Solid state shear extrusion pulverization

Details Solid state shear extrusion pulverization Solid state shear extrusion pulverization

B - Operations, Transporting

02

C

B02C 19/22 (2006.01) B02C 23/00 (2006.01) B29B 13/10 (2006.01) B29C 47/40 (2006.01)

Patent

CA 2102257

A process and apparatus for pulverization of natural and synthetic polymeric material by applying normal and shear forces sufficient to form fine powder by oppositely rotating generally conical meshing screws. The fine powder may be fluidized to prevent agglomeration and assist in its discharge. The process is suitable for thermoplastic and thermosetting polymers and foams. The process and apparatus are suitable for enhancement of reactivity of polymeric and solid monomeric material to form homopolymers, copolymers, and new polymeric materials.

Procédé et appareil conçus pour pulvériser un matériau polymérisé naturel et synthétique en appliquant des forces normales et de cisaillement suffisantes pour que la rotation en sens contraire de vis généralement coniques produise une poudre fine. Cette dernière peut être fluidifiée pour empêcher l'agglomération et pour favoriser son évacuation. Le procédé est adapté aux polymères et aux mousses thermoplastiques et thermodurcissables. Ce procédé et cet appareil sont conçus pour améliorer la réactivité des polymères et des monomères solides dans la formation des homopolymères, des copolymères et de nouveaux matériaux polymérisés.

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