Preparation process for high-strength PVC power pipe

Abstract

The invention discloses a preparation process for a high-strength PVC power pipe. The high-strength PVC power pipe is prepared from the following raw materials in parts by weight: 20-25 parts of polyvinyl chloride resin, 8-10 parts of a modified tricresyl phosphate flame retardant, 8-10 parts of a modified phenyl salicylate light stabilizer, 8-10 parts of an impact modifier, 5.5-7 parts of a lubricant, 3.5-5 parts of a heat stabilizer, and 6.5-8 parts of a plasticizer. In the preparation process of the high-strength PVC power pipe, the modified tricresyl phosphate flame retardant and the modified phenyl salicylate light stabilizer are prepared, so that the original flame retardancy of the PVC power pipe is further improved, and the effective time of the flame retardant substance is ensured; and the added light stabilizer ensures that in the construction process, the PVC power pipe does not undergo a photochemical reaction due to illumination to make the surface of the PVC power pipe turns yellow, color and brittle, and the service life of the PVC power pipe is further improved.

Description

Technical field [0001] The invention belongs to the field of preparation of PVC power pipes, and is specifically a preparation process of high-strength PVC power pipes. Background technique [0002] With the continuous advancement of science and technology, various electrical equipment has gradually become an indispensable part of people’s daily life, production, and construction. People’s demand for electricity is increasing, and cables have become the only way to transmit electricity. The cable is laid underground, and the cable is laid directly underground, which greatly reduces the service life of the cable due to various reasons. The emergence of PVC power pipes has changed this situation. PVC power pipes provide good protection for the cables. The service life of the cable is greatly improved; [0003] The PVC power pipes currently used in the market have good insulation, compression resistance, impact resistance, and installation performance, but the flame retardancy is gen...

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Problems solved by technology

[0003] At present, the PVC power pipes used in the market have good insulation, compression resistance, impact resistance and installation performance, but the flame retardancy is average. When the PVC power pipes burn, although they can play a certain flame retardant effect, However, it cannot be flame-retardant quickly when the flame is just burning, which may lead to large losses, and most of the flame retardants used are highly volatile. After a period of use, the flame retardancy of PVC power pipes decreases or even does not have flame retardancy. At the same time, during the cable laying construction process, the PVC power pipe will be exposed to sunlight for a long time, so the light stability has also become an essential feature of the PVC power pipe, but the current PVC power pipe has a general light stability and is not very good. have a protective effect;

[0004] Chinese invention patent CN102875932B discloses a preparation process for PVC power pipes. The raw materials include: 100 parts of polyvinyl chloride resin with a particle size of 0.1-0.2mm, 20-30 parts of calcium carbonate with a particle size of 300-700 mesh 6-10 parts of impact modifier ACR, 3-6 parts of composite lead salt stabilizer, 0.5-2 parts of lubricant oxidized polyethylene wax, 4-10 parts of nano-scale agent-free flame retardant; the invention has good rigidity, but The flame retardant is an inorganic flame retardant, and the flame retardant efficiency of the inorganic flame retardant is low, and the addition amount is large, the production cost is high, and it does not have light stability. When the PVC power pipe is exposed to sunlight during long-term construction, it will cause The photochemical reaction of PVC power pipe reduces the service life of PVC power pipe

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