JPH045002A - Manufacture of inorganic cement plate - Google Patents
Manufacture of inorganic cement plateInfo
- Publication number
- JPH045002A JPH045002A JP2107165A JP10716590A JPH045002A JP H045002 A JPH045002 A JP H045002A JP 2107165 A JP2107165 A JP 2107165A JP 10716590 A JP10716590 A JP 10716590A JP H045002 A JPH045002 A JP H045002A
- Authority
- JP
- Japan
- Prior art keywords
- sheet
- silicone
- silica
- cement
- making
- 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.)
- Pending
Links
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 20
- 239000004568 cement Substances 0.000 title claims abstract description 17
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical class O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 33
- 239000002518 antifoaming agent Substances 0.000 claims abstract description 17
- 239000002002 slurry Substances 0.000 claims abstract description 15
- 229920001296 polysiloxane Polymers 0.000 claims abstract description 13
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 11
- 239000011248 coating agent Substances 0.000 claims abstract description 4
- 238000000576 coating method Methods 0.000 claims abstract description 4
- 238000002156 mixing Methods 0.000 claims abstract description 4
- 238000000034 method Methods 0.000 claims description 14
- 238000005187 foaming Methods 0.000 abstract description 8
- 230000000694 effects Effects 0.000 abstract description 4
- 230000005484 gravity Effects 0.000 abstract description 4
- 230000003254 anti-foaming effect Effects 0.000 abstract description 3
- 230000018044 dehydration Effects 0.000 abstract description 3
- 238000006297 dehydration reaction Methods 0.000 abstract description 3
- 239000006260 foam Substances 0.000 abstract description 2
- 239000007888 film coating Substances 0.000 abstract 1
- 238000009501 film coating Methods 0.000 abstract 1
- 235000014113 dietary fatty acids Nutrition 0.000 description 7
- 239000000194 fatty acid Substances 0.000 description 7
- 229930195729 fatty acid Natural products 0.000 description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 150000004665 fatty acids Chemical class 0.000 description 5
- -1 fatty acid esters Chemical class 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 239000011398 Portland cement Substances 0.000 description 3
- 239000010425 asbestos Substances 0.000 description 3
- 238000007796 conventional method Methods 0.000 description 3
- 229910052895 riebeckite Inorganic materials 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 2
- 125000005907 alkyl ester group Chemical group 0.000 description 2
- 239000003995 emulsifying agent Substances 0.000 description 2
- 239000010881 fly ash Substances 0.000 description 2
- 239000011490 mineral wool Substances 0.000 description 2
- 239000003973 paint Substances 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 229920003171 Poly (ethylene oxide) Polymers 0.000 description 1
- 239000002280 amphoteric surfactant Substances 0.000 description 1
- 239000000839 emulsion Substances 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- HYBBIBNJHNGZAN-UHFFFAOYSA-N furfural Chemical compound O=CC1=CC=CO1 HYBBIBNJHNGZAN-UHFFFAOYSA-N 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 229910000077 silane Inorganic materials 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Classifications
-
- 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
Landscapes
- Press-Shaping Or Shaping Using Conveyers (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
Description
【発明の詳細な説明】
(産業上の利用分野)
この発明は、セメント系無機質板の製造方法に関するも
のである。さらに詳しくは、この発明は、抄造時の発泡
を抑え、P水性、脱水性を向上させ、かつ、製品の塗膜
密着性等の特性も良好なものとすることのできる、生産
性の高いセメント系無機質板の製造方法に関するもので
ある。DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a method for manufacturing a cement-based inorganic board. More specifically, this invention provides a highly productive cement that suppresses foaming during paper making, improves P water resistance and dehydration properties, and provides products with good properties such as paint film adhesion. The present invention relates to a method for manufacturing an inorganic board.
(従来の技術)
従来より、セメントにアスベスト、ロックウール、パル
プ等を配合したスラリーよりセメント系無機質板をシー
ト(グリーンシート)抄造する方法が知られており、こ
の方法により製造された無機質板は、建築用の外装材、
屋根材、天井材等として広く用いられている。(Prior art) A method of manufacturing cement-based inorganic boards (green sheets) from a slurry of cement mixed with asbestos, rock wool, pulp, etc. has been known for some time, and the inorganic boards manufactured by this method are , architectural exterior materials,
Widely used as roofing material, ceiling material, etc.
