Method for preparing a thermoplastic composition based on polyolefins, resultingcomposition and application for making three-dimensional objects

摘要

The invention concerns a method for preparing a thermoplastic composition based on polyolefins for making three-dimensional objects, in particular thin-walled wrapping and packaging cases, which consists in incorporating into the polyolefins talc in a percentage substantially between 5 and 25 %, said talc being in the form of a powder with lamellarity index not less than 1.4 and particle size distribution such that the cut diameter D95 is not more than 18 microns and the median diameter D50 is not more than 6 microns, Said incorporation brings about a significant increase of the ratio Re/P in thermoformed three-dimensional objects, Re being the crush resistance between two surfaces of an object and P its weight.