JP2005023531A - Decorative sheet for internal facing and its manufacturing method - Google Patents

Decorative sheet for internal facing and its manufacturing method Download PDF

Info

Publication number
JP2005023531A
JP2005023531A JP2003187019A JP2003187019A JP2005023531A JP 2005023531 A JP2005023531 A JP 2005023531A JP 2003187019 A JP2003187019 A JP 2003187019A JP 2003187019 A JP2003187019 A JP 2003187019A JP 2005023531 A JP2005023531 A JP 2005023531A
Authority
JP
Japan
Prior art keywords
silica gel
decorative board
base material
type silica
press
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP2003187019A
Other languages
Japanese (ja)
Other versions
JP4143486B2 (en
Inventor
Nobuo Kawabe
伸夫 川邊
Kazuhiko Mitsui
一彦 三井
Tomonori Sato
友紀 佐藤
Katsumune Nagai
克宗 永井
Tomoyuki Iriyama
朋之 入山
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Daiken Trade and Industry Co Ltd
Original Assignee
Daiken Trade and Industry Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Daiken Trade and Industry Co Ltd filed Critical Daiken Trade and Industry Co Ltd
Priority to JP2003187019A priority Critical patent/JP4143486B2/en
Publication of JP2005023531A publication Critical patent/JP2005023531A/en
Application granted granted Critical
Publication of JP4143486B2 publication Critical patent/JP4143486B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Images

Landscapes

  • Dry Formation Of Fiberboard And The Like (AREA)
  • Finishing Walls (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fiberboard superior in humidity conditioning/adsorptive performance, by efficiently realizing a high specific gravity by a secondary press, by restraining the occurrence of a puncture by gas such as steam, when secondarily pressing a base material. <P>SOLUTION: This manufacturing method is characterized by instantly adsorbing the gas generated by B type silica gel, by adding the B type silica gel to the base material before the secondary press. The base material molded by flattening and dehydrating slurry of dispersing a fiber material, an inorganic filler, a binding material, and the B type silica gel in water; is provided as a decorative sheet for internal facing. This decorative sheet is characterized by being molded by processing this material by a hot press. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

