention is defined by the claims and may include other embodiments that can be thought of by those skilled in the art. If these other embodiments have structural elements similar to the literal expression of the claims, or if they include equivalent structural elements that are not substantially different from the literal expression of the claims, then these other embodiments should also be included in the scope of the claims.

Claims

1. A production process for a reinforced modified ultra-high molecular weight PE water supply pipe, characterized in that: The PE water supply pipe is made of the following raw materials in parts by weight: Ultra high molecular weight polyethylene 72-78 parts; 8-12 parts of expander; 0.2-0.4 parts of polymeric macromolecular antioxidant; 3.5-5 parts of modified aluminum silicate fiber; 6-10 parts of rubber modifier; 5-8 parts of filler; Lubricant 0.5-1.5 parts; The production process comprises the following steps: The first step is to weigh each raw material according to the weight and set aside; Step 2: Add all raw materials into a mixer, control the mixing temperature to 120-130°C, mechanically stir and mix at a speed of 500-1000r / min for 30-60min, stop heating, and form a precursor after cooling; The third step is to feed the precursor material into the twin-screw extruder through the feeding hopper, control the screw speed to 80-90r / min, the temperature to 180-200℃, extrude the material into the mold, control the mold temperature to 200-210℃, and then extrude it from the mold, perform cooling and shaping process, and then the PE water supply pipe can be obtained; The preparation method of the polymeric macromolecular antioxidant comprises the following steps: Step S1, adding 3-bromo-2-bromomethylpropionic acid to tetrahydrofuran, mechanically stirring to form a uniform reaction solution, passing nitrogen protection, then adding an activator to the reaction solution, activating at room temperature for 1-2 hours, and then adding 3,5-di-tert-butyl-4-hydroxybenzyl alcohol to the reaction solution. After the addition is completed, stirring is continued at room temperature for 2-4 hours, the solvent is removed by rotary evaporation, and the intermediate product is collected; Step S2, adding the intermediate product and the diamine chain extender to toluene in sequence, stirring and mixing evenly, introducing nitrogen to exhaust the air, and then gradually raising the temperature to 60-70° C., mechanically stirring for 8-12 hours in this temperature environment, and evaporating and removing the solvent to obtain a polymerized macromolecular antioxidant; The activator is a mixture of dicyclohexylcarbodiimide and N-hydroxysuccinimide in a mass ratio of 1:0.2-0.3; The preparation method of the modified aluminum silicate fiber comprises the following steps: Step SS1, dispersing aluminum silicate fiber in 1,4-dioxane, and adding halogenated acylate and pyridine to the formed dispersion, after adding, controlling the temperature to 40-50° C., stirring for 3-6 hours, centrifuging the material to obtain modified aluminum silicate fiber material; Step SS2, ultrasonically dispersing the modified aluminum silicate fiber material in N,N-dimethylformamide, adding diethanolamine to the formed dispersion under nitrogen protection, then raising the temperature to 60-70°C, stirring for 1-2 hours, lowering the temperature to 40-45°C, and then adding trimellitic anhydride chloride and a phase transfer catalyst to the dispersion. After the addition, controlling the temperature to 90-100°C, stirring for 12-18 hours, and centrifuging to separate the material to obtain the modified aluminum silicate fiber; The rubber modifier is any one of EPDM rubber, nitrile rubber or polybutadiene rubber.

2. The production process of a reinforced modified ultra-high molecular weight PE water supply pipe according to claim 1, characterized in that: The compatibilizer is maleic anhydride grafted polyethylene, and the grafting rate of maleic anhydride is 0.7-1.2%.

3. The production process of a reinforced modified ultra-high molecular weight PE water supply pipe according to claim 1, characterized in that: In step S2, the diamine chain extender is any one of 1,5-diaminopentane, 1,6-hexanediamine or 1,8-octanediamine.

4. The production process of a reinforced modified ultra-high molecular weight PE water supply pipe according to claim 1, characterized in that: In step SS1, the halogenated acylate is any one of chloroacetyl chloride, bromoacetyl chloride or 4-bromobutyryl chloride.

5. The production process of a reinforced modified ultra-high molecular weight PE water supply pipe according to claim 1, characterized in that: In step SS2, the phase transfer catalyst is p-toluenesulfonic acid or trifluoromethanesulfonic acid.

6. The production process of a reinforced modified ultra-high molecular weight PE water supply pipe according to claim 1, characterized in that: The filler is any one of talc, kaolin or titanium dioxide; the lubricant is polyethylene wax or stearic acid.

7. A reinforced modified ultra-high molecular weight PE water supply pipe, characterized in that: The method is prepared by the production process as claimed in claim 1.

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