Cellulose has gained significant utilization over recent years as a bio-consumable reinforcing additive for a number of polymeric matrices. An efficient method for continuous production of these compounded materials has been identified as a fully intermeshing parallel twin screw extrusion system. This system offers significant flexibility in regards to the mechanical shear forces imposed – the effect of the dispersive (specifically for size reduction) impact on the cellulose – as well as distribution (homogeneous spacing within the polymer) of the resultant cellulose additive. Difficulty currently exists in regards to the actual introduction of the cellulose at an appropriate designation within the extrusion process, typically based upon flow properties/characteristic as well as objective moisture content. The purpose of this presentation is to propose a beneficial and efficient method for material introduction via inclusion of a side-stuffing feeding system for desired (and potentially high level) formulation specific cellulose content. Discussion regarding the effect of the shear impact from the twin screw process from a screw speed, residence time, and screw design will also be briefly presented.

Efficient compounding of cellulose with elastomeric materials via twin screw extrusion

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