Solid material comminution or disintegration – Processes – With application of fluid or lubricant material
Patent
1995-05-15
1998-04-28
Han, Frances
Solid material comminution or disintegration
Processes
With application of fluid or lubricant material
241 17, 241 23, 241 65, 2412601, 366 85, 366 88, 366 89, B02C 2300, B02C 2328, B02C 1922
Patent
active
057434719
ABSTRACT:
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.
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Han Frances
Illinois Institute of Technology
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