JP6895651B2 - Plate-shaped building material - Google Patents

Plate-shaped building material Download PDF

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JP6895651B2
JP6895651B2 JP2015183550A JP2015183550A JP6895651B2 JP 6895651 B2 JP6895651 B2 JP 6895651B2 JP 2015183550 A JP2015183550 A JP 2015183550A JP 2015183550 A JP2015183550 A JP 2015183550A JP 6895651 B2 JP6895651 B2 JP 6895651B2
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wood
resin
plate
shaped building
base material
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JP2017057631A (en
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鉄平 朝田
鉄平 朝田
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Panasonic Intellectual Property Management Co Ltd
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Description

本発明は、床材や天井材、壁材等として用いられる板状建材に関する。 The present invention relates to a plate-shaped building material used as a floor material, a ceiling material, a wall material, or the like.

従来より、床材や天井材、壁材等の内装材や、家具材等として用いられる板状建材としては、合板や繊維板等の木質系基材に、表面化粧シートを積層したものが知られている。このようなものでは、表面化粧シートの構成によっては、木質系基材の表面の濃淡等が表面化粧シートを通して透ける場合があった。
例えば、下記特許文献１には、樹脂含浸紙層の表面に位置する樹脂含浸チタン紙の表面に、木質単板を積層した建材が開示されている。 Conventionally, as interior materials such as flooring materials, ceiling materials, wall materials, and plate-shaped building materials used as furniture materials, it has been known that a surface decorative sheet is laminated on a wood-based base material such as plywood or fiberboard. Has been done. In such a case, depending on the configuration of the surface decorative sheet, the shade of the surface of the wood-based base material may be transparent through the surface decorative sheet.
For example, Patent Document 1 below discloses a building material in which a wood veneer is laminated on the surface of resin-impregnated titanium paper located on the surface of a resin-impregnated paper layer.

特開平１０−３２３９４１号公報Japanese Unexamined Patent Publication No. 10-323941

しかしながら、上記特許文献１に記載されたような建材では、樹脂含浸チタン紙の構成によっては、表層部が剥離し易くなることも考えられ、更なる改善が望まれる。 However, in the building material as described in Patent Document 1, it is considered that the surface layer portion is easily peeled off depending on the structure of the resin-impregnated titanium paper, and further improvement is desired.

本発明は、上記実情に鑑みてなされたものであり、木質系基材の隠蔽性を向上させながらも、表層部の剥離強度を向上し得る板状建材を提供することを目的としている。 The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a plate-shaped building material capable of improving the peel strength of a surface layer portion while improving the concealing property of a wood-based base material.

上記目的を達成するために、本発明に係る板状建材は、木質系基材の表面側に、酸化チタンの含有率が４％以上、１０％以下で、厚さが０．２ｍｍ以上、１．０ｍｍ以下の樹脂含浸紙が積層されており、前記樹脂含浸紙に含浸されている樹脂が熱硬化性樹脂であることを特徴とする。 In order to achieve the above object, the plate-shaped building material according to the present invention has a titanium oxide content of 4% or more and 10% or less and a thickness of 0.2 mm or more on the surface side of the wood-based base material. A resin-impregnated paper of .0 mm or less is laminated, and the resin impregnated in the resin-impregnated paper is a thermosetting resin .

本発明に係る板状建材は、上述のような構成としたことで、木質系基材の隠蔽性を向上させながらも、表層部の剥離強度を向上させることができる。 The plate-shaped building material according to the present invention has the above-mentioned structure, so that it is possible to improve the peel strength of the surface layer portion while improving the concealing property of the wood-based base material.

（ａ）、（ｂ）は、本発明の一実施形態に係る板状建材の一例を模式的に示し、（ａ）は、（ｂ）におけるＸ−Ｘ線矢視に対応させた一部破断概略縦断面図、（ｂ）は、同板状建材を模式的に示す概略斜視図である。(A) and (b) schematically show an example of a plate-shaped building material according to an embodiment of the present invention, and (a) is a partial fracture corresponding to the X-ray arrow in (b). The schematic vertical sectional view (b) is a schematic perspective view schematically showing the plate-shaped building material. 本発明に係る板状建材の実施例と比較例とを評価試験の結果とともに示す表である。It is a table which shows the example and the comparative example of the plate-shaped building material which concerns on this invention together with the result of the evaluation test.

以下に本発明の実施の形態について、図面に基づいて説明する。
図１は、本実施形態に係る板状建材の一例を模式的に示す図である。
本実施形態に係る板状建材１は、図１（ｂ）に示すように、厚さ方向に見て一方向に長尺状の略矩形平板状とされている。
本実施形態では、この板状建材１を、床材として用いられるものとしている。この板状建材１の長さ寸法や幅寸法、厚さ寸法等は、一般的な床材の各寸法と概ね同寸法としてもよい。例えば、板状建材１を、長さ寸法が１５００ｍｍ〜２０００ｍｍ程度、幅寸法が２５０ｍｍ〜５００ｍｍ程度、厚さ寸法が３ｍｍ〜３０ｍｍ程度とされた長尺板状体としてもよい。 Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a diagram schematically showing an example of a plate-shaped building material according to the present embodiment.
As shown in FIG. 1B, the plate-shaped building material 1 according to the present embodiment has a substantially rectangular flat plate shape that is elongated in one direction when viewed in the thickness direction.
In the present embodiment, this plate-shaped building material 1 is used as a flooring material. The length dimension, width dimension, thickness dimension, and the like of the plate-shaped building material 1 may be substantially the same as each dimension of the general flooring material. For example, the plate-shaped building material 1 may be a long plate-like body having a length dimension of about 1500 mm to 2000 mm, a width dimension of about 250 mm to 500 mm, and a thickness dimension of about 3 mm to 30 mm.

