Enhanced composite polyethylene double wall twined pipe and production method thereof

Abstract

The invention relates to the technical field of a pipeline, and specifically relates to an enhanced composite polyethylene double wall (an alternate name of a hollow wall) twined pipe and a production method thereof. The enhanced composite polyethylene double wall twined pipe is formed by enhanced composite polyethylene hollow rectangular pipes through spiral winding and bound by the bonded adhesives. Through change of a raw material formula and the preparation method of the composite polyethylene double wall twined pipe, the disadvantages of the current polyethylene double wall twined pipe can be overcome, toughness and rigidity of the polyethylene double wall twined pipe can be obviously increased, the high temperature resistance and chemical stability of the product are increased, the shrinkage rate of the double wall twined pipe is reduced, the size stability of the increased; the degree of crystallization of the polypropylene having an enhancing effect is higher than that of polyethylene, a nucleating agent capable of increasing degree of crystallization and the crystallization speed is added as a modification auxiliary agent, during practical production, the cooling moulding speed of the product is obviously increased, the production efficiency is greatly increased, and the production cost is saved.

Description

technical field [0001] The invention relates to the technical field of pipes, in particular to a reinforced composite polyethylene double-wall (also known as hollow wall) winding pipe and a preparation 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 of 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, and large flow capacity, and has been widely used in the construction of urban drainage systems in my country. [0003] Although PE pipes hav...

AI Technical Summary

Problems solved by technology

The polyethylene winding pipe in the prior art has good toughness and excellent low temperature resistance; however, it generally has disadvantages such as relatively poor rigidity, low heat resistance temperature, large shrinkage rate, poor dimensional stability, and poor light aging resistance, and the cost higher

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