JP5954660B2 - Wood decorative board, method for producing wooden decorative board - Google Patents

Wood decorative board, method for producing wooden decorative board Download PDF

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JP5954660B2
JP5954660B2 JP2012171355A JP2012171355A JP5954660B2 JP 5954660 B2 JP5954660 B2 JP 5954660B2 JP 2012171355 A JP2012171355 A JP 2012171355A JP 2012171355 A JP2012171355 A JP 2012171355A JP 5954660 B2 JP5954660 B2 JP 5954660B2
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decorative board
laminated
single plate
wood
veneer
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JP2014030928A (en
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鈴木　伸一
伸一 鈴木
清好 山崎
清好 山崎
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Panasonic Intellectual Property Management Co Ltd
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Description

本発明は、床等の建材の表面化粧層となる木質化粧板とその製造方法に関するものである。   The present invention relates to a wooden decorative board that is a surface decorative layer of a building material such as a floor and a method for manufacturing the same.

基板の表面に表面化粧層となる木質化粧板が積層されて、床等の建材が構成されている（例えば特許文献１参照）。   A wooden decorative board serving as a surface decorative layer is laminated on the surface of the substrate to constitute a building material such as a floor (see, for example, Patent Document 1).

特開平８−８５１０２号公報JP-A-8-85102

ところで、上記木質化粧板は、床材に用いられる場合、厚みが大きい程、溝等（特に深い溝）が自在に加工可能となり、意匠性が向上する。   By the way, when the said wood decorative board is used for a flooring material, a groove | channel etc. (especially deep groove | channel) can be freely processed and the design property improves, so that thickness is large.

しかしながら、上記木質化粧板が床暖房用等の床材に用いられる場合、厚みが大きくなる程、加熱されて乾燥することにより収縮が発生し、この収縮によるクラックが発生し易くなってしまう。   However, when the wooden decorative board is used for flooring for floor heating or the like, the larger the thickness is, the more heat is generated and the shrinkage occurs due to drying, and cracks due to the shrinkage tend to occur.

本発明は上記従来の問題点に鑑みて発明したものであって、その目的とするところは、厚みがあり、且つ、加熱されてもクラックが発生し難い木質化粧板、木質化粧板の製造方法を提供することを課題とするものである。   The present invention was invented in view of the above-mentioned conventional problems, and the object of the present invention is a wooden decorative board that is thick and hardly cracks even when heated, and a method for manufacturing a wooden decorative board It is a problem to provide.

上記課題を解決するために、本発明は、以下のような構成とする。   In order to solve the above problems, the present invention has the following configuration.

木質材からなる単板が複数積層されてなる木質化粧板であって、それぞれの前記単板は、厚みが０．６ｍｍ以下となるように形成され、前記単板間のうちの少なくとも一の前記単板間に、不織布あるいは紙からなるクラック防止層が介在され、積層される、前記単板同士、および、前記単板と前記クラック防止層とが接着剤により接着されることを特徴とする。 A wood decorative board in which a plurality of veneers made of a wood material are laminated, each of the veneers being formed to have a thickness of 0.6 mm or less, and at least one of the veneers between the veneers Between the single plates, a crack preventing layer made of a nonwoven fabric or paper is interposed and laminated, and the single plates and the single plate and the crack preventing layer are bonded with an adhesive.

木質材がスライスされて形成される単板が複数積層されてなる木質化粧板の製造方法であって、それぞれの前記単板は、高温高圧水蒸気処理が施された前記木質材がスライスされて厚みが０．６ｍｍ以下となるように形成され、複数の前記単板が積層され、前記単板間のうちの少なくとも一の前記単板間に、不織布あるいは紙からなるクラック防止層が介在され、積層される、前記単板同士、および、前記単板と前記クラック防止層とが接着剤により接着されることを特徴とする。 A method of manufacturing a wood decorative board in which a plurality of veneers formed by slicing a wood material are laminated, each of the veneers being sliced from the wood material subjected to high-temperature and high-pressure steam treatment and having a thickness Is formed to be 0.6 mm or less, a plurality of the single plates are laminated, and a crack prevention layer made of nonwoven fabric or paper is interposed between at least one of the single plates, and laminated The single plates and the single plate and the crack prevention layer are bonded together with an adhesive.

