JP5212039B2 - Fiber mixed papermaking board and manufacturing method thereof - Google Patents

Fiber mixed papermaking board and manufacturing method thereof Download PDF

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JP5212039B2
JP5212039B2 JP2008294229A JP2008294229A JP5212039B2 JP 5212039 B2 JP5212039 B2 JP 5212039B2 JP 2008294229 A JP2008294229 A JP 2008294229A JP 2008294229 A JP2008294229 A JP 2008294229A JP 5212039 B2 JP5212039 B2 JP 5212039B2
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fiber
pulp
length
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freeness
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JP2010120790A (en
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渡 中島
陽一 上田
優忠 井東
浩 三上
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Ube Corp
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Ube Industries Ltd
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    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/00241—Physical properties of the materials not provided for elsewhere in C04B2111/00
    • C04B2111/00318—Materials characterised by relatively small dimensions, e.g. small thickness
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/91—Use of waste materials as fillers for mortars or concrete

Description

本発明は、建築物の外装壁、内装壁に使用される繊維混入抄造板及びその製造方法に関するものである。   The present invention relates to an exterior wall of a building, a fiber-mixed papermaking plate used for an interior wall, and a method for manufacturing the same.

従来、抄造法により製造した建造物用壁材は、補強繊維として石綿が使用されていたが、近年、石綿による公害が問題となっていた。そのため、現在、石綿板の代替として、ポリビニルアルコール繊維、ポリプロピレン繊維、ポリエチレン繊維、ガラス繊維、カーボン繊維、パルプ繊維等で補強した無石綿の壁材が使用されている。しかし、上記ポリビニルアルコール繊維、ポリプロピレン繊維、ポリエチレン繊維、パルプ繊維等で補強した無石綿壁材は繊維添加により曲げ強度、衝撃性能はある程度向上するものの、未だ性能が不十分であった。その欠点を解消するために、補強繊維の繊度、繊維長等が特定の範囲にあるポリビニルアルコール系繊維を用いることにより、これらの欠点を解消した抄造板が開示されている（例えば、特許文献１及び２参照）。
特開２００３−２６７７６８号公報 特開２００６−１１２０３８号公報 Conventionally, asbestos is used as a reinforcing fiber for building wall materials manufactured by papermaking, but in recent years, pollution caused by asbestos has been a problem. Therefore, asbestos board is currently replaced by asbestos wall material reinforced with polyvinyl alcohol fiber, polypropylene fiber, polyethylene fiber, glass fiber, carbon fiber, pulp fiber or the like. However, the asbestos wall material reinforced with the above-mentioned polyvinyl alcohol fiber, polypropylene fiber, polyethylene fiber, pulp fiber, etc., has improved its bending strength and impact performance to some extent by the addition of the fiber, but its performance is still insufficient. In order to eliminate the drawbacks, a papermaking board has been disclosed in which these disadvantages are eliminated by using polyvinyl alcohol fibers in which the fineness and fiber length of the reinforcing fibers are in a specific range (for example, Patent Document 1). And 2).
JP 2003-267768 A JP 2006-112038 A

しかしながら、このポリビニルアルコール系繊維を用いた抄造板は、抄造時の濾水性が高まりすぎ、抄造板のマトリックス成分（セメント、フライアッシュ等）が排水されることにより、板の各層の層間強度が低下し、剥離が発生する。そのため層間剥離の発生しない抄造板が望まれていた。
そこで、本発明は、層間剥離が発生せず、長さ変化率、曲げ強度等の諸物性も十分である抄造板及びその製造方法を提供することを目的とする。 However, the papermaking board using this polyvinyl alcohol fiber has too high drainage at the time of papermaking, and the matrix strength (cement, fly ash, etc.) of the papermaking board is drained, resulting in a decrease in interlayer strength of each layer of the board. And peeling occurs. Therefore, a papermaking plate that does not cause delamination has been desired.
Accordingly, an object of the present invention is to provide a papermaking plate that does not cause delamination and has sufficient physical properties such as a rate of change in length and bending strength, and a method for manufacturing the same.