この板状建材１は、木質系基材１０の表面側に、酸化チタンの含有率が４％以上、１０％以下で、厚さが０．２ｍｍ以上の樹脂含浸紙１２を積層した構成とされている。
また、本実施形態では、板状建材１を、木質系基材１０の表面及び裏面に、防湿シート１１，１１を積層し、樹脂含浸紙１２を、表面側の防湿シート１１の表面に積層した構成としている。また、樹脂含浸紙１２の表面に、表面化粧材１３を積層した構成としている。 The plate-shaped building material 1 has a structure in which a resin-impregnated paper 12 having a titanium oxide content of 4% or more and 10% or less and a thickness of 0.2 mm or more is laminated on the surface side of the wood-based base material 10. ing.
Further, in the present embodiment, the plate-shaped building material 1 is laminated with the moisture-proof sheets 11 and 11 on the front surface and the back surface of the wood-based base material 10, and the resin-impregnated paper 12 is laminated on the surface of the moisture-proof sheet 11 on the front surface side. It has a structure. Further, the surface decorative material 13 is laminated on the surface of the resin-impregnated paper 12.

木質系基材１０は、非天然木材（エンジニアドボード（エンジニアドウッド））から構成されている。このような木質系基材１０としては、合板やＬＶＬ（単板積層材）等の木質積層板や、パーティクルボード（ＰＢ）等の木質ボード、ＭＤＦ（中密度繊維板）やハードボード等の木質繊維板等としてもよい。また、木質系基材１０を、木粉や合成樹脂系材料、無機フィラー、相溶化剤、着色剤などを所定の含有割合で含有させた木粉・プラスチック複合材（ＷＰＣ）から形成されたものとしてもよい。また、木質系基材１０を、これら種々の材料からなる板材を積層した複層構造とされたものとしてもよい。 The wood-based base material 10 is made of non-natural wood (engineered board (engineered wood)). Examples of such a wood-based base material 10 include wood laminated boards such as plywood and LVL (single board laminated material), wood boards such as particle board (PB), and wood such as MDF (medium density fiberboard) and hard boards. It may be a fiber board or the like. Further, the wood-based base material 10 is formed of a wood powder / plastic composite material (WPC) containing wood powder, a synthetic resin material, an inorganic filler, a compatibilizer, a colorant, etc. in a predetermined content ratio. May be. Further, the wood-based base material 10 may have a multi-layer structure in which plate materials made of these various materials are laminated.

また、この木質系基材１０の比重（水に対する比重）は、耐水性の観点から適宜の比重としてもよい。例えば、木質系基材１０の比重を、０．６以上としてもよく、好ましくは、０．７３以上としてもよい。このような構成とすれば、木質系基材１０の耐水性を向上させることができ、木質系基材１０の反りや膨れ等を抑制することができる。また、この木質系基材１０の比重を、より好ましくは、０．７５以上としてもよい。また、この木質系基材１０の比重の上限値は、取扱性の観点や軽量化を図る観点等から１．５以下としてもよく、好ましくは、１．２以下としてもよく、より好ましくは、１．０以下としてもよい。
また、この木質系基材１０の厚さ寸法は、板状建材１の用途等に応じて適宜の寸法としてもよく、２．５ｍｍ〜３０ｍｍ程度としてもよい。 Further, the specific gravity (specific gravity with respect to water) of the wood-based base material 10 may be an appropriate specific gravity from the viewpoint of water resistance. For example, the specific gravity of the wood-based base material 10 may be 0.6 or more, preferably 0.73 or more. With such a configuration, the water resistance of the wood-based base material 10 can be improved, and warping, swelling, etc. of the wood-based base material 10 can be suppressed. Further, the specific gravity of the wood-based base material 10 may be more preferably 0.75 or more. Further, the upper limit of the specific gravity of the wood-based base material 10 may be 1.5 or less, preferably 1.2 or less, more preferably 1.2 or less, from the viewpoint of handleability and weight reduction. It may be 1.0 or less.
Further, the thickness dimension of the wood-based base material 10 may be an appropriate dimension depending on the use of the plate-shaped building material 1, or may be about 2.5 mm to 30 mm.

防湿シート１１は、図１（ａ）に示すように、薄シート状（フィルム状）とされている。
この防湿シート１１としては、ポリエチレン、ポリプロピレン、ポリ塩化ビニル、ポリエチレンテレフタレート等の合成樹脂系シート（フィルム）を採用するようにしてもよく、また、アルミ箔等の金属薄膜シートを採用するようにしてもよい。また、防湿シート１１としては、このようなシートの表裏に、紙材が積層されたものとしてもよい。
この防湿シート１１の透湿度（水蒸気透過度）は、木質系基材１０の吸湿を抑制する観点等から適宜の透湿度としてもよい。例えば、防湿シート１１の透湿度を、１５ｇ／ｍ２・２４ｈ以下としてもよく、好ましくは、１０ｇ／ｍ２・２４ｈ以下としてもよい。このような構成とすれば、木質系基材１０の表裏に積層された防湿シート１１，１１によって木質系基材１０の吸湿を抑制することができ、木質系基材１０の反りを抑制することができる。また、この防湿シート１１の透湿度を、より好ましくは、７ｇ／ｍ２・２４ｈ以下としてもよい。 As shown in FIG. 1A, the moisture-proof sheet 11 has a thin sheet shape (film shape).
As the moisture-proof sheet 11, a synthetic resin sheet (film) such as polyethylene, polypropylene, polyvinyl chloride, or polyethylene terephthalate may be used, or a metal thin film sheet such as aluminum foil may be used. May be good. Further, as the moisture-proof sheet 11, a paper material may be laminated on the front and back surfaces of such a sheet.
The moisture permeability (water vapor transmission rate) of the moisture-proof sheet 11 may be appropriately set from the viewpoint of suppressing moisture absorption of the wood-based base material 10. For example, the moisture permeability of the moisture-proof sheet 11 may be less 15g / m 2 · 24h, preferably, may be less 10g / m 2 · 24h. With such a configuration, the moisture absorption of the wood-based base material 10 can be suppressed by the moisture-proof sheets 11 and 11 laminated on the front and back of the wood-based base material 10, and the warp of the wood-based base material 10 can be suppressed. Can be done. Further, the moisture permeability of the moisture-proof sheet 11, more preferably, may be less 7g / m 2 · 24h.

