JPH08231261A - Production of calcium silicate plate - Google Patents
Production of calcium silicate plateInfo
- Publication number
- JPH08231261A JPH08231261A JP14070095A JP14070095A JPH08231261A JP H08231261 A JPH08231261 A JP H08231261A JP 14070095 A JP14070095 A JP 14070095A JP 14070095 A JP14070095 A JP 14070095A JP H08231261 A JPH08231261 A JP H08231261A
- Authority
- JP
- Japan
- Prior art keywords
- raw material
- weight
- calcium silicate
- starting material
- hydrothermal reaction
- 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
Links
Classifications
-
- 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
- C04B28/18—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 mixtures of the silica-lime type
- C04B28/186—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 mixtures of the silica-lime type containing formed Ca-silicates before the final hardening step
-
- 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
- C04B2111/40—Porous or lightweight materials
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、珪酸カルシウム板の製
造方法に関し、更に詳細には軽量(例えば嵩比重１.０以
下)珪酸カルシウム板の製造方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a calcium silicate plate, and more particularly to a method for producing a lightweight (eg bulk specific gravity of 1.0 or less) calcium silicate plate.
【０００２】[0002]
【従来の技術】従来、珪酸カルシウム板は、軽量で、優
れた加工性及び寸法安定性を持ち、更に不燃性であると
いう特徴を有し、建築材料として主に内装用に広く使用
されている。このような珪酸カルシウム板の成形法とし
て、抄造法、プレスモールド法及び単層成形法等が利用
され、石灰質原料、珪酸質原料、繊維質原料及び無機充
填材を含有してなる原料スラリーから成形された成形体
を、通常は圧力容器内で飽和水蒸気により反応硬化する
ことにより珪酸カルシウム板が製造されている。2. Description of the Related Art Conventionally, calcium silicate board is lightweight, has excellent workability and dimensional stability, and is characterized by being nonflammable, and has been widely used mainly as a building material for interiors. . As a forming method of such a calcium silicate plate, a papermaking method, a press molding method, a single layer forming method or the like is used, and it is formed from a raw material slurry containing a calcareous raw material, a siliceous raw material, a fibrous raw material and an inorganic filler. A calcium silicate plate is manufactured by subjecting the formed body to reaction hardening usually with saturated steam in a pressure vessel.
【０００３】[0003]
【発明が解決しようとする課題】しかし、特に抄造法に
おいて、軽量珪酸カルシウム板を製造する場合には、水
熱反応前の成形体(グリーンシート)の強度が弱く、ま
た、含有水分量が多いため、水熱反応中に余剰水の熱膨
張が生じたり、蒸気圧が高くなり、層間剥離やパンクと
言った問題が生ずることがある。However, particularly in the case of producing a lightweight calcium silicate plate in the papermaking method, the strength of the green body before the hydrothermal reaction is weak and the water content is large. Therefore, thermal expansion of surplus water may occur during the hydrothermal reaction, or the vapor pressure may increase, causing problems such as delamination and puncture.
【０００４】これらの問題を防止するため、成形後にプ
レスを行い、その後に水熱反応を行ったり、水熱反応中
にターンバックルを用いて締め付けるという方法が行わ
れているが、これらの方法を講ずると嵩比重が高くなっ
たり、製造に人手が掛かるといった欠点があった。In order to prevent these problems, a method of pressing after molding and then performing hydrothermal reaction or tightening with a turnbuckle during the hydrothermal reaction is performed. These methods are used. If it is taken, there are drawbacks such as a high bulk specific gravity and labor required for manufacturing.
【０００５】また、特開平６−287083号公報に示されて
いる余剰水の除去方法もあるが、特殊な圧力容器あるい
は蒸気の過熱器を必要とするため一般的な方法とは言え
ない。There is also a method for removing surplus water disclosed in Japanese Patent Laid-Open No. 6-287083, but it cannot be said to be a general method because a special pressure vessel or steam superheater is required.
【０００６】従って、本発明の目的は、石灰質原料との
反応性が良い原料を使用し、水熱反応の前に、１次養生
を行い、成形体(グリーンシート)の強度を向上すること
により、上述の欠点を解決し、水熱反応中に剥離やパン
クを生ずることがない軽量珪酸カルシウム板の製造方法
を提供することにある。Therefore, an object of the present invention is to improve the strength of a molded body (green sheet) by using a raw material having a good reactivity with a calcareous raw material and performing primary curing before the hydrothermal reaction. An object of the present invention is to provide a method for manufacturing a lightweight calcium silicate plate that solves the above-mentioned drawbacks and does not cause peeling or puncture during hydrothermal reaction.
