JP2019069538A - Wood article and method for manufacturing the same - Google Patents

Abstract

To provide a wood article that shows a feeling of a wood on its appearance and is excellent in water proofness and weatherability.SOLUTION: A wood article 10 applied with the invention has a wood 12 and a translucent film 30 provided on a surface 12a of the wood 12. The translucent film 30 comprises at least one acrylic resin selected from an acrylic resin and acrylic silicone resin, or a polyurethane resin, the thickness of the translucent film 30 is 0.1 mm or more and 2.0 mm or less, the elongation rate of the translucent film 30 is 100% or more and 600% or less, and the crack followability of the translucent film 30 is 2 mm or more and 8 mm or less.SELECTED DRAWING: Figure 1

Description

  The present invention relates to wooden articles and methods of making wooden articles.

  Wood has a unique warmth, a beautiful grain pattern, a pleasant touch, etc., and has a great effect on the relaxation effect etc. For this reason, conventionally, wood is widely used in buildings such as houses and child welfare facilities, playground equipment and benches in parks, and the like.

  However, wood is susceptible to decay due to weather deterioration and biological pollution, or the effects of surrounding environment, air and ground fungi, etc. Wood and wood that are directly exposed to the outside without being subjected to surface treatment, etc. The articles are often exchanged or removed when a predetermined number of years (for example, three to five years, etc.) have passed.

  With regard to wood used for housing, for example, Patent Document 1 discloses a wall structure (wood article) provided with a waterproof sheet on the outdoor side of wood used as a wall base material. Also, for example, in Patent Document 2, a fiberglass reinforced plastic (FRP) waterproof layer is laminated on at least one base selected from concrete, asphalt concrete, mortar, metal, etc., including wood. A structure is disclosed.

JP, 2005-36451, A JP, 2008-88294, A

  However, when a conventional tarpaulin is laid on the surface of the wood on the outdoor side (that is, the surface exposed to the outside), the distinctive warmth and texture of the wood can be seen on the outdoor side because the tarpaulin is colored and thick. It will be gone. For example, in the waterproof sheet of Patent Document 1 described above, due to the structure of the sheet, the texture of the wood to be the base hardly appears on the outside of the waterproof sheet. Moreover, since the FRP waterproof layer of the structure of the above-mentioned patent document 2 contains a color pigment, the texture of the wood used as a foundation does not appear on the surface (outside) of a FRP waterproof layer. Furthermore, when the wood expands and contracts under the influence of temperature change inside and outside the room, or when it is cracked, the above-mentioned waterproof sheet or FRP waterproof layer may not follow the deformation of the wood and may be detached from the wood. there were.

  Moreover, a paint etc. may be directly applied to the surface of the outdoor side of wood, without using a waterproof sheet or a FRP waterproof layer. Also in this case, (1) the texture of the wood hardly appears on the appearance, (2) the film by the paint does not follow the expansion, contraction, or cracking of the wood, and is partially cut, substantially as in the case of using the above-mentioned waterproof sheet And (3) there is a problem that it is necessary to repaint the entire surface after about five years in order to peel off the wood. That is, in the prior art, it is difficult to maintain the texture of wood for a long period of time, and it is difficult to maintain good adhesion between the wood and the paint of the wood and the like, which are directly exposed outdoors. There was a problem that.

  The present invention has been made in view of the above circumstances, and provides a wood article having a waterproofness and a weather resistance and a method for producing the wood article, while giving the appearance of wood texture to the appearance.

