CN108864594B - Antistatic PVC-U sewage discharge pipe for underground mine and preparation method thereof - Google Patents
Antistatic PVC-U sewage discharge pipe for underground mine and preparation method thereof Download PDFInfo
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- CN108864594B CN108864594B CN201810559051.6A CN201810559051A CN108864594B CN 108864594 B CN108864594 B CN 108864594B CN 201810559051 A CN201810559051 A CN 201810559051A CN 108864594 B CN108864594 B CN 108864594B
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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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- 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
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/001—Conductive additives
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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
- C08L2201/00—Properties
- C08L2201/04—Antistatic
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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
Abstract
The invention relates to the technical field of PVC (polyvinyl chloride) pipes and preparation thereof, in particular to an antistatic PVC-U sewage pipe for underground mines and a preparation method thereof, wherein the pipe is prepared by melting, plasticizing, melting, blending and rotationally extruding the following components in a conical double-screw extruder by weight: 100 parts of polyvinyl chloride; 5-30 parts of light calcium carbonate; 2-5 parts of polyol ester; 5-10 parts of conductive carbon black; 2.5-5 parts of a stabilizer; 1-1.5 parts of a lubricant; 0.5-2 parts of a processing aid; 2-6 parts of an anti-impact agent. According to the invention, the connecting points of the conductive network structure with the conductive function of the polyol ester and the conductive carbon black are adopted to play a conjugated effect, so that the conductive network is not damaged in the processing and shearing process of the material, the conductive effect of the conductive carbon black can be improved, the effective antistatic function can be ensured, and the mechanical property of the material is not lost; the pollution discharge pipe can be formed by a common basic processing technology, and has simple technology and low production cost.
Description
Technical Field
The invention relates to the technical field of PVC pipes and preparation thereof, in particular to an antistatic PVC-U sewage pipe for an underground mine and a preparation method thereof.
Background
The high insulation of the plastic has wide application space in the fields of industry, agriculture and high and new technology, but the high insulation also brings the problem of electrostatic harm to the plastic. Due to friction and stripping, static electricity accumulation is generated on plastic products, the static voltage can reach thousands of volts or even tens of thousands of volts sometimes, and light people cause electric shock, discharge, induced fire and explosion, especially underground mine underground gas explosion, and huge personal casualties and property loss can be caused.
With the wide application of plastic products in the industrial and civil fields, the problem of electrostatic hazard is more and more prominent, and various antistatic regulations and regulationsIt is also disclosed and perfected in succession, in which the antistatic standards of plastic pipes for coal mines are specified, the surface resistivity of which must not exceed 10 at the most9Omega. In the traditional PVC-U antistatic pipe, a large amount of antistatic agent is added in the formula for reducing the surface resistivity, so that various mechanical properties of the product are reduced, and the mechanical properties of the whole pipe are ensured; the PVC-U antistatic pipe is usually prepared by a three-layer co-extrusion compounding mode, PVC antistatic materials with lower mechanical properties are used for the inner surface layer and the outer surface layer, common PVC materials with higher mechanical properties are used for the core layer, the process and equipment are both complex, and the mechanical properties of the product are difficult to guarantee.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, provides the antistatic PVC-U sewage pipe for the underground mine and the preparation method thereof, ensures the effective antistatic function, does not lose the mechanical property of the material, and has simple process and low production cost.
In order to solve the technical problems, the invention adopts the technical scheme that:
the antistatic PVC-U pollution discharge pipe for the underground mine is prepared by melt blending and rotary extrusion of the following components in parts by weight:
according to the antistatic PVC-U sewage pipe for the underground mine, the connecting point of the conductive network structure with the conductive function of the polyol ester and the conductive carbon black is adopted to play a conjugated effect, so that the conductive network is not damaged in the material processing and shearing process, the conductive effect of the conductive carbon black can be improved, the effective antistatic function can be ensured, and the mechanical property of the material is not lost; the pollution discharge pipe can be formed by a common basic processing technology, and has simple technology and low production cost.
Preferably, the polyol ester is selected from one or more of the group consisting of glycol fatty acid ester, dipentaerythritol ester, glycol benzoate, polyhydric alcohol benzoate and triacetin. The connection point of the conductive network structure with the conductive function of the polyol ester and the conductive carbon black plays a conjugated effect, so that the conductive network is protected from being damaged in the processing and shearing process of the material.
Preferably, the conductive carbon black is columnar conductive carbon black.
