JP2004284043A - Anti-staining decorative sheet - Google Patents

Anti-staining decorative sheet Download PDF

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Publication number
JP2004284043A
JP2004284043A JP2003075567A JP2003075567A JP2004284043A JP 2004284043 A JP2004284043 A JP 2004284043A JP 2003075567 A JP2003075567 A JP 2003075567A JP 2003075567 A JP2003075567 A JP 2003075567A JP 2004284043 A JP2004284043 A JP 2004284043A
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Japan
Prior art keywords
resin
impregnated
paper
transfer sheet
photocatalyst
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JP2003075567A
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Japanese (ja)
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JP4179459B2 (en
Inventor
Hirokazu Imai
広和 今井
Katsumi Honma
勝己 本間
Mitsuo Ando
三津雄 安藤
Tsuneo Mihashi
恒夫 三橋
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Aica Kogyo Co Ltd
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Aica Kogyo Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide an anti-staining decorative sheet improved in the adhesion with a photocatalyst layer and capable of keeping a photocatalytic decomposition capacity over a long period of time. <P>SOLUTION: A core material, resin impregnated decorative paper and a plastic film are coated with a photocatalyst-containing composition and a transfer sheet coated with a binder is laminated on those coated materials. After the whole of them are molded under heating and pressure, the transfer sheet is removed. Further, a resin impregnated surface paper sheet is interposed between the resin impregnated decorative paper sheet and the transfer sheet. After the transfer sheet is removed, the remaining laminate is irradiated with ultraviolet rays. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

【0001】
【産業上の利用分野】
本発明は化粧板に関し、より詳しくは表面の汚れが光により分解されやすい防汚性化粧板に関する。
【0002】
【特許文献1】特開2002−225191
【特許文献2】特開2000−62128
【特許文献3】特開平11−115093
【0003】
【従来の技術】
従来、テーブル、カウンター、キッチンなどの水平面や、壁、ブースなどの垂直面に供される化粧板があり、例えば耐摩耗性、耐衝撃性などの諸物性に優れるジアリルフタレート樹脂化粧板やメラミン樹脂化粧板などの熱硬化性樹脂化粧板が広く用いられている。
【0004】
【発明が解決しようとする課題】
しかしながら、化粧板の表面には日常生活上種々の汚染物質が付着し、放置すると容易に除去できなくなることがあった。