  Unpainted wood and wood articles that are directly exposed to the outdoors undergo apparent changes after one to two years. Apparent changes in wooden articles are classified as "whitening" and "greying" due to weather degradation, and "blackening" due to biological contamination. "Whitening" is a phenomenon caused by degradation of lignin, which is one of the main components of wood, mainly by ultraviolet light, and low-molecular products are drained by rainwater, and "greying" is also a phenomenon that occurs similarly to lignin. Is a phenomenon caused by the coloring component generated by the photooxidation of "Blacking" is a phenomenon in which fungal decay progresses after fungal contamination mainly by reproduction of black yeast (Aureobasidium Pullulans). The present inventor (1) forms a thick coating film with high crack followability which is not in the conventional coating material and without pinholes, and prevents the penetration of rain water, the moisture content of the wooden article becomes black yeast And the like. The transparent coating film and the transparent coating film capable of preventing blackening due to biological contamination as well as preventing decay by fungi, and which do not easily discolor or decrease in transparency. It is found that wood and wood articles having the same can be obtained, and (2) if a coating is formed on the surface with a transparent coating material compounded with an ultraviolet absorber, “whitening” and “greying” due to weather deterioration The present invention has been completed focusing on the fact that it can be prevented.

  The wooden article according to claim 1 has wood and a transparent coating film provided on the surface of the wood, and the transparent coating film is at least one acrylic resin selected from acrylic resin and acrylic silicone resin. Or, it contains a polyurethane resin, the thickness of the transparent coating is 0.1 mm or more and 2.0 mm or less, the elongation of the transparent coating is 100% or more and 600% or less, and the cracks of the transparent coating are The followability is characterized by being 2 mm or more and 8 mm or less (when the thickness is about 0.5 mm).

  According to the above-described configuration, the transparent coating film is mainly made of at least one acrylic resin (hereinafter sometimes referred to simply as "acrylic resin") selected from acrylic resin and acrylic silicone resin, or polyurethane resin as the main component. By doing this, the resistance of the transparent coating film to ultraviolet light is enhanced, it is difficult to discolor even when the transparent coating film is irradiated with sunlight, and it is also difficult to deteriorate the transparency and the like. Thus, by the fact that the coating film provided on the surface of the wood is transparent, the texture of the wood appears to the appearance through the coating film, and the wood is protected. Also, as described above, when the transparent coating film is mainly made of acrylic resin or polyurethane resin, since the transparent coating film has an appropriate elongation rate, it easily follows the expansion and contraction of wood, and Adhesion fatigue due to different movements is less likely to occur, and the possibility of reduced adhesion is reduced. Furthermore, by applying an appropriate viscosity to the coating material before film formation, the thickness of the transparent coating film after film formation is maintained at 0.3 mm or more and 1.5 mm or less. When ensuring and apply | coating with coating tools, such as a brush, it is difficult to make uniform coating-film thickness, and it is difficult to avoid that a brush nonuniformity or coating nonuniformity arises. However, according to the present invention, by applying an appropriate viscosity to the transparent coating (that is, the coating material) before film formation, if the brush unevenness or the coating unevenness is generated in the direction of the wood grain, the transparent coating side The problem was solved by the person who saw the wooden article from the illusion of uneven brushing or coating unevenness with the grain of the wood and not feeling discomfort.

In the present invention, "acrylic resin" means a polymer obtained by polymerizing a monomer selected from the group consisting of (meth) acrylate and (meth) acrylic acid and the group modified with silicone and those. . In the present invention, "(meth) acrylate" means acrylate or methacrylate, and "(meth) acrylic acid" is also the same.
Examples of (meth) acrylates include methyl (meth) acrylate, ethyl (meth) acrylate, butyl (meth) acrylate, ethylene glycol di (meth) acrylate, 1,2-propylene glycol di (meth) acrylate and the like.
As (meth) acrylic acid, methyl (meth) acrylate, butyl (meth) acrylate and the like can be mentioned.

  In the present invention, the "polyurethane resin" means that a diol and an isocyanate compound are urethane-bonded. Examples of the diol include aliphatic diols having 2 to 10 carbon atoms such as ethylene glycol, propylene glycol, 1,4-butanediol, dimethylolpentane and dimethylolheptane, and alicyclic diols such as diethylene glycol and dipropylene glycol . These diols may be used alone or in combination of two or more. As an isocyanate compound, a 2, 4- tolylene diisocyanate, 2, 6- tolylene diisocyanate etc. are mentioned. These isocyanate compounds may be used alone or in combination of two or more.

