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CN-119613885-B - Carrier roller body composition, carrier roller body and preparation method of carrier roller body

CN119613885BCN 119613885 BCN119613885 BCN 119613885BCN-119613885-B

Abstract

The invention relates to a carrier roller body composition, a carrier roller body and a preparation method thereof, wherein the composition comprises 100 parts by mass of polyvinyl chloride, 3-12 parts by mass of antistatic agent and other additives, the antistatic agent comprises conductive carbon black and multi-wall carbon nano tubes, the specific surface area of the conductive carbon black is more than or equal to 700m 2 /g, and the length-diameter ratio of the multi-wall carbon nano tubes is more than or equal to 1500. According to the carrier roller body composition provided by the embodiment of the invention, the conductive carbon black with a specific structure and the multi-wall carbon nano tube are used as the antistatic agent, so that the prepared carrier roller body still has better antistatic performance after being worn, and the antistatic performance is more durable.

Inventors

  • REN YUEQING
  • SUN XIAOJIE
  • DONG YANG
  • WU FUMEI
  • ZHANG ZHICHENG
  • JIANG MENG
  • LI YAFEI

Assignees

  • 国能科技成果转化(北京)有限公司

Dates

Publication Date
20260508
Application Date
20230901

Claims (10)

  1. 1. The preparation method of the carrier roller body comprises the steps of adopting a carrier roller body composition to prepare the carrier roller body, wherein the carrier roller body composition comprises 100 parts by mass of polyvinyl chloride, 3-12 parts by mass of antistatic agent, 10-20 parts by mass of toughening agent, 10-20 parts by mass of compatibilizer, 2-10 parts by mass of nano calcium carbonate and 3-10 parts by mass of stabilizer, the antistatic agent comprises conductive carbon black and multi-wall carbon nano tubes, the specific surface area of the conductive carbon black is more than or equal to 700m 2 /g, the length-diameter ratio of the multi-wall carbon nano tubes is more than or equal to 1500, the sum of the mass of the toughening agent and the compatibilizer is less than or equal to 30 parts by mass, the toughening agent comprises one or more of methyl methacrylate-butadiene-styrene copolymer and acrylic ester copolymer, the compatibilizer is chlorinated polyethylene, and the antistatic agent comprises m1 parts by mass of the conductive carbon black and m2 parts by mass of the multi-wall carbon nano tubes, and the ratio of m1+5m2 is more than or equal to 10; The preparation method comprises the following steps: providing a conductive masterbatch, and Blending and extruding the conductive master batch, the polyvinyl chloride, the toughening agent, the nano calcium carbonate and the stabilizer; wherein the conductive masterbatch comprises the antistatic agent and the compatibilizer.
  2. 2. The method according to claim 1, wherein the specific surface area of the conductive carbon black is 700 to 1200m 2 /g, the aspect ratio of the multiwall carbon nanotube is 1500 to 15000, and/or, The average particle diameter of the conductive carbon black is 20-50 nm, and/or, The particle diameter D50 of the multi-wall carbon nano tube is 15-30 um, and/or, The diameter of the multiwall carbon nanotube is 2-10 nm.
  3. 3. The method according to claim 1, wherein the specific surface area of the conductive carbon black is 850-1000 m 2 /g and/or, The length-diameter ratio of the multi-wall carbon nano tube is 6300-15000.
  4. 4. The preparation method of claim 1, wherein the polymerization degree of the polyvinyl chloride is 900-1100.
  5. 5. The preparation method of claim 1, wherein the polymerization degree of the polyvinyl chloride is 950-1050.
  6. 6. The method according to claim 1, wherein the sum of the mass of the toughening agent and the compatibilizer is 20 to 30 parts by mass, and/or, The average grain diameter of the nano calcium carbonate is 10-100 nm, and/or, The stabilizer is a metal soap stabilizer.
  7. 7. The method according to claim 6, wherein the sum of the mass of the toughening agent and the compatibilizer is 25 to 30 parts by mass, and/or, The average grain diameter of the nano calcium carbonate is 20-50 nm, and/or, The stabilizer is calcium-zinc stabilizer.
  8. 8. The method according to claim 1, wherein the conductive carbon black, the multi-walled carbon nanotube and the compatibilizer are blended and extruded to prepare the conductive masterbatch, and/or, And adding the polyvinyl chloride, the conductive master batch, the toughening agent, the nano calcium carbonate and the stabilizing agent into a high-speed mixer for mixing for 5-10 min, and extruding the obtained second mixture through a double-screw extruder.
  9. 9. The production method according to claim 8, wherein the number of revolutions of the high-speed mixer is 1500-2000 rpm, the aspect ratio of the twin-screw extruder is more than 30, and the temperature of the twin-screw extruder is 160-190 ℃.
  10. 10. A carrier roller body produced by the production method according to any one of claims 1 to 9.

