An all-plastic thermal insulation and pressure-resistant conveying pipeline and its preparation method

Abstract

The invention belongs to the technical field of pipelines, and provides a novel all-plastic heat-insulation pressure-resistant conveying pipeline and a preparation method thereof. The conveying pipeline comprises a pipe body, wherein the wall surface of the pipe body comprises a polyolefin outer layer, a polyurethane thermal insulation foam layer and a heat-resistant polyolefin composite materialinner layer sequentially from the outside to the inside, and the polyolefin outer layer is composed of the following components: in parts by weight, 50-60 parts of polyethylene, 30-50 parts of a thermoplastic elastomer, 5-30 parts of long glass fiber, 1-20 parts of polyester fiber or carbon fiber, 3-5 parts of sulfydryl graphene, 5-10 parts of polyhedral oligomeric silsesquioxane, 5-7 parts of maleic anhydride grafted thermoplastic elastomer, 1-10 parts of filler, 0.5-1 part of a lubricant, 1-2 parts of an antioxidant and 0.5-1 part of a mold release agent; and a long glass fiber reinforced polyethylene composite material is adopted as the heat-resistant polyolefin composite inner layer. The problems of low strength, poor toughness, poor impact resistance, low flame retardancy and other defects of a plastic conveying pipeline in the prior art are solved.

Description

technical field [0001] The invention belongs to the technical field of pipelines, and provides an all-plastic thermal insulation and pressure-resistant transportation pipeline and a preparation method thereof. Background technique [0002] In the past, water and gas pipelines mostly used steel pipes, insulation layers, and protective layers. However, such metal structure pipelines generally have disadvantages such as heavy weight, hard and brittle texture, high material prices, complicated processing technology, and high production costs. In order to overcome these defects, technicians in the industry continue to study plastic pipes to replace metal pipes to achieve the goals of corrosion resistance, simple processing, and low cost. However, the existing plastic pipelines have problems such as low strength, poor toughness, poor impact resistance, and low flame retardancy. Contents of the invention [0003] The invention proposes an all-plastic thermal insulation and press...

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Problems solved by technology

[0003] The invention proposes an all-plastic thermal insulation and pressure-resistant conveying pipeline and its preparation method, which solves the problems of low strength, poor toughness, poor impact resistance and low flame-retardant performance of the prior art plastic conveying pipeline

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