JP5202840B2 - Method for preserving wood-based materials - Google Patents

Description

  The present invention relates to a method for preserving a wood-based material that can be adapted to the degree of infiltration defined in the preservative treatment K3 of the Japanese Agricultural Standard (hereinafter referred to as “JAS”) for coniferous structural lumber.

  Conventionally, in order to obtain a degree of infiltration equivalent to the JAS preservation process K3, a water-soluble drug pressure injection method has been performed. In this water-soluble drug pressure injection method, water is used as a solvent, so that the wood product into which the water-soluble drug is injected has a problem that the moisture content is increased and the dimensions of the wood are changed.

In addition, the surface of the wood is compressed with a steel material with a flat surface having an opening area of 2.5 to 15 mm ² at the tip, and a microhole having a depth of 3 to 15 mm is formed on the surface of the wood with the above opening area. And then, a technique for impregnating the wood with an insecticide and / or disinfectant treatment solution containing 10% by weight or more of an organic solvent having a boiling point of 200 ° C. or higher (see Patent Document 1). ing. An attempt was made to apply this technique to lumber to obtain quality equivalent to JAS preservation process K3. However, this technique requires a specially shaped stab, requires a special composition for the oil, and requires a large amount of organic solvent to obtain the prescribed infiltration. Therefore, there has been a problem that the processing cost is high and the practicality is poor.

Also, wood such as bay pine in a chemical injection container filled with an aqueous chemical containing quaternary ammonium salt having antibacterial activity against difficult-to-inject tree species such as pine and polyalkylene glycol and having a pH of 8 or less. After inserting the piece, the first step of reducing the pressure in the chemical injection container to 0.08 MPa and holding it for at least 30 minutes, and pressurizing the pressure in the chemical injection container to 1.2 MPa and holding it for at least 2 hours. A technique (see Patent Document 2) in which an aqueous chemical solution is injected into wood such as bay pine by combining pressure impregnation means including two steps has been proposed. However, this technique also uses water as a solvent, so that the aqueous chemical solution is injected into wood such as bay pine in a state where the aqueous chemical solution is filled, and a large amount of aqueous chemical solution is required. In addition to the disadvantage that the dimensions of the wood change, there is a problem that the processing cost becomes high.
Japanese Patent Laid-Open No. 11-156812 Japanese Patent No. 2764112

  The present invention aims to solve this problem.

  That is, the present invention uses a small amount of wood preservative solution that retains the wood preservative solution on the surface of the woody material, satisfies the invasion degree standard defined in K3 of JAS, and has little dimensional change. An object of the present invention is to provide a method for preserving a wood-based material as a base material at low cost.

According to the first aspect of the present invention, (i) a wood preserving chemical solution is applied to the surface of a wood-based material by applying a wood preserving chemical solution to the surface of the wood-based material provided with a dent due to insizing on the surface. (B) placing the wood-based material holding the wood preservative chemical solution on the surface of the wood-based material in a sealed container; (c) subjecting the wood-based material to air pressure treatment in the sealed container. Subsequently, a step of applying a decompression process, and (d) sequentially returning the wood-based material subjected to the decompression process to atmospheric pressure and greatly infiltrating the wood preservation chemical into the wood-based material. A method for preserving wood-based material, wherein the wood preservative comprises a wood preservative and an organic solvent that dissolves the wood preservative, and the wood preservative comprises cyproconazole, tebuconazole, propico Nazole, 3 At least one preservative selected from iodo-2-propynylbutyl carbamate, quaternary ammonium salt, copper compound, and zinc compound, or at least selected from etofenprox, imidacloprid, clothianidin, thiamethoxam, and bifenthrin Class 4 second petroleum, Class 4 third petroleum, which is one kind of termite-proofing agent, and the organic solvent hardly contains vegetable oil and / or toluene, styrene, xylene, paradichlorobenzene, and formaldehyde A method for preserving a wood-based material, characterized in that it is composed of Type 4 and Type 4 petroleums.

The invention described in claim 2 is the invention described in claim 1, wherein the degree of decompression in the decompression process is 50 kPa or more, and the pressure of air pressurization in the air pressurization process is 50 kPa or more. It is characterized by being.

The invention described in claim 3 is the invention described in claim 1 or 2 , wherein the dent caused by the stab (insizing) is retained, and the wood preserving chemical solution is maintained at 100 g / m ² per 1 m ² surface area of the woody material. It is characterized by having a gap that can be formed.

