CN110591271A - Pressure-resistant tensile PE pipe and production method thereof - Google Patents
Pressure-resistant tensile PE pipe and production method thereof Download PDFInfo
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- CN110591271A CN110591271A CN201910957150.4A CN201910957150A CN110591271A CN 110591271 A CN110591271 A CN 110591271A CN 201910957150 A CN201910957150 A CN 201910957150A CN 110591271 A CN110591271 A CN 110591271A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F2/00—Processes of polymerisation
- C08F2/38—Polymerisation using regulators, e.g. chain terminating agents, e.g. telomerisation
- C08F2/40—Polymerisation using regulators, e.g. chain terminating agents, e.g. telomerisation using retarding agents
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F255/00—Macromolecular compounds obtained by polymerising monomers on to polymers of hydrocarbons as defined in group C08F10/00
- C08F255/02—Macromolecular compounds obtained by polymerising monomers on to polymers of hydrocarbons as defined in group C08F10/00 on to polymers of olefins having two or three carbon atoms
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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
- C08L51/00—Compositions of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers
- C08L51/06—Compositions of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers grafted on to homopolymers or copolymers of aliphatic hydrocarbons containing only one carbon-to-carbon double bond
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/04—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the coating material
- C23C2/06—Zinc or cadmium or alloys based thereon
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/34—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the shape of the material to be treated
- C23C2/36—Elongated material
- C23C2/38—Wires; Tubes
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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
- C08L2203/00—Applications
- C08L2203/18—Applications used for pipes
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- Polymers & Plastics (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Graft Or Block Polymers (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
The invention relates to a pressure-resistant tensile PE pipe and a production method thereof, wherein high-density polyethylene with medium molecular weight is used as a polymer matrix, small molecules are directly swelled and grafted or mixed monomers are copolymerized under the action of an initiator, the monomers are one or more of ethyl methacrylate, 4-isopropyl phenylacetic acid, isopropyl methacrylate and 1, 4-diacetoxy butane, an auxiliary agent comprises one or more of an antioxidant, a light stabilizer and a valence-variable metal ion inhibitor to form a single-phase stable free radical, the PE pipe is extruded out of a machine head in a preplasticizing manner, hot galvanizing is used for promoting demoulding and presetting of the pipe, vacuum sizing and traction cutting are carried out after cooling and setting, the wear resistance and the machining performance of the PE pipe are ensured, the pressure-resistant tensile performance is improved, environmental stress cracking is avoided, and the PE pipe is suitable for various drainage and pollution discharge, mining and gas pipelines.
Description
Technical Field
The invention relates to a pressure-resistant tensile PE pipe and a production method thereof, belonging to the technical field of PE pipes.
Background
The PE pipe is a pipe processed and molded by polyethylene plastic, has the characteristics of excellent resistance to most of domestic and industrial chemicals, does not need to be subjected to anticorrosive treatment compared with a steel pipe, has the advantages of light weight and convenience in installation and movement, and can be gradually substituted and widely applied to various water, oil and gas pipeline conveying environments. When the PE pipe is used for water supply, mining and sewage discharge, because the pipe needs to bear the friction force of a carried fluid to ensure the service life, the nonpolar thermoplastic resin high-density polyethylene with large molecular weight, high crystallinity, low melt viscosity, good fluidity and easy processing is usually selected, but the high-density polyethylene resin has low tensile strength and poor pressure resistance, so that the toughness and the rigidity of the PE pipe are poor, the dimensional stability is poor during molding and processing, the size connection and installation of the end part of the pipe are difficult to cause, the pipe is cracked by mechanical or chemical stress, the durability is reduced, and the use requirement is difficult to meet.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a pressure-resistant tensile PE pipe and a production method thereof.
The invention is realized by the following technical scheme:
the pressure-resistant tensile PE pipe comprises the following raw materials in parts by mass:
the number average molecular weight of the high-density polyethylene is 10-20 ten thousand, the monomer is one or more of ethyl methacrylate, 4-isopropylphenylacetic acid, isopropyl methacrylate and 1, 4-diacetoxybutane, and the initiator is one or two of dicumyl peroxide and dibenzoyl peroxide according to the mass ratio of 2: 1; and (4) galvanizing the surface of the PE pipe.
The auxiliary agent comprises one or more of an antioxidant, a light stabilizer and a variable valence metal ion inhibitor, wherein the antioxidant BTH, the antioxidant DSTDP and the antioxidant 168 are composed according to the mass ratio of 3:1:1, the light stabilizer is light stabilizer 622 or light stabilizer 770, and the variable valence metal ion inhibitor is oxalyldiamide or n-octylamide.