特に化粧表面にエンボス加工が施されている場合は、力を入れて布等で擦ることを余儀なくされ、たとえ表面がフラットであっても、その表面は金属プレートやプラスチックフィルムの超微細な面が転写されたものであることから簡単に、しかも楽に汚れを除去できるというものではなかった。
【0005】
【課題を解決するための手段】
本発明はかかる状況に鑑み検討されたもので以下のことを特徴とするものである。すなわち、請求項1記載の発明である。また、請求項2記載の発明である。更に、請求項3記載の発明である。
以下、本発明について詳細に説明する。
【0006】
本発明で用いるコア基材としては、化粧板用のクラフト紙、不織布、クロスなどに熱硬化性樹脂から樹脂を含浸処理した樹脂含浸コア紙や、合板、MDF(中密度繊維板)、パーティクルボードなどの木質系基材が挙げられ、適宜、用途、要求される品質により選択される。
【0007】
中でもコア基材は、耐水性、強度、耐熱性などの物性面からクラフト紙を用いた樹脂含浸コア紙が好ましく、含浸用に供される樹脂としては、フェノール樹脂、不飽和ポリエステル樹脂、アミノ−ホルムアルデヒド樹脂などの熱硬化性樹脂からなる樹脂液を含浸し、乾燥したものが用いられるが、とりわけ、強度、耐熱性などに優れるフェノール樹脂が好ましい。フェノール樹脂はフェノール類とアルデヒド類とをフェノール性水酸基1モルに対してアルデヒド類を1〜1.3モルの割合で塩基性触媒下にて反応させることにより得ることができる。
【0008】
フェノール類としては、フェノール、クレゾール、キシレノール、オクチルフェノール、フェニルフェノール、ビスフェノールA、ビスフェノールS、ビスフェノールFなどが挙げられ、アルデヒド類としては、ホルムアルデヒド、パラホルムアルデヒド、グリオキザール、トリオキザールなどが挙げられる。また、必要に応じてパラスルフォンアミド、桐油、DOP、TCP(トリクレジルホスフェート)などの可塑化を促す変性剤で変性されたものも適用でき、塩基性触媒としては、ナトリウム、カリウムなどのアルカリ金属、及びマグネシウム、カルシウムなどのアルカリ土類金属の酸化物や水酸化物、及びトリエチルアミン、トリエタノールアミンなどのアミン類が挙げられる。
【0009】
樹脂含浸化粧紙は、坪量が60〜180g/mで、着色、あるいは印刷により各種の模様を施した化粧板用の化粧紙に、熱硬化性樹脂からなる樹脂液を含浸し、乾燥処理したもので、樹脂含浸表面紙は、熱圧成形後透明となる化粧板用の表面紙で坪量は18〜60g/mである。
樹脂含浸表面紙は樹脂含浸化粧紙に耐摩耗性が必要とされる場合に積層されて熱圧成形される。
【0010】
熱硬化性樹脂としては、ジアリルフタレート樹脂、不飽和ポリエステル樹脂、アミノ−ホルムアルデヒド樹脂、あるいはこれらの混合物などが例示され、とりわけ、耐熱性、耐水性などの表面物性の面からアミノ−ホルムアルデヒド樹脂を用いるのが好ましい。
【0011】
アミノ−ホルムアルデヒド樹脂としてはアミノ化合物、例えばメラミン、尿素、ベンゾグアナミン、アセトグアナミンなどとホルムアルデヒドを反応させた初期縮合物のほか、メチルアルコール、エチルアルコールなどの低級アルコ−ルによるエ−テル化、パラトルエンスルホンアミドなどの可塑化を促す反応性変性剤で変性されたものが適用できる。
【0012】
プラスチックフィルムとしては、例えば、ポリエステルフィルム、ポリプロピレン、ポリエチレンなどのポリオレフィンフィルム、ナイロンに代表されるポリアミドフィルム、ポリ塩化ビニルフィルム、ポリカーボネートフィルム、アクリル系フィルム、フッ素系フィルムなどを挙げることができる。これらのうち、機械的強度、寸法安定性などが優れポリエステルフィルムが好ましく用いられる。
金属箔としては、アルミニウム箔、銅箔などが挙げられる。
【0013】
ポリエステルフィルムは、エステル結合を主鎖の主要な結合鎖とする高分子化合物からなるフィルムの総称であり、特に好ましいポリエステルフィルムとしては、ポリエチレンテレフタレートフィルム、ポリエチレン−2、6ナフタレートフィルム、ポリブチレンテレフタレートフィルム、ポリブチレン−2、6ナフタレートフィルムなどを挙げることができ、これらの中でもポリエチレンテレフタレートフィルム、ポリエチレン−2、6ナフタレートフィルムが好ましい。
【0014】
プラスチックフルムの表面に塗布される光触媒含有組成物は光触媒とシリカ系バインダー、界面活性剤、及び必要に応じて用いる光触媒活性触媒などからなるもので、光触媒は、特定の波長の光が照射されると光化学反応を起こすことにより有機物を分解する触媒として作用したり、抗菌または防黴作用等の働きが得られる金属酸化物のことをいい、例えば、酸化チタン(TiO)、酸化亜鉛(ZnO)、酸化錫(SnO)、チタン酸ストロンチウム(SrTiO)、酸化セリウム(CeO)、酸化鉄(Fe)等が挙げられ、これらの酸化物のうち、太陽光や日常生活で用いられる照明光で高い触媒活性を有する酸化チタンがとりわけ望ましい。
