JP2001001312A - Facing material for building structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wood fiberboard as a facing material for a building structure without adding a separate process anew to a manufacturing process for the wood fiberboard. SOLUTION: A wood fiberboard 2a, 2b is joined to each of both faces of a core made up of a synthetic resin foamed board through an adhesive containing a preservative and a sheet-like material 3a, 3b is attached to the outer face of at least one of the sides of the wood fiberboard 2a, 2b using the adhesive containing the preservative. At the same time, on the outside of the wood fiberboard 2a, 2b, a layer of a lower specific gravity than that of a rock layer 4 is exposed on the outside of the rock layer A. The preservative contains a pyrethroid compound as a useful component. On the four faces of a facing for a building structure excepting both outer faces, a coating containing the preservative is applied. The sheet-like material 3a, 3b is attached only to the outer face of the wood fiberboard 2a on one side and the coating containing the preservative is applied to the outer face of the wood fiberboard 2b on the other side. In addition, the outer face of the wood fiberboard 2a, 2b is further treated for anti-slippage.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wood fiberboard processed with a waterproof and moisture-proof treatment and a preservative such as insect repellent, fungicide, preservative, etc., and has a durability suitable for wall materials, floors and roof base materials. It is related to structural face materials.

[0002]

2. Description of the Related Art Conventionally, wood fiberboard has been known. The wood fiberboard used in the present invention is, for example, a medium density fiberboard (MD
In the case of F), the entire average specific gravity is 0.35 to 1.0, and a high-density and hard layer having a specific gravity of 0.8 to 1.4 called a bedrock layer is provided on both sides. The existence of the high-density bedrock is a major reason why the wood fiberboard has excellent strength despite its relatively light weight. In addition, since the wood fiber board has almost no directionality of the fiber, physical properties in which the strength and expansion and contraction do not change in the vertical and horizontal directions can be obtained, and the shape and dimensions are constant, and construction and processing are easy. Moreover, it has high heat insulation and sound absorption properties, and is excellent as a material for adjusting sound and room temperature. Therefore, it is used in a wide range from furniture members, construction members, and building members. However, it is water resistant for use in building structures,
It requires moisture resistance and antiseptic processing.

[0003] By the way, in a conventionally used dry manufacturing process of a wood fiber board, an adhesive is added to wood fibers which are high-pressure defibrated from wood chips, and a wood fiber mat is manufactured by a forming device. The wood fiberboard is obtained by hot pressing. However, in this state, since a low-density thin layer is formed on the front and back of the board by adhesive pre-curing, the pre-cured layer is completely removed by sanding etc. to obtain a wood fiber board as a final product, And the surface was shaved until the rock layer of 0.8-1.4 was exposed on both sides.

[0004]

The structural surface material is a surface material used to increase the rigidity of a detached house or a small register building against external force, and is used for a main part in structural strength. For example, it is used as a floor material, a wall material, a roof base material, and the like. Conventionally, there are structural plywood and structural panels as structural face materials, but these are often joined by nailing or wood screws in addition to joining by bonding.

[0005] In view of the above-mentioned compatibility of the conventional wood fiber board, it has been found that there is a problem with nailing. The wood fiberboard as the final product has a rock layer exposed on the surface, but the surface is usually too hard when driving nails, resulting from the physical property of poor penetration and poor workability. There is an essential problem. In addition, when nailing is advanced and the nail head is submerged in the plate surface, the surface rock layer is directly hit with a nail head or a hammer, and the surface is destroyed. In the wood fiber board whose surface is destroyed, the rock layer at that portion stops functioning, and the lateral resistance of the nail and the nail penetration force are significantly reduced. In this regard, it can be said that the existence of the rock layer exposed on the surface functions rather badly. Therefore, despite the fact that it has excellent in-plane shearing force and bending strength as a structural surface material, there is a problem of nailing joining, and the reason why the use of wood fiberboard is postponed is here. is there.

[0006] Wood fibers are natural products, and require insect repellent and antibacterial properties in order to maintain their physical properties. Further, due to the structure of the wood fiber board, it is necessary to provide waterproof and moistureproof treatment. Further, since the wood fiber board has a smooth surface inevitably in manufacturing, it is slippery at the time of handling and the workability is poor. In particular, when used as a base material for a roof having a steep slope such as a non-flat roof, there is a danger that the worker is slippery and the roof material slides down. Therefore, the surface may be cut in anticipation of the anti-slip effect. However, since this means extremely reduces the strength of the plate, there is a problem in using it as a structural material.

