JP3741540B2 - How to make a fiber-reinforced cement board - Google Patents

Description

【０００１】
【発明の属する技術分野】
この発明は繊維補強セメント板材の表面模様付け方法に関する。
【０００２】
【従来の技術】
外壁用建築用板材として、繊維補強セメント板が非常に広く使用されている。これら繊維補強セメント板は、そのままであると表面が平滑で地色が灰白〜灰黒色で意匠性に乏しいため、表面に各種色彩あるいは凹凸模様を付すことが行われる。
【０００３】
ところで、これら繊維補強セメント板などで構成される外壁の塗装仕上げとしてリシン塗装が知られている。
このリシン塗装は塗料中に細かい砂粒を配合しスプレー塗装するのが一般的で、外壁表面の凹凸模様のデザインと相まって、配合された細かい砂粒が表面に浮き出た艶消しの高級なデザイン性を持つものとして一般に好まれている。
【０００４】
【発明が解決しようとする課題】
しかしながら、このリシン塗料は、配合される砂粒など塗料の性質や仕上がり外観の性格上工場生産的に生産するのは難しく、現地塗装による塗装方法では塗料中の砂粒は均一に分布してしまい、高級感や自然な基材感が得られないと言った問題がある。
【０００５】
また、従来ではこのようなリシン塗装、特に砂粒の分布状態が不均一な表面化粧を施した繊維補強セメント板は工場生産的には実施されていないのが現状である。
【０００６】
この発明は、上記問題点に鑑み、リシン調の高級感に溢れる表面化粧を、現地塗装ではなく工場生産的に高能率に生産し、さらに砂粒を不均一に分布させることにより自然な素材感を持つ繊維補強セメント板材の表面模様付け方法を得ることを目的としてなされたものである。
【０００７】
【課題を解決するための手段】
即ち、請求項１の発明の繊維補強セメント板材の表面模様付け方法は、製板後プレスし一次養生硬化させた繊維補強セメント板材表面に第一のシーラ塗装を行い、該塗膜の乾燥前に粒子状物質を不均一に散布して付着させ、前記シーラ塗膜の乾燥後前記繊維補強セメント板材をオートクレーブ養生し、次いで表面に第二のシーラ塗装をし、乾燥後さらに全面上塗り塗装するものである。
【０００８】
この方法によれば、第一のシーラ塗料に不均一分布に付着固定した粒子状物質によって繊維補強セメント板の表面にリシン吹き付け様の外観素地が形成され、さらにこの表面の着色によってリシン調で高級感に優れ、さらに砂粒の不均一分布により本物の天然石に近い変化のある外観の化粧が工業的に実施可能となる。
【０００９】
なお、上記における繊維補強セメント板は押出成形法、抄造法、乾式製法、注型法など任意の製法で得られたものが使用される。
請求項２の発明は、上記発明においてプレスが凹凸模様プレスとされ、また、全面上塗り塗装の乾燥後、凸部模様表面のみにロールコータにより塗装するものである。
【００１０】
この発明によれば、凸部表面のみが選択的に塗装されるため凸部表面の特異性を有するリシン調の化粧を工業生産的に容易に実施することができる。
請求項３の発明は、上記発明において粒子状物質が着色粒子であり、全面上塗り塗料がクリヤー塗装とされたものである。
【００１１】
この発明によれば、色彩の異なる粒子状物質により複雑な模様が得られしかも表面のクリヤー塗装によりこれら粒子状物質の彩色模様が外観としてあらわれるのでリシン調でありながら砂粒の不均一な分布により自然石風の外観模様が工業的手段で得られる。
【００１２】
なお、ここでクリヤー塗装は無色透明の他、着色透明の場合も含む。
請求項４の発明は、上記各発明において繊維補強セメント板の配合材料中に着色顔料が添加してなるものである。
【００１３】
この発明によれば、基材そのものも着色されているので、表面に付着させた着色粒子の色彩と併せてより複雑な色彩の組み合わせが得られ、この結果さらに本物の自然石の外観に近い模様が工業的手段で得られる。
【００１４】
【実施例】
次にこの発明の実施例を説明する。
なお、この発明の繊維補強セメント板の製造方法としては押出成形法、抄造法、乾式製法、注型法など任意の製法が適用できるが、以下いわゆるフローオン成形法について説明する。
実施例１
図１に示すように、吸引脱水装置１を備えたフェルトベルト２上にセメントスラリー３を供給し、吸引脱水しつつ厚さ20mm、幅450mmの繊維補強セメント板４を製板した。
【００１５】
この繊維補強セメント板４を、カッター５で長さ3,000mm毎に裁断し、プレス盤６でプレスし表面を平滑にした。この繊維補強セメント板４を１２時間室温で一次養生した。
【００１６】
図２に示すように、この繊維補強セメント板４をコンベヤ７で移送し表面にフローコータ８によりアクリルエマルジョン系の第一のシーラ９を50g/m²で均一に塗布し、次いで第一のシーラ９が乾燥硬化しないうちに、邪魔板１０ａを配設した砂散布機１０で最大粒子径が2mm 以下、平均粒径１mmの砂粒からなる粒子状物質１１を６００ｇ／ｍ²〜３００ｇ／ｍ²範囲で不均一分布となるよう邪魔板１０ａを矢印で示すように往復動させることによって斑状に散布した。
