Pressureless pipe comprising a multimodal polyethylene composition with an inorganic filler

Abstract

The present invention relates to a pipe or a supplementary pipe article comprising a polyethylene composition comprising a base resin which comprises (A) a first ethylene homo- or copolymer fraction, and (B) a second ethylene homo- or copolymer fraction, wherein fraction (A) has a lower average molecular weight than fraction (B), the base resin has a flexural modulus determined according to ISO 178 of 1000 MPa or higher, and the composition further comprises (C) an inorganic mineral filler, wherein inorganic mineral filler (C) is present in the composition in an amount of 1 to 70 wt. %, and to the use of said composition for the production of a pipe or a supplementary pipe article.

Description

technical field [0001] The present invention relates to a pipe, and more particularly to a pipe for conveying unpressurized fluids, said pipe comprising a polyethylene composition comprising a polyethylene base resin and an inorganic mineral filler. Furthermore, the invention relates to the use of said composition for the manufacture of pipes. Background technique [0002] Polyethylene compositions are often used in the manufacture of pipes due to their good physical and chemical properties such as mechanical strength, corrosion resistance and long-term stability. For example, when conveying tap water or natural gas, the fluid conveyed in the pipe can be pressurized; The fluid conveyed in the tubing may be unpressurized when removing dirt and waste. The fluid conveyed within the tubing may have varying temperatures, typically in the range of 0°C to 50°C. [0003] In particular, the invention relates to tubing for conveying unpressurized fluids. Such pipes are often refer...

AI Technical Summary

Problems solved by technology

Weld strength is known to be generally insufficient especially for filled polymer compositions

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