[0007] The present invention has been made to solve the above-mentioned conventional problems, and it is an object of the present invention to obtain a wood fiber board as a surface material for a building structure without adding a new step in a wood fiber board manufacturing process. The purpose of the present invention is to disclose a technology capable of performing the following.

[0008]

SUMMARY OF THE INVENTION In order to achieve the above-mentioned object, an adhesive containing a preservative is provided on both sides of a core made of a synthetic resin foam plate. The wood fiberboard was joined through. Then, a sheet-like material was stuck to at least one outer surface of these wood fiber boards with an adhesive containing a preservative. On the outside of the wood fiber board, a means was used in which a layer having a lower specific gravity than the bedrock layer was exposed outside the bedrock layer. In this means, the synthetic resin foam plate exists in a sandwich shape in the center, heat insulation,
Performs soundproofing and gross weight reduction. In addition, the preservative used in the present invention refers to an agent that performs actions such as insect repellent, fungicide, and preservative. However, since the preservative is contained in the adhesive, these functions are It can be used when the agent is applied. The function is to prevent invasion of insects such as termites into the wood fiber board and make the medicinal properties of the preservative multifunctional so that it also has functions such as antifungal and antiseptic. Further, the means for exposing a layer having a lower specific gravity than this bed layer outside the bed layer acts to protect the bed layer. That is, in the process of manufacturing a wood fiber board, a layer having a relatively low density is placed in the center of the fiber board after the completion of the heat pressing, and the layer is sandwiched between the layers, for example, M
In DF, a high-density bedrock that continuously changes at a specific gravity of about 0.8 to 1.4 is formed, and a medium-density fiber layer that continues at a stable specific gravity of about 0.35 to 0.8 outside the layer Exists, and a precure layer having a low specific gravity, which is brittle and slippery and has insufficient strength, appears on the outermost part. In the conventional wood fiber board, since the board layer was expected to have a hard surface by exposing the bed layer, not only the precure layer was removed in the final processing stage, but also the medium-density fiber layer and the bed layer in a stable state. Cutting was performed until the hardest part appeared. However, the advantage of the medium-density fiber layer is that it has a function of elastically holding nails and the like, similarly to the layer existing in the center. Further, since the medium-density fiber layer has elasticity, even when the nail is completely driven, it is not broken by the nail head and is not broken by the impact of the hammer. Thus, the outer middle density layer functions as a cushioning material against external force. As a result, a surface material for a building structure suitable for a base plate or a floor plate that can withstand nailing or the like is achieved. The wood fiberboard in the present invention includes not only the above-mentioned medium specific gravity fiberboard (MDF) but also a high specific gravity fiberboard (HDF). Needless to say, in the case of HDF, the bedrock layer and its outer layer each have a specific gravity larger than that described in MDF.

Examples of the sheet material include synthetic resin sheets such as polyethylene sheets, vinyl chloride sheets, and polypropylene sheets; metal sheets such as aluminum foil and copper foil;
The core material is a resin-impregnated paper obtained by impregnating a resin into a bituminous sheet such as aluminum resin laminated film, aluminum sand paper, asphalt felt, roofing, etc. One sheet material selected from the group consisting of moisture-proof paper is selectively employed. When a synthetic resin sheet or resin-impregnated paper is stuck, this sheet adjusts the moisture content of the wood fiber board sealed inside as a result, and acts to suppress excessive high humidity and excessive drying, Since the substance seals the preservative contained in the adhesive, the effects of the preservative such as ant-proofing, mold-proofing and antiseptic can be maintained for a longer period of time. On the other hand, a metal sheet such as an aluminum foil exhibits an improvement in fire resistance and an electromagnetic wave shielding function.

[0010] Pyrethroid compounds specified as preservatives include, for example, arethrin, phthalthrin, praletrin,
Flamethrin, emventrin, phenothrin, velmethrin, cyphenothrin, cybermethrin, decamethrin, tralomethrin, deltamethrin, bifenthrin, cyfluthrin, etofenbrox, transfluthrin, cyclobrothrin, acrinasulin, fenvalerate, esfenvalerate, flucitrinate, etc. It contains a component compound, and it is particularly preferable to use bifenthrin and cyphenothrin. These agents are particularly effective in controlling creeping harmful arthropods. Specific animals to be controlled include cockroaches (such as German cockroaches, black cockroaches, brown cockroaches, etc.), ants (such as house dust ants and giant ants), stink bugs (such as stag beetles, Scott stink bugs), and indoor dust mites (egyptian mites, Dermatophagoides farinae). ), Geese (geji, giant pheasant, etc.), centipedes (gebium mosquito, aozumukade, sessia akameji, etc.), millipedes (yake-yasade, okayamade, etc.), dwarf beetles (e.g.