また、防湿シート１１の厚さ寸法は、例えば、０．０２ｍｍ〜１．０ｍｍ程度としてもよい。
また、木質系基材１０の表裏のそれぞれに積層される防湿シート１１，１１は、反りを効果的に抑制する観点等から、互いに同様の構成とされたものとしてもよい。
また、これら表裏の防湿シート１１，１１は、変性酢酸ビニル系接着剤や水性ビニル系接着剤、反応性ホットメルト接着剤等の適宜の接着剤を用いて木質系基材１０の表裏に貼着するようにしてもよい。 Further, the thickness dimension of the moisture-proof sheet 11 may be, for example, about 0.02 mm to 1.0 mm.
Further, the moisture-proof sheets 11 and 11 laminated on the front and back surfaces of the wood-based base material 10 may have the same configuration as each other from the viewpoint of effectively suppressing warpage.
The front and back moisture-proof sheets 11 and 11 are attached to the front and back of the wood-based base material 10 using an appropriate adhesive such as a modified vinyl acetate-based adhesive, an aqueous vinyl-based adhesive, or a reactive hot-melt adhesive. You may try to do it.

樹脂含浸紙１２は、図１（ａ）に示すように、薄板状（薄シート状）とされている。
この樹脂含浸紙１２は、パルプ等の紙原料に酸化チタンを添加した原紙（紙基材）に、メラミン樹脂やエポキシ樹脂、ジアリルフタレート（ＤＡＰ）樹脂、フェノール樹脂等の熱硬化性樹脂を含浸させた構成とされている。
この酸化チタンの樹脂含浸紙１２全体に対する含有率を小さくし過ぎれば、隠蔽性が低下する傾向があり、大きくし過ぎれば、紙間強度（層間強度）が低下する傾向がある。このような観点から、樹脂含浸紙１２全体に対する酸化チタンの含有率を、４％以上、１０％以下としている。 As shown in FIG. 1A, the resin-impregnated paper 12 has a thin plate shape (thin sheet shape).
In this resin-impregnated paper 12, a base paper (paper base material) obtained by adding titanium oxide to a paper raw material such as pulp is impregnated with a thermosetting resin such as a melamine resin, an epoxy resin, a diallyl phthalate (DAP) resin, or a phenol resin. It is said that it has a structure.
If the content of titanium oxide with respect to the entire resin-impregnated paper 12 is too small, the hiding property tends to decrease, and if it is too large, the inter-paper strength (interlayer strength) tends to decrease. From this point of view, the content of titanium oxide in the entire resin-impregnated paper 12 is set to 4% or more and 10% or less.

また、この樹脂含浸紙１２の厚さ寸法を小さくし過ぎれば、隠蔽性が低下する傾向があり、大きくし過ぎれば、高剛性となり板状建材１の反り要因となる傾向がある。このような観点から、樹脂含浸紙１２の厚さ寸法を、０．２ｍｍ〜１．０ｍｍ程度としてもよく、好ましくは、０．３ｍｍ〜０．５ｍｍ程度としてもよい。本実施形態では、この樹脂含浸紙１２の厚さ寸法を、防湿シート１１の厚さ寸法よりも大とし、かつ木質系基材１０の厚さ寸法よりも小としている。
また、この樹脂含浸紙１２は、上記同様、変性酢酸ビニル系接着剤や水性ビニル系接着剤、反応性ホットメルト接着剤等の適宜の接着剤等を用いて木質系基材１０の表面側（本実施形態では、表側の防湿シート１１の表面）に貼着するようにしてもよい。 Further, if the thickness dimension of the resin-impregnated paper 12 is made too small, the hiding property tends to be lowered, and if it is made too large, the rigidity becomes high and the plate-shaped building material 1 tends to warp. From such a viewpoint, the thickness dimension of the resin-impregnated paper 12 may be about 0.2 mm to 1.0 mm, preferably about 0.3 mm to 0.5 mm. In the present embodiment, the thickness dimension of the resin-impregnated paper 12 is made larger than the thickness dimension of the moisture-proof sheet 11 and smaller than the thickness dimension of the wood-based base material 10.
Further, in the same manner as described above, the resin-impregnated paper 12 is formed on the surface side of the wood-based base material 10 by using an appropriate adhesive such as a modified vinyl acetate-based adhesive, an aqueous vinyl-based adhesive, or a reactive hot melt adhesive. In the present embodiment, it may be attached to the surface of the moisture-proof sheet 11 on the front side).