本発明の木質化粧板にあっては、木質化粧板は意匠性を確保可能な厚みがあり、且つ、加熱されてもクラックが発生するのが抑えられる。   In the wooden decorative board of the present invention, the wooden decorative board has a thickness that can ensure designability, and the occurrence of cracks is suppressed even when heated.

また、本発明の木質化粧板の製造方法にあっては、単板は、高温高圧水蒸気処理が施された木質材がスライスされて形成されるため、スライス性が向上してスライス時にクラックが発生するのが抑えられる。   In the method for producing a wood decorative board according to the present invention, the veneer is formed by slicing a wood material that has been subjected to high-temperature and high-pressure steam treatment. It is suppressed to do.

本発明の木質化粧板を示し、（ａ）は分解斜視図であり、（ｂ）は断面図である。The wooden decorative board of this invention is shown, (a) is a disassembled perspective view, (b) is sectional drawing. 同上における単板の製造を説明する図であり、（ａ）はフリッチの集成前の分解斜視図であり、（ｂ）はフリッチの集成材をスライスして単板を切り出している状態を示す斜視図である。It is a figure explaining manufacture of the veneer in the same as the above, (a) is an exploded perspective view before assembling the flitches, (b) is a perspective view showing a state where the flake laminated material is sliced and the veneer is cut out FIG.

以下、本発明を添付図面に示す実施形態に基いて説明する。   Hereinafter, the present invention will be described based on embodiments shown in the accompanying drawings.

木質化粧板３は、図１に示すように、建材１の表面化粧層となるものである。建材１は、主に床材であるが、壁や天井等でもよく特に限定されない。建材１は、主に、基材２の表面に表面化粧層としての木質化粧板３が積層されて構成されるが、特にこのような構成に限定されない。   The wooden decorative board 3 becomes a surface decorative layer of the building material 1 as shown in FIG. The building material 1 is mainly a flooring material, but may be a wall or a ceiling and is not particularly limited. Although the building material 1 is mainly configured by laminating a wooden decorative board 3 as a surface decorative layer on the surface of the base material 2, it is not particularly limited to such a configuration.

木質化粧板３は、木質材からなる単板４が複数積層されてなるものである。単板４は、図２（ａ）に示すように、木材の角材よりなるフリッチ７が複数集成されて集成材８が形成され、図２（ｂ）に示すように、この集成材８がスライスされることで製造される。単板４は、厚みが０．６ｍｍ以下となるように形成される。木材からフリッチ７が生成される工程、フリッチ７が集成・接着されて集成材８が形成される工程、集成材８がスライスされる工程については、既知の様々な工程が適宜適用可能であり、詳細な説明は省略する。   The wooden decorative board 3 is formed by laminating a plurality of single boards 4 made of a wooden material. As shown in FIG. 2 (a), the veneer 4 is formed by assembling a plurality of flitches 7 made of timber squares to form a laminated material 8. As shown in FIG. 2 (b), the laminated material 8 is sliced. To be manufactured. The single plate 4 is formed to have a thickness of 0.6 mm or less. Various known processes can be appropriately applied to the process in which the flitch 7 is generated from the wood, the process in which the flitch 7 is assembled and bonded to form the laminated material 8, and the process in which the laminated material 8 is sliced. Detailed description is omitted.

フリッチ７は、大気と比較して高温および高圧の水蒸気処理（以下、高温高圧水蒸気処理という）により、褐色に着色される。フリッチ７は、褐色の濃さの異なるものが集成されることで、単板４に異なる濃さの色領域が複数形成されてモザイク状に見え、見栄えがよいものである。   The flitch 7 is colored brown by high-temperature and high-pressure steam treatment (hereinafter referred to as high-temperature and high-pressure steam treatment) compared to the atmosphere. The flitch 7 is formed of a collection of different brown shades, so that a plurality of color regions with different shades are formed on the single plate 4 to look like a mosaic and look good.