このようなセメントスラリーからの抄造による無機質板
の製造は、たとえば第1図に示したように、ポルトラン
ドセメント、アスベスト、ロンフラール、パルプ等から
なる原料スラリー(1)より抄造ドラム(2)あるいは
ハチエツトマシーン等によってシート(3)を抄造し、
次いでこのシート(3)をプレスロール(4)によって
加圧脱水した後に養生硬化させて無機質板とする方法か
らなっている。In order to manufacture an inorganic board by paper-making from cement slurry, for example, as shown in Fig. 1, a raw material slurry (1) consisting of portland cement, asbestos, ronfural, pulp, etc. is processed into a paper-making drum (2) or hatchet. Form the sheet (3) using a machine etc.
Next, this sheet (3) is dehydrated under pressure using a press roll (4), and then cured and cured to form an inorganic board.
また、この方法においては、抄造ドラム(2)によりP
水しつつシート(3)を抄造してもいる。In addition, in this method, the papermaking drum (2)
The sheet (3) is also produced while washing.
この抄造法による無機質板の製造は、高効率でシート抄
造することができることから、生産性に優れた方法とし
て採用されてきている。The production of inorganic plates by this papermaking method has been adopted as a highly productive method because it allows sheet production with high efficiency.
(発明が解決しようとする課題)
しかしながら、この抄造法によってシートを製造する場
合には、セメントスラリー(1)の抄造液面やスラリー
中、および抄造されたシート(3)中に泡が発生し、こ
の泡がシート抄造における炉水性や脱水性を低下させ、
生産性の向上を難しくしている。(Problems to be Solved by the Invention) However, when manufacturing sheets using this papermaking method, bubbles are generated on the surface of the cement slurry (1), in the slurry, and in the papersheet (3). , these bubbles reduce the reactor water resistance and dewaterability during sheet manufacturing,
This makes it difficult to improve productivity.
このため、従来より、セメントスラリー(1)中に消泡
剤を添加してこの発泡を抑えてきている。For this reason, conventionally, an antifoaming agent has been added to the cement slurry (1) to suppress this foaming.
このような消泡剤としては、たとえば中性あるいは両性
界面活性剤と脂肪酸との配合物からなるエマルジョン型
のものが使用されてきている。As such an antifoaming agent, for example, an emulsion type antifoaming agent consisting of a mixture of a neutral or amphoteric surfactant and a fatty acid has been used.
しかしながら、このような工夫にもかかわらず、泡を充
分に消すためには多量の消泡剤の添加が必要であり、こ
の多量添加によってスラリー中に消泡剤が蓄積し、逆に
この蓄積が発泡を誘発するという問題があった。このた
め、従来の方法においては、消泡剤の添加量の増大によ
って、結局のところ生産性の向上は困難であって、コス
ト面や、無機質板の性能面でも良好とはいえないのが実
情であった。However, despite these efforts, it is necessary to add a large amount of antifoaming agent in order to sufficiently extinguish the foam, and this large addition causes accumulation of antifoaming agent in the slurry, and conversely this accumulation There was a problem of inducing foaming. For this reason, in the conventional method, it is difficult to improve productivity due to the increase in the amount of antifoaming agent added, and the reality is that it is not good in terms of cost and performance of the inorganic board. Met.
この発明は、以上の通りの事情に鑑みてなされたもので
あり、従来法の欠点を改善し、抄造時の発泡を抑え、r
水性、脱水性を向上させ、かつ製品性能をも良好なもの
とすることのできる、生産性に優れた新しい無機質板の
製造法を提供することを目的としている。This invention was made in view of the above circumstances, and improves the drawbacks of the conventional method, suppresses foaming during paper making, and improves r
The purpose of the present invention is to provide a new method for manufacturing an inorganic board with excellent productivity, which can improve water resistance and dehydration properties, and also improve product performance.