表面化粧材１３は、図１（ａ）に示すように、薄シート状（フィルム状）とされている。
この表面化粧材１３は、天然木材（銘木）を適宜、加工して形成された突板等の単板や、木目柄や大理石状の石目柄等の種々の柄（模様）が印刷された化粧印刷紙、オレフィン系等の合成樹脂系フィルム等としてもよい。また、表面化粧材１３の色柄は、比較的に薄い、例えば、白色を基調とする淡色系のものとしてもよい。
また、この表面化粧材１３の厚さ寸法は、例えば、０．０１ｍｍ〜０．３ｍｍ程度としてもよく、０．１ｍｍ以下としてもよい。本実施形態では、この表面化粧材１３の厚さ寸法を、防湿シート１１及び樹脂含浸紙１２よりも小としている。また、この表面化粧材１３を、厚さ寸法が０．１ｍｍ以下の化粧印刷紙としている。このような構成とすれば、オレフィン系等の合成樹脂系フィルムに比べて環境負荷を小さくすることができる。
この表面化粧材１３は、上記同様、変性酢酸ビニル系接着剤や水性ビニル系接着剤、反応性ホットメルト接着剤等の適宜の接着剤等を用いて樹脂含浸紙１２の表面に貼着するようにしてもよい。
なお、このような表面化粧材１３を設けた態様に代えて、適宜の色柄等の模様が付された樹脂含浸紙１２を木質系基材１０の表面側（本実施形態では、表側の防湿シート１１の表面）に積層した構成としてもよい。 As shown in FIG. 1A, the surface decorative material 13 has a thin sheet shape (film shape).
The surface decorative material 13 is a decorative material on which a single plate such as a veneer formed by appropriately processing natural wood (named wood) or various patterns (patterns) such as a wood grain pattern or a marble-like stone pattern are printed. It may be a printing paper, a synthetic resin film such as an olefin film, or the like. Further, the color pattern of the surface decorative material 13 may be relatively light, for example, a light color based on white.
Further, the thickness dimension of the surface decorative material 13 may be, for example, about 0.01 mm to 0.3 mm, or 0.1 mm or less. In the present embodiment, the thickness dimension of the surface decorative material 13 is smaller than that of the moisture-proof sheet 11 and the resin-impregnated paper 12. Further, the surface decorative material 13 is a decorative printing paper having a thickness dimension of 0.1 mm or less. With such a configuration, the environmental load can be reduced as compared with a synthetic resin film such as an olefin film.
Similar to the above, the surface decorative material 13 is attached to the surface of the resin impregnated paper 12 using an appropriate adhesive such as a modified vinyl acetate adhesive, an aqueous vinyl adhesive, or a reactive hot melt adhesive. It may be.
Instead of the mode in which the surface decorative material 13 is provided, the resin-impregnated paper 12 having a pattern such as an appropriate color pattern is placed on the surface side of the wood-based base material 10 (in this embodiment, the front side is moisture-proof). It may be laminated on the surface of the sheet 11).

また、本実施形態では、板状建材１の表面に、溝部１４を設けている。また、この溝部１４を、溝幅方向両内側面が溝開口側に向かうに従い拡開テーパー状の傾斜面状となるように設けた構成としている。つまり、溝部１４を、溝長手方向に見て略Ｖ字溝形状としている。また、図例では、溝開口側部位の両内側面を、凸湾曲面形状とし、溝底側部位の両内側面を、平坦面状とした例を示している。なお、溝部１４の溝長手方向に見た形状は、このような形状に限られず、略Ｕ字溝形状、半円溝形状、逆台形溝状等、その他、種々の形状としてもよい。
また、この溝部１４の溝深さ寸法（建材厚さ方向に沿う寸法）や溝幅寸法（溝開口側部位の幅寸法）は、当該板状建材１の用途に応じて、また、見栄え上の観点や加工性の観点等から適宜の寸法としてもよい。例えば、この溝部１４の溝深さ寸法を、０．５ｍｍ〜１．０ｍｍ程度とし、溝幅寸法を、０．５ｍｍ〜１．５ｍｍ程度としてもよい。図例では、この溝部１４を、木質系基材１０に達するように設けた例を示している。 Further, in the present embodiment, the groove portion 14 is provided on the surface of the plate-shaped building material 1. Further, the groove portion 14 is provided so that both inner side surfaces in the groove width direction become an inclined surface shape having a widening taper shape toward the groove opening side. That is, the groove portion 14 has a substantially V-shaped groove shape when viewed in the groove longitudinal direction. Further, in the illustrated example, both inner side surfaces of the groove opening side portion have a convex curved surface shape, and both inner side surfaces of the groove bottom side portion have a flat surface shape. The shape of the groove portion 14 seen in the groove longitudinal direction is not limited to such a shape, and may be a substantially U-shaped groove shape, a semicircular groove shape, an inverted trapezoidal groove shape, or any other shape.
Further, the groove depth dimension (dimension along the thickness direction of the building material) and the groove width dimension (width dimension of the groove opening side portion) of the groove portion 14 can be determined according to the application of the plate-shaped building material 1 and in terms of appearance. Appropriate dimensions may be used from the viewpoint of viewpoint and workability. For example, the groove depth dimension of the groove portion 14 may be about 0.5 mm to 1.0 mm, and the groove width dimension may be about 0.5 mm to 1.5 mm. In the illustrated example, an example in which the groove portion 14 is provided so as to reach the wood-based base material 10 is shown.