【０００７】[0007]
【課題を解決するための手段】即ち、本発明は、固形分
として石灰質原料１７〜５０重量％、珪酸質原料１５〜
４５重量％、繊維質原料２〜８重量％及び無機質充填材
５〜４０重量％を含有してなる原料スラリーを所定の形
状に成形後、得られた成形体を圧力容器内で水熱反応さ
せることからなる軽量珪酸カルシウム板の製造方法にお
いて、珪酸質原料の一部として比表面積が１ｍ2／ｇ以
上の非晶質珪酸原料または珪酸塩原料の１種または２種
以上を２〜２０重量％使用し、且つ成形体を水熱反応さ
せる前に、成形体を(養生温度−１５)×養生時間＝１２
０℃・時間以上となる条件下で１次養生することを特徴
とする軽量珪酸カルシウム板(以下、単に「珪酸カルシ
ウム板」と記載する)の製造方法を提供することにあ
る。That is, according to the present invention, the calcareous raw material is 17 to 50% by weight and the siliceous raw material 15 to 15
After forming a raw material slurry containing 45% by weight, 2 to 8% by weight of a fibrous raw material and 5 to 40% by weight of an inorganic filler into a predetermined shape, the obtained molded body is hydrothermally reacted in a pressure vessel. In the method for producing a lightweight calcium silicate plate consisting of 2 to 20% by weight of one or two or more types of amorphous silicic acid raw material or silicate raw material having a specific surface area of 1 m 2 / g or more as a part of siliceous raw material. Before using and hydrothermally reacting the molded body, the molded body is (curing temperature-15) x curing time = 12
It is an object of the present invention to provide a method for producing a lightweight calcium silicate plate (hereinafter simply referred to as “calcium silicate plate”), which is characterized by primary curing at a temperature of 0 ° C./hour or more.
【０００８】[0008]
【作用】本発明の珪酸カルシウム板の製造方法に使用さ
れる原料スラリーの基本組成は、固形分として石灰質原
料１７〜５０重量％、珪酸質原料１５〜４５重量％、繊
維質原料２〜８重量％及び無機質充填材５〜４０重量％
を含有してなる慣用のものである。The basic composition of the raw material slurry used in the method for producing a calcium silicate plate of the present invention is such that the solid content is 17 to 50% by weight of calcareous raw material, 15 to 45% by weight of siliceous raw material, and 2 to 8% by weight of fibrous raw material. % And inorganic filler 5 to 40% by weight
It is a conventional one containing.
【０００９】ここで、石灰質原料としては、例えば消石
灰、生石灰等を使用することができる。なお、石灰質原
料の配合量が１７重量％未満であったり、５０重量％を
超えると曲げ強度が低く、吸水による寸法変化率が大き
くなるために好ましくない。Here, as the calcareous raw material, for example, slaked lime, quick lime or the like can be used. If the blending amount of the calcareous raw material is less than 17% by weight or exceeds 50% by weight, the bending strength is low and the dimensional change rate due to water absorption is large, which is not preferable.
【００１０】また、珪酸質原料としては、例えば珪砂、
フライアッシュ等を使用することができる。なお、珪酸
質原料の配合量が１５重量％未満であったり、４５重量
％を超えると曲げ強度が低く、吸水による寸法変化率が
大きくなるために好ましくない。As the siliceous raw material, for example, silica sand,
Fly ash or the like can be used. If the content of the siliceous raw material is less than 15% by weight or exceeds 45% by weight, the bending strength is low and the rate of dimensional change due to water absorption becomes large, which is not preferable.
【００１１】更に、繊維質原料としては、例えばセルロ
ース繊維、ポリプロピレン、ビニロン、ガラスファイバ
ー、カーボンファイバー等を使用することができる。な
お、繊維質原料の配合量が２重量％未満であると、曲げ
強度が低くなるために好ましくなく、また、８重量％を
超えると不燃性でなくなるために好ましくない。なお、
ポリプロピレン、ビニロン、ガラスファイバー、カーボ
ンファイバー等を使用する場合、それらの配合量は５重
量％以下とする必要がある。Further, as the fibrous raw material, for example, cellulose fiber, polypropylene, vinylon, glass fiber, carbon fiber or the like can be used. If the content of the fibrous raw material is less than 2% by weight, the bending strength will be low, and if it exceeds 8% by weight, it will not be nonflammable, which is not preferable. In addition,
When polypropylene, vinylon, glass fiber, carbon fiber, etc. are used, their blending amount must be 5% by weight or less.
