JP3623344B2 - Wood finish - Google Patents

Wood finish Download PDF

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Publication number
JP3623344B2
JP3623344B2 JP23772897A JP23772897A JP3623344B2 JP 3623344 B2 JP3623344 B2 JP 3623344B2 JP 23772897 A JP23772897 A JP 23772897A JP 23772897 A JP23772897 A JP 23772897A JP 3623344 B2 JP3623344 B2 JP 3623344B2
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Japan
Prior art keywords
sheet
resin
fiber
impregnated
solid content
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JP23772897A
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Japanese (ja)
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JPH10114024A (en
Inventor
勢 青木
秀史 柳
竹一 吉田
道孝 竹下
正紀 阿部
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Bridgestone Corp
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Bridgestone Corp
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  • Finishing Walls (AREA)
  • Laminated Bodies (AREA)
  • Moulding By Coating Moulds (AREA)

Description

【0001】
【発明の属する技術分野】
この発明は、床、壁、天井等の表面仕上材又は柱、キャビネット、家具等の表面材あるいは自動車の内装材、さらには各種造作の表面材等として用いられる木質仕上材に関する。
【0002】
【従来の技術】
近年、ダニの発生防止等の観点から木質仕上材が急速に増加してきているが、表面の耐傷性に関する改善要求が多くなってきた。一般的な木質仕上材は、台板上に化粧張り用の木の薄板である突き板(化粧材)を貼り合わせたものであり、この突き板の表面に傷がつきにくいようにWPC処理したものが開発されている。WPCとは、ウッド・プラスチック・コンビネーションの略称であり、突き板を加熱・加圧容器へ入れ、プラスチックを強制的に突き板に含浸させたものを接着剤が塗布された台板に熱プレスして貼り合わせている。
【0003】
【発明が解決しようとする課題】
従来のWPC処理が施されたものは、価格が高くなるという欠点があった。
【0004】
そこで、この発明は、安価で耐傷性に優れた木質仕上材を提供することを目的とする。
【0005】
【課題を解決するための手段】
上述の目的を達成するため、この発明は、樹脂の含浸を可能とする台板上にシート基材に水に分散させたフェノール樹脂を含浸させたプリプレグ状態のシートを重ね合わせ、このシート上に樹脂の含浸を可能とする化粧材を重ね合わせて熱プレスして互いに接着した木質仕上材であって、前記シート基材として、坪量50〜250g/m、3〜15mmの短繊維が全繊維中20〜100%となるようにガラス繊維を単独で用いたガラス不織布を用い、前記フェノール樹脂は固形分20〜80%となるように分散され、かつシート基材に対して固形分150〜350g/mになるように含浸されるとともに、シートのできあがり水分含有率が3〜15重量%とされているものである。
【0006】
【発明の実施の形態】
以下に、この発明の好適な実施例を図面を参照にして説明する。
【0007】
図1に示す実施例では、台板1上に熱硬化性樹脂を含むシート2を貼り、このシート2上に化粧材3を貼ってある。
【0008】
台板1としては、樹脂の含浸を可能とする材質、例えば合板、木質系繊維ボード、パーティクルボード、ウエハーボード等あるいはこれらの複合板が好適に使用される。
【0009】
