Consolidation and Friction Mechanisms of Wood Composites and Their Influence on Pultrusion Processing.

摘要

The polymer processing technique of pultrusion can be utilized to produce woodbased composites, however, limitations occur in the ability of the composite system to flow through the stationary die. The consolidation and frictional response of the wood composite impose the resistance to flow as the material is conveyed through the die through a pulling action. The objectives of this research is to describe the mechanisms that govern the consolidation and frictional behavior of a wood fiber composite, how these mechanisms respond to the pultrusion conditions and composite design, and their influence on application and process engineering of a pultrusion operation. Utilizing a non-woven wood and wood/polypropylene (PP) fiber mat, the uniaxial compression and sliding frictional response was tested and described. The description of consolidation and friction were then incorporated into a pulling force model and compared to experimental pultrusion runs.