CN114381076A - PVMK corrugated pipe for drainage pipe and preparation method - Google Patents
PVMK corrugated pipe for drainage pipe and preparation method Download PDFInfo
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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
- C08L27/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers
- C08L27/02—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L27/04—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment containing chlorine atoms
- C08L27/06—Homopolymers or copolymers of vinyl chloride
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/022—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the choice of material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2023/00—Tubular articles
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
- C08K2003/265—Calcium, strontium or barium carbonate
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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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- Health & Medical Sciences (AREA)
- Mechanical Engineering (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
- Manufacture Of Macromolecular Shaped Articles (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
Abstract
The invention discloses a PVMK corrugated pipe for a drain pipe and a preparation method thereof, wherein the PVMK corrugated pipe comprises the following components in parts by mass: 78-82 parts of PVC resin, 1-5 parts of lubricant, 3-7 parts of stabilizer, 1-5 parts of ACR (acrylic rubber) additive and 45-55 parts of toughening and reinforcing additive particles; the toughening and reinforcing additive particle comprises the following components in parts by weight: 18-22 parts of PVC resin, 3-7 parts of stabilizer, 1-5 parts of lubricant, 1-8 parts of coupling agent, 10-20 parts of MBS auxiliary agent, 5-10 parts of ACR auxiliary agent and 0-20 parts of calcium carbonate. The invention provides a preparation method of PVMK corrugated pipe for a drain pipe, which adopts a two-step process, namely, a part of raw materials of the pipe are prepared by granulation in advance, and then prepared particles are added into the rest raw materials of the pipe to be mixed for the pipe extrusion production process; by the two-step method, the toughening and reinforcing additive particles are prepared in advance, so that the combination between the additive and the raw material can be improved, and the strength and the impact resistance of the pipe are greatly improved.
Description
Technical Field
The invention relates to the technical field of buried pipelines, in particular to an ultrahigh-strength PVMK corrugated pipe and a preparation method thereof.
Background
The plastic pipeline industry in China has been developed rapidly, the application range of the plastic pipeline is expanded continuously, and the field with the largest market potential is the field of buried drain pipes. The plastic pipeline uses the raw material base materials mainly comprising PVC, PE and PP, and the PVC pipeline always occupies the first place in the plastic pipes of nearly 2000 million tons in the world. Although the PVC pipeline is widely applied to the field of water supply and drainage, under the increasingly complex buried condition, the PVC pipe on the market has great defects in the aspects of strength and impact resistance, and the further improvement of the strength of the product is beneficial to the expansion of the application range of the product and the improvement of the safety of a pipeline system.
In view of this, the present application is specifically made.
Disclosure of Invention
The invention aims to solve the technical problem that the existing PVC pipeline has poor strength and impact resistance, and provides a novel PVMK corrugated pipe for a drain pipe and a preparation method thereof.
The invention is realized by the following technical scheme:
the PVMK corrugated pipe for the drainage pipe comprises the following components in parts by mass: 78-82 parts of PVC resin, 1-5 parts of lubricant, 3-7 parts of stabilizer, 1-5 parts of ACR (acrylic rubber) additive, 45-55 parts of toughening and reinforcing additive particles and a proper amount of pigment; the toughening and reinforcing additive particle comprises the following components in parts by weight: 18-22 parts of PVC resin, 3-7 parts of stabilizer, 1-5 parts of lubricant, 1-8 parts of coupling agent, 10-20 parts of MBS (methyl methacrylate-butadiene-styrene) auxiliary agent, 5-10 parts of ACR auxiliary agent, 0-20 parts of calcium carbonate and a proper amount of pigment.