シート2はガラス不織布からなるシート基材20(図2参照)に熱硬化性樹脂を含浸させたものである。シート基材20として用いられる不織布は、ガラス繊維単独、若しくは、ガラス繊維と綿、レーヨンの混合繊維等の原料繊維を接着もしくは絡み合わせ或いはその双方を用いて機械的・化学的・加熱的もしくは溶媒を用いる方法、或いはそれらの組み合わせによって作られたシート状のものである。繊維原料としては、3〜50mmにカットされた繊維を湿式抄紙若しくは乾式不織布製造法によりマット化したものをバインダー樹脂で結合したものが使用に好適である。繊維原料としては、ガラス繊維単独、若しくはガラス繊維とアルミナ繊維、アルミナシリカ繊維、炭素繊維、金属繊維等の無機系繊維や、アラミド繊維、レーヨン繊維、ビニロン繊維、ナイロン繊維、ポリエステル繊維、ポリプロピレン繊維、ポリエチレン繊維等の有機系繊維を単独もしくは複数混合して用いることができる。シート基材の強度、樹脂含浸の容易さ等の点からガラス繊維を単独で用いることが好ましい。さらに、樹脂含浸性、脱泡性、シート基材強度、ハンドリング、成形品の耐傷性等の点から、ガラス不織布の坪量は10〜1000g/mであることが好ましく、さらに好ましくは50〜250g/mである。坪量が10g/mより少ないと、耐傷性が発現しにくく、1000g/mより多いと樹脂の含浸が困難となる。これらの繊維は3mm以下の短繊維では補強効果が低く、一方50mmを越える長繊維では均一シート化が困難であり、結果として優れた補強効果が得られない。また、3〜15mmの短繊維が全繊維中20〜100%であることが、強度(補強性)、不織布の均一性の点から好ましい。短繊維が20%より少ないと不織布の均一性が図れない。これら繊維材料の他に短繊維のセルロースパルプ等を混合することは差し支えない。また、ガラス繊維を用いる場合は、繊維表面をシランカップリング剤でコートしておくことにより、補強効果を高めることができる。
【0010】
シート基材20に含浸させる熱硬化性樹脂としては、表面材としての必要な特性がある樹脂が選択され、例えば、フェノール類とアルデヒド類との反応により得られるフェノール樹脂、末端に反応性のエポキシ基を持つオリゴマーに硬化剤を添加して得られるエポキシ樹脂、熱硬化エチレン酢酸ビニル共重合体、不飽和ポリエステル樹脂、ユリア樹脂、メラミン樹脂、ウレタン樹脂、尿素樹脂、DAP樹脂、不飽和ポリエステル樹脂等が例示できる。これらの樹脂は単独もしくは複数混合して主として含浸により繊維材料と複合化する。含浸する樹脂溶液として、水溶液、溶剤ワニス、エマルジョン等いずれでもよく、固形樹脂粉末を散布するやり方でもよい。この中でもコスト、安全性の点から水、アルコール等に溶解もしくは分散させたものを用いることが好ましい。アルコールを用いる場合、ふっ点が低く乾燥しやすいので、MeOHが好適である。さらにこれらに各種の充填剤、例えばステアリン酸鉛、ジブチル錫ジラウレート、カーボンブラック、炭酸カルシウム、チタンホワイト、雲母、ガラス球、水酸化アルミニウム、酸化アンチモン、トリ(2,3ジプロモプロピル)ホスフェート、脂肪族スルフォン酸塩、高級アルコール酸塩エステル等、熱安定剤、強化剤、難燃剤、帯電防止剤等が配合されて使用される。また、熱硬化性樹脂にフェノール樹脂を選んだ場合、樹脂の製造に必要な触媒としては、アルキルアミン、アンモニア、水酸化ナトリウム、水酸化バリウム等が好ましい。特に、アルキルアミン、アンモニアについては他の2つに比べ分子量も大きく、分子構造上、水和性が低いので貼り合わせ後の耐水性が飛躍的に向上する。
【0011】
熱硬化性樹脂は、シート基材20に、固形分50〜500g/m好ましくは150〜350g/mになるように含浸させる。50g/m未満だと充分な耐傷性を発現しにくく、500g/m以下でなければ硬化時間がかかり、端部からのはみだし等外観上も問題がある。含浸方法は、例えば図2に示すようにシート基材20をローラで樹脂溶液10中へディッピングし、その後一定条件下で乾燥させてプリプレグ状態のシート2を得る。
【0012】
シート2としてはガラス不織布を基材としてこれに熱硬化性樹脂を含浸させたものを単独で用いず、例えばこれを複数枚用いたり、これに紙を貼り合わせたものをシート2として用いることもできる。例えば、未硬化のフェノール樹脂をガラス不織布に含浸させ、これに紙を貼り合わせたものを用いれば全体の強度や寸法安定性が飛躍的に向上する。
【0013】
シート基材20に含浸させる熱硬化性樹脂は含浸後半硬化状態であることが望ましく、シート2はプリプレグ状態となり、これを台板1上に重ね、このプリプレグ状態のシート2上に化粧材3を重ね合わせ、これらを熱プレスすれば、互いに強固に接着される。プリプレグは、繊維補強剤と熱硬化性樹脂、その他必要に応じ熱可塑性樹脂、着色剤、硬化触媒等を混和してなる強化プラスチックの、接着性と成形性の能力を残した硬化終了前の半硬化状態の成形素材であり、好ましいゲルタイムは150℃の設定温度において30秒〜800秒である。
【0014】
シート基材20に含浸させる熱硬化性樹脂を、含浸後半硬化状態にするための乾燥条件として、シートのできあがり溶媒含有率を3〜15重量%、さらには5〜10重量%にすることが好ましく、3重量%未満では化粧材3や台板1との接着不良をおこし、15重量%以下でない場合は、シート同士ブロッキングをおこす。また、乾燥時間と温度の関係を表1に示す。表中○はでき上がりのプリプレグシートの状態が使用可能、△は使用するにあたりあまり好ましくない、×は使用不可能を示す。
【0015】
【表1】

Figure 0003623344
【0016】
表1に示すように80〜120℃の温度で乾燥時間2.5〜30分で好ましい半硬化状態のシートを得ることができる。
【0017】
