Method of manufacturing an artificial paper

Claim 1

A PROCESS FOR THE MANUFACTURE OF ARTIFICIAL PAPER REQUIRING NEITHER CALENDERING NOR BIORIENTATION, WHICH COMPRISES HOMOGENIZING IN A CONVENTIONAL ROTARY MIXER A COMPOSITION CONTAINING: 40 TO 80 PERCENT BY WEIGHT OF AT LEAST ONE RIGID POLYOLEFIN (A) SELECTED FROM THE GROUP CONSISTING OF HOMOPOLYMERS AND COPOLYMERS OF ETHYLENE, PROPYLENE, AND BUTYLENE AND ALSO MIXTURES THEREOF, AND HAVING A MELT INDEX OF AT MOST 1 DG./MIN., 5 TO 30 PERCENT BY WEIGHT OF AT LEAST ONE POLYMER (B) WHICH IS INCOMPATIBLE WITH THE RIGID POLYOLEFIN (A) AND WHICH WHEN EXTRUDED BY ITSELF PRODUCES A BRITTLE FILM WHICH HAS A MELT INDEX LOWER THAN 10 DG./MIN., THE POLYMER (B) BEING SELECTED FROM THE GROUP CONSISTING OF HOMOPOLYMERS AND COPOLYMERS CONTAINING A PREPONDERANT AMOUNT OF STYRENE AN AMOUNT WITHIN THE RANGE OF 20 TO 25 PERCENT BY WEIGHT OF A MACROMOLECULAR MATERIAL (C), SAID AMOUNT BEING SUFFICIENT TO PRODUCE COMPATIBILITY BETWEEN (A) AND (B), SELECTED FROM THE GROUP CONSISTING OF: COPOLYMERS OF T LEAST ONE MONOMER SELECTED FROM THE GROUP CONSISTING OF ETHYLENE, PROPYLENE, AND GROUP CONAND AT LEAST ONE MONOMER SELECTED FROM THE GROUP CONSISTING OF ISOBUTYLENE, BUTADIENE, AND ISOPRENE, AND SAID MACROMOLECULAR MATERIAL HAVING A MELT INDEX OF AT MOST 2 DG/MIN., 5 TO 45 PERCENT BY WEIGHT OF AN INORGANIC FILLER (D) HAVING A GRANULOMETRY LOWER THAN 50 MICRONS, 0 TO 10 PERCENT BY WEIGHT OF ADJUVANTS (E) SELECTED FROM THE GROUP CONSISTING OF ANTIOXIDIZING AGENTS, THERMAL STABILIZERS, OPTICAL BLEACHING AGENT, PIGMENTS, COLORING MATERIALS, ANTISTATIC AGENTS, AND LUBRICANTS, THE MIXTURE THUS HOMOGENIZED BEING SUBJECTED TO EXTRUSION TO OBTAIN AN ARTIFICAL PAPER AND THE ARTIFICAL PAPER THUS, OBTAINED, IF DESIRED, BEING SUBJECTED TO SURFACE TREATMENT.