CN112521645A - High-strength wear-resistant plastic valve pipe fitting and preparation method thereof - Google Patents
High-strength wear-resistant plastic valve pipe fitting and preparation method thereof Download PDFInfo
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- CN112521645A CN112521645A CN202011431255.5A CN202011431255A CN112521645A CN 112521645 A CN112521645 A CN 112521645A CN 202011431255 A CN202011431255 A CN 202011431255A CN 112521645 A CN112521645 A CN 112521645A
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- 229920003023 plastic Polymers 0.000 title claims abstract description 54
- 239000004033 plastic Substances 0.000 title claims abstract description 54
- 238000002360 preparation method Methods 0.000 title claims abstract description 10
- 230000005764 inhibitory process Effects 0.000 claims abstract description 9
- 239000011248 coating agent Substances 0.000 claims abstract description 8
- 238000000576 coating method Methods 0.000 claims abstract description 8
- 239000003973 paint Substances 0.000 claims abstract description 7
- 239000007822 coupling agent Substances 0.000 claims description 17
- 239000003822 epoxy resin Substances 0.000 claims description 15
- 229920000647 polyepoxide Polymers 0.000 claims description 15
- 239000002270 dispersing agent Substances 0.000 claims description 14
- 229920000092 linear low density polyethylene Polymers 0.000 claims description 14
- 239000004707 linear low-density polyethylene Substances 0.000 claims description 14
- 239000000314 lubricant Substances 0.000 claims description 14
- 239000000463 material Substances 0.000 claims description 13
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 claims description 11
- 229920001038 ethylene copolymer Polymers 0.000 claims description 11
- 239000012760 heat stabilizer Substances 0.000 claims description 11
- 229920003145 methacrylic acid copolymer Polymers 0.000 claims description 11
- 239000004594 Masterbatch (MB) Substances 0.000 claims description 10
- 238000001816 cooling Methods 0.000 claims description 10
- 238000007599 discharging Methods 0.000 claims description 10
- 238000002156 mixing Methods 0.000 claims description 10
- 229920004889 linear high-density polyethylene Polymers 0.000 claims description 9
- 239000000203 mixture Substances 0.000 claims description 6
- 239000002994 raw material Substances 0.000 claims description 6
- 238000001125 extrusion Methods 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 claims description 5
- 238000001746 injection moulding Methods 0.000 claims description 5
- 238000003756 stirring Methods 0.000 claims description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 4
- 230000001681 protective effect Effects 0.000 claims description 4
- 239000000377 silicon dioxide Substances 0.000 claims description 2
- 229920002050 silicone resin Polymers 0.000 claims description 2
- 235000012239 silicon dioxide Nutrition 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- 238000000034 method Methods 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 229920001903 high density polyethylene Polymers 0.000 description 7
- 239000004700 high-density polyethylene Substances 0.000 description 7
- 239000004566 building material Substances 0.000 description 5
- 239000004698 Polyethylene Substances 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- 239000001993 wax Substances 0.000 description 4
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical group [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 3
- 239000004841 bisphenol A epoxy resin Substances 0.000 description 3
- 238000002844 melting Methods 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- 229920000915 polyvinyl chloride Polymers 0.000 description 3
- 239000004800 polyvinyl chloride Substances 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 230000007774 longterm Effects 0.000 description 2
- 229920001684 low density polyethylene Polymers 0.000 description 2
- 239000004702 low-density polyethylene Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000012188 paraffin wax Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 229930185605 Bisphenol Natural products 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- IISBACLAFKSPIT-UHFFFAOYSA-N bisphenol A Chemical compound C=1C=C(O)C=CC=1C(C)(C)C1=CC=C(O)C=C1 IISBACLAFKSPIT-UHFFFAOYSA-N 0.000 description 1
- 239000004842 bisphenol F epoxy resin Substances 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000005038 ethylene vinyl acetate Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000035882 stress Effects 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
- C08J7/04—Coating
- C08J7/046—Forming abrasion-resistant coatings; Forming surface-hardening coatings
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
- C08J7/04—Coating
- C08J7/06—Coating with compositions not containing macromolecular substances
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/04—Homopolymers or copolymers of ethene
- C08L23/06—Polyethene
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
- C08J2323/04—Homopolymers or copolymers of ethene
- C08J2323/06—Polyethene
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2483/00—Characterised by the use of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon with or without sulfur, nitrogen, oxygen, or carbon only; Derivatives of such polymers
- C08J2483/04—Polysiloxanes
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2207/00—Properties characterising the ingredient of the composition
- C08L2207/06—Properties of polyethylene
- C08L2207/062—HDPE
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2207/00—Properties characterising the ingredient of the composition
- C08L2207/06—Properties of polyethylene
- C08L2207/066—LDPE (radical process)
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- Chemical & Material Sciences (AREA)
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- Chemical Kinetics & Catalysis (AREA)
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- Rigid Pipes And Flexible Pipes (AREA)
Abstract
The high-strength wear-resistant plastic valve pipe fitting comprises a plastic pipe fitting, wherein a scale inhibition inner layer is arranged on the inner wall of the plastic pipe fitting, a protection outer layer is arranged on the outer wall of the plastic pipe fitting, and the scale inhibition inner layer is formed by coating high-temperature wear-resistant paint on the inner wall of the plastic pipe fitting and curing the paint. The invention also discloses a preparation method of the high-strength wear-resistant plastic valve pipe fitting. The invention has the following beneficial effects: the high-strength wear-resistant pipe has the outstanding advantages of high rigidity, wear resistance and high strength, and can keep excellent wear resistance performance even at high temperature, and prevent the pipe from generating creep deformation at high temperature. The production process is simple, the operation and the control are convenient, the quality is stable, the production efficiency is high, the production cost is low, the application range is wide, and the method has wide industrialization and market prospects.