【００１２】また、無機質充填材としては、例えばパー
ライト、ウォラストナイト、マイカ、タルク、炭酸カル
シウム、石膏等を使用することができる。なお、無機質
充填材の配合量が５重量％未満であると、吸水による寸
法変化率が大きくなるために好ましくなく、また、４０
重量％を超えると曲げ強度が低下するために好ましくな
い。As the inorganic filler, for example, perlite, wollastonite, mica, talc, calcium carbonate, gypsum, etc. can be used. If the blending amount of the inorganic filler is less than 5% by weight, the dimensional change rate due to water absorption increases, which is not preferable.
If it exceeds 5% by weight, the bending strength decreases, which is not preferable.
【００１３】本発明方法の第１の特徴は、上述のような
成分配合を有する原料スラリーの珪酸質原料の一部とし
て比表面積１ｍ2／ｇ以上の非晶質珪酸原料または珪酸
塩原料を使用することにある。ここで、本明細書に記載
する「比表面積」は、Ｎ2ガス吸着法により測定したも
のを言う。非晶質珪酸原料または珪酸塩原料の比表面積
が１ｍ2／ｇ未満であると、反応性が悪く、水熱反応前
にグリーンシートに充分な強度を付与することができな
いために好ましくない。The first feature of the method of the present invention is to use an amorphous silicic acid raw material or a silicate raw material having a specific surface area of 1 m 2 / g or more as a part of the siliceous raw material of the raw material slurry having the above-mentioned composition. To do. Here, the “specific surface area” described in the present specification means that measured by the N 2 gas adsorption method. If the specific surface area of the amorphous silicic acid raw material or the silicate raw material is less than 1 m 2 / g, reactivity is poor and sufficient strength cannot be imparted to the green sheet before the hydrothermal reaction, which is not preferable.
【００１４】また、比表面積１ｍ2／ｇ以上の非晶質珪
酸原料または珪酸塩原料の配合量は２〜２０重量％の範
囲内である。該配合量が２重量％未満では、強度発現性
が悪いために好ましくなく、また、２０重量％を超える
と、濾水性が低下し、生産効率が低下するために好まし
くない。なお、比表面積が１〜１０ｍ2／ｇの範囲内の
原料を使用する場合には、その配合量は１０重量％以上
が好ましく、１０〜１００ｍ2／ｇの範囲内の原料を使
用する場合には、その配合量は５重量％以上が好まし
く、１００ｍ2／ｇ以上の原料を使用する場合には、そ
の配合量は２重量％以上が好ましい。Further, the compounding amount of the amorphous silicic acid raw material or silicate raw material having a specific surface area of 1 m 2 / g or more is in the range of 2 to 20% by weight. When the content is less than 2% by weight, the strength development is poor, which is not preferable, and when it exceeds 20% by weight, drainage is lowered and production efficiency is lowered, which is not preferable. In the case where the specific surface area is to use a raw material in the range of 1 to 10 m 2 / g, the amount is preferably at least 10% by weight, when using raw materials in the range of 10 to 100 m 2 / g Is preferably 5% by weight or more, and when a raw material of 100 m 2 / g or more is used, the compounding amount is preferably 2% by weight or more.
【００１５】比表面積１ｍ2／ｇ以上の非晶質珪酸原料
としては例えば珪藻土、シリコンダスト、フライアッシ
ュ、ホワイトカーボン等を挙げることができる。また、
比表面積１ｍ2／ｇ以上の珪酸塩原料としては例えばゼ
オライト、パイロフィライト、アロフェン、モンモリロ
ナイト鉱物、緑泥石鉱物、アタパルジャイト等が挙げら
れる。なお、これらの原料は２種以上を併用することが
できる。Examples of the amorphous silicic acid raw material having a specific surface area of 1 m 2 / g or more include diatomaceous earth, silicon dust, fly ash and white carbon. Also,
Examples of the silicate raw material having a specific surface area of 1 m 2 / g or more include zeolite, pyrophyllite, allophane, montmorillonite mineral, chlorite mineral, attapulgite, and the like. Two or more of these raw materials can be used in combination.
【００１６】本発明方法の第２の特徴は、上述の原料配
合よりなる原料スラリーを例えば抄造法を使用して所定
の形状へ成形することにより得られたグリーンシート
(成形体)をそのまま水熱反応させるのではなく、１次養
生することにある。１次養生は、(養生温度−１５)×養
生時間＝１２０℃・時間以上となるような条件下で行
う。１次養生の条件が１２０℃・時間未満であると、養
生不足でグリーンシートに充分な強度を付与することが
できないために好ましくない。なお、１次養生は、１５
℃を超える養生温度を必要とし、３０〜８０℃の範囲内
の養生温度、２４０℃・時間以上の条件下で１次養生を
行うことが好ましい。The second feature of the method of the present invention is a green sheet obtained by forming a raw material slurry having the above-mentioned raw material mixture into a predetermined shape by using, for example, a papermaking method.
