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K. J. Wilczyński, K. Buziak

Study on the flow of wood plastic composites in the starve fed single screw extrusion

Polimery 2017, No 9, 680


DOI: dx.doi.org/10.14314/polimery.2017.680

Summary

Experimental studies have been performed on the flow of wood plastic composite in the starve fed single screw extrusion. The extrusion process of polypropylene (PP) composite with various wood flour content at different operating conditions and level of starvation has been investigated. Melting and flow of the material were evaluated using "Screw Pulling-out Technique”. It was stated that the flow of wood plastic composite (i.e., conveying of the solid plastic material, melting and melt flow) in the starve fed extrusion is different from the flow of wood plastic composite in the flood fed extrusion. Also, it differs from the flow of thermoplastics in the starve fed extrusion. Melting in the partialy filled region is similar to the melting of thermoplastics in this region, i.e., it consists mainly in the conduction, while melting in the fully filled region is dependent on the wood flour content. At high content of wood flour, melting does not proceed according to the well-known Tadmor model, and one-dimensional melting is observed. At low wood flour content, the applicability of Tadmor model is clearly seen.
Keywords: starve fed single screw extrusion, wood plastics composites, melting
e-mail: wilczynski_k@wp.pl
K. J. Wilczyński, K. Buziak (521.9 KB)
Study on the flow of wood plastic composites in the starve fed single screw extrusion