| 摘要 |
26129-18 During the production of pressure moulded bodies a bonding agent that is a condensation resin with a solid resin content of at least 80% and a water content of at most 7%-wt, preferably however, of at most 5%-wt is applied in liquid or brushable form to wood chips and/or wood fibres having a moisture content of at most 10%-wt, preferably however, at most 8%-wt as starting material (this condensation resin optionally containing additives such as pigments). The wood chips and/or fibres that have been so coated--optionally between cover layers of paper that has been impregnated with synthetic resin--are hot pressed together with the cover layers at, for example, 70 bar as the resin is hardening, so as to form a pressure moulded body. Panellike rough-pressed blocks can be formed from the above mentioned coated wood chips and/or fibres or alternatively, one can coat wood fibres that are already in the form of insulating panels or mats with the bonding agent. These then form rough cast blocks or insulating panels that can be handled and transported, and which are then used as press goods for the hot-pressing process. |
