Abstract
ABSTRACTA commercial Creusot‐Loire BC‐105 twin‐screw expanded dry pet food extruder was operated to provide extruded moistures between 7.9% and 12.4% at constant product density. Low moisture extrusion decreased product uniformity 45% and product shape roundness by 70%. It increased air ceil size 41% and internal fissuring by 25%. After drying all samples to low moisture, the samples extruded at a low initial moisture were more fragile with 15% lower ultimate strength as measured by crushing with an Instron testing machine.
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