【0015】
酸化チタンとしてはルチル型酸化チタン、アナターゼ型酸化チタン、ブルッカイト型酸化チタンなどが例示されるが、アナターゼ型の方が入手しやすく安価で特性が安定しており、かつ、人体に無害であり、光触媒として優れた効果を発揮し好ましい。
【0016】
更に、熱硬化性樹脂化粧板の表面の柄、色調を妨げない範囲で白金、ルテニウム、銀、酸化ルテニウム、ニオブ、銅、スズ、酸化ニッケルなどの金属及び金属酸化物を光触媒活性促進剤として酸化チタン表面に付着または被覆させてもよい。
【0017】
光触媒含有組成物中には光触媒である金属酸化物とシリカ系バインダーとの密着性をより強固なものとするため、チタニウム系カップリング剤、シラン系カップリング剤を含ませてもよい。
【0018】
光触媒含有組成物の塗布方法としては、スプレ−コ−ティング法、フロ−コ−ティング法、バーコート法、ロ−ルコ−ティング法、刷毛塗り、スポンジ塗りなどの公知の方法が利用でき、塗布量はwet状態で1〜10g/m、固形分で0.1〜5g/mが好ましい。下限に満たないと光触媒分解性能が劣りやすく、上限を超えると白化しやすく塗布ムラが起こり、また、光触媒粒子が表面に出なくなり光触媒分解性能が劣りやすくなる。
【0019】
バインダー剤は前述の光触媒組成物との密着を強固にし、光触媒を固着するためのもので、例えば、光触媒作用による分解機能の影響を受けない化1で示されるシラン化合物、あるいは分解機能に耐えるポリシロキサン、シリコーン変性樹脂などが利用できる。
【0020】
【化1】

Figure 2004284043
(式中、nは0、1、2、3のいずれかの整数を表し、RはCからCのアルキル基、フェニル基、ビニル基、γ−グリシドキシプロピル基、γ−メタクリロキシプロピル基、γ−(2−アミノエチル)アミノプロピル基、γ−クロロプロピル基、γ−メルカプトプロピル基、γ−アミノプロピル基、1−アクリロキシプロピル基などが挙げられる。)
【0021】
Xについて式中バインダーとして効果的なものはアルコキシ基で、nが0〜3の整数であるアルコキシシランとしては、例えば、nが0の場合、テトラメトキシシラン、テトラエトキシシラン、テトラプロポキシシラン、テトラブトキシシランなどの4官能シランが挙げられる。nが1の場合は、メチルトリメトキシシラン、メチルトリエトキシシラン、エチルトリメトキシシラン、エチルトリエトキシシラン、プロピルトリメトキシシラン、プロピルトリエトキシシランなど3官能シランが挙げられる。nが2の場合は、ジメチルジメトキシシラン、ジメチルジエトキシシラン、ジフェニルジメトキシシラン、ジフェニルジエトキシシランなどの2官能シランが挙げられる。nが3の場合は、トリメチルメトキシシラン、トリメチルエトキシシラン、トリメチルイソプロポキシシラン、ジメチルイソブチルメトキシシランなどの単官能シランが挙げられる。
【0022】
ポリシロキサンとしては、前述のアルコキシシランの如き加水分解性シリコーン化合物モノマーあるいはこれらの部分加水分解生成物から得られる重合体や、コロイダルシリカなどを挙げることができる。
【0023】
シリコーン変性樹脂は、合成樹脂にシリコーンを導入したもので、合成樹脂としては、例えば、アクリル樹脂、エポキシ樹脂、アルキッド樹脂、ウレタン樹脂、ポリエステル樹脂などの合成樹脂などが挙げられる。シリコーンが導入された合成樹脂の内、アクリルシリコーン樹脂、エポキシシリコーン樹脂は、成膜性、膜強度及び担体との密着性の点で優れている。
【0024】
コロイダルシリカは、シリカ微粒子が溶媒中にコロイド状に分散されたものであり、5〜100nmの平均粒子径を有するものが使用される。コロイダルシリカのゾルとしては水性シリカゾルとオルガノシリカゾルがあり、どちらも適用可能であるが、樹脂含浸紙、光触媒との密着を考慮すればオルガノシリカゾルを使用することが好ましい。
オルガノシリカゾルは乾燥されることによって、コロイド粒子の凝集結合力が作用して、シリカの3次元長鎖状網目構造となる。
【0025】
コロイダルシリカのゾル中のシリカ濃度は5〜50重量%のものであり、有機溶媒としては、メタノール、エタノール、イソプロパノール、n−ブタノール、イソブタノール等の低級脂肪族アルコール類;エチレングリコール、エチレングリコールモノメチルエーテル(メチルセロソルブ)、エチレングリコールモノエチルエーテルアセテート(セロソルブアセテート)、エチレングリコールモノエチルエーテル(セロソルブ)、エチレングリコールモノブチルエーテル(ブチルセロソルブ)、酢酸エチレングリコールモノエチルエーテル等のエチレングリコール誘導体;ジエチレングリコール、ジエチレングリコールモノブチルエーテル等のジエチレングリコール誘導体;ジアセトンアルコール、メチルエチルケトン、メチルイソブチルケトン、キシレン/n−ブタノール混合溶媒等を挙げることができる。
【0026】
