JP2001193188A - Building construction method, wooden board manufacturing method, and building using them - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce harmful volatile substances inside a building such as a dwelling house. SOLUTION: The water solution or liquid dispersion of an arresting agent reacting with and arresting harmful volatile substances produced from building interior materials is applied onto the surface of an underfloor bed 8 forming the substrate of a floor surface of a building. Then, a floor finish material 9 is installed on the upper part of the underfloor bed 8.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a construction method of a building for reducing harmful volatile substances inside a building such as a house, a method of manufacturing a wooden board, and a building using the same.

[0002]

2. Description of the Related Art In recent years, there has been a problem that the influence of chemical contamination in the air inside a building on the health of residents is a problem. It is said that this is caused by a resident inhaling volatile substances generated from interior materials and furniture into the body by respiration. At this time, formaldehyde poses a particularly serious problem, and it is said that the amount generated in buildings, apartments, condominiums, etc. that are newly built or renovated or renovated is extremely large, and it takes a very long time to reduce the amount generated. I have.

It is said that, among building materials, plywood and particleboard forming the floor generate a particularly large amount of harmful substances such as formaldehyde among interior materials.

[0004] In response to this air pollution by formaldehyde, attempts have generally been made to reduce the formaldehyde content of interior materials facing directly into the room.

[0005]

However, in the means for reducing the formaldehyde content of the interior material directly facing the room, it is necessary to use a formaldehyde-reduced material for all interior materials, which increases the cost. In many cases, no substantial improvement was achieved.

[0006] Among the constituent materials of a house, wood-based boards such as particle boards constituting floors and the like are generally difficult to essentially suppress the emission of formaldehyde due to their composition. Therefore, the board is likely to warp due to a change in the water content.

Japanese Patent Application Laid-Open No. 10-603 discloses a method in which an aqueous sodium sulfite solution is sprayed on a wooden board immediately after heating and compression to neutralize the board and adjust the water content. Although it is effective in preventing warpage and neutralizing the acid generated by heating, it cannot essentially suppress the emission of formaldehyde.

Accordingly, an object of the present invention is to solve the above-mentioned problems and to provide a construction method of a building capable of reducing harmful volatile substances inside a building such as a house, a wooden board, and a building using the same. Is to provide.

[0009]

According to a first aspect of the present invention, there is provided a method for constructing a building, comprising the steps of: It is characterized by applying an aqueous solution or aqueous dispersion of a trapping agent that reacts with and captures harmful volatile substances generated from interior materials, and then installs a floor finishing material on top of the floor base material I have.

According to the first aspect of the present invention, the harmful volatile substance generated from the building interior material reacts on the surface of the floor base material constituting the base of the floor of the building. By applying an aqueous solution or an aqueous dispersion of a catching agent to catch this, and then installing a floor finishing material on the floor base material, harmful volatile substances can be effectively captured. In addition, by effectively using trapping agents that react with and trap harmful volatile substances, the release of harmful volatile substances from various flooring materials is suppressed, and as a result, indoor harmful substances are eliminated. The concentration is reduced, and a healthier air environment can be realized. Moreover, after the aqueous solution or the aqueous dispersion of the trapping agent is applied, the trapping agent penetrates into the interior of the floor base material together with the water and exerts the effect, so that the effect is maintained until the trapping agent itself loses the trapping ability. Can last.

In the invention described in claim 2, claim 1 is
In the building construction method according to the above, the aqueous solution or the aqueous dispersion of the trapping agent is applied at a construction site immediately after installing a floor finishing material of the building after mounting the floor base material of the building. .

According to the second aspect of the present invention, the aqueous solution or the aqueous dispersion of the scavenger is
It can be applied to the construction of any building by applying it at the construction site immediately after installing the floor finishing material after installing the floor base material of the building.

[0013] According to the third aspect of the present invention, the first aspect is provided.
In the building construction method described above, the aqueous solution or aqueous dispersion of the trapping agent is applied to a floor base material at a stage of assembling a building unit constituting a unit building at a factory, and the building unit is assembled at a construction site. It is characterized by:

According to the third aspect of the present invention, the aqueous solution or aqueous dispersion of the scavenger is
By applying the building unit constituting the unit building to the floor base material at the stage of assembling at the factory, it is possible to efficiently apply the stimulant and assemble the building unit.