The invention described in claim 4 is the invention described in any one of claims 1 to 3 , wherein the amount of the wood preserving chemical solution retained on the surface of the wood-based material is 500 g / m ² or less. it is characterized in that a.

According to the present invention described in claim 1, (b) a step of applying a wood preserving chemical to the surface of the wood-based material to hold the wood preserving chemical on the surface of the wooden material, (b) the wood-based material A step of placing a wood-based material holding a wood preservative chemical solution on the surface thereof in a sealed container, (c) a step of subjecting the wood-based material to air pressure treatment in the sealed container, followed by a pressure reduction treatment, And (d) a method for preserving a wood-based material, which sequentially comprises: a step of returning the wood-based material subjected to the decompression treatment to atmospheric pressure and greatly infiltrating the wood-preserving chemical into the wood-based material. The wood preservative comprises a wood preservative and an organic solvent that dissolves the wood preservative, and the wood preservative comprises cyproconazole, tebuconazole, propiconazole, 3-iodo-2- Propynyl butylcarba Or at least one antiseptic selected from etofenprox, imidacloprid, clothianidin, thiamethoxam, and bifenthrin. And the organic solvent contains almost no vegetable oil and / or toluene, styrene, xylene, paradichlorobenzene, formaldehyde, the fourth class second petroleum, the fourth class third petroleum, or the fourth class fourth petroleum. (A) Using a small amount of wood preservative solution that holds the wood preservative solution over the entire surface of the woody material, satisfying the invasion degree standard defined in K3 of JAS (B) a small amount of wood-based material can be absorbed. Even if it is a quantity, it can exhibit an excellent antiseptic or ant-proof effect, and (c) does not swell the woody material even if it is absorbed by the woody material, and the danger of volatile components Therefore, it is possible to provide a method for preserving wood-based materials with low cost at a low cost. Furthermore, since the wood-based material is a wood-based material having a dent due to stab (insizing) on the surface, the wood-preserving chemical solution is liable to infiltrate the wood-based material.

According to the second aspect of the present invention, since the pressure of air pressurization in the air pressurization process is set to 50 KPa or more, and the degree of vacuum in the pressure reduction process is set to 50 kPa or more, the dimensional change is further reduced. It can be a wood-based material.

According to the third aspect of the present invention, since the dent due to the stab (insizing) has a gap capable of holding the wood preserving chemical solution at 100 g / m ² or more per 1 m ² of the surface area of the wooden material, Wood preservatives are more likely to infiltrate wood-based materials.

According to the present invention described in claim 4 , since the amount of the wood preserving chemical retained on the surface of the wood-based material is 500 g / m ² or less, it is required in the conventional pressure injection treatment. Amount,
In addition, it is possible to infiltrate the wood-based material into the woody material with an amount of the wood-preserving chemical that is smaller than the amount required by the method not according to the invention described in claim 1, thereby reducing the processing cost. be able to.

Storage processing method of the wood-based material according to the present invention, (b) allowing the surface to hold the wood preservation chemical woody woody material by applying a wood preservative chemical to the surface of the material, (ii) the wood-based material A step of placing a wood-based material holding a wood preservative on its surface in a sealed container; (c) a step of subjecting the wood-based material to air pressure treatment in the sealed container, followed by a pressure reduction treatment; and (D) a method of preserving a wood-based material , which sequentially comprises the step of returning the wood-based material subjected to the decompression treatment to atmospheric pressure and greatly advancing the infiltration of the wood-preserving chemical into the wood-based material. The wood preservative comprises a wood preservative and an organic solvent that dissolves the wood preservative, and the wood preservative comprises cyproconazole, tebuconazole, propiconazole, 3-iodo-2-propynyl. Butyl carbamate Or at least one antiseptic selected from etofenprox, imidacloprid, clothianidin, thiamethoxam, and bifenthrin. And the organic solvent contains almost no vegetable oil and / or toluene, styrene, xylene, paradichlorobenzene, formaldehyde, the fourth class second petroleum, the fourth class third petroleum, or the fourth class fourth petroleum. It consists of a kind.

  In the present invention, the wood-based material to be subjected to the preservation of wood is preferably a water-based material that is deteriorated by decaying fungi using wood such as lumber, laminated lumber, and LVL as long as it is not contrary to the object of the present invention. Other water quality materials may be used. These woody materials are preferably desiccants. The wood preservative solution is preferably applied by brush application, spray application, and immersion application, but may be applied by application means other than these unless it is contrary to the object of the present invention. It doesn't matter.