フリッチ７の原材料となる木材には、フェノール等の酸化され易い成分が含有されている。このフェノール等の成分は、所定の高温の処理温度（１０５℃以上）の雰囲気下で所定の処理時間加熱処理されることで、褐色に発色する。なお、前記処理温度における乾燥した雰囲気下では、フリッチ７に割れが発生したり、均一に着色しない惧れがある。このため、高温高圧水蒸気処理が好ましいものである。   The wood that is the raw material of the flitch 7 contains components that are easily oxidized, such as phenol. This component such as phenol is colored brown by being heated for a predetermined processing time in an atmosphere at a predetermined high processing temperature (105 ° C. or higher). In the dry atmosphere at the processing temperature, there is a possibility that the flitch 7 may be cracked or not uniformly colored. For this reason, high-temperature and high-pressure steam treatment is preferable.

高温高圧水蒸気処理では、処理温度および処理時間により、フリッチ７の褐色の濃さが変わってくる。高温高圧水蒸気処理における処理時間が略同一の場合には、処理温度が高い程、褐色の濃さは濃くなる。また、高温高圧水蒸気処理における処理温度が略同一の場合には、処理時間が長い程、褐色の濃さは濃くなる。   In the high-temperature and high-pressure steam treatment, the darkness of the flitch 7 varies depending on the treatment temperature and treatment time. In the case where the processing time in the high-temperature and high-pressure steam processing is substantially the same, the brown color becomes darker as the processing temperature is higher. Moreover, when the processing temperature in the high-temperature and high-pressure steam processing is substantially the same, the darker the darkness becomes, the longer the processing time is.

そして、高温高圧水蒸気処理により、集成材８中のヘミセルロースが熱分解により減少し、スライス性が向上する。   And the hemicellulose in the laminated material 8 reduces by thermal decomposition by high temperature / high pressure steam treatment, and slice property improves.

なお、本実施形態では、単板４は集成材８がスライスされて形成されているが、集成材８でない、高温高圧水蒸気処理が施された単一の木質材がスライスされて形成されるものでもよく、特に限定されない。   In this embodiment, the veneer 4 is formed by slicing the laminated material 8, but is formed by slicing a single woody material that is not the laminated material 8 and that has been subjected to high-temperature and high-pressure steam treatment. However, it is not particularly limited.

そして、積層される単板４間のうちの少なくとも一の単板４間に、クラック防止層５が介在されるもので、本実施形態では、図１に示すように単板４２と単板４３との間にクラック防止層５が介在される。クラック防止層５は、不織布あるいは紙からなるもので、面方向に所定の引張り強度を有するものである。   And the crack prevention layer 5 is interposed between at least one single plate 4 among the laminated single plates 4, and in this embodiment, the single plate 42 and the single plate 43 are shown in FIG. The crack prevention layer 5 is interposed between the two. The crack prevention layer 5 is made of non-woven fabric or paper and has a predetermined tensile strength in the surface direction.

なお、クラック防止層５は不織布や紙の他、織布やその他布状をしたものでもよく、特に限定されない。また、本実施形態では図１に示すように単板４２と単板４３との間にクラック防止層５が介在されているが、この代わりに単板４１と単板４２との間にクラック防止層５が介在されてもよいし、単板４２と単板４３との間に加えて単板４１と単板４２との間にクラック防止層５が介在されてもよい。また、単板４が四枚以上の場合でも、少なくともいずれか一の単板４の間にクラック防止層５が介在されればよい。   The crack prevention layer 5 may be a woven fabric or other cloth in addition to the nonwoven fabric or paper, and is not particularly limited. In this embodiment, as shown in FIG. 1, the crack prevention layer 5 is interposed between the single plate 42 and the single plate 43, but instead, crack prevention is provided between the single plate 41 and the single plate 42. The layer 5 may be interposed, or the crack prevention layer 5 may be interposed between the single plate 41 and the single plate 42 in addition to the single plate 42 and the single plate 43. Further, even when there are four or more single plates 4, the crack prevention layer 5 may be interposed between at least any one single plate 4.

単板４同士（すなわち単板４１と単板４２）と、単板４とクラック防止層５（すなわち単板４２とクラック防止層５、クラック防止層５と単板４３）が接着剤（不図示）により接着される。   The single plates 4 (ie, the single plate 41 and the single plate 42), the single plate 4 and the crack prevention layer 5 (ie, the single plate 42 and the crack prevention layer 5, the crack prevention layer 5 and the single plate 43) are adhesives (not shown). ).