According to a fourth aspect of the present invention, in the construction method for a building, the glue is diluted with an aqueous solution of a trapping agent which reacts with and captures harmful volatile substances generated from the building interior material. The present invention is characterized in that wallpaper is attached to at least one of a wall surface and a ceiling surface of a building using the paste.

According to the invention according to the fourth aspect, the glue is diluted with an aqueous solution of a trapping agent which reacts with and captures harmful volatile substances generated from the building interior material. By using the glue to paste wallpaper on at least one of the wall or ceiling of the building,
Harmful volatile substances can be effectively captured. Effectively uses a trapping agent that reacts with and traps harmful volatile substances, thereby suppressing the release of harmful volatile substances from walls and ceilings or absorbing components emitted from indoors Thus, the concentration of harmful substances in the room can be reduced, and a healthier air environment can be realized. Moreover, after the aqueous solution or aqueous dispersion of the trapping agent is applied, the trapping agent penetrates with the water into the interior of the ceiling material or the inner wall material and exerts an effect, so that the trapping agent itself loses the trapping ability. The effect can be maintained.

The glue and the scavenger may be diluted or dispersed together in water.

According to a fifth aspect of the present invention, in the method for producing a wooden board, when producing a wooden board comprising a phenol resin, a melamine resin or a urea resin cured by formaldehyde condensation and a wooden fiber, The method is characterized in that an aqueous solution or aqueous dispersion of a catching agent that reacts with formaldehyde and captures it is applied to the board immediately after the heat compression.

According to the fifth aspect of the present invention, when a wood-based board made of a phenolic resin, a melamine resin, or a urea resin cured by formaldehyde condensation and a wood fiber is produced, heating is performed. By applying or spraying an aqueous solution or aqueous dispersion of a scavenger that reacts with and captures formaldehyde on the board immediately after compression, the water content of the board is adjusted and the release of formaldehyde from the board Is suppressed.
Thereby, it is possible to prevent a warp and a change in shape of the board, and to obtain a wood-based board in which the emission of formaldehyde, which is a harmful volatile substance, from the board is suppressed.

Further, after the aqueous solution or the aqueous dispersion of the trapping agent is applied, the trapping agent penetrates into the wood board together with the water, so that the formaldehyde released to the surroundings can be absorbed. The release suppressing effect and the absorbing effect can be maintained until the scavenger itself loses its trapping ability.

According to the invention described in claim 6, in claim 5
It is characterized by a building using wooden boards obtained by the above method.

According to the invention according to claim 6 configured as described above, since the building is a house or the like using the wooden board obtained in claim 5, a phenol resin cured by formaldehyde condensation is provided. Even in buildings using wood-based boards made of melamine resin or urea resin and wood fibers, the wood-based boards are controlled for harmful volatility because the emission of formaldehyde, a harmful volatile substance, is suppressed. It is possible to obtain a building in which the emission of formaldehyde, which is a substance, is suppressed.

[0023] Further, by effectively using a trapping agent which reacts with and traps formaldehyde, the release of formaldehyde, which is a harmful volatile substance, from the wood-based board is suppressed, or Formaldehyde released from other places in the room is absorbed by the wood-based board, the concentration of harmful substances in the room is reduced, and a building with a healthier air environment can be provided.

[0024]

First Embodiment A first embodiment of the present invention will be described below with reference to the drawings.

FIGS. 1 to 3 show a first embodiment of the present invention, and show a case where the present invention is applied to a unit construction method of assembling a box-shaped building unit to construct a unit building.

In FIG. 1, reference numeral 1 denotes a building unit constituting a building such as a unit building.
Structural materials such as four unit pillars 2, four floor beams 3 connecting the lower ends of the unit pillars 2, and four ceiling beams 4 connecting the lower ends of the unit pillars 2. It is configured in a box frame shape with structural materials.

