Green mildew-proof treatment method for wood

Abstract

Belonging to the technical field of mildew proofing of wood, the invention relates to a green mildew-proof treatment method for wood. The mildew-proof treatment method is carried out according to the steps of: taking water vapor as the heating medium, introducing carbon dioxide at the same time, discharging air in a treatment tank to less than 5%, raising the temperature rapidly to 100-120DEG C, maintaining the pressure at 0.5-1MPa, and conducting heat preservation for 2-4h; further introducing water vapor, conducting air compressor pressurization, introducing carbon dioxide, performing heating to 120DEG C-150DEG C, maintaining the pressure at 1-3MPa, and conducting heat preservation for 4-8h; further introducing water vapor and carbon dioxide, maintaining the temperature at 120-150DEG C and the pressure at 1-2MPa, and performing drying to a water content of less than 5%; stopping introducing carbon dioxide, conducting spray cooling to less than 90DEG C, adjusting the humidity, and conducting natural cooling to obtain a wood moisture content of 4-8%. The method provided by the invention adopts synchronization of water vapor cooking and carbon dioxide extraction treatment, and has the advantages of green and environmental protection, safety and no harm, and good long-term mildew-proof effect, and can be used for preparing wooden toys for children, and home life articles for infants and children, etc.

Description

technical field [0001] The invention belongs to the technical field of anti-mildew wood and relates to a green anti-mold treatment method for wood by water steam cooking and carbon dioxide leaching. Background technique [0002] As we all know, rubberwood, sweetgum, pine and other woods are prone to mildew and discoloration in humid environments due to their own moisture-absorbing internal structure or rich nutrients and volatile organic compounds, which affect subsequent processing and utilization. . For example, rubber wood is a loose-porous wood with shrinkage, easy processing, and low price. It is a high-quality wood for making furniture and toys. However, because it contains about 1% protein and 3% starch and other nutrients, it is very easy to dry in a humid environment. Mildew occurs. CN102265902A discloses a patented technology of "a kind of antifungal agent for rubber wood and its application", which is to pretreat with sodium alkylnaphthoate solution, and then us...

AI Technical Summary

Problems solved by technology

CN103707375A discloses "a treatment method for solid wood anti-mildew", which adopts four steps of solid wood drying, constant temperature, dehumidification, and surface secondary spraying and varnishing to carry out anti-mold treatment on solid wood. The difference between patented solid wood drying and ordinary wood drying It uses steam to adjust the temperature and humidity of the drying room at regular intervals, and the maximum temperature rises to 85°C, which is not good for the anti-mildew effect on solid wood; the constant temperature and dehumidification steps are mainly to control the moisture content of solid wood; the surface is sprayed and painted twice It belongs to the follow-up processing process of solid wood, and as a pretreatment process of solid wood, it will affect the subsequent use of solid wood

Early antifungal agents such as boron-phenol mixtures used in wood preservation in the prior art, low-toxic industrial fungicides, and low-toxicity and high-efficiency organic chemical reagent antifungal agents all have certain toxicity and are harmful to the human body. The antifungal agent cannot meet the safety and harmless requirements of the wooden toy industry, etc.

The joint treatment of solid wood drying and surface spraying and varnishing restricts the use of wood and brings inconvenience to the subsequent application of wood