As for the antibacterial properties, Alternaria spp., Asperg
illus, Cladosporium, Fusarium, Gliocladium
Genus, Penicillium genus, Rhizopus genus, Trichoderma genus and other surface contaminants, Ceratocystis genus, Diplodia genus, Vercicicladi
Genus ella, Pbialophora, Alternaria, Chlorosporiu
Genus, Fusarium genus and other sapwood discoloring fungi, Coniophora, Gloeop
hyllum, Lentinus, Serpula, Tyromyces, Schi
Genus zophyllum, Corious, Pycnoporus, Acremonium
Genus, Bispora Ceratocystis, Chaetomium, Coniothy
genus rium, genus Cylindrocarpon, genus Cliocladium, Humicola
Genera, Ophiostoma, Pestalotia, Phialocephara, P
hialophora, Phoma, Rhinocladella, Scytalidi
It exhibits excellent fungicidal and antiseptic activity against wood rot fungi such as um genus, and is used in the present invention as described above with IPBC (3-iodo-2-propylbutylcarbamate) conventionally used in the wood industry. This does not preclude the use of the same drugs.

The amount of the preservative used varies depending on the type of preservative, the use scene, and the like. For example, when a pyrethroid compound is used as the active ingredient compound, the amount of the preservative is 0.1% in the adhesive.
The amount of the active ingredient compound is adjusted to 0.1 to 10 g per 1 m ^{2 of} the sheet material.

Materials used as the adhesive include phenolic resins, resorcinol resins, phenolmelamine resins, urea resins, melamine resins, ureamelamine cocondensation resins, vinyl acetate copolymer emulsions, epoxy resins, polyurethane resins Adhesives such as ethylene-vinyl acetate copolymer emulsion, polyvinyl alcohol-based resin, acrylic resin, aqueous polymer isocyanate-based resin, α-olefin maleic anhydride resin, and rubber-based adhesive are used singly or as a mixture. The amount of the adhesive used is in the range of 50 to 300 g / square meter of the adhesive containing the preservative active ingredient of 0.1 to 10 g / square meter. When a drug containing a pyrethroid compound as an active ingredient is used as a preservative, a mixture of a vinyl acetate resin emulsion and a urea resin or a melamine urea co-condensation resin is preferably used as an adhesive.

The sandwich structure of the synthetic resin foam board and the wood fiber board used in the present invention can be achieved by means of sticking each other or two wood fiber boards facing each other with a gap provided therebetween. It can be obtained by any means for injecting a resin and foaming. As resin material, foamed polyurethane, foamed phenol, foamed urea,
A thermosetting resin such as foamed melamine or foamed polystyrene foamed polyethylene is used.

In the present invention, means for applying a paint containing a preservative is further applied to the four surfaces except the outer surfaces of both sides of the building structural surface material. By applying these paints, the medicinal effect against termites and the like expected in the present invention can be achieved over the entire surface material, and the structure can withstand long-term use as a surface material due to the waterproof and moisture-proof properties of the paint.

[0016] Further, a means of selectively adhering the sheet-like material only to the outer surface of the wood fiberboard on one side and applying a paint containing a preservative to the outer surface of the wood fiberboard on the other side is also selectively used. ing. In particular, when the face material of the present invention is used as a base material for a roof, it is required to prevent not only the heat insulating property, the moisture-proof property and the waterproof property but also the prevention of the worker from falling and the roof base material from slipping. Thus, when used as a roof base material, the exposed surface of the wood fiberboard is entirely coated with a paint containing a preservative on the other side instead of the sheet-like material. As the paint, a resin used for an adhesive can be used. Further, as a further anti-slipping method, a means of performing anti-slipping processing on the surface of the paint is also used. As the non-slip processing, a paint is applied with a roller brush or the like to form a concavo-convex pattern, or a wood powder, a rubber chip, or the like is sprayed before the paint is applied and dried to provide a non-slip function. At this time, it is preferable that the static friction coefficient is 0.7 or more.

