JP4398633B2 - Manufacturing method of inorganic board - Google Patents

Manufacturing method of inorganic board Download PDF

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Publication number
JP4398633B2
JP4398633B2 JP2002213710A JP2002213710A JP4398633B2 JP 4398633 B2 JP4398633 B2 JP 4398633B2 JP 2002213710 A JP2002213710 A JP 2002213710A JP 2002213710 A JP2002213710 A JP 2002213710A JP 4398633 B2 JP4398633 B2 JP 4398633B2
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Japan
Prior art keywords
inorganic
colored cement
colored
inorganic board
board
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Expired - Fee Related
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JP2002213710A
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Japanese (ja)
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JP2004050727A (en
Inventor
靖浩 堤
雅弘 樫田
幸雄 嶋田
健二 松山
剛 川口
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
KMEW Co Ltd
Original Assignee
Kubota Matsushitadenko Exterior Works Ltd
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Priority to JP2002213710A priority Critical patent/JP4398633B2/en
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Description

【0001】
【発明の属する技術分野】
この出願の発明は、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、この出願の発明は、高い表面意匠性を有し、長期使用による表面摩耗後も意匠性が保持される無機質板の製造方法に関するものである。
【0002】
【従来の技術とその課題】
セメント系の無機質板は、外壁材、屋根材等の外装材として広く用いられており、表面に柄、目地等の凹凸模様、着色、塗装等の施された多種多様の意匠を有するものが提供されている。
【0003】
従来の無機質板の製造方法では、無機質板は、通常、少なくともセメントを主成分とし、補強繊維や無機充填材を含有してなる原料スラリーを抄造または押出して湿潤シートとし、これをプレス機によって脱水成形して模様付けし、次いで養生して得られる。
【0004】
また、近年はとくに重厚感や高級感を与える鉄平石、割石、砂岩(サンドストーン)等の天然石やレンガに似た色調や質感を有する外装材への要望が高まっていることから、プレス成形により凹凸模様を施した基板に、複数色の上塗り塗装や柄印刷を施し、化粧塗膜を形成している。
【0005】
しかし、無機質板はその用途から紫外線や降雨等の厳しい環境下に曝されるため、使用中に化粧塗膜が剥離し、当初のデザインが長期間維持できないという問題があった。
【0006】
【発明が解決しようとする課題】
このような状況下において、上塗り塗装や柄印刷を施して無機質板表面に化粧塗膜を形成する方法の他、顔料とセメント成分を含有する着色セメントスラリーを塗布して着色セメント層を設け、そこにさらに化粧塗装を施して化粧層を形成する方法が提案されている。このような化粧層は従来の化粧塗膜に比較して耐久性が高いものの、経年により摩耗した場合にはやはり表面の塗装が消失するため、意匠性が維持できなかったのが実情である。
【0007】
そこで、この出願の発明は、以上のとおりの事情に鑑みてなされたものであり、従来技術の問題点を解消し、長期に渡り高い意匠性が維持される無機質板の製造方法を提供することを課題としている。
【0008】
【課題を解決するための手段】
この出願の発明は、上記の課題を解決するものとして、第1には、少なくともセメント成分を固形分として含有する原料スラリーを抄造または押出し、得られた湿潤板を成形、養生する無機質板の製造方法において、湿潤板表面に顔料とセメント成分を含有し、繊維成分を含有しない着色セメントスラリーを、1〜5mm程度の滴として不均一に複数色散布し、表面および厚み方向にランダムな色柄を有する着色セメント層を形成し、この後、成形、養生することを特徴とする無機質板の製造方法を提供する。
【0009】
また、この出願の発明は、第2には、着色セメントスラリーを粒状に散布する前記の無機質板の製造方法を提供する。
【0010】
そして、この出願の発明は、第3には、着色セメントスラリーを複数色同時に散布する前記いずれかの無機質板の製造方法をも提供する。
【0011】
【発明の実施の形態】
この出願の発明の無機質板の製造方法は、通常の方法により製造された湿潤板の表面に、顔料とセメント成分を含有し、繊維成分を含有しない複数色の着色セメントスラリーを散布し、プレス成形して着色セメントを埋設することにより、表面および厚み方向にランダムな色柄を有する着色セメント層を設けることを特徴とするものである。
【0012】
したがって、この出願の発明において、湿潤板の製造方法はとくに限定されず、原料スラリーを抄造または押出しする一般的な方法が適用される。原料スラリーは、固形分としてセメント成分を含有するものであればよく、その組成や粘度はとくに限定されない。抄造法、押出し法のいずれを適用するかにより補強繊維、無機充填材、増粘剤等の組成や含水率を適宜調整すればよい。
【0013】
また、得られた湿潤板に散布される着色セメントスラリーは、セメント成分と顔料を含有し、繊維成分を含有しないものであればよく、その組成もとくに限定されない。例えば、無機質板表面に天然石に似た質感を付与するために着色セメントスラリー中に珪砂、パーライト、シラスバルーン等の骨材を添加してもよい。また、着色セメントスラリーの含水率も原料スラリーと同等としてもよいし、原料スラリーよりも含水率の低いものとしてもよい。
【0014】
この出願の発明の無機質板の製造方法では、湿潤板への着色セメントスラリーの散布方法もとくに限定されない。無機質板に天然石に似た色調や質感を付与することが目的であることから、着色セメントスラリーを湿潤板全体に均一に塗布するのではなく、例えば図1に示されるように、複数色の着色セメントスラリー(21、22、23)をダマ状や粒状などの形状で湿潤板(1)表面に不均一に散布する(図1a)。具体的には、エアースプレーガンやシャワーノズルの孔径や吐出圧を適宜調節し、着色セメントスラリーが1〜5mm程度の滴となって不均一に放出されるようにす。このとき、各着色セメントスラリー(21、22、23)は、一色ずつ順に散布してもよいし、複数色を同時に散布してもよい。このように複数色の着色セメントスラリー(21、22、23)を散布した後プレス成形すれば、湿潤板(1)の表面および厚み方向に着色セメントが埋設され、ランダムな色柄を有する着色セメント層(3)が形成される。このような着色セメント層(3)の厚さはとくに限定されず、プレス成形により施される凹凸模様や目地の深さ等に応じて、例えば100〜500μmとすることができる。そして、室温および/または高温で養生することにより、湿潤板(1)が硬化して形成された無機質基板(11)の表面および厚み方向に色柄(31、32、33)を有する無機質板(4)が得られる(図1b)。
【0015】
そして、この出願の発明の無機質板の製造方法により製造される無機質板(4)は、着色セメント層(3)に表面および厚み方向にランダムな色柄(31、32、33)を有するため、屋外で紫外線や降雨等に曝され、この着色セメント層(3)が摩耗しても、残存する着色セメント層(3’)に色柄(31’、32’、33’)が現れ、長期に渡り高い意匠性が保持されるのである(図1c)。
【0016】
この出願の発明の無機質板の製造方法は、以上のとおりに、湿潤板(1)表面に複数色の着色セメントスラリー(21、22、23)を散布し、色柄(31、32、33)を有する着色セメント層(3)を設けるものであればよく、その他の工程についてはとくに限定されない。例えば、得られた無機質板にさらに意匠性を高めるための化粧塗装を施したり、エフロレッセンスの防止や耐久性の向上のための耐水性塗装を施したりしてもよい。
【0017】
以下、実施例を示し、この発明の実施の形態についてさらに詳しく説明する。もちろん、この発明は以下の例に限定されるものではなく、細部については様々な態様が可能であることは言うまでもない。
【0018】
【実施例】
<実施例1>
普通ポルトランドセメント45wt%、珪砂20wt%、珪石粉25%、パルプ10wt%を配合した固形分濃度45wt%の水性スラリーを抄造し、厚さ10〜12mmの湿潤板を作した。
【0019】
この湿潤板を脱水して含水率を70%とし、表1に示した配合の各着色セメントスラリーをエアースプレーガンのエアー圧を調整し、スラリーが1〜5mmの粒状に出る低圧条件で同一箇所に同時に散布した。
【0020】
【表1】

