Secondly, the degreasing of masson pine can be treated by chemical methods. There are many degreasing methods, such as solution extraction, chemical reagent treatment, cooking, distillation, resin curing and so on. The above methods have their own advantages and disadvantages, and should be considered comprehensively from two aspects: economic benefit and degreasing effect.
Thirdly, there are many reagents (degreasing agents) that can react with resin and remove resin, such as nitrogen-containing heterocyclic compounds and their salts, bases and organic solvents.
4. At present, the standard on which masson pine is degreased is mostly Fujian local standard FDB/xz2276-89 "Degreased masson pine sawn timber". How to degrease pine to meet the strict requirements of export products depends on the specific production process of each manufacturer. The following are common methods for degreasing pine for reference only:
1, steam high-temperature drying method (suitable for wood degreasing drying in wood factories, furniture factories and wood component factories with a certain production scale)
2. Liquid boiling method
3, steam vacuum drying method