JPH03183502A - Treatment method of lumber - Google Patents

Abstract

PURPOSE:To make a treatment time short and infiltration of a chemical agent into lumber deep, by a method wherein a fine hole having a specific opening area is bored into the surface of lumber and then an insecticide and/or a treatment solution of a germicide for the lumber containing a specific organic solvent is infiltrated into the lumber. CONSTITUTION:A fine hole having an opening part area of 2.5-15mm<2> and a depth of 3-15mm is bored into the surface of lumber and then an insecticide and/or a treatment solution of a germicide for the lumber containing at least a 10wt.% organic solvent whose boiling point is at least 200 deg.C is infiltrated into the lumber. It is preferable to bore a fine hole having the opening part into the surface of the lumber by compressing the surface of the lumber by making use, for example, of a circular or square steel material having the opening part area. It is preferable that the treatment solution to be used contains both the insecticide and germicide, ordinarily the insecticide and germicide are contained respectively 0.01-10wt.%, preferably they are contained so as to fall within a range of 0.1-5.0wt. %. Furthermore, the treatment solution contains a high-boiling-point organic solvent, whose boiling point is at least 200 deg.C, at least 10wt.%, preferably at least 50wt.%.

Description

[Detailed Description of the Invention] Industry - Part 1 - Group 111 - Field - The present invention relates to a method for treating wood, and more particularly, to a method for treating wood that can deeply penetrate the wood with an insecticide and/or fungicide. Concerning high-productivity wood processing methods.

In recent years, the demand for lumber in Japan has increased significantly, leading to the depletion of domestic forest resources, and with the increase in imported materials with poor durability such as South Sea lumber, it has become increasingly susceptible to termites, wood beetles, etc. Biological damage is increasing. Additionally, changes in construction methods are creating an environment where wood is more likely to rot and termite damage occurs.

Therefore, in order to protect wood from the biological deterioration described above, on the one hand, various wood treatment methods such as insizing have been known, and on the other hand, various wood preservation agents have been developed. .

” The insizing method is also called chiseling, and is a method in which chisels are cut into the surface of the wood at appropriate intervals with a chisel blade as a pretreatment for wood preservative treatment.As a wood treatment method, A well-known method is to inject an aqueous preservative under pressure after this preprocessing. However, with this method, not only does it take time to inject the preservative into the wood, but it also takes time for the preservative to settle, resulting in poor productivity and limited wood types. From the viewpoint of stability, it is difficult to apply this method to so-called pre-cut materials. In addition, the chemicals are highly toxic and corrosive and may cause environmental pollution, and the equipment used is also large and expensive.

On the other hand, oily preservatives such as creosote oil are also known as preservatives. Conventionally, this preservative has been widely used for utility poles, sleepers, etc., but sufficient effects cannot be obtained simply by coating or spraying, so it is necessary to heat the preservative and impregnate it. Furthermore, the anti-termite power is insufficient.

For this purpose, oily preservatives and termiticides are also known, such as those described in JP-A-61-64403.

Although this oily preservative and termiticide is effective in preserving wood,
Until now, a construction method with excellent productivity had not been found,
It is mainly applied to the underfloor areas of new or existing buildings by brushing or spraying, and is low in productivity. Furthermore, due to the construction method described above, leakage during construction is likely to occur at joints and the like.

A double vacuum method is also known for applying oily preservatives to wood. According to this method, the chemical can be penetrated into the wood well, but it still requires relatively large and expensive equipment, even if it is not as large as the pressure injection method.

The present invention was made in order to solve the problems in conventional wood processing methods, and it is possible to shorten the processing time and deepen the penetration of chemicals into the wood. ,
The purpose of the present invention is to provide a method for treating wood that can be applied regardless of the species or shape of the wood.

The method for treating wood according to the present invention involves drilling microholes with an opening area of 2.5 to 15 m and a depth of 3 to 15 m on the surface of the wood. Next, the wood is impregnated with a wood insecticide and/or fungicide treatment solution containing 10% by weight or more of an organic solvent with a boiling point of 200''C or more.

According to the method of the present invention, first, microholes with an opening area of 2.5 to 15 Wl-2 and a depth of 3 to 15 mm are bored in the surface of the wood.