また、図例では、板状建材１の長手方向に延びる複数本の縦溝状の溝部１４と板状建材１の幅方向に延びる複数本の横溝状の溝部１４とを設けた例を示している。
なお、溝部１４を、溝幅方向両内側面において露出する木質系基材１０の面積が溝内面の全面積に対して１／２未満となるように設けた構成としてもよい。また、溝部１４の溝深さ寸法を、木質系基材１０の表面側に積層された部材（本実施形態では、防湿シート１１、樹脂含浸紙１２及び表面化粧材１３）の厚さ寸法を足し合わせた寸法の２倍未満としてもよい。また、この板状建材１の四周端部に実部等を設けた構成としてもよく、表面側の四周縁部に、溝部１４に応じた形状の面取り部を設けた構成としてもよい。
また、板状建材１の表面に、適宜の仕上塗装が施されたものとしてもよい。例えば、この板状建材１の表面に、透明または半透明のトップコート層（保護層）を形成するように、紫外線硬化型のクリアー塗料等が塗装されたものとしてもよい。また、この紫外線硬化型のクリアー塗料を、溝部１４の内面を含んで板状建材１の表面に塗装されたものとしてもよい。
また、板状建材１の裏面側に、緩衝材（クッション材）や吸音材等を更に積層した構成としてもよい。 Further, in the illustrated example, an example is shown in which a plurality of vertical groove-shaped groove portions 14 extending in the longitudinal direction of the plate-shaped building material 1 and a plurality of lateral groove-shaped groove portions 14 extending in the width direction of the plate-shaped building material 1 are provided. There is.
The groove portion 14 may be provided so that the area of the wood-based base material 10 exposed on both inner side surfaces in the groove width direction is less than 1/2 of the total area of the groove inner surface. Further, the groove depth dimension of the groove portion 14 is added to the thickness dimension of the member (in this embodiment, the moisture-proof sheet 11, the resin-impregnated paper 12, and the surface decorative material 13) laminated on the surface side of the wood-based base material 10. It may be less than twice the combined dimensions. Further, the plate-shaped building material 1 may be provided with a real portion or the like at the four peripheral ends thereof, or a chamfered portion having a shape corresponding to the groove portion 14 may be provided at the four peripheral edges on the surface side.
Further, the surface of the plate-shaped building material 1 may be appropriately finished coated. For example, the surface of the plate-shaped building material 1 may be coated with an ultraviolet curable clear paint or the like so as to form a transparent or translucent top coat layer (protective layer). Further, the ultraviolet curable clear paint may be applied to the surface of the plate-shaped building material 1 including the inner surface of the groove portion 14.
Further, a cushioning material (cushion material), a sound absorbing material, or the like may be further laminated on the back surface side of the plate-shaped building material 1.

本実施形態に係る板状建材１は、上述のような構成としたことで、木質系基材１０の隠蔽性を向上させながらも、表層部の剥離強度を向上させることができる。つまり、木質系基材１０の表面側に、酸化チタンの含有率が４％以上、１０％以下で、厚さが０．２ｍｍ以上の樹脂含浸紙１２を積層した構成としている。従って、木質系基材１０の隠蔽性を向上させながらも、表層部の剥離強度を向上させることができる。つまり、上述のように、厚さを０．２ｍｍ未満としたり、酸化チタンの含有率を４％未満とすれば、隠蔽性が低下する傾向があり、酸化チタンの含有率を１０％超とすれば、樹脂含浸紙の紙間強度（層間強度）が低下し、剥離強度が低下する傾向がある。上記構成によれば、木質系基材１０の隠蔽性を確保しながらも、表層部の剥離強度を向上させることができる。 Since the plate-shaped building material 1 according to the present embodiment has the above-described configuration, it is possible to improve the peel strength of the surface layer portion while improving the concealing property of the wood-based base material 10. That is, the resin-impregnated paper 12 having a titanium oxide content of 4% or more and 10% or less and a thickness of 0.2 mm or more is laminated on the surface side of the wood-based base material 10. Therefore, it is possible to improve the peel strength of the surface layer portion while improving the hiding property of the wood-based base material 10. That is, as described above, if the thickness is less than 0.2 mm or the titanium oxide content is less than 4%, the hiding property tends to decrease, and the titanium oxide content is more than 10%. For example, the inter-paper strength (interlayer strength) of the resin-impregnated paper tends to decrease, and the peeling strength tends to decrease. According to the above configuration, it is possible to improve the peel strength of the surface layer portion while ensuring the concealing property of the wood-based base material 10.

次に、本発明に係る板状建材の実施例の一例と比較例とを、図２を参照して説明する。
各実施例及び各比較例では、いずれも、長さ寸法が１８４０ｍｍ、幅寸法が３１３ｍｍの木質系基材の表裏両面に、厚さ寸法が０．１ｍｍの防湿シートを変性酢酸ビニル系接着剤で積層した構成とした。また、表面側の防湿シートの表面に、酸化チタンを含有するメラミン樹脂含浸紙を変性酢酸ビニル系接着剤で積層し、このメラミン樹脂含浸紙の表面に、厚さ寸法が０．０５ｍｍで白色を基調とする石目柄の化粧印刷紙を変性酢酸ビニル系接着剤で積層した構成とした。また、表面に溝部を設け、この溝部内面を含む表面に紫外線硬化型のクリアー塗料を塗装した構成とした。
以下、各実施例及び各比較例における異なる構成について説明する。 Next, an example and a comparative example of the plate-shaped building material according to the present invention will be described with reference to FIG.
In each of the Examples and Comparative Examples, a moisture-proof sheet having a thickness of 0.1 mm was applied to both the front and back surfaces of a wood-based substrate having a length of 1840 mm and a width of 313 mm with a modified vinyl acetate adhesive. It has a laminated structure. Further, a melamine resin-impregnated paper containing titanium oxide is laminated on the surface of the moisture-proof sheet on the front surface side with a modified vinyl acetate-based adhesive, and the surface of the melamine resin-impregnated paper is white with a thickness of 0.05 mm. A decorative printing paper with a stone-grained pattern, which is the basic tone, was laminated with a modified vinyl acetate-based adhesive. Further, a groove portion is provided on the surface, and the surface including the inner surface of the groove portion is coated with an ultraviolet curable clear paint.
Hereinafter, different configurations in each Example and each Comparative Example will be described.