Thus, (b) a step of applying a wood preserving chemical to the surface of the wood-based material to hold the wood preserving chemical on the surface of the wooden material, and (b) holding the wood preserving chemical on the surface of the wooden material. (C) in the sealed container, air pressure treatment is performed on the wood material in the sealed container, followed by a decompression process; and (d) the decompression process. A method of preserving the wood-based material , comprising sequentially applying the wood-preserved material to atmospheric pressure to greatly advance the infiltration of the wood-preserving chemical into the wood-based material, A wood preservative and an organic solvent that dissolves the wood preservative, the wood preservative being cyproconazole, tebuconazole, propiconazole, 3-iodo-2-propynylbutylcarbamate, quaternary ammonium At least one preservative selected from copper compounds and zinc compounds, or at least one preservative selected from etofenprox, imidacloprid, clothianidin, thiamethoxam, and bifenthrin, and the organic When the solvent is composed of vegetable oil and / or class 4, type 2 petroleum, class 4 petroleum 3 or class 4 petroleum 4 containing almost no toluene, styrene, xylene, paradichlorobenzene or formaldehyde (A) By using a small amount of wood preservative solution that retains the wood preservative solution over the entire surface of the wood-based material, it is possible to satisfy the invasion standard defined in JAS K3 and almost all of the dimensional change. (B) excellent antisepticity even with a small amount of wood-based material absorption The preservation treatment of wood-based materials that can exhibit fruit or ant-proofing effects, and (c) does not swell the wood-based materials even when absorbed by the wood-based materials, and has a low risk of volatile components The method can be provided at low cost.

The degree of decompression in the decompression process is preferably 50 kPa or more, and the pressure of air pressurization in the air pressurization process is preferably 50 kPa or more. As described above, when the degree of decompression in the decompression process is 50 kPa or more and the pressure of air pressurization in the air pressurization process is 50 kPa or more, the wood preserving chemical solution is more likely to infiltrate the woody material. Become.

In the present invention, the wood preservative preferably comprises a wood preservative and an organic solvent that dissolves the wood preservative. As described above, when the wood preservative is composed of a wood preservative and an organic solvent that dissolves the wood preservative, the wood preservative more easily infiltrates into the woody material. It can be a wood-based material with less change.

  In the present invention, the wood preservative is preferably selected from cyproconazole, tebuconazole, propiconazole, 3-iodo-2-propynylbutyl carbamate, quaternary ammonium salt, copper compound, and zinc compound. At least one preservative, or at least one ant inhibitor selected from etofenprox, imidacloprid, clothianidin, and thiamethoxam. Thus, the wood preservative is at least one preservative selected from cyproconazole, tebuconazole, propiconazole, 3-iodo-2-propynylbutyl carbamate, didecyldimethylammonium chloride, copper compound, and zinc compound. Agent, or at least one ant protection agent selected from etofenprox, imidacloprid, clothianidin, thiamethoxam, and bifenthrin. The ant effect can be demonstrated.

  In the present invention, the organic solvent is preferably a fourth oil, a second oil, a fourth oil, a third oil or a fourth oil that contains almost no vegetable oil and / or toluene, styrene, xylene, paradichlorobenzene, or formaldehyde. It consists of 4th petroleum. Thus, since the organic solvent is composed of vegetable oil and / or fourth, second, or fourth, third petroleums that hardly contain toluene, styrene, xylene, paradichlorobenzene, and formaldehyde, Even if it is absorbed by the system material, the wood system material does not swell, and there is little risk of fire and volatile components.

In the present invention, the wood-based material is a wood-based material in which a dent due to stab (insizing) is provided on the surface . As described above, when the wood-based material is a wood-based material having a dent due to stab (insizing) on the surface , the wood preserving liquid easily infiltrates the wood-based material.

The indentation caused by the stab (insizing) is a spindle shape with a cross section of the blade root of 3 mm × 13 mm and a wedge-shaped tip with a depth of 10 mm (“A type”) and from the blade root to the blade tip. It is formed using a rectangle having a cross section of 1 mm × 13 mm and a depth of 10 mm (“B type”).

In the present invention, the dent due to the stab (insizing) is preferably provided with a gap capable of holding the wood preserving chemical solution at 100 g / m ² or more per 1 m ² of the surface area of the wooden material . Thus, if the dent due to the stab (insizing) has a gap capable of holding the wood preserving chemical solution at 100 g / m ² or more per 1 m ² of the surface area of the wooden material , the wood preserving chemical solution further infiltrates into the wooden material. It becomes easy to do.