プリプレグシートの引張強度としては、充分な耐傷性発現のためには、破断強度10kgf cm 以上であることが好ましい。10kgf cm 未満では充分な耐傷性が発現しない。破断強度の測定は、プリプレグ状態のシート2を2枚の離型紙間に挟み、150℃、5分、10kgf/cm の条件下で熱プレスして樹脂を硬化させた後のものについて行った。
【0018】
化粧材3は化粧張り用の木の薄板や予め模様等が印刷あるいは凹凸加工が施された紙等であり、厚みは1mm以下が好ましい。
【0019】
実施例1
台板1・・・12mm厚さの合板
化粧材3・・・0.3mm厚さの楢単板
ガラス不織布・・・繊維径10μm、短繊維と長繊維の混合繊維からなる坪量100g/mのガラス繊維単独のもの
熱硬化性樹脂・・・固形分40%の水分散系フェノール樹脂
樹脂含浸時の固形分・・・200g/m
上記のガラス不織布にフェノール樹脂を含浸させたもの(固形分200g/m)を105℃で10分間乾燥させて半硬化状態にしてシート2を得た。そして、台板1上にこのシート2を重ね合わせ、このシート2上に上記化粧材3を重ね合わせて、プレス温度150℃、圧力10kgf/cm、プレス時間5分で木質仕上材を製造した。
【0020】
実施例2
水分散系フェノール樹脂の固形分が300g/mになるように、固形分40%の水分散系フェノール樹脂をガラス不織布に含浸させ、その後乾燥させてシート2を得た。その他の条件は実施例1と同一条件下で木質仕上材を製造した。
【0021】
実施例3
台板1・・・12mm厚さの合板
化粧材3・・・0.3mm厚さの檜単板
ガラス不織布・・・繊維径10μm、短繊維と長繊維の混合繊維からなる坪量100g/mのガラス不織布に固形分58%のメタノール溶解系フェノール樹脂を含浸させて固形分200g/mのものを得、含浸後105℃で10分間乾燥させて半硬化のシート2を得た。
台板1上にシート2を重ね合わせ、シート2上に化粧材3を重ね合わせてプレス温度150℃、圧力10kgf/cm、プレス時間5分で木質仕上材を製造した。
【0022】
実施例4
実施例3と同様の台板1と化粧材3を使用し、実施例3と同一のガラス不織布に固形分58%のメタノール溶解系フェノール樹脂を含浸させて固形分300g/mのものを得、実施例1と同一条件で乾燥させて半硬化状態とした。接着時のプレス条件はプレス時間を10分とし、他の条件は実施例3と同一とした。
【0023】
比較例
シート2をクラフト紙に実施例1と同様のフェノール樹脂を含浸させて得た。その他の条件は実施例1と同一条件下で木質仕上材を製造した。
【0024】
これらの実施例1〜4、比較例に対して、JIS A−1408に準拠し、鋼球落下試験を行った。これは、2号鋼球をサンプル上に落下させたときのサンプルのくぼみ深さを測定するものである。
(1) 鋼球:2号剛球(540g)
(2) 落下高さ:0.75m
(3) サンプル支持法:砂上全面支持
その結果を表2を示す。
【0025】
【表2】
Figure 0003623344
【0026】
【発明の効果】
以上説明したように、この発明によれば、樹脂の含浸を可能とする台板上にシート基材に水に分散させたフェノール樹脂を含浸させたプリプレグ状態のシートを重ね合わせ、このシート上に樹脂の含浸を可能とする化粧材を重ね合わせて熱プレスして互いに接着した木質仕上材であって、前記シート基材として、坪量50〜250g/m、3〜15mmの短繊維が全繊維中20〜100%となるようにガラス繊維を単独で用いたガラス不織布を用い、前記フェノール樹脂は固形分20〜80%となるように分散され、かつシート基材に対して固形分150〜350g/mになるように含浸されるとともに、シートのできあがり水分含有率が3〜15重量%とされているので、シートの熱硬化性樹脂が化粧材に含浸して硬化し、化粧材の対傷性を向上させる。また、台板上に化粧材を接着するための接着剤は不要となり、熱プレスするだけで台板上にシート並びに化粧材を確実に貼り合わせることができるので、製造も容易である。さらに、温度や湿度の変化に対してもシートの存在により寸法安定性に優れ、強度面でも向上する。また、ガラス不織布を用いることでシートの強度を一層向上させ、樹脂の含浸性も良好となり、プリプレグ状態のシートの製造も容易となる。
【図面の簡単な説明】
【図1】この発明の好適な実施例を示す断面図。
【図2】シートの製造例を示す説明図。
【符号の説明】
1 台板
2 シート
3 化粧材[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a surface finishing material such as a floor, a wall and a ceiling, or a wood finishing material used as a surface material such as a pillar, cabinet, furniture or the like, an automobile interior material, and a surface material for various productions.
[0002]
[Prior art]