実施例１では、比重が０．７５で厚さが１１．４ｍｍのパーティクルボードを木質系基材とし、透湿度が７ｇ／ｍ２・２４ｈの防湿シートとし、厚さが０．３ｍｍで酸化チタンの含有率が４％の樹脂含浸紙とした。
実施例２では、比重が０．７５で厚さが１１．４ｍｍのパーティクルボードを木質系基材とし、透湿度が７ｇ／ｍ２・２４ｈの防湿シートとし、厚さが０．３ｍｍで酸化チタンの含有率が１０％の樹脂含浸紙とした。
実施例３では、比重が０．７５で厚さが１１．２ｍｍのパーティクルボードを木質系基材とし、透湿度が１０ｇ／ｍ２・２４ｈの防湿シートとし、厚さが０．５ｍｍで酸化チタンの含有率が４％の樹脂含浸紙とした。 In Example 1, the specific gravity is thick particle board of 11.4mm and wood-based substrate in 0.75, moisture permeability and moisture-proof sheet of 7g / m 2 · 24h, titanium oxide thickness of 0.3mm A resin-impregnated paper having a content of 4% was prepared.
In Example 2, the specific gravity is thick particle board of 11.4mm and wood-based substrate in 0.75, moisture permeability and moisture-proof sheet 7 g / m 2 · 24h, titanium oxide thickness of 0.3mm A resin-impregnated paper having a content of 10% was prepared.
In Example 3, the specific gravity is thick particle board of 11.2mm and wood-based substrate in 0.75, moisture permeability and moisture-proof sheet of 10g / m 2 · 24h, titanium oxide thickness of 0.5mm A resin-impregnated paper having a content of 4% was prepared.

実施例４では、比重が０．７８で厚さが１１．５ｍｍのＭＤＦを木質系基材とし、透湿度が３ｇ／ｍ２・２４ｈの防湿シートとし、厚さが０．２ｍｍで酸化チタンの含有率が４％の樹脂含浸紙とした。
実施例５では、比重が０．７５で厚さが１１．２ｍｍのパーティクルボードを木質系基材とし、透湿度が１５ｇ／ｍ２・２４ｈの防湿シートとし、厚さが０．５ｍｍで酸化チタンの含有率が４％の樹脂含浸紙とした。
実施例６では、比重が０．７０で厚さが１１．２ｍｍのパーティクルボードを木質系基材とし、透湿度が１０ｇ／ｍ２・２４ｈの防湿シートとし、厚さが０．５ｍｍで酸化チタンの含有率が４％の樹脂含浸紙とした。 In Example 4, a specific gravity of thickness 0.78 is the MDF of 11.5mm and woody substrates, moisture permeability and moisture-proof sheet of 3g / m 2 · 24h, thickness of the titanium oxide 0.2mm A resin-impregnated paper having a content of 4% was used.
In Example 5, specific gravity and thickness of the particle board of 11.2mm and wood-based substrate in 0.75, moisture permeability and moisture-proof sheet of 15g / m 2 · 24h, titanium oxide thickness of 0.5mm A resin-impregnated paper having a content of 4% was prepared.
In Example 6, the specific gravity is thick particle board of 11.2mm and wood-based substrate in 0.70, moisture permeability and moisture-proof sheet of 10g / m 2 · 24h, titanium oxide thickness of 0.5mm A resin-impregnated paper having a content of 4% was prepared.

比較例１では、比重が０．７５で厚さが１１．６ｍｍのパーティクルボードを木質系基材とし、透湿度が７ｇ／ｍ２・２４ｈの防湿シートとし、厚さが０．１ｍｍで酸化チタンの含有率が４％の樹脂含浸紙とした。
比較例２では、比重が０．７５で厚さが１１．４ｍｍのパーティクルボードを木質系基材とし、透湿度が７ｇ／ｍ２・２４ｈの防湿シートとし、厚さが０．３ｍｍで酸化チタンの含有率が２％の樹脂含浸紙とした。
比較例３では、比重が０．７５で厚さが１１．４ｍｍのパーティクルボードを木質系基材とし、透湿度が７ｇ／ｍ２・２４ｈの防湿シートとし、厚さが０．３ｍｍで酸化チタンの含有率が１５％の樹脂含浸紙とした。 In Comparative Example 1, the specific gravity is thick particle board of 11.6mm and wood-based substrate in 0.75, moisture permeability and moisture-proof sheet of 7g / m 2 · 24h, titanium oxide thickness of 0.1mm A resin-impregnated paper having a content of 4% was prepared.
In Comparative Example 2, the specific gravity is thick particle board of 11.4mm and wood-based substrate in 0.75, moisture permeability and moisture-proof sheet 7 g / m 2 · 24h, titanium oxide thickness of 0.3mm A resin-impregnated paper having a content of 2% was prepared.
In Comparative Example 3, the specific gravity is thick particle board of 11.4mm and wood-based substrate in 0.75, moisture permeability and moisture-proof sheet of 7g / m 2 · 24h, titanium oxide thickness of 0.3mm A resin-impregnated paper having a content of 15% was prepared.

上記構成とされた各実施例の板状建材（またはその試験片）及び各比較例の板状建材（またはその試験片）に対して、以下のような評価試験を行った。
＜基材隠蔽性評価試験＞
実施例１〜６及び比較例１〜３の板状建材の表面を目視観察し、木質系基材の隠蔽性についての評価を行った。
結果は、図２に示すように、実施例１〜６及び比較例２、３では、板状建材の表面において木質系基材の濃淡等が確認できず、良好な結果であった。一方、比較例１では、樹脂含浸紙が薄いため板状建材の表面において木質系基材の濃淡等が目立つ結果となった。 The following evaluation tests were carried out on the plate-shaped building material (or its test piece) of each example having the above-mentioned configuration and the plate-shaped building material (or its test piece) of each comparative example.
<Base material hiding property evaluation test>
The surfaces of the plate-shaped building materials of Examples 1 to 6 and Comparative Examples 1 to 3 were visually observed to evaluate the hiding property of the wood-based base material.
As shown in FIG. 2, in Examples 1 to 6 and Comparative Examples 2 and 3, the shade of the wood-based base material could not be confirmed on the surface of the plate-shaped building material, which was a good result. On the other hand, in Comparative Example 1, since the resin-impregnated paper was thin, the shade of the wood-based base material was conspicuous on the surface of the plate-shaped building material.