More preferably, the columnar conductive carbon black has a conductivity of 2 Ω · m to 5 Ω · m, a diameter of 10nm to 100nm, and a length of 50nm to 100 nm.
The stabilizer, the lubricant, the processing aid and the impact resistant agent are commonly used in the PVC pipe processing process and comprise the following components in parts by weight:
preferably, the stabilizer can be one or more of di-n-octyl tin dilaurate, butyl tin mercaptide, zinc stearate, calcium zinc stabilizer and antimony organic thermal stabilizer; the lubricant can be one or more of paraffin, polyethylene wax, oxidized polyethylene wax, stearic acid and calcium stearate; the processing aid can be one or more of methyl methacrylate/acrylate copolymer, methyl methacrylate/styrene copolymer and acrylonitrile/styrene copolymer; the impact resistant agent can be one or more of a core-shell copolymer of methyl methacrylate grafted styrene-butadiene latex and an acrylate polymer.
The application of the stabilizer, the lubricant, the processing aid and the impact resistant agent in the PVC forming process can accelerate the PVC plasticizing process and improve the rheological property of the thermoplastic melt; on one hand, the mechanical property of the melt in a thermoelastic state can be improved, and the appearance quality of the product is improved.
The invention also provides a preparation method of the antistatic PVC-U pollution discharge pipe for the underground mine, which comprises the following steps:
s1, drying polyvinyl chloride, light calcium carbonate, polyol ester, conductive carbon black, a stabilizer, a lubricant, a processing aid and an impact resistant agent for later use;
s2, uniformly mixing the dried polyvinyl chloride, light calcium carbonate, polyol ester, conductive carbon black, a stabilizer, a lubricant, a processing aid and an impact resistant agent to obtain a mixed material;
s3, putting the mixed material obtained in the step S2 into a conical double-screw extruder, and performing melt extrusion;
s4, enabling the material melted and extruded by the conical double-screw extruder to flow into a die to be cooled and shaped into a tubular structure;
s5, the traction cutting machine pulls the tubular structure shaped in the step S4 and fixed-length cutting is carried out.
Preferably, the mixing step in step S2 includes:
s21, sequentially putting the dried polyvinyl chloride, light calcium carbonate, a stabilizer, a lubricant, a processing aid, an impact resistant agent, polyol ester and conductive carbon black into a high-speed mixing mill, wherein the temperature of the high-speed mixing mill is set to be 110-120 ℃;
s22, discharging the mixed material mixed by the high-speed mixing mill to a low-speed cold mixing cylinder for cold mixing, and discharging the mixed material when the temperature of the mixed material is reduced to 45-55 ℃.
More preferably, in step S21, the mixture is stirred at a low speed for 20-50S and then at a high speed for 5-8 min; the rotating speed of low-speed stirring is 20 r/min-30 r/min, and the rotating speed of high-speed stirring is 30 r/min-60 r/min.
The inventor finds that the mode of combining high-speed mixing and low-speed mixing and the mode of combining high-temperature mixing and low-temperature mixing can prevent polyvinyl chloride from decomposing under the high-temperature condition and endow the mixed material with better plasticizing performance, and the PVC-U pipe obtained by plasticizing and forming has better antistatic performance and mechanical performance because polyol ester and conductive carbon black are uniformly mixed in a PVC base material, and the connection point of a conductive network structure formed by the polyol ester and the conductive carbon black forms a conjugate effect, so that the conductive network can be ensured not to be damaged in the process of processing and shearing the material.
Preferably, the high-speed mixer has a capacity of 500L to 1000L, and the low-speed cold mixing cylinder has a capacity of 1000L to 3000L.
Preferably, in the step S3, the mixed material obtained in the step S2 is fed into a conical double-screw extruder, the temperature of each section of the double-screw extruder is controlled to be 165-185 ℃, the rotation speed of the screw is controlled to be 25-30 r/min, and the mixture is subjected to melt extrusion.
Preferably, the cooling temperature in the step S4 is 30 to 45 ℃, and the drawing speed of the drawing cutter in the step S5 is 1 to 3% faster than the extrusion speed.
Compared with the prior art, the invention has the beneficial effects that:
according to the invention, the connecting points of the conductive network structure with the conductive function of the polyol ester and the conductive carbon black are adopted to play a conjugated effect, so that the conductive network is not damaged in the processing and shearing process of the material, the conductive effect of the conductive carbon black can be improved, the effective antistatic function can be ensured, and the mechanical property of the material is not lost; the pollution discharge pipe can be formed by a common basic processing technology, and has simple technology and low production cost.