Description
Technical Field
The invention relates to a high-strength wear-resistant plastic valve pipe fitting and a preparation method thereof, and belongs to the technical field of plastic pipe fitting processing and manufacturing.
Background
The plastic pipe is a chemical building material compounded by high technology, the chemical building material is a fourth novel building material which is emerging in the present generation after steel, wood and cement, the chemical building material has long-term progress and rapid development in China, and particularly, the wide use of the novel environment-friendly plastic pipe raises a revolution of replacing the traditional building material.
However, in the practical application process, especially in the direct sunlight environment, the existing plastic pipe is easily affected by high temperature sunlight to cause deformation and aging of the pipe, which leads to a series of problems such as cracking of the pipe and seriously affects the service life of the plastic pipe. In addition, the existing plastic pipe fittings are often dragged on the ground, so that the outer wall of the plastic pipe is easily damaged by friction, and the service life is shortened.
Therefore, it is necessary to design a PE plastic corrugated pipe with high toughness, long-term absorption of harmful stress, wear resistance and long service life.
Disclosure of Invention
According to the defects in the prior art, the technical problems to be solved by the invention are as follows: in order to solve one of the problems, a high-strength wear-resistant plastic valve pipe fitting and a preparation method thereof are provided.
The invention relates to a high-strength wear-resistant plastic valve pipe fitting, which is characterized in that: the scale inhibition inner layer is formed by coating high-temperature wear-resistant paint on the inner wall of the plastic pipe and curing the high-temperature wear-resistant paint.
Preferably, the thickness of the scale inhibition inner layer is 8-10mm, in particular to a silicone resin coating.
Preferably, the protective outer layer has a thickness of 8-10mm and is provided with a silica wear-resistant coating.
The invention also discloses a preparation method of the high-strength wear-resistant plastic valve pipe fitting, which is characterized by comprising the following steps of: the plastic pipe fitting comprises the following raw materials in parts by weight: 100 parts of linear high-density polyethylene and 0-10 parts of linear low-density polyethylene; 10-20 parts of methacrylic acid/ethylene copolymer; 1-20 parts of epoxy resin; 1.0-10 parts of a heat stabilizer; 0.1-10 parts of a lubricant; 1-20 parts of a coupling agent; 1.0-10 parts of dispersing agent, and sequentially adding 10-20 parts of methacrylic acid/ethylene copolymer into a high-speed mixer in percentage by weight; 1-20 parts of epoxy resin; 1.0-10 parts of a heat stabilizer; 0.1-10 parts of a lubricant; 1-20 parts of coupling agent and 1.0-10 parts of dispersing agent, stirring at a high speed for 8-10 minutes, heating at 40-105 ℃ by a high-speed mixer, discharging and cooling; the obtained cooling material, 100 parts of linear high-density polyethylene and 0-10 parts of linear low-density polyethylene; adding the mixture into an internal mixer for internal mixing, and discharging when the internal mixing is carried out to the temperature of 120-; extruding and granulating the obtained material block by a rubber-plastic single-screw extruder, setting the extrusion temperature at 160 ℃ and 190 ℃ to obtain functional master batch; and the obtained functional master batch is used for producing the plastic pipe fitting by an injection molding machine.
Preferably, the high density polyethylene and the linear low density polyethylene are both in powder form and have MFR values of 0.4 to 0.8g/10min and 2 to 10g/10min, respectively.
Preferably, the dispersing agent is one or a mixture of PE wax, paraffin wax and EVA wax, and the melting point is above 60 ℃.