【0001】
【発明の属する技術分野】
本発明は、繊維材料からなる内装用化粧板及びその製造方法に関する技術分野に属する。
【0002】
【従来の技術】
一般に、鉱物質繊維や木質繊維を結合材(バインダー)と共に湿式抄造して成板した繊維板は、乾式で製造された繊維板よりも軽量でかつ低比重であることから、吸音性や断熱性に優れており、この繊維板は、従来より、主に天井板や内装下地材として広く用いられてきた。
【0003】
また、これらの繊維板は多孔質であることから、近年、その優れた吸着性能、調湿性能等がシックハウス症候群を予防する材料として注目を集めている。
【0004】
例えば、畳芯材料に脱臭機能や調湿機能を持たせるため、木質繊維を抄造してなる木質繊維板にゼオライト分散液を塗布、乾燥させたものが提案されている(例えば特許文献1参照)。
【0005】
しかし、上記提案のものはあくまで畳芯用であるため、比重が0.1〜0.4で厚みは5mm以上あり、曲げ強度や表面硬さが不足して、内装仕上げ材としては不適切なものである。
【0006】
このように、抄造法により成板される繊維板の場合は、低比重であることから、逆に表面硬度が低くて曲げ強度も小さいため、内装の表面材としては天井材以外には使い難いのが現状である。
【0007】
【特許文献1】
特開2001―179717号公報
【0008】
【発明が解決しようとする課題】
そこで、上記湿式抄造により成板(1次プレス)された繊維板に対しさらに熱圧プレス処理する2次プレスを行うことによって比重を上げ、硬度や強度を向上させることが試みられている。
【0009】
しかし、このように湿式抄造により成板された繊維板を熱圧して2次プレスする場合、その2次プレス時に発生する水蒸気等のガスでパンクが生じ易くなるのは避けられない。このため、プレス前に乾燥させて含水率を低くしておいたり、プレス条件を低温・長時間にしたりする必要があり、生産効率が悪くなるという問題がある。
【0010】
本発明は斯かる点に鑑みてなされたもので、その目的は、湿式抄造により成板された繊維板を2次プレスする際にガスによりパンクの発生を抑制できるようにすることで、その繊維板を効率よく高比重化、高強度化、高硬度化し、かつその調湿・吸着性能をも向上させるようにすることにある。
【0011】
【課題を解決するための手段】
上記の目的の達成のため、この発明では、2次プレス前の基材にB型シリカゲルを添加しておくことで、そのB型シリカゲルにより、プレス時に発生するガスを瞬時に吸着させるようにした。
【0012】
具体的には、請求項1の発明では、内装用化粧板として、繊維材料、無機充填材、結合材及びB型シリカゲルが水に分散されたスラリーを抄造、脱水、成形してなる基材を備え、この材が熱圧プレス処理されて成形されていることを特徴とする。
【0013】
上記の構成によると、湿式抄造により成形(1次プレス)された基材(繊維板)にB型シリカゲルが添加されているので、その基材を2次プレスする際に発生する水蒸気等のガスは、上記添加されているB型シリカゲルによりスムーズに吸着される。このことで、湿式抄造により成板された基材であっても、そのパンク発生を抑制でき、その基材により内装用化粧板を生産することができる。
【0014】
また、プレス前の基材(繊維板)の含水率が高いままで2次プレスをしてもパンクを生じないことから、そのプレス前の前乾燥を簡略化することができ、2次プレスを高圧力化することもでき、化粧板の生産効率を上げることができる。
【0015】
そして、上記2次プレスのスムーズな実行によって、化粧板の比重を増大させて化粧板を高比重化することができ、曲げ強度や表面硬度を優れたものとし、その加工性も良くすることができ、化粧板の壁材や床材、家具の表面材等への適用が可能となる。
【0016】
さらに、化粧板中にB型シリカゲルが含まれるので、このB型シリカゲルの吸放湿性、吸着性により従来の繊維板よりもさらに調湿性能・吸着性を高めることができる。
【0017】
上記シリカゲルとしてはA型及びB型があるが、本発明ではB型に限定される。A型のシリカゲルは、吸湿しても加熱処理しないと放湿しないのに対し、B型のものは、常温で吸放湿(呼吸)する。尚、シリカゲル以外の他の無機系吸放湿材料では吸放湿容量が小さいために、使用できない。
【0018】
請求項2の発明では、上記スラリーに塩化カルシウムが添加されていることを特徴とする。こうして、塩化カルシウムを添加することで、化粧板の調湿性能がさらに向上する。
【0019】
請求項3及び4の発明は内装用化粧板の製造方法に関するものであり、請求項3の発明では、繊維材料、無機充填材、結合材及びB型シリカゲルを水に分散かつ混練してスラリーを生成する工程と、そのスラリーを抄造、脱水、成形して基材を形成する工程と、この基材を熱圧プレス処理する工程とを有すること特徴とする。このことで、上記請求項1の発明と同様の作用効果を奏する化粧板が容易に得られる。
【0020】
請求項4の発明では、上記スラリーを生成する工程で該スラリーに塩化カルシウムを添加することを特徴とする。このことで、上記請求項2の発明と同様の作用効果を奏することができる。
【0021】
【発明の実施の形態】
以下、本発明の実施形態を図面に基づいて詳細に説明する。以下の好ましい実施形態の説明は、本質的に例示に過ぎず、本発明、その適用物或いはその用途を制限することを意図するものでは全くない。
【0022】
(内装用化粧板の構成)
図1は本発明の実施形態1に係る内装用化粧板1を示し、この化粧板1は、繊維材料、無機充填材、結合材(バインダー)、及び、吸放湿材料としてのB型シリカゲルが水に分散されたスラリーを抄造、脱水、成形してなる基材を備え、この基材が熱圧プレス処理されて成形された繊維板からなる。
【0023】
上記繊維材料としては、例えばロックウール、スラグウール等の鉱物質繊維や、木材チップを蒸煮・解繊してなる木質繊維を用いることができる。化粧板1の曲げ強度を増すために、少量の化学繊維(例えばポリエステル等)や故紙パルプを添加してもよい。
【0024】
また、上記無機充填材とは、繊維板の表面硬さを向上させるために添加されるものであり、例えばパーライト、ベントナイト、セピオライト、アタパルジャイト、バーミキュライト、炭酸カルシウム、水酸化アルミニウム、シラスバルーン、シリカ、クレー等を用いることができる。
【0025】
さらに、上記結合材としては、例えば澱粉、ポリビニルアルコール、フェノール、メラミン、アクリル樹脂、酢酸ビニル樹脂、イソシアネート類等を単独又は混合して使用することができる。特に、環境上又はコスト面から澱粉が好適である。
【0026】
上記スラリーに塩化カルシウムを添加することによって、この塩化カルシウムがB型シリカゲルに浸透・担持されて吸放湿性能がさらに向上する。尚、この塩化カルシウムは予めB型シリカゲルに担持させておいてもよい。
【0027】
上記B型シリカゲルは例えば粉末状のもので、その粒子径は20メッシュ以下が好ましい。粒子径が大きいと重量当たりの表面積が小さくなり、吸着や調湿の効率が悪くなるからである。また、化粧板1の表面の平滑性の面からも粒径が小さい方がよい。
【0028】
(内装用化粧板の製造方法)
そして、内装用化粧板1を製造する場合、まず、上記繊維材料、無機充填材、結合材及びB型シリカゲルの各材料を水に分散させてスラリーを生成し、通常の繊維板の製造方法である湿式抄造にて成板する。
【0029】
次いで、上記成板を減圧脱水してプレス成形(1次プレス)し、乾燥させたものをサンディングで厚さを調整して基材とする。
【0030】
尚、上記基材に対し必要に応じて下塗り塗装及び水打ちをしたものをプレス前原板とすることもできる。下塗り塗料としては例えば酢酸ビニル系樹脂塗料等が好適である。さらに、基材表面に、酢酸ビニル系樹脂塗料やアクリル樹脂系塗料等で上塗り塗装を行うこともできる。前処理を樹脂液等で行う場合には、下塗り塗装等は省略することができる。これらの処理はいずれも2次プレス(熱圧プレス)後の表面平滑性を向上させるためである。
【0031】
その後、例えば190〜400℃、10〜180秒のプレス条件で熱圧プレスにより2次プレスして、目的の内装用化粧板1が得られる。その後、必要に応じて塗装、シート状物の積層、切削等の装飾を施すことができる。そのとき、塗装の塗膜やシート状物は透湿性を有する必要がある。
【0032】
したがって、この実施形態においては、湿式抄造により成形された基材にB型シリカゲルが添加されているので、その基材を2次プレスする際に発生するガス(水蒸気等)は、上記添加されているB型シリカゲルにより吸着され、よってパンクを生じることなく内装用化粧板1を生産することができる。
【0033】
また、プレス前の基材の含水率が高いままで2次プレスをしてもパンクを生じないことから、そのプレス前の前乾燥を簡略化することができるとともに、2次プレスを高圧力化することもでき、化粧板の生産効率を高めることができる。
【0034】
そして、上記2次プレスの実行によって、化粧板1の比重を例えば0.4〜1.4(従来は比重0.2〜0.3)にして化粧板1を高比重化でき、化粧板1の曲げ強度や表面硬度を優れたものとし、その加工性も良くすることができ、壁材や床材、家具の表面材等への適用が可能となる化粧板1が得られる。
【0035】
さらに、化粧板1中にB型シリカゲルが含まれるので、従来の繊維板よりもさらに調湿性能・吸着性を高めることができる。
【0036】
また、上記スラリーに塩化カルシウムが添加されているので、さらに調湿性能が向上する。
【0037】
尚、上記実施形態は、単層の内装用化粧板1について説明しているが、この他、上記と同様にして湿式抄造により複数枚の湿潤マットを作製し、これらマットを重ね合わせて積層状態の基材とし、その基材を熱圧プレス処理して内装用化粧板を成形するようにしてもよく、その場合も上記実施形態と同様の作用効果が得られる。
【0038】
【実施例】
次に、具体的に実施した実施例について説明する。
【0039】
(試験例1)
(1) 試験片
実施例1は、繊維材料(主成分)としてのロックウール及び故紙パルプと、無機充填材としてのパーライト、ベントナイトと、バインダーとしての澱粉と、吸放湿材料としてのB型シリカゲルとの材料を水に均一に分散混練してスラリーとし、通常の鉱物質繊維板の製造方法である湿式抄造にて成板し、減圧脱水してプレス成形し、さらに乾燥したものを基材とした。
【0040】
比較例1及び2は、上記実施例からB型シリカゲルを省き、その分、繊維材料としてのロックウールの比率を増加させたものを基材としている。
【0041】
上記実施例及び比較例1の基材を12mm厚さにサンディングし、下塗塗料を塗布してプレス前原板(基材)を得た。そして、このプレス前原板を水打ちして250℃にてHOT&HOT(熱圧プレス)にて2次プレスすることで、繊維板からなる試験片が得られた。そのときのプレス時間は15秒間で、クリアランスは9mm及び7mmとした。
【0042】
比較例2は、上記2次プレスを行わないものである。
【0043】
以上の実施例1及び比較例1,2の組成及び2次プレスの有無を表1に示す。
【0044】
【表1】

