Hard polyethylene pipe with high impact resistance

Abstract

The invention relates to a hard polyethylene pipe with high impact resistance, which solves the problem that the hard PVC pipe has low impact strength, has brittleness, and is easy to leak, permeate and crack. The technical scheme to solve the problem is that: the hard polyethylene pipe is prepared from the following components in part by weight: 220 to 280 parts of PVC, 6 to 10 parts of heat stabilizer, 0.7 to 1.3 parts of lubricant, 2.1 to 2.9 parts of titanium pigment, 10 to 20 parts of impact modifier, 2 to 4 parts of processing aid and 3.5 to 6.5 parts of calcium carbonate; and the hard polyethylene pipe is prepared by the following steps: firstly, evenly mixing the components to prepare a mixture; secondly, heating the mixture to between 105 and 145DEG C, and cooling the mixture to between 30 and 55DEG C; standing the cooled mixture at a normal temperature of between 18 and 25DEG C for 8 to 12h; extruding the mixture at a temperature of between 130 and 220DEG C with an extruder; and cooling at a temperature of between 10 and 22DEG C. The hard polyethylene pipe has good toughness and impact resistance, chemical resistance, and difficult leakage, seepage and crack, and is innovation on pipes.

Description

1. Technical field [0001] The invention relates to a pipe, especially a rigid polyvinyl chloride pipe with high impact resistance. 2. Background technology [0002] Since the country organized and promoted the application of chemical building materials in a planned way in the early 1980s, the production and application of rigid PVC pipes have developed by leaps and bounds. An important use of rigid PVC pipes is for the construction of water supply and drainage pipe networks. In terms of water network construction, rigid PVC pipes have the advantage of longer service life than PE pipes, and the theoretical long-term strength of PVC is also higher than that of PE (PVC≥25MPa, PE≥10MPa). However, compared with PE, PVC is slightly "brittle", and it is easy to be injured when it is impacted. Therefore, how to improve the impact resistance and overcome the "brittleness" is a technical problem that must be solved for PVC pipes. 3. Contents of the invention [0003] In view of t...

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Problems solved by technology

[0003] In view of the above situation, in order to overcome the defects of the prior art, the purpose of the present invention is to provide a rigid polyvinyl chloride pipe with high impact resistance, which can effectively solve the problem of low impact strength, brittleness, and easy occurrence of pipes in rigid PVC pipes. Water leakage, water seepage, and cracking problems, the technical solution to the problem is, by weight: 220-280 parts of PVC, 6-10 parts of heat stabilizer, 0.7-1.3 parts of lubricant, 2.1-2.9 parts of titanium dioxide, anti-corrosion 10-20 parts of impact modifier, 2-4 parts of processing aid and 3.5-6.5 parts of calcium carbonate. When preparing, first mix the above components evenly to obtain a mixture, heat the mixture to 105-145°C, and then Cool to 30-55°C, place the cooled mixture at room temperature 18-25°C for 8-12 hours, then use an extruder to extrude at a temperature of 130-220°C, and then extrude at 10-22°C Down cooling; said heat stabilizer is heat stabilizer tribasic lead sulfate, or heat stabilizer zinc stearate, or heat stabilizer barium stearate, or organotin stabilizer, or other types of stabilizer; The degree of polymerization of the PVC used is 1000-2000; the lubricant used is any one or two of the lubricant PE wax, the lubricant paraffin wax, and the lubricant stearic acid, or a mixture of the three; the impact modifier used is Impact modifier chlorinated polyethylene CPE, impact modifier MBS resin (terpolymer of methyl methacrylate (M), butadiene (B) and styrene (S)), impact modifier Modifier ethylene-vinyl acetate copolymer EVA, any one or two, or a mixture of three; the processing aid used is the processing aid ACR201 (a graft copolymer of methyl methacrylate and acrylate), Or processing aid ACR401 (copolymerization of four monomers of methyl methacrylate, ethyl acrylate, butyl acrylate and styrene), or processing aid AMS (oligomer of α-methyl styrene), the above substances are commercially available products

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