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AssigneeSociete Nationale des Poudres et Explosifs
InventorsLouis Leneveu, Didier Treneules
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The present invention relates to a new type of fragmentable charge for weapons of small and medium caliber. The process for the manufacture of fragmentable charges of propellant powder containing nitrocellulose, according to the invention, is characterized in that, in a conventional process for the manufacture of propellant powder containing nitrocellulose, with solvent, a glazing operation is carried out, in which a glazing solution containing at least polyvinyl nitrate and a stabilizer is sprayed onto the grains of powder, and in that, after evaporation of the solvent from the said solution, the grains of powder thus obtained are compressed at between about 80.degree. and 120.degree.. The invention also relates to the fragmentable charges obtained by means of this process.
Process for the manufacture of fragmentable charges from grains of propellant powder containing nitrocellulose comprising (1) malaxating nitrocellulose in a first solvent which has a gelatinizing action for nitrocellulose thus obtaining a paste, (2) extruding the paste to obtain strands, (3) chopping the strands to obtain grains, (4) drying the grains, (5) spraying the grains with a glazing solution containing at least polyvinyl nitrate, a second solvent, and a stabiliser to obtain grains coated with polyvinyl nitrate, (6) evaporating the second solvent and (7) compressing the resulting grains at a temperature of 80.degree. to 120.degree. C. to form said fragmentable charges.
Fragmentable charges based on grains of propellant powder containing nitrocellulose, prepared by (1) malaxating nitrocellulose in a first solvent which has a gelatinizing action for nitrocellulose thus obtaining a paste, (2) extruding the paste to obtain strands, (3) chopping the strands to obtain grains, (4) drying the grains, (5) spraying the grains with a glazing solution containing at least polyvinyl nitrate, a second solvent and a stabilizer to obtain grains coated with polyvinyl nitrate, (6) evaporating the second solvent and (7) compressing the resulting grains at a temperature of 80.degree. to 120.degree. C. to form said fragmentable charges.
Dependencies are inferred from the claim text.