NATwood Procedure


	PROCEDURE A blend of molten natural resin and wax is pressed into the wood matrix under the influence of pressure. Such pressing in - the technical term is loading of the wood - is carried out in a common, for NATwood specially equipped pressure resin injection reactor of comp. Scholz. The chamber is charged with wood, is flooded with the melted loading substance and subsequently pressurized. After approximately 30 minutes the cycle is over.
	pressure chamber	The loading substance penetrates the wood from outside. The penetration depth of the loading mass depends on the conditions of pressure and temp- erature and duration. Depending on the type of wood a penetration depth of 3 - 15 mm is achieved. The optimum loading conditions must be determined by testing the type of wood to be employed. How- ever for many types of wood the loading conditions are already known. Physical conditions: Temperature of melt: 110-180° C Loading pressure: 2-20 bar Cycle time: 10-60 minutes Moisture of wood: less than 18 weight %