A pe‑rt pipe material

Abstract

The invention relates to a PE-RT pipe material, which is composed of the following raw materials in parts by weight: 90-95 parts of polyethylene of raised temperature resistance (PE-RT), 0.2-0.5 part of an aromatic carboxylic acid salt polyolefin nucleating agent, 3-8 parts of styrene-acrylic ester emulsion, 8-15 parts of wood fiber and 0.2-0.5 part of vinyltri (beta-methoxyethoxy)silane, wherein the wood fiber is modified by the styrene-acrylic ester emulsion. The invention further relates to a PE-RT pipe prepared from the PE-RT pipe material and a preparation method of the PE-RT pipe. The PE-RT pipe prepared from the PE-RT pipe material has excellent long-term hydrostatic strength, is not in brittle failure under the temperature conditions that the temperature is lower than 110 DEG C, and can bear higher internal pressure, and the inflection point of a hydrostatic curve does not occur.

Description

technical field [0001] The invention relates to the technical field of plastic pipes, in particular to a PE-RT pipe material. Background technique [0002] In recent years, heat-resistant polyethylene (PE-RT) has been widely used in building heating and hot water supply projects because of its heat resistance and toughness, as well as its characteristics of welding and hot melting. PE-RT is a copolymer of ethylene and octene, which belongs to low-density polyethylene. This material improves the heat resistance of the product while retaining the good flexibility of PE, and is a non-crosslinked product. Compared with cross-linked materials, PE-RT materials not only have better hot-melt welding performance, but also have the advantage of being recyclable; but compared with polypropylene materials, PE-RT materials are stretchable under certain temperature conditions Insufficient tensile strength, generally only used in low-temperature, low-pressure hot water systems, such as lo...

AI Technical Summary

Problems solved by technology

Compared with cross-linked materials, PE-RT materials not only have better hot-melt welding performance, but also have the advantage of being recyclable; but compared with polypropylene materials, PE-RT materials are stretchable under certain temperature conditions Insufficient tensile strength, generally can only be used in low-temperature, low-pressure hot water systems, such as low-temperature floor radiant heating, etc.

For radiator heating systems with high internal pressure, PE-RT material pipes should not be used

In addition, PE-RT pipes are prone to brittle failure when used for a long time under various temperature conditions below 110 °C, that is, the inflection point of the hydrostatic curve

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