The experimental setup used in this study was a twin-screw extrusion system (fig. 1). The twin-screw extrusion
system consists of an extruder driver with a speed control gearbox, a Werner Pfleiderer ZSK-30 twin-screw co-rotating
extruder with a screw diameter of 30 mm, an L/D of 32, a positive displacement pump for injecting water into the extruder,
accurate single-screw feeders for feeding starch, and PHAE and talc could be fed individually or as a mixture. A cylindrical
filament die 2.7mm in diameter and 12.7mm in length, with a cooling sleeve was assembled to the extruder. The sensors
were mounted on the die to measure the temperature and pressure of the melt. A high-speed cutter was used to get loose fill
of required size.
The foam sheets were produced on an industrial scale twin-screw food extruder, Wenger-80, having a screw
diameter of 80mm and an L/D of 16. An annular die of width 2mm was used. Talc was not used in the production of starch
foam sheets in order to get the minimum density product. Also, the addition of talc rendered the product more brittle.
The experimental setup used in this study was a twin-screw extrusion system (fig. 1). The twin-screw extrusionsystem consists of an extruder driver with a speed control gearbox, a Werner Pfleiderer ZSK-30 twin-screw co-rotatingextruder with a screw diameter of 30 mm, an L/D of 32, a positive displacement pump for injecting water into the extruder,accurate single-screw feeders for feeding starch, and PHAE and talc could be fed individually or as a mixture. A cylindricalfilament die 2.7mm in diameter and 12.7mm in length, with a cooling sleeve was assembled to the extruder. The sensorswere mounted on the die to measure the temperature and pressure of the melt. A high-speed cutter was used to get loose fillof required size.The foam sheets were produced on an industrial scale twin-screw food extruder, Wenger-80, having a screwdiameter of 80mm and an L/D of 16. An annular die of width 2mm was used. Talc was not used in the production of starchfoam sheets in order to get the minimum density product. Also, the addition of talc rendered the product more brittle.
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