Preferably, the lubricant is one of white oil, mechanical oil, chlorinated paraffin or a mixture thereof.
Preferably, the coupling agent is a titanate coupling agent.
Preferably, the plastic pipe fitting comprises the following raw materials in parts by weight: 100 parts of high-density polyethylene; 5 parts of low-density polyethylene; 15 parts of methacrylic acid/ethylene copolymer; 1 part of epoxy resin; 1 part of a heat stabilizer; 1 part of a lubricant; a coupling agent 1; 1 part of a dispersant.
Preferably, the Vicat softening temperature of the plastic pipe fitting can be changed within the range of 90-105 ℃, the tensile strength can reach 50-57 MPa, the notch impact strength can be improved by 20-70%, and the processing rheological property is similar to that of a common polyvinyl chloride material.
Preferably, the epoxy resin is one or a mixture of more than two of bisphenol-A epoxy resin, bisphenol f epoxy resin and bisphenol s epoxy resin.
Compared with the prior art, the invention has the following beneficial effects:
the invention also discloses a high-strength wear-resistant plastic valve pipe fitting which has the outstanding advantages of high rigidity, wear resistance and high strength, and can keep excellent wear resistance even at high temperature, so that the pipe fitting is prevented from generating creep deformation at high temperature.
The production process is simple, the operation and the control are convenient, the quality is stable, the production efficiency is high, the production cost is low, the application range is wide, and the method has wide industrialization and market prospects.
Detailed Description
The invention is further described below with reference to examples:
the present invention is further illustrated by the following specific examples, which are not intended to limit the scope of the invention, and any modifications, equivalents, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.
Example one
The high-strength wear-resistant plastic valve pipe fitting comprises a plastic pipe fitting, wherein a scale inhibition inner layer is arranged on the inner wall of the plastic pipe fitting, a protection outer layer is arranged on the outer wall of the plastic pipe fitting, and the scale inhibition inner layer is formed by coating high-temperature wear-resistant paint on the inner wall of the plastic pipe fitting through curing.
In the embodiment, the thickness of the scale inhibition inner layer is 9 mm; the thickness of the protective outer layer is 9 mm.
Example two
The invention also discloses a preparation method of the high-strength wear-resistant plastic valve pipe fitting, and the plastic pipe fitting mainly comprises the following raw material components in parts by mass: 100 parts of high-density polyethylene, 5 parts of low-density polyethylene and 18 parts of methacrylic acid/ethylene copolymer; 1 part of epoxy resin; 1 part of a heat stabilizer; 1 part of a lubricant; a coupling agent 1; 1 part of a dispersing agent, namely,
sequentially adding methacrylic acid/ethylene copolymer, epoxy resin, heat stabilizer, lubricant, coupling agent and dispersant into a high-speed mixer in percentage by weight, stirring at a high speed for 10 minutes, heating the high-speed mixer to 85 ℃, discharging and cooling; adding the obtained cooling material, linear high-density polyethylene and linear low-density polyethylene into an internal mixer for internal mixing, and discharging when the internal mixing is carried out to 125 ℃ and 175 ℃; extruding and granulating the obtained material block by a rubber-plastic single-screw extruder, and setting the extrusion temperature at 180 ℃ to obtain a functional master batch; the obtained functional master batch is used for producing plastic pipe fittings through an injection molding machine; the high-density polyethylene and the linear low-density polyethylene are both powder, and MFR values of the high-density polyethylene and the linear low-density polyethylene are respectively 0.5g/10min and 8g/10 min; the dispersing agent is PE wax, and the melting point is above 60 ℃; the lubricant is white oil; the coupling agent is a titanate coupling agent; the epoxy resin is bisphenol-A epoxy resin.
The Vicat softening temperature of the plastic pipe fitting can be changed within 106 ℃, the tensile strength can reach 56MPa, the notch impact strength can be improved by 69%, and the processing rheological property is similar to that of the common polyvinyl chloride material.
The Vicat softening temperature is measured by a thermal deformation Vicat softening point temperature measuring instrument, the tensile strength is measured by a tensile strength testing machine, and the notch impact strength adopts two testing methods, namely simple beam impact and radial beam impact.