Figure 2005023531
【0045】
(2) 物性評価
このようにして得られた試験片につき、曲げ強度、密度(比重)、硬度及び含水率について測定した。曲げ強度はJISA5905に従って測定した。
【0046】
一方、硬度については図2に示すような硬度測定試験装置を用いて測定した。すなわち、この試験においては、載置台10上に測定しようとする繊維板からなる試験片11を3枚重ねて載置し、その上面に先端部(下端部)が円弧面とされた治具12の該先端部を5mm/minの速度で押し付けて荷重を加え、その治具12の先端部が試験片11(繊維板)の表面から5mm深さまで凹んだときの最大荷重を測定した。これらの結果を表2に示す。
【0047】
【表2】
Figure 2005023531
【0048】
また、図3に示すように、石膏ボード15上に1枚の試験片11(繊維板)を載置して、その上の所定高さh(h=200〜1500mm)から130gの鋼球16を試験片11表面に落下させ、それに伴い試験片11表面にできた凹部の深さを測定した。その結果を表3に示す。
【0049】
【表3】
Figure 2005023531
【0050】
これらの結果を見ると、250℃で15秒で2次プレスしたとき、実施例1では所定の厚さとすることができたが、比較例1ではややプレス不足である。
【0051】
また、物性のうちの曲げ強度については、2次プレスを行った実施例1及び比較例1が比較例2よりも向上している。また、硬度についても同様にプレス品は向上している。さらに、鋼球落下試験についても、実施例1及び比較例1の方が比較例2に比べて向上している。従って、壁材としての物性は満足していることが判る。
【0052】
(3) 吸放湿性能評価
試験片(繊維板)の木口及び裏面をアルミテープにてマスキングし、25℃50%RHの条件下で24時間以上養生した。その養生後、雰囲気を25℃90%RHの増湿状態とし、24時間の経過後に再び25℃50%RHに戻し、試験片の吸放湿量を重量変化により測定した。その結果を図4に示す。
【0053】
この図4の結果から、繊維板中にB型シリカゲルを含む実施例1は、それを含まない比較例1,2に比べて、調湿性能が向上していることが判る。
【0054】
(試験例2)
上記試験例1の実施例1及び比較例1において、それぞれ繊維材料(主成分)としてのロックウールを木質繊維に変更するとともに、無機充填材を除いたインシュレーションボード(IB)を実施例2及び比較例3とした。これら実施例2及び比較例3に対し、試験例1と同様の吸放湿性能評価を測定したところ、図5に示す結果が得られた。この図5により、インシュレーションボードを主成分とする繊維板中にB型シリカゲルを含むことで、調湿性能・吸着性がさらに向上している。
【0055】
(試験例3)
(1) 試験片
実施例3は、繊維材料(主成分)としてのロックウールと、無機充填材としての水酸化アルミニウムと、バインダーとしての粉末フェノール・スターチと、吸放湿材料としてのB型シリカゲルとの材料を水中で攪拌し、凝集剤を添加して凝集させた後、抄造して2枚の湿潤マットを作製し、これらマットを重ね合わせて積層状態の基材とした。
【0056】
比較例4〜6は、上記実施例3から吸放湿材料としてのB型シリカゲルを省き、その分、無機充填材としての水酸化アルミニウムの成分比を増加させたものを基材としている。
【0057】
上記実施例3及び比較例4〜6の基材を5mmのディスタンスバーを介して90℃の熱圧プレスで90秒間、熱圧締する1次プレスを行った後、150℃のドライヤーで5分間乾燥した。次いで、3.3mmのディスタンスバーを介して200℃の熱圧プレスで3分間、2次プレスし、厚さ3.3mmの2層構造の無機質板を得、これを試験片とした。尚、比較例4については上記2次プレスを行わないものとした。以上の実施例3及び比較例4〜6の組成及びプレス条件を表4に示す。
【0058】
【表4】
Figure 2005023531
【0059】
(2) 物性評価
このようにして得られた試験片(繊維板)のうちの実施例及び比較例1,2につき、素板の表面平滑性、比重、曲げ強度、ショア硬度及びスプリングバックの有無について測定した。素板の表面平滑性及びスプリングバックの有無は目視で検査し、曲げ強度は試験例1と同様にJISA5905に従って、またショア硬度はJISZ2246に従ってそれぞれ測定した。これらの結果を表5に示す。
【0060】
【表5】
Figure 2005023531
【0061】
(3) 吸放湿性能評価
実施例3及び比較例4,5の木口及び裏面をアルミテープにてマスキングし、25℃50%RHの条件下で24時間以上養生した。その養生後、雰囲気を25℃90%RHの増湿状態とし、24時間の経過後に再び25℃50%RHに戻し、試片の吸放湿量を重量変化により測定した。その結果を図6に示す。
【0062】
また、40℃15%RHの条件で24時間放置し、その後に30℃90%RHの条件で48時間放置したときの吸湿長さ変化率と、逆に、30℃90%RHの条件で48時間放置した後に40℃15%RHの条件で24時間放置したときの放湿長さ変化率とを測定したところ、表6に示す結果が得られた。
【0063】
【表6】
Figure 2005023531
【0064】
上記表5、表6及び図6の結果を見ると、比較例6では乾燥時間が短くて基材の含水率が高いので、2次プレス時にパンクを招き、成板が不可能であった。また、比較例4ではプレス時のスプリングバックが生じている。さらに、曲げ強度及びショア硬度についてみると、実施例3及び比較例5が比較例4よりも優れている。また、吸放湿による寸法変化は実施例3が比較例4,5よりも優れている。
【0065】
よって、この試験例2においても、繊維板中にB型シリカゲルを含む実施例3は、それを含まない比較例4,5に比べて、調湿性能が向上していることが裏付けられた。
【0066】
【発明の効果】
以上説明したように、請求項1又は3の発明によると、繊維材料、無機充填材及び結合材を水に分散したスラリーを抄造、脱水、成形して基材を形成し、この基材を熱圧プレスで2次プレス処理して内装用化粧板を成形する場合において、その基材にB型シリカゲルを添加したことにより、2次プレス時に発生する水蒸気等のガスを吸着させてパンクを生じさせずに効率よく内装用化粧板を生産でき、基材の2次プレス前の乾燥の簡略化及び2次プレスの高圧力化を図ることができるとともに、2次プレスによって化粧板を高比重化でき、よって、曲げ強度や表面硬度に優れ、加工性も良くて壁材や床材、家具の表面材等への適用が可能な内装用化粧板が有効に得られる。また、内装用化粧板中に含まれるB型シリカゲルにより、従来の繊維板よりもさらに調湿性能・吸着性の向上を図ることができる。
【0067】
請求項2又は4の発明によれば、スラリーに塩化カルシウムを添加したことにより、化粧板のより一層の調湿性能の向上を図ることができる。
【図面の簡単な説明】
【図1】本発明の実施形態に係る内装用化粧板の断面図である。
【図2】硬度測定試験装置を概略的に示す図である。
【図3】鋼球落下試験装置を概略的に示す図である。
【図4】試験例1における吸放湿特性を示す図である。
【図5】試験例2における吸放湿特性を示す図である。
【図6】試験例3における吸放湿特性を示す図である。
【符号の説明】
1 内装用化粧板[0001]
BACKGROUND OF THE INVENTION
The present invention belongs to a technical field relating to an interior decorative board made of a fiber material and a method for producing the same.
[0002]
[Prior art]
In general, fiberboard made by wet-making mineral fiber and wood fiber together with a binder (binder) is lighter and has a lower specific gravity than fiberboard manufactured by dry process. Conventionally, this fiberboard has been widely used mainly as a ceiling board or an interior base material.
[0003]
In addition, since these fiberboards are porous, their excellent adsorption performance, humidity control performance, and the like have recently attracted attention as materials for preventing sick house syndrome.
[0004]
For example, in order to give a tatami core material a deodorizing function and a humidity control function, a material obtained by applying a zeolite dispersion liquid to a wood fiber board obtained by making wood fiber and drying it has been proposed (for example, see Patent Document 1). .
[0005]
However, since the above proposal is only for tatami cores, the specific gravity is 0.1 to 0.4, the thickness is 5 mm or more, the bending strength and surface hardness are insufficient, and it is inappropriate as an interior finishing material. Is.
[0006]
In this way, in the case of fiberboard made by the papermaking method, since it has a low specific gravity, the surface hardness is low and the bending strength is low, so it is difficult to use the interior surface material other than the ceiling material. is the current situation.
[0007]
[Patent Document 1]
Japanese Patent Laid-Open No. 2001-179717
[Problems to be solved by the invention]
Therefore, attempts have been made to increase the specific gravity and improve the hardness and strength by performing a secondary press that further performs hot-press pressing on the fiberboard formed by the wet papermaking (primary press).
[0009]
However, when the fiberboard formed by wet papermaking is hot-pressed and subjected to secondary pressing, it is inevitable that puncture is likely to occur with a gas such as water vapor generated during the secondary pressing. For this reason, it is necessary to dry before pressing to lower the moisture content, or to set the pressing conditions at a low temperature and for a long time, and there is a problem that the production efficiency deteriorates.
[0010]
The present invention has been made in view of such a point, and the object thereof is to make it possible to suppress the occurrence of puncture by gas when the fiber board formed by wet papermaking is secondarily pressed. The purpose is to efficiently increase the specific gravity, strength, and hardness of the plate and to improve the humidity control and adsorption performance.
[0011]
[Means for Solving the Problems]
In order to achieve the above object, in the present invention, B-type silica gel is added to the base material before the secondary press so that the gas generated during pressing is instantaneously adsorbed by the B-type silica gel. .
[0012]
Specifically, in the invention of claim 1, as a decorative board for interior, a base material formed by papermaking, dehydrating and molding a slurry in which a fiber material, an inorganic filler, a binder, and B-type silica gel are dispersed in water. It is characterized in that this material is molded by hot-pressing.