As shown in FIG. 2, a plurality of floor beams 5 are erected between the opposing floor beams 3, 3, and the floor beams 5,
The floor sound insulation material 6 is interposed between the floor beams 5, and the floor beams 5, 5
A plurality of floor joists 7 are erected between the upper portions. And
On the upper part of the floor joist 7, a floor base material 8 is installed.
A floor finishing material 9 such as a flooring or a tatami mat is installed on the upper part of the floor, that is, on the floor surface.

A plurality of ceiling joists 10 are provided between the facing ceiling beams 4, 4, and a ceiling material 11 such as a gypsum board is provided below the ceiling joists 10. The wallpaper 12 is attached to the lower surface of the ceiling material 11, that is, the ceiling surface. The gypsum board 1 is provided on the upper surface of the ceiling material 11.
3, ceiling damping material 14, glass wool 15, etc. are installed.

Further, as shown in FIG. 3, a number of studs 20 are provided between the floor beam 3 and the ceiling beam 4 which are vertically opposed to each other, and a heat insulating material 21 such as glass wool is provided between the studs 20 and 20. A wooden bar 23 is extended inside the stud 20 via a wooden brick 22, and an inner wall material 24 such as a reinforced gypsum board is installed on the wooden bar 23. The wallpaper 25 is attached to the inner surface of the inner wall material 24, that is, the wall surface. The outer wall panel 2 is provided outside the stud 20 via a cross-linked foamed polyethylene tape 26 and an iron frame 27.
8 is attached, and a gasket 29 is attached to a seam between the outer wall panels 28, 28.

In the first embodiment, the stimulus that reacts with and captures harmful volatile substances generated from the building interior material on the surface of the floor base material 8 constituting the base of the floor of the building. An aqueous solution or dispersion of the agent is applied, and thereafter, a floor finishing material 9 is placed on the floor base material 8.

At this time, the aqueous solution or the aqueous dispersion (propellant liquid) of the above-mentioned propellant is applied to the floor base material 8 at the stage of assembling the building unit 1 constituting the unit building at the factory. The unit 1 is assembled at the construction site.

Here, the floor base material 8 refers to a plywood, a particle board, an OSB, etc., which are generally used as a plate-like material for supporting the floor.

The floor surface means the upper surface of the floor, and refers to the surface of the installed floor base material 8 facing the room.

Examples of the scavenger which reacts with and captures harmful volatile substances generated from building interior materials include urea compounds and specific amide compounds for formaldehyde.

The amount of the stimulant solution (water solution or aqueous dispersion of the stimulant) applied is, for example, the amount of the stimulant itself when the stimulant liquid FC-11 (manufactured by Oshika Shinko Co., Ltd.) is used. Is 20g
/ M 2 to 200 g / m 2 are suitable. If the coating amount is less than this, sufficient effects cannot be exhibited, and if it is more than this, the shape stability of the plate material will be lost, the adhesion to the flooring material will be poor, and water will remain on the surface and this will be dried It may take a long time to reduce the efficiency of construction.

As described above, an aqueous solution of a scavenger or an aqueous solution of a trapping agent which reacts with and captures harmful volatile substances generated from building interior materials on the surface of the floor base material 8 constituting the base of the floor of the building. By applying the aqueous dispersion and thereafter placing the floor finishing material 9 on the floor base material 8, harmful volatile substances can be effectively captured. In addition, by effectively using trapping agents that react with and trap harmful volatile substances, the release of harmful volatile substances from various flooring materials is suppressed, and as a result, indoor harmful substances are eliminated. The concentration is reduced, and a healthier air environment can be realized. Moreover, after applying the aqueous solution or dispersion of the scavenger,
Since the trapping agent permeates into the floor base material 8 together with the water and exerts its effect, the effect can be maintained until the trapping agent itself loses its trapping ability.

Further, the aqueous solution or the aqueous dispersion of the trapping agent is applied to the floor base material 8 at the stage when the building unit 1 constituting the unit building is assembled at the factory.
The application of the scavenger and the assembly of the building unit 1 can be performed efficiently.