In recent years, wood finishing materials have been rapidly increasing from the viewpoint of preventing the occurrence of ticks, but there has been an increasing demand for improvement of surface scratch resistance. A common wood finish is a veneer (decorative material), which is a thin plate of wood for decoration, bonded to a base plate, and the surface of this veneer is subjected to WPC treatment so as not to be damaged. Things are being developed. WPC is an abbreviation for wood / plastic / combination. The veneer is placed in a heated / pressurized container, and the plastic is forcedly impregnated into the veneer and hot pressed onto the base plate coated with adhesive. Pasted together.
[0003]
[Problems to be solved by the invention]
The conventional WPC treatment has the disadvantage of increasing the price.
[0004]
Accordingly, an object of the present invention is to provide a wood finishing material that is inexpensive and excellent in scratch resistance.
[0005]
[Means for Solving the Problems]
In order to achieve the above-described object, the present invention superimposes a sheet in a prepreg state impregnated with a phenol resin dispersed in water on a sheet base material on a base plate that enables resin impregnation, and on this sheet. A wood finishing material in which decorative materials capable of impregnation with resin are superimposed and heat-pressed to adhere to each other, and as the sheet base material, all short fibers having a basis weight of 50 to 250 g / m 2 and 3 to 15 mm are provided. A glass nonwoven fabric using glass fiber alone so as to be 20 to 100% in the fiber is used, the phenol resin is dispersed so as to have a solid content of 20 to 80%, and a solid content of 150 to 150 % with respect to the sheet substrate. It is impregnated to 350 g / m 2 and the moisture content of the sheet is 3 to 15% by weight.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
Preferred embodiments of the present invention will be described below with reference to the drawings.
[0007]
In the embodiment shown in FIG. 1, a sheet 2 containing a thermosetting resin is pasted on a base plate 1, and a decorative material 3 is pasted on the sheet 2.
[0008]
The base plate 1 is preferably made of a material that can be impregnated with resin, such as plywood, wood fiber board, particle board, wafer board, or a composite board thereof.
