Double-plastic composite tube and production equipment thereof

Abstract

The invention discloses a double-plastic composite tube and production equipment thereof. The double-plastic composite tube comprises a polyethylene layer and a polyvinyl chloride layer, and the polyethylene layer is arranged outside the polyvinyl chloride layer. The double-plastic composite tube is excellent in corrosion resistance, long in service life, free of leakage, high in ring stiffness, good in toughness, lightweight, low in cost, capable of being made into large-diameter pipelines, convenient to transport, easy to mount and simple to connect, the polyethylene layer coats the polyvinyl chloride layer to form a composite plate strip which is made into the double-plastic composite tube through the double-plastic composite tube production equipment, and the production equipment is simple in structure, good in operability, high in production efficiency and low in cost.

Description

technical field [0001] The invention relates to a plastic drainage pipe, in particular to a double-plastic composite pipe and its manufacturing equipment. Background technique [0002] The status quo of municipal drainage pipes is: pure polyethylene (PE) pipes have excellent corrosion resistance, but the ring stiffness is not high. Vinyl (PVC) has low manufacturing costs and inexpensive equipment, but the pipes are brittle and prone to leakage, and have high rigidity. In order to improve the ring rigidity and reduce the cost, a series of problems will occur if steel belt reinforced polyethylene pipes are used, such as steel belt reinforced polyethylene (PE) spiral corrugated pipes, plastic steel winding pipes, double flat wall steel plastic drainage pipes, etc. For example, the steel belt is easy to corrode, the pipe will crack, and the waste pipe is difficult to recycle, etc. Contents of the invention [0003] The object of the present invention is to provide a double-p...

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Problems solved by technology

[0002] The current situation of municipal drainage pipes is: pure polyethylene (PE) pipes have excellent corrosion resistance, but the ring stiffness is not high. If the ring stiffness is increased, the pipe will be too heavy, the cost is high, the cost performance is not high, and the equipment is relatively expensive; Vinyl (PVC) has low manufacturing cost and inexpensive equipment, but the pipe is brittle and easy to leak, and has high rigidity

In order to improve the ring rigidity and reduce the cost, a series of problems will occur if steel belt reinforced polyethylene pipes are used, such as steel belt reinforced polyethylene (PE) spiral corrugated pipes, plastic steel winding pipes, double flat wall steel plastic drainage pipes, etc. For example, the steel belt is easy to corrode, the pipe will crack, and the waste pipe is difficult to recycle, etc.

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