Detailed Description
The present invention will be explained in the following with reference to specific embodiments, however, the scope of the present invention is not limited to the following examples, and the description of the examples is only for assisting understanding of the method of the present invention and the core idea thereof. Any modification, equivalent replacement, and improvement made within the spirit and principle of this patent shall be included in the protection scope of the present claims.
Example 1
The antistatic PVC-U sewage pipe for the underground mine is prepared by melt blending and rotary extrusion of the following components in parts by weight: 100kg of polyvinyl chloride, 5kg of light calcium carbonate, 3kg of stabilizer, 1kg of lubricant, 1kg of processing aid, 4kg of impact resistant agent, 5kg of polyol ester and 10kg of columnar conductive carbon black.
Preparation: s1, drying polyvinyl chloride, light calcium carbonate, polyol ester, conductive carbon black, a stabilizer, a lubricant, a processing aid and an anti-dissolving agent in an electric heating constant-temperature blast drying oven at 100-110 ℃ for 3-4 h for later use; s2, sequentially putting the dried polyvinyl chloride, light calcium carbonate, a stabilizer, a lubricant, a processing aid, an impact resistant agent, polyol ester and conductive carbon black into a high-speed mixing mill and a low-speed cold mixing cylinder, wherein the temperature of the high-speed mixing mill is set to be 110-120 ℃, and the temperature of the low-speed cold mixing cylinder is set to be 45-55 ℃; in a high-speed mixing roll, firstly stirring at a low speed for 20s to 50s, and then stirring at a high speed for 5min to 8 min; the rotating speed of low-speed stirring is 20r/min to 30r/min, and the rotating speed of high-speed stirring is 30r/min to 60 r/min; s3, putting the mixed material obtained in the step S2 into a conical double-screw extruder, controlling the temperature of screws in each section of the double-screw extruder to be 165-185 ℃, controlling the rotating speed of the screws to be 25-30 r/min, and performing melt extrusion; s4, enabling the material melted and extruded by the conical double-screw extruder to flow into a die to be cooled and shaped into a tubular structure, wherein the cooling temperature is 30-45 ℃; s5, the traction cutting machine pulls the tubular structure shaped in the step S4 and cuts the tubular structure at a fixed length to obtain the finished product of the antistatic PVC-U sewage pipe for the underground mine, wherein the traction speed of the traction cutting machine is 1-3% faster than the extrusion speed.
Example 2
The antistatic PVC-U sewage pipe for the underground mine is prepared by melt blending and rotary extrusion of the following components in parts by weight: 100kg of polyvinyl chloride, 12kg of light calcium carbonate, 3.5kg of stabilizer, 1.1kg of lubricant, 1kg of processing aid, 4kg of impact resistant agent, 2kg of polyol ester and 10kg of columnar conductive carbon black.
Preparation: s1, drying polyvinyl chloride, light calcium carbonate, polyol ester, conductive carbon black, a stabilizer, a lubricant, a processing aid and an anti-dissolving agent in an electric heating constant-temperature blast drying oven at 100-110 ℃ for 3-4 h for later use; s2, sequentially putting the dried polyvinyl chloride, light calcium carbonate, a stabilizer, a lubricant, a processing aid, an impact resistant agent, polyol ester and conductive carbon black into a high-speed mixing mill and a low-speed cold mixing cylinder, wherein the temperature of the high-speed mixing mill is set to be 110-120 ℃, and the temperature of the low-speed cold mixing cylinder is set to be 45-55 ℃; in a high-speed mixing roll, firstly stirring at a low speed for 20s to 50s, and then stirring at a high speed for 5min to 8 min; the rotating speed of low-speed stirring is 20r/min to 30r/min, and the rotating speed of high-speed stirring is 30r/min to 60 r/min; s3, putting the mixed material obtained in the step S2 into a conical double-screw extruder, controlling the temperature of screws in each section of the double-screw extruder to be 165-185 ℃, controlling the rotating speed of the screws to be 25-30 r/min, and performing melt extrusion; s4, enabling the material melted and extruded by the conical double-screw extruder to flow into a die to be cooled and shaped into a tubular structure, wherein the cooling temperature is 30-45 ℃; s5, the traction cutting machine pulls the tubular structure shaped in the step S4 and cuts the tubular structure at a fixed length to obtain the finished product of the antistatic PVC-U sewage pipe for the underground mine, wherein the traction speed of the traction cutting machine is 1-3% faster than the extrusion speed.