[0013]
According to the above configuration, since B-type silica gel is added to the base material (fiberboard) formed by wet papermaking (primary press), gas such as water vapor generated when the base material is secondarily pressed Is smoothly adsorbed by the added B-type silica gel. Thereby, even if it is the base material formed by wet papermaking, the generation | occurrence | production of the puncture can be suppressed and the interior decorative board can be produced with the base material.
[0014]
Also, since the moisture content of the base material (fiberboard) before pressing remains high and no secondary puncture occurs, pre-drying before pressing can be simplified, and the secondary press can be simplified. The pressure can be increased, and the production efficiency of the decorative board can be increased.
[0015]
The smooth execution of the secondary press can increase the specific gravity of the decorative plate to increase the specific gravity of the decorative plate, and can improve the bending strength and surface hardness, and also improve the workability. It can be applied to wall materials and floor materials for decorative boards, surface materials for furniture, and the like.
[0016]
Furthermore, since B-type silica gel is contained in the decorative board, the moisture-adjusting performance and adsorptivity can be further improved as compared with the conventional fiber board due to the hygroscopic and adsorptive properties of the B-type silica gel.
[0017]
The silica gel includes A type and B type, but is limited to B type in the present invention. The A-type silica gel does not release moisture unless it is heat-treated even if it absorbs moisture, whereas the B-type absorbs and releases (breaths) at room temperature. It should be noted that inorganic moisture absorbing / releasing materials other than silica gel cannot be used because of their small moisture absorbing / releasing capacity.
[0018]
The invention of claim 2 is characterized in that calcium chloride is added to the slurry. Thus, the humidity control performance of the decorative board is further improved by adding calcium chloride.
[0019]
The inventions of claims 3 and 4 relate to a method for producing an interior decorative board. In the invention of claim 3, a slurry is obtained by dispersing and kneading a fiber material, an inorganic filler, a binder and B-type silica gel in water. It has the process of producing | generating, The process which forms the base material by papermaking, spin-drying | dehydrating, and shaping | molding the slurry, and the process of carrying out the hot-pressing process of this base material. Thus, a decorative board having the same effect as that of the first aspect of the invention can be easily obtained.
[0020]
The invention of claim 4 is characterized in that calcium chloride is added to the slurry in the step of producing the slurry. Thus, the same effect as that attained by the 2nd aspect can be attained.
[0021]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The following description of the preferred embodiments is merely exemplary in nature and is in no way intended to limit the invention, its application, or its application.
[0022]
(Configuration of interior decorative panel)
FIG. 1 shows an interior decorative board 1 according to Embodiment 1 of the present invention. This decorative board 1 is composed of a fiber material, an inorganic filler, a binder (binder), and B-type silica gel as a moisture absorbing / releasing material. It comprises a base material formed by papermaking, dewatering and molding a slurry dispersed in water, and this base material is made of a fiberboard formed by hot-pressing.
[0023]
Examples of the fiber material include mineral fibers such as rock wool and slag wool, and wood fibers obtained by steaming and defibrating wood chips. In order to increase the bending strength of the decorative board 1, a small amount of chemical fiber (for example, polyester) or waste paper pulp may be added.
[0024]
The inorganic filler is added to improve the surface hardness of the fiberboard, such as perlite, bentonite, sepiolite, attapulgite, vermiculite, calcium carbonate, aluminum hydroxide, shirasu balloon, silica, Clay or the like can be used.
[0025]
Furthermore, as the binder, for example, starch, polyvinyl alcohol, phenol, melamine, acrylic resin, vinyl acetate resin, isocyanates and the like can be used alone or in combination. In particular, starch is preferable from the viewpoint of environment or cost.
[0026]
By adding calcium chloride to the slurry, the calcium chloride is infiltrated and supported on the B-type silica gel, and the moisture absorption / release performance is further improved. The calcium chloride may be supported on B-type silica gel in advance.
[0027]
The B-type silica gel is, for example, in a powder form, and the particle diameter is preferably 20 mesh or less. This is because if the particle size is large, the surface area per weight becomes small, and the efficiency of adsorption and humidity adjustment becomes worse. Further, it is preferable that the particle size is small also from the surface smoothness of the decorative board 1.
[0028]
(Manufacturing method of decorative board for interior)
And when manufacturing the decorative board 1 for interior, first, each material of the said fiber material, an inorganic filler, a binder, and B-type silica gel is disperse | distributed to water, a slurry is produced | generated, By the manufacturing method of a normal fiberboard Laminate with some wet papermaking.
[0029]
Next, the above-mentioned laminated plate is dehydrated under reduced pressure, press-molded (primary press), and the dried product is adjusted to a thickness by sanding to obtain a substrate.
[0030]
In addition, what pre-coated and water-washed with respect to the said base material as needed can also be used as a pre-press original plate. As the undercoat paint, for example, a vinyl acetate resin paint is suitable. Furthermore, it is possible to perform a top coating on the surface of the base material with a vinyl acetate resin paint or an acrylic resin paint. In the case where the pretreatment is performed with a resin solution or the like, undercoating or the like can be omitted. These treatments are for improving the surface smoothness after the secondary press (hot press).
