JPH09277209A - Antiseptically and flame-resistingly treated wood and manufacture thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an antiseptically and flame-resistingly treated wood equipped with both rotproofness and flame proofness and its manufacturing method. SOLUTION: Antiseptic treatment and flame-resisting treatment are applied to wood by pouring an antiseptic and a flame retardant in the wood. The antiseptic is an antiseptic and insecticide having insecticidal effect as well as preservative effect. A pressure vessel, in which the wood is inserted, is evacuated and, after being introduced with the predetermined amount of the antiseptic, pressurized up to a predetermined pressure so as to pour the antiseptic under pressure in the wood and, after the discharge of the unnecessary portion of the antiseptic outside the pressure vessel, evacuated so as to remove the excess portion of the antiseptic and discharge the excess portion outside the pressure vessel. Then, after evacuating again, the pressure vessel is introduced with a predetermined amount of the flame retardant and then pressurized up to a predetermined pressure so as to pour the flame retardant under pressure in the wood and, after the discharge of the unnecessary portion of the flame retardant outside the pressure vessel, the wood is taken out of the pressure vessel and dried for flame-resistingly treated the wood after its antiseptic treatment.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to antiseptic / flame retardant treated wood obtained by subjecting wood to both antiseptic treatment and flame retardant treatment, and a method for producing the same.

[0002]

2. Description of the Related Art As is well known, wood has drawbacks such that it easily rots and burns easily. To overcome these drawbacks, for example, wood is treated with an antiseptic to improve its antiseptic property. Examples include preservative-treated wood that has been imparted, or flame-retarded wood that has been rendered flame-retardant by treating the wood with a flame retardant.

[0003]

However, the above-described antiseptic treated wood and flame retardant treated wood are separately used for applications requiring antiseptic properties and applications requiring antiseptic properties, All of them have a problem that they cannot be used in applications requiring both antiseptic properties and flame retardancy.

The present invention has been made in view of the above problems, and an object thereof is to provide antiseptic / flame retardant treated wood having both antiseptic and flame retardant properties and a method for producing the same. .

[0005]

[Means for Solving the Problems] First of all, the means of preservative / flame retardant treated wood for achieving the above object is as follows.
The preservative and flame-retardant treatment are performed by injecting wood with a preservative and a flame retardant. Secondly, the antiseptic agent is an antiseptic agent having an insecticidal effect in addition to the antiseptic effect.

[0006] Further, as a means for producing a preservative- and flame-retardant treated wood, wood is inserted into a pressure vessel to reduce the pressure, and then a predetermined amount of a preservative is introduced into the pressure vessel and then a predetermined pressure is applied. To pressurize and inject the preservative into the wood, discharge unnecessary components of the preservative out of the pressure vessel, depressurize the pressure vessel to remove excess preservative from the wood. The excess amount of the preservative is discharged from the pressure vessel to the outside of the pressure vessel, the inside of the pressure vessel is depressurized again, and then a predetermined amount of the flame retardant is introduced into the pressure vessel, and then the pressure is increased to a predetermined pressure so that the flame retardant is Injecting pressure into wood, discharging unnecessary parts of the flame retardant to the outside of the pressure vessel, and then taking out the wood from the pressure vessel and drying the wood, thereby preserving the wood and then performing flame retardant treatment. is there.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below. The antiseptic / flame retardant treated wood according to this embodiment is obtained by injecting an antiseptic agent and a flame retardant into wood to be antiseptic and flame retardant treated.

Examples of the wood include cedar, cypress and the like for conifers, and zelkova, persimmon, lauan and the like for hardwoods.

Examples of the preservatives include creosote oil, phenols / inorganic fluorides, organic tin compounds,
Examples include copper sulfate, copper sulfide, zinc chloride, mercuric chloride, organic mercuric agents, tar products and the like.

Examples of the flame retardant include halogen compounds and phosphorus compounds as organic flame retardants, and metal hydrates such as aluminum hydroxide and magnesium hydroxide as inorganic flame retardants.