A method for producing a pressure-resistant tensile PE pipe comprises the following steps:
(1) introducing nitrogen into a reaction kettle for protection, and sequentially adding 50-65 parts of high-density polyethylene, 7-15 parts of monomer and 4-6 parts of initiator according to the parts by weight, wherein the number average molecular weight of the high-density polyethylene is 10-20 ten thousand, and the monomer is one or more of ethyl methacrylate, 4-isopropylphenylacetic acid, isopropyl methacrylate and 1, 4-diacetoxybutane for copolymerization;
in the copolymerization process, firstly heating to 60-80 ℃ at a speed of 10 ℃/min, then heating to 180-200 ℃ at a speed of 30 ℃/min, preserving heat for 3-4 h, then cooling to 40-55 ℃ at a speed of 20 ℃/min, stirring at a speed of 80-120 r/min, then washing with acetone, carrying out suction filtration, placing a filter cake in an acetone solution, carrying out reflux extraction for 1-2 h, and drying to obtain a graft copolymer;
(2) taking the graft copolymer, 6-10 parts of auxiliary agent and 1-2 parts of color master batch, drying, adding into a screw extruder, processing into a uniform melt, preplasticizing a compression extruder head, soaking the preplasticized product in hot zinc liquid for 60-80 s, delivering the hot zinc liquid into a mold for extrusion molding, carrying out vacuum sizing, cooling and shaping, and cutting after traction by a traction machine to obtain the PE pipe.
The invention has the beneficial effects that:
(1) the polyethylene with medium molecular weight and high density is adopted as a polymer matrix, the polyethylene is directly swelled under the action of an initiator, one or more of ethyl methacrylate, 4-isopropylphenylacetic acid, isopropyl methacrylate and 1, 4-diacetoxybutane are used as small molecules or mixed grafting monomers to form independent phase stable free radicals, the activation energy and half-life period of the initiator are proper, the brittleness is improved by utilizing grafting toughening, the extrusion molding is facilitated, the wear resistance and the machining performance of the PE pipe are ensured, the tensile and pressure resistance performance is improved, and the environmental stress cracking is avoided.
(2) The composite material has reasonable component proportion, is added with an auxiliary agent to stop the transmission and growth of free radical chains in the oxidation process, avoids intermolecular relaxation effect, can be combined with active salts of variable valence metals such as copper, manganese, iron and the like to form a complex, avoids the oxidation reaction and the thermal decomposition reaction of the oxygen-heat polyethylene graft copolymer, achieves the optimal balance state of comprehensive performance, and is suitable for various drainage and pollution discharge, mining and gas pipelines.
(3) Gradient temperature rise copolymerization reaction is carried out, the viscosity of a reaction system is reduced, monomers are easier to diffuse to a polyethylene molecular active space, sufficient grafting is guaranteed, products are preplasticized through a spiral extruding machine, hot galvanizing promotes demolding and presetting of the pipes, traction cutting is carried out after vacuum sizing and cooling setting, the whole pipe body is uniform, the surface is smooth, and the pressure resistance and tensile property are improved.
Drawings
FIG. 1 is a production flow chart of PE pipe.
Detailed Description
The following description of the embodiments of the present invention will be made with reference to the accompanying drawings.
Example 1
A method for producing a pressure-resistant tensile PE pipe comprises the following steps:
(1) introducing nitrogen into a reaction kettle for protection, and sequentially adding 62 parts of high-density polyethylene, 13 parts of monomer and 5 parts of initiator according to the mass parts, wherein the number average molecular weight of the high-density polyethylene is 10-20 ten thousand, and carrying out copolymerization reaction;
in the copolymerization process, firstly heating to 75 ℃ at a speed of 10 ℃/min, then heating to 190 ℃ at a speed of 30 ℃/min, preserving heat for 3h, then cooling to 45 ℃ at a speed of 20 ℃/min, and stirring at a speed of 90 r/min;
the monomer is 4-isopropylphenylacetic acid and 1, 4-diacetoxybutane according to the mass ratio of 2:3, and the initiator is dicumyl peroxide and dibenzoyl peroxide which are mixed according to the mass ratio of 2: 1;
washing with acetone, vacuum-filtering, placing the filter cake in acetone solution, reflux-extracting for 2h, and drying to obtain graft copolymer;
(2) taking a graft copolymer, 9 parts of an auxiliary agent and 2 parts of a color master batch, and drying, wherein the auxiliary agent comprises an antioxidant, a light stabilizer and a variable valence metal ion inhibitor, and the mass ratio of the antioxidant to the light stabilizer to the variable valence metal ion inhibitor is as follows: 3:1: 1;
the antioxidant BTH, the antioxidant DSTDP and the antioxidant 168 are composed according to the mass ratio of 3:1:1, the light stabilizer is a light stabilizer 770, and the valence-variable metal ion inhibitor is n-octylamide;
and then adding the mixture into a spiral extruding machine to be processed into uniform melt, preplasticizing and compressing an extruding machine head, soaking the preplasticized product in hot zinc liquid for 70s, wherein the temperature of the hot zinc liquid is 485 ℃, sending the hot zinc liquid into a die to be extruded and formed, then carrying out vacuum sizing, cooling and forming, and cutting the PE pipe after traction by a traction machine to obtain the PE pipe.