In addition, since the application of the trapping agent liquid can be performed by applying it to the feet in the building unit 1 in the factory, the application efficiency is high.

[0039]

[Modification] As a modification of the first embodiment, an aqueous solution or aqueous dispersion of the trapping agent is applied at a construction site immediately after the floor finishing material 9 is installed after the floor covering material is attached to the building. You may do it.

As described above, the aqueous solution or the aqueous dispersion of the trapping agent is applied at the construction site immediately after the floor finishing material 9 is installed after the floor base material of the building is attached, so that it can be applied to any building. Can be applied to

In addition, since the application of the trapping agent liquid can be performed by applying it to the feet indoors during construction, the application efficiency is high.

[0042]

EXAMPLES Examples of the first embodiment will be described below in detail. (Example 1) At the time of interior construction of a steel-frame unit building, 60 g of Diamsh FC-1 (manufactured by Oshika Shinko Co., Ltd.) was used as a scavenger for formaldehyde and the like generated from particle boards and flooring on the floor surface before installing flooring. / M 2, and after 15 minutes, flooring or tatami was applied to the ground surface to complete the work. (Embodiment 2) In the last step of manufacturing each building unit of a steel frame unit building using the same structure and material as in Embodiment 1,
A diamsh FC-11 (manufactured by Oshika Shinko Co., Ltd.) as a scavenger for formaldehyde and the like generated from the particle board and the flooring was applied to the floor base surface before the flooring was installed at a coating amount of 60 g / m 2 by a mop. Each building unit was installed at the construction site three days after application, and required interior and exterior construction was performed to complete the construction. (Comparative Example 1) A building was completed in the same manner as in Example 1 except that the coating treatment was not performed on the floor base surface. (Measurement of Formaldehyde Concentration) Using a small pump, a predetermined amount of room air was sucked and bubbled in 10 cubic centimeters of distilled water in an impinger absorption tube to absorb formaldehyde in the air into the distilled water. The formaldehyde concentration in the water was measured according to JIS A5908, and this was converted to an air concentration.

Sampling is within 13 days after completion of the project
From 10:00 to 15:00, close the doors and windows completely from the day before and keep it closed, 120cm above the floor in the center of the room
Went in terms of points. As a result, the following table was obtained.

[0044]

[Table 1]

(Results) It was confirmed that in Examples 1 and 2, indoor pollution of harmful volatile substances at the time of new construction can be reduced and a healthier environment can be realized, as compared with Comparative Example 1.

[0046]

[Embodiment 2] In this embodiment 2, the paste is diluted with an aqueous solution of a trapping agent which reacts with and captures harmful volatile substances generated from building interior materials, and the paste is diluted. Use wallpaper 1 on at least one of the wall or ceiling of the building
Attach 2,25.

Here, the wallpapers 12 and 25 refer to wallpapers made of vinyl cloth and fibers made of soft vinyl chloride, acrylic resin, ethylene-vinyl acetate copolymer resin and the like, and wallpapers made of paper.

The glue used when pasting the wallpapers 12 and 25 is as follows.
It is used for adhesion between the wallpaper 12, 25 and the wall / ceiling inner wall. Generally, starch paste / mixed paste of vinyl acetate / starch is used. The above paste is used after being diluted with water at the time of construction and adjusted to a viscosity suitable for adhering to the wallpaper, but in the present invention, a trapping agent having a function of trapping harmful substances in water at the time of this viscosity adjustment was included. Use things.

Examples of the scavenger for reacting with and trapping harmful volatile substances generated from building interior materials include urea compounds and specific amide compounds for formaldehyde.

The amount of the scavenger for trapping harmful substances is suitably 5 wt% to 20 wt% of the paste at the time of application. If the amount is less than this, a sufficient capturing effect cannot be exhibited, and if it is more than this, the original adhesiveness of the paste may be impaired, or the workability of wallpaper pasting may be impaired.