The PVMK corrugated pipe for the drainage pipe comprises the following components in parts by mass: 80 parts of PVC resin, 3 parts of lubricant, 5 parts of stabilizer, 3 parts of ACR (acrylate copolymer) assistant, 50 parts of toughening and reinforcing assistant particles and 0.1 part of pigment; the toughening and reinforcing additive particle comprises the following components in parts by weight: 20 parts of PVC resin, 3 parts of stabilizer, 2 parts of lubricant, 5 parts of coupling agent, 10 parts of MBS auxiliary agent, 5 parts of ACR auxiliary agent, 5 parts of calcium carbonate and 0.1 part of pigment.
According to the corrugated pipe, the toughening and reinforcing additive particles prepared and granulated in advance are added into the PVC raw material to produce the pipe, so that the strength and the impact resistance of the pipe can be greatly improved.
A preparation method of PVMK corrugated pipe for a drain pipe comprises the following steps: 1) the raw materials are matched according to the weight ratio and then added into a high-speed mixer to be mixed to 120 ℃ under the condition of 1300r/min, and then the raw materials are put into a low-speed mixer to be mixed at a low speed and cooled to 50 ℃; 2) extruding and granulating the mixed materials through a granulator to prepare tablet-shaped toughening and reinforcing auxiliary agent particles; 3) grinding the prepared tablet-shaped toughening and reinforcing auxiliary agent particles into particles with the particle size of less than 1.7mm by using a grinding machine; 4) mixing PVC resin, a stabilizer, a lubricant, an ACR processing aid and a pigment according to a weight ratio, then mixing the mixture in a high-speed mixer to 120 ℃, and then mixing the mixture in a low-speed mixer at a low temperature to reduce the temperature to 50 ℃; 5) adding the mixed materials into a PVC double-screw extruder for extrusion production; 6) adding the prepared toughening and reinforcing additive particles into the side surface of the double-screw extruder through side feeding equipment, wherein the adding position corresponds to three zones of a host screw when the toughening and reinforcing additive particles are added through side feeding; 7) and 4) mixing the materials prepared in the step 4) and the toughening and reinforcing auxiliary agent particles in three zones and four zones of a double-screw extruder, and then extruding and molding the mixture through a pipe die to finally prepare the ultrahigh-strength corrugated pipe.
Furthermore, a cooling device is arranged in the pulverizer, so that the problems of color change, decomposition or agglomeration caused by heating of toughening and reinforcing auxiliary agent particles due to temperature rise after the pulverizer works can be avoided.
Firstly, the pipe preparation method adopts a two-step process, namely, a part of raw materials of the pipe are granulated in advance to prepare the pipe, and then the prepared particles are added into the rest raw materials of the pipe to be mixed for the pipe extrusion production process; the toughening and reinforcing additive particles are prepared in advance through the two-step method, so that the combination between the toughening and reinforcing additive particles and raw materials can be improved, and the strength and the impact resistance of the pipe are greatly improved.
Secondly, after the toughening and reinforcing additive particles are prepared, the particle size of the toughening and reinforcing additive particles is improved by using a pulverizer, so that the dispersibility of the toughening and reinforcing additive particles in raw materials can be improved, and the condition that the product performance is not improved enough due to the phenomenon of uneven dispersion is avoided.
Finally, the prepared toughening and reinforcing additive particles are added into the side surface of the double-screw extruder through side feeding equipment, and the adding position corresponds to the three-zone position of the main machine screw when the toughening and reinforcing additive particles are added into the side surface feeding equipment, so that the condition that the molecular chain segment is damaged due to the fact that the toughening and reinforcing additive particles are added from the first zone of the screw and then pass through the shearing section of the screw can be avoided, and the product performance is ensured.