Example 2
A method for producing a pressure-resistant tensile PE pipe comprises the following steps:
(1) introducing nitrogen into a reaction kettle for protection, and sequentially adding 55 parts by mass of high-density polyethylene, 9 parts by mass of monomer and 6 parts by mass of initiator, wherein the number average molecular weight of the high-density polyethylene is 10-20 ten thousand, and carrying out copolymerization reaction;
in the copolymerization process, firstly heating to 80 ℃ at a speed of 10 ℃/min, then heating to 195 ℃ at a speed of 30 ℃/min, preserving heat for 3-4 h, then cooling to 40 ℃ at a speed of 20 ℃/min, and stirring at a speed of 1100 r/min;
the monomer is prepared by mixing ethyl methacrylate and 1, 4-diacetoxybutane according to the mass ratio of 5:3, and the initiator is dibenzoyl peroxide;
washing with acetone, vacuum-filtering, placing the filter cake in acetone solution, reflux-extracting for 2h, and drying to obtain graft copolymer;
(2) taking the graft copolymer, 8 parts of auxiliary agent and 2 parts of color master batch, and drying, wherein the auxiliary agent comprises an antioxidant and a light stabilizer, and the mass ratio of the antioxidant to the light stabilizer is 1: 2;
the antioxidant BTH, the antioxidant DSTDP and the antioxidant 168 are composed according to the mass ratio of 3:1:1, and the light stabilizer is light stabilizer 622 or light stabilizer 770;
and then adding the mixture into a spiral extruding machine to be processed into uniform melt, preplasticizing and compressing an extruding machine head, soaking the preplasticized product in hot zinc liquid for 65s, enabling the hot zinc liquid to have the temperature of 475 ℃, sending the hot zinc liquid into a die to be extruded and formed, then carrying out vacuum sizing, cooling and forming, and cutting the PE pipe after traction by a traction machine to obtain the PE pipe.
Example 3
A method for producing a pressure-resistant tensile PE pipe comprises the following steps:
(1) introducing nitrogen into a reaction kettle for protection, and sequentially adding 62 parts of high-density polyethylene, 13 parts of monomer and 5 parts of initiator according to the mass parts, wherein the number average molecular weight of the high-density polyethylene is 10-20 ten thousand, and carrying out copolymerization reaction;
in the copolymerization process, firstly heating to 80 ℃ at a speed of 10 ℃/min, then heating to 180 ℃ at a speed of 30 ℃/min, preserving heat for 4h, then cooling to 52 ℃ at a speed of 20 ℃/min, and stirring at a speed of 110 r/min;
the monomer is composed of ethyl methacrylate, 4-isopropylphenylacetic acid, isopropyl methacrylate and 1, 4-diacetoxybutane according to the mass ratio of 1: 1:3:2, wherein the initiator is dicumyl peroxide;
washing with acetone, vacuum-filtering, placing the filter cake in acetone solution, reflux-extracting for 1h, and drying to obtain graft copolymer;
(2) taking a graft copolymer, 8 parts of an auxiliary agent and 2 parts of a color master batch, and drying, wherein the auxiliary agent comprises an antioxidant and a variable valence metal ion inhibitor, and the mass ratio of the antioxidant to the variable valence metal ion inhibitor is 1: 3;
the antioxidant BTH, the antioxidant DSTDP and the antioxidant 168 are composed according to the mass ratio of 3:1:1, and the valence-variable metal ion inhibitor is n-octylamide;
and then adding the mixture into a spiral extruding machine to be processed into uniform melt, preplasticizing and compressing an extruding machine head, soaking the preplasticized product in hot zinc liquid for 75s, wherein the temperature of the hot zinc liquid is 480 ℃, sending the hot zinc liquid into a die to be extruded and formed, then carrying out vacuum sizing, cooling and forming, and cutting after traction by a traction machine to obtain the PE pipe.