バインダー剤の塗布方法としては公知の手段、例えば、リバースロール法、ダイレクトロール法、ブレード法、ナイフ法、カーテン法、グラビアロール法、バーコート法、ディップ法、キスコート法、スクイズ法、噴霧、吹き付けなどを採用することができる。
塗布量は固形分で0.1〜50g/mであればよく、塗布量が下限に満たないと、光触媒の密着性が劣りやすく、上限を超えると白化し、熱可塑性フィルムから脱落しやすくなる。
【0027】
本発明の防汚性化粧板は、コア材と、樹脂含浸化粧紙と、必要に応じて樹脂含浸表面紙と、プラスチックフィルムに光触媒含有組成物を塗布し、更にこの上にバインダー剤を塗布した転写シートとを順次積層され、熱圧成形後、該転写シートが除去することにより得られるが、該転写シートを除去した後、紫外線を照射すると、より光触媒分解性能が向上する。
【0028】
本発明の防汚性化粧板の光触媒層を光励起させるための光源としては、蛍光灯、白熱電灯、メタルハライドランプ、水銀ランプ、太陽光などが挙げられ、これらの光のより汚れが分解される。
【0029】
以下、本発明について、実施例に基づいてより詳細に説明する。
【実施例】
実施例1
Figure 2004284043
転写フィルム
厚み25μmの艶消しポリプロピレンフィルムに、光触媒含有組成物を固形分で4g/m塗布し、更にこの上にオルガノシリカゾル(NPC−ST−30 日産化学株式会社製 固形分濃度30重量%)を固形分で4g/m塗布して転写フィルムを得た。
メラミン樹脂含浸化粧紙
坪量100g/mの白色無柄の化粧紙に前記のメラミン樹脂液を含浸量が固形分換算値で100g/mとなるように含浸し乾燥してメラミン樹脂含浸化粧紙を得た。
フェノール樹脂含浸紙
フェノールとホルムアルデヒドのモル比を1:1.15とし水酸化ナトリウム下で反応させてレゾール型フェノール樹脂を得た後、190g/mのクラフト紙に含浸量が固形分換算値で90g/mとなるように含浸し乾燥してフェノール樹脂含浸紙を得た。
防汚性化粧板の製造
フェノール樹脂含浸紙4枚と、メラミン樹脂含浸化粧紙1枚とメラミン樹脂含浸表面紙1枚と、転写フィルムをオルガノシリカゾルが塗布された面がメラミン樹脂含浸表面紙に当接されるように順次積層し、ステンレスプレートを配して温度170℃、圧力50kg/cm、時間100分の条件で熱圧成形した。
熱圧成形後、転写フィルムを除去して、実施例1の防汚性化粧板を得た。
【0030】
実施例1の防汚性化粧板の表面に、12mW/cmの紫外線を30分照射して、実施例2の防汚性化粧板を得た。
【0031】
実施例3
メラミン樹脂含浸表面紙
メラミンに対するホルムアルデヒドのモル比が1.5のメラミン初期縮合物にパラトルエンスルホン酸アミド6部、硬化剤(キャタニットA 日東理研工業株式会社社製)3部、離型剤1部(セパ−ル328 中京油脂株式会社社製)を添加してメラミン樹脂液を得た、坪量22g/mの表面紙に含浸用樹脂を含浸量が固形分換算値で55g/mとなるように含浸し乾燥してメラミン樹脂含浸表面紙を得た。
実施例1において、メラミン樹脂含浸表面紙をメラミン樹脂含浸化粧紙の上に配した以外は同様に実施して、実施例3の防汚性化粧板を得た。
【0032】
評価結果を表1に示す。
【表1】
Figure 2004284043
【0033】
評価方法
光触媒分解機能
実施例1、2の防汚性化粧板について、500ppmのメチレンブルー溶液を塗布し、色測計にてLabを測定し、20Wブラックライトを光源として、1mW/cmの紫外線に2時間暴露し、Labを測定して色差ΔEを測定し、式1により分解率(%)を算出した。
また、同様に4時間曝し、分解率(%)を算出した。
【式1】
Figure 2004284043
ここで、L、a、bは試験体そのものの色、LMB、aMB、bMBはメチレンブルー溶液塗布後の色、Luv、auv、buvは光照射後の色を示し、ΔEuvは、光照射後とメチレンブルー溶液塗布後との色差、ΔEMBは、メチレンブルー溶液塗布後と試験体そのものとの色差である。
【0034】
【発明の効果】
本発明の防汚性化粧板は、樹脂含浸紙の表面に熱圧成形と同時に光触媒層が転写され、バインダー剤を用いることにより、光触媒層との密着がよく、光触媒分解性能を長期に渡って維持することができる。
【図面の簡単な説明】
【図1】防汚性化粧板の製造方法を示す模式構成断面図。
【符号の説明】
1 プラスチックフィルム
2 光触媒含有層
3 バインダー剤層
4 転写フィルム
5 樹脂含浸表面紙
6 樹脂含浸化粧紙
7 樹脂含浸コア紙
9 防汚性化粧板[0001]
[Industrial applications]
The present invention relates to a decorative board, and more particularly to an antifouling decorative board in which surface dirt is easily decomposed by light.