Compared with the prior art, the invention has the following advantages and beneficial effects:
1. according to the PVMK corrugated pipe for the drain pipe, the toughening and reinforcing additive particles prepared in advance are added into the PVC raw material for producing the pipe, so that the strength and the impact resistance of the pipe can be greatly improved;
2. the embodiment of the invention provides a preparation method of a PVMK corrugated pipe for a drain pipe, which adopts a two-step process, namely, a part of raw materials of the pipe are prepared by granulation in advance, and then prepared particles are added into the rest raw materials of the pipe to be mixed for the pipe extrusion production process; by the two-step method, toughening and reinforcing additive particles are prepared in advance, so that the combination between the additives and raw materials can be improved, and the strength and the impact resistance of the pipe are greatly improved;
3. according to the preparation method of the PVMK corrugated pipe for the drain pipe, the prepared toughening and reinforcing additive particles are added to the side surface of the double-screw extruder through the side feeding equipment, and when the toughening and reinforcing additive particles are added through the side feeding, the adding position corresponds to the three regions of the main machine screw, so that the condition that molecular chain segments are damaged due to the fact that the toughening and reinforcing additive particles are added from the first region of the screw and then are subjected to screw shearing and cutting is avoided, and the product performance is guaranteed.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to examples, and the exemplary embodiments and descriptions thereof are only used for explaining the present invention and are not used as limitations of the present invention.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. However, it will be apparent to one of ordinary skill in the art that: it is not necessary to employ these specific details to practice the present invention. In other instances, well-known materials or methods have not been described in detail in order to avoid obscuring the present invention.
Throughout the specification, reference to "one embodiment," "an embodiment," "one example," or "an example" means: the particular features, structures, or characteristics described in connection with the embodiment or example are included in at least one embodiment of the invention. Thus, the appearances of the phrases "one embodiment," "an embodiment," "one example" or "an example" in various places throughout this specification are not necessarily all referring to the same embodiment or example. Furthermore, the particular features, structures, or characteristics may be combined in any suitable combination and/or sub-combination in one or more embodiments or examples. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
In the description of the present invention, the matters related to the mass unit of the material components and the like are only provided for the convenience of describing the present invention and fully disclosing the selection of the material components of the present application, and do not indicate or imply that the material components referred to must be weighed out according to the unit, so that the scope of the present invention should not be construed as being limited.
Examples
The embodiment of the invention provides a preparation method of a PVMK corrugated pipe for a drain pipe, which comprises the following steps: 1) adding 20kg of PVC resin, 3kg of stabilizer, 2kg of lubricant, 5kg of coupling agent, 10kg of MBS auxiliary agent, 5kg of ACR auxiliary agent, 5kg of calcium carbonate and 0.1kg of pigment into a high-speed mixer, mixing to 120 ℃ under the condition of 1300r/min, and then lowering the raw materials into a low-speed mixer to mix at a low speed and cool to 50 ℃; 2) extruding and granulating the mixed materials through a granulator to prepare tablet-shaped toughening and reinforcing auxiliary agent particles; 3) grinding the prepared tablet-shaped toughening and reinforcing auxiliary agent particles into particles with the particle size of less than 1.7mm by using a grinding machine; 4) then 80kg of PVC resin, 3kg of lubricant, 5kg of stabilizer, 3kg of ACR auxiliary agent, 10kg of calcium carbonate and 0.1kg of pigment are taken and mixed in a high-speed mixer to 120 ℃, and then are mixed in a low-speed mixer at low temperature to be cooled to 50 ℃; 5) adding the mixed materials into a PVC double-screw extruder for extrusion production; 6) 50.1kg of prepared toughening and reinforcing additive particles are added into the side surface of the double-screw extruder through side feeding equipment, and the adding position corresponds to the position of three zones of a main machine screw when the toughening and reinforcing additive particles are added into the side surface feeding equipment; 7) and 4) mixing the materials prepared in the step 4) and the toughening and reinforcing auxiliary agent particles in three zones and four zones of a double-screw extruder, and then extruding and molding the mixture through a pipe die to finally prepare the ultrahigh-strength corrugated pipe.
