A plate for use in an extrusion-based additive manufacturing system made from or containing a top layer made from or containing a sheet or film made from or containing polyolefin composition A) made from or containing(i) 5-35% by weight of a propylene homopolymer or a propylene ethylene copolymer;(ii) 20-50% by weight of a copolymer of ethylene and a C3-C8 alpha-olefin; and(iii) 30-60% by weight of a copolymer of ethylene and propylenewherein the amounts of (i), (ii) and (iii) being referred to the total weight of (i)+(ii)+(iii) and the sum of the amount of (i), (ii) and (iii) being 100.