＜溝部白度評価試験＞
実施例１〜６及び比較例１〜３の板状建材の溝部が形成された部位と溝部以外の部位の表面とを、分光側色計（コニカミノルタ株式会社製ＣＭ−２５００ｄ）で測定した。なお、溝部が形成された部位については、溝幅中心に測定径の中心を合わせて測定し、溝部以外の部位の表面については、測定径内に溝部が存在しない位置で、かつ各実施例１〜６及び比較例１〜３において差異が生じないように同様な模様部分を測定した。また、色差ΔＥ（Ｌ＊ａ＊ｂ＊表色系）が３．０未満を合格基準として判断した。
結果は、図２に示すように、実施例１〜６及び比較例３では、色差が３．０未満で良好な結果であった。一方、比較例１では、樹脂含浸紙が薄く、比較例２では、樹脂含浸紙の酸化チタンの含有率が小さいため、色差が３．０以上となった。 <Groove whiteness evaluation test>
The portion where the groove portion of the plate-shaped building material of Examples 1 to 6 and Comparative Examples 1 to 3 was formed and the surface of the portion other than the groove portion were measured with a spectroscopic side color meter (CM-2500d manufactured by Konica Minolta Co., Ltd.). For the portion where the groove is formed, the center of the measurement diameter is aligned with the center of the groove width, and the surface of the portion other than the groove is measured at a position where the groove does not exist within the measurement diameter and in each Example 1. Similar pattern portions were measured so as not to cause a difference in ~ 6 and Comparative Examples 1 to 3. Further, it was judged that the color difference ΔE (L * a * b * color system) was less than 3.0 as the acceptance criterion.
As a result, as shown in FIG. 2, in Examples 1 to 6 and Comparative Example 3, the color difference was less than 3.0, which was a good result. On the other hand, in Comparative Example 1, the resin-impregnated paper was thin, and in Comparative Example 2, the titanium oxide content of the resin-impregnated paper was small, so that the color difference was 3.0 or more.

＜剥離強度評価試験＞
実施例１〜６及び比較例１〜３の板状建材（試験片）に対して、木質系基材の種類に応じてＪＩＳ Ａ５９０８またはＪＩＳ Ａ５９０５に規定された方法に準拠して剥離強さ試験を行い、剥離強さが０．３Ｎ／ｍｍ２以上を合格基準として判断した。
結果は、図２に示すように、実施例１〜６及び比較例１、２では、剥離強さが０．３Ｎ／ｍｍ２以上で良好な結果であった。一方、比較例３では、樹脂含浸紙の酸化チタンの含有率が大きいため、剥離強さが０．３Ｎ／ｍｍ２未満であった。
＜膨れ評価試験＞
実施例１〜６及び比較例１〜３の板状建材（試験片）に対して、フローリングの日本農林規格の吸水厚さ膨張率試験に準拠して膨れ評価試験を行い、吸水厚さ膨張率が８％未満を合格基準として判断した。
結果は、図２に示すように、実施例１〜５及び比較例１〜３では、吸水厚さ膨張率が８％未満で良好な結果であった。一方、実施例６では、木質系基材の比重が他よりも小であるため、吸水厚さ膨張率が８％以上となり、耐水性についてはやや劣る結果となった。 <Peeling strength evaluation test>
Peel strength test on the plate-shaped building materials (test pieces) of Examples 1 to 6 and Comparative Examples 1 to 3 according to the method specified in JIS A5908 or JIS A5905 depending on the type of wood-based base material. Was performed, and the peel strength was judged to be 0.3 N / mm 2 or more as the acceptance criterion.
As shown in FIG. 2, in Examples 1 to 6 and Comparative Examples 1 and 2, the peel strength was 0.3 N / mm 2 or more, which was a good result. On the other hand, in Comparative Example 3, the peel strength was less than 0.3 N / mm 2 due to the high content of titanium oxide in the resin-impregnated paper.
<Swelling evaluation test>
The plate-shaped building materials (test pieces) of Examples 1 to 6 and Comparative Examples 1 to 3 were subjected to a swelling evaluation test in accordance with the water absorption thickness expansion coefficient test of the Japanese Agricultural Standard for flooring, and the water absorption thickness expansion coefficient was performed. Was judged as a passing criterion of less than 8%.
As shown in FIG. 2, in Examples 1 to 5 and Comparative Examples 1 to 3, the water absorption thickness expansion rate was less than 8%, which was a good result. On the other hand, in Example 6, since the specific gravity of the wood-based base material was smaller than that of the others, the water absorption thickness expansion rate was 8% or more, and the water resistance was slightly inferior.