In the present invention, the amount of the wood preserving chemical solution retained on the surface of the wood-based material is preferably 500 g / m ² or less. Thus, when the holding | maintenance amount of the wood preservation chemical | medical solution hold | maintained on the surface of the said wood type material shall be 500 g / m < ² > or less, the quantity required by the conventional pressurization injection process, and Claim 1 The wood-preserving chemical solution can be infiltrated into the woody material with an amount of the wood-preserving chemical solution that is smaller than the amount required by the method not according to the disclosed invention, and thus the processing cost can be reduced.

Example 1
After dividing the structural laminate without finger joints of 105 mm × 105 mm × 4 m in length, which is also used for ordinary residential buildings, into two in the length direction, and applying two different types of insizing for each of them, After cutting to a length of 30 cm, both ends were sealed with an epoxy resin to obtain a test material. The two types of insizing are a spindle shape with a cross section of 3 mm × 13 mm at the root of the blade and a wedge with a wedge shape at the tip (hereinafter referred to as “A type”) and from the root of the blade to the blade tip. A cross-section of 1 mm × 13 mm rectangle having a depth of 10 mm (hereinafter referred to as “B type”) was used. The number of blades was adjusted to be about 3500 per 1 m ² of the wood surface for all types. A type pushes and spreads a fiber and makes a hollow in the material surface, and B type cuts a fiber and makes a hole of the section of a blade. The drug solution includes cyproconazole 0.4%, etofenprox 0. 55% and a small amount of dissolution aid was used. Further, in order to easily identify the infiltrated portion of the chemical solution, a small amount (1% as zinc) of organic acid zinc dissolved in kerosene and colored red by application of a color indicator was added. Next, the following penetration enhancing operation was performed on the test material. That is, the chemical solution was applied to the test material so that the amount of the chemical solution retained in the test material was 200, 300, 400 g, and 500 g per square meter. Specifically, in the operation including air pressurization, the adhesion amount and the retention amount coincide with each other, but in the operation of only decompression, 8% of the chemical solution adhered during the operation drips into the sealed container, and the retention amount decreases. As a result, the amount of adhesion was adjusted to 217 g, 326 g, 435 g, and 543 g so that the final holding amount was equal, although only the operation of reducing pressure was performed. After leaving it for 1 hour, put it in a pressure vessel, apply 50 kPa air pressure for 30 minutes, return to room temperature and let stand for 30 minutes, then perform 50 kPa decompression for 30 minutes and then remove it from the pressure vessel The test material was left in the warehouse for 3 days. After cutting the central portion of the length of the test material thus obtained, a 0.1% dithizone / chloroform solution was sprayed on the cut surface, and the infiltrating portion was colored red to measure the degree of infiltration. The permeation enhancing operation was performed in six ways of operation numbers 1 to 6 shown in the following Table 1.

(Example 2)
For the 105 mm × 105 mm Batesga lumber having the A-type insizing, test materials were prepared in the same manner as in Example 1, and the chemicals retained in these test materials were finally 200 g, 400 g, and 500 g per square meter. It applied so that permeation enhancement operation was performed. Specifically, in the operation including air pressurization, the adhesion amount and the retention amount coincide with each other, but in the operation of only decompression, 8% of the chemical solution adhered during the operation drips into the sealed container, and the retention amount decreases. As a result, the amount of adhesion was adjusted to 217 g, 435 g, and 543 g, so that the final holding amount was the same, although only the operation under reduced pressure was performed. The conditions for the penetration enhancing operation of Example 2 are shown in Table 2 below. Moreover, about what performed the pressure reduction and / or air pressurization operation of Example 2, the infiltration degree was measured 3 days afterward.

(Comparative Example 1)
EXAMPLE 200 g / m ² the chemical to the test material of the test timber of chemical liquid not subjected to incising subjected to incising ones and types A and B was 100 g / m @ 2 applied as a comparative example of 1 ,, 300g / m ² , 400 g / m ² , and 500 g / m ² were stored at room temperature and cut at 3 days and 4 weeks, and the infiltration degree of the cross section was measured. The reason why the period until the infiltration degree is measured is longer than that in Example 1 because in the case of room temperature storage, the infiltration may gradually increase during storage.

(Comparative Example 2)
As a comparative example of Example 2, a test material was prepared in the same manner for a 105 mm × 105 mm cross-section of Batesga lumber with A-type insizing, and then a chemical solution was applied to 200 g, 400 g, and 500 g per square meter. The test material coated with this chemical solution was stored at room temperature, and the chemical solution infiltration degree of the sections cut on the third and fourth weeks was measured.

