초록 ▼

An apparatus for solid state shear extrusion pulverization of a polymeric material comprising an elongated hollow barrel having a feed zone, a heating zone adjacent to the feed zone, a powder formation zone adjacent to the heating zone, and a powder discharge zone adjacent to the powder formation zo

An apparatus for solid state shear extrusion pulverization of a polymeric material comprising an elongated hollow barrel having a feed zone, a heating zone adjacent to the feed zone, a powder formation zone adjacent to the heating zone, and a powder discharge zone adjacent to the powder formation zone. At least one screw is housed within the elongated hollow barrel. A hopper is provided for feeding the polymeric material into the feed zone of the elongated hollow barrel. Barrel heaters and coolers are provided for heating the polymeric material to a temperature less than its decomposition temperature in the heating zone and for maintaining the polymeric material below its melting point in the powder formation zone. The screw comprises a high shear screw section for applying normal and shear forces within the powder formation zone to form a powder of the solid state polymeric material.

대표청구항 ▼

[ I claim:] [1.] An apparatus for solid state shear extrusion of a polymeric material comprising:an elongated hollow barrel having a feed zone, a heating zone adjacent said feed zone, a powder formation zone adjacent said heating zone, and a powder discharge zone adjacent said powder formation zone;

[ I claim:] [1.] An apparatus for solid state shear extrusion of a polymeric material comprising:an elongated hollow barrel having a feed zone, a heating zone adjacent said feed zone, a powder formation zone adjacent said heating zone, and a powder discharge zone adjacent said powder formation zone;at least one screw housed within said elongated hollow barrel;feed means for feeding said polymeric material to said feed zone;temperature adjustment means for heating said polymeric material to a temperature less than its decomposition temperature in said heating zone and for maintaining said polymeric material above its phase transition temperature and below its melting point in said powder formation zone; andhigh shear friction means for applying normal and shear forces sufficient to form a powder in said powder forming zone.