EXAMPLE III
The invention also discloses a preparation method of the high-strength wear-resistant plastic valve pipe fitting, and the plastic pipe fitting mainly comprises the following raw material components in parts by mass: 100 parts of linear high-density polyethylene and 10 parts of linear low-density polyethylene; 18 parts of methacrylic acid/ethylene copolymer; 15 parts of epoxy resin; 3 parts of a heat stabilizer; 2 parts of a lubricant; 5 parts of a coupling agent; 5 parts of a dispersing agent, namely,
sequentially adding methacrylic acid/ethylene copolymer, epoxy resin, heat stabilizer, lubricant, coupling agent and dispersant into a high-speed mixer in percentage by weight, stirring at a high speed for 10 minutes, heating the high-speed mixer to 85 ℃, discharging and cooling; adding the obtained cooling material, linear high-density polyethylene and linear low-density polyethylene into an internal mixer for internal mixing, and discharging when the internal mixing is carried out to 125 ℃ and 175 ℃; extruding and granulating the obtained material block by a rubber-plastic single-screw extruder, and setting the extrusion temperature at 180 ℃ to obtain a functional master batch; the obtained functional master batch is used for producing plastic pipe fittings through an injection molding machine; the high-density polyethylene and the linear low-density polyethylene are both powder, and MFR values of the high-density polyethylene and the linear low-density polyethylene are respectively 0.5g/10min and 8g/10 min; the dispersing agent is PE wax, and the melting point is above 60 ℃; the lubricant is white oil; the coupling agent is a titanate coupling agent; the epoxy resin is bisphenol-A epoxy resin.
The Vicat softening temperature of the plastic pipe fitting can be changed within 105 ℃, the tensile strength can reach 67MPa, the notch impact strength can be improved by 65%, and the processing rheological property is similar to that of the common polyvinyl chloride material.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (5)
1. The utility model provides a wear-resisting plastics valve pipe fitting excels in which: the scale inhibition inner layer is formed by coating high-temperature wear-resistant paint on the inner wall of the plastic pipe and curing the high-temperature wear-resistant paint.
2. The high strength, wear resistant plastic valve tubing of claim 2, wherein: the thickness of the scale inhibition inner layer is 8-10mm, and specifically is a silicone resin coating.
3. The high strength, wear resistant plastic valve tubing of claim 2, wherein: the thickness of the protective outer layer is 8-10mm, and the protective outer layer is provided with a silicon dioxide wear-resistant coating.
4. A preparation method of a high-strength wear-resistant plastic valve pipe fitting is characterized by comprising the following steps: the plastic pipe fitting comprises the following raw materials in parts by weight: 100 parts of linear high-density polyethylene and 0-10 parts of linear low-density polyethylene; 10-20 parts of methacrylic acid/ethylene copolymer; 1-20 parts of epoxy resin; 1.0-10 parts of a heat stabilizer; 0.1-10 parts of a lubricant; 1-20 parts of a coupling agent; 1.0 to 10 parts of a dispersant,
sequentially adding 10-20 parts of methacrylic acid/ethylene copolymer into a high-speed mixer in percentage by weight; 1-20 parts of epoxy resin; 1.0-10 parts of a heat stabilizer; 0.1-10 parts of a lubricant; 1-20 parts of coupling agent and 1.0-10 parts of dispersing agent, stirring at a high speed for 8-10 minutes, heating at 40-105 ℃ by a high-speed mixer, discharging and cooling; the obtained cooling material, 100 parts of linear high-density polyethylene and 0-10 parts of linear low-density polyethylene; adding the mixture into an internal mixer for internal mixing, and discharging when the internal mixing is carried out to the temperature of 120-; extruding and granulating the obtained material block by a rubber-plastic single-screw extruder, setting the extrusion temperature at 160 ℃ and 190 ℃ to obtain functional master batch; and the obtained functional master batch is used for producing the plastic pipe fitting by an injection molding machine.
5. A preparation method of a high-strength wear-resistant plastic valve pipe fitting is characterized by comprising the following steps: the plastic pipe fitting comprises the following raw materials in parts by weight: 100 parts of linear high-density polyethylene and 8 parts of linear low-density polyethylene; 15 parts of methacrylic acid/ethylene copolymer; 15 parts of epoxy resin; 3 parts of a heat stabilizer; 3 parts of a lubricant; 8 parts of a coupling agent; 10 parts of dispersing agent, by weight, sequentially adding methacrylic acid/ethylene copolymer into a high-speed mixer; an epoxy resin; a heat stabilizer; a lubricant; stirring the coupling agent and the dispersing agent at a high speed for 10 minutes, heating the mixture by a high-speed mixer at 100 ℃, discharging and cooling; adding the obtained cooling material, 100 parts of linear high-density polyethylene and 0-10 parts of linear low-density polyethylene into an internal mixer for internal mixing, and discharging when the internal mixing is carried out to 120 ℃ and 160 ℃; extruding and granulating the obtained material block by a rubber-plastic single-screw extruder, and setting the extrusion temperature to be 175 ℃ to obtain a functional master batch; and the obtained functional master batch is used for producing the plastic pipe fitting by an injection molding machine.
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