TECHNOLOGY FOCUS - MECHANICAL ENGINEERING - Preferred System: The geometry of the extruder screw (20) and/or the cylindrical casing (10) at or before the section(s) with degassing openings, is provided with heating elements and/or arranged so that a higher pressure is exerted by the casing and/or the screw (20) before the degassing zone on the extrusion material which expands into the degassing zone; the geometry of the screw (20) comprises that of the screw zone itself and/or the screw pitch, the diameter, and the space between the outside of the screw and the inside of the casing (10); the geometry of the casing (10) comprises the inside diameter, the internal geometry and the internal cross-sectional area of the casing (10).    TECHNOLOGY FOCUS - POLYMERS - Preferred Method: Extrusion comprises at least partial liquefaction of binder components and/or starting material by melting and/or dissolution; mobilisation involves pulverising, pressing and/or heating. Removing liquid from the extrusion material involves removing steam or water during extrusion and before discharging the material from the extruder, by passing steam or water through opening(s) in the extruder wall. Extrusion also involves pulverising and/or homogenising the extrusion material, with drying before, after and/or during pulverisation/homogenisation. The raw material component and the binder component are introduced into the extruder in a wt. ratio of (1:100)-(99:1), preferably (30:70)-(60:40) or up to (99:1). Extrusion is carried out in several sections with temperatures of 30-40 degrees C in an inlet section, 50-190 degrees C in a degassing section and 50-170 degrees C in an outlet section, or with temperatures between 50 and 200 degrees C, and/or the extruder is operated with a screw speed of 10-1500, 500-30 or 250-50 r.p.m. Preferred Materials: Binder components comprise thermoplastic biopolymers, polymers based on renewable raw materials, thermoplastic starch or starch derivatives, matrix polymers based on renewable raw materials or biodegradable matrix polymers, polyhydroxy alkanoates, polylactide, polyesters, thermoplastic regenerated cellulose or derivatives, water-soluble binders, polyvinyl alcohols, polyvinyl acetate, polycaprolactone, polymers based on other biogenic monomers, mixtures of these, reprocessed plastics, waste materials with thermoplastics, thermoplastics or combinations of these. Raw material components comprise free-flowing, pourable, particulate materials made from renewable or petrochemical sources and/or by reprocessing, pulverisation or pressing and/or made from waste materials, cellulose-based materials, combustible vegetable materials, cellulose-based materials with wood, hemp or bamboo granules or flour, wood, plant stems, wood flour, wood chips or shreds, chopped wood, grass, fibrous cereals or forestry waste, natural fibres or cellulose fibre material, paper, paper-like residues, sewage sludge or residues, and products such as straw, wood chips, malt residues, rapeseed cake, cereal waste and molasses. One or both component(s) is/are not predried and show(s) a total moisture content of at least 1, at least 9, at least 10, at least 30, at least 40, between 40 and 60, or at least 50 wt.%.