[0017]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below. First, a production line as a standard method for obtaining a wood fiber board by a dry method according to the present invention mainly includes a high-pressure defibration process for defibrating wood fibers, a blow line process for flash-drying defibrated fibers, and a fiber The process consists of a high-speed blending step of mixing the adhesive and the adhesive, and a hot-pressing step of the plate making. In these steps, the adhesive and the fiber are mixed in the blow line step immediately after the high-pressure defibration step, in the high-speed blending step after drying the fiber in the blow line step, or by a combination thereof. FIG. 1 shows the wood fiberboard thus obtained cut and applied to the product of the present invention. In the figure, reference numeral 1 denotes a synthetic resin foam plate existing as a core material at the center, and 2a and 2b denote wood fiber boards provided on both sides of the synthetic resin foam plate 1, respectively. 8-1.4
A hard rock bed layer A having a specific gravity that transits at a specific gravity, and a medium-density fiber layer B having a density lower than 0.8 in specific gravity are provided on the outside thereof. The medium-density fiber layer B is obtained by cutting and exposing the precure layer on the surface after cooling and stabilizing the fiberboard obtained by hot pressing. Reference numerals 3a and 3b denote sheets attached to the outside of the wood fiber boards 2a and 2b, respectively. 4a and 4b are the sheet-like materials 3a and 3b
3A and 3B show the layers of the adhesive to be attached to 2a and 2b. 5
a and 5b are wood fiber boards 2a and 2b and synthetic resin foam board 1
This is a preservative-containing adhesive provided to improve the adhesiveness of the synthetic resin foam board 1 and prevent erosion of termites and the like from the synthetic resin foam board 1 on the wood fiber board 2. The foaming mode of the synthetic resin foam plate 1 may be closed cells or open cells, but the closed cells are more excellent in heat insulation and soundproofing. Also, if the plate thickness is 2.5 cm or more, impact resistance,
Adiabatic sound absorption can be greatly improved. Furthermore, even when the synthetic resin foam plate 1 is formed by an injection method,
By applying an adhesive containing a preservative in advance to the inner surfaces of the wood fiber boards 2a, 2b, it is necessary to further strengthen the bonding between the two and simultaneously ensure the protection of the wood fiber boards 2a, 2b. is there. The specific gravity of the portion of the wood fiber board that comes into contact with these interfaces is appropriately selected depending on the type of synthetic resin foam board used in the range of 0.35 to 0.8 and the properties of the adhesive.

The sheets 3a and 3b use a laminated sheet of aluminum foil or the like on one side and a moisture-proof paper on the other side. Examples of the moisture-proof paper include synthetic resin-impregnated sheets such as polyethylene sheets, polyvinyl chloride sheets, and polypropylene sheets, as well as kraft paper, and further include a polyvinyl chloride sol-like paste containing a preservative, and a vinylidene chloride resin emulsion. Is directly applied to the surface side of the wood fiber boards 2a, 2b. Such moisture-proof paper has a moisture permeability coefficient of 0.8 to 1.
Compared with a wood fiber board of ² g / m ² hhg, it absorbs much less moisture. Therefore, by adopting this embodiment, even if there is a difference in water vapor pressure between the front and back of the board, moisture does not permeate. In addition, a metal sheet such as an aluminum foil on one side has an electromagnetic wave shielding effect and effectively functions as a magnetic shield of a building. Further, the surface of the sheet may be subjected to embossing of unevenness or non-slip processing by applying a resin.

Instead of the above-described embodiment, a waterproof and moisture-proof paint mixed with a preservative without adhering a sheet-like material to any of the wood fiberboards 2a and 2b or any one of them. May be applied for protection. In this case, the surface of the paint may be embossed with irregularities, or may be sprinkled with silica sand, resin powder, or rubber chips to prevent slippage. Even if processed in this way, CN
Even if the nail is nailed with a -50 nail, the initial nailing is good, and even if the nail head is sunk to the same level as the plate surface,
The bedrock is not destroyed. Although not shown, paint containing a preservative may be applied in the same manner to four widthwise surfaces including the wood end surfaces X and Y in FIG.
In this case, the entire six surfaces are protected from the outside.