Example 3
The antistatic PVC-U sewage pipe for the underground mine is prepared by melt blending and rotary extrusion of the following components in parts by weight: 100kg of polyvinyl chloride, 25kg of light calcium carbonate, 4kg of stabilizer, 1.3kg of lubricant, 1kg of processing aid, 4kg of impact resistant agent, 5kg of polyol ester and 5kg of columnar conductive carbon black.
Preparation: s1, drying polyvinyl chloride, light calcium carbonate, polyol ester, conductive carbon black, a stabilizer, a lubricant, a processing aid and an anti-dissolving agent in an electric heating constant-temperature blast drying oven at 100-110 ℃ for 3-4 h for later use; s2, sequentially putting the dried polyvinyl chloride, light calcium carbonate, a stabilizer, a lubricant, a processing aid, an impact resistant agent, polyol ester and conductive carbon black into a high-speed mixing mill and a low-speed cold mixing cylinder, wherein the temperature of the high-speed mixing mill is set to be 110-120 ℃, and the temperature of the low-speed cold mixing cylinder is set to be 45-55 ℃; in a high-speed mixing roll, firstly stirring at a low speed for 20s to 50s, and then stirring at a high speed for 5min to 8 min; the rotating speed of low-speed stirring is 20r/min to 30r/min, and the rotating speed of high-speed stirring is 30r/min to 60 r/min; s3, putting the mixed material obtained in the step S2 into a conical double-screw extruder, controlling the temperature of screws in each section of the double-screw extruder to be 165-185 ℃, controlling the rotating speed of the screws to be 25-30 r/min, and performing melt extrusion; s4, enabling the material melted and extruded by the conical double-screw extruder to flow into a die to be cooled and shaped into a tubular structure, wherein the cooling temperature is 30-45 ℃; s5, the traction cutting machine pulls the tubular structure shaped in the step S4 and cuts the tubular structure at a fixed length to obtain the finished product of the antistatic PVC-U sewage pipe for the underground mine, wherein the traction speed of the traction cutting machine is 1-3% faster than the extrusion speed.
Example 4
The antistatic PVC-U sewage pipe for the underground mine is prepared by melt blending and rotary extrusion of the following components in parts by weight: 100kg of polyvinyl chloride, 30kg of light calcium carbonate, 4.2kg of stabilizer, 1.5kg of lubricant, 1kg of processing aid, 4kg of impact resistant agent, 4kg of polyol ester and 8kg of columnar conductive carbon black.
Preparation: s1, drying polyvinyl chloride, light calcium carbonate, polyol ester, conductive carbon black, a stabilizer, a lubricant, a processing aid and an anti-dissolving agent in an electric heating constant-temperature blast drying oven at 100-110 ℃ for 3-4 h for later use; s2, sequentially putting the dried polyvinyl chloride, light calcium carbonate, a stabilizer, a lubricant, a processing aid, an impact resistant agent, polyol ester and conductive carbon black into a high-speed mixing mill and a low-speed cold mixing cylinder, wherein the temperature of the high-speed mixing mill is set to be 110-120 ℃, and the temperature of the low-speed cold mixing cylinder is set to be 45-55 ℃; in a high-speed mixing roll, firstly stirring at a low speed for 20s to 50s, and then stirring at a high speed for 5min to 8 min; the rotating speed of low-speed stirring is 20r/min to 30r/min, and the rotating speed of high-speed stirring is 30r/min to 60 r/min; s3, putting the mixed material obtained in the step S2 into a conical double-screw extruder, controlling the temperature of screws in each section of the double-screw extruder to be 165-185 ℃, controlling the rotating speed of the screws to be 25-30 r/min, and performing melt extrusion; s4, enabling the material melted and extruded by the conical double-screw extruder to flow into a die to be cooled and shaped into a tubular structure, wherein the cooling temperature is 30-45 ℃; s5, the traction cutting machine pulls the tubular structure shaped in the step S4 and cuts the tubular structure at a fixed length to obtain the finished product of the antistatic PVC-U sewage pipe for the underground mine, wherein the traction speed of the traction cutting machine is 1-3% faster than the extrusion speed.
Comparative example 1
The antistatic PVC-U sewage pipe for the underground mine is prepared by melt blending and rotary extrusion of the following components in parts by weight: 100kg of polyvinyl chloride, 30kg of light calcium carbonate, 4.2kg of stabilizer, 1.5kg of lubricant, 1kg of processing aid, 4kg of impact resistant agent and 5kg of polyol ester.
