Influence of extruder screws speed and process temperature on the extrudate shape changes of the maize-spelt blends

Open Access

Table 1.

Correlation coefficients for spelt share (70, 80, 90 and 100%) in the mixture according to various shape coefficients.

Variable	Extrudate produced at temp. 120 °C, screws speed 300 Rpm	Extrudate produced at temp. 140 °C, screws speed 300 Rpm	Extrudate produced at temp. 120 °C, screws speed 350 Rpm	Extrudate produced at temp. 140 °C, screws speed 350 Rpm
Area [mm²]	0.931^*	0.926^*	0.863^*	0.904^*
Elongation Factor	-0.949^*	-0.902^*	0.783^*	0.785^*
Heywood Circularity Factor	-0.921^*	-0.898^*	0.876^*	0.709^*
Compactness Factor	0.928^*	0.939^*	-0.709^*	-0.731^*

Correlation coefficients are significant for p < 0.05. * - for any spelt share in the compound measure were been 5 repeated.

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