The PE pipe prepared in the embodiments 1-3 is compared with the conventional pipe as a comparison example in terms of the properties, and the elongation at break (%) is tested according to the GB/T8804.3-2003 standard, the longitudinal shrinkage (%) is tested according to the GB/T6671-2001 standard, and the oxidation induction time (min) (250 ℃) is tested according to the GB/T17391-1998 standard, and the hydrostatic high-pressure failure time (h) at 80 ℃ is tested according to the GB/T18252-2000 standard, and the results are as follows:
(1) the method comprises the following steps of adopting high-density polyethylene with medium molecular weight as a polymer matrix, directly swelling the high-density polyethylene under the action of an initiator, adopting one or more of ethyl methacrylate, 4-isopropylphenylacetic acid, isopropyl methacrylate and 1, 4-diacetoxybutane as small molecules or mixed grafting monomers, wherein the mass ratio of the ethyl methacrylate to the 4-isopropylphenylacetic acid to the isopropyl methacrylate to the 1, 4-diacetoxybutane is (0-5): (0-5): (0-5): (0-5) forming independent phase stable free radicals, improving brittleness by utilizing grafting toughening, improving molecular weight of a graft copolymer, reducing crystallinity, reducing density and viscosity, obtaining proper melt strength, having low notch sensitivity, high shear strength and excellent scratch resistance, and facilitating extrusion molding;
as can be seen from the table, the method of the invention ensures the wear resistance and the machining performance of the PE pipe, improves the pressure resistance and the tensile strength, avoids environmental stress cracking, achieves the best balance state of comprehensive performance, and is suitable for various drainage and pollution discharge, mining and gas pipelines.
(2) Dicumyl peroxide and dibenzoyl peroxide as initiators are heated and decomposed into active free radicals, the activation energy and the half-life period are appropriate, the graft copolymerization of the initiating monomer and polyethylene can be promoted under low concentration, the molecular linear type is ensured, and the reaction rate is improved.
(3) The mass ratio of the antioxidant to the light stabilizer to the variable valence metal ion inhibitor is as follows: (0-3): (0-3): (0-3), adding an antioxidant to avoid oxidation reaction and thermal decomposition reaction of the oxygen-heat polyethylene graft copolymer, particularly degradation of the pipe embedded in soil, having good compatibility with the graft copolymer, using a sulfur-containing antioxidant DSTDP and a phosphorus-containing antioxidant 168 to assist a hindered phenol antioxidant BTH, stopping transmission and growth of a free radical chain in an oxidation process, avoiding an intermolecular relaxation effect, and improving the oxidation resistance and the aging resistance.
(4) The molecular formula of the hindered amine light stabilizer 622 is C15H29NO6, the molecular formula of the hindered amine light stabilizer 770 is C28H50N2O4, and the hindered amine light stabilizer can strongly absorb sensitive ultraviolet light of the polymer and can convert energy into harmless heat energy to be discharged, so that the interior of the polyethylene graft copolymer is protected.
(5) The ethanediamide or n-octylamide can be combined with active salts of variable valence metals such as copper, manganese, iron and the like to form a complex, so that the polyethylene graft copolymer is prevented from being oxidized due to the catalytic oxidation of active substances by metal ions.
(6) The preparation method has reasonable component proportion, so that when high-density polyethylene with medium molecular weight of 10-20 ten thousand is subjected to graft copolymerization, the contact between a macromolecular main chain and a monomer is increased, and meanwhile, the phenomenon that the high-density polyethylene macromolecular free radical coupling crosslinking is caused due to overlarge viscosity of a reaction system of the high-density polyethylene and the monomer is avoided, and the grafting rate is improved;
(7) the reasonable gradient temperature rise copolymerization reaction is adopted, so that the high-density polyethylene molecular chain is unwound, the viscosity of a reaction system is reduced, the activity of free radicals and monomers is increased, the monomers are more easily diffused to the activity space of the polyethylene molecules, the full grafting is ensured, the thermal decomposition of a graft copolymer caused by overlong reaction time is avoided, and the high grafting rate is ensured.
(8) The adoption is through hot dip galvanizing of spiral extruding machine preplasticizing product, and reentrant mould is tentatively stereotyped, and the even on-stick mould of ejection of compact when extruding can make the body whole even, makes the surface more smooth to a certain extent, improves withstand voltage tensile strength.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are also included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. The pressure-resistant tensile PE pipe is characterized by comprising the following raw materials in percentage by mass:
the monomer is one or more of ethyl methacrylate, 4-isopropylphenylacetic acid, isopropyl methacrylate and 1, 4-diacetoxybutane.
2. A pressure-resistant tensile PE pipe material according to claim 1, wherein the number-average molecular weight of the high-density polyethylene is 10 to 20 ten thousand.