[0031]
After that, secondary pressing is performed by hot pressing under a press condition of 190 to 400 ° C. for 10 to 180 seconds, for example, so that a desired interior decorative board 1 is obtained. Thereafter, decoration such as painting, lamination of sheet-like materials, and cutting can be performed as necessary. At that time, the coating film or sheet-like material for coating needs to have moisture permeability.
[0032]
Therefore, in this embodiment, since the B-type silica gel is added to the base material formed by wet papermaking, the gas (such as water vapor) generated when the base material is secondarily pressed is added as described above. The interior decorative board 1 can be produced without being punctured by being adsorbed by the B-type silica gel.
[0033]
Moreover, since the puncture does not occur even if the secondary press is performed while the moisture content of the base material before the press is high, the pre-drying before the press can be simplified and the pressure of the secondary press is increased. It is possible to increase the production efficiency of the decorative board.
[0034]
Then, by executing the secondary press, the decorative board 1 can be made to have a specific gravity of, for example, 0.4 to 1.4 (conventional gravity of 0.2 to 0.3), and the decorative board 1 can be made to have a high specific gravity. The decorative board 1 can be obtained which has excellent bending strength and surface hardness, can be improved in workability, and can be applied to wall materials, floor materials, furniture surface materials, and the like.
[0035]
Furthermore, since B type silica gel is contained in the decorative board 1, humidity control performance and adsorptivity can be improved more than the conventional fiber board.
[0036]
Further, since calcium chloride is added to the slurry, the humidity control performance is further improved.
[0037]
In addition, although the said embodiment demonstrated the single-layer interior decorative board 1, other than this, several wet mats are produced by wet papermaking like the above, and these mats are laminated | stacked and laminated | stacked The interior decorative plate may be formed by subjecting the substrate to hot-press pressing, and in this case, the same effects as those of the above embodiment can be obtained.
[0038]
【Example】
Next, specific examples will be described.
[0039]
(Test Example 1)
(1) Test piece Example 1 is rock wool and waste paper pulp as a fiber material (main component), pearlite and bentonite as inorganic fillers, starch as a binder, and B-type silica gel as a moisture absorbing / releasing material The material is uniformly dispersed and kneaded in water to form a slurry, which is formed by wet papermaking, which is a normal manufacturing method of mineral fiberboard, dehydrated under reduced pressure, press-molded, and further dried as a base material. did.
[0040]
In Comparative Examples 1 and 2, B-type silica gel is omitted from the above examples, and the amount of rock wool as the fiber material is increased accordingly.
[0041]
The base materials of Examples and Comparative Example 1 were sanded to a thickness of 12 mm, and an undercoat was applied to obtain a pre-press original plate (base material). And the test piece which consists of a fiber board was obtained by water-washing this pre-press original plate, and performing secondary press by HOT & HOT (hot press) at 250 degreeC. The pressing time at that time was 15 seconds, and the clearances were 9 mm and 7 mm.
[0042]
In Comparative Example 2, the secondary press is not performed.
[0043]
Table 1 shows the compositions of Example 1 and Comparative Examples 1 and 2 and the presence or absence of the secondary press.
[0044]
[Table 1]
Figure 2005023531
[0045]
(2) Physical property evaluation About the test piece obtained in this way, bending strength, density (specific gravity), hardness, and moisture content were measured. The bending strength was measured according to JISA5905.
[0046]
On the other hand, the hardness was measured using a hardness measurement test apparatus as shown in FIG. That is, in this test, three test pieces 11 made of fiberboard to be measured are placed on the mounting table 10 and stacked, and a jig 12 whose tip (lower end) is an arc surface on the upper surface thereof. The tip was pressed at a speed of 5 mm / min to apply a load, and the maximum load when the tip of the jig 12 was recessed from the surface of the test piece 11 (fiber board) to a depth of 5 mm was measured. These results are shown in Table 2.
[0047]
[Table 2]
Figure 2005023531
[0048]
Also, as shown in FIG. 3, a single test piece 11 (fiberboard) is placed on a gypsum board 15, and a steel ball 16 of 130 g from a predetermined height h (h = 200 to 1500 mm) thereon. Was dropped on the surface of the test piece 11 and the depth of the concave portion formed on the surface of the test piece 11 was measured. The results are shown in Table 3.
[0049]
[Table 3]
Figure 2005023531
[0050]
From these results, when the secondary pressing was performed at 250 ° C. for 15 seconds, the predetermined thickness could be achieved in Example 1, but the press in Comparative Example 1 was slightly insufficient.
[0051]
Moreover, about the bending strength of physical properties, Example 1 and Comparative Example 1 in which the secondary press was performed are improved as compared with Comparative Example 2. Similarly, the press products have improved hardness. Furthermore, also about the steel ball drop test, Example 1 and Comparative Example 1 are improved compared to Comparative Example 2. Therefore, it turns out that the physical property as a wall material is satisfied.
[0052]
(3) Moisture absorption / release performance evaluation test piece (fiberboard) The mouth and back of the test piece (fiberboard) were masked with aluminum tape, and cured under conditions of 25 ° C. and 50% RH for 24 hours or more. After the curing, the atmosphere was brought to a humidified state of 25 ° C. and 90% RH, and after 24 hours, the atmosphere was returned again to 25 ° C. and 50% RH, and the moisture absorption / release amount of the test piece was measured by weight change. The result is shown in FIG.
[0053]
