Regeneration polyethylene resin combination for sheath production and preparation method thereof

Abstract

The invention discloses a regeneration polyethylene resin combination for sheath production and a preparation method thereof. The regeneration polyethylene resin combination for sheath production is prepared by the following raw materials, by weight: 70-80 parts of polyethylene pipe reworked materials, 8-10 parts of polyethylene bottle cover reworked materials, 10-15 parts of linear low density polyethylene (LLDPE) film reworked materials, 2-5 parts of ethylene-vinyl acetate ester copolymers, 0.2-0.4 parts of antioxidants, 5-7 parts of carbon black master batches and 0.01-0.03 parts of processing agents. The raw materials are put into a high-speed mixer to perform stirring and mixing, and evenly-mixed materials are fed into a double-screw extruder to perform melting, plasticization, extrusion and pelleting. The combination has excellent physical and mechanical properties, environmental stress crack resistance (ESCR), thermal aging resistance and processability, wherein the ESCR (10%, F0) is larger than or equal to 500 hours, thermal aging elongation at break at the temperature of 110 DEG C for 1500 hours is larger than or equal to 650%, tensile strength is larger than or equal to 28MPa, and the processing traction speed is larger than or equal to 30m / min.

Description

technical field [0001] The invention belongs to the technical field of chemical synthesis of polymer materials, and in particular relates to a recycled polyethylene resin composition used in sheath production and a preparation method thereof. Background technique [0002] my country is a country with a large demand for crude oil. According to statistics, in 2011, the national crude oil processing volume reached 448 million tons, and the import volume was 253.78 million tons, a year-on-year increase of 6%, and the foreign dependence reached 56.5%. At present, the annual production of waste plastics in China is about 10 million tons, plus the annual import of nearly 5 million tons, the overall possession is about 15 million tons per year. A large number of waste plastics that cannot be naturally degraded not only cause serious environmental pollution, but are also not conducive to the development of the national economy. At the same time, plastics are prepared by synthesis of...

AI Technical Summary

Problems solved by technology

A large number of waste plastics that cannot be degraded naturally not only cause serious environmental pollution, but also are not conducive to the development of the national economy

At the same time, plastics are prepared by synthesis of natural resources such as oil, natural gas, and coal. In the case of increasingly scarce natural resources, especially when my country's per capita oil resources are scarce, the abandonment of a large number of waste plastics has undoubtedly caused Great waste of social wealth