Preparation: s1, drying polyvinyl chloride, light calcium carbonate, polyol ester, conductive carbon black, a stabilizer, a lubricant, a processing aid and an anti-dissolving agent in an electric heating constant-temperature blast drying oven at 100-110 ℃ for 3-4 h for later use; s2, sequentially putting the dried polyvinyl chloride, light calcium carbonate, a stabilizer, a lubricant, a processing aid, an impact resistant agent, polyol ester and conductive carbon black into a high-speed mixing mill and a low-speed cold mixing cylinder, wherein the temperature of the high-speed mixing mill is set to be 110-120 ℃, and the temperature of the low-speed cold mixing cylinder is set to be 45-55 ℃; in a high-speed mixing roll, firstly stirring at a low speed for 20s to 50s, and then stirring at a high speed for 5min to 8 min; the rotating speed of low-speed stirring is 20r/min to 30r/min, and the rotating speed of high-speed stirring is 30r/min to 60 r/min; s3, putting the mixed material obtained in the step S2 into a conical double-screw extruder, controlling the temperature of screws in each section of the double-screw extruder to be 165-185 ℃, controlling the rotating speed of the screws to be 25-30 r/min, and performing melt extrusion; s4, enabling the material melted and extruded by the conical double-screw extruder to flow into a die to be cooled and shaped into a tubular structure, wherein the cooling temperature is 30-45 ℃; s5, the traction cutting machine pulls the tubular structure shaped in the step S4 and cuts the tubular structure at a fixed length to obtain the finished product of the antistatic PVC-U sewage pipe for the underground mine, wherein the traction speed of the traction cutting machine is 1-3% faster than the extrusion speed.
Comparative example 2
The antistatic PVC-U sewage pipe for the underground mine is prepared by melt blending and rotary extrusion of the following components in parts by weight: 100kg of polyvinyl chloride, 30kg of light calcium carbonate, 4.2kg of stabilizer, 1.5kg of lubricant, 1kg of processing aid, 4kg of impact resistant agent and 8kg of columnar conductive carbon black.
Preparation: s1, drying polyvinyl chloride, light calcium carbonate, polyol ester, conductive carbon black, a stabilizer, a lubricant, a processing aid and an anti-dissolving agent in an electric heating constant-temperature blast drying oven at 100-110 ℃ for 3-4 h for later use; s2, sequentially putting the dried polyvinyl chloride, light calcium carbonate, a stabilizer, a lubricant, a processing aid, an impact resistant agent, polyol ester and conductive carbon black into a high-speed mixing mill and a low-speed cold mixing cylinder, wherein the temperature of the high-speed mixing mill is set to be 110-120 ℃, and the temperature of the low-speed cold mixing cylinder is set to be 45-55 ℃; in a high-speed mixing roll, firstly stirring at a low speed for 20s to 50s, and then stirring at a high speed for 5min to 8 min; the rotating speed of low-speed stirring is 20r/min to 30r/min, and the rotating speed of high-speed stirring is 30r/min to 60 r/min; s3, putting the mixed material obtained in the step S2 into a conical double-screw extruder, controlling the temperature of screws in each section of the double-screw extruder to be 165-185 ℃, controlling the rotating speed of the screws to be 25-30 r/min, and performing melt extrusion; s4, enabling the material melted and extruded by the conical double-screw extruder to flow into a die to be cooled and shaped into a tubular structure, wherein the cooling temperature is 30-45 ℃; s5, the traction cutting machine pulls the tubular structure shaped in the step S4 and cuts the tubular structure at a fixed length to obtain the finished product of the antistatic PVC-U sewage pipe for the underground mine, wherein the traction speed of the traction cutting machine is 1-3% faster than the extrusion speed.
The mixed materials obtained in the examples 1-4 and the comparative examples 1-2 are placed in an electrothermal constant-temperature air blowing drying oven at 100-110 ℃ to be fully dried, and then formed into a standard mechanical property test and thermal deformation temperature test sample strip, and the test is carried out according to the ASTM standard.
TABLE 1 results of performance test of examples and comparative examples
As can be seen from the performance test results of the examples and comparative examples in Table 1, when the conductive carbon black is used alone as the antistatic agent, the surface resistance of the obtained sample is lower than the requirement of the technical index, but the mechanical properties such as tensile strength, longitudinal shrinkage and the like do not meet the requirement of the technical index; when polyol ester is used alone as an antistatic agent, the mechanical properties of the obtained sample are improved, but the surface resistance is slightly deviated; and when the connecting points of the conductive network structure with the conductive function of the polyol ester and the conductive carbon black are adopted, the conjugated effect is achieved, the conductive network is guaranteed not to be damaged in the processing and shearing process of the material, the effective antistatic function is guaranteed, and the mechanical property of the material is not lost.
