| US 11,780,141 B1 | ||
| Continuous process for producing foamable celluloid | ||
| Nikolaos Ioannidis, Bloomfield, NJ (US); Zohar Ophir, West Orange, NJ (US); Viral Panchal, Parlin, NJ (US); Philip Abbate, Hackettstown, NJ (US); Francis Sullivan, Morristown, NJ (US); Ming Wan Young, Basking Ridge, NJ (US); and Costas G. Gogos, Wyckoff, NJ (US) | ||
| Assigned to The United States of America as Represented by the Secretary of the Army, Washington, DC (US) | ||
| Filed by U.S. Government as Represented by the Secretary of the Army, Dover, NJ (US) | ||
| Filed on Dec. 3, 2019, as Appl. No. 16/701,823. | ||
| Claims priority of provisional application 62/775,139, filed on Dec. 4, 2018. | ||
| Int. Cl. B29C 48/00 (2019.01); B29C 48/395 (2019.01); B29C 48/29 (2019.01); C08J 9/00 (2006.01); B01F 27/702 (2022.01); B29K 1/00 (2006.01) | ||
| CPC B29C 48/0012 (2019.02) [B01F 27/702 (2022.01); B29C 48/29 (2019.02); B29C 48/397 (2019.02); C08J 9/0023 (2013.01); B29C 2948/92704 (2019.02); B29K 2001/18 (2013.01); C08J 2301/18 (2013.01)] | 16 Claims |
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1. A process for preparing foamable celluloid comprising:
introducing into an automated machine a celluloid composition comprising nitrocellulose, camphor, blowing agent, and at least one volatile liquid, wherein the automated machine comprises an enclosed, temperature-controlled chamber, comprising at least one rotor shaft along the interior longitudinal axis of the enclosed chamber, and wherein the rotor shaft comprises at least one mixing element fixed to the shaft and wherein a continuous, partially filled volume is maintained throughout the chamber; mixing the celluloid composition to obtain a homogenous mixture with the at least one mixing element and removing the at least one volatile liquid of the celluloid composition; and discharging foamable celluloid from the chamber; wherein the celluloid composition is subject to non-pressurized conditions in the temperature-controlled chamber. |