(課題を解決するための手段)
この発明は、上記の課題を解決するものとして、消泡剤
成分としてシリカをシリコーンでコーティングした変成
シリカをセメントスラリーに配合し、シート抄造するこ
とを特徴とするセメント系無機質板の製造方法を提供す
る。(Means for Solving the Problems) In order to solve the above-mentioned problems, the present invention is characterized in that modified silica coated with silica as an antifoaming agent component is blended into cement slurry and sheet-formed. A method for manufacturing a cement-based inorganic board is provided.
(作 用)
この発明の製造方法においては、消泡剤成分として変成
シリカを配合することを特徴としているが、通常、シリ
コーンは消泡作用は良好で、その効果は大きいものの、
抄造したシートの表面に残りやすく、この表面でのシリ
コーンの残留は、無機質板表面の塗装塗膜の密着性を悪
くする。そこで、この発明ではシリコーンの優れた消泡
効果を生かしつつ、このような欠点を解消するために、
シリカにこのシリコーンをコーティングし、比重を大き
くして抄造時にシート内部に分散するようにしている。(Function) The manufacturing method of the present invention is characterized by blending modified silica as an antifoaming agent component, but although silicone usually has a good antifoaming effect and its effect is large,
Silicone tends to remain on the surface of the paper-made sheet, and the residual silicone on this surface deteriorates the adhesion of the paint film on the surface of the inorganic board. Therefore, in this invention, in order to eliminate these drawbacks while making use of the excellent antifoaming effect of silicone,
This silicone is coated on silica to increase its specific gravity so that it is dispersed inside the sheet during papermaking.
このような方策を採用することにより、この発明の方法
においては、製品無機質板の特性を損うことなく、抄造
時の発泡を効果的に抑えている。By adopting such measures, the method of the present invention effectively suppresses foaming during papermaking without impairing the properties of the product inorganic board.
(実施例)
以下、実施例を示し、さらに詳しくこの発明の製造方法
について説明する。(Examples) Hereinafter, examples will be shown and the manufacturing method of the present invention will be explained in more detail.
ます、この発明の方法において用いるセメント成分とし
ては、普通ポルトランドセメントをはじめとする各種の
ものを用いることができ、パルプ、アスベスト、口・y
フラール等の繊維成分、さらにはフライアッシュ、シリ
カ粉などを配合してスラリー状とする。As the cement component used in the method of this invention, various materials including ordinary Portland cement can be used, and pulp, asbestos, pulp, etc.
It is made into a slurry by blending fiber components such as fural, as well as fly ash and silica powder.
添加する消泡剤としては、脂肪酸、脂肪酸アミド、脂肪
酸エステル、および乳化剤等からなる配合物が好適なも
のとして例示される。もちろんこれに限定されることは
ない、この消泡剤には、この発明の製造方法においては
、シリカ表面をシリコーンでコーティングした変成シリ
カを配合する。Suitable examples of antifoaming agents to be added include mixtures of fatty acids, fatty acid amides, fatty acid esters, emulsifiers, and the like. Of course, the antifoaming agent is not limited thereto, but in the production method of the present invention, modified silica whose silica surface is coated with silicone is blended.
変成シリカは、−船釣には、その粒径は10μm以下、
特に1μm以下の細粒であるのが好ましく、またその比
重は1.0以上のものか好ましく使用される。また、変
成シリカは、シリカ粉末と、アルコキシシラン等の反応
性シラン化合物との反応によって製造することができる
。もちろん、その他の製法によってシリコーンコーティ
ングしたシリカも使用することができる。Metamorphic silica is suitable for boat fishing, with a particle size of 10 μm or less;
In particular, fine particles of 1 μm or less are preferable, and those with a specific gravity of 1.0 or more are preferably used. Furthermore, modified silica can be produced by reacting silica powder with a reactive silane compound such as an alkoxysilane. Of course, silica coated with silicone by other manufacturing methods can also be used.
そこで、より具体的にこの発明の消泡剤を用いた場合と
変成シリカを含有しない従来の消泡剤を用いた場合との
作用効果を比較してみる。Therefore, we will more specifically compare the effects of using the antifoaming agent of the present invention and using a conventional antifoaming agent that does not contain modified silica.
この発明の消泡剤として、たとえば次の配合のものを使
用する。As the antifoaming agent of this invention, for example, the following formulation is used.
