Process for transforming synthetic and vegetable fibres into a non-woven fabric of the type which provides the following sequence of processing steps: flock opening step, during which fibrous materials of different shapes and sizes are transformed into fibre flocks of different lengths； drawing and treatment step of the material selected in the previous step； cutting and trimming step: once the drawing and treatment step of the material has been completed, the non-woven fabric is subject to longitudinal cutting and trimming, to make a series of rolls, usually two or three, for final use, characterised in that, after the opening step, the flocks are transferred to a condenser, where the long-fibre flocks are separated from the short-fibre flocks, by means of a perforated mesh screen.