本発明者等は、上記課題を解決するために鋭意検討した結果、特定の濾水度（ＣＳＦ）を有する叩解パルプを使用することにより、上記課題を解決することを見出し、本発明を完成するに至った。
即ち、本発明は、セメント、フライアッシュ、パーライト、アタパルジャイト、アクリル系繊維及びパルプを含む繊維混入抄造板であって、パルプが針葉樹を叩解した叩解パルプであり、該叩解パルプの濾水度が５０〜２５０ｍｌ、繊維長が０．５〜５ｍｍ、裂断長が５〜１５ｋｍ、比破裂度が３〜１０ｋＰａ・ｍ２/ｇ及び比引裂度が５〜１５ｍＮ・ｍ２/ｇである繊維混入抄造板に関する。
また、水と針葉樹パルプとを混合した後、叩解機により叩解し、濾水度が５０〜２５０ｍｌ、繊維長が０．５〜５ｍｍ、裂断長が５〜１５ｋｍ、比破裂度が３〜１０ｋＰａ・ｍ２/ｇ及び比引裂度が５〜１５ｍＮ・ｍ２/ｇである叩解パルプのスラリーを調製する工程と、原料スラリーを丸網に供給して抄造し、シートを調製する工程と、シートをプレスで加圧した後、蒸気養生する工程とを含むことを特徴とする繊維混入抄造板の製造方法に関する。 As a result of intensive studies to solve the above problems, the present inventors have found that the above problems can be solved by using beaten pulp having a specific freeness (CSF), and the present invention is completed. It came to.
That is, the present invention is a fiber-mixed papermaking board containing cement, fly ash, pearlite, attapulgite, acrylic fiber and pulp, wherein the pulp is beaten pulp beaten conifers, and the freeness of the beaten pulp is 50 -250 ml, fiber length 0.5-5 mm, tear length 5-15 km, specific burst rate 3-10 kPa · m 2 / g and specific tear rate 5-15 mN · m 2 / g Regarding the board.
Moreover, after mixing water and conifer pulp, it is beaten with a beater, the freeness is 50 to 250 ml, the fiber length is 0.5 to 5 mm, the breaking length is 5 to 15 km, and the specific bursting degree is 3 to 10 kPa. A step of preparing a slurry of beating pulp having a m 2 / g and a specific tear rate of 5 to 15 mN · m 2 / g, a step of supplying a raw slurry to a round net, making a sheet, and preparing a sheet; The present invention relates to a method for producing a fiber-mixed papermaking board, comprising: a step of steam curing after pressing with a press.

本発明の繊維混入抄造板は、特定の濾水度（ＣＳＦ）、繊維長、裂断長、比破裂度及び比引裂度を有する叩解パルプを使用し、特定の配合とすることにより、層間剥離が発生せず、長さ変化率、曲げ強度等の諸物性も十分である繊維混入抄造板を得ることが出来る。   The fiber mixed papermaking board of the present invention uses a beaten pulp having a specific freeness (CSF), fiber length, breaking length, specific bursting degree, and specific tearing degree, and is delaminated by using a specific blend. Can be obtained, and a fiber-mixed papermaking sheet having sufficient physical properties such as a rate of change in length and bending strength can be obtained.

以下、本発明に係る繊維混入抄造板及びその製造方法の好適な実施形態について詳細に説明する。   DESCRIPTION OF EMBODIMENTS Hereinafter, preferred embodiments of a fiber-mixed papermaking plate and a manufacturing method thereof according to the present invention will be described in detail.

＜繊維混入抄造板＞
本発明の繊維混入抄造板は、セメント、フライアッシュ、パーライト、アタパルジャイト、アクリル系繊維及びパルプを含み、パルプは針葉樹を叩解した叩解パルプ（ＮＵＫＰ）を含んでいる。広葉樹に比べ針葉樹は繊維長が長く、強度も十分あり繊維混入抄造板の層間強度が高まるため好ましい。
叩解パルプの濾水度（ＣＳＦ）は５０〜２５０ｍｌ、好ましくは８０〜２００ｍｌ、より好ましくは１００〜１５０ｍｌである。繊維長は０．５〜５ｍｍ、好ましくは１〜４ｍｍ、より好ましくは１．５〜３ｍｍである。裂断長は５〜１５ｋｍ、好ましくは６〜１２ｋｍ、より好ましくは７〜１０ｋｍである。比破裂度は３〜１０ｋＰａ・ｍ２/ｇ、好ましくは４〜８ｋＰａ・ｍ２/ｇ、より好ましくは５〜７ｋＰａ・ｍ２/ｇである。比引裂度は５〜１５ｍＮ・ｍ２/ｇ、好ましくは６〜１２ｍＮ・ｍ２/ｇ、より好ましくは７〜１０ｍＮ・ｍ２/ｇである。これらの範囲であれば、層間剥離が発生せず、長さ変化率、曲げ強度等の諸物性も十分である繊維混入抄造板を得ることが出来る。 <Fiber mixed papermaking>
The fiber-mixed papermaking board of the present invention includes cement, fly ash, pearlite, attapulgite, acrylic fiber, and pulp, and the pulp includes beaten pulp (NUKP) obtained by beating softwood. Compared to hardwood, softwood is preferable because it has a long fiber length and sufficient strength and increases the interlaminar strength of the fiber-mixed papermaking board.
The freeness (CSF) of the beaten pulp is 50 to 250 ml, preferably 80 to 200 ml, more preferably 100 to 150 ml. The fiber length is 0.5 to 5 mm, preferably 1 to 4 mm, more preferably 1.5 to 3 mm. The breaking length is 5 to 15 km, preferably 6 to 12 km, more preferably 7 to 10 km. The specific burst degree is 3 to 10 kPa · m 2 / g, preferably 4 to 8 kPa · m 2 / g, more preferably 5 to 7 kPa · m 2 / g. The specific tear is 5 to 15 mN · m 2 / g, preferably 6 to 12 mN · m 2 / g, more preferably 7 to 10 mN · m 2 / g. Within these ranges, it is possible to obtain a fiber-mixed papermaking sheet in which delamination does not occur and various physical properties such as a rate of change in length and bending strength are sufficient.

