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CN-115674791-B - CPVC cable protection tube and preparation method thereof

CN115674791BCN 115674791 BCN115674791 BCN 115674791BCN-115674791-B

Abstract

The invention relates to the technical field of cable protection pipes, and particularly discloses a CPVC cable protection pipe and a preparation method thereof, wherein the CPVC cable protection pipe comprises, by mass, 50-70 parts of CPVC resin, 30-45 parts of PVC resin, 15-20 parts of an anti-aging agent, 12-13 parts of a high temperature resistant agent, 9-10 parts of an impact resistant agent, 1-3 parts of a plastic reinforcing agent, 8-9 parts of a flame retardant, 3-4 parts of a lubricating agent and 2-5 parts of a plasticizing agent, the middle pressurizing layer is composed of the following raw materials, and by adopting an alternate reinforcing structure of the middle pressurizing layer, the whole stable supporting effect of the middle pressurizing layer after injection molding can be greatly improved, and meanwhile, the materials adopted by the middle pressurizing layer have better fluidity than the outer anti-aging layer and the inner wear layer, so that the materials of the middle pressurizing layer can be filled in various parts of a complex pressurizing layer mold under the influence of a pipeline in the injection molding process of the middle pressurizing layer in the production process, and good production effect is realized.

Inventors

  • WANG QIZHEN
  • JIANG XUEZHONG

Assignees

  • 扬州市鸿信线路器材有限公司

Dates

Publication Date
20260508
Application Date
20221025

Claims (6)

  1. 1. The CPVC cable protection tube comprises an outer anti-corrosion layer (1), a middle pressurizing layer (2) and an inner wear-resistant layer (3), and is characterized in that the outer anti-corrosion layer (1) is composed of, by mass, 50-70 parts of CPVC resin, 30-45 parts of PVC resin, 15-20 parts of an anti-aging agent, 12-13 parts of a high temperature resistant agent, 9-10 parts of an impact resistant agent, 1-3 parts of a plastic reinforcing agent, 8-9 parts of a flame retardant, 3-4 parts of a lubricant and 2-5 parts of a plasticizing agent; The middle pressurizing layer (2) is composed of, by mass, 45-50 parts of CPVC resin, 65-67 parts of PVC resin, 10-12 parts of anti-aging agent, 15-18 parts of high temperature resistant agent, 8-9 parts of impact resistant agent, 3-4 parts of plastic reinforcing agent, 1-2 parts of flame retardant, 1-2 parts of lubricant and 5-10 parts of plasticizer; The inner wear-resistant layer (3) is composed of the following raw materials, by mass, 50-70 parts of CPVC resin, 30-45 parts of PVC resin, 15-20 parts of anti-aging agent, 12-13 parts of high temperature resistant agent, 12-15 parts of impact resistant agent, 1-3 parts of plastic reinforcing agent, 8-9 parts of flame retardant, 3-4 parts of lubricant and 2-5 parts of plasticizer; The method comprises the following steps: Softening CPVC resin and PVC resin for 2 to 3 hours at the temperature of 110 ℃ and the air pressure of 1.5Mpa, then placing CPVC resin and PVC resin in corresponding proportions into three different containers, placing an anti-aging agent, a high temperature resistant agent, an impact resistant agent, a plastic reinforcing agent, a flame retardant, a lubricant and a plasticizer into the three different containers according to different proportions of the outer anti-corrosion layer (1), the middle pressurizing layer (2) and the inner wear-resistant layer (3), stirring and mixing the materials, and waiting for subsequent use; Melting and extruding the mixed materials of the outer anti-corrosion layer (1), the middle pressurizing layer (2) and the inner wear-resistant layer (3) through three single screw extruders, wherein each layer corresponds to one single screw extruder, injecting the mixed materials of the inner wear-resistant layer (3) into the screw extruder for granulation, placing the obtained raw material particles into a feeding machine, plasticizing and extruding the raw material particles into a die through a high temperature of a charging barrel and the die, cooling the raw material particles to 50-70 ℃, removing the die to obtain a blank of the inner wear-resistant layer (3), replacing the die of the middle pressurizing layer (2) fixed on the outer side, extruding the materials of the middle pressurizing layer (2) into the blank of the die and the inner wear-resistant layer (3) according to the steps, heating the die to 100 ℃, cooling the die to 60 ℃ after the temperature is raised to 100 ℃, replacing the outer die with the die of the outer anti-corrosion layer (1), heating the die to 90 ℃ and taking down the formed C cable protection tube through cooling water; The inner surface of the outer anti-corrosion layer (1) and the outer surface of the inner wear-resistant layer (3) are smooth surfaces, a fixing groove of the middle pressurizing layer (2) is formed in the inner side of the outer anti-corrosion layer (1), an outer fixing groove of the middle pressurizing layer (2) is formed in the outer surface of the inner wear-resistant layer (3), the middle pressurizing layer (2) comprises a supporting module (201), and a flow guiding module (202) is fixedly connected between the supporting modules (201); The impact resistant agent consists of acrylonitrile-butadiene-styrene copolymer (MBS) and Chlorinated Polyethylene (CPE) according to the mass ratio of 1:1.2.
  2. 2. A CPVC cable protection pipe according to claim 1 wherein the plastic reinforcing agent comprises calcium carbonate, clay and talc in a ratio of 1:1.5:0.8.
  3. 3. A CPVC cable protection pipe as in claim 1 wherein the plasticizer is phthalate and epoxy fatty acid methyl ester in a 1:3 ratio.
  4. 4. A CPVC cable protection pipe as in claim 1 wherein the lubricant is methyl methacrylate.
  5. 5. The CPVC cable protection tube as claimed in claim 1, wherein the flame retardant is aluminum hydroxide, and the preparation method comprises the steps of reacting sulfuric acid with aluminum powder or aluminum ash to generate aluminum sulfate, and then carrying out double decomposition reaction with ammonium bicarbonate to obtain the aluminum hydroxide.
  6. 6. A CPVC cable protection pipe as in claim 1 wherein the inner diameters of the dies used in the injection molding process of the outer anticorrosive layer (1), the middle pressurizing layer (2) and the inner wear-resistant layer (3) are the same, and are the inner diameters of the outer anticorrosive layer (1).

