Method for producing rubber tree carbonized wood by resin pretreatment

Abstract

The invention belongs to the technical field of wood modification, in particular relating to a method for producing rubber tree carbonized wood by resin pretreatment. The method comprises the following steps: putting the rubber saw wood of which the water content is less than 15% in a vacuum treatment tank for impregnating; then, stacking and airing the wood, putting the wood in a kiln, routinelydrying the wood in the kiln until the water content is less than 12%, and then, taking the wood out of the kiln; and putting the obtained wood in heat treatment equipment for high-temperature heat treatment, and taking the wood out of the kiln to obtain the rubber tree carbonized wood, wherein the water content of the wood is 4-6%. The invention has simple processes, high heating rate in the heattreatment process and high production efficiency, can increase the strength of the rubber tree carbonized wood by vacuum pressurization and impregnation of resin, and can effectively prevent the woodfrom deforming and cracking in the heat treatment process. The obtained rubber tree carbonized wood has the advantages of little loss of strength of the wood, elegant color, more excellent dimensional stability and durability and the like, and can be widely used for indoor and outdoor floors, landscapes, decorative materials and the like, thereby widening the application field of the rubber tree wood and increasing the additional value of the rubber tree wood.

Description

technical field [0001] The invention belongs to the technical field of wood modification, and relates to a method for producing carbonized wood by pretreating rubber wood by resin impregnation, in particular to a method for producing carbonized rubber tree wood by resin pretreatment, especially for improving the mechanical strength of heat-treated wood and for outdoor use Anti-mildew, anti-corrosion performance, and reduce cracking. Background technique [0002] Rubber trees (Hevea brasiliensis) are widely planted in Hainan, Yunnan, and Southeast Asia. Rubber wood is a by-product resource after cutting rubber. The annual output of rubber wood in Southeast Asia exceeds 10 million m 3 , my country's rubber tree plantation area is 13 million mu, and 1.8 million m of wood can be obtained every year 3 , Rubberwood has become an important commercial forest plantation material produced in the tropics. Rubberwood loose-porous wood, dry shrinkage, easy processing, suitable for maki...

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Problems solved by technology

Application of existing thermal modification technology to produce rubber tree carbonized wood at a temperature above 200 ° C, its color is obviously darkened, similar to teak, and the color is elegant, but the flexural strength and impact toughness of the obtained carbonized wood are significantly reduced, such as treatment at 220 ° C for 3 hours, The loss of flexural strength of wood reaches 38-50%, the wood becomes brittle, the mortise and tenon joints are easy to break during the production of wood products, and the utilization rate of wood is low. However, when treated at a lower temperature of about 190°C, the loss of flexural strength of wood is small , but the color of the wood is lighter, and the improvement of dimensional stability and corrosion resistance is not as good as that of the treated wood above 200 °C

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