Process for extruding pyrotechnic compositions and...

Details Process for extruding pyrotechnic compositions and... Process for extruding pyrotechnic compositions and...

C - Chemistry, Metallurgy

06

B

52/50, 18/733

C06B 21/00 (2006.01) B29C 47/60 (2006.01) B29C 47/76 (2006.01) B30B 11/24 (2006.01)

Patent

CA 1084272

ABSTRACT OF THE DISCLOSURE Screw-extruder and process utilizing same for the production of extrusions formed of compositions based on plasticized nitrocellulose. Process comprises at least one sequence of the following main operations carried out in corre- sponding zones in the extruder: (i) mixing and shearing the constituents of the composition to effect gelatinization thereof; (ii) retadring the forward movement of the composition by throttling; and (iii) drying the gelatinized composition by evaporation under a reduced pressure prior to extrusion of the composition from the outlet die of the extruder.

261601

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