Comparative example 1
A method for preparing a corrugated pipe comprises the following steps: taking 80kg of PVC resin, 3kg of lubricant, 5kg of stabilizer, 3kg of ACR (acrylate copolymer) additive, 10kg of calcium carbonate and 0.1kg of pigment, then taking 20kg of PVC resin, 3kg of stabilizer, 2kg of lubricant, 5kg of coupling agent, 10kg of MBS additive, 5kg of ACR additive, 5kg of calcium carbonate and 0.1kg of pigment, adding the components into a high-speed mixer together, mixing to 120 ℃, and then mixing at low temperature in a low-speed mixer to cool to 50 ℃; 5) and adding the mixed materials into a PVC double-screw extruder, and carrying out extrusion production to prepare the corrugated pipe.
The overall formula of the material in the comparative example 1 is the same as that of the material in the embodiment, and the difference is that the preparation method in the comparative example 1 adopts a one-step method, namely, the components of the toughening and reinforcing additive particles are directly added in a high-speed mixing stage without a granulation process of the toughening and reinforcing additive particles.
Comparative example 2
A method for preparing a corrugated pipe comprises the following steps: 1) adding 20kg of PVC resin, 3kg of stabilizer, 2kg of lubricant, 5kg of coupling agent, 10kg of MBS auxiliary agent, 5kg of ACR auxiliary agent, 5kg of calcium carbonate and 0.1kg of pigment into a high-speed mixer, mixing to 120 ℃ under the condition of 1300r/min, and then lowering the raw materials into a low-speed mixer to mix at a low speed and cool to 50 ℃; 2) extruding and granulating the mixed materials through a granulator to prepare tablet-shaped toughening and reinforcing auxiliary agent particles; 3) grinding the prepared tablet-shaped toughening and reinforcing auxiliary agent particles into particles with the particle size of less than 1.7mm by using a grinding machine; 4) then 80kg of PVC resin, 3kg of lubricant, 5kg of stabilizer, 3kg of ACR auxiliary agent, 10kg of calcium carbonate and 0.1kg of pigment are taken and mixed in a high-speed mixer to 120 ℃, and then are mixed in a low-speed mixer at low temperature to be cooled to 50 ℃; 5) and (3) simultaneously adding 50.1kg of the mixed material and 50.1kg of toughening and reinforcing auxiliary agent particles into a screw first area of a PVC double-screw extruder, and carrying out extrusion production to obtain the corrugated pipe.
The overall formula of the material of the comparative example 2 is the same as that of the material of the embodiment, and the preparation method also adopts a two-step method, and the difference is that the toughening and reinforcing particles and the main component of the pipe are added into the screw zone I at the same time in the comparative example 2 without side feeding.
Comparative example 3
A method for preparing a corrugated pipe comprises the following steps: 1) adding 20kg of PVC resin, 3kg of stabilizer, 2kg of lubricant, 5kg of coupling agent, 10kg of MBS auxiliary agent, 5kg of ACR auxiliary agent, 5kg of calcium carbonate and 0.1kg of pigment into a high-speed mixer, mixing to 120 ℃ under the condition of 1300r/min, and then lowering the raw materials into a low-speed mixer to mix at a low speed and cool to 50 ℃; 2) extruding and granulating the mixed materials through a granulator to prepare tablet-shaped toughening and reinforcing auxiliary agent particles; 3) then 80kg of PVC resin, 3kg of lubricant, 5kg of stabilizer, 3kg of ACR auxiliary agent, 10kg of calcium carbonate and 0.1kg of pigment are taken and mixed in a high-speed mixer to 120 ℃, and then are mixed in a low-speed mixer at low temperature to be cooled to 50 ℃; 4) adding the mixed materials into a PVC double-screw extruder for extrusion production; 5) 50.1kg of prepared toughening and reinforcing additive particles are added into the side surface of the double-screw extruder through side feeding equipment, and the adding position corresponds to the position of three zones of a main machine screw when the toughening and reinforcing additive particles are added into the side surface feeding equipment; 6) and 3) mixing the materials prepared in the step 3) and the toughening and reinforcing auxiliary agent particles in three zones and four zones of a double-screw extruder, and then extruding and molding the mixture through a pipe die to finally prepare the corrugated pipe.