Description

Carrier roller body composition, carrier roller body and preparation method of carrier roller body Technical Field The invention relates to a carrier roller body, in particular to a preparation method of a carrier roller body for underground mining transportation such as coal mines. Background In the field of underground mining transportation of coal mines and the like, the transportation of minerals by adopting a carrier roller-belt running system is an important transportation mode. The polymer product applied to the underground coal mine transportation field also needs to meet the requirements of flame retardance and static electricity resistance besides meeting different mechanical property indexes, and mainly because the mine carrier roller prepared by the polymer generates static electricity in the process of friction with a transportation belt, and has a large potential safety hazard in coexistence with coal bed gas in underground coal mine exploitation. Thus, the surface resistance of the downhole polymer article is 3X 10 8 Ω or less, according to MT113 standard. In addition, unlike other downhole polymer products, the idler rollers can run continuously with the conveyor belt due to the continuity of the coal transport. And in the running process, the carrier roller body and the conveying belt are rubbed with each other, so that the outermost side of the carrier roller body is slowly rubbed and lost. In view of this, it is required that the antistatic property of the polymer idler product to be run downhole is permanent and can be made long-term antistatic. Some existing carrier roller products adopt PVC antistatic agent, wherein the antistatic agent is a migration antistatic agent, and the antistatic agent migrates to the surface of a polymer in a certain time (several days) through small molecule migration, so that the surface resistance meets the mining requirement. Although enrichment of the surface antistatic property of the mobility can enable the carrier roller to reach the antistatic requirement, the surface of the carrier roller body is abraded due to friction with a belt in the transportation process, so that the content of the newly generated surface antistatic agent is low, the antistatic grade cannot reach the MT113 requirement, and the surface resistance is more than 3 multiplied by 10 8 Ω. Therefore, although the PVC carrier roller product can meet the antistatic requirement at the beginning of operation, the antistatic performance of the PVC carrier roller product is reduced after continuous operation causes friction abrasion, and a large potential safety hazard is easy to generate. Disclosure of Invention In order to overcome at least one defect of the prior art, in a first aspect, an embodiment of the invention provides a carrier roller body composition, which comprises 100 parts by mass of polyvinyl chloride, 3-12 parts by mass of an antistatic agent and other additives, wherein the antistatic agent comprises conductive carbon black and multi-wall carbon nano tubes, the specific surface area of the conductive carbon black is more than or equal to 700m 2/g, and the length-diameter ratio of the multi-wall carbon nano tubes is more than or equal to 1500. In a second aspect, an embodiment of the present invention provides a method for manufacturing a carrier roller body, including the steps of: providing a conductive masterbatch, and Blending and extruding the conductive master batch and polyvinyl chloride and other auxiliary agents; Wherein the conductive masterbatch comprises an antistatic agent and a compatibilizer, and the antistatic agent comprises conductive carbon black and multi-walled carbon nanotubes. In a third aspect, an embodiment of the present invention provides a idler roller made from the composition or the method described above. According to the carrier roller body composition provided by the embodiment of the invention, the conductive carbon black with a specific structure and the multi-wall carbon nano tube are used as the antistatic agent, so that the prepared carrier roller body still has better antistatic performance after being worn, and the antistatic performance is more durable. Detailed Description Exemplary embodiments that embody features and advantages of the present invention will be described in detail in the following description. It will be understood that the invention is capable of various modifications in various embodiments, all without departing from the scope of the invention, and that the description is intended to be illustrative in nature and not to be limiting. The invention provides a carrier roller body (or roller) composition, which comprises 100 parts by mass of polyvinyl chloride, 3-12 parts by mass of antistatic agent and other additives, wherein the antistatic agent comprises conductive carbon black and multi-wall carbon nano tubes, the specific surface area of the conductive carbon black is more than or equal to 700m 2/g, and the le