As described above, the glue is diluted with the aqueous solution of the trapping agent which reacts with and captures harmful volatile substances generated from the building interior material, and the glue is used to dilute the glue. By attaching the wallpapers 12 and 25 to at least one of the above, harmful volatile substances can be effectively captured. Effectively uses a trapping agent that reacts with and traps harmful volatile substances, thereby suppressing the release of harmful volatile substances from walls and ceilings or absorbing components emitted from indoors Thus, the concentration of harmful substances in the room can be reduced, and a healthier air environment can be realized. Moreover,
After the aqueous solution or the aqueous dispersion of the trapping agent is applied, the trapping agent permeates the inside of the ceiling material 11 or the inner wall material 24 together with the water and exerts an effect, so that the trapping agent itself loses the trapping ability. The effect can be maintained.

The glue and the scavenger may be diluted or dispersed together in water.

The other parts have the same configuration as in the first embodiment, and the same operation and effect can be obtained.

[0054]

EXAMPLE An example of the second embodiment will be described below in detail. (Example 1) Luer mild (manufactured by Yayoi Chemical Co., Ltd.) was used as a glue for pasting the wallpaper at the time of wallpaper construction on all walls and ceilings of a steel frame unit building. It was diluted with 70 parts by weight of a scavenger, Diamsch FC-11 (manufactured by Oshika Shinko Co., Ltd.). After completing other interior construction work, it was completed. (Comparative Example 1) A building was completed in the same manner as in Example 1 except that 100 parts by weight of Luer Mild (manufactured by Yayoi Chemical Co., Ltd.) was diluted with 70 parts by weight of tap water at the time of wallpaper construction. (Measurement of Formaldehyde Concentration) Using a small pump, a predetermined amount of room air was sucked and bubbled in 10 cubic centimeters of distilled water in an impinger absorption tube to absorb formaldehyde in the air into the distilled water. The formaldehyde concentration in the water was measured according to JIS A5908, and this was converted to an air concentration.

[0055] Sampling is performed in the afternoon within 3 days after the completion of construction.
From 10:00 to 15:00, close the doors and windows completely from the day before and keep it closed, 120cm above the floor in the center of the room
Went in terms of points. As a result, the following table was obtained.

[0056]

[Table 2]

(Results) In Example 1, as compared with Comparative Example 1, the release from the material of the wall and ceiling treated with the scavenger was suppressed, and at the same time, the release components originating from other parts were also reduced.
It was confirmed that it could be adsorbed on the ceiling. In addition, it was confirmed that indoor pollution of harmful volatile substances at the time of new construction can be reduced, and a healthier environment can be realized.

[0058]

Third Embodiment In the third embodiment, when a wood-based board made of a phenol resin, a melamine resin or a urea resin cured by formaldehyde condensation and a wood fiber is produced, A wood-based board is produced by applying or spraying an aqueous solution or aqueous dispersion of a catching agent that reacts with and captures formaldehyde.

Here, “immediately after heating and compression” indicates a state in which the temperature of the raw wood board after heating and compression is sufficiently maintained. Specifically, after demolding, the temperature is preferably within 15 minutes, more preferably within 7 minutes, or a state where the temperature of the base plate of the wooden board is maintained at 70 ° C. or higher. By applying or spraying the aqueous solution or aqueous dispersion of the scavenger immediately after the heating and compression, the aqueous solution or aqueous dispersion of the scavenger is sufficiently absorbed and permeated into the base plate of the wooden board.

Further, after the base plate can be released from the mold, before the warpage is determined, the step of supplying water and the step of supplying the water simultaneously with the step of supplying water make it possible to perform the steps of supplying the trapping agent and water in one step. It can be performed in a process, and one process can be omitted. In addition, the wood-based board in which the warpage is prevented by this means can release formaldehyde, which is a harmful volatile component, and capture surrounding formaldehyde.

Examples of the scavenger that reacts with and captures this formaldehyde include urea compounds and specific amide compounds.

The amount of the scavenger liquid (aqueous solution or aqueous dispersion of the scavenger) applied is, for example, in the case of using the scavenger liquid FC-11 (manufactured by Oshika Shinko Co., Ltd.), based on the total surface area of the board. And 50 g / m 2 or more is appropriate. Thereby, the moisture content of the board is adjusted, and the release of formaldehyde from the board is suppressed.

