Denes Hunkar (d. 2004) was an innovator in process control, particularly in blow molding and injection molding.

Born in Keked, Hungary, Hunkar earned a dual masters degree in electrical engineering and mechanical engineering, and a PhD in nuclear engineering.

Hunkar's first plastics invention was the first electronic parison programmer for extrusion blow molding developed in 1958. In 1962 he founded Hunkar Instrument Development Laboratories in Cincinnati that specialized in instrument technology for several industries, its products including prototypes for the heart monitor, the CAT scan, and the blood analyzer. In 1970 he changed the company name to Hunkar Laboratories and concentrated on the need for process control in the plastics industry. His innovations included the first closed loop process control for injection molding in 1970, the first methodology for internal surface cooling in blowmolding (1973), and the first microprocessor-based machine control (1978). Later work in the process control field included statistical process control and automated process management for plastics manufacturing.

Hunkar earned The Society of Plastic Engineers (SPE) International Award for Engineering and Technology in 1991, SPE's International Award for Business Management in 1992, and SPE's Blow Molding Division Distinguished Achievement and Man of the Year awards. He was inducted into the Plastics Hall of Fame in 2005.