The overall formula of the material of the comparative example 3 is the same as that of the material of the embodiment, and the preparation method also adopts a two-step method, except that the comparative example 3 adds the toughening and reinforcing additive particles which are not milled and have improved particle size in a three-zone screw.
Comparative example 4
A method for preparing a corrugated pipe comprises the following steps: taking 80kg of PVC resin, 2kg of lubricant, 5kg of stabilizer, 3kg of ACR (acrylate copolymer) additive, 10kg of calcium carbonate and 0.1kg of pigment, then taking 20kg of PVC resin, 1kg of stabilizer, 1kg of lubricant, 2kg of MBS additive, 2kg of ACR additive, 5kg of calcium carbonate and 0.1kg of pigment, adding the components into a high-speed mixer together, mixing to 120 ℃, and then mixing at low temperature in a low-speed mixer to cool to 50 ℃; 5) and adding the mixed materials into a PVC double-screw extruder, and carrying out extrusion production to prepare the corrugated pipe.
The following table 1 is obtained according to the above examples and the respective comparative example data.
Table 1 table comparing examples with comparative ingredients
Test results
The 200 gauge (SN8) corrugated pipes prepared in examples and comparative examples 1-4 were tested by ring stiffness and drop weight tests, and the results are shown in table 2 below.
As can be seen from Table 1, the corrugated pipe ring prepared by the embodiment of the invention has the highest rigidity, and meanwhile, in a drop hammer impact test, the corrugated pipe ring is not damaged after 120 times of drop hammer impact, so that the process preparation method of the invention achieves the purpose of toughening and reinforcing, and realizes the preparation of the high-strength PVMK corrugated pipe.
In the comparative example 1, various toughening and reinforcing additives are not subjected to granulation mixing treatment, and meanwhile, the additives without granulation are sheared in a shearing section of a screw second area, the ring stiffness of the corrugated pipe is only 8.9, which is obviously lower than that of the example, more than half of the corrugated pipe is damaged after 120 times of drop hammer impact, and the overall performance of the product is obviously reduced.
In the comparative example 2, the toughening and reinforcing assistant is granulated and mixed to obtain toughening and reinforcing assistant particles, and the assistant can be better combined with the raw materials, so that the ring stiffness is greatly improved compared with that of the comparative example 1, but because the toughening and reinforcing assistant particles can be sheared in a shearing section of a screw second zone, the product is not obviously improved in a drop hammer impact test, and the breakage rate is close to half in 120 drop hammer impacts.
In the comparative example 3, the toughening and reinforcing additive is subjected to granulation and mixing treatment to obtain toughening and reinforcing additive particles, and the additive is better combined with the raw materials, so that the ring stiffness is greatly improved compared with that of the comparative example 1, and meanwhile, the toughening and reinforcing additive particles are not sheared by a shearing section of a screw second zone, so that the ring stiffness is greatly improved compared with that of the comparative example 1 and that of the comparative example 2 in a drop hammer impact test, and the breakage is only about 30 percent, but the particle size of the toughening and reinforcing additive particles is not improved by a grinding machine in the comparative example, so that the phenomenon of uneven dispersion can occur in production, and the product performance is not improved enough compared with that of the example 1.
Comparative example 4 is a general PVC corrugated pipe, and the ring stiffness and drop weight impact test results were the worst under the same test conditions.
Table 2 results of performance testing of examples and comparative examples
| Formulation of | Examples | Comparative example 1 | Comparative example 2 | Comparative example 3 | Comparative example 4 |
| Ring stiffness (SN8) | 11.3 | 8.9 | 9.7 | 10.1 | 8.2 |
| Drop hammer impact test | 120 broken 0 | 120 broken 61 | 120 broken 53 | 120 broken 39 | 120 broken 94 |
The results show that the corrugated pipe preparation method adopts a two-step process, namely, a part of raw materials of the pipe are prepared by granulation in advance, and then the prepared particles are added into the rest raw materials of the pipe to be mixed for the pipe extrusion production process; by the two-step method, toughening and reinforcing additive particles are prepared in advance, so that the combination between the additives and raw materials can be improved, and the strength and the impact resistance of the pipe are greatly improved.