The purpose is not to subject the (molded body) to hydrothermal reaction as it is, but to carry out primary curing. The primary curing is performed under the condition of (curing temperature-15) x curing time = 120 ° C · hour or more. If the primary curing condition is less than 120 ° C./hour, the curing is insufficient and sufficient strength cannot be imparted to the green sheet, which is not preferable. The primary cure is 15
A curing temperature higher than 0 ° C is required, and it is preferable to perform the primary curing under conditions of a curing temperature in the range of 30 to 80 ° C and a temperature of 240 ° C / hour or more.
【００１７】上述のような１次養生を行った後のグリー
ンシートは、慣用の水熱反応条件下で水熱反応させ、そ
の後の慣用の工程を経て珪酸カルシウム板とすることが
できる。なお、水熱反応は、圧力容器中、飽和水蒸気下
で温度１５０〜２００℃、好ましくは１７０〜１９０℃
で、５〜２０時間、好ましくは８〜１２時間の条件下で
行うことができる。The green sheet after the above primary curing can be hydrothermally reacted under a conventional hydrothermal reaction condition, and can be made into a calcium silicate plate through the following conventional steps. The hydrothermal reaction is carried out in a pressure vessel under saturated steam at a temperature of 150 to 200 ° C, preferably 170 to 190 ° C.
At 5 to 20 hours, preferably 8 to 12 hours.
【００１８】[0018]
【実施例】以下に実施例及び比較例を挙げて本発明方法
の珪酸カルシウム板の製造方法を更に説明する。 実施例、比較例 消石灰、珪砂、ウォラストナイト、パーライト、パル
プ、非晶質珪酸原料及び珪酸塩原料を表１に示す割合で
配合し、１２倍の水で混合、撹拌した。更に、水を加え
て固形分濃度約３重量％の原料スラリーとし、６ｍｍの
厚さに抄造した。次に、表１に記載する温度、時間で１
次養生した後、圧力容器中、飽和水蒸気下で１８０℃、
１０時間の条件で水熱反応を行った。表１に、水熱反応
後のグリーンシートの剥離・パンクの有無、１次養生後
の曲げ強度、及び得られた珪酸カルシウム板の絶乾状態
での嵩比重並びに曲げ強度を示す。EXAMPLES The method for producing a calcium silicate plate according to the present invention will be further described below with reference to examples and comparative examples. Examples, Comparative Examples Slaked lime, silica sand, wollastonite, pearlite, pulp, amorphous silicic acid raw materials and silicate raw materials were mixed in the proportions shown in Table 1, mixed with 12 times water and stirred. Further, water was added to make a raw material slurry having a solid content concentration of about 3% by weight, and papermaking was performed to a thickness of 6 mm. Next, 1 at the temperature and time shown in Table 1.
After the next curing, 180 ℃ under saturated steam in a pressure vessel,
The hydrothermal reaction was carried out under the condition of 10 hours. Table 1 shows the presence or absence of peeling and puncture of the green sheet after the hydrothermal reaction, the bending strength after primary curing, and the bulk specific gravity and bending strength of the obtained calcium silicate plate in an absolutely dried state.
【００１９】[0019]
【表１】 [Table 1]
【００２０】表１中、珪藻土はＮ2ガス吸着法による比
表面積が２.０ｍ2／ｇのものであり、シリコンダストは
比表面積が２０ｍ2／ｇのものであり、ホワイトカーボ
ンは比表面積が２２０ｍ2／ｇのものであり、ゼオライ
トは比表面積が６.５ｍ2／ｇのものである。また、生産
性について、○印は良好を示し、×印は不良を示す。In Table 1, diatomaceous earth has a specific surface area of 2.0 m 2 / g by the N 2 gas adsorption method, silicon dust has a specific surface area of 20 m 2 / g, and white carbon has a specific surface area of 20 m 2 / g. is of 220 m 2 / g, zeolite are those specific surface area of 6.5m 2 / g. Regarding the productivity, the mark “◯” indicates good and the mark “×” indicates defective.