Next, this embodiment will be described more specifically.
The wood fiber board manufactured in the usual process is subjected to a surface treatment step until the appearance of a medium specific gravity layer having a specific gravity of 0.35 to 0.8 on the outer side of the rock layers on the front and back surfaces. It was cut with sandpaper. Then, a preservative-containing urethane adhesive is applied at 50 to 300 g / m ² , and two pieces of the obtained wood fiber board are adjusted to face each other with a gap in a range of 2.5 to 15 cm. Insoluble hard urethane was injected and foamed. At that time, a separator was interposed between the two wood fiber boards, and pressure was applied from the outside of the board to prevent the structure from expanding due to urethane foaming. Thereafter, the sheet was adhered to at least one of the wood fiber boards provided on both sides with an adhesive containing a preservative. The structure thus obtained was subjected to an impact test according to BTL NS07, and a sand bag weighing 30 kg was dropped from a height of 50 cm and 100 cm, and compared with a single LME-90 subjected to the same test. . As a result, the height of LME-90 alone is 100 cm.
There was a hole due to falling from the surface, but only a dent appeared on the surface of this product. In addition, when it fell from a height of 50 cm, a dent appeared in LME-90, whereas this product maintained a good surface state.

[0021]

[Example] Wood fiber board: The pre-cured layer of the wood fiber board after hot pressing is removed, and a medium density layer having a specific gravity of 0.35 to 0.8 appears on the outside of the rock layers on the front and back. # 80
Finished with sandpaper. Such a sheet material thus obtained was cut into 90 × 180cm, one surface subjected to urethane adhesive of Shinto Neo Lambert MC0.8% mixed with 70 g / m ^2, side by side two pieces of this, 2 therebetween. 5
A void was formed using a square piece of cm square as a separator, and water-foamable hard urethane was injected to foam. Thereafter, the operation conditions of the roll press were set at a line speed of 20 m / min, and PET was sandwiched on one side with an aluminum foil using a urethane-based adhesive containing 0.8% of Syntone Neo Lambert MC.
A sample was obtained by attaching the film to the other side and a paper sheet sandwiched with polyethylene using a vinyl acetate emulsion-based adhesive mixed with the same agent. Table 1 shows the physical properties of this sample.

[0022]

[Table 1]

(Termite test) A surface-treated PET film laminated with aluminum foil was coated with Syntone Neo Lambert MC.
100 g / sq.m. Of an epoxy-based adhesive mixed with 0.8% (shifenthrin-based, manufactured by Shinto Fine Co., Ltd.), adhered to the above-described product at a pressure of 3.5 kg / cm ² ,
A test piece was obtained by cutting into mm × 10 mm. The test insects were house termites and released on a test medium of Ishikawa Wright (sand) under breeding conditions of 26 ° C. Specifically, 75 g of Ishikawa Wright and 25 g of water are weighed in a container having a diameter of 8 cm and a depth of 5 cm, and a test piece after measuring the mass before the test is placed thereon. Then, 200 craft ants and 20 soldier ants were released into the container, and they were kept standing in a dark place for 28 days. After the elapse of the period, the test piece was taken out of the container, the attached matter on the test piece surface was carefully removed, dried to the same condition as the measurement before the test, and then weighed. At the same time, a similar test was performed on a blank fiberboard to which no sheet material was attached. As a result, the termite mortality was only 5% and the mass reduction rate was 7.5% in the blank fiberboard, whereas the test piece had the mortality rate of 100% and the mass reduction rate. Was also reduced to 3.3%. This is presumably because the termites were exterminated relatively early in the test specimen.

(Durability test) As a test piece, 30 mm in length and width
The same product as the termite control test of × 30 mm, and 4
A test piece having a surface sealed with an epoxy resin was produced, and a beech sapwood of the same size without the addition of a chemical was produced as a control piece. The test was carried out for two months in accordance with the Japan Wood Preservation Association Standard No. 3 “Wood resistance test of woody materials” as a test condition. Table 3 shows the test results. In addition,
In the table, mass reduction rate (X) = {(mass before decay−mass after decay) / mass before decay} × 100, and decay resistance = (1
00-average mass loss of sample specimen / 100-average mass loss of control specimen.

[0025]

[Table 2]

As a result of the test, it was confirmed that the test piece achieved extremely good decay resistance as compared with the control piece.

[0027]

According to the present invention, a wood fiber board is bonded to both sides of a core made of a synthetic resin foam board via an adhesive containing a preservative, and at least one outer surface of these wood fiber boards is bonded. The sheet-like material is attached with an adhesive containing a preservative, and the outside of the wood fiber board is exposed to a layer having a lower specific gravity than the bedrock layer outside the bedrock layer. The foam plate thus obtained exhibited effects such as heat insulation and soundproofing, and could be used as a surface material having a wide range of application. In addition, it is a durable material having a structure that can sufficiently guarantee the strength as a building structural surface material, and at the same time, is excellent in termite-prevention, antiseptic, and antifungal properties. Furthermore, when a preservative is also contained in the adhesive used in the blending process when obtaining a wood fiber board, the medicinal effect will be distributed throughout the fiber board, and the effect of the preservative will be exhibited more. .