  The wooden article according to claim 2 is characterized in that the transparent coating further comprises a UV absorber.

  According to the above-described configuration, it is possible to prevent the weather deterioration of wood by blending the ultraviolet absorber into the transparent coating film. Thickening the transparent coating and enhancing the effect of the UV absorber are also effective for protecting wood. In addition, when lignin is decomposed mainly by ultraviolet light and molecular weight is reduced, the strength of the surface is reduced to cause peeling of the coating film, but the deterioration is also prevented by the ultraviolet absorber contained in the transparent coating film. can do.

  The wood article according to claim 3 is characterized in that a primer layer is provided between the wood and the transparent coating.

  According to the above-mentioned composition, the degree of adhesion of wood and a transparent coat can be raised, and a fall of the adhesive power of a transparent coat by aging can be prevented.

  The method for producing a wooden article according to claim 4 is a method for producing the above-mentioned wooden article, wherein at least one acrylic resin or polyurethane resin selected from acrylic resin and acrylic silicone resin is provided on the surface of the wood. Coating the coating material containing the above to form the transparent coating film.

  According to the above-mentioned configuration, it is excellent in transparency to sunlight, easily follows expansion and contraction of wood, and has a thickness of 0.1 mm or more and 2.0 mm or less on the surface of wood, A transparent coating film excellent in waterproofness and weather resistance can be formed.

  The method for producing a wooden article according to claim 5 is characterized in that the coating material is applied along the wood grain of the wood.

  According to the above-described configuration, it is possible to harmonize the coating unevenness of the coating material with the wood grain of the wood so as not to make the unevenness visible when looking at the wooden article.

  ADVANTAGE OF THE INVENTION According to the manufacturing method of the wooden article which concerns on this invention, and a wooden article, while appearing in the appearance of the texture of wood, the wooden article excellent in waterproofness and a weather resistance can be provided.

It is a partially expanded perspective view of a wooden article to which the present invention is applied.

  Hereinafter, embodiments of a wooden article and a method of manufacturing the wooden article to which the present invention is applied will be described. The drawings referred to in the following description are schematic, and the ratios of length, width, and thickness, etc. are not necessarily the same as actual ones, and can be changed as appropriate.

  As shown in FIG. 1, the wooden article 10 of the present embodiment includes a wood 12 and a transparent coating 30 provided on the surface 12 a of the wood 12.

  The wooden article 10 is not particularly limited as long as it can be constructed using wood. The wooden article 10 includes all wooden gates, outer walls, etc., or benches, tables, etc. In addition, as the wooden article 10, the article which can be installed outdoors is preferable.

  The wood 12 is not particularly limited to the type of wood, and may be, for example, cedar, cypress or the like, and is preferably wood suitable for construction materials or furniture.

  The transparent coating film 30 contains an acrylic resin or a polyurethane resin. When the transparent coating film 30 contains an acrylic resin or a polyurethane resin, the transparency of the transparent coating film 30 to sunlight is favorably obtained. In the present invention, “transparent to sunlight” means that the transmittance is 90% or more and 100% or less in a wavelength band of 400 nm or more and 700 nm or less which is visible light among sunlight. The transmittance of the transparent coating film 30 is preferably 95% or more, and more preferably 98% or more in a wavelength range of 400 nm to 700 nm.

  The transparent coating film 30 is mainly made of an acrylic resin or a polyurethane resin from the viewpoint of reliably improving adhesion with the wood 12 and the primer layer 20 described later and preventing deterioration due to ageing. preferable.

