Analysis of intensity of changes in the moisture content of wood chips in the production of wood polymer composites during drying and storage processes

The article presents the results of research on changes in humidity of wood chips intended for the of wood-polymer composites (WPC) manufacture. In the studies were used wood chips of various origin (coniferous and deciduous wood) and the various forms (from dust-meal, through small chips on big chips). Measured moisture content of chips during drying in the dryer and after that, during the natural return to hygroscopic equilibrium with the atmosphere of the storage space. After drying, the samples were stored in open and closed containers.

The potential for using corn stalks as a raw material for production particleboard with industrial wood chips

In this study particleboards were manufactured from mixtures of corn stalks (Zea mays indurate Sturt.) and industrial woodchips at several ratios. The corn stalks and industrial wood particles were mixed at ratios 0, 25, 50, 75 and 100 % respectively. The suitability of corn stalks chips for particleboard production was examined. Urea formaldehyde resin was used as a binder in 3-layers particleboards. Produced panels were tested for certain mechanical and physical properties. The manufactured boards were tested according to EN standards. In addition, the chemical properties of corn stalks were evaluated. Experimental results indicated that increase in corn stalk chips in the mixture generally diminished the mechanical and physical properties.