Figure 0004398633
【0021】
次いでプレス脱水成形し、80℃で一次養生した後、表裏面にエフロ止めのためにアクリルエマルジョンシーラーを塗布し、さらに170℃でオートクレーブ養生して無機質板を得た。
【0022】
得られた無機質板は、厚さ約500μmの着色セメント層を有し、天然石風の色調や質感を有するものであった。また、無機質板の強度や耐久性等の物性は従来と同等であった。
【0023】
【発明の効果】
この出願の発明により、長期に渡り高い意匠性が維持される無機質板の製造方法が提供される。この出願の発明の方法により製造される無機質板は、厚み方向にランダムな色柄を有する着色セメント層を有するため、紫外線や降雨等に曝されてこの着色セメント層が摩耗しても、下層の色柄が現れ、長期に渡り天然石風の色調や質感が保持される。
【図面の簡単な説明】
【図1】 この出願の発明の無機質板の製造方法の概要を説明する概略模式図である。
【符号の説明】
1 湿潤板
11 無機質基板
21 着色セメントスラリー
22 着色セメントスラリー
23 着色セメントスラリー
3 着色セメント層
31 色柄
32 色柄
33 色柄
3’ 着色セメント層(経年後)
31’ 色柄(経年後)
32’ 色柄(経年後)
33’ 色柄(経年後)
4 無機質板[0001]
BACKGROUND OF THE INVENTION
The invention of this application relates to a method for producing an inorganic plate. More specifically, the invention of this application relates to a method for producing an inorganic plate having high surface design properties and retaining design properties even after surface wear due to long-term use.
[0002]
[Prior art and its problems]
Cement-based inorganic boards are widely used as exterior materials such as exterior wall materials and roofing materials, and are provided with a wide variety of designs with uneven patterns such as patterns and joints on the surface, coloring, and painting. Has been.
[0003]
In a conventional method for producing an inorganic board, the inorganic board is usually made of a raw slurry containing at least cement as a main component and containing reinforcing fibers and an inorganic filler to form or extrude a wet sheet, which is dehydrated by a press. Molded and patterned, then cured.
[0004]
In recent years, there has been a growing demand for exterior materials that have colors and textures similar to natural stones and bricks, such as iron stone, rubble, and sandstone, which give a particularly profound and high-class feel. A multi-colored top coat or pattern printing is applied to a substrate with an uneven pattern to form a decorative coating.
[0005]
However, since the inorganic board is exposed to harsh environments such as ultraviolet rays and rain due to its use, there is a problem that the decorative coating peels off during use and the original design cannot be maintained for a long time.
[0006]
[Problems to be solved by the invention]
Under such circumstances, in addition to a method of applying a top coat or pattern printing to form a decorative coating on the surface of an inorganic board, a colored cement slurry containing a pigment and a cement component is applied to provide a colored cement layer, Further, a method for applying a decorative coating to form a decorative layer has been proposed. Although such a decorative layer has higher durability than conventional decorative coatings, the surface coating disappears when it is worn over time, and the design properties cannot be maintained.
[0007]
Accordingly, the invention of this application has been made in view of the circumstances as described above, and solves the problems of the prior art and provides a method for producing an inorganic plate that maintains a high designability over a long period of time. Is an issue.
[0008]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, the invention of this application firstly manufactures or extrudes a raw material slurry containing at least a cement component as a solid content, and manufactures the obtained wet plate to produce an inorganic plate to be cured. In the method, a colored cement slurry containing a pigment and a cement component on the surface of a wet plate and not containing a fiber component is sprayed in a plurality of colors as droplets of about 1 to 5 mm in a non-uniform manner , and random patterns are formed in the surface and thickness direction. There is provided a method for producing an inorganic board, characterized in that a colored cement layer is formed, and thereafter molded and cured.
[0009]
In addition, the invention of this application secondly provides the method for producing the inorganic board, in which the colored cement slurry is dispersed in a granular form.
[0010]
And thirdly, the invention of this application also provides a method for producing any one of the above-mentioned inorganic boards, in which a plurality of colored cement slurries are sprayed simultaneously.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
The manufacturing method of the inorganic board of the invention of this application is that a wet cement board manufactured by a normal method is sprayed with a plurality of colored cement slurries containing a pigment and a cement component and not containing a fiber component. Then , a colored cement layer having a random color pattern in the surface and thickness direction is provided by embedding the colored cement.
[0012]
Therefore, in the invention of this application, the manufacturing method of the wet plate is not particularly limited, and a general method for papermaking or extruding the raw slurry is applied. The raw material slurry only needs to contain a cement component as a solid content, and its composition and viscosity are not particularly limited. What is necessary is just to adjust suitably a composition and moisture content, such as a reinforcing fiber, an inorganic filler, a thickener, depending on which of a papermaking method or an extrusion method is applied.
[0013]
