公开(公告)号：US11780141B1

公开(公告)日：2023-10-10

申请号：US16701823

申请日：2019-12-03

申请人： U.S. Government as Represented by the Secretary of the Army

发明人： Nikolaos Ioannidis ,  Zohar Ophir ,  Viral Panchal ,  Philip Abbate ,  Francis Sullivan ,  Ming Wan Young ,  Costas G. Gogos

IPC分类号： B29C48/00 ,  B29C48/395 ,  B29C48/29 ,  C08J9/00 ,  B01F27/702 ,  B29K1/00

CPC分类号： B29C48/0012 ,  B01F27/702 ,  B29C48/29 ,  B29C48/397 ,  C08J9/0023 ,  B29C2948/92704 ,  B29K2001/18 ,  C08J2301/18

摘要： The present invention is directed to a continuous process for producing a foamable celluloid product by introducing a solid component (comprising nitrocellulose, chemical blowing agent (CBA), stabilizer and alcohol) and a liquid component (comprising camphor and acetone) into a mixer/devolatilizer machine where the chamber is under atmospheric pressure and having significant overhead space. The chamber is comprised of two zones wherein the first zone has a temperature that is less than the second zone and at least one rotor comprising hollow, temperature-controlled arms having a tilted angle affixed to the rotors. The rotors of the mixer/devolatilizer machine act to mix the solid and liquid components under lower shearing forces, lower mechanical stress and longer residence times than those used by twin-screw extruders.