Wood preservative treatment method – diffusion method
According to the principle of molecular diffusion, with the help of water in wood as the carrier of drug diffusion, drug diffusion from high concentration to low concentration, diffusion to the deep wood.
Therefore, wood preservative treatment by diffusion method must meet the following conditions:
1. Small wood moisture content is high enough, usually more than 35% ~ 40%, the best wood;
2. Water-borne agent (diffusion), high solubility, and slow curing;
3. High ambient temperature and humidity. According to the operation process, the diffusion method can be divided into paste diffusion method, dip or spray diffusion method, band diffusion method, borehole diffusion method (or drip diffusion method) and double agent diffusion method. Diffusion treatment equipment investment less production process is simple. Easy to be applied and promoted in the vast rural areas. Similar to this method is the SAP replacement method.