Description

CPVC cable protection tube and preparation method thereof Technical Field The invention relates to the technical field of cable protection pipes, in particular to a CPVC cable protection pipe and a preparation method thereof. Background The CPVC cable protection tube is widely used for urban street lamp cable laying in projects such as urban power grid construction and transformation or urban municipal transformation, plays a role in guiding and protecting, takes PVC-C resin with excellent heat resistance and insulating property as a main material, and CPVC products are recognized green and environment-friendly products, and the excellent physical and chemical properties of the CPVC products are becoming more and more important to the industry. The CPVC cable protection tube used at present generally adopts integrated design, and is directly cooled and formed after being extruded by a die, and the CPVC resin material has the characteristics of poor toughness and fragility in the use process of the protection tube due to the characteristics of the CPVC resin material, so that the protection tube is influenced to be used for a long time under high vibration and high-frequency impact, such as road bottom environment. Disclosure of Invention In order to overcome the defects in the prior art, the invention provides a CPVC cable protection tube and a preparation method thereof, which are used for solving the problems in the prior art. The CPVC cable protection tube comprises an outer anti-corrosion layer, a middle pressurizing layer and an inner wear-resistant layer, wherein the outer anti-corrosion layer is composed of, by mass, 50-70 parts of CPVC resin, 30-45 parts of PVC resin, 15-20 parts of an anti-aging agent, 12-13 parts of a high temperature resistant agent, 9-10 parts of an impact resistant agent, 1-3 parts of a plastic reinforcing agent, 8-9 parts of a flame retardant, 3-4 parts of a lubricant and 2-5 parts of a plasticizing agent; The middle pressurizing layer consists of the following raw materials, by mass, 45-50 parts of CPVC resin, 65-67 parts of PVC resin, 10-12 parts of anti-aging agent, 15-18 parts of high temperature resistant agent, 8-9 parts of impact resistant agent, 3-4 parts of plastic reinforcing agent, 1-2 parts of flame retardant, 1-2 parts of lubricant and 5-10 parts of plasticizer; the inner wear-resistant layer is composed of, by mass, 50-70 parts of CPVC resin, 30-45 parts of PVC resin, 15-20 parts of anti-aging agent, 12-13 parts of high temperature resistant agent, 12-15 parts of impact resistant agent, 1-3 parts of plastic reinforcing agent, 8-9 parts of flame retardant, 3-4 parts of lubricant and 2-5 parts of plasticizer. The method comprises the following steps: Softening CPVC resin and PVC resin for 2 to 3 hours at the temperature of 110 ℃ and the air pressure of 1.5Mpa, then placing CPVC resin and PVC resin in corresponding proportions into three different containers, placing an anti-aging agent, a high temperature resistant agent, an impact resistant agent, an insulation reinforcing agent, a flame retardant, a lubricant and a plasticizer into the three different containers according to different proportions of the outer anti-corrosion layer, the middle pressurizing layer and the inner wear-resistant layer, stirring and mixing the materials for subsequent use; Melting and extruding the mixed materials of the outer anti-corrosion layer, the middle pressurizing layer and the inner wear-resistant layer in the first step through three single screw extruders, wherein each layer corresponds to one single screw extruder, injecting the mixed materials of the inner wear-resistant layer into the screw extruders for granulation, placing the obtained raw material particles into a feeding machine, plasticizing and extruding the raw material particles into a mold at a high temperature through a charging barrel and a mold, cooling the raw material particles to 50-70 ℃, dismantling the mold to obtain a blank of the inner wear-resistant layer, replacing the mold of the middle pressurizing layer fixed on the outer side, extruding the materials of the middle pressurizing layer into the blank of the mold and the inner wear-resistant layer according to the steps, heating the mold to 100 ℃, cooling to 60 ℃ after the temperature is raised, replacing the outer mold with the mold of the outer anti-corrosion layer, extruding the outer mold into the materials of the outer anti-corrosion layer, heating to 90 ℃ after the completion, taking down the molded CPVC cable protection pipe, and cooling the molded CPVC cable protection pipe through cooling water; Further, the inner surface of the outer anti-corrosion layer and the outer surface of the inner wear-resistant layer are smooth surfaces, a fixing groove of the middle pressurizing layer is formed in the inner side of the outer anti-corrosion layer, an outer fixing groove is formed in the outer surface of the inner wear-resistant layer, the outer anti-c