＜反り評価試験＞
実施例１〜６及び比較例１〜３の板状建材に対して、床暖房システム試験（仕上げ材・下地材編「２．耐久性能 熱耐久性試験」ガス会社統一基準方式）に準拠し、温水床暖房マット上に配置して熱耐久性試験を行った。この評価試験では、温水床暖房マットに、８０℃の温水を１１００時間連続循環させた後、幅方向の反りを測定した。幅方向の反りは、各板状建材の幅方向両端の二点を基点とし、幅方向中央部位を測定点として、反り測定器具を用いて建材厚さ方向の反り量を計測した。また、反り量がプラスマイナス０．５ｍｍ以内を合格基準として判断した。
結果は、図２に示すように、実施例１〜４及び比較例１〜３では、反り量がプラスマイナス０．５ｍｍ以内で良好な結果であった。一方、実施例５では、防湿シートの透湿度が他よりも大で、実施例６では、木質系基材の比重が他よりも小であるため、反り量が大となり、やや劣る結果となった。 <Warp evaluation test>
The floor heating system test (finishing material / base material edition "2. Durability performance thermal durability test" gas company unified standard method) was applied to the plate-shaped building materials of Examples 1 to 6 and Comparative Examples 1 to 3. A thermal durability test was conducted by placing it on a hot water floor heating mat. In this evaluation test, the warp in the width direction was measured after continuously circulating hot water at 80 ° C. for 1100 hours on the hot water floor heating mat. The amount of warpage in the width direction was measured by using a warp measuring instrument with two points at both ends of each plate-shaped building material in the width direction as base points and a central portion in the width direction as a measurement point. In addition, it was judged that the amount of warpage was within plus or minus 0.5 mm as a passing criterion.
As shown in FIG. 2, in Examples 1 to 4 and Comparative Examples 1 to 3, the warp amount was within plus or minus 0.5 mm, which was a good result. On the other hand, in Example 5, the moisture permeability of the moisture-proof sheet is larger than the others, and in Example 6, the specific gravity of the wood-based base material is smaller than the others, so that the amount of warpage is large, resulting in a slightly inferior result. It was.

以上の結果から、実施例１〜６の板状建材は、比較例１〜３と比較して、基材隠蔽性、溝部白度及び剥離強度に優れることが示され、良好な結果となった。
また、実施例１〜４の各板状建材は、実施例５、６と比較して反りが抑制され、実施例６と比較して膨れが抑制されることが示され、特に良好な結果となった。 From the above results, it was shown that the plate-shaped building materials of Examples 1 to 6 were superior in base material hiding property, groove whiteness and peel strength as compared with Comparative Examples 1 to 3, and good results were obtained. ..
Further, it was shown that the plate-shaped building materials of Examples 1 to 4 were suppressed in warpage as compared with Examples 5 and 6 and swelling was suppressed as compared with Example 6, which was a particularly good result. became.

なお、上記した実施形態では、板状建材１の表面に溝部１４を設けた例を示しているが、このような溝部１４を設けないようにしてもよい。
また、上記した実施形態では、木質系基材１０の表面及び裏面に、防湿シート１１，１１を積層した例を示しているが、このような態様に限られない。木質系基材１０の表面及び裏面のうちの一方のみに防湿シート１１を積層した構成としてもよく、また、木質系基材１０の少なくとも裏面に防湿シート１１を積層した構成としてもよく、さらには、このような防湿シート１１を設けないようにしてもよい。
また、上記した例では、板状建材１を、床材として用いられるものとした例を示しているが、このような態様に限られず、天井材や壁材、建具材、家具材等として用いられるものとしてもよい。 In the above-described embodiment, an example in which the groove portion 14 is provided on the surface of the plate-shaped building material 1 is shown, but such a groove portion 14 may not be provided.
Further, in the above-described embodiment, an example in which the moisture-proof sheets 11 and 11 are laminated on the front surface and the back surface of the wood-based base material 10 is shown, but the present invention is not limited to such an embodiment. The moisture-proof sheet 11 may be laminated on only one of the front surface and the back surface of the wood-based base material 10, or the moisture-proof sheet 11 may be laminated on at least the back surface of the wood-based base material 10. , Such a moisture-proof sheet 11 may not be provided.
Further, in the above-mentioned example, an example in which the plate-shaped building material 1 is used as a floor material is shown, but the present invention is not limited to such an embodiment and is used as a ceiling material, a wall material, a fitting material, a furniture material, or the like. It may be done.

１ 板状建材
１０ 木質系基材
１１ 防湿シート
１２ 樹脂含浸紙 1 Plate-shaped building material 10 Wood-based base material 11 Moisture-proof sheet 12 Resin-impregnated paper

Claims (3)

木質系基材の表面側に、酸化チタンの含有率が４％以上、１０％以下で、厚さが０．２ｍｍ以上、１．０ｍｍ以下の樹脂含浸紙が積層されており、
前記樹脂含浸紙に含浸されている樹脂が熱硬化性樹脂であることを特徴とする板状建材。 A resin-impregnated paper having a titanium oxide content of 4% or more and 10% or less and a thickness of 0.2 mm or more and 1.0 mm or less is laminated on the surface side of the wood-based base material .
A plate-shaped building material characterized in that the resin impregnated in the resin-impregnated paper is a thermosetting resin. 請求項１において、
前記木質系基材の表面及び裏面には、透湿度が１０ｇ／ｍ２・２４ｈ以下の防湿シートが積層されており、
前記樹脂含浸紙は、表面側の防湿シートの表面に積層されていることを特徴とする板状建材。 In claim 1,
Wherein the front and back surfaces of the woody substrate, moisture permeability are stacked following proof sheet 10g / m 2 · 24h,
The resin-impregnated paper is a plate-shaped building material characterized in that it is laminated on the surface of a moisture-proof sheet on the front surface side. 請求項１または２において、
前記木質系基材は、比重が０．７３以上、１．５以下であることを特徴とする板状建材。 In claim 1 or 2,
The wood-based base material is a plate-shaped building material having a specific gravity of 0.73 or more and 1.5 or less.
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JPS54111558A (en) * 1978-02-21 1979-08-31 Matsushita Electric Works Ltd Manufacturing of thermosetting resin plate
JPH08174771A (en) * 1994-12-26 1996-07-09 Sekisui Chem Co Ltd Decorative molded product, sheet therefor, and manufacture thereof
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