Shaped body made of impregnated wood

Details Shaped body made of impregnated wood Shaped body made of impregnated wood

B - Operations, Transporting

27

K

B27K 3/34 (2006.01) B27K 3/08 (2006.01) B27K 3/15 (2006.01) B27K 3/36 (2006.01) B27K 3/50 (2006.01)

Patent

CA 2249273

The invention concerns a shaped body made of wood which is impregnated with a biodegradable polymer and/or solid natural resin or drying (setting) oil. Wax, fats, salts and/or flame-retardants can also be added to the impregnating agent. The shaped body is pre-heated to a temperature of between 100 and 150 ~C, optionally placed under vacuum, and immersed in a melt of the impregnating composition. The shaped body remains in this melt - preferably at an excess pressure of between 3 and 20 bar, in particular between 8 and 12 bar - for between 15 and 120 minutes, preferably for between 30 and 90 minutes. The shaped body is then removed from the melt and any remaining melt is eliminated from the surface of the shaped body which is finally cooled.

Selon l'invention, un corps formé en bois est imprégné d'un polymère biodégradable et/ou d'une résine naturelle solide, ou bien d'une huile siccative (durcissante). Des cires, des graisses, des sels et/ou des agents ignifugeants peuvent être ajoutés à la substance d'imprégnation. Le corps formé est préchauffé à une température de 100-150 ·C, éventuellement mis sous vide et plongé dans une masse fondue constituée de la composition d'imprégnation, où elle reste, de préférence sous une surpression de 3-20, en particulier de 8-12 bars, pendant 15-120, de préférence 30-90 minutes. Le corps formé est ensuite retiré de la matière en fusion, sa surface est libérée de ladite matière, puis il est refroidi.

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