[0002]
[Patent Document 1] JP-A-2002-225191
[Patent Document 2] JP-A-2000-62128
[Patent Document 3] JP-A-11-115093
[0003]
[Prior art]
Conventionally, there is a decorative plate provided on a horizontal surface such as a table, a counter, and a kitchen, and a vertical surface such as a wall or a booth.For example, a diallyl phthalate resin decorative plate or a melamine resin having excellent physical properties such as abrasion resistance and impact resistance. Thermosetting resin decorative boards such as decorative boards are widely used.
[0004]
[Problems to be solved by the invention]
However, various contaminants adhere to the surface of the decorative board in daily life, and sometimes cannot be easily removed when left unattended.
In particular, if the decorative surface is embossed, it must be rubbed with a cloth or the like with force.Even if the surface is flat, the surface is not covered by the ultra-fine surface of a metal plate or plastic film. Since it was transferred, dirt was not easily and easily removed.
[0005]
[Means for Solving the Problems]
The present invention has been made in view of such circumstances, and has the following features. That is, the invention according to claim 1 is provided. Further, the invention according to claim 2 is provided. Further, the invention according to claim 3 is provided.
Hereinafter, the present invention will be described in detail.
[0006]
Examples of the core base material used in the present invention include resin-impregnated core paper obtained by impregnating resin such as kraft paper, nonwoven fabric, cloth, and the like from a thermosetting resin for plywood, plywood, MDF (medium density fiberboard), particle board And the like, and the material is appropriately selected depending on the use and required quality.
[0007]
Above all, the core substrate is preferably a resin-impregnated core paper using kraft paper from the viewpoint of physical properties such as water resistance, strength and heat resistance, and as the resin used for impregnation, phenol resin, unsaturated polyester resin, amino- A resin impregnated with a resin liquid composed of a thermosetting resin such as a formaldehyde resin and dried is used, and a phenol resin excellent in strength, heat resistance and the like is particularly preferable. A phenol resin can be obtained by reacting a phenol with an aldehyde at a ratio of 1 to 1.3 mol of the aldehyde to 1 mol of the phenolic hydroxyl group under a basic catalyst.
[0008]
Examples of phenols include phenol, cresol, xylenol, octylphenol, phenylphenol, bisphenol A, bisphenol S, bisphenol F, and aldehydes include formaldehyde, paraformaldehyde, glyoxal, and trioxal. Further, if necessary, those modified with a modifier that promotes plasticization such as parasulfonamide, tung oil, DOP, TCP (tricresyl phosphate) can be applied. As the basic catalyst, an alkali such as sodium or potassium can be used. Oxides and hydroxides of metals and alkaline earth metals such as magnesium and calcium, and amines such as triethylamine and triethanolamine.
[0009]
The resin-impregnated decorative paper has a basis weight of 60 to 180 g / m 2 , and a decorative paper for decorative board on which various patterns are formed by coloring or printing is impregnated with a resin liquid made of a thermosetting resin, and then dried. The resin-impregnated surface paper is a surface paper for a decorative board that becomes transparent after hot pressing, and has a basis weight of 18 to 60 g / m 2 .
The resin-impregnated surface paper is laminated and hot-pressed when abrasion resistance is required for the resin-impregnated decorative paper.
[0010]
Examples of the thermosetting resin include a diallyl phthalate resin, an unsaturated polyester resin, an amino-formaldehyde resin, and a mixture thereof. Is preferred.
[0011]
Examples of the amino-formaldehyde resin include an initial condensate obtained by reacting an amino compound such as melamine, urea, benzoguanamine, acetoguanamine and the like with formaldehyde, etherification with a lower alcohol such as methyl alcohol and ethyl alcohol, and paratoluene. Those modified with a reactive modifier that promotes plasticization, such as sulfonamide, can be used.
[0012]
Examples of the plastic film include polyester films, polyolefin films such as polypropylene and polyethylene, polyamide films represented by nylon, polyvinyl chloride films, polycarbonate films, acrylic films, and fluorine films. Among them, a polyester film having excellent mechanical strength and dimensional stability is preferably used.