Claims (10)
1. An antistatic PVC-U pollution discharge pipe for underground mines is characterized by being prepared by melt blending and rotary extrusion of the following components in parts by weight:
2. the antistatic PVC-U blowdown pipe material for underground mine according to claim 1, wherein the polyol ester is selected from one or more of glycol fatty acid ester, dipentaerythritol ester, glycol benzoate, polydiol benzoate, and triacetin.
3. The antistatic PVC-U blowdown pipe material for underground mine according to claim 1, wherein the conductive carbon black is columnar conductive carbon black.
4. The antistatic PVC-U blowdown pipe material for the underground mine according to claim 3, wherein the columnar conductive carbon black has an electrical conductivity of 2 Ω -m to 5 Ω -m, a diameter of 10nm to 100nm, and a length of 50nm to 100 nm.
5. The method for preparing the antistatic PVC-U blowdown pipe material for the underground mine as claimed in any one of claims 1 to 4, comprising the steps of:
s1, drying polyvinyl chloride, light calcium carbonate, polyol ester, conductive carbon black, a stabilizer, a lubricant, a processing aid and an impact resistant agent for later use;
s2, uniformly mixing the dried polyvinyl chloride, light calcium carbonate, polyol ester, conductive carbon black, a stabilizer, a lubricant, a processing aid and an impact resistant agent to obtain a mixed material;
s3, putting the mixed material obtained in the step S2 into a conical double-screw extruder, and performing melt extrusion;
s4, enabling the material melted and extruded by the conical double-screw extruder to flow into a die to be cooled and shaped into a tubular structure;
s5, the traction cutting machine pulls the tubular structure shaped in the step S4 and fixed-length cutting is carried out.
6. The method for preparing the antistatic PVC-U blowdown pipe material for the underground mine according to claim 5, wherein the mixing step in the step S2 comprises:
s21, sequentially putting the dried polyvinyl chloride, light calcium carbonate, a stabilizer, a lubricant, a processing aid, an impact resistant agent, polyol ester and conductive carbon black into a high-speed mixing mill, wherein the temperature of the high-speed mixing mill is set to be 110-120 ℃;
s22, discharging the mixed material mixed by the high-speed mixing mill to a low-speed cold mixing cylinder for cold mixing, and discharging the mixed material when the temperature of the mixed material is reduced to 45-55 ℃.
7. The method for preparing the antistatic PVC-U blowdown pipe material for the underground mine according to the claim 6, wherein in the step S21, the mixture is stirred at a low speed for 20-50S and then at a high speed for 5-8 min; the rotating speed of low-speed stirring is 20 r/min-30 r/min, and the rotating speed of high-speed stirring is 30 r/min-60 r/min.
8. The method for preparing the antistatic PVC-U blowdown pipe material for the underground mine according to claim 6, wherein the capacity of the high-speed mixing mill is 500L-1000L, and the capacity of the low-speed cold mixing cylinder is 1000L-3000L.
9. The method for preparing the antistatic PVC-U blowdown pipe material for the underground mine according to the claim 5, wherein the step S3 is to put the mixed material of the step S2 into a conical double screw extruder, control the temperature of each section of the double screw extruder to be 165-185 ℃ and the rotation speed of the screw to be 25-30 r/min, and melt-extrude.
10. The method for preparing the antistatic PVC-U blowdown pipe material for the underground mine according to claim 5, wherein the cooling temperature in the step S4 is 30 ℃ to 45 ℃, and the traction speed of the traction cutter in the step S5 is 1% to 3% faster than the extrusion speed.
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| CN103205068B (en) * | 2013-01-27 | 2016-04-13 | 甘春丽 | A kind of Antistatic soaked-plastic product and preparation method thereof |
| CN103183863A (en) * | 2013-04-15 | 2013-07-03 | 杭州邦德市政塑管有限公司 | Antistatic PE (Polyethylene) material |
| CN104479244A (en) * | 2014-11-25 | 2015-04-01 | 新疆西部节水科技股份有限公司 | High-performance mining pipe and preparation method thereof |
| CN106380744A (en) * | 2016-10-12 | 2017-02-08 | 黄山东仁新材料股份有限公司 | Production method of anti-wear, anti-scratch and antistatic plastic decoration film |
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