Method for preparing fire retardant modification timber

Abstract

The invention discloses a method for preparing a fire retardant modification timber. The method comprises the following steps of: (1) adding a fire retardant into a urea formaldehyde resin concentrate to obtain a timber impregnation liquid after the fire retardant is completely dissolved; (2) making the impregnation treatment of the timber to be treated by using the vacuum pressure method and the timber impregnation liquid obtained in the step (1); and (3) drying the timber to be treated to obtain the fire retardant modification timber. In the method, the fire retardant is directly added into the urea formaldehyde resin concentrate to form the impregnation liquid, so that by one-time impregnation treatment, the use performance of the timber is improved, the fire retardant effect is enhanced, the process for modifying the timber is simplified, and other steps which are needed after the timber modification to realize the fire retardant function are saved. The method has the advantages of simple process and unnecessary complex equipment; and when the method is adopted to treat the timber, the size stability of the treated timber is obviously improved, the physical and mechanical properties are obviously improved, the weight gain rate of the timber is between 25 and 50 percent, and the oxygen index is increased by 40 to 80 percent.

Description

technical field [0001] The invention relates to a method for modifying wood, in particular to a method for preparing flame-retardant modified wood, and belongs to the field of chemical modification of wood. Background technique [0002] Wood is closely related to people's daily life. Chemical modification of wood is an effective way to improve the natural defects of plantation wood and low-grade wood. The density, surface hardness, wear resistance and dimensional stability of wood after treatment are greatly improved. At present, my country has extensively carried out research on the strengthening technology of fast-growing wood. [0003] As people's requirements for wood quality are getting higher and more comprehensive, multi-functional wood modification technology is also the main direction of wood modification development, not only to improve material properties, but also to make wood have anti-corrosion properties and flame retardant properties. Environmental protectio...

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to overcome the problem that the flame retardant is easily lost inside the wood, resulting in the flammability of the modified wood, and to provide a new preparation method of the flame retardant modified wood, which can be processed by one-time impregnation. To improve the use performance of wood and excellent flame retardant effect, simplify the process of modified wood, the dimensional stability and mechanical properties of modified wood are significantly improved, and at the same time, it can keep the fire retardant performance of wood for a long time