Further, by adhering a sheet or a moisture-proof paper, the moisture content of the fiberboard can be adjusted, and the active ingredient of the drug stays on the face material for a long time by these sheets. From
It could be made very suitable as a structural material.

Further, 4 excluding both outer surfaces of the building structure facing material
By applying a paint containing a preservative further to the surface, the entire surface material was completely covered, and it could function as a stable structural material for a long time with little influence from the outside .

Further, in a configuration in which the sheet-like material is adhered only to the outer surface of the wood fiber board on one side and a paint containing a preservative is applied to the outer surface of the wood fiber board on the other side, the coated surface is processed. By doing so, the anti-slip effect can be exhibited, and a non-slip structural material can be provided as a scaffold. Therefore, it has become possible to provide a surface material having an optimal structure as a roof base material.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing one embodiment of a face material of the present invention.

[Explanation of symbols]

 A Rock bed layer 1 Synthetic resin foam board 2a ・ 2b Wood fiber board 3a ・ 3b Sheet material 4a ・ 4b Adhesive layer 5a ・ 5b Preservative-containing adhesive

 ──────────────────────────────────────────────────続 き Continued on the front page F-term (reference) 2B002 AA12 AA13 BA01 BB06 BB07 BB12 DA01 DA02 DA06 2B250 AA03 AA05 AA06 BA06 BA07 BA08 CA11 DA04 EA02 EA13 FA21 FA28 FA31 FA33 FA37 FA45 GA03 2B260 AA01 AA01 CB01 CD02 CD03 CD04 CD05 CD22 DA01 DA02 DA03 DA04 DA05 DA06 DA07 DA08 DA09 DA12 DA17 DC20 DD02 EA05 EB02 EB06 EB11 EB19 EB21 2E162 CA00 CB24 CC06 CC08 CD09 CD10 EA03 EA05 EA11

Claims (9)

[Claims] 1. A wood fiber board is bonded to both sides of a core material made of a synthetic resin foam board via an adhesive containing a preservative, and a preservative is applied to at least one outer surface of these wood fiber boards. A sheet material for a building structure, wherein a sheet-like material is adhered with an adhesive contained therein, and a layer having a lower specific gravity than the rock layer is exposed outside the rock layer on the outside of the wood fiber board. 2. The face material for a building structure according to claim 1, wherein a preservative is also contained in the adhesive used in the blending step of the wood fiber board. 3. Sheet-like materials include synthetic resin sheets such as polyethylene sheets, vinyl chloride sheets and polypropylene sheets, metal sheets such as aluminum foil and copper foil, aluminum resin laminated films, aluminum sand paper, asphalt felt, roofing and the like. One sheet material selected from the group consisting of bituminous sheets, rubber sheets, or resin impregnated paper obtained by impregnating kraft paper, tissue paper, nonwoven fabric, recycled paper, etc. with a resin, or synthetic resin as a core material The face material for a building structure according to claim 1, which is: 4. The face material for a building structure according to claim 1, wherein the preservative is a drug containing a pyrethroid compound as an active ingredient. 5. The face material for building structures according to claim 4, wherein the pyrethroid compound is bifenthrin or cyphenothrin. 6. The adhesive includes a phenol resin, a resorcinol resin, a phenol melamine resin, a urea resin,
Melamine resin, urea melamine cocondensation resin, vinyl acetate copolymer emulsion, epoxy resin, polyurethane resin, ethylene vinyl acetate copolymer emulsion, polyvinyl alcohol resin, acrylic resin, aqueous polymer isocyanate resin, α-olefin The face material for a building structure according to claim 1, wherein the face material for a building structure is one or a mixture of two or more selected from the group consisting of a maleic anhydride resin and a rubber type. 7. The four surfaces except for both outer surfaces of the building structural surface material include:
The face material for a building structure according to claim 1, further comprising a paint containing a preservative. 8. The sheet-like material is applied only to the outer surface of one side of the fiberboard, and the outer surface of the other side of the fiberboard is coated with a paint containing a preservative. The face material for a building structure as described. 9. The face material for a building structure according to claim 8, wherein the surface of the paint provided on the outer surface of the wood fiber board on the other side is further subjected to anti-slip processing.