脂肪酸 5(重量%)脂肪酸アミド
3
脂肪酸エステル 5
(ポリオキシアルキレンアルキルエステル)乳化剤
2.8
(ポリオキシエチレンアルキルエステル)変性シリカ
0.2
(比重1.2)
水 84比較のため
に、変成シリカを含有しないものも用意する。Fatty acid 5 (wt%) fatty acid amide
3 Fatty acid ester 5 (polyoxyalkylene alkyl ester) emulsifier
2.8 (Polyoxyethylene alkyl ester) modified silica
0.2 (specific gravity 1.2) Water 84For comparison, a sample containing no modified silica is also prepared.
これらの消泡剤を用いて、次の配合
ポルトランドセメント 100(重量部)フライアッシ
ュ 100
パルプ 20
ロックウール 20
混練水−3800
のセメントスラリーよりシート抄造を行った。Using these antifoaming agents, a sheet was formed from a cement slurry having the following composition: Portland cement: 100 (parts by weight): fly ash: 100: pulp: 20: rock wool: 20: kneading water: 3,800 parts.
抄造時の比較を示したものが表1である。この表1から
明らかなように、この発明の製造方法の場合には、発泡
の量は従来より25%も低減され、しかも抄造スピード
、引張強度ともに向上している。Table 1 shows a comparison during papermaking. As is clear from Table 1, in the case of the manufacturing method of the present invention, the amount of foaming is reduced by 25% compared to the conventional method, and both the papermaking speed and tensile strength are improved.
この引張強度の向上は、泡の量の減少により抄造シート
の組織が緻密になり、強度の向上をもたらしたものと考
えられる。This improvement in tensile strength is thought to be due to the fact that the structure of the paper sheet became denser due to the reduction in the amount of bubbles, resulting in an improvement in strength.
また、変性シリカを用いても、塗膜密着性に何ら問題が
ないこともわかる。It can also be seen that there is no problem in coating film adhesion even when modified silica is used.
表
(発明の効果)
この発明により、以上詳しく説明した通り、抄造時の抄
造液面、スラリー中、およびシート中の発泡は抑えられ
、炉水性、脱水性か向上して生産性が増大する。また、
塗膜密着性は良好であって、強度等の特性も向上する。Table (Effects of the Invention) As explained in detail above, the present invention suppresses foaming at the surface of the papermaking liquid, in the slurry, and in the sheet during papermaking, improves furnace water resistance and dewaterability, and increases productivity. Also,
The coating film adhesion is good, and properties such as strength are also improved.
第1図は、抄造法によるシート製造法を例示した工程断
面図である。
1・・・原料スラリー
2・・・抄造ドラム
3・・・シ − ト
4・・・プレスロールFIG. 1 is a process sectional view illustrating a sheet manufacturing method using a papermaking method. 1... Raw material slurry 2... Paper making drum 3... Sheet 4... Press roll
Claims (1)
ングした変成シリカをセメントスラリーに配合し、シー
ト抄造することを特徴とするセメント系無機質板の製造
方法。(1) A method for manufacturing a cement-based inorganic board, which comprises blending modified silica, which is obtained by coating silica with silicone as an antifoaming agent component, into cement slurry and forming a sheet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2107165A JPH045002A (en) | 1990-04-23 | 1990-04-23 | Manufacture of inorganic cement plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2107165A JPH045002A (en) | 1990-04-23 | 1990-04-23 | Manufacture of inorganic cement plate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH045002A true JPH045002A (en) | 1992-01-09 |
Family
ID=14452136
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2107165A Pending JPH045002A (en) | 1990-04-23 | 1990-04-23 | Manufacture of inorganic cement plate |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH045002A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1078897A1 (en) * | 1999-08-26 | 2001-02-28 | Halliburton Energy Services, Inc. | Early enhanced strength cement composition |
-
1990
- 1990-04-23 JP JP2107165A patent/JPH045002A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1078897A1 (en) * | 1999-08-26 | 2001-02-28 | Halliburton Energy Services, Inc. | Early enhanced strength cement composition |
| US6478868B1 (en) | 1999-08-26 | 2002-11-12 | Halliburton Energy Services, Inc. | Early-enhanced strength cement compositions and methods |
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