Glass fiber enhanced high-density polyethylene (HDPE) double-walled winding pipe and manufacture method thereof

Abstract

The invention relates to a glass fiber enhanced high-density polyethylene (HDPE) double-walled winding pipe, which is formed by spirally winding a glass fiber enhanced HDPE plastic pipe and welding the glass fiber enhanced HDPE plastic pipe by plastic hot melt adhesives, wherein the glass fiber enhanced HDPE plastic pipe is a hollow rectangular glass fiber enhanced HDPE plastic pipe with the long glass fiber content being 5 percent to 40 percent by weight. A manufacture method of the glass fiber enhanced HDPE double-walled winding pipe comprises the following steps that HDPE mixed materials are prepared, modified long glass fiber is prepared, the HDPE mixed materials and the modified long glass fiber take reaction and are coextruded into a hollow square pipe, and the hollow square pipe is made into the glass fiber enhanced HDPE double-walled winding pipe through spiral winding and plastic hot melt adhesive welding. The glass fiber enhanced HDPE double-walled winding pipe has the advantages that the creep resistance, the modulus, the impact resistance, the scratch resistance, the slow crack expansion resistance, the environment stress cracking resistance and the high-temperature resistance are good, the whole body has sufficient sewing stretching intensity, and the integral performance of pipelines is effectively improved.

Description

technical field [0001] The invention relates to a pipe material, in particular to a glass fiber reinforced HDPE double-wall winding pipe and a manufacturing method thereof. Background technique [0002] The high-density polyethylene double-wall winding pipe is made of high-density polyethylene (HDPE) as the main raw material, and is wound in a hot-melt state by a special extrusion process. Its axial wall section is double-wall I-shaped, and the inner wall is dense and smooth. Hollow, the pipe itself is light in weight and high in strength. Due to its unique forming process, it can produce large-diameter pipes with a diameter up to 3000mm. As a new type of chemical building material, HDPE double-wall winding pipe has the advantages of light weight, corrosion resistance, smooth pipe wall, large flow capacity, good sealing performance, long service life, convenient transportation and installation, and fast construction speed. It is widely used in the construction of drainage ...

AI Technical Summary

Problems solved by technology

In order to reduce the creep coefficient of high polyethylene pipes, people consider using long glass fibers to modify polyethylene like engineering plastics, but polyethylene is a non-polar polymer with a fast crystallization speed, and the interface between it and glass fibers The compatibility is poor, and it is difficult to form an interaction force. After simply adding glass fibers, the performance of the material may even decline. content problem

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