Examples of the metal foil include an aluminum foil and a copper foil.
[0013]
The polyester film is a generic name of a film composed of a polymer compound having an ester bond as a main bonding chain, and particularly preferable polyester films include polyethylene terephthalate film, polyethylene-2,6-naphthalate film, and polybutylene terephthalate. Examples thereof include a film and a polybutylene-2,6-naphthalate film. Of these, a polyethylene terephthalate film and a polyethylene-2,6-naphthalate film are preferable.
[0014]
The photocatalyst-containing composition applied to the surface of the plastic film is composed of a photocatalyst and a silica-based binder, a surfactant, and a photocatalyst active catalyst used as necessary, and the photocatalyst is irradiated with light of a specific wavelength. A metal oxide that acts as a catalyst to decompose organic substances by causing a photochemical reaction with the metal oxide or that has an antibacterial or antifungal effect. For example, titanium oxide (TiO 2 ), zinc oxide (ZnO) , Tin oxide (SnO), strontium titanate (SrTiO 3 ), cerium oxide (CeO), iron oxide (Fe 2 O 3 ), and the like. Of these oxides, sunlight and lighting used in daily life Titanium oxide which has high catalytic activity in light is particularly desirable.
[0015]
Examples of the titanium oxide include rutile-type titanium oxide, anatase-type titanium oxide, brookite-type titanium oxide, and the like.The anatase-type is easily available, is inexpensive, has stable properties, and is harmless to the human body. It is preferable because it exhibits an excellent effect as a photocatalyst.
[0016]
In addition, metals and metal oxides such as platinum, ruthenium, silver, ruthenium oxide, niobium, copper, tin and nickel oxide are oxidized as a photocatalytic activity accelerator within a range that does not interfere with the pattern and color tone of the surface of the thermosetting resin decorative board. It may be attached or coated on the titanium surface.
[0017]
The photocatalyst-containing composition may contain a titanium-based coupling agent or a silane-based coupling agent in order to further increase the adhesion between the metal oxide serving as the photocatalyst and the silica-based binder.
[0018]
As a method for applying the photocatalyst-containing composition, known methods such as a spray coating method, a flow coating method, a bar coating method, a roll coating method, a brush coating, and a sponge coating can be used. the amount is 1 to 10 g / m 2 in wet state, 0.1-5 g / m 2 is preferred solids. If it is less than the lower limit, the photocatalytic decomposition performance tends to be inferior. If it exceeds the upper limit, whitening is apt to occur, and coating unevenness occurs.
[0019]
The binder agent strengthens the adhesion to the photocatalyst composition and fixes the photocatalyst. For example, the binder agent is a silane compound represented by Chemical Formula 1 which is not affected by the decomposition function due to the photocatalysis, or a poly withstands the decomposition function. Siloxane, silicone-modified resin and the like can be used.
[0020]
Embedded image
Figure 2004284043
(In the formula, n represents an integer of 0, 1, 2, or 3, and R 1 represents a C 1 to C 4 alkyl group, phenyl group, vinyl group, γ-glycidoxypropyl group, γ-methacrylic acid. Roxypropyl group, γ- (2-aminoethyl) aminopropyl group, γ-chloropropyl group, γ-mercaptopropyl group, γ-aminopropyl group, 1-acryloxypropyl group, and the like.
[0021]
For X, an effective group as a binder in the formula is an alkoxy group. As the alkoxysilane in which n is an integer of 0 to 3, for example, when n is 0, tetramethoxysilane, tetraethoxysilane, tetrapropoxysilane, tetrapropane Examples include tetrafunctional silanes such as butoxysilane. When n is 1, trifunctional silanes such as methyltrimethoxysilane, methyltriethoxysilane, ethyltrimethoxysilane, ethyltriethoxysilane, propyltrimethoxysilane, and propyltriethoxysilane are exemplified. When n is 2, bifunctional silanes such as dimethyldimethoxysilane, dimethyldiethoxysilane, diphenyldimethoxysilane, and diphenyldiethoxysilane are exemplified. When n is 3, monofunctional silanes such as trimethylmethoxysilane, trimethylethoxysilane, trimethylisopropoxysilane, and dimethylisobutylmethoxysilane are exemplified.
[0022]
Examples of the polysiloxane include a hydrolyzable silicone compound monomer such as the alkoxysilane described above, a polymer obtained from a partial hydrolysis product thereof, and colloidal silica.
