A manufacturing process of double-wall corrugated pipe modified by using waste hdpe

Abstract

The invention discloses a double-wall corrugated pipe modified by waste HDPE (high-density polyethylene) and a manufacturing process of the double-wall corrugated pipe. The double-wall corrugated pipe comprises an inner layer and an outer layer, wherein the inner layer is prepared from 100 parts of HDPE regenerated crumbles, 20-30 parts of LLDPE (linear high-density polyethylene) raw material, 80-110 parts of enhanced functional talcum powder, 4-5 parts of carbon black, 10-11 parts of defoaming agent, 4.5-9 parts of silane coupling agent, 0.45-0.7 parts of maleic anhydride grafted polymer and 2-3 parts of antioxidant; the outer layer is prepared from 100 parts of HDPE regenerated crumbles, 18-19 parts of HDPE raw material, 45-70 parts of LLDPE regenerated blow molded material, 110-130 parts of enhanced function talcum powder, 9-15 parts of ethylate-vinyl acetate copolymer, 5-6 parts of carbon black, 10-11 parts of defoaming agent, 5-9 parts of silane coupling agent, 0.5-0.7 part of maleic anhydride grafted polymer and 1.5-2 parts of antioxidant. The corresponding manufacturing method comprises the following step: mixing and granulating according to certain sequence by controlling temperature condition to manufacture a special inner layer material and a special outer layer material of the HDPE double-wall corrugated pipe. According to the manufacturing process, materials for producing the corrugated pipe are conveniently taken and can be put into production without adding other additives. The obtained double-wall corrugated pipe integrates hardness and softness, the annular flexibility is improved, the using performance is promoted, and the manufacturing cost is also reduced by using the waste HDPE.

Description

technical field [0001] The invention relates to the field of manufacturing double-wall corrugated pipes, in particular to a manufacturing process for modifying double-wall corrugated pipes using waste HDPE. Background technique [0002] Double-wall corrugated pipe is a new type of pipe with a corrugated outer wall and a smooth inner wall. At present, it has been widely used as buried drainage pipes, ground cable pipes, etc., and has replaced traditional cast iron pipes, cement pipes, ordinary plastic pipes and winding corrugated pipes to a considerable extent. At present, HDPE double-wall corrugated pipes are more widely used because of their strong corrosion resistance, less fouling on the surface, low frictional resistance, excellent weather resistance, good processing performance and long service life. At present, HDPE double-wall corrugated pipes are mainly produced by adding appropriate amount of enhanced function masterbatch, carbon black masterbatch and defoamer to H...

AI Technical Summary

Problems solved by technology

But using HDPE new resin, the cost is high

Using HDPE recycled plastics to produce double-wall corrugated pipes can reduce costs, but at present, waste HDPE recycled plastics are used. Due to the limitations of components and manufacturing processes, the physical properties of the pipes obtained are poor, the pipes are relatively brittle, and the ring rigidity and ring flexibility are lacking. poor quality

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