さらに本実施形態では、最上層の単板４の上に、塗装仕上げが施され、塗装層６が形成される。なお、塗装仕上げは任意であり、施されなくても構わない。   Further, in the present embodiment, a paint finish is applied on the uppermost single plate 4 to form a paint layer 6. The paint finish is optional and may not be applied.

このような木質化粧板３にあっては、単板４の厚みが０．６ｍｍ以下に形成されているため、単板４の表面でのクラックの発生が抑えられる。また、一枚の単板４ではなく複数枚の単板４が積層されているため、いずれかの単板４にクラックが発生しても、他の単板４にクラックが伸展するのが抑えられる。また、単板４に反りを発生させる曲げモーメントがかかって、表面付近に大きな引張り応力がかかっても、クラック防止層５により引張り応力に抗して反りの発生が抑えられ、クラックの発生が抑制される。   In such a wood decorative board 3, since the thickness of the veneer 4 is formed to be 0.6 mm or less, generation of cracks on the surface of the veneer 4 is suppressed. In addition, since a plurality of single plates 4 are laminated instead of a single single plate 4, even if a crack occurs in any single plate 4, it is possible to prevent the cracks from extending to other single plates 4. It is done. Further, even when a bending moment that causes warping is applied to the veneer 4 and a large tensile stress is applied near the surface, the crack prevention layer 5 suppresses the warpage against the tensile stress and suppresses the generation of cracks. Is done.

以下、実施例と比較例について行った比較実験の結果について説明する。
＜実施例＞
木質化粧板３の一実施例について説明する。フリッチ７の樹種はビーチ材で、厚み（スライス前の厚み）が４５ｍｍ、長さが約６１０ｍｍ、幅が１１０ｍｍとなるように形成される。フリッチ７となる木質材は、処理温度が１３０℃、処理時間が６０分、処理圧力は０．４〜１．３ＭＰａ、の条件で高温高圧水蒸気処理が施されている。そして、上記寸法・形状となるように成形されたフリッチ７が三個ずつ三列に組み合わされて接着剤により接着され、幅が３３０ｍｍ、長さが１８３０ｍｍの集成材８が構成される。そして、スライス前の集成材８の含水率は４０〜７０重量％である。なお、フリッチ７と集成材８の寸法・形状、集成材８を構成するフリッチ７の列数や一列の個数は上記に限定されない。 Hereinafter, the result of the comparative experiment performed about the Example and the comparative example will be described.
<Example>
An embodiment of the wooden decorative board 3 will be described. The tree species of the flitch 7 is a beach material, and is formed so that the thickness (the thickness before slicing) is 45 mm, the length is about 610 mm, and the width is 110 mm. The wood material that becomes the flitch 7 is subjected to high-temperature and high-pressure steam treatment under the conditions of a treatment temperature of 130 ° C., a treatment time of 60 minutes, and a treatment pressure of 0.4 to 1.3 MPa. Then, the flitches 7 formed so as to have the above dimensions and shape are combined in three rows of three and bonded together with an adhesive to form a laminated material 8 having a width of 330 mm and a length of 1830 mm. And the moisture content of the laminated material 8 before a slice is 40 to 70 weight%. In addition, the size and shape of the flitch 7 and the laminated material 8, the number of rows of the flitch 7 constituting the laminated material 8, and the number of one row are not limited to the above.

この集成材８が厚さ０．４５ｍｍにスライスされ、一枚の単板４が基材１に接着剤により接着される。基材は、ラワン合板で、厚みが１１ｍｍ、幅が３３０ｍｍ、長さが１８３０ｍｍである。そして、接着剤として、変成酢酸ビニルエマルジョンが用いられ、熱圧条件が１１０℃、圧力が０．５ＭＰａで、６０秒間挟持されて接着され、積層される。   This laminated material 8 is sliced to a thickness of 0.45 mm, and a single veneer 4 is bonded to the substrate 1 with an adhesive. The base material is a lauan plywood having a thickness of 11 mm, a width of 330 mm, and a length of 1830 mm. Then, a modified vinyl acetate emulsion is used as an adhesive, and is sandwiched and bonded for 60 seconds at a hot pressure condition of 110 ° C. and a pressure of 0.5 MPa.