[0023]
The silicone-modified resin is obtained by introducing silicone into a synthetic resin, and examples of the synthetic resin include synthetic resins such as an acrylic resin, an epoxy resin, an alkyd resin, a urethane resin, and a polyester resin. Among the synthetic resins into which silicone has been introduced, acrylic silicone resins and epoxy silicone resins are excellent in terms of film formability, film strength and adhesion to a carrier.
[0024]
Colloidal silica is obtained by dispersing silica fine particles in a colloidal state in a solvent, and has an average particle diameter of 5 to 100 nm. As the colloidal silica sol, there are aqueous silica sol and organosilica sol, both of which are applicable. However, in consideration of adhesion to resin-impregnated paper and photocatalyst, it is preferable to use organosilica sol.
By drying the organosilica sol, the cohesive bonding force of the colloidal particles acts to form a three-dimensional long chain network structure of silica.
[0025]
The colloidal silica sol has a silica concentration of 5 to 50% by weight, and the organic solvent includes lower aliphatic alcohols such as methanol, ethanol, isopropanol, n-butanol and isobutanol; ethylene glycol, ethylene glycol monomethyl Ethylene glycol derivatives such as ether (methyl cellosolve), ethylene glycol monoethyl ether acetate (cellosolve acetate), ethylene glycol monoethyl ether (cellosolve), ethylene glycol monobutyl ether (butyl cellosolve), and ethylene glycol monoethyl ether acetate; diethylene glycol, diethylene glycol mono Diethylene glycol derivatives such as butyl ether; diacetone alcohol, methyl ethyl ketone, methyl isobutyl ketone Emissions, may be mentioned xylene / n-butanol mixed solvent.
[0026]
Known methods of applying the binder agent include, for example, a reverse roll method, a direct roll method, a blade method, a knife method, a curtain method, a gravure roll method, a bar coat method, a dip method, a kiss coat method, a squeeze method, spraying, and spraying. Etc. can be adopted.
The coating amount may be 0.1 to 50 g / m 2 as a solid content. If the coating amount is less than the lower limit, the adhesion of the photocatalyst is likely to be inferior, and if it exceeds the upper limit, it is whitened and easily falls off from the thermoplastic film. Become.
[0027]
The antifouling decorative board of the present invention was obtained by applying a photocatalyst-containing composition to a core material, a resin-impregnated decorative paper, and, if necessary, a resin-impregnated surface paper, and a plastic film, and further applying a binder agent thereon. The transfer sheet is sequentially laminated, and is obtained by removing the transfer sheet after hot-press molding. When the transfer sheet is removed and then irradiated with ultraviolet rays, the photocatalytic decomposition performance is further improved.
[0028]
The light source for photo-exciting the photocatalyst layer of the antifouling decorative board of the present invention includes a fluorescent lamp, an incandescent lamp, a metal halide lamp, a mercury lamp, sunlight, and the like.
[0029]
Hereinafter, the present invention will be described in more detail based on examples.
【Example】
Example 1
Figure 2004284043
A photocatalyst-containing composition is applied to a matte polypropylene film having a transfer film thickness of 25 μm at a solid content of 4 g / m 2 at a solid content, and an organosilica sol (NPC-ST-30 Nissan Chemical Co., Ltd., solid content concentration 30% by weight) is further applied thereon. At a solid content of 4 g / m 2 to obtain a transfer film.
Melamine resin-impregnated decorative paper Impregnated decorative paper with a basis weight of 100 g / m 2 is impregnated with the above-mentioned melamine resin solution so that the impregnation amount becomes 100 g / m 2 in terms of solid content, and dried. I got the paper.
Phenol resin-impregnated paper A resol type phenol resin was obtained by making the molar ratio of phenol to formaldehyde 1: 1.15 under sodium hydroxide, and then the impregnation amount of kraft paper of 190 g / m 2 was calculated as a solid content. It was impregnated to 90 g / m 2 and dried to obtain a phenol resin impregnated paper.
Manufacture of antifouling decorative board Four phenolic resin-impregnated paper sheets, one melamine resin-impregnated decorative paper sheet, one melamine resin-impregnated surface paper sheet, and a transfer film coated with an organosilica sol were applied to the melamine resin impregnated surface paper sheet The layers were sequentially laminated so as to be in contact with each other, and a stainless steel plate was arranged thereon and subjected to hot-press molding under the conditions of a temperature of 170 ° C., a pressure of 50 kg / cm 2 , and a time of 100 minutes.