アクリル系繊維の繊度は１．０〜３．０ｄｔｅｘ、好ましくは１．２〜２．５ｄｔｅｘ、より好ましくは１．５〜２．０ｄｔｅｘである。繊維長は３〜１０ｍｍ、好ましくは４〜８ｍｍ、より好ましくは５〜７ｍｍである。これらの範囲であれば、層間剥離が発生せず、長さ変化率、曲げ強度等の諸物性も十分である繊維混入抄造板を得ることが出来る。
本発明の繊維混入抄造板は、更に、叩解してない針葉樹パルプ及び／又は古紙パルプを含んでも良い。
針葉樹パルプの濾水度は５００〜９００ｍｌ、好ましくは６００〜８００ｍｌ、より好ましくは６５０〜７５０ｍｌである。繊維長は１〜５ｍｍ、好ましくは１．５〜４ｍｍ、より好ましくは２〜３ｍｍである。裂断長は２〜８ｋｍ、好ましくは４〜７ｋｍ、より好ましくは４．５〜６ｋｍである。比破裂度は１〜５ｋＰａ・ｍ２/ｇ、好ましくは１．５〜４ｋＰａ・ｍ２/ｇ、より好ましくは２．０〜３．５ｋＰａ・ｍ２/ｇである。比引裂度は５〜２０ｍＮ・ｍ２/ｇ、好ましくは７〜１８ｍＮ・ｍ２/ｇ、より好ましくは１０〜１５ｍＮ・ｍ２/ｇである。これらの範囲であれば、層間剥離が発生せず、長さ変化率、曲げ強度等の諸物性も十分である繊維混入抄造板を得ることが出来る。 The fineness of the acrylic fiber is 1.0 to 3.0 dtex, preferably 1.2 to 2.5 dtex, more preferably 1.5 to 2.0 dtex. The fiber length is 3 to 10 mm, preferably 4 to 8 mm, more preferably 5 to 7 mm. Within these ranges, it is possible to obtain a fiber-mixed papermaking sheet in which delamination does not occur and various physical properties such as a rate of change in length and bending strength are sufficient.
The fiber-mixed papermaking board of the present invention may further contain softwood pulp and / or waste paper pulp that has not been beaten.
The freeness of the softwood pulp is 500 to 900 ml, preferably 600 to 800 ml, more preferably 650 to 750 ml. The fiber length is 1 to 5 mm, preferably 1.5 to 4 mm, more preferably 2 to 3 mm. The breaking length is 2 to 8 km, preferably 4 to 7 km, more preferably 4.5 to 6 km. The specific burst degree is 1 to 5 kPa · m 2 / g, preferably 1.5 to 4 kPa · m 2 / g, more preferably 2.0 to 3.5 kPa · m 2 / g. The specific tear is 5 to 20 mN · m 2 / g, preferably 7 to 18 mN · m 2 / g, more preferably 10 to 15 mN · m 2 / g. Within these ranges, it is possible to obtain a fiber-mixed papermaking sheet in which delamination does not occur and various physical properties such as a rate of change in length and bending strength are sufficient.

