Method for utilizing waste HDPE plastic to prepare large-caliber double-wall bellow

Abstract

The invention discloses a method for utilizing waste HDPE plastic to prepare a large-caliber double-wall bellow, essentially comprising the following steps of: using waste high-density polyethylene (HDPE) to prepare a double-wall bellow with the caliber of 1200mm; carrying out cooperative combination to strip, fibrous and spherical fillers; adopting novel elastomer as basic resin; preparing modified master batch which has functions of reinforcing and toughening to the waste HDPE; and using the functional master batch to carry out modification to the waste HDPE so as to lead the mechanical performance thereof to reach the level of new resin of HDPE; and an extrusion mould of the large-caliber double-wall bellow adopts arc structure at peak part, thus improving the ring stiffness of the product and leading the product parameters to meet standard requirements.

Description

technical field

[0001] The invention relates to a method for preparing a large-diameter double-wall corrugated pipe, in particular to a method for preparing a large-diameter double-wall corrugated pipe by using waste HDPE plastics. Background technique

[0002] With the continuous and rapid development of China's national economy, the scale of municipal construction is also expanding. Drainage and sewage pipes are an important part of the municipal pipe network system, and their performance will directly affect the reliability and safety of the sewage discharge system. It is the general trend to eliminate concrete pipes, cast iron pipes, ceramic fired pipes, etc. Developed countries have legally banned the use of these seriously polluting pipes, and China will also be in line with international standards. Use concrete pipes. Relying on its own unique advantages, high-density polyethylene (HDPE) double-wall corrugated pipes have occupied an increasing market share in draina...