Meanwhile, the prepared toughening and reinforcing additive particles are added into the side surface of the double-screw extruder through side feeding equipment, and when the toughening and reinforcing additive particles are added into the side surface feeding equipment, the adding position corresponds to the position of three zones of the main machine screw, so that the condition that molecular chain segments are damaged due to the fact that the toughening and reinforcing additive particles are added from the first zone of the screw and pass through the shearing section of the screw can be avoided, and the product performance is ensured.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. The PVMK corrugated pipe for the drainage pipe is characterized by comprising the following components in parts by mass: 78-82 parts of PVC resin, 1-5 parts of lubricant, 3-7 parts of stabilizer, 1-5 parts of ACR (acrylic rubber) additive and 45-55 parts of toughening and reinforcing additive particles; the toughening and reinforcing additive particle comprises the following components in parts by weight: 18-22 parts of PVC resin, 3-7 parts of stabilizer, 1-5 parts of lubricant, 1-8 parts of coupling agent, 10-20 parts of MBS auxiliary agent, 5-10 parts of ACR auxiliary agent and 0-20 parts of calcium carbonate.
2. The PVMK corrugated pipe for drain pipe of claim 1, further comprising a pigment.
3. The PVMK corrugated pipe for the drain pipe according to claim 1, which is characterized by comprising the following components in parts by mass: 80 parts of PVC resin, 3 parts of lubricant, 5 parts of stabilizer, 3 parts of ACR (acrylate copolymer) assistant and 50 parts of toughening and reinforcing assistant particles; the toughening and reinforcing additive particle comprises the following components in parts by weight: 20 parts of PVC resin, 3 parts of stabilizer, 2 parts of lubricant, 5 parts of coupling agent, 10 parts of MBS auxiliary agent, 5 parts of ACR auxiliary agent and 5 parts of calcium carbonate.
4. A method for preparing PVMK corrugated pipe for drain pipe according to any of claims 1 to 3, comprising the steps of: 1) adding the raw materials into a mixer according to the proportion of the raw materials, mixing, and extruding and granulating the mixed materials through a granulator to prepare toughening and reinforcing auxiliary agent particles; 2) mixing PVC resin, a stabilizer, a lubricant and an ACR auxiliary agent according to a weight ratio, and adding the mixture into a mixer to mix; and adding the mixed materials into a PVC double-screw extruder for extrusion production, and simultaneously adding the prepared toughening and reinforcing auxiliary agent particles into the side surface of the double-screw extruder through side feeding equipment.
5. The method for preparing PVMK corrugated pipe for drain pipe according to claim 4, wherein in the step 2), when the toughening and reinforcing additive particles are added in the side feeding process, the adding position corresponds to the three-zone position of the main machine screw.
6. The method for preparing PVMK corrugated pipe for drain pipe according to claim 4, wherein the toughening and reinforcing assistant particles prepared in step 1) are in the shape of tablets.
7. The method for preparing PVMK corrugated pipe for drain pipe according to claim 6, wherein the tablet-shaped toughening and reinforcing assistant particles are ground into particles with the particle size of less than 1.7mm by using a grinder.
8. The method for manufacturing the PVMK corrugated pipe for the drain pipe according to claim 7, wherein a cooling device is arranged in the mill.
9. The preparation method of the PVMK corrugated pipe for the drain pipe as claimed in claim 4, wherein the raw materials are mixed specifically as follows: firstly, mixing the materials in a high-speed mixer to 120 ℃, and then, mixing the materials in a low-speed mixer at a low temperature and cooling the materials to 50 ℃.
10. The method for preparing PVMK corrugated pipe for a drain pipe according to claim 9, wherein the mixing speed of the high-speed mixer is 1300 r/min.
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