Patent ID: 8729144

Claim:
A foamed polypropylene composition comprising a propylene homo- and/or copolymer and glass fibres, wherein (i) the composition has a density of 50 to 900 kg/m 3 , (ii) the tensile modulus tm (extrusion direction) measured according to ISO 527 in extrusion direction and the k-value measured according to ASTM C-518 satisfy the relation: tm (extrusion direction) [MPa]/k[W/mK]≧9000 MPa·mK/W; wherein the glass fibres are present in an amount of 12 wt % of the composition; and wherein the composition has a k-value measured according to ASTM C-518 in the range of from 0.01 W/mK to 0.091 W/mK; wherein the propylene homo- and/or copolymer comprises (A) 5 to 80 wt. % of a propylene block copolymer which shows strain hardening behaviour, and (B) 20 to 95 wt. % of an isomeric polypropylene having a Charpy Notched Impact Strength at 23° C. measured according to ISO 179/1eA of 25 kJ/m 2 or higher; and (C) 0.1 to 5 wt. % of an alpha-nucleating agent; wherein the foamed composition is produced using a physical or chemical foaming agent.