  The thickness of the transparent coating film 30 is 0.1 mm or more and 2.0 mm or less, and preferably 0.3 mm or more and 1.5 mm or less. In the present invention, in consideration of the presence of unevenness peculiar to wood on the surface 12 a of the wooden article 12, “the thickness of the transparent coating 30” is an average thickness of the transparent coating 30 along the surface direction of the surface 12 a. Represents thickness. By the thickness of the transparent coating 30 being in the above-mentioned range, the weather resistance of the wooden article 10 is enhanced.

  The elongation of the transparent coating film 30 is 100% to 600%, preferably 200% to 600%, and more preferably 300% to 500%. In the present invention, the tensile strength is based on the “elongation rate” (temperature at test 23 ° C.) in JIS A 6021. By setting the elongation of the transparent coating 30 within the above range, breakage of the transparent coating 30 and entry of moisture between the transparent coating 30 and the wooden article 12 can be reliably prevented.

  When the thickness of the transparent coating 30 is about 0.5 mm, the crack followability of the transparent coating 30 is 2 mm or more and 8 mm or less, preferably 3 mm or more and 6 mm or less, and 3 mm or more and 5 mm or less More preferable. When the crack followability of the transparent coating 30 is within the above-mentioned range, the transparent coating 30 easily follows the expansion and contraction of the wood 12, and adhesion fatigue due to movement different from that of the wood 12 does not easily occur. There is a low possibility that the adhesion of the transparent coating 30 will be reduced.

  As shown in FIG. 1, a primer layer 20 may be provided between the wooden article 12 and the transparent coating 30. By providing the primer layer 20, it is possible to prevent the decrease in adhesion of the surface 20a of the primer layer 20, that is, the transparent coating film 30 due to the aging. The primer layer 20 is not particularly limited as long as it is transparent to sunlight, and may be known. The thickness of the primer layer 20 is preferably about 0.01 mm. The primer layer 20 can be omitted.

  Moreover, the top coat layer 40 may be provided on the surface 30 a of the transparent coating film 30. By providing the top coat layer 40, it is possible to prevent the deterioration of the transparent coating 30 due to the passage of time and the damage of the surface 30a of the transparent coating 30. The top coat layer 40 is not particularly limited as long as it is transparent to sunlight, and may be a known one. The thickness of the primer layer 20 is preferably about 0.01 mm. The thickness of the top coat layer 40 is preferably about 0.05 mm. The top coat layer 40 can be omitted.

  Next, a method of manufacturing the wooden article of the present embodiment will be described with reference to FIG. The method for producing a wooden article according to the present embodiment is a method for producing the above-described wooden article 10, and a coating material mainly composed of an acrylic resin or a polyurethane resin is applied to the surface 12a of the wood 12 A film 30 is formed.

  Specifically, in the method for producing a wooden article according to the present embodiment, first, the primer liquid constituting the primer layer 20 is applied to the surface 12 a of the wooden article 12. The primer layer 20 is formed by drying the applied primer solution for a predetermined time. It is preferable to use a dedicated primer as the primer solution.

  Subsequently, a first coating material (that is, a coating material mainly composed of an acrylic resin or a polyurethane resin) is applied to the surface 20 a of the primer layer 20.

The coating material is an acrylic resin or polyurethane resin dispersed in a dispersion medium.
Examples of the dispersion medium include water; and organic solvents such as alcohol, glycol, toluene and xylene. Among them, as the dispersion medium, water or a mixture of water and an organic solvent is preferable, and water is preferable. The content of the acrylic resin in the coating material is preferably 30% by mass to 60% by mass, and more preferably 40% by mass to 50% by mass. The content of the dispersion medium in the coating material is preferably 30% by mass to 70% by mass, and more preferably 40% by mass to 60% by mass.

  The coating material may contain additives in addition to the acrylic resin and the dispersion medium. As an additive, a coalescent, a thickener, an antifoamer, an ultraviolet absorber etc. are mentioned. The content of the additive in the coating material is preferably 1% by mass or more and 10% by mass or less.