古紙パルプの濾水度は２００〜５００ｍｌ、好ましくは２５０〜４００ｍｌ、より好ましくは２７０〜３５０ｍｌである。繊維長は０．５〜３ｍｍ、好ましくは１．０〜２．７ｍｍ、より好ましくは１．２〜２．５ｍｍである。裂断長は２〜６ｋｍ、好ましくは２．５〜５ｋｍ、より好ましくは３．０〜４．５ｋｍである。比破裂度は０．５〜４ｋＰａ・ｍ２/ｇ、好ましくは１〜３ｋＰａ・ｍ２/ｇ、より好ましくは１．５〜２．５ｋＰａ・ｍ２/ｇである。比引裂度は３〜１０ｍＮ・ｍ２/ｇ、好ましくは４〜９ｍＮ・ｍ２/ｇ、より好ましくは５〜８．５ｍＮ・ｍ２/ｇである。これらの範囲であれば、層間剥離が発生せず、長さ変化率、曲げ強度等の諸物性も十分である繊維混入抄造板を得ることが出来る。
本発明の繊維混入抄造板は、セメント２０〜５０質量％、好ましくは２５〜４０質量％、より好ましくは２７〜３５質量％である。フライアッシュは３０〜７０質量％、好ましくは４０〜６０質量％、より好ましくは４５〜５５質量％である。パーライトは２〜８質量％、好ましくは２．５〜７．５質量％、より好ましくは３〜７質量％である。アタパルジャイトは０．２〜５質量％、好ましくは０．４〜４質量％、より好ましくは０．８〜３質量％である。 The freeness of the waste paper pulp is 200 to 500 ml, preferably 250 to 400 ml, more preferably 270 to 350 ml. The fiber length is 0.5 to 3 mm, preferably 1.0 to 2.7 mm, more preferably 1.2 to 2.5 mm. The breaking length is 2 to 6 km, preferably 2.5 to 5 km, more preferably 3.0 to 4.5 km. The ratio rupture degree 0.5~4kPa · m 2 / g, preferably 1~3kPa · m 2 / g, more preferably 1.5~2.5kPa · m 2 / g. The specific tear rate is 3 to 10 mN · m 2 / g, preferably 4 to 9 mN · m 2 / g, and more preferably 5 to 8.5 mN · m 2 / g. Within these ranges, it is possible to obtain a fiber-mixed papermaking sheet in which delamination does not occur and various physical properties such as a rate of change in length and bending strength are sufficient.
The fiber-mixed papermaking plate of the present invention is 20 to 50% by mass of cement, preferably 25 to 40% by mass, and more preferably 27 to 35% by mass. The fly ash is 30 to 70% by mass, preferably 40 to 60% by mass, and more preferably 45 to 55% by mass. Perlite is 2-8 mass%, Preferably it is 2.5-7.5 mass%, More preferably, it is 3-7 mass%. Attapulgite is 0.2 to 5% by mass, preferably 0.4 to 4% by mass, and more preferably 0.8 to 3% by mass.

アクリル系繊維は０．２〜５質量％、好ましくは０．５〜４質量％、より好ましくは０．７〜３質量％である。パルプは３〜１０質量％、好ましくは４〜９質量％、より好ましくは５〜８質量％である。これらの範囲であれば、層間剥離が発生せず、長さ変化率、曲げ強度等の諸物性も十分である繊維混入抄造板を得ることが出来る。
パルプ全量中、叩解パルプは少量含まれていれば良いが、好ましくは１０〜１００質量％、より好ましくは２０〜９０質量％、更に好ましくは３０〜８０質量％である。古紙パルプは０〜９０質量％、好ましくは１０〜８０質量％、より好ましくは２０〜７５質量％である。針葉樹パルプは０〜９０質量％、好ましくは１０〜８０質量％、より好ましくは２０〜７５質量％である。これらの範囲であれば、層間剥離が発生せず、長さ変化率、曲げ強度等の諸物性も十分である繊維混入抄造板を得ることが出来る。 The acrylic fiber is 0.2 to 5% by mass, preferably 0.5 to 4% by mass, and more preferably 0.7 to 3% by mass. The pulp is 3 to 10% by mass, preferably 4 to 9% by mass, more preferably 5 to 8% by mass. Within these ranges, it is possible to obtain a fiber-mixed papermaking sheet in which delamination does not occur and various physical properties such as a rate of change in length and bending strength are sufficient.
The beaten pulp may be contained in a small amount in the total amount of the pulp, but it is preferably 10 to 100% by mass, more preferably 20 to 90% by mass, and further preferably 30 to 80% by mass. The waste paper pulp is 0 to 90% by mass, preferably 10 to 80% by mass, and more preferably 20 to 75% by mass. The softwood pulp is 0 to 90% by mass, preferably 10 to 80% by mass, and more preferably 20 to 75% by mass. Within these ranges, it is possible to obtain a fiber-mixed papermaking sheet in which delamination does not occur and various physical properties such as a rate of change in length and bending strength are sufficient.

＜繊維混入抄造板の製造方法＞
次に、本発明の繊維混入抄造板の製造方法について説明する。
まず、水と針葉樹無漂白パルプを混合し叩解機により濾水度を５０〜２５０ｍｌ、繊維長を０．５〜５ｍｍ、裂断長を５〜１５ｋｍ、比破裂度を３〜１０ｋＰａ・ｍ２/ｇ及び比引裂度を５〜１５ｍＮ・ｍ２/ｇに叩解し叩解パルプのスラリーを調製する。水と針葉樹無漂白パルプの混合割合は水１００質量部に対して針葉樹無漂白パルプ１〜５質量部、好ましくは２〜４．５質量部、より好ましくは２．５〜４質量部である。これらの範囲であれば、十分に叩解が行え、所定の特性を持つ叩解パルプが得られる。 <Manufacturing method of fiber mixed papermaking plate>
Next, the manufacturing method of the fiber mixed papermaking board of this invention is demonstrated.
First, water and softwood unbleached pulp are mixed, and the freeness is 50 to 250 ml by a beating machine, the fiber length is 0.5 to 5 mm, the breaking length is 5 to 15 km, and the specific bursting degree is 3 to 10 kPa · m 2 / G and the specific tear degree are beaten to 5 to 15 mN · m 2 / g to prepare a beaten pulp slurry. The mixing ratio of water and softwood unbleached pulp is 1 to 5 parts by weight, preferably 2 to 4.5 parts by weight, and more preferably 2.5 to 4 parts by weight with respect to 100 parts by weight of water. If it is these ranges, it can fully beat and the beat pulp with a predetermined characteristic is obtained.

