Wood treating method

Drying and gas or vapor contact with solids – Process – With contacting of material treated with solid or liquid agent

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Details

34351, 34415, 8402, F26B 300

Patent

active

054856850

ABSTRACT:
There are available as chlorine base organic solvents for cleaning by vapor-defatting methylene chloride (CH.sub.2 Cl.sub.2), trichloro ethylene (CHCl.dbd.CCl.sub.2), perchloroethylene (CCl.sub.2 .dbd.CCl.sub.2), 1,1,1-trichloroethane (CH.sub.3 CCl.sub.3) and flon 113 (CCl.sub.2 FCClF.sub.2), etc., of which mainly used is a methylene chloride (CH.sub.2 Cl.sub.2) solvent. By vaporizing said methylene chloride solvent and permeating its vapor into the wood to be treated 10, to melt the tough lignin in the cell structure, thereby perforating the cell membranes, and undermine the valve action of portholes of the false vessels or vessels, fleeing of the cell water confined inside the cells and lumens is facilitated through said perforations and the porthole valves. By perforating the cells and undermining the valve action of the portholes, the fleeing of the free water confined therein, when drying the treated wood by hot air or sun's heat, is facilitated, for the benefit of very rapid drying. Besides, easy penetration of fine dye grains into the wood through said perforations and portholes enables its coloration to deep layers of wood.

REFERENCES:
patent: 2435219 (1947-09-01), Hudson
patent: 2650885 (1950-06-01), Hudson
patent: 3900615 (1975-07-01), Dunn, Jr.
patent: 3948802 (1976-04-01), Lidell
patent: 3959529 (1976-05-01), Winn et al.
patent: 3967011 (1976-06-01), Dunn, Jr. et al.
patent: 4567115 (1986-01-01), Trumble

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