Since this antiseptic / flame-retardant wood is subjected to both antiseptic treatment and flame retardant treatment as described above, it has both antiseptic properties and flame retardant properties. It can be used for applications that require both properties and flame retardancy.

When an antiseptic / preservative agent having an insecticidal effect in addition to the antiseptic agent is used as the antiseptic agent, the antiseptic / flame retardant treated wood is added to the antiseptic and flame retardant properties. Can also be given. Examples of such antiseptic / insecticides include metal salts of organic acids such as zinc naphthenate and copper naphthenate.

Next, a method for manufacturing the above-mentioned antiseptic / flame retardant treated wood will be described. The method for producing antiseptic / flame retardant treated wood according to this embodiment is such that after preliminarily dried wood is inserted into a pressure vessel and decompressed, a predetermined amount of preservative is introduced into the pressure vessel until a predetermined pressure is reached. After pressurizing and injecting the preservative into the wood under pressure, the unnecessary portion of the preservative is discharged to the outside of the pressure vessel, and the pressure inside the pressure vessel is reduced to remove the excess amount of the preservative from the wood. The surplus of the preservative is discharged to the outside of the pressure vessel, the pressure vessel is depressurized again, a predetermined amount of the flame retardant is introduced into the pressure vessel, and then the pressure is increased to a predetermined pressure to apply the flame retardant to the wood. After pressure-injecting, the unnecessary portion of the flame retardant is discharged to the outside of the pressure vessel, and then the wood is taken out from the pressure vessel and dried, thereby preserving the wood,
Flame-retardant treatment.

That is, first, the previously dried wood is inserted into a pressure vessel capable of depressurizing and pressurizing. This pressure vessel is connected to, for example, a vacuum pump or a compressor, and is capable of depressurizing and pressurizing. If necessary, a drain valve or the like that can discharge unnecessary liquid such as drainage to the outside of the pressure vessel is also provided. Has been. The wood is preferably dried in advance before being inserted into the pressure vessel as in this embodiment.

Next, inside the pressure vessel, for example, 600
After depressurizing the wood to about mmHg and holding it for about 30 to 60 minutes to deaerate the wood, a predetermined amount of preservative is introduced into the pressure vessel. Then, for example, by pressurizing to about 9.5 kgf / cm ^{2 and} holding for 3 to 5 hours, the preservative infiltrates from the pores on the surface of the wood to the inside and is injected under pressure. The pressure and the holding time at the time of depressurizing or pressurizing are not particularly limited to the above range, and can be variously changed as necessary. Further, the amount of the preservative may be so large that the preservative is accumulated in the pressure vessel.

Next, the unnecessary portion of the preservative is discharged from the drain valve or the like to the outside of the pressure vessel. Then, after decompressing the pressure vessel to remove the excess amount of the preservative from the wood,
Excessive amount of the preservative accumulated in the pressure vessel is discharged from the drain valve or the like. As described above, removing the excess amount of the preservative from the wood has an advantage that the wood can be easily infiltrated with the flame retardant in the subsequent flame-retardant treatment step.

Then, again inside the pressure vessel, for example, 6
After depressurizing the wood to a pressure of about 00 mmHg and holding it for about 30 to 60 minutes to deaerate the wood, a predetermined amount of flame retardant is introduced into the pressure vessel. Then, for example, when the pressure is increased to about 9.5 kgf / cm ² and the pressure is maintained for 3 to 5 hours, the flame retardant is infiltrated from the pores on the surface of the wood to the inside and injected under pressure.
Also in this case, as in the case of the above antiseptic treatment step, the pressure and the holding time at the time of depressurization and pressurization are not particularly limited to the above range. Also, the amount of the flame retardant may be used in such a large amount that the flame retardant accumulates in the pressure vessel.

Further, after the unnecessary portion of the flame retardant is discharged from the drain valve or the like to the outside of the pressure container, the wood is taken out from the pressure container and dried.