叩解機（リファイナー）としては繊維を叩解する一般的装置であれば問題なく、シングルディスクリファイナー、ダブルディスクリファイナー等が好適に使用可能である。
次いで、叩解パルプのスラリーに必要に応じて、古紙パルプや、叩解してない針葉樹パルプそのものを加え、パルパー等の混合機で混合し、パルプスラリーを調製しても良い。
次に、このパルプスラリーと、セメント、フライアッシュ、パーライト、アタパルジャイト、アクリル系繊維及び撥水剤とを混合機で混合し、原料スラリーを調製する。
次いで、原料スラリーに凝集剤を添加した後、抄造機に移送し、丸網で抄き上げて２〜６層に重ね、さらにこの層を３〜１０回積層して１枚のシートにする。
次いで、シートを１０〜３０ＭＰａのプレス圧力で搾水し、所定の枚数をパレット上に積上げた後、養生シートで製品を覆い養生温度５０〜１００℃、飽和湿度条件下で１０〜６０時間蒸気養生し、蒸気養生後、乾燥ラインにて含水率を調整する。養生は蒸気養生だけでなく、オートクレーブ養生でも良い。これらの工程を経て所定の厚さ、比重のボードを製造する。 As a beating machine (refiner), there is no problem as long as it is a general apparatus for beating fibers, and a single disc refiner, a double disc refiner, or the like can be suitably used.
Next, if necessary, waste paper pulp or softwood pulp that has not been beaten may be added to the beaten pulp slurry and mixed with a mixer such as a pulper to prepare a pulp slurry.
Next, this pulp slurry is mixed with cement, fly ash, perlite, attapulgite, acrylic fiber and water repellent with a mixer to prepare a raw material slurry.
Next, after adding a flocculant to the raw material slurry, the flocculant is transferred to a papermaking machine, rolled up by a round net and stacked in 2 to 6 layers, and this layer is further stacked 3 to 10 times to form one sheet.
Next, the sheet is squeezed with a press pressure of 10 to 30 MPa, and a predetermined number of sheets are stacked on a pallet, and then the product is covered with a curing sheet and steam curing is performed for 10 to 60 hours at a curing temperature of 50 to 100 ° C. and saturated humidity. Then, after steam curing, adjust the moisture content in the drying line. The curing may be not only steam curing but also autoclave curing. A board having a predetermined thickness and specific gravity is manufactured through these steps.

以下に、実施例を用いて本発明を詳細に説明するが、本発明はこれらの実施例に限定されるものではない。   EXAMPLES The present invention will be described in detail below using examples, but the present invention is not limited to these examples.

[１．繊維混入抄造板の製造]
以下の材料、製造方法により繊維混入抄造板を製造した。
（１）使用材料
・普通ポルトランドセメント
・フライアッシュ
・無機粉末
・パーライト：宇部興産株式会社製、パーライト１型Ａ
・アクリル系繊維：繊度１．７０ｄｔｅｘ（平均値）、繊維長６mm（平均値）
・アタパルジャイト：粘度１４０ｂｂｌ/ｔ
・パルプ：以下の３種類（針葉樹無漂白パルプ、古紙パルプ、叩解パルプ）を使用した。
（ａ）針葉樹無漂白パルプ（以下ＮＵＫＰと称す）：濾水度（ＣＳＦ）７０８ｍｌ、繊維長２．５ｍｍ、裂断長５．１ｋｍ、比破裂度２．９、比引裂度１３．６ｍＮ・ｍ２/ｇ
（ｂ）古紙パルプ：濾水度（ＣＳＦ）３０６ｍｌ、繊維長１．９ｍｍ、裂断長３．８ｋｍ、比破裂度１．９、比引裂度７．９ｍＮ・ｍ２/ｇ
（ｃ）叩解パルプ：上記のＮＵＫＰをパルプ叩解機（ダブルディスクレファイナー）で叩解することにより調製した。特性は、以下の通りである。
濾水度（ＣＳＦ）１２４ｍｌ、繊維長２．０ｍｍ、裂断長８．６ｋｍ、比破裂度６．１、比引裂度８．０ｍＮ・ｍ２/ｇ [1. Production of fiber mixed papermaking board]
A fiber mixed papermaking board was manufactured by the following materials and manufacturing method.
(1) Materials used: Ordinary Portland cement, fly ash, inorganic powder, pearlite: manufactured by Ube Industries, Ltd., pearlite type 1 A
Acrylic fiber: Fineness 1.70 dtex (average value), fiber length 6 mm (average value)
・ Attapulgite: viscosity 140bbl / t
Pulp: The following three types (conifer unbleached pulp, waste paper pulp, and beaten pulp) were used.
(A) Softwood unbleached pulp (hereinafter referred to as NUKP): Freeness (CSF) 708 ml, Fiber length 2.5 mm, Breaking length 5.1 km, Specific bursting rate 2.9, Specific tearing rate 13.6 mN · m 2 / g
(B) Waste paper pulp: freezing degree (CSF) 306 ml, fiber length 1.9 mm, breaking length 3.8 km, specific bursting degree 1.9, specific tearing degree 7.9 mN · m 2 / g
(C) Beating pulp: It was prepared by beating the above NUKP with a pulp beater (double disc refiner). The characteristics are as follows.
Freeness (CSF) 124 ml, fiber length 2.0 mm, breaking length 8.6 km, specific bursting rate 6.1, specific tearing rate 8.0 mN · m 2 / g