Conventionally, the chisel used in the generally known insizing method causes the openings of the wood surface to be closed after the chisel is removed, so in the method of the present invention, for example, It is preferable to use a circular or rectangular steel material having an opening area and compress the wood surface to form microholes having the above-mentioned openings in the wood surface.

In the method of the present invention, the cross-sectional shape of the micropores is not limited in any way, but if the opening area is too small, the penetration of the drug into the wood will be insufficient, and if the opening area is too deep, the penetration of the drug into the wood will be insufficient. , reducing wood strength. In addition, the density of micropores varies depending on the size of the micropores, the type of chemical, etc., and can be calculated by dividing the amount of chemical to be applied per unit of wood by the surface area of the wood. , 2000 to 7000 pieces/bo, more preferably 30
It is in the range of 00 to 5000 pieces/bo.

The treatment solution used in the method of the present invention is a solution prepared by dissolving a wood insecticide and/or fungicide as a chemical in an organic solvent, and this treatment solution contains 10% by weight of an organic solvent at a temperature of 200°C or higher. Contains or more.

The drugs include insecticides such as organophosphorus insecticides, carbamate insecticides, and pyrethroid insecticides, as well as anti-wood rotting fungi,
That is, a bactericide against Ascomycetes, Basidiomycetes, and Deuteromycetes is used.

The above-mentioned insecticides are preferably those effective as termite control agents, and specific examples include, for example, organophosphorus insecticides such as 02O-diethyl (α-cyanobenzylidene) oxyphosphorothioate (phoxim).
, O,O-diethyl-0-3,5,6-1-dichloro-
Carbamate insecticides such as 2-pyridylphosphorothioate (chlorpyrifos) include 0-see, -butylphenylmethyl carbamate (Bassa), and 0-isopropoxyphenylmethyl carbamate (Propoxa).
etc., and as a pyrethroid insecticide, cyano (
4-Fluoro-3-phenoxyphenyl)methyl-3-
(2,2-dichloroethynyl)-2,2-dimethylcyclopropanecarboxylic acid ester (Cyfulswan), (
IR)-cis-3-(2,2 dibromovinyl)-2,2
-dimethylcyclopropanecarboxylic acid ester (deltamethrin) and the like.

Specific examples of the fungicide include N-cyclohexyl-N-methoxy-2,5-dimethylfuran-3-carboxamide (flumecyclox), N-nitroso-N-cyclohexylhydroxylamine, aluminum, potassium or copper salts, N,N-dimethyl-No.
-(dichlorofluoromethylthio)-No-phenylsulfamide (dichlorfluanid), p-chlorophenyl 3-iodopropargyl formal, 3-bromo-2
, 3-short-2-propenylethyl carbonate, and the like.

In the present invention, the treatment solution used preferably contains both the above-mentioned insecticide and fungicide, and usually the insecticide and fungicide are each contained in an amount of 0.01 to 10% by weight, preferably, The content ranges from 0.1 to 5.0% by weight, respectively.

Furthermore, the treatment solution contains a high boiling point organic solvent having a boiling point of 200"C or higher, at least 10% by weight, preferably at least 50% by weight. Such high boiling point organic solvents are usually petroleum fractions, catalytic cracking, etc. Oil fractions or synthetic oils that are liquid at room temperature and mainly consist of aromatic components are preferably used.

Examples of such aromatic components include polyalkylbenzenes such as monoalkylbenzenes, dialkylbenzenes, trialkylbenzenes, and tetraalkylbenzenes;
Examples include polyalkylnaphthalenes such as monoalkylnaphthalene and dialkylnaphthalene, diphenyl, alkyldiphenyl, diphenyl ether, and alkyldiphenyl ether.

Further, as the above-mentioned high boiling point organic solvent, for example, esters such as dimethyl maleate and dibutyl phthalate, molar alkyl esters and monoalkyl ethers such as ethylene glycol, diethylene glycol, and triethylene glycol can also be used. Furthermore, the treatment solution may contain an antioxidant and an ultraviolet absorber, if necessary, in addition to the drug and the solvent.