As described above, if a preservative is injected under pressure into the wood for antiseptic treatment, and then a flame retardant is injected under pressure for flame retardant treatment, both preservative treatment and flame retardant treatment are performed. Antiseptic
Flame-retarded wood is produced.

In the above-mentioned preservative treatment and flame retardant treatment, in general, the treatment amount of the flame retardant is larger than that of the preservative. Both of these processes can be performed efficiently. Further, since both treatments are continuously performed in the pressure vessel, there is an advantage that the step of drying the preservative can be omitted. Furthermore, since the treatment is performed by pressure injection, the preservative and flame retardant can be infiltrated deeper into the wood.

[0021]

EXAMPLES Next, examples of the present invention will be described, but the present invention is not limited to the examples.

A small width cedar plate having a thickness of about 11 mm (bulk specific gravity:
0.38), using zinc naphthenate (Toyo Timber Preservation Co., Ltd., Toyosol ZN) as an antiseptic insecticide to about 7 kg / m ³
After the antiseptic treatment at a rate of 1.0%, a flame retardant was used as an organic polymerized phosphorus compound (Nonen W-2-50 manufactured by Marubishi Yuka Co., Ltd.) at a rate of about 90 kg / m ³ to obtain a test body. did.

A plurality of these test pieces were prepared and a fireproof performance test (a surface test and a gas toxicity test prescribed in Ministry of Construction Notification No. 1231 of 1976) was conducted. The results are shown in Table 1 below.
And Table 2.

[0024]

[Table 1]

[0025]

[Table 2]

[0026]

As described above, according to the first aspect of the present invention, the wood is preservative- and flame-retardant-treated by injecting a preservative and a flame retardant. Therefore, the wood can be used for applications requiring both antiseptic property and flame retardant property.

According to the second aspect of the present invention, since the preservative is an antiseptic agent having an insecticidal effect in addition to an antiseptic effect, it imparts insecticidal property to wood as well as antiseptic property and flame retardancy. Therefore, there is an advantage that the use of wood is expanded.

According to the third aspect of the present invention, since the wood is subjected to the preservative treatment and then the flame retardant treatment, both of these treatments are efficiently performed in the usual case where the amount of the flame retardant treated is larger than that of the preservative. be able to. Further, since both treatments are continuously performed in the pressure vessel, there is an advantage that the step of drying the preservative can be omitted. Furthermore, after injecting the preservative under pressure,
Since the pressure vessel is decompressed to remove the excess amount of the preservative from the wood, there is an advantage that the wood can be easily infiltrated with the flame retardant in the subsequent flame-retardant treatment step. In addition, since the treatment is performed by pressure injection, the preservative and flame retardant can be infiltrated deeper into the wood, and therefore, the preservative and flame retardancy can be more effectively imparted.

Claims (3)

[Claims] 1. An antiseptic / flame retardant treated wood, which is obtained by injecting an antiseptic agent and a flame retardant into the wood to perform antiseptic and flame retardant treatment. 2. The antiseptic / flame retardant treated wood according to claim 1, wherein the antiseptic is an antiseptic insecticide having an insecticidal effect in addition to an antiseptic effect. 3. A wood is inserted into a pressure vessel, the pressure is reduced, a predetermined amount of a preservative is introduced into the pressure vessel, the pressure is increased to a predetermined pressure, and the preservative is injected under pressure into the wood. The unnecessary portion of the preservative is discharged to the outside of the pressure container, the pressure container is depressurized to remove the excess amount of the preservative from the wood, and the excess amount of the preservative is discharged to the outside of the pressure container, and again. After decompressing the inside of the pressure vessel, introducing a predetermined amount of flame retardant into the pressure vessel, pressurizing to a predetermined pressure to inject the flame retardant into the wood under pressure, and removing unnecessary portions of the flame retardant from the pressure vessel. By draining out and then removing the wood from the pressure vessel and drying
A method for producing antiseptic / flame-retarded wood, which comprises subjecting the wood to antiseptic treatment and then flame-retardant treatment.