the present invention relates to sheet materials suitable for use in or as a floor covering . the sheet materials comprise a polyalkene resin in intimate admixture with at least one additive comprising a filler , wherein the polyalkene resin has a relatively narrow molecular weight distribution and , a small amount of long chain branching and produced by a single site catalysed polymerisation of at least one , linear , branched or cyclic , alkene having from 2 to 20 carbon atoms . the present invention also extends to processes for the production of such sheet materials and floor coverings .