なお、パルプの各特性は平均値である。
・撥水剤：アニオン系
・凝集剤：アクリルアミド系
・水：上水道水と工程水
なお、各種パルプの濾水度は、ＪＩＳ Ｐ ８１２１「パルプの濾水度試験方法」のカナダ標準型に準じて測定し、スラリー濃度０．３質量％、温度２０℃に補正した平均値を濾水度（ＣＳＦ）（ｍｌ）として評価した。裂断長はＪＩＳ Ｐ ８１１３「紙及び板紙−引張特性の試験方法−第２部：定速伸張法」、比破裂度はＪＩＳ Ｐ ８１１２「紙−破裂強さ試験方法」、比引裂度はＪＩＳ P ８１１６「紙−引裂強さ試験方法−エルメンドルフ形引裂試験機法」に準じて測定した。 In addition, each characteristic of a pulp is an average value.
・ Water repellent: Anionic type ・ Aggregating agent: Acrylamide type ・ Water: tap water and process water Note that the freeness of various pulps is in accordance with the Canadian standard type of JIS P 8121 “Testing method for freeness of pulp” The average value measured and corrected to a slurry concentration of 0.3 mass% and a temperature of 20 ° C. was evaluated as freeness (CSF) (ml). The tear length is JIS P 8113 “Paper and paperboard-Test method for tensile properties-Part 2: Constant speed stretch method”, the specific burst is JIS P 8112 “Paper-burst strength test”, and the specific tear is JIS It was measured in accordance with P 8116 “Paper—Tear Strength Test Method—Elmendorf Tear Tester Method”.

（２）繊維混入抄造板の製造
水１１．６ｍ３と叩解パルプ４００ｋｇを混合したスラリーをパルプ叩解機（ダブルディスクレファイナー）に投入し、叩解パルプの濾水度（ＣＳＦ）を１２４ｍｌにした。さらに、古紙パルプ、ＮＵＫＰを加え、パルパー（混合機）で混合しパルプスラリーを調製した。次に、このパルプスラリーと、セメント、フライアッシュ、再生粉、パーライト、アクリル系繊維、アタパルジャイト及び撥水剤をパルパーで混合し繊維混入抄造板用原料スラリーを調製した。
原料スラリーの配合を表１に示す。また、パルプ中の古紙パルプ、叩解パルプ、ＮＵＫＰの割合を表２に示す。 (2) Production of fiber-mixed papermaking board A slurry obtained by mixing 11.6 m 3 of water and 400 kg of beating pulp was put into a pulp beating machine (double disc refiner), and the freeness (CSF) of beating pulp was 124 ml. Furthermore, waste paper pulp and NUKP were added and mixed with a pulper (mixer) to prepare a pulp slurry. Next, this pulp slurry was mixed with cement, fly ash, regenerated powder, pearlite, acrylic fiber, attapulgite and water repellent with a pulper to prepare a fiber-mixed papermaking raw material slurry.
Table 1 shows the composition of the raw slurry. Table 2 shows the ratio of waste paper pulp, beating pulp, and NUKP in the pulp.