From the results of FIG. 4, it can be seen that Example 1 containing B-type silica gel in the fiberboard has improved humidity control performance compared to Comparative Examples 1 and 2 that do not contain it.
[0054]
(Test Example 2)
In Example 1 and Comparative Example 1 of Test Example 1 above, the rock wool as the fiber material (main component) was changed to wood fiber, and the insulation board (IB) from which the inorganic filler was removed was used in Example 2 and It was set as Comparative Example 3. When the same moisture absorption / release performance evaluation as in Test Example 1 was measured for Example 2 and Comparative Example 3, the results shown in FIG. 5 were obtained. According to FIG. 5, the humidity control performance and the adsorptivity are further improved by including the B-type silica gel in the fiber board mainly composed of the insulation board.
[0055]
(Test Example 3)
(1) Test piece Example 3 is a rock wool as a fiber material (main component), aluminum hydroxide as an inorganic filler, powdered phenol starch as a binder, and B-type silica gel as a moisture absorbing / releasing material. The materials were stirred in water, and a flocculant was added to agglomerate, and papermaking was then carried out to produce two wet mats. These mats were superposed to form a laminated substrate.
[0056]
In Comparative Examples 4 to 6, B-type silica gel as a moisture absorbing / releasing material was omitted from Example 3 above, and the component ratio of aluminum hydroxide as an inorganic filler was increased accordingly.
[0057]
After performing the primary press which heat-presses the base material of the said Example 3 and the comparative examples 4-6 through a 5 mm distance bar with a 90 degreeC hot press for 90 seconds, it is 5 minutes with a 150 degreeC dryer. Dried. Next, secondary pressing was performed for 3 minutes with a hot press at 200 ° C. through a 3.3 mm distance bar to obtain an inorganic plate with a thickness of 3.3 mm, which was used as a test piece. In Comparative Example 4, the secondary press was not performed. Table 4 shows the compositions and press conditions of Example 3 and Comparative Examples 4 to 6 described above.
[0058]
[Table 4]
Figure 2005023531
[0059]
(2) Evaluation of physical properties The surface smoothness, specific gravity, bending strength, Shore hardness, and presence / absence of springback of the base plate for Examples and Comparative Examples 1 and 2 of the test pieces (fiberboard) thus obtained. Was measured. The surface smoothness of the base plate and the presence or absence of spring back were visually inspected, and the bending strength was measured in accordance with JIS A5905 as in Test Example 1, and the shore hardness was measured in accordance with JIS Z 2246. These results are shown in Table 5.
[0060]
[Table 5]
Figure 2005023531
[0061]
(3) Moisture absorption / release performance evaluation Example 3 and Comparative Examples 4 and 5 were masked with aluminum tape on the mouth and back, and cured under conditions of 25 ° C. and 50% RH for 24 hours or more. After the curing, the atmosphere was changed to a humidified state of 25 ° C. and 90% RH, and after 24 hours, the atmosphere was returned to 25 ° C. and 50% RH again. The result is shown in FIG.
[0062]
Further, the moisture absorption length change rate when left at 40 ° C. and 15% RH for 24 hours and then left at 30 ° C. and 90% RH for 48 hours, and conversely, at 30 ° C. and 90% RH, 48 When the moisture release length change rate after being allowed to stand for 24 hours at 40 ° C. and 15% RH was measured, the results shown in Table 6 were obtained.
[0063]
[Table 6]
Figure 2005023531
[0064]
From the results shown in Tables 5 and 6 and FIG. 6, in Comparative Example 6, the drying time was short and the moisture content of the base material was high. Moreover, in the comparative example 4, the springback at the time of a press has arisen. Furthermore, in terms of bending strength and Shore hardness, Example 3 and Comparative Example 5 are superior to Comparative Example 4. Moreover, the dimensional change by moisture absorption / release is more excellent in Example 3 than in Comparative Examples 4 and 5.
[0065]
Therefore, also in Test Example 2, it was confirmed that Example 3 containing B-type silica gel in the fiberboard had improved humidity control performance as compared with Comparative Examples 4 and 5 not containing it.
[0066]
【The invention's effect】
As described above, according to the invention of claim 1 or 3, a base material is formed by papermaking, dehydrating and molding a slurry in which a fiber material, an inorganic filler and a binder are dispersed in water. In the case of molding a decorative board for interior by performing a secondary press treatment with a pressure press, by adding B type silica gel to the base material, gas such as water vapor generated during the secondary press is adsorbed to cause puncture. The decorative board for interior can be produced efficiently, the drying of the base material before the secondary press can be simplified and the pressure of the secondary press can be increased, and the decorative pressure can be increased by the secondary press. Therefore, an interior decorative board that is excellent in bending strength and surface hardness, has good workability, and can be applied to wall materials, floor materials, furniture surface materials, and the like is effectively obtained. Further, with the B-type silica gel contained in the interior decorative board, it is possible to further improve the humidity control performance and the adsorptivity as compared with the conventional fiber board.
[0067]
According to the invention of claim 2 or 4, by adding calcium chloride to the slurry, it is possible to further improve the humidity control performance of the decorative board.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of an interior decorative board according to an embodiment of the present invention.
FIG. 2 is a diagram schematically showing a hardness measurement test apparatus.
FIG. 3 is a diagram schematically showing a steel ball drop test apparatus.
4 is a graph showing moisture absorption / release characteristics in Test Example 1. FIG.
5 is a graph showing moisture absorption / release characteristics in Test Example 2. FIG.
6 is a graph showing moisture absorption / release characteristics in Test Example 3. FIG.
[Explanation of symbols]
1 Interior decorative board

