The Research On Deresination Of Furniture Material Masson Pine's Lumber With Solvent Distillation Method

Pine is a kind of wood which grows fast. However, there is too much Pine oleoresin in Pine wood. So the Pine wood is difficult to be colored, decorated and staled. The experiment is made for degreasing of Masson Pine lumber. So that the Pine can be used for furniture material, its value can be improved. Also it can open a new way for furniture material.The paper has some new ideals based on the experience of some scholars. It builds a new craft and gets some results:1. In order to examine the traditional theory whether water and resin have a boiling point. We made experiment, and the results show that that is impossible. It is necessary to find a kind of solvent that has a boiling point with resin for exploding new ways to degrease.2. Considering that the ethanol and water can be insoluble, ethanol and resin can be insoluble. It is possible to have a boiling point for the three kind of matter. So I made an experiment to test the boiling point. The experiment indicates the boiling point is different when the rate of the three is different. When the rate is 3:1:1, the boiling point is 88℃.3. Considering that the ethanol is low toxicity, low cost and easy recovery. I try to take the ethanol as the first solvent to degrease, and make the attempt experiment.The purpose of the deracination of Masson Pine lumber with Solvent distillation method is:take the usage of the low boiling point and the insolubility of the ethanol, and it can penetrate deeply. Under the pressure of solvent boiled at a lower temperature and the low pressure of the containers, the vessel space forms the resin to squeeze out so that it achieves the degreasing the goal.4. The attempt experimentⅠ,Ⅱ,Ⅳindicates that the heating time, the solvent density, the lumber moisture content have remarkable influence to the degreasing effect. Its influence tendency respectively is:Heating too long, the degreasing rate is higher; the solvent density and the lumber moisture content is higher, degreasing rate increases, but the color of the wood is deepened.5. Comparing the effect of the factor affecting the pine lumber degreasing, and the result of orthogonal experiment of the deracination of Masson Pine lumber with Solvent distillation method is:the pine lumber moisture content>the solvent density>the heating time. The superior plan is:The pine lumber moisture content is120%, the solvent density is 70%, heating time is 6h. And the results of the superior plan is the degreasing rate approximately 88%, escapes the oil rate approximately 92%, the degreasing depth is 5.7cm.6. The material examination result indicates that the size stability, mechanics performance, the paint performance, the stalemate performance of the degreased Pine lumber buy the superior plan all are meeting the furniture timber standard. This craft indicates that it can achieve the better degreasing effect, and break through the traditional degreasing method fence in the certain degree. The ethanol solvent may be used circulate; it is easy to separate the resin from the ethanol and make its usage. This develops an easier industrialization production craft which is low energy consumption, low cost and meeting environmental protection.