If the amount is small, sufficient effects may not be exhibited. On the other hand, if this amount is unnecessarily increased, the adhesiveness with a flooring material or the like may be deteriorated,
It may take a long time to dry it, which may reduce the efficiency of construction.

Further, by applying the aqueous solution or the aqueous dispersion of the supplement, the board is adjusted so that the moisture content of the board becomes 5 to 12%, thereby preventing the board from warping or changing its shape.

By using such a wooden board for a building such as a house, a building using a wooden board made of a phenol resin, a melamine resin or a urea resin cured by formaldehyde condensation and a wood fiber is used. However, since the emission of formaldehyde, which is a harmful volatile substance, is suppressed in the wooden board, it is possible to obtain a building in which the emission of formaldehyde, which is a harmful volatile substance, is suppressed.

In addition, by effectively using a trapping agent that reacts with and traps formaldehyde, the release of formaldehyde, which is a harmful volatile substance, from the wood-based board is suppressed, or Formaldehyde released from other places in the room is absorbed by the wood-based board, the concentration of harmful substances in the room is reduced, and a building with a healthier air environment can be provided.

Since the trapping agent is applied (preferably sprayed) in the form of an aqueous solution or an aqueous dispersion, the trapping agent permeates into the wood board together with the water, and the trapping agent itself is trapped. This supplemental effect of formaldehyde can be sustained until the ability is lost.

Such a wooden board can be efficiently used as a floor base material 8 at the stage of assembling a building unit 1 constituting a unit building in a factory, for example. The building unit 1 using the system board can be assembled.

[0069]

EXAMPLE An example of the third embodiment will be described below in detail. (Examples 1 and 2 and Comparative Examples 1 and 2) A laminating material powder of 1.0 to 1.5 mm and a urea resin adhesive were used to deposit for 15 minutes.
After heating and compression at 120 ° C., 12 kgf / square centimeter (1.2 MPa) and 60 seconds for 60 minutes to solidify the particle board, immediately, an aqueous solution of formaldehyde scavenger (manufactured by Oshika Kogyo Co., Ltd.) under the conditions shown in Table 3 Deamsh FC-1) or tap water was sprayed on both sides.

[0070]

[Table 3]

(Measurement of formaldehyde concentration)
The formaldehyde emission of the boards of Examples and Comparative Examples was measured by a desiccator method based on A5908. As a result, the following table was obtained.

[0072]

[Table 4]

(Results) It was confirmed that Examples 1 and 2 can produce a wood-based board in which the emission of formaldehyde was reduced to substantially zero, as compared with Comparative Examples 1 and 2. It is understood that a healthier environment can be maintained if the is used for a building such as a house.

[0074]

As described above, according to the first aspect of the present invention, harmful volatile substances generated from building interior materials react on the surface of the floor base material constituting the base of the floor of the building. Then, by applying an aqueous solution or aqueous dispersion of a scavenger for capturing the same, and thereafter installing a floor finishing material on top of the floor base material, it is possible to effectively capture harmful volatile substances. . In addition, by effectively using trapping agents that react with and trap harmful volatile substances, the release of harmful volatile substances from various flooring materials is suppressed, and as a result, indoor harmful substances are eliminated. The concentration is reduced, and a healthier air environment can be realized. Moreover, after the aqueous solution or the aqueous dispersion of the trapping agent is applied, the trapping agent penetrates into the interior of the floor base material together with the water and exerts the effect, so that the effect is maintained until the trapping agent itself loses the trapping ability. Can last.

According to the second aspect of the present invention, the aqueous solution or aqueous dispersion of the trapping agent is applied at the construction site immediately after the floor covering material is installed and immediately before the floor finishing material is installed.
It can be applied to construction of any building.

According to the third aspect of the present invention, the aqueous solution or the aqueous dispersion of the trapping agent is applied to the floor base material at the stage when the building units constituting the unit building are assembled at the factory, so that the floor covering material is efficiently used. The application of the scavenger and the assembly of the building unit can be performed.

