| 摘要 |
A method for changing the physical structure of a ligno-cellulosic work piece having a selected grain and a first structural configuration. The first structural configuration preferably includes those structural and physical properties, including density and hardness, that are associated with an unplasticized ligno-cellulosic product. The method includes appropriate stucture for subjecting the ligno-cellulosic workpiece to electromagnetic radiation in the range of about 5 MHz and about 3 GHz to plasticize, e.g., soften, the lignin component of the material. The plasticized workpiece is then compressed along an axis transverse to the grain of the workpiece and stabilizes the workpiece by allowing said softened lignin components to bond together to attain a second structural configuration. The workpiece is compressed only when the moisture content is 30 % or less. |