Figure 0005212039
Figure 0005212039

Figure 0005212039
Figure 0005212039

次に、原料スラリーをチェストに移送し、混合タンクで水と混ぜて濃度を８．５質量％に希釈した。更にこのスラリーに凝集剤を添加した後、抄造機に移送し、円形の金網（丸網）で抄き上げて４層に重ね、さらにこの層を６回積層して１枚のシートにした。
そのシートを１５ＭＰａのプレス圧力で搾水し、所定の枚数をパレット上に積上げた後、養生シートで製品を覆い養生温度85℃、飽和湿度条件下で24時間蒸気養生し、蒸気養生後、乾燥ラインにて含水率を調整した。これらの工程を経て厚さ１１．８ｍｍ、比重１．１４のボードを製造した。 Next, the raw material slurry was transferred to a chest and mixed with water in a mixing tank to dilute the concentration to 8.5% by mass. Further, after adding a flocculant to this slurry, it was transferred to a papermaking machine, made up with a circular wire mesh (round mesh), and stacked in 4 layers, and this layer was further laminated 6 times into one sheet.
The sheet is squeezed with a press pressure of 15 MPa, and a predetermined number of sheets are stacked on the pallet, and then the product is covered with a curing sheet, steam-cured for 24 hours at a curing temperature of 85 ° C and saturated humidity, dried after steam curing The moisture content was adjusted in the line. Through these steps, a board having a thickness of 11.8 mm and a specific gravity of 1.14 was manufactured.

[２．繊維混入抄造板の評価]
得られた繊維混入抄造板は、吸水率、かさ比重、長さ変化率、平面接着強度、曲げ強度の各種評価試験を行った。評価結果を表３に示す。
なお、吸水率、かさ比重はＪＩＳ A ５４３０「繊維補強セメント板」に準拠し、２４時間吸水させた後、１０５℃で２４時間乾燥し常温となった後、測定した。
長さ変化率はＪＩＳ Ａ ５４３０「繊維補強セメント板」に準拠し、試料を２０℃、飽和湿度環境下にて調湿した後の寸法を測定し、次いで試料を水中に２４時間浸漬し、浸漬後の試料の寸法を測定した。そして水中浸漬前後の寸法から寸法変化率を測定した。 [2. Evaluation of fiber mixed papermaking board]
The resulting fiber-mixed papermaking board was subjected to various evaluation tests of water absorption, bulk specific gravity, length change rate, planar adhesive strength, and bending strength. The evaluation results are shown in Table 3.
The water absorption rate and bulk specific gravity were measured in accordance with JIS A 5430 “Fiber Reinforced Cement Board” after absorbing water for 24 hours and drying at 105 ° C. for 24 hours to reach room temperature.
The rate of change in length is in accordance with JIS A 5430 “Fiber Reinforced Cement Board”, and the dimensions of the sample after conditioning in a saturated humidity environment at 20 ° C. are measured, and then the sample is immersed in water for 24 hours. The dimensions of the later samples were measured. The dimensional change rate was measured from the dimensions before and after immersion in water.

平面接着強度は、繊維混入抄造板を４０×４０mmの大きさに切り出したものを試料とし、ＪＩＳ A ５９０８「パーティクルボード」に準拠し、株式会社丸菱科学機械製作所製小型接着剥離試験機を用いアタッチメントを接着面と直角方向に約２mm／分の荷重速度で引っ張り、測定した。曲げ強度は、幅５０mm、長さ１５０mmの大きさで、抄造方向を長さ方向として切り出したものを試料とし、ＪＩＳ A ５４２２「窯業系サイディング」に準拠し、島津製作所製 オートグラフＡＧ２０００Ｃを用い、載荷荷重速度２mm／分、曲げスパン１００ｍｍで測定した。   The plane adhesion strength is obtained by cutting a fiber-made papermaking sheet into a size of 40 × 40 mm, using a small adhesion peel tester manufactured by Maruhishi Science Machinery Co., Ltd. in accordance with JIS A 5908 “Particle Board”. The attachment was pulled at a load speed of about 2 mm / min in the direction perpendicular to the adhesive surface and measured. The bending strength is 50 mm wide and 150 mm long, with the papermaking direction cut in the length direction as a sample, in accordance with JIS A 5422 “Ceramic Industry Siding”, using Shimadzu Autograph AG2000C, Measurement was performed at a loading load rate of 2 mm / min and a bending span of 100 mm.

Figure 0005212039
Figure 0005212039

表２及び表３に示すように、濾水度、繊維長、裂断長、比破裂度が本発明の範囲にある針葉樹を叩解した叩解パルプを使用した実施例１〜１０は平面接着強度が１．００Ｎ/ｍｍ２を超えており、層間剥離が生じ難く、また長さ変化率が小さく、曲げ強度も十分あるボードが得られた。 As shown in Tables 2 and 3, Examples 1 to 10 using beaten pulp obtained by beating conifers having freeness, fiber length, breaking length, and specific bursting in the scope of the present invention have flat adhesive strength. A board exceeding 1.00 N / mm 2 , hardly causing delamination, having a small length change rate, and having a sufficient bending strength was obtained.

