Production of compressed wood with target quality indicators from different parts of tree trunk

Abstract

Wood species has great influence on the service life and quality of compressed wood. Currently, the industry lacks high-quality wood, so one of the solutions to this problem is the possibility of expanding the species composition used for the manufacture of compressed wood. The predominant group of species is soft hardwoods. It is advisable to use birch wood for the production of compressed wood. This conclusion is made on the bases of wood species stock and its physical and mechanical properties. Information on the nature of raw materials is needed to implement the pressing wood technology. Wood is a biological material whose properties change in the tree trunk. Changes in moisture content and wood density in the height of the tree trunk have been studied. The necessary degree of pressing has been determined on the basis of these data. It takes into account the required final density of compressed wood. Initial thickness of the specimens has also been calculated. This has made it possible to obtain a uniform density of compressed wood. It also reduces raw material consumption, taking into account from what part of the tree trunk the wood was taken.