Polypropylene enhanced double-wall corrugated pipe

Abstract

The invention discloses a polypropylene enhanced double-wall corrugated pipe, and relates to the field of polypropylene corrugated pipes. The polypropylene enhanced double-wall corrugated pipe manly comprises a straight pipe layer and a corrugated outer pipe layer, wherein the straight pipe layer is provided with a smooth inner wall; the corrugated outer pipe layer is of an annular structure; the corrugated outer pipe layer is externally sheathed on the outer wall of the straight pipe layer; the formula of the straight pipe layer and the corrugated outer pipe layer is prepared from basic material and auxiliary materials, the basic material is prepared from polypropylene component, and the auxiliary materials is prepared from active calcium carbonate powder, fiber and a lubricating stabilizer, so as to realize the function of high strength of the corrugated pipe body.

Description

technical field [0001] The invention relates to a polypropylene reinforced double-wall corrugated pipe, and mainly relates to the field of polypropylene corrugated pipes. Background technique [0002] Drainage double-wall corrugated pipe is a new type of pipe with a ring-shaped outer wall and a smooth inner wall. The existing drainage double-wall corrugated pipe is mainly made of polyvinyl chloride (PVC), polyethylene (PE) or polypropylene (PP). A certain amount of synthetic masterbatches are mixed and then compounded by extrusion. Respectively called polyvinyl chloride, polyethylene, polypropylene reinforced double-wall bellows. Double-wall corrugated pipes are used as rainwater and sewage pipelines, and their performance requirements must be smooth on the inner wall to prevent silt deposition, resistance to certain chemical corrosion, high external force bearing capacity (ie ring stiffness) impact capability. Among the existing corrugated pipes, the PVC double-walled co...

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Problems solved by technology

Among the existing corrugated pipes, the PVC double-walled corrugated pipe has poor corrosion resistance, poor impact resistance, poor thermal stability, difficult production control, and large environmental pollution during the production process; the polyethylene double-walled corrugated pipe has good toughness, but its resistance The tensile strength is poor, the tensile strength is only about 21MPa, the elastic modulus is only 0.9GPa, the ring stiffness is poor, and the density is high, which is 0.94-0.96g / cm 3 , to meet the national standard ring stiffness cost is very high; polypropylene reinforced double-wall corrugated pipe has high tensile strength and high ring stiffness, but its impact resistance is poor and the cost is high

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