Claims (4)

繊維材料、無機充填材、結合材及びB型シリカゲルが水に分散されたスラリーを抄造、脱水、成形してなる基材を備え、
上記基材が熱圧プレス処理されて成形されていることを特徴とする内装用化粧板。
A base material formed by papermaking, dehydrating and molding a slurry in which fiber material, inorganic filler, binder and B-type silica gel are dispersed in water,
An interior decorative board, wherein the base material is molded by hot-pressing.
請求項1の内装用化粧板において、
スラリーに塩化カルシウムが添加されていることを特徴とする請求項1の内装用化粧板。
The interior decorative board according to claim 1,
The interior decorative board according to claim 1, wherein calcium chloride is added to the slurry.
繊維材料、無機充填材、結合材及びB型シリカゲルを水に分散かつ混練してスラリーを生成する工程と、
上記スラリーを抄造、脱水、成形して基材を形成する工程と、
上記基材を熱圧プレス処理する工程とを有すること特徴とする内装用化粧板の製造方法。
A step of dispersing and kneading the fiber material, inorganic filler, binder and B-type silica gel in water to produce a slurry;
Forming the substrate by papermaking, dewatering and molding the slurry; and
A method for producing a decorative board for interior use, comprising a step of subjecting the substrate to a hot-pressing process.
請求項3の内装用化粧板の製造方法において、
スラリーを生成する工程で該スラリーに塩化カルシウムを添加することを特徴とする内装用化粧板の製造方法。
In the manufacturing method of the decorative board for interior of Claim 3,
A method for producing an interior decorative board, wherein calcium chloride is added to the slurry in the step of producing the slurry.
JP2003187019A 2003-06-30 2003-06-30 Interior decorative board and method for producing the same Expired - Fee Related JP4143486B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2003187019A JP4143486B2 (en) 2003-06-30 2003-06-30 Interior decorative board and method for producing the same