(Results of measurement of infiltration in Examples and Comparative Examples)
The effect was confirmed according to JAS. That is, the determination of the degree of infiltration in the JAS preservation process K3 is usually made according to this, since 80% or more of the portion 10 mm deep from the material surface on the cut surface is a pass criterion. In the determination, a case where the degree of infiltration was equal to or higher than the criterion was indicated as “◯”, and a case where the infiltration was below the criterion was indicated as “X”. The results of Example 1 are shown in Tables 3 and 4 below, and the results of Comparative Example 1 corresponding to Example 1 are shown in Table 5 below. The results of Example 2 and Comparative Example 2 corresponding thereto are shown in Table 6 below.

As described above, as shown in Tables 3, 4 and 6, in the method of storing treated wood coated with or preserving antiseptic / anticidal agents in Examples at room temperature as usual, the fourth week Only those with a chemical holding amount of 400 g / m ² or more pass, whereas this system, which combines air pressure treatment and pressure reduction treatment , passes on the third day even when the holding amount is 200 g / m ² . Has a tremendous effect. The solvent itself has no antiseptic / anticidal effect and is necessary only as an infiltrating material for the antiseptic / anticidal agent, and is preferably as small as possible in all respects. In addition, a short storage period during manufacture is also a great economic effect. Further, as is apparent from the examples, if this permeation enhancing operation is performed, it is not necessary to select the type of insizing tooth profile, and the holding amount may be maintained constant. Only drug solution holding amount of 100 g / m ² in the wood does not bite, but drug solution holding amount for good infiltration degree by this method, since approximately 200 g / m ² or more such, 100 g / m ² or more loadings increase You only have to make a sting. In addition, since the organic solvent is not naturally permeated for a long period of time, waste such as the selection of the viscosity and vapor pressure of the solvent and the addition of a penetration aid can be eliminated.

And, when the details of the present invention are described, although the effect required in the operation of reducing the pressure after application and returning to the atmospheric pressure can be obtained, there is a trouble of collecting the drug in the sealed container or collecting and reusing it in advance. Since there is a management complexity that requires a large amount to be dropped to the required holding amount, a method that combines air pressurization is a better method. The conditions under which pressure reduction and / or air pressure are applied are good in all the conditions of the examples, and thus there is no particular limitation, but the effect is demonstrated only by pressure reduction of 50 kPa or more, and air pressure of 50 to 200 kPa is applied. After the pressure is applied, the pressure is returned to the normal pressure, and then the pressure is reduced to 50 kPa or more and the pressure is returned to the atmospheric pressure. In addition to the above effects, there is an effect of preventing dripping of the chemical into the sealed container. can get.

Claims (4)

(B) A step of applying a wood preservative solution to the surface of a woody material having a dent due to stab (insizing) on the surface to hold the wood preservation solution on the surface of the woody material, (b) the woody material A step of placing a wood-based material holding a wood preservative chemical solution on the surface thereof in a sealed container, (c) a step of subjecting the wood-based material to air pressure treatment in the sealed container, followed by a pressure reduction treatment, And (d) returning the atmospheric pressure of the wood-based material subjected to the decompression treatment to greatly advance the infiltration of the wood preservative into the wood-based material,
A method for preserving wood-based materials having
The wood preservative is composed of a wood preservative and an organic solvent that dissolves the wood preservative,
The wood preservative is at least one preservative selected from cyproconazole, tebuconazole, propiconazole, 3-iodo-2-propynylbutyl carbamate, quaternary ammonium salt, copper compound and zinc compound, or , And at least one kind of anti-anticide selected from etofenprox, imidacloprid, clothianidin, thiamethoxam, and bifenthrin, and
The organic solvent is composed of vegetable oil and / or class 4, type 2 petroleum, class 4 type 3 petroleum or class 4 type 4 petroleum, which hardly contains toluene, styrene, xylene, paradichlorobenzene, and formaldehyde. A method for preserving a wood-based material, characterized by comprising: The method for preserving woody material according to claim 1, wherein a pressure of air pressurization in the air pressurization treatment is 50 kPa or more, and a degree of decompression in the decompression treatment is 50 kPa or more. The surface area of the wood-based material is 1m from the dent caused by the stab (insizing) ² Per 100g / m ² 3. The method for preserving a woody material according to claim 1 or 2, wherein the wood material has a gap that can be held as described above. The amount of wood preserving chemical solution retained on the surface of the woody material is 500 g / m. ² The method for preserving a wood-based material according to any one of claims 1 to 3, wherein: