JPH07214532A - Manufacture of inorganic cement board - Google Patents
Manufacture of inorganic cement boardInfo
- Publication number
- JPH07214532A JPH07214532A JP990394A JP990394A JPH07214532A JP H07214532 A JPH07214532 A JP H07214532A JP 990394 A JP990394 A JP 990394A JP 990394 A JP990394 A JP 990394A JP H07214532 A JPH07214532 A JP H07214532A
- Authority
- JP
- Japan
- Prior art keywords
- layer
- mixed material
- board
- green sheet
- cement
- 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.)
- Withdrawn
Links
- 239000004568 cement Substances 0.000 title claims abstract description 46
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 13
- 239000000463 material Substances 0.000 claims abstract description 40
- 239000007864 aqueous solution Substances 0.000 claims abstract description 21
- 239000002002 slurry Substances 0.000 claims abstract description 8
- 239000000843 powder Substances 0.000 claims description 34
- 239000000835 fiber Substances 0.000 claims description 15
- 239000012615 aggregate Substances 0.000 claims description 12
- 230000004931 aggregating effect Effects 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 12
- 239000003795 chemical substances by application Substances 0.000 claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 14
- 238000003825 pressing Methods 0.000 abstract description 3
- 230000001788 irregular Effects 0.000 abstract description 2
- 238000005507 spraying Methods 0.000 abstract description 2
- 230000003311 flocculating effect Effects 0.000 abstract 1
- 238000000465 moulding Methods 0.000 description 25
- 238000001723 curing Methods 0.000 description 22
- 230000000052 comparative effect Effects 0.000 description 9
- 239000000203 mixture Substances 0.000 description 7
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 5
- 239000000701 coagulant Substances 0.000 description 5
- 125000000129 anionic group Chemical group 0.000 description 4
- 229920002401 polyacrylamide Polymers 0.000 description 4
- 239000011398 Portland cement Substances 0.000 description 3
- 239000007921 spray Substances 0.000 description 3
- 239000004566 building material Substances 0.000 description 2
- 239000010881 fly ash Substances 0.000 description 2
- 238000004898 kneading Methods 0.000 description 2
- 239000003973 paint Substances 0.000 description 2
- 235000011837 pasties Nutrition 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- -1 shirasu balloon Substances 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 229920002978 Vinylon Polymers 0.000 description 1
- 239000010425 asbestos Substances 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 239000011400 blast furnace cement Substances 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 230000001112 coagulating effect Effects 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229910052738 indium Inorganic materials 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 230000004807 localization Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000002557 mineral fiber Substances 0.000 description 1
- 239000011490 mineral wool Substances 0.000 description 1
- 238000009740 moulding (composite fabrication) Methods 0.000 description 1
- 239000010451 perlite Substances 0.000 description 1
- 235000019362 perlite Nutrition 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 229910052895 riebeckite Inorganic materials 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Landscapes
- Panels For Use In Building Construction (AREA)
- Producing Shaped Articles From Materials (AREA)
- Press-Shaping Or Shaping Using Conveyers (AREA)
- Devices For Post-Treatments, Processing, Supply, Discharge, And Other Processes (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は外装材等の建築材料とし
て用いられる無機質セメント板の製造方法に関するもの
である。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing an inorganic cement board used as a building material such as an exterior material.
【０００２】[0002]
【従来の技術】従来から、無機質セメント板は、ハチェ
ック抄造法または長網抄造法等の抄造方式か、或いは押
出成形か注型成形かのいずれかの方式で製造されてい
る。このうち、抄造方式による無機質セメント板の製造
方法が生産性に優れているために一般によく行われてい
るが、この抄造方式によって形成されたグリーンシート
を成形プレス機で加圧成形して凹凸模様を付与した後、
養生硬化して得られる無機質セメント板の表面には、深
く鋭い凹凸模様を形成することが困難であるという欠点
があった。その理由は、抄造によって形成された直後の
グリーンシートは含水率が高いために付与された凹凸模
様が型崩れするからである。この欠点を解消するため
に、上記グリーンシートを第１層として、その上面にセ
メントを主成分とする流動性に乏しい、含水率が約５０
重量％以下のペースト状の粉体混合材料を載せて第２層
を形成して複層板とし、この複層板を成形プレス機で加
圧成形してこの第２層に所望の凹凸模様を形成し、これ
を養生硬化する方法が採用された。ところが、この複層
板を成形プレス機で加圧成形して第２層に所望の凹凸模
様を形成する際において、成形プレス機の金型への粉体
混合材料の付着が発生する。金型に粉体混合材料が付着
すると、以降に成形された複層板の凹凸模様の表面が粗
雑になるという問題があった。この粉体混合材料の金型
への付着を防止するために、金型に離型油を塗布して成
形を行っていたが、この方法では、成形後の複層板表面
に離型油が付着して、養生硬化させた無機質セメント板
にも残留し、例えば該無機質セメント板に塗料で着色す
る場合に、この塗料のはじき、或いは塗膜の剥離を生じ
易いという問題があった。2. Description of the Related Art Conventionally, an inorganic cement board has been manufactured by a paper-making method such as a Haschek paper-making method or a Fourdrinier-paper-making method, or an extrusion molding method or a cast molding method. Among them, the method for producing an inorganic cement board by the papermaking method is generally well performed because of its excellent productivity, but the green sheet formed by this papermaking method is subjected to pressure molding with a molding press machine to obtain an uneven pattern. After granting
There is a drawback in that it is difficult to form a deep and sharp uneven pattern on the surface of the inorganic cement board obtained by curing and hardening. The reason for this is that the green sheet immediately after being formed by papermaking has a high water content, and therefore the uneven pattern imparted thereto loses its shape. In order to solve this drawback, the above green sheet is used as the first layer, and the upper surface thereof has cement as a main component and has poor fluidity and a water content of about 50.
A second layer is formed by placing a powdery material mixture in the form of paste in an amount of not more than wt% to form a multi-layer plate, and the multi-layer plate is pressure-molded by a molding press machine to form a desired uneven pattern on the second layer. A method of forming and curing and curing this was adopted. However, when this multi-layer plate is pressure-molded by a molding press machine to form a desired uneven pattern on the second layer, adhesion of the powder mixed material to the mold of the molding press machine occurs. When the powder mixed material adheres to the mold, there is a problem that the surface of the uneven pattern of the multilayer plate formed thereafter becomes rough. In order to prevent the powder mixed material from adhering to the mold, mold oil was applied and molded, but in this method, mold oil was not formed on the surface of the multilayer plate after molding. There is a problem that it adheres and remains on the cured and cured inorganic cement board, and when the inorganic cement board is colored with a paint, for example, the paint is repelled or the coating film is easily peeled off.
【０００３】[0003]
【発明が解決しようとする課題】本発明は、上述の如
く、セメントと骨材と繊維成分を主成分とした水性スラ
リーを抄造してグリーンシートを形成し、このグリーン
シートを第１層としてその上面に、セメントと骨材と繊
維成分を主成分とする、含水率が５０重量％以下のペー
スト状の粉体混合材料を載せて第２層を形成して複層板
とし、この複層板を成形プレス機で加圧成形して上記第
２層の上面に凹凸模様を形成し、さらに養生硬化させる
ことを特徴とする無機質セメント板の製造方法を採用す
るに当たって、成形プレス機の金型に粉体混合材料が付
着しない無機質セメント板の製造方法を提供するもので
ある。DISCLOSURE OF THE INVENTION The present invention, as described above, forms a green sheet by making an aqueous slurry containing cement, aggregate and fiber components as main components, and uses this green sheet as the first layer. On the upper surface, a paste-like powder mixed material containing cement, aggregate, and fiber components as main components and having a water content of 50% by weight or less is placed to form a second layer to form a multi-layer board. When a method for producing an inorganic cement board is used, in which a concavo-convex pattern is formed on the upper surface of the second layer by pressure molding with a molding press, and then curing is carried out, a mold of the molding press is used. It is intended to provide a method for producing an inorganic cement board on which a powder mixed material does not adhere.
【０００４】[0004]
【課題を解決するための手段】本発明の無機質セメント
板の製造方法は、セメントと骨材と繊維成分を主成分と
した水性スラリーを抄造してグリーンシートを形成し、
このグリーンシートを第１層としてその上面に、セメン
トと骨材と繊維成分を主成分とする、含水率が５０重量
％以下のペースト状の粉体混合材料を載せて第２層を形
成して複層板とし、この複層板の第２層の上面に、上記
粉体混合材料を凝集する凝集剤を含んだ水溶液を０．１
リットル／ｍ2 を越えて散布した後、上記複層板を加圧
成形して第２層の上面に凹凸模様を形成し、養生硬化さ
せることを特徴とする。Means for Solving the Problems A method for producing an inorganic cement board of the present invention comprises forming an aqueous slurry containing cement, an aggregate and a fiber component as main components to form a green sheet,
This green sheet is used as a first layer, and a paste-like powder mixed material containing cement, aggregate and fiber components as main components and having a water content of 50% by weight or less is placed on the upper surface to form a second layer. A multi-layer plate is prepared. On the upper surface of the second layer of the multi-layer plate, 0.1% of an aqueous solution containing an aggregating agent for aggregating the powder mixed material is formed.
After spraying over 1 liter / m 2 , the multi-layer plate is pressure-molded to form an uneven pattern on the upper surface of the second layer, and is cured and cured.
【０００５】[0005]
【作用】本発明の無機質セメント板の製造方法による
と、複層板の上面に粉体混合材料を載せて形成した第２
層に、この粉体混合材料を凝集する凝集剤を０．１リッ
トル／ｍ2 を越えて散布すると、骨材及び繊維成分とセ
メントとがこの凝集剤によって凝集されてそれぞれが分
離しにくくなる。したがって、第２層に凝集剤を散布し
た後、成形プレス機で該複層板の第２層に凹凸模様を形
成すると、成形プレス機の金型に粉体混合材料が付着し
なくなる。According to the method for producing an inorganic cement board of the present invention, the second method is one in which the powder mixed material is placed on the upper surface of the multi-layer board.
When a coagulant for coagulating the powder mixed material is sprayed over the layer in an amount of more than 0.1 liter / m 2 , aggregates and fiber components and cement are coagulated by the coagulant and it becomes difficult to separate them. Therefore, if the concavo-convex pattern is formed on the second layer of the multilayer plate by the molding press after the coagulant is sprayed on the second layer, the powder mixed material does not adhere to the mold of the molding press.
【０００６】以下、本発明を詳しく説明する。まず、加
圧成形される複層板について説明すると、複層板は第１
層とこの第１層に載った第２層から構成される。第１層
は、セメントをバインダーとし、骨材、その他補強のた
めに各種繊維成分を主成分として含んだ水性スラリーを
抄造して得られるグリーンシートで構成される。上記セ
メントとしては、ポルトランドセメント、高炉セメント
等、フライアッシュセメント等を用いることができる。
上記骨材としては特に限定はなく、目的とする無機質セ
メント板の用途に応じて一般に用いられる鉱物性骨材が
用いられる。例えば、建築材料の外装板に適用する場合
には、ケイ石粉、パーライト、シラスバルーン、ガラス
バルーン、シリカ、砂利などが用いられる。上記繊維成
分としては、セルロース系のパルプ繊維、石綿等の鉱物
性繊維、ポリプロピレン、ビニロン等有機質の樹脂系繊
維、ガラス繊維、炭素繊維、金属繊維等が用いられる。
上記第１層は第２層と比べると、含水率がきわめて高
く、仮に凹凸模様を加圧成形で付与しても、解圧すると
経時とともに型崩れする性質を有するものである。The present invention will be described in detail below. First, the multi-layer plate to be pressure-molded will be described.
It is composed of a layer and a second layer on the first layer. The first layer is composed of a green sheet obtained by making an aqueous slurry containing cement as a binder and various fiber components as main components for reinforcement. As the cement, Portland cement, blast furnace cement, fly ash cement or the like can be used.
The above-mentioned aggregate is not particularly limited, and a mineral aggregate generally used depending on the intended use of the inorganic cement board is used. For example, when applied to the exterior plate of a building material, silica stone powder, perlite, shirasu balloon, glass balloon, silica, gravel, etc. are used. As the fiber component, cellulose-based pulp fiber, mineral fiber such as asbestos, organic resin fiber such as polypropylene and vinylon, glass fiber, carbon fiber, metal fiber and the like are used.
The first layer has an extremely high water content as compared with the second layer, and even if a concavo-convex pattern is applied by pressure molding, the first layer has a property of losing its shape over time when decompressed.
【０００７】上記第２層について説明すると、材料面か
ら言及すると基本的には差異はなく、セメント、骨材、
繊維成分を主成分とし、含水率が５０重量％以下であっ
て、凹凸模様を付与すると、解圧しても凹凸模様の崩れ
はなく、けいじょうの自己保持性に優れた性質をもっ
た、混練されたペースト状の粉体混合材料が用いられ
る。この混練された粉体混合材料を第１層のグリーンシ
ート上にノズルから供給して第２層を形成し、その結
果、複層板が形成される。Explaining the above-mentioned second layer, there is basically no difference in terms of materials, cement, aggregate,
Kneading with a fiber component as the main component, a water content of 50% by weight or less, and when an uneven pattern is imparted, the uneven pattern does not collapse even when decompressed, and the kneading has excellent self-holding properties. The pasty powdered mixed material is used. The kneaded powder mixed material is supplied from the nozzle onto the green sheet of the first layer to form the second layer, and as a result, the multilayer plate is formed.
【０００８】この複層板の第２層の上面に、上記粉体混
合材料を凝集する凝集剤を含んだ水溶液を０．１リット
ル／ｍ2 を越えた量で散布する。この凝集剤としては、
上記粉体混合材料を凝集するものであれば特に限定はし
ないが、例えば、アニオン系ポリアクリルアミド等の高
分子凝集剤を用いるとよい。上記水溶液の散布量が０．
１リットル／ｍ2 以下であると、成形プレス機の金型へ
の上記粉体混合材料の付着が十分に防止できない。上記
水溶液の散布量が０．１リットル／ｍ2 を越えた量であ
ると金型への上記粉体混合材料の付着が防止できるもの
であるが、散布量が多すぎると、複層板から水溶液が流
れ出て、同時に上記粉体混合材料に含まれるセメントの
一部も流れ出てしまう。さらに次の工程で加圧成形して
付与される凹凸模様が型崩れを起こすので、散布量は１
０リットル／ｍ2 未満にすることが好ましい。さらに、
複層板の第２層上面に加圧成形によって深く鋭い凹凸模
様を形成することを考慮すると、上記水溶液の散布量
は、０．３リットル／ｍ2 以上３リットル／ｍ2 以下で
あることがより好ましい。また、上記水溶液中に含まれ
る凝集剤の濃度は、０．０１重量％以上０．２重量％未
満であることが好ましく、より好ましくは０．０５重量
％以上０．１５重量％いかであることが好ましい。水溶
液中の凝集剤濃度が０．２重量％以上であると、上記粉
体混合材料の凝集が極在化して、養生硬化後の無機質セ
メント板に外観ムラが発生する。On the upper surface of the second layer of this multi-layer plate, an aqueous solution containing an aggregating agent for aggregating the powder mixture material is sprayed in an amount exceeding 0.1 liter / m 2 . As this coagulant,
There is no particular limitation as long as it can agglomerate the powder mixed material, but for example, a polymer aggregating agent such as anionic polyacrylamide may be used. The amount of the above aqueous solution sprayed was 0.
If it is 1 liter / m 2 or less, the adhesion of the powder mixture material to the mold of the molding press cannot be sufficiently prevented. If the amount of the above-mentioned aqueous solution sprayed exceeds 0.1 liter / m 2 , adhesion of the above-mentioned powder mixed material to the mold can be prevented, but if the amount of sprayed too much, the multilayer plate will The aqueous solution flows out, and at the same time, part of the cement contained in the powder mixed material also flows out. Furthermore, the unevenness pattern applied by pressure molding in the next step causes the shape to collapse, so the amount of spray is 1
It is preferably less than 0 liter / m 2 . further,
Considering that a deep and sharp concave-convex pattern is formed on the upper surface of the second layer of the multilayer plate by pressure molding, the spray amount of the aqueous solution is 0.3 liter / m 2 or more and 3 liter / m 2 or less. More preferable. The concentration of the aggregating agent contained in the aqueous solution is preferably 0.01% by weight or more and less than 0.2% by weight, more preferably 0.05% by weight or more and 0.15% by weight. Is preferred. When the concentration of the coagulant in the aqueous solution is 0.2% by weight or more, the coagulation of the powder mixed material is localized and uneven appearance occurs on the inorganic cement board after curing and curing.
【０００９】上述の如く凝集剤を含んだ水溶液を第２層
上面に散布した複層板を成形プレス機で加圧成形して第
２層に凹凸模様を形成する。これをさらに養生硬化させ
て水硬反応を水硬反応させる。上記の養生方法は、湿熱
状態で行う蒸気養生のみで行うものであっても、この蒸
気養生した後さらにオートクレーブ中で加熱して行うオ
ートクレーブ養生であってもよい。上記蒸気養生は、５
０℃以上の飽和水蒸気で満たされた養生室に放置してな
される。上記養生工程を経て、無機質セメント板が得ら
れる。ここで、本発明の無機質セメント板の製造方法
は、水溶液を粉体混合材料からなる第２層に散布してい
るので、複層板の第１層と第２層との含水率の差が縮小
されており、したがって、養生工程における第１層と第
２層との水硬反応の反応速度の差に起因する、無機質セ
メント板の反りを改善する効果も有している。As described above, the multi-layer plate in which the aqueous solution containing the aggregating agent is sprayed on the upper surface of the second layer is pressure-molded by a molding press to form an uneven pattern on the second layer. This is further cured and cured to cause a hydraulic reaction. The above curing method may be performed only by steam curing performed in a wet heat state, or may be autoclave curing performed by further heating in an autoclave after steam curing. The steam curing is 5
It is done by leaving it in a curing room filled with saturated steam at 0 ° C or higher. An inorganic cement board is obtained through the curing step. Here, in the method for producing an inorganic cement board of the present invention, since the aqueous solution is sprayed on the second layer made of the powder mixed material, the difference in water content between the first layer and the second layer of the multi-layer board is Therefore, it has the effect of improving the warp of the inorganic cement board due to the difference in the reaction rate of the hydraulic reaction between the first layer and the second layer in the curing step.
【００１０】[0010]
【実施例】以下、本発明を実施例として説明する。EXAMPLES The present invention will be described below with reference to examples.
【００１１】実施例及び比較例に用いるグリーンシー
トの作製 ポルトランドセメント３０重量％、フライアッシュセメ
ント３０重量％、高炉水砕スラグ３０重量％、ロックウ
ール５重量％、及びパルプ５重量％を水に分散させて水
性スラリーを調製し、この水性スラリーを長網抄造法に
て抄造してグリーンシートを作製した。このグリーンシ
ートを実施例及び比較例に用いた。Preparation of Green Sheets Used in Examples and Comparative Examples Portland cement 30% by weight, fly ash cement 30% by weight, granulated blast furnace slag 30% by weight, rock wool 5% by weight, and pulp 5% by weight were dispersed in water. Then, an aqueous slurry was prepared, and this aqueous slurry was made into paper by a Fourdrinier paper making method to prepare a green sheet. This green sheet was used in Examples and Comparative Examples.
【００１２】実施例１及び比較例１に用いる粉体混合
材料の調製 ポルトランドセメント３０重量％、着色砂６８重量％、
及びパルプ２重量％を水と混合し、含水率が約４０重量
％のペースト状の粉体混合材料を調製した。Preparation of powder mixed material used in Example 1 and Comparative Example 1 Portland cement 30% by weight, colored sand 68% by weight,
And 2% by weight of pulp were mixed with water to prepare a pasty powdery mixed material having a water content of about 40% by weight.
【００１３】実施例１乃至実施例５、及び比較例３ 上述の如くして得たグリーンシートを第１層として、こ
のグリーンシートの上面に上記粉体混合材料をノズルか
ら供給して第２層を形成し、複層板を得た。この複層板
の第２層上面に、アニオン系ポリアクリルアミドを所定
濃度に調製して溶解した水溶液を均一に所定量散布した
後、この複層板を成形プレス機にて加圧成形して上記第
２層に凹凸模様を形成し、これを８０℃の湿熱状態に保
たれた養生室で１００時間放置して蒸気養生を施し無機
質セメント板を得た。各実施例及び比較例３における上
記水溶液の散布量、及び濃度を（表１）に示した。Examples 1 to 5 and Comparative Example 3 The green sheet obtained as described above is used as the first layer, and the powder mixture material is supplied from the nozzle to the upper surface of the green sheet to form the second layer. Was formed to obtain a multilayer board. On the upper surface of the second layer of the multi-layer board, an aqueous solution of anionic polyacrylamide prepared in a predetermined concentration and dissolved was sprayed uniformly in a predetermined amount, and then the multi-layer board was pressure-molded by a molding press machine and An uneven pattern was formed on the second layer, and this was left for 100 hours in a curing room kept in a wet heat condition of 80 ° C. for steam curing to obtain an inorganic cement board. The amount and concentration of the aqueous solution sprayed in each Example and Comparative Example 3 are shown in (Table 1).
【００１４】比較例１ 上述の如くして得たグリーンシートを第１層として、こ
のグリーンシートの上面に上記粉体混合材料をノズルか
ら供給して第２層を形成し、複層板を得た。この複層板
の第２層上面に、水を均一に１リットル／ｍ2 散布した
後、この複層板を成形プレス機にて加圧成形して上記第
２層に凹凸模様を形成し、これを８０℃の湿熱状態に保
たれた養生室で１００時間放置して蒸気養生を施し無機
質セメント板を得た。Comparative Example 1 The green sheet obtained as described above was used as a first layer, and the powder mixture material was supplied from the nozzle to the upper surface of this green sheet to form a second layer to obtain a multilayer plate. It was Water was evenly sprayed at 1 liter / m 2 on the upper surface of the second layer of the multi-layer board, and then the multi-layer board was pressure-molded by a molding press to form an uneven pattern on the second layer. This was left for 100 hours in a curing room kept in a humid heat condition of 80 ° C. for steam curing to obtain an inorganic cement board.
【００１５】比較例２ 上述の如くして得たグリーンシートを第１層として、こ
のグリーンシートの上面に上記粉体混合材料をノズルか
ら供給して第２層を形成し、複層板を得た。この複層板
を成形プレス機にて加圧成形して上記第２層に凹凸模様
を形成し、これを８０℃の湿熱状態に保たれた養生室で
１００時間放置して蒸気養生を施し無機質セメント板を
得た。Comparative Example 2 The green sheet obtained as described above was used as a first layer, and the powder mixture material was supplied to the upper surface of this green sheet from a nozzle to form a second layer to obtain a multilayer plate. It was This multi-layer plate is pressure-molded by a molding press to form a concavo-convex pattern on the second layer, and this is left in a curing room kept at 80 ° C for 100 hours for steam curing to obtain an inorganic substance. A cement board was obtained.
【００１６】金型への粉体混合材料の付着有無の評価 上述の如くして得た実施例及び比較例の無機質セメント
板の凹凸模様の形成工程で用いた成形プレス機の金型に
ついて、それぞれ寸法３００ｍｍ×３００ｍｍあたり
の、該金型への粉体混合材料の付着箇所をカウントし
た。この結果を（表１）に示した。Evaluation of Presence or Absence of Adhesion of Powder Mixture Material to Mold The mold of the molding press machine used in the step of forming the uneven pattern of the inorganic cement plates of Examples and Comparative Examples obtained as described above, respectively. The number of places where the powder mixed material adhered to the mold per 300 mm × 300 mm dimension was counted. The results are shown in (Table 1).
【００１７】[0017]
【表１】 [Table 1]
【００１８】表１を見てわかるように、アニオン系ポリ
アクリルアミドを溶解した水溶液を０．１リットル／ｍ
2 を越えて散布した実施例においては、金型への粉体混
合材料の付着が認められなかった。しかし、上記水溶液
を散布した場合でも、０．１リットル／ｍ2 しか散布し
なかった比較例３では、金型への粉体混合材料の付着が
２箇所認められた。したがって、実施例においては、金
型への粉体混合材料の付着が防止されているといえる。As can be seen from Table 1, an aqueous solution in which anionic polyacrylamide is dissolved is 0.1 liter / m 2.
In the examples sprayed over 2 , no adhesion of the powder mixed material to the mold was observed. However, even when the above aqueous solution was sprayed, in Comparative Example 3 in which only 0.1 liter / m 2 was sprayed, adhesion of the powder mixed material to the mold was observed at two locations. Therefore, in the examples, it can be said that the powder mixed material is prevented from adhering to the mold.
【００１９】但し、水溶液を１０リットル／ｍ2 散布し
た実施例４では、得られた無機質セメント板の凹凸模様
が型崩れを起こしており、水溶液中のアニオン系ポリア
クリルアミドの濃度が０．２重量％であった実施例５で
は、得られた無機質セメント板の外観に粉体混合材料の
極在化に起因したムラが生じていた。However, in Example 4 in which the aqueous solution was sprayed at 10 liters / m 2 , the irregular pattern of the obtained inorganic cement plate had lost its shape, and the concentration of the anionic polyacrylamide in the aqueous solution was 0.2% by weight. % In Example 5, unevenness due to the localization of the powder mixed material was generated in the appearance of the obtained inorganic cement plate.
【００２０】[0020]
【発明の効果】本発明の無機質セメント板の製造方法に
よると、セメントと骨材と繊維成分を主成分とした水性
スラリーを抄造してグリーンシートを形成し、このグリ
ーンシートを第１層としてその上面に、セメントと骨材
と繊維成分を主成分とする、含水率が５０重量％以下の
ペースト状の粉体混合材料を載せて第２層を形成して複
層板とし、この複層板を成形プレス機で加圧成形して上
記第２層の上面に凹凸模様を形成し、さらに養生硬化さ
せることを特徴とする無機質セメント板の製造方法を採
用するに当たって、上記複層板を加圧成形する前に、上
記粉体混合材料を凝集する凝集剤を含んだ水溶液を０．
１リットル／ｍ2 を越えて散布するので、成形プレス機
の金型に粉体混合材料が付着しないAccording to the method for producing an inorganic cement board of the present invention, an aqueous slurry containing cement, aggregate and fiber components as main components is formed into a green sheet, and the green sheet is used as the first layer. On the upper surface, a paste-like powder mixed material containing cement, aggregate, and fiber components as main components and having a water content of 50% by weight or less is placed to form a second layer to form a multi-layer board. In the method for producing an inorganic cement board, which comprises press-molding the above with a molding press machine to form an uneven pattern on the upper surface of the second layer, and further curing and curing, pressing the above-mentioned multi-layer board. Before molding, an aqueous solution containing an aggregating agent for aggregating the above powder mixed material was used.
Since it sprays over 1 liter / m 2 , powder mixed material does not adhere to the mold of the molding press.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ｅ０４Ｃ 2/04 Ｄ 7806−2Ｅ ─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 6 Identification code Internal reference number FI technical display location E04C 2/04 D 7806-2E
Claims (3)
た水性スラリーを抄造してグリーンシートを形成し、こ
のグリーンシートを第１層としてその上面に、セメント
と骨材と繊維成分を主成分とする、含水率が５０重量％
以下のペースト状の粉体混合材料を載せて第２層を形成
して複層板とし、この複層板の第２層の上面に、上記粉
体混合材料を凝集する凝集剤を含んだ水溶液を０．１リ
ットル／ｍ2 を越えて散布した後、上記複層板を加圧成
形して第２層の上面に凹凸模様を形成し、養生硬化させ
ることを特徴とする無機質セメント板の製造方法。1. A green sheet is formed by making an aqueous slurry containing cement, aggregate and fiber components as main components, and the green sheet is used as a first layer on the upper surface of which cement, aggregate and fiber components are mainly contained. Moisture content of 50% by weight
The following paste-like powder mixed material is placed to form a second layer to form a multilayer plate, and an aqueous solution containing an aggregating agent for aggregating the powder mixed material on the upper surface of the second layer of the multilayer plate. Of 0.1 liter / m 2 or more, and then the above-mentioned multi-layer board is pressure-molded to form an uneven pattern on the upper surface of the second layer, and curing is carried out to produce an inorganic cement board. Method.
有される凝集剤の濃度が０．０１重量％以上０．２重量
％未満であることを特徴とする請求項１又は請求項２記
載の無機質セメント板の製造方法。2. The concentration of the aggregating agent contained in the aqueous solution sprayed on the upper surface of the second layer is 0.01% by weight or more and less than 0.2% by weight. A method for producing the described inorganic cement board.
が、１０リットル／ｍ2 未満であることを特徴とする請
求項３記載の無機質セメント板の製造方法。3. The method for producing an inorganic cement board according to claim 3, wherein the amount of the aqueous solution sprayed on the upper surface of the second layer is less than 10 liter / m 2 .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP990394A JPH07214532A (en) | 1994-01-31 | 1994-01-31 | Manufacture of inorganic cement board |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP990394A JPH07214532A (en) | 1994-01-31 | 1994-01-31 | Manufacture of inorganic cement board |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH07214532A true JPH07214532A (en) | 1995-08-15 |
Family
ID=11733082
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP990394A Withdrawn JPH07214532A (en) | 1994-01-31 | 1994-01-31 | Manufacture of inorganic cement board |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07214532A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10311120A (en) * | 1997-05-12 | 1998-11-24 | Juken Sangyo Co Ltd | Molded construction material and manufacture thereof |
-
1994
- 1994-01-31 JP JP990394A patent/JPH07214532A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10311120A (en) * | 1997-05-12 | 1998-11-24 | Juken Sangyo Co Ltd | Molded construction material and manufacture thereof |
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