更に、この積層された単板４にクラック防止層５が接着剤により接着される。クラック防止層５は、紙からなるもので、目付け量が３０ｇ／ｍ２、幅が３３０ｍｍ、長さが１８３０ｍｍである。そして、接着剤として、変成酢酸ビニルエマルジョンが用いられ、熱圧条件が１１０℃、圧力が０．５ＭＰａで、３０秒間挟持されて接着される。 Further, the crack preventing layer 5 is bonded to the laminated single plate 4 with an adhesive. The crack prevention layer 5 is made of paper and has a basis weight of 30 g / m 2 , a width of 330 mm, and a length of 1830 mm. Then, a modified vinyl acetate emulsion is used as an adhesive, and is sandwiched and bonded for 30 seconds at a hot pressure condition of 110 ° C. and a pressure of 0.5 MPa.

更に、この積層されたクラック防止層５に単板４が接着剤により接着される。接着剤として、変成酢酸ビニルエマルジョンが用いられ、熱圧条件が１１０℃、圧力が０．５ＭＰａで、６０秒間挟持されて接着され、積層される。   Further, the single plate 4 is bonded to the laminated crack preventing layer 5 with an adhesive. As the adhesive, a modified vinyl acetate emulsion is used. The hot-pressing condition is 110 ° C. and the pressure is 0.5 MPa.

そして、最上層の単板４の表面に＃２４０のサンダー仕上げが行われ、下塗り（ナトコ株式会社製：ＩＳＴ ＵＶ用塗料）が２０ｇ／ｍ２で塗装され、紫外線照射により硬化された。次に、その単板４に中塗り（ナトコ株式会社製：ＩＳＴ ＵＶ用塗料）が２０ｇ／ｍ２で塗装され、紫外線照射により硬化され、その表面に＃２４０のサンダー仕上げが行われた。次に、その単板４に上塗り（ナトコ株式会社製：ＩＳＴ ＵＶ用塗料）が５５ｇ／ｍ２で塗装され、紫外線照射により硬化された。
＜比較例１＞
実施例と比較して、クラック防止層５が設けられていない点で異なり、他の点においては実施例と同じである。
＜比較例２＞
実施例と比較して、フリッチ７となる木質材に高温高圧水蒸気処理が施されていない点で異なり、他の点においては実施例と同じである。
＜比較例３＞
実施例と比較して、単板４の厚みが１ｍｍである点（実施例では０．４５ｍｍ）で異なり、他の点においては実施例と同じである。 Then, the surface of the uppermost veneer 4 was sanded with # 240, and an undercoat (manufactured by NATCO Corporation: IST UV paint) was applied at 20 g / m 2 and cured by ultraviolet irradiation. Next, an intermediate coat (manufactured by NATCO Co., Ltd .: IST UV paint) was applied to the veneer 4 at 20 g / m 2 , cured by ultraviolet irradiation, and a # 240 sander finish was applied to the surface. Next, a top coat (manufactured by NATCO Corporation: IST UV paint) was applied to the veneer 4 at 55 g / m 2 and cured by ultraviolet irradiation.
<Comparative Example 1>
Compared with the example, it is different in that the crack prevention layer 5 is not provided, and is the same as the example in other points.
<Comparative example 2>
Compared to the example, the wood material that becomes the flitch 7 is different in that the high-temperature and high-pressure steam treatment is not performed, and the other points are the same as the example.
<Comparative Example 3>
Compared to the example, the thickness of the single plate 4 is 1 mm (0.45 mm in the example), and the other points are the same as the example.

実施例、比較例１〜３について行われた評価試験は、寒熱繰り返し試験で、−２０℃が２時間継続され、その後、６０℃が２時間継続され、これが２０回繰り返されることで行われる。そして、表面の２００ｍｍ×２００ｍｍ当たりで発生したクラックの総延長長さ（ｍｍ）により、評価が行われた。結果を表１に示す。   The evaluation test performed about the Example and Comparative Examples 1-3 is a cold heat repetition test, -20 degreeC is continued for 2 hours, and then 60 degreeC is continued for 2 hours, and this is repeated 20 times. And evaluation was performed by the total extension length (mm) of the crack which generate | occur | produced per 200 mm x 200 mm of the surface. The results are shown in Table 1.

