JPS63260403A - Method of treating wood - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method for treating logs, and particularly to a method for simultaneously performing dehydration and penetrating treatment such as preservative treatment.

(Prior art) Wood has been used as a building and structural material for a long time, but
In recent years, its quality has been rediscovered, and wooden houses and appliances are being honored with awards. However, in order to make it durable for a long period of time, it is necessary to carry out a sufficient drying process, and in the case of natural drying, drying for several years is sometimes necessary.

In order to shorten this drying period, heating, depressurization, etc. are used, but the forced drying method not only requires large-scale equipment, but also causes many cracks, which may reduce the quality of the wood. There were many.

Furthermore, in order to increase the durability of wood, various treatments are required, such as injection of preservatives, coating with creosote, paint, etc., or burning and carbonizing the surface.

These drying and preservative treatments are performed in separate processes, which takes time and causes an increase in equipment costs and other lumber costs.

(Problems to be Solved by the Invention) This invention provides a wood processing method that performs the above-mentioned dehydration and preservative treatment in one step, takes a short processing time, and does not cause deterioration in quality due to cracks, etc. It is an attempt to obtain.

(Means for Solving the Problems) The wood processing method of the present invention is characterized by immersing felled logs in petroleum crude oil, dehydrating and drying them, and impregnating them with crude oil components. As mentioned above, petroleum crude oil contains not only various liquid hydrocarbons but also solid hydrocarbons such as paraffin and asphalt, and inorganic compounds such as calcium and sulfur.

When logs are immersed in this solution, low-boiling components first penetrate into the wood through capillary action due to interaction with lipophilic substances in the wood, replacing water and dehydrating the wood, followed by high-boiling components. It is imagined that As a result, sufficient dehydration is achieved in an extremely short period of time. Furthermore, this dehydration process does not involve drying that would cause shrinkage of the wood components, but replaces moisture, so problems such as cracking do not occur.

Additionally, wood treated using this method.

It does not absorb moisture even when exposed to the atmosphere, and since it contains sulfur compounds that have a bactericidal effect, it prevents the growth of putrefying bacteria and produces the same effect as antiseptic treatment.

(Examples) Example 1 A felled cedar log was immersed in petroleum crude oil with the bark still attached, and left for about one year. The tree was pulled up, the bark was stripped, and the wood was sawn, but no cracks due to dehydration could be observed in the wood. In addition, the sulfur compound hardens the material and gives it a purple coloring effect, making it possible to obtain a hard and luxurious wood. The lumber thus obtained was left in the open air for about two years, but no cracks, bends, or other irregularities occurred, and no progress of corrosion was observed in the ground-contacting parts.

Additionally, it was impossible to bond this wood with wood glue, indicating that the hydrocarbon component had sufficiently penetrated the wood.

The bark allows penetrating components in crude oil to pass through, but impurities, especially solid particles, do not pass through the bark, so if you soak the wood with the bark still attached, you can obtain wood with a beautiful surface by pulling it out and peeling it off. I can do it.

Example 2 A lauan material with a diameter of about 60 mm was immersed in crude oil heated to about 45° C. and dehydrated for about 2 days. They were pulled up and sawn into lumber, but despite the short soaking period of about two days, they were completely dehydrated and penetrated with crude oil components, down to the core. According to other examples.

After about 20 hours of immersion, penetration of about 10 slags in the radial direction was observed, indicating that an increase in crude oil temperature enables extremely short treatment times.

In this case, the higher the temperature, the faster the dehydration and penetration.

Steam from components in crude oil that evaporate at low temperatures is generated, causing health problems.
There is a natural upper limit because of fire safety issues.

(Effects of the Invention) As described above, this invention not only dehydrates the logs in a short time of just a few minutes, but also preservatives them by simply immersing the logs in petroleum crude oil without any treatment. The dehydration process can be completed in an extremely short time, especially when heating crude oil, and there are no problems such as cracking. Therefore, it is possible to obtain an economically superior wood treatment method at an extremely low cost. It was completed.

The lumber obtained by sawing the wood obtained in this way does not have any defects such as cracking, warping, or bending, and is also highly effective against insects, which is extremely effective compared to conventional treatments. It is something to play.

Patent applicant: Four pots - Applicant's agent: Patent attorney Fumio Sato (2 others)

Claims (1)

[Claims] (1) A wood processing method characterized by immersing felled logs in petroleum crude oil and subjecting them to dehydration and infiltration treatment. (2) A method of treating wood that is characterized by heating crude oil to 40°C or higher and immersing the log in it. A method for treating wood according to claim 1, characterized by: