Heat-treated wood

What is heat treatment? To obtain high-quality lumber wood must be dried. Until the mid 1990's the most advanced technology is a high drying at a temperature of 100 - 150 degrees Celsius. In 1997, one of the woodworking factories in Finland, Mikkeli introduced a new technology that has been called. For a given technological process of drying is carried out at a temperature of 150 - 230 degrees. The higher the temperature, the greater the weight loss due to evaporation of volatile compounds (in other words, the tree becomes easier). The greater weight loss, the less water remains in the wood. Depending on the conditions of heat treatment and wood residual moisture content of 40 - 60% less than that dried in the usual way. The process of treatment usually lasts about 24 hours. Moisture content of wood after heat treatment is reduced by 80 - 90%. As a consequence, significantly reduced its heat: heat-treated wood is heated much less raw, coming on this indicator to Abashev. The surface of the heat-treated wood is not porous and dense, which reduces the ability of wood to absorb moisture from the air (30% - 90% depending on the temperature and drying time). In practice this means that the tree is able to repel water without additional treatment with special impregnation. Thermal treatment decomposed wood sugar, is a breeding ground for microorganisms that contribute to rotting wood. It is extremely resistant to decay, approaching this indicator to the larch, and, consequently, hygienic material. It should be emphasized that the conifer tree is almost completely lost the resin, while maintaining excellent flavor, growing at high humidity and air temperature. Heat treatment changes the color of the wood, getting a nice brown. It should be noted that the change in color - the composite, which is clearly visible on the cut. Scratches on such a surface is almost imperceptible. By changing the temperature of heat treatment can achieve the desired shade of wood and / or degree of resistance to environmental conditions. Where is heat-treated wood? Thanks to the beautiful appearance and unique properties of heat-treated wood can be used in many fields, including interior sauna, outdoor cladding of buildings, floor construction, as parquet and plank, making garden furniture, boats, musical instruments, etc. n. From the standpoint of planetary ecology as the material for the shelves in the sauna and steam bath heat-treated wood (including conifers) is a worthy alternative to the traditional Abashev-Sambo, which grows only in the equatorial evergreen, so-called forest - the main source of oxygen in Earth's atmosphere that can not be restored. "What happens to a tree during the heat treatment? resin dries up or completely isparaetsya. the color becomes darker. Thermal conductivity of 0-30% Surface strength increases. The ability to absorb moisture is reduced. Bakteriostoykost increases. neblagopryatnyh sensitivity to environmental conditions reduces the tendency to deformation of 30-90% lower compared with the untreated. Carrying humidity of 10-50% compared with the untreated. Varies cellular structure of wood, becoming the same as if the tree is dried for several hundred years.