  When the coating material is applied to the surface 20 a of the primer layer 20, the coating material is preferably coated along the wood grain of the wooden article 12. Thereby, the coating unevenness is harmonized with the wood grain, and the coating unevenness becomes inconspicuous when viewed from the outside of the wooden article 10 (that is, the outdoor side). Thereafter, the first coating material is dried for a predetermined time.

  Subsequently, a second coating material is applied to the surface of the first dried transparent coating film. The second coat material may be the same as the first coat material. After that, the second coat material is dried for a predetermined time to form the transparent coating film 30.

  Although the thickness of the transparent coating film 30 can be made 0.1 mm or more and 2.0 mm or less by applying the coating material approximately twice, even if the coating material is applied once or three or more times as needed. Good. The method and the number of times of providing the coating material on the surface 20 a of the primer layer 20 can be appropriately adjusted.

  According to the wooden article 10 of the present embodiment described above, the transparent coating film 30 is mainly made of an acrylic resin or a polyurethane resin to enhance the resistance of the transparent coating film 30 to ultraviolet light, and the surface of the wooden article 12 The coating material covering 12a can be transparent to sunlight. Thereby, the texture of the wood of the wooden article 12 can be revealed to the appearance through the transparent coating 30, and the wooden article 12 can be protected.

  Moreover, according to the wooden article 10 of the present embodiment, the transparent coating film 30 has an appropriate elongation rate. As a result, the transparent coating film 30 can easily follow the expansion, contraction, and the like of the wood 12 and can be in close contact with the wood 12 with flexibility. In addition, since the transparent coating film 30 has appropriate elongation characteristics, breakage, breakage, and the like of the transparent coating film 30 are prevented, so the moisture and the like from the outer side (the appearance, the outdoor side) of the transparent coating film 30 to the wood 12 Infiltration of moisture can be prevented, and deterioration and decay of the wood 12 can be reliably prevented. Furthermore, the thickness of the transparent coating film 30 is set to 0.1 mm or more and 2.0 mm or less, preferably 0.3 mm or more and 1.0 mm or less, as described above, by giving an appropriate viscosity to the coating material, and sufficient thickness The impact resistance of the wooden article 10 can be enhanced by the transparent coating 30 having the

  Moreover, according to the wooden article 10 of the present embodiment, the transparent coating film 30 absorbs the ultraviolet rays irradiated to the transparent coating film 30 from the outside (that is, the outdoor side) of the wooden article 10 by including the ultraviolet absorber. At the same time, it is possible to minimize the reach of the ultraviolet light to the wood 12 and to prevent the "whitening" and "greying" of the wood 12 due to weather deterioration.

  According to the wooden article 10 of the present embodiment, by providing the transparent coating 30 on the surface 12 a of the wood 12 as described above, the long-term availability of the wooden article 10 is enhanced, and the wooden article exhibits unique texture. 10 outdoor installation can be promoted and the frequency of maintenance of the wooden article 10 can be reduced.

  Although the preferred embodiments of the present invention have been described above in detail, the present invention is not limited to the specific embodiments, and various modifications may be made within the scope of the present invention as set forth in the appended claims. Changes are possible.

  For example, the surface 30a of the transparent coating 30 may be provided with a cosmetic coating that is transparent to sunlight and has a lower tensile strength and elongation than the transparent coating 30. The tensile strength and elongation rate of the decorative coating film are such that they do not prevent the transparent coating film 30 from extending in response to the expansion and contraction of the wood of the wooden article 12, and the extent to which dirt, dust, dirt and the like do not easily adhere It is preferable to set to. The elongation percentage of the decorative coating may be, for example, about 20% to 50% of the elongation of the transparent coating 30.