Further, the colored cement slurry is spread on the resulting wet sheet contains the cement component and the pigment may be any one which does not contain fiber component is not limited particularly also its composition. For example, silica sand colored cement slurry to impart a texture similar to natural stone-free machine quality plate surface, pearlite, may be added to the aggregate of such Shirasu balloons. Further, the water content of the colored cement slurry may be equal to that of the raw material slurry, or may be lower than that of the raw material slurry.
[0014]
In the manufacturing method of the inorganic board of the invention of this application, the method of spraying the colored cement slurry onto the wet board is not particularly limited. Since the purpose is to give the inorganic board a color tone and texture similar to natural stone, the colored cement slurry is not uniformly applied to the entire wet board, but, for example, as shown in FIG. The cement slurry (21, 22, 23) is spread unevenly on the surface of the wet plate (1) in the form of lumps or granules (FIG. 1a). Specifically, by appropriately adjusting the hole diameter and the discharge pressure of the air spray gun and the shower nozzle, it as colored cement slurry is made nonuniform release the drops of about 1 to 5 mm. At this time, the colored cement slurries (21, 22, 23) may be dispersed one color at a time, or a plurality of colors may be dispersed simultaneously. If the colored cement slurry (21, 22, 23) is sprayed after being sprayed in this manner, the colored cement is embedded in the surface and thickness direction of the wet plate (1), and has a random color pattern. Layer (3) is formed. The thickness of such a colored cement layer (3) is not particularly limited, and can be set to 100 to 500 μm, for example, depending on the uneven pattern or depth of joints applied by press molding. And the inorganic board which has a color pattern (31, 32, 33) in the surface and thickness direction of the inorganic board | substrate (11) formed by hardening | curing the wet board (1) by curing at room temperature and / or high temperature ( 4) is obtained (FIG. 1b).
[0015]
And since the inorganic board (4) manufactured by the manufacturing method of the inorganic board of the invention of this application has random colored patterns (31, 32, 33) in the surface and thickness direction on the colored cement layer (3), Even if this colored cement layer (3) is worn out by being exposed to ultraviolet rays, rain or the like outdoors, the colored pattern (31 ′, 32 ′, 33 ′) appears on the remaining colored cement layer (3 ′), A high designability is maintained (FIG. 1c).
[0016]
As described above, the manufacturing method of the inorganic board of the invention of this application is that the colored cement slurry (21, 22, 23) is sprayed on the surface of the wet board (1), and the color pattern (31, 32, 33). There is no particular limitation on the other steps as long as the colored cement layer (3) having s is provided. For example, the obtained inorganic plate may be subjected to a decorative coating for further improving the design, or a water-resistant coating for preventing efflorescence and improving durability.
[0017]
Hereinafter, examples will be shown, and the embodiments of the present invention will be described in more detail. Of course, the present invention is not limited to the following examples, and it goes without saying that various aspects are possible in detail.
[0018]
【Example】
<Example 1>
Ordinary portland cement 45 wt% silica sand 20 wt% silica flour 25%, the solid concentration of 45 wt% aqueous slurry by blending 10 wt% pulp papermaking was created made wet plate having a thickness of 10-12 mm.
[0019]
The wet plate is dehydrated to a moisture content of 70%, and each colored cement slurry having the composition shown in Table 1 is adjusted in the air pressure of the air spray gun. Sprayed simultaneously.
[0020]
[Table 1]
Figure 0004398633
[0021]
Next, press dehydration molding was performed, and after primary curing at 80 ° C., an acrylic emulsion sealer was applied to the front and back surfaces to prevent erosion, and further autoclaved at 170 ° C. to obtain an inorganic plate.
[0022]
The obtained inorganic board had a colored cement layer with a thickness of about 500 μm, and had a natural stone-like color tone and texture. Further, the physical properties such as strength and durability of the inorganic plate were the same as those of the conventional one.
[0023]
【The invention's effect】
The invention of this application provides a method for producing an inorganic plate that maintains high designability over a long period of time. Since the inorganic board manufactured by the method of the invention of this application has a colored cement layer having a random color pattern in the thickness direction, even if the colored cement layer is worn by exposure to ultraviolet rays or rain, Color patterns appear, and natural stone-like colors and textures are maintained for a long time.
[Brief description of the drawings]
FIG. 1 is a schematic diagram illustrating an outline of a method for producing an inorganic plate according to the invention of this application.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Wet board 11 Inorganic substrate 21 Colored cement slurry 22 Colored cement slurry 23 Colored cement slurry 3 Colored cement layer 31 Color pattern 32 Color pattern 33 Color pattern 3 'Colored cement layer (after aging)
31 'color pattern (after years)
32 'color pattern (after years)
33 'color pattern (after years)
4 Inorganic board