Figure 0005954660
Figure 0005954660

実施例では、集成材８が厚さ０．４５ｍｍにスライスされて単板４が形成される際にクラックが発生しなかった。また、クラックの総延長長さが１５ｍｍで、極めて良好な結果が得られた。   In the example, no cracks occurred when the laminated material 8 was sliced to a thickness of 0.45 mm to form the single plate 4. Moreover, the total extension length of the crack was 15 mm, and a very good result was obtained.

比較例１では、集成材８が厚さ０．４５ｍｍにスライスされて単板４が形成される際にクラックが発生しなかったものの、クラックの総延長長さが８０８ｍｍで、使用に不適となる結果が得られた。   In Comparative Example 1, although the laminated material 8 was sliced to a thickness of 0.45 mm and the single plate 4 was formed, no crack was generated, but the total extension length of the crack was 808 mm, which is unsuitable for use. Results were obtained.

比較例２では、集成材８に高温高圧水蒸気処理が施されていないため、集成材８が厚さ０．４５ｍｍにスライスされて単板４が形成される際にクラックが発生した。なお、クラックの総延長長さが８４ｍｍで、スライス時にクラックが発生していない部分は使用可であるが、全体としては使用に不適となる結果が得られた。   In Comparative Example 2, since the laminated material 8 was not subjected to the high-temperature and high-pressure steam treatment, cracks occurred when the laminated material 8 was sliced to a thickness of 0.45 mm to form the single plate 4. In addition, although the total extension length of a crack was 84 mm and the part in which the crack did not generate | occur | produce at the time of a slice is useable, the result which becomes unsuitable for use as a whole was obtained.

比較例３では、集成材８が厚さ０．４５ｍｍにスライスされて単板４が形成される際にクラックが発生しなかったものの、クラックの総延長長さが６７０ｍｍで、使用に不適となる結果が得られた。   In Comparative Example 3, cracks did not occur when the laminated material 8 was sliced to a thickness of 0.45 mm to form the veneer 4, but the total extension length of the cracks was 670 mm, which is unsuitable for use. Results were obtained.

１ 建材
２ 基材
３ 木質化粧板
４ 単板
５ クラック防止層
６ 塗装層
７ フリッチ
８ 集成材 DESCRIPTION OF SYMBOLS 1 Construction material 2 Base material 3 Wood decorative board 4 Single board 5 Crack prevention layer 6 Paint layer 7 Flitch 8 Glued material

Claims (2)

木質材からなる単板が複数積層されてなる木質化粧板であって、
それぞれの前記単板は、厚みが０．６ｍｍ以下となるように形成され、
前記単板間のうちの少なくとも一の前記単板間に、不織布あるいは紙からなるクラック防止層が介在され、
積層される、前記単板同士、および、前記単板と前記クラック防止層とが接着剤により接着されることを特徴とする木質化粧板。 A wooden decorative board in which a plurality of veneers made of wooden material are laminated,
Each of the single plates is formed to have a thickness of 0.6 mm or less,
Between at least one of the single plates, a crack prevention layer made of a nonwoven fabric or paper is interposed,
The wood veneer, wherein the veneers and the veneer and the anti-cracking layer, which are laminated, are bonded together with an adhesive. 木質材がスライスされて形成される単板が複数積層されてなる木質化粧板の製造方法であって、
それぞれの前記単板は、高温高圧水蒸気処理が施された前記木質材がスライスされて厚みが０．６ｍｍ以下となるように形成され、
複数の前記単板が積層され、前記単板間のうちの少なくとも一の前記単板間に、不織布あるいは紙からなるクラック防止層が介在され、
積層される、前記単板同士、および、前記単板と前記クラック防止層とが接着剤により接着されることを特徴とする木質化粧板の製造方法。 A method for producing a wooden decorative board in which a plurality of single plates formed by slicing a wooden material are laminated,
Each of the single plates is formed such that the wood material that has been subjected to the high-temperature and high-pressure steam treatment is sliced to have a thickness of 0.6 mm or less,
A plurality of the single plates are laminated, and a crack prevention layer made of a nonwoven fabric or paper is interposed between at least one of the single plates.
A method for producing a wooden decorative board, wherein the veneers are laminated and the veneer and the crack prevention layer are bonded together with an adhesive.
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