【００２１】[0021]
【発明の効果】以上のように、本発明の珪酸カルシウム
板の製造方法によれば、原料スラリーを所定の形状に成
形することにより得られたグリーンシートに強度を付与
することができ、それによって水熱反応中にグリーンシ
ートの剥離・パンク等を防止することができる。As described above, according to the method for producing a calcium silicate plate of the present invention, strength can be imparted to the green sheet obtained by forming the raw material slurry into a predetermined shape, and thereby the strength can be imparted. It is possible to prevent peeling and puncture of the green sheet during the hydrothermal reaction.
───────────────────────────────────────────────────── 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 Ｃ０４Ｂ 16:02 14:08 14:04 14:10 14:28） 111:40 (72)発明者 浅見 琢也 茨城県石岡市大字柏原６−１ 株式会社ア スク中央研究所内 (72)発明者 岩永 朋来 茨城県石岡市大字柏原６−１ 株式会社ア スク中央研究所内 (72)発明者 白本 盛光 茨城県石岡市大字柏原６−１ 株式会社ア スク中央研究所内 (72)発明者 小田 正章 茨城県石岡市大字柏原６−１ 株式会社ア スク中央研究所内─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 6 Identification code Internal reference number FI Technical indication C04B 16:02 14:08 14:04 14:10 14:28) 111: 40 (72) Inventor Takuya Asami 6-1, Kashiwara, Ishioka City, Ibaraki Prefecture, ASK Central Research Institute Co., Ltd. (72) Inventor Tomoki Iwanaga, 6-1, Kashiwara, Ishioka City, Ibaraki Prefecture 72 Central Research Institute Co., Ltd. (72) Shiramoto Morimitsu Ibaraki 6-1, Kashiwara, Ishioka, Ishikawa Prefecture, Central Research Institute, Ask (72) Inventor, Masaaki Oda 6-1, Kashiwara, Ishioka, Ibaraki Prefecture Central Research Institute, Ltd.
Claims (1)
％、珪酸質原料１５〜４５重量％、繊維質原料２〜８重
量％及び無機質充填材５〜４０重量％を含有してなる原
料スラリーを所定の形状に成形後、得られた成形体を圧
力容器内で水熱反応させることからなる軽量珪酸カルシ
ウム板の製造方法において、珪酸質原料の一部として比
表面積が１ｍ2／ｇ以上の非晶質珪酸原料または珪酸塩
原料の１種または２種以上を２〜２０重量％使用し、且
つ成形体を水熱反応させる前に、成形体を(養生温度−
１５)×養生時間＝１２０℃・時間以上となる条件下で
１次養生することを特徴とする軽量珪酸カルシウム板の
製造方法。1. A raw material slurry containing 17 to 50% by weight of calcareous raw material, 15 to 45% by weight of siliceous raw material, 2 to 8% by weight of fibrous raw material, and 5 to 40% by weight of inorganic filler as a solid content. In a method for producing a lightweight calcium silicate plate, which comprises hydrothermally reacting the obtained molded body in a pressure vessel after being molded into a predetermined shape, as a part of the siliceous raw material, a specific surface area of 1 m 2 / g or more is used. 2 to 20% by weight of one or more of the crystalline silicic acid raw material or the silicate raw material is used, and before the hydrothermal reaction of the shaped body, the shaped body is subjected to (curing temperature-
15) × Curing time = 120 ° C. A method for producing a lightweight calcium silicate plate, which comprises performing primary curing under the condition of 120 ° C./hour or more.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14070095A JP3750950B2 (en) | 1994-12-26 | 1995-06-07 | Calcium silicate plate manufacturing method |
| TW85108038A TW399032B (en) | 1995-05-30 | 1996-07-03 | Method of manufacturing calcium silicate board |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32322594 | 1994-12-26 | ||
| JP6-323225 | 1994-12-26 | ||
| JP14070095A JP3750950B2 (en) | 1994-12-26 | 1995-06-07 | Calcium silicate plate manufacturing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08231261A true JPH08231261A (en) | 1996-09-10 |
| JP3750950B2 JP3750950B2 (en) | 2006-03-01 |
Family
ID=26473141
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14070095A Expired - Fee Related JP3750950B2 (en) | 1994-12-26 | 1995-06-07 | Calcium silicate plate manufacturing method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3750950B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5851354A (en) * | 1996-04-22 | 1998-12-22 | Ask Corporation | Method of manufacturing calcium silicate board |
-
1995
- 1995-06-07 JP JP14070095A patent/JP3750950B2/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5851354A (en) * | 1996-04-22 | 1998-12-22 | Ask Corporation | Method of manufacturing calcium silicate board |
| US5952087A (en) * | 1996-04-22 | 1999-09-14 | Ask Corporation | Calcium silicate board and method of manufacture therefor |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3750950B2 (en) | 2006-03-01 |
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