[0009]
The sheet 2 is obtained by impregnating a sheet base material 20 (see FIG. 2) made of a glass nonwoven fabric with a thermosetting resin. The nonwoven fabric used as the sheet base material 20 is made of glass, fiber, cotton, rayon mixed fiber, or other raw materials such as adhesive, entangled, or both, mechanical, chemical, heating or solvent. It is the sheet-like thing made by the method using these, or those combination. As a fiber raw material, a material obtained by matting fibers cut to 3 to 50 mm into a mat by wet papermaking or a dry nonwoven fabric manufacturing method is suitable for use. As the fiber raw material, glass fiber alone or inorganic fiber such as glass fiber and alumina fiber, alumina silica fiber, carbon fiber, metal fiber, aramid fiber, rayon fiber, vinylon fiber, nylon fiber, polyester fiber, polypropylene fiber, Organic fibers such as polyethylene fibers can be used alone or in combination. In view of the strength of the sheet base material, the ease of resin impregnation, etc., it is preferable to use the glass fiber alone. Furthermore, the basis weight of the glass nonwoven fabric is preferably 10 to 1000 g / m 2 , more preferably 50 to 50% from the viewpoints of resin impregnation property, defoaming property, sheet base material strength, handling, scratch resistance of molded products, and the like. 250 g / m 2 . When the basis weight is less than 10 g / m 2 , the scratch resistance is hardly exhibited, and when it is more than 1000 g / m 2 , impregnation with the resin becomes difficult. These fibers have a low reinforcing effect for short fibers of 3 mm or less, while it is difficult to form a uniform sheet with long fibers exceeding 50 mm, and as a result, an excellent reinforcing effect cannot be obtained. Moreover, it is preferable from the point of intensity | strength (reinforcing property) and the uniformity of a nonwoven fabric that 3-15 mm short fiber is 20 to 100% in all the fibers. If the short fibers are less than 20%, the nonwoven fabric cannot be made uniform. In addition to these fiber materials, it is possible to mix cellulose fibers of short fibers. When glass fiber is used, the reinforcing effect can be enhanced by coating the fiber surface with a silane coupling agent.
[0010]
As the thermosetting resin to be impregnated into the sheet base material 20, a resin having necessary characteristics as a surface material is selected. For example, a phenol resin obtained by a reaction between a phenol and an aldehyde, a terminal reactive epoxy Epoxy resin, thermosetting ethylene vinyl acetate copolymer, unsaturated polyester resin, urea resin, melamine resin, urethane resin, urea resin, DAP resin, unsaturated polyester resin, etc. obtained by adding a curing agent to an oligomer having a group Can be illustrated. These resins are singly or mixed to be combined with the fiber material mainly by impregnation. The resin solution to be impregnated may be an aqueous solution, a solvent varnish, an emulsion, or the like, or may be a method of spraying solid resin powder. Among these, it is preferable to use those dissolved or dispersed in water, alcohol or the like from the viewpoint of cost and safety. When alcohol is used, MeOH is preferable because it has a low point and is easy to dry. In addition, various fillers such as lead stearate, dibutyltin dilaurate, carbon black, calcium carbonate, titanium white, mica, glass sphere, aluminum hydroxide, antimony oxide, tri (2,3 dipromopropyl) phosphate, fat Group stabilizer sulfonates, higher alcoholate esters, etc., heat stabilizers, reinforcing agents, flame retardants, antistatic agents and the like are blended and used. In addition, when a phenol resin is selected as the thermosetting resin, alkylamine, ammonia, sodium hydroxide, barium hydroxide or the like is preferable as a catalyst necessary for producing the resin. In particular, alkylamine and ammonia have a higher molecular weight than the other two, and are less hydratable in terms of molecular structure, so the water resistance after bonding is dramatically improved.
[0011]
The thermosetting resin is impregnated into the sheet base material 20 so as to have a solid content of 50 to 500 g / m 2, preferably 150 to 350 g / m 2 . If it is less than 50 g / m 2, it is difficult to develop sufficient scratch resistance. If it is not less than 500 g / m 2 , it takes a curing time, and there is a problem in appearance such as protrusion from the end. In the impregnation method, for example, as shown in FIG. 2, the sheet substrate 20 is dipped into the resin solution 10 with a roller, and then dried under certain conditions to obtain the sheet 2 in a prepreg state.
[0012]
As the sheet 2, a glass nonwoven fabric as a base material impregnated with a thermosetting resin is not used alone. For example, a plurality of sheets may be used, or a sheet bonded with paper may be used as the sheet 2. it can. For example, if an uncured phenolic resin is impregnated into a glass nonwoven fabric and paper is pasted on it, the overall strength and dimensional stability are dramatically improved.
