Fecha de publicación: 10/03/2011 Fuente: WIPO "miel" An injection moulding process for making parts, comprising the steps of: providing molten polypropylene composition comprising particulate CaCO3 and additive; injecting said polypropylene composition into a mould to form said part; cooling said polypropylene composition to solidify it; ejecting said part from the mould; preparing the mould for moulding the next part; wherein the time of the cooling step is shortened by at least 1.5% compared to said process using a reference polypropylene composition substantially free of CaCO3.