In the present invention, in order to impregnate the wood with the treatment solution, for example, a spray method or a flow-down method is adopted, and the spray method is particularly preferable from the viewpoint of treatment efficiency.

As described above, according to the method of the present invention, micropores having openings are drilled in advance on the surface of wood, and a treatment solution containing a high boiling point solvent is applied to the wood.

Therefore, the processing solution is attracted to the micropores, and
Since it does not volatilize, the active ingredient easily penetrates deep into the wood through the micropores.

Furthermore, the method of the present invention is suitable for continuous treatment of wood, and can apply chemicals in a short time, regardless of the species or shape of the wood.

EXAMPLES The present invention will be described below with reference to Examples, but the present invention is not limited to these Examples in any way.

The treatment solution contained 1.0% by weight of phoxim as an active ingredient;
A containing 0.5% by weight of N-cyclohexyl-N-methoxy-2,5-dimethylfuran-3-carboxamide and 0.5% by weight of the aluminum salt of N-nitroso-N-cyclohexylhydroxylamine. , B and C
was prepared.

Processed orange box Δ Active ingredient 2. Owt% Petroleum solvent with boiling point 203-260°C and aromatic component content 99% 98.0wt% Treated tube Active ingredient 2.0wt% Above petroleum solvent 5.0wt% Toluene
93.0% by weight Treatment and Kaidan Active ingredients: 2.0% by weight Methanol 98.0% by weight Example 1 A 1m thick strip of 1/2 width on one surface of a piece of Japanese chestnut wood with a cross section of 10105x105 and a length of 200I11Ill. ,fhA5
Using a steel material of f1 m and length of 50 mm, the driving depth of the steel material was set to 711I+1, and insizing was performed at a pitch of 50 aa in the length direction and a pitch of 30 in the width direction to form microholes. The dimensions of the microhole are the same as those of the above-mentioned steel material, with an opening area of 1×5IIl-1 and a depth of 7I! 1ffi, and the length direction of the micropores is along the fiber direction of the wood4
For comparison, insizing was performed on another 1/2-width strip in the same manner as above, using only a double-edged tip end 5ITllll of the steel material.

The treatment solution A was sprayed onto the surface of each of the insizing-treated wood for 3 seconds at a spray rate of 11/min, and after being left at room temperature for 4 days, the depth of penetration of the chemical into the wood was measured. . For the measurement, the insizing part of the wood was cut in a plane perpendicular to the fiber direction, and a dye solution (1% Ceres Blue (manufactured by Bayer)) was applied to the insizing part of the wood, which had been confirmed to be compatible with the penetration depth of the chemical. The depth of penetration of the chemical into the wood was determined.

As a result, the penetration depth of the chemical into the wood was 5.61 for the grained wood part, based on the average value of 6 points for each point!
lff1, but in the processing part according to the present invention, 11.
It was 1 mm.

Example 2 The same method as in Example 1 was applied to one surface of a piece of Japanese chestnut wood with a cross section of 10105X)05 and a length of 200 mm, with a thickness of 1 mark and a width of 5! Ml
Using a steel material with a length of 50 m, the driving depth was set to 7 mm, and the insizing process was performed at a pitch of 50 m in the length direction and a pitch of 30 m in the width direction, so that the length direction was along the fiber direction of the wood. ), a microhole was drilled.

The surface of the insizing-treated wood was divided into three sections, and each section was sprayed with the treatment solution A, B, or C for 3 seconds at a spray rate of IF/min, and left at room temperature for 4 days. Afterwards, the depth of penetration of the chemical into the wood was measured in the same manner as above.

As a result, the penetration depth of the chemical into the wood was 11.5 mm for treatment solution A, 8.1 mm for treatment solution B, and 7 mm for treatment solution C, as the average value of the four points.
．． It was 5 loaves.

Claims (1)

[Claims] Micropores with an opening area of 2.5 to 15 mm^2 and a depth of 3 to 15 mm are drilled on the surface of the wood, and then the boiling point is 20 mm.
A method for treating wood, which comprises impregnating the wood with a wood insecticide and/or fungicide treatment solution containing 10% by weight or more of an organic solvent at 0° C. or higher.