  In addition, by using a film having a matting effect as a cosmetic coating, the wooden article 10 in the area provided with the cosmetic coating has no gloss, and the wooden article 10 in the area not provided with the cosmetic coating has a gloss Get out. Moreover, even if it is the same transparent coating material and a makeup coating solution, both after application can be easily distinguished. Therefore, the texture (softness) of the wood 12 can be more faithfully exhibited in the appearance and the designability and quality of the wooden article 10 can be enhanced as compared with the case where the cosmetic coating film is not used, and the cosmetic The effect of being able to identify the uncoated part of a coating film easily, and the effect that a decorative coating can be reliably provided with respect to the desired area | region (for example, front) of the surface 30a of the transparent coating 30 is acquired.

  Then, the Example of the manufacturing method of the above-mentioned wooden article 10 and a wooden article is described. In addition, the structure and effect of the manufacturing method of the wooden article 10 which concerns on this invention, and a wooden article are not limited to a following example.

  In order to support the elongation and characteristics of the transparent coating 30 of the wooden article 10 described above, a test body having a structure similar to that of the wooden article 10 was prepared, and the zero span tension test and adhesion test were performed using the test body. .

Example 1
A cedar board (wood) measuring 75 mm × 100 mm × thickness 3 mm is prepared with the direction perpendicular to the wood grain vertical and the direction parallel to the wood grain horizontal, and a cutter knife at the center in the direction perpendicular to the wood grain of the cedar board. I made a cut of about 2 mm in depth along the grain of wood.

Next, brush a well-known primer solution (product name; aqueous Seven S sealer, manufacturer / seller; Seven Chemical Co., Ltd.) at a volume of about 0.1 kg / m ^{2 on} the surface of the cedar plate, and let stand for 2 hours in the room The layer was dried to form a primer layer. Subsequently, a mold frame with a depth of 1 mm is set in the range of 75 mm long × 50 mm wide on the surface of the primer layer, and a coat of about 1.0 kg / m ² (average film thickness: 0.5 mm) inside the mold frame Material (product name; Seven Court N, manufacturer; Seven Chemical Co., Ltd.) was leveled. The used coating material is mainly composed of an acrylic silicone resin, and the coating material contains, in addition to the acrylic silicone resin, water and an additive composed of a film forming aid, a thickener, an antifoaming agent and the like. The content of each of the acrylic silicone resin, water, and additives in the coating material was about 50% by mass, about 45% by mass, and about 5% by mass.

After the surface (upper surface) of the coating material was flattened and the coating material was formed, the transparent coating film was dried by standing in a room for 24 hours to form a transparent coating film on the surface of the primer layer. After demolding, brush the first top coat solution (cosmetic coating, product name; aqueous Seven S top, manufacturer / seller; Seven Chemical Co., Ltd.) at an amount of about 0.1 kg / m ^{2 on} the surface of the transparent coating It painted and it was made to dry by leaving it to stand indoors for 2 hours.

Furthermore, the second top coat solution (the product was the same as the first top coat solution) was brush-coated at an amount of about 0.1 kg / m ² , and was left to stand in a room for 7 days to be dried. Thus, a test sample A1 having the same configuration as the above-mentioned wooden article 10 and having the top coat layer 40 provided on the surface of the transparent coating film was produced.

  Moreover, in order to perform a zero span tension test twice, the test object A2 was created through the same process as the test object A1.

  Next, the test specimens A1 and A2 are bent with the cut formed on the back surface of each of the test specimens A1 and A2 described above and the cedar plate is broken so that the transparent coating does not break, and then a tensile tester (product Name: AUTOGRAPH, manufacturer: Shimadzu Corporation). The cedar plates divided previously were pulled at a speed of 2 mm / min in the direction of separating them from each other, and stopped when the transparent coating film started to break. As a result of conducting the zero span tension test in this way, the elongation was 3.0 mm for both of the test specimens A1 and A2.