Claims (6)

セメント、フライアッシュ、パーライト、アタパルジャイト、アクリル系繊維及びパルプを含む繊維混入抄造板であって、パルプが針葉樹を叩解した叩解パルプであり、該叩解パルプの濾水度が５０〜２５０ｍｌ、繊維長が０．５〜５ｍｍ、裂断長が５〜１５ｋｍ、比破裂度が３〜１０ｋＰａ・ｍ２/ｇ及び比引裂度が５〜１５ｍＮ・ｍ２/ｇであり、
セメント２０〜５０質量％、フライアッシュ３０〜７０質量％、パーライト２〜８質量％、アタパルジャイト０．２〜５質量％、アクリル系繊維０．２〜５質量％及びパルプ３〜１０質量％を含むことを特徴とする繊維混入抄造板。 A fiber-made papermaking board containing cement, fly ash, pearlite, attapulgite, acrylic fiber and pulp, wherein the pulp is beaten pulp beaten from conifers, and the freeness of the beaten pulp is 50 to 250 ml, and the fiber length is 0.5-5 mm, tear length is 5-15 km, specific burst is 3-10 kPa · m 2 / g and specific tear is 5-15 mN · m 2 / g ,
Cement 20-50%, fly ash 30-70%, perlite 2-8%, attapulgite 0.2-5%, acrylic fiber 0.2-5% and pulp 3-10% A fiber mixed papermaking board characterized by that . アクリル系繊維の繊度が１．０〜３．０ｄｔｅｘ及び繊維長が３〜１０ｍｍであることを特徴とする請求項１に記載の繊維混入抄造板。   The fiber-made papermaking board according to claim 1, wherein the acrylic fiber has a fineness of 1.0 to 3.0 dtex and a fiber length of 3 to 10 mm. パルプは、更に、針葉樹パルプ及び／又は古紙パルプを含むことを特徴とする請求項１又は２に記載の繊維混入抄造板。   The fiber mixed papermaking board according to claim 1 or 2, wherein the pulp further comprises softwood pulp and / or waste paper pulp. 針葉樹パルプの濾水度が５００〜９００ｍｌ、繊維長が１〜５ｍｍ、裂断長が２〜８ｋｍ、比破裂度が１〜５ｋＰａ・ｍ２/ｇ及び比引裂度が５〜２０ｍＮ・ｍ２/ｇであることを特徴とする請求項３に記載の繊維混入抄造板。 Freeness of softwood pulp 500～900Ml, fiber length 1 to 5 mm, breaking length is 2～8Km, specific rupture degree 1~5kPa · m 2 / g and a specific tear strength 5~20mN · m 2 / It is g, The fiber mixed papermaking board of Claim 3 characterized by the above-mentioned. 古紙パルプの濾水度が２００〜５００ｍｌ、繊維長が０．５〜３ｍｍ、裂断長が２〜６ｋｍ、比破裂度が０．５〜４ｋＰａ・ｍ２/ｇ及び比引裂度が３〜１０ｍＮ・ｍ２/ｇであることを特徴とする請求項３又は４に記載の繊維混入抄造板。 Waste paper pulp has a freeness of 200 to 500 ml, a fiber length of 0.5 to 3 mm, a breaking length of 2 to 6 km, a specific bursting rate of 0.5 to 4 kPa · m 2 / g and a specific tearing rate of 3 to 10 mN - fiber incorporation papermaking plate according to claim 3 or 4, characterized in that m is 2 / g. 水と針葉樹パルプとを混合した後、叩解機により叩解し、濾水度が５０〜２５０ｍｌ、繊維長が０．５〜５ｍｍ、裂断長が５〜１５ｋｍ、比破裂度が３〜１０ｋＰａ・ｍ２/ｇ及び比引裂度が５〜１５ｍＮ・ｍ２/ｇである叩解パルプのスラリーを調製する工程と、
叩解パルプのスラリーと、セメント、フライアッシュ、パーライト、アタパルジャイト及びアクリル系繊維とを混合し、原料スラリーを調製する工程と、
原料スラリーを丸網に供給して抄造し、シートを調製する工程と、
シートをプレスで加圧した後、蒸気養生し、請求項１記載の繊維混入抄造板を得る工程とを含むことを特徴とする繊維混入抄造板の製造方法。 After mixing water and softwood pulp, it is beaten with a beater, the freeness is 50 to 250 ml, the fiber length is 0.5 to 5 mm, the breaking length is 5 to 15 km, and the relative bursting degree is 3 to 10 kPa · m 2. preparing a slurry of beating pulp having a / g and specific tear of 5 to 15 mN · m 2 / g;
Mixing a slurry of beating pulp with cement, fly ash, perlite, attapulgite and acrylic fiber to prepare a raw slurry;
Supplying raw slurry to a round net, making paper, and preparing a sheet;
A method for producing a fiber-mixed papermaking board, comprising: pressurizing a sheet with a press and steam curing to obtain the fiber-mixed papermaking board according to claim 1 .
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