Method for producing wood plastic composite pipes and pipe fittings

Abstract

The invention relates to a method for producing wood plastic composite pipes and pipe fittings. The method comprises the following steps of breaking and crushing natural vegetable fibers into powder of 200 to 300 meshes, drying, adding an appropriate amount of a titanate coupling agent into the powder, carrying out wrapping coupling at a coupling temperature of 50 to 60 DEG C, adding 100 parts of a PVC resin, 20 parts of a filler calcium carbonate, 4 parts of a TK-238 composite lead stabilizer, 3 parts of 135A chlorinated polyethylene, 0.2 parts of 60# paraffin wax, 0.3 parts of stearic acid, 0.4 parts of lead stearate, 1 part of sodium bicarbonate, 0.8 parts of an azodicarbonamide foaming agent and 4 parts of an acrylate modifier into coupling products, mixing at a high speed of 2400 r / min at a mixing temperature of 100 to 110 DEG C, adding the mixture into a cold mixing machine, carrying out cold mixing at a cold mixing temperature of 40 to 50 DEG C, putting the cooled mixture obtained by cold mixing into a conical double-screw extruder or an injection molding machine, carrying out molding to obtain different types and specifications of the wood plastic composite pipes, pipe fittings or three-layer wood plastic silencing drain-pipes.

Description

technical field [0001] The invention adopts natural plant fiber and PVC resin to be compounded and modified to produce a wood-plastic pipe, a pipe fitting and a three-layer wood-plastic sound-reducing drainage pipe. It relates to a production process and method of wood-plastic composite pipes and pipe fittings, and belongs to the field of processing and manufacturing plastic pipes and pipe fittings. Background technique [0002] At present, the pipes, pipe fittings and power sheath pipes used in the construction industry, electric power, municipal pipe network, water supply and drainage, agricultural irrigation and other industries usually use PVC materials and calcium powder modified composite plastic pipes and pipe fittings. Although these products are used in a large amount and have good adaptability, they generally have problems such as poor strength, high specific weight, poor sound reduction effect, and serious production environment pollution. However, during the use...

AI Technical Summary

Problems solved by technology

Although these products are used in a large amount and have good adaptability, they generally have problems such as poor strength, high specific gravity, poor sound reduction effect, and serious production environment pollution.

However, during the use of the product, it is easy to cause corrosion and peeling off of the skin over time, and problems such as difficulty in connecting pipe fittings

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