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2003187019A JP4143486B2 (en) 2003-06-30 2003-06-30 Interior decorative board and method for producing the same

Publications (2)

Publication Number Publication Date
JP2005023531A true JP2005023531A (en) 2005-01-27
JP4143486B2 JP4143486B2 (en) 2008-09-03

Family

ID=34185997

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2003187019A Expired - Fee Related JP4143486B2 (en) 2003-06-30 2003-06-30 Interior decorative board and method for producing the same

Country Status (1)

Country Link
JP (1) JP4143486B2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006342594A (en) * 2005-06-09 2006-12-21 Noda Corp Substrate material for construction
JP2009107196A (en) * 2007-10-30 2009-05-21 Daiken Corp Woody fiberboard and its producing method
CN109797951A (en) * 2019-03-20 2019-05-24 常卫星 A kind of metope pattern decorative silica gel pattern mould and construction technology

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7406353B2 (en) * 2018-11-20 2023-12-27 大建工業株式会社 Inorganic board, ceiling finishing material, ceiling structure, and manufacturing method of inorganic board

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006342594A (en) * 2005-06-09 2006-12-21 Noda Corp Substrate material for construction
JP2009107196A (en) * 2007-10-30 2009-05-21 Daiken Corp Woody fiberboard and its producing method
CN109797951A (en) * 2019-03-20 2019-05-24 常卫星 A kind of metope pattern decorative silica gel pattern mould and construction technology
CN109797951B (en) * 2019-03-20 2023-09-22 常卫星 Silica gel template for wall surface pattern decoration and construction process

Also Published As

Publication number Publication date
JP4143486B2 (en) 2008-09-03

Similar Documents

Publication Publication Date Title
CN107877624B (en) Sound-insulation noise-reduction composite bamboo fiberboard
JP6328426B2 (en) Ceiling tile base mat
JP6663750B2 (en) Particle board
JP4143486B2 (en) Interior decorative board and method for producing the same
Liu et al. Evaluation of mechanical properties and formaldehyde emissions of particleboards with nanomaterial-added melamine-impregnated papers
JP3891963B2 (en) Manufacturing method of interior decorative panel
JP4939144B2 (en) Mineral fiberboard and manufacturing method thereof
JP4468760B2 (en) Inorganic papermaking board and method for producing the same
JP3523624B2 (en) Wood fiberboard
JP4894682B2 (en) Manufacturing method of fiberboard panel
JP2000095553A (en) Wood-wool cement board
JP3523623B2 (en) Wood fiberboard
JP7406353B2 (en) Inorganic board, ceiling finishing material, ceiling structure, and manufacturing method of inorganic board
JP2010253817A (en) Method for manufacturing fiber board
JP2005213712A (en) Lightweight fiberboard and straw mat flooring given by using the same
JP2670003B2 (en) Inorganic plate
JPS6054440B2 (en) Method for manufacturing mineral fiberboard
JP4150528B2 (en) Manufacturing method of inorganic board
JP2004122722A (en) Producing method for fire retardant board, and fire retardant board
JP4120263B2 (en) Rock wool board manufacturing method
JP5137353B2 (en) Inorganic board and method for producing the same
JP2006002501A (en) Humidity conditioning interior material with antifouling property
JP2004091231A (en) Woody cement board and production method therefor
JP5714923B2 (en) INORGANIC PLATE AND METHOD FOR PRODUCING INORGANIC PLATE
JP2009144452A (en) Humidity adjustment panel

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20060623

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20080416

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20080603

A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20080616

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20110620

Year of fee payment: 3

R150 Certificate of patent or registration of utility model

Ref document number: 4143486

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R150

Free format text: JAPANESE INTERMEDIATE CODE: R150

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20140620

Year of fee payment: 6

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

LAPS Cancellation because of no payment of annual fees