According to the fourth aspect of the present invention, the glue is diluted with an aqueous solution of a trapping agent which reacts with and captures harmful volatile substances generated from building interior materials, and the building is diluted with the glue. By attaching a wallpaper to at least one of the wall surface and the ceiling surface, harmful volatile substances can be effectively captured. Effectively uses a trapping agent that reacts with and traps harmful volatile substances, thereby suppressing the release of harmful volatile substances from walls and ceilings or absorbing components emitted from indoors Thus, the concentration of harmful substances in the room can be reduced, and a healthier air environment can be realized. Moreover, after the aqueous solution or aqueous dispersion of the trapping agent is applied, the trapping agent penetrates with the water into the interior of the ceiling material or the inner wall material and exerts an effect, so that the trapping agent itself loses the trapping ability. The effect can be maintained.

According to the fifth aspect of the present invention, when a wood-based board comprising a phenol resin, a melamine resin or a urea resin cured by formaldehyde condensation and a wood fiber is produced, the board immediately after the heat compression is treated with formaldehyde. By providing an aqueous solution or aqueous dispersion of a catching agent that reacts and captures the same, the water content of the board is adjusted and the release of formaldehyde from the board is suppressed.
Thereby, it is possible to prevent a warp and a change in shape of the board, and to obtain a wood-based board in which the emission of formaldehyde, which is a harmful volatile substance, from the board is suppressed.

Furthermore, after the aqueous solution or the aqueous dispersion of the trapping agent is applied, the trapping agent has penetrated into the wood board together with the water. This effect can be maintained until the scavenger itself loses its trapping ability.

According to the invention of claim 6, since the building is a house or the like using the wood-based board obtained in claim 5, the phenol resin, melamine resin or urea resin cured by formaldehyde condensation and the wood Even in buildings that use wood-based boards made of fibers, the wood-based boards have reduced emission of harmful volatiles, such as formaldehyde, because their emission is controlled. A suppressed building can be obtained.

Further, by effectively using a trapping agent which reacts with and traps formaldehyde, the release of formaldehyde, which is a harmful volatile substance, from the wood-based board is suppressed, or Formaldehyde released from other parts of the room is absorbed by this wood-based board, reducing the concentration of harmful substances in the room and providing a building with a healthier air environment. Can be demonstrated.

[Brief description of the drawings]

FIG. 1 is a perspective view of a building unit according to a first embodiment of the present invention.

FIG. 2 is a sectional view of a floor and a ceiling portion.

FIG. 3 is a sectional view of a wall portion.

[Explanation of symbols]

 1 Building unit 8 Flooring material 9 Floor finishing material 11 Ceiling material 12 Wallpaper 24 Interior wall material 25 Wallpaper

Claims (6)

[Claims] An aqueous solution or aqueous dispersion of a trapping agent which reacts with and captures harmful volatile substances generated from building interior materials on the surface of the floor base material constituting the floor of the floor of the building. A construction method for a building, comprising applying a coating material, and then installing a floor finishing material on the floor base material. 2. An aqueous solution or aqueous dispersion of the scavenger,
The method according to claim 1, wherein the application is performed at a construction site immediately after the floor finishing material is installed after the floor base material is attached to the building. 3. An aqueous solution or aqueous dispersion of the scavenger,
The building construction method according to claim 1, wherein the building unit constituting the unit building is applied to a floor base material at a stage of assembling at a factory, and the building unit is assembled at a construction site. 4. A paste is diluted with an aqueous solution of a trapping agent which reacts with and captures harmful volatile substances generated from building interior materials, and the paste is used to dilute at least the wall or ceiling of a building. A building construction method characterized by attaching wallpaper to one side. 5. When a wood-based board comprising a phenolic resin, a melamine resin or a urea resin and a wood fiber cured by formaldehyde condensation is produced, the board immediately after heating and compression reacts with formaldehyde to capture it. A method for producing a wood-based board, comprising applying an aqueous solution or aqueous dispersion of a scavenger. 6. A building using the wooden board obtained according to claim 5.