A polyvinyl chloride foam tube

Abstract

The invention provides a polyvinyl chloride foam tube. The polyvinyl chloride foam tube is composed of an inner solid wall layer, an outer solid wall layer and a middle foam core layer. The inner solid wall layer and the outer solid wall layer are composed of, by mass, 25-35 parts of compact polyvinyl chloride resin, 80-90 parts of loose polyvinyl chloride resin, 2-4 parts of stabilizers, 10-30 parts of processing agents A and 11-15 parts of fillers. The middle foam core layer is composed of, by mass, 1-5 parts of compact polyvinyl chloride resin, 80-100 parts of loose polyvinyl chloride resin, 2-4 parts of stabilizers, 4-6 parts of processing agents B and 5-15 parts of fillers. The polyvinyl chloride foam tube provided by the invention is resistant to corrosion, light, resistant to shock and is capable of preserving heat, the annular rigidity is about eight times higher than that of common UPVC tubes, raw materials can be saved by 25% or more compared with solid wall tubes, the noise reduction function is obvious, and noise can be reduced by 2-3 db compared with the solid wall tubes.

Description

technical field [0001] The invention relates to a pipe material, in particular to a polyvinyl chloride foam pipe. Background technique [0002] Hard plastic pipes in traditional crafts are mainly used for water supply and drainage. But because the inner wall is smooth, it is easy to produce a loud running sound when pouring water. [0003] In the traditional process, UPVC is often used, which is an amorphous thermoplastic resin made by polymerization of vinyl chloride monomer plus certain additives (such as stabilizers, lubricants, fillers, etc.). In addition to using additives, it also adopts the method of blending and modifying with other resins, so that it has obvious practical value. These resins include CPVC, PE, ABS, EVA, MBS, etc. The melt viscosity of UPVC is high and the fluidity is poor. Even if the injection pressure and melt temperature are increased, the fluidity does not change much. [0004] In addition, the molding temperature of the resin is very close t...

AI Technical Summary

Problems solved by technology

[0004] In addition, the molding temperature of the resin is very close to the thermal decomposition temperature, and the temperature range that can be molded is very narrow, making it a difficult material to mold.

[0005] In addition, the existing pipes basically have weak corrosion resistance, heavy weight, poor insulation and shockproof effects, and high manufacturing costs, which are not suitable for modern industrial production needs.

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