[0013]
It is desirable that the thermosetting resin impregnated in the sheet base material 20 is in an impregnated second-half cured state, and the sheet 2 is in a prepreg state, which is overlaid on the base plate 1 and the decorative material 3 is placed on the prepreg state sheet 2. If they are superposed and hot-pressed, they are firmly bonded to each other. A prepreg is a reinforced plastic made by mixing a fiber reinforcing agent and a thermosetting resin, and if necessary, a thermoplastic resin, a colorant, a curing catalyst, etc. It is a molding material in a cured state, and a preferable gel time is 30 seconds to 800 seconds at a set temperature of 150 ° C.
[0014]
As a drying condition for making the thermosetting resin impregnated into the sheet base material 20 into a cured state in the latter half of the impregnation, it is preferable that the finished solvent content of the sheet is 3 to 15% by weight, more preferably 5 to 10% by weight. If it is less than 3% by weight, poor adhesion to the decorative material 3 and the base plate 1 is caused, and if not less than 15% by weight, the sheets are blocked. Table 1 shows the relationship between the drying time and temperature. In the table, ○ indicates that the finished prepreg sheet can be used, Δ indicates that it is not preferable for use, and X indicates that it cannot be used.
[0015]
[Table 1]
Figure 0003623344
[0016]
As shown in Table 1, a preferable semi-cured sheet can be obtained at a temperature of 80 to 120 ° C. and a drying time of 2.5 to 30 minutes.
[0017]
As the tensile strength of the prepreg sheet, a breaking strength of 10 kgf / cm 2 is required for sufficient scratch resistance. The above is preferable. 10 kgf / cm 2 If it is less than this, sufficient scratch resistance will not be exhibited. The measurement of the breaking strength was performed after the prepreg sheet 2 was sandwiched between two release papers and the resin was cured by hot pressing under conditions of 150 ° C., 5 minutes, 10 kgf / cm 2 . .
[0018]
The decorative material 3 is a thin plate of wood for decoration, or paper or the like on which a pattern or the like has been printed or roughened in advance, and the thickness is preferably 1 mm or less.
[0019]
Example 1
Base plate 1 ... 12mm thick plywood decorative material 3 ... 0.3mm thick glazed veneer glass nonwoven fabric ... Fiber diameter 10μm, basis weight 100g / m 2 consisting of mixed fibers of short and long fibers Glass fiber alone thermosetting resin ... Solid content when impregnated with 40% solids aqueous dispersion phenol resin resin ... 200 g / m 2
A sheet 2 obtained by impregnating the above-mentioned glass nonwoven fabric with a phenol resin (solid content: 200 g / m 2 ) was dried at 105 ° C. for 10 minutes to obtain a semi-cured state. And this sheet | seat 2 was piled up on the baseplate 1, and the said decorative material 3 was piled up on this sheet | seat 2, and the wood finishing material was manufactured with the press temperature of 150 degreeC, the pressure of 10 kgf / cm < 2 >, and the press time for 5 minutes. .
[0020]
Example 2
A glass nonwoven fabric was impregnated with an aqueous dispersion phenol resin having a solid content of 40% so that the solid content of the aqueous dispersion phenol resin was 300 g / m 2 , and then dried to obtain a sheet 2. The other conditions were the same as in Example 1 to produce a wood finish.
[0021]
Example 3
Base plate 1 ... 12mm thick plywood decorative material 3 ... 0.3mm thick glazed veneer glass nonwoven fabric ... Fiber diameter 10μm, basis weight 100g / m 2 consisting of mixed fibers of short and long fibers A glass non-woven fabric was impregnated with a methanol-soluble phenol resin having a solid content of 58% to obtain a solid content of 200 g / m 2 , and after impregnation, dried at 105 ° C. for 10 minutes to obtain a semi-cured sheet 2.
A sheet 2 was overlaid on the base plate 1 and a decorative material 3 was overlaid on the sheet 2 to produce a wood finishing material at a press temperature of 150 ° C., a pressure of 10 kgf / cm 2 , and a press time of 5 minutes.
[0022]
Example 4
Using the same base plate 1 and decorative material 3 as in Example 3, the same glass nonwoven fabric as in Example 3 was impregnated with a methanol-soluble phenol resin having a solid content of 58% to obtain a solid content of 300 g / m 2. Then, it was dried under the same conditions as in Example 1 to obtain a semi-cured state. The pressing conditions at the time of adhesion were the same as those in Example 3 except that the pressing time was 10 minutes.