3. The pressure-resistant and tensile PE pipe material as claimed in claim 1, wherein the initiator is one or a mixture of dicumyl peroxide and dibenzoyl peroxide in a mass ratio of 2: 1.
4. A pressure and tensile PE pipe as claimed in claim 1, characterized in that the auxiliary agents comprise one or more of antioxidants, light stabilizers, inhibitors of valence metal ions.
5. The pressure-resistant tensile PE pipe material as claimed in claim 4, wherein the antioxidant BTH, the antioxidant DSTDP and the antioxidant 168 are in a mass ratio of 3:1:1, and the light stabilizer is light stabilizer 622 or light stabilizer 770.
6. The pressure-resistant and tensile PE pipe material as claimed in claim 4, wherein the valence-variable metal ion inhibitor is oxalyldiamide or n-octylamide.
7. The PE pipe material with pressure resistance and tensile strength as claimed in any one of claims 1 to 6, wherein the surface of the PE pipe material is galvanized.
8. A production method of a pressure-resistant tensile PE pipe is characterized by comprising the following steps:
(1) introducing nitrogen into a reaction kettle for protection, sequentially adding 50-65 parts of high-density polyethylene, 7-15 parts of monomer and 4-6 parts of initiator according to the mass parts, wherein the number average molecular weight of the high-density polyethylene is 10-20 ten thousand, the monomer is one or more of ethyl methacrylate, 4-isopropylphenylacetic acid, isopropyl methacrylate and 1, 4-diacetoxybutane, carrying out copolymerization reaction, washing with acetone for suction filtration, placing a filter cake into an acetone solution for reflux extraction for 1-2 h, and drying to obtain a graft copolymer;
(2) taking the graft copolymer, 6-10 parts of auxiliary agent and 1-2 parts of color master batch, drying, adding into a screw extruder, processing into uniform melt, preplasticizing, compressing an extruder head, sending into a die for extrusion forming, then carrying out vacuum sizing, cooling and shaping, and cutting after traction by a traction machine to obtain the PE pipe.
9. The production method of the pressure-resistant tensile PE pipe material as claimed in claim 8, wherein in the copolymerization process in the step (1), the temperature is raised to 60-80 ℃ at a speed of 10 ℃/min, then raised to 180-200 ℃ at a speed of 30 ℃/min, the temperature is kept for 3-4 h, then the temperature is lowered to 40-55 ℃ at a speed of 20 ℃/min, and the stirring speed is 80-120 r/min.
10. The method for producing the PE pipe material with pressure resistance and tensile strength as claimed in claim 8 or 9, wherein the preplasticized product in the step (2) is soaked in hot zinc liquid for 60-80 s before being fed into the mold, and the temperature of the hot zinc liquid is 470-490 ℃.
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| CN201910957150.4A CN110591271A (en) | 2019-10-10 | 2019-10-10 | Pressure-resistant tensile PE pipe and production method thereof |
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| CN201910957150.4A CN110591271A (en) | 2019-10-10 | 2019-10-10 | Pressure-resistant tensile PE pipe and production method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112963632A (en) * | 2021-03-11 | 2021-06-15 | 四川泰鑫实业发展有限责任公司 | Flexible composite pipe and production method and production device thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102702436A (en) * | 2012-06-11 | 2012-10-03 | 上海清远管业科技有限公司 | Material special for buried plastic drainage pipeline and preparation method thereof |
| CN103160006A (en) * | 2011-12-15 | 2013-06-19 | 中国石油天然气股份有限公司 | Polyethylene resin composition special for pipes |
| CN110229278A (en) * | 2019-06-26 | 2019-09-13 | 贵州省材料产业技术研究院 | Composite polyolefine material and preparation method thereof and water supply and sewerage pipeline |
-
2019
- 2019-10-10 CN CN201910957150.4A patent/CN110591271A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103160006A (en) * | 2011-12-15 | 2013-06-19 | 中国石油天然气股份有限公司 | Polyethylene resin composition special for pipes |
| CN102702436A (en) * | 2012-06-11 | 2012-10-03 | 上海清远管业科技有限公司 | Material special for buried plastic drainage pipeline and preparation method thereof |
| CN110229278A (en) * | 2019-06-26 | 2019-09-13 | 贵州省材料产业技术研究院 | Composite polyolefine material and preparation method thereof and water supply and sewerage pipeline |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112963632A (en) * | 2021-03-11 | 2021-06-15 | 四川泰鑫实业发展有限责任公司 | Flexible composite pipe and production method and production device thereof |
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Application publication date: 20191220 |