B - Operations – Transporting – 27 – K
Patent
B - Operations, Transporting
27
K
B27K 5/02 (2006.01)
Patent
CA 2371433
The invention relates to a method for adjusting the quality factors of the surface of a piece of wood, so that the effective period of hydrogen peroxide, from its application onto the wood surface to its evaporation therefrom is less than 5 minutes, advantageously less than 1 minute. In the method onto the surface of the piece of wood, with a temperature near room temperature or lower, there is fed hydrogen peroxide as spray, the pH of the initial solution of said spray being neutral or acidic. The hydrogen peroxide is allowed to affect the wood surface about 1-60 seconds, advantageously about 1-30 seconds. Thereafter the hydrogen peroxide is activated by irradiating the surface of the piece of wood by a radiation source, so that at the end of the irradiation period, the wood surface temperature is 40-80 ~C. The power of the radiation source is 20-500 kW, advantageously 50-200 kW per surface m2 of the piece of wood.
L'invention concerne un procédé d'ajustement des facteurs de qualité de la surface d'un morceau de bois, de manière que la durée d'efficacité du peroxyde d'hydrogène, de son application sur la surface du bois à son évaporation, soit de moins de 5 minutes et, de préférence, de moins d'1 minute. Ce procédé consiste à vaporiser du peroxyde d'hydrogène sur la surface du morceau de bois à une température proche de la température ambiante ou inférieure, le pH de la solution initiale vaporisée étant neutre ou acide. Le peroxyde d'hydrogène peut affecter la surface du bois de 1 à 60 secondes environ et, de préférence, de 1 à 30 secondes. Le peroxyde d'hydrogène est ensuite activé par irradiation de la surface du morceau de bois par une source de radiation, de manière qu'à la fin de la période d'irradiation, la température de la surface du bois atteigne 40 à 80 ·C. La puissance de la source de radiation est de 20 à 500 kW et, de préférence, de 50 à 200 kW par m?2¿ de la surface du morceau de bois.
Altonic Oy
Malvaranta Pertti Tapani
Shapiro Cohen
LandOfFree
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