[0023]
Comparative example A sheet 2 was obtained by impregnating kraft paper with the same phenol resin as in Example 1. The other conditions were the same as in Example 1 to produce a wood finish.
[0024]
A steel ball drop test was performed on these Examples 1 to 4 and Comparative Examples in accordance with JIS A-1408. This measures the indentation depth of a sample when No. 2 steel ball is dropped on the sample.
(1) Steel ball: No. 2 hard ball (540 g)
(2) Drop height: 0.75m
(3) Sample support method: Full support on sand The results are shown in Table 2.
[0025]
[Table 2]
Figure 0003623344
[0026]
【The invention's effect】
As described above, according to the present invention, a sheet in a prepreg state impregnated with a phenol resin dispersed in water on a sheet base material is overlaid on a base plate that allows resin impregnation, and the sheet is overlaid on the sheet. A wood finishing material in which decorative materials that allow resin impregnation are superposed and heat-pressed to adhere to each other. As the sheet base material, all short fibers having a basis weight of 50 to 250 g / m 2 and 3 to 15 mm are used. A glass nonwoven fabric using glass fiber alone so as to be 20 to 100% in the fiber is used, the phenol resin is dispersed so as to have a solid content of 20 to 80%, and a solid content of 150 to 150 % with respect to the sheet substrate. Since the sheet is impregnated so as to be 350 g / m 2 and the moisture content of the sheet is 3 to 15% by weight, the thermosetting resin of the sheet is impregnated into the decorative material and hardened. of Improves scratch resistance. In addition, an adhesive for adhering the decorative material on the base plate is not necessary, and the sheet and the decorative material can be securely bonded to the base plate only by hot pressing, so that the manufacture is easy. Furthermore, the presence of the sheet is excellent in dimensional stability against changes in temperature and humidity, and the strength is improved. Further, by using a glass nonwoven fabric, the strength of the sheet is further improved, the impregnation property of the resin is improved, and the production of the prepreg sheet is facilitated.
[Brief description of the drawings]
FIG. 1 is a sectional view showing a preferred embodiment of the present invention.
FIG. 2 is an explanatory diagram showing an example of manufacturing a sheet.
[Explanation of symbols]
1 Base plate 2 Sheet 3 Cosmetic material

Claims (2)

樹脂の含浸を可能とする台板上にシート基材に水に分散させたフェノール樹脂を含浸させたプリプレグ状態のシートを重ね合わせ、このシート上に樹脂の含浸を可能とする化粧材を重ね合わせて熱プレスして互いに接着した木質仕上材であって、
前記シート基材として、坪量50〜250g/m、3〜15mmの短繊維が全繊維中20〜100%となるようにガラス繊維を単独で用いたガラス不織布を用い、
前記フェノール樹脂は固形分20〜80%となるように分散され、かつシート基材に対して固形分150〜350g/mになるように含浸されるとともに、シートのできあがり水分含有率が3〜15重量%とされていることを特徴とする木質仕上材。
A sheet in a prepreg state impregnated with a phenol resin dispersed in water is superimposed on a base plate that allows resin impregnation, and a cosmetic material that allows resin impregnation is superimposed on the sheet. It is a wood finish that is heat pressed and bonded together,
As the sheet base material, a glass nonwoven fabric using a glass fiber alone so that a short fiber having a basis weight of 50 to 250 g / m 2 and a length of 3 to 15 mm is 20 to 100% in the total fiber,
The phenol resin is dispersed so as to have a solid content of 20 to 80%, and impregnated so as to have a solid content of 150 to 350 g / m 2 with respect to the sheet base material. A wood finish characterized in that it is ˜15% by weight.
前記ガラス繊維をシランカップリング剤でコートしたことを特徴とする請求項1に記載の木質仕上材。2. The woody finishing material according to claim 1, wherein the glass fiber is coated with a silane coupling agent.
JP23772897A 1996-08-19 1997-08-19 Wood finish Expired - Fee Related JP3623344B2 (en)

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EP0956933A4 (en) * 1997-11-28 2002-01-30 Bridgestone Corp Ligneous finishing material
GB2383295A (en) * 2001-12-19 2003-06-25 Michael Ghahari Repairable solid surface laminate
US20040052997A1 (en) 2002-09-17 2004-03-18 Ietsugu Santo Composite pressure container or tubular body and composite intermediate
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