Claims (3)

少なくともセメント成分を固形分として含有する原料スラリーを抄造または押出し、得られた湿潤板を成形、養生する無機質板の製造方法において、湿潤板表面に顔料とセメント成分を含有し、繊維成分を含有しない着色セメントスラリーを、1〜5mm程度の滴として不均一に複数色散布し、表面および厚み方向にランダムな色柄を有する着色セメント層を形成し、この後、成形、養生することを特徴とする無機質板の製造方法。In a method for producing an inorganic board in which a raw material slurry containing at least a cement component as a solid content is made or extruded, and the resulting wet board is molded and cured, the surface of the wet board contains a pigment and a cement component, but no fiber component. The colored cement slurry is dispersed in a non-uniform color as drops of about 1 to 5 mm to form a colored cement layer having a random color pattern on the surface and in the thickness direction, and thereafter molded and cured. Manufacturing method of inorganic board. 着色セメントスラリーは、粒状に散布する請求項1の無機質板の製造方法。  The method for producing an inorganic board according to claim 1, wherein the colored cement slurry is dispersed in a granular form. 着色セメントスラリーは、複数色を同時に散布する請求項1または2のいずれかの無機質板の製造方法。  The method for producing an inorganic board according to claim 1, wherein the colored cement slurry is sprayed with a plurality of colors simultaneously.
JP2002213710A 2002-07-23 2002-07-23 Manufacturing method of inorganic board Expired - Fee Related JP4398633B2 (en)

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