Extruded polyolefin moulding

Abstract

Extruded moulding prepared from a polyolefin-based composite material. The composite material comprises 98-50 wt % of a polyolefin, 1-50 wt % of another homo-or copolymer and 0.1-70 wt % of a layered, interstratified clay. The moulding normally contains 0.1-10 wt. % of the clay and can be aftertreated after extrusion. Such a nanocomposite has a low viscosity in the melt at high shear forces, so in the melting apparatus, and also a high viscosity in the melt at low shear forces, so after the melt has left the melting device, which is beneficial during the extrusion process. Further advantages are that the balance between rigidity and toughness and the balance between rigidity and transparency of the mouldings are better. The moulding can be obtained from a concentrate of the nanocomposite and a polyolefin. This concentrate generally contains 10-70 wt. % of the clay.

Dependencies are inferred from the claim text.