Subsequently, a test sample A3 similar to the test sample A1 was prepared except that the primer layer was not formed, and a bond-on-demand test (N = 1) was performed on the test samples A1 and A3. As a result, the adhesion of the test specimen A1 was 1.7 N / mm ² , and the adhesion of the test specimen A3 was 2.3 N / mm ² . The failure mode in the test sample A1 was 100% of the interface failure rate between the primer layer and the transparent coating film, and the failure mode in the test body A3 was 100% of the interface failure ratio between wood and the transparent coating film.

(Comparative example 1)
About 0.2 kg / m of white alkyd resin paint (product name; cashew oil-based lacquer paint, manufacturer / seller; cashew corporation) under sunlight on the surface of the same cedar board used in Example 1. ^It was brushed with ² volumes and allowed to stand by drying for 1 hour in a room. Thereafter, the same alkyd resin paint was brush-coated at an amount of about 0.2 kg / m ^{2, and} allowed to stand in a room for 7 days to be dried to prepare a test body B1.

  As in Example 1, in order to perform the zero span tension test twice, a test body B2 was produced through the same steps as the test body B1.

  Next, the test pieces B1 and B2 were bent with the cut formed on the back surface of each of the test pieces B1 and B2 described above outside, and the cedar plate was broken. As a result, in both of the test specimens B1 and B2, the white coating film was broken when the cedar plate was broken.

  According to Example 1 and Comparative Example 1 described above, by forming a transparent coating film containing an acrylic silicone resin on the surface of wood made of cedar plate, the follow-up performance of 3.0 mm against the displacement of wood is obtained. We realized the coating material we have. Wood has the property of shrinking by about 3% in the width direction (direction perpendicular to the grain) with the passage of time. With such shrinkage, the conventional coating material is likely to be broken to follow the cracks of the wood or the widening of the gap between the joint portions of the cord members. If rainwater intrudes from such breakage, it is likely to cause discoloration or decay of the wood. Based on the results of the above-mentioned zero span tension test and adhesion test, the transparent coating film of the wooden article according to the present invention easily follows the expansion and contraction of wood, and cracks or bonds of about 0.3 to 0.5 mm or so It is thought that it is hard to break for a long period of time to widen the gap of the part, and while protecting wood reliably, it is possible to prevent discoloration and decay of wood.

  The weather resistance of the wooden article according to the present invention is not considered as an example, but a top coat material mainly composed of an acrylic silicone resin which is applied by double coating on a tiled outer wall for a long period of about 20 years It has been confirmed that no deterioration such as discoloration is observed even when exposed to the outdoors. In light of this, since the transparent coating film of the wooden article according to the present invention contains an acrylic resin, it is expected that it exhibits sufficient weather resistance.

  In the Kenken-type adhesion test of the test bodies A1 and A3 of Example 1, the adhesion of the test body A3 having no primer layer was higher than the adhesion of the test body A1 having a primer layer. This also shows that the primer layer can be omitted.

10 wooden article 12 wood 12a surface 20 primer layer 30 transparent coating film

Claims (5)

Wood,
A transparent coating film provided on the surface of the wood;
The transparent coating film contains at least one acrylic resin selected from acrylic resin and acrylic silicone resin, or polyurethane resin.
The thickness of the transparent coating film is 0.1 mm or more and 2.0 mm or less,
The elongation of the transparent coating is 100% to 600%,
The wooden article characterized in that the crack followability of the transparent coating film is 2 mm or more and 8 mm or less.   The wooden article according to claim 1, wherein the transparent coating film further comprises a UV absorber.   The wood article according to claim 1 or 2, wherein a primer layer is provided between the wood and the transparent coating. A method of producing a wooden article according to claim 1 or claim 2, wherein
A coating material containing at least one acrylic resin selected from an acrylic resin and an acrylic silicone resin, or a polyurethane resin, is applied to the surface of the wood to form the transparent coating film. Method.   The method for producing a wooden article according to claim 4, wherein the coating material is applied along the wood grain of the wood.

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