After the hot pressing, the transfer film was removed to obtain an antifouling decorative plate of Example 1.
[0030]
The surface of the antifouling decorative panel of Example 1 was irradiated with ultraviolet rays of 12 mW / cm 2 for 30 minutes to obtain the antifouling decorative panel of Example 2.
[0031]
Example 3
Melamine resin impregnated surface paper Melamine precondensate having a molar ratio of formaldehyde to melamine of 1.5, 6 parts of paratoluenesulfonic acid amide, 3 parts of curing agent (Catanit A manufactured by Nitto Riken Kogyo KK), and 1 parting agent (Separ 328, manufactured by Chukyo Yushi Co., Ltd.) was added to obtain a melamine resin solution. The surface paper having a basis weight of 22 g / m 2 was impregnated with the resin for impregnation at a solid content converted value of 55 g / m 2. To obtain a melamine resin-impregnated surface paper.
In Example 1, an antifouling decorative board of Example 3 was obtained in the same manner as in Example 1, except that the melamine resin-impregnated surface paper was disposed on the melamine resin-impregnated decorative paper.
[0032]
Table 1 shows the evaluation results.
[Table 1]
Figure 2004284043
[0033]
Evaluation method Photocatalytic decomposition function The antifouling decorative boards of Examples 1 and 2 were coated with a 500 ppm methylene blue solution, measured for Lab with a colorimeter, and exposed to 1 mW / cm 2 ultraviolet light using a 20 W black light as a light source. After exposure for 2 hours, Lab was measured to measure the color difference ΔE, and the decomposition rate (%) was calculated according to Equation 1.
In the same manner, exposure was performed for 4 hours, and the decomposition rate (%) was calculated.
(Equation 1)
Figure 2004284043
Here, L 0 , a 0 , and b 0 indicate the color of the test sample itself, L MB , a MB , and b MB indicate the colors after application of the methylene blue solution, and L uv , a uv , and b uv indicate the colors after light irradiation. , ΔE uv is the color difference between the light irradiation and the methylene blue solution application, and ΔE MB is the color difference between the methylene blue solution application and the test sample itself.
[0034]
【The invention's effect】
The antifouling decorative board of the present invention has a photocatalyst layer which is transferred onto the surface of the resin-impregnated paper at the same time as hot-press molding, and by using a binder agent, the adhesion with the photocatalyst layer is good and the photocatalytic decomposition performance can be improved over a long period of time. Can be maintained.
[Brief description of the drawings]
FIG. 1 is a schematic sectional view showing a method for producing an antifouling decorative board.
[Explanation of symbols]
REFERENCE SIGNS LIST 1 plastic film 2 photocatalyst containing layer 3 binder agent layer 4 transfer film 5 resin impregnated surface paper 6 resin impregnated decorative paper 7 resin impregnated core paper 9 antifouling decorative board

Claims (3)

コア材と、樹脂含浸化粧紙と、プラスチックフィルムに光触媒含有組成物が塗布され、更にこの上にバインダー剤が塗布された転写シートとが順次積層され、熱圧成形後、該転写シートが除去されてなることを特徴とする防汚性化粧板。A core material, a resin-impregnated decorative paper, and a photocatalyst-containing composition applied to a plastic film, and a transfer sheet coated with a binder agent are sequentially laminated thereon, and after the hot-press molding, the transfer sheet is removed. An antifouling decorative board characterized by comprising: 更に、該樹脂含浸化粧紙と該転写シートの間に樹脂含浸表面紙が介在されてなることを特徴とする請求項1記載の防汚性化粧板。2. The antifouling decorative board according to claim 1, further comprising a resin-impregnated surface paper interposed between the resin-impregnated decorative paper and the transfer sheet. 該転写シートが除去され、紫外線が照射されてなることを特徴とする請求項1又は2記載の防汚性化粧板。3. The antifouling decorative board according to claim 1, wherein the transfer sheet is removed and the sheet is irradiated with ultraviolet rays.
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JP2021120220A (en) * 2017-07-31 2021-08-19 イビデン株式会社 Antiviral decorative plate and method for manufacturing antiviral decorative plate

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2021120220A (en) * 2017-07-31 2021-08-19 イビデン株式会社 Antiviral decorative plate and method for manufacturing antiviral decorative plate
JP7169399B2 (en) 2017-07-31 2022-11-10 イビデン株式会社 Antiviral decorative sheet and method for producing antiviral decorative sheet

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