【００１７】
次いで、シーラを乾燥硬化させ粒子状物質１１を付着固定させた。
その後、オートクレーブにより高温高圧養生を８時間行ない、繊維補強セメント板４本体の強度を発現させた。
【００１８】
そして、アクリルエマルジョン系の第二のシーラ塗装を全面に行ない、乾燥後さらに上塗り着色塗装し、乾燥させて製品とした。
実施例２
実施例１と同様厚さ20mm、幅450mmの繊維補強セメント板４を成形し、凹凸模様プレスで図３(ａ)(ｂ)に示すように天然石風の凹凸模様11Ａ(図３(ａ))と煉瓦積様の目地溝模様11Ｂ(図３(ｂ))の二種の凹凸模様をそれぞれ付した。その後一次養生硬化させた。
【００１９】
この繊維補強セメント板１を図４に示すようにコンベヤ７で移送し表面にロールコータ８ａにより凸部表面のみにアクリルエマルジョン系のシーラ９を50g/m²で均一に塗布し、次いでシーラ９が乾燥硬化しないうちに表面に砂散布機５により実施例１と同様の粒子径の砂粒６を不均一な分散状態となるように散布した。
【００２０】
次いで、塗料を乾燥させオートクレーブにより高温高圧養生を行ない板材強度を発現させ、実施例１と同様表面全面にフローコータによりアクリル系の第二のシーラ塗料を塗装後、乾燥させさらに上塗り塗装し乾燥後、凸部表面のみにロールコータにより着色塗装した。
実施例３
実施例１と同様にして表面に粒子状物質６を不均一分布で付着固定した一次養生後の繊維補強セメント板４を得、その後実施例１と同様オートクレーブにより高温高圧養生を行なって板材強度を発現させ、その表面に図５に示すようにルーター12により幅10mm、深さ4mm で縦50mm、横150mm の等間隔となる煉瓦積様の目地溝模様１１ｄを研削した。
【００２１】
次いで繊維補強セメント板表面全面にシーラ塗装及び上塗塗装を行い、塗料を乾燥しさらにロールコータにより凸部表面のみ着色塗装し製品を得た。
実施例４
繊維補強セメント板の配合材料中に顔料を添加した着色原料を使用した他は実施例３と同様ルータ加工後、全面にシーラ塗装および凸部のみロールコータにより着色塗装を行ない繊維補強セメント板の製品を得た。
実施例１〜４で得た繊維補強セメント板１の表面を観察したところ、実施例１、２のものは、全面が斑状のリシン素地の平滑なあるいは天然石風の化粧面、実施例３は天然石風の凹凸模様又は煉瓦目地様凹凸模様のうち凹部模様部分は平坦で凸部模様表面がリシン調素地面を基調とする非常に高級な外観構成をなすものとなり、実施例４は研削加工された凹部模様表面の色彩と凸部模様表面の色彩とがコントラストをなしさらに優れた外観構成をなしており、さらに砂粒の不均一な分布により、より本物に近い素材感をかもしだしていた。
【００２２】
また、各実施例の繊維補強セメント板を切断し表面部分を拡大観察したところ図６に模式的に示すように粒子状物質１１は繊維補強セメント板４の表面に第一のシーラ９で付着しさらに表面が第二のシーラ１３と上塗り塗料１４で被覆され強固に保持されているのが観察された。
【００２３】
【発明の効果】
以上説明したように、この発明の方法によれば、微小砂粒の配合塗料を現場吹付塗装して得られるリシン調化粧面が、工場生産的に大量生産可能となり、従来施工が面倒であったリシン調化粧面が工業的に大量にかつ安価に得ることができる効果を有する。
【００２４】
さらに、付着された粒子はシーラと上塗り塗料により確実に繊維補強セメント板表面に保持されるので容易に剥落することがなく長期にわたって良好な外観を維持する効果を有する。
【図面の簡単な説明】
【図１】この発明の繊維補強セメント板の製造工程を示す側面図である。
【図２】この発明の塗装工程を示す側面図である。
【図３】この発明の凹凸プレスの形態の説明断面図であり、（ａ）は自然石風の凹凸模様、（ｂ）は煉瓦目地状の凹凸模様を示す。
【図４】この発明の他の塗装工程を示す側面図である。
【図５】この発明の他の凹凸模様を形成する方法を示した側面図である。
【図６】この発明の繊維補強セメント板の粒子状物質の付着状態を示す拡大断面図である。
【符号の説明】
３…繊維補強セメント板の配合原料
４…製板された繊維補強セメント板
９…第一のシーラ
１０…砂散布装置
１１…粒子状物質
１１ａ…天然石風の凹凸模様
１１ｂ…煉瓦積様の目地溝模様
１３…第二のシーラ
１４…上塗り塗料[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a surface patterning method for a fiber-reinforced cement board.
[0002]
[Prior art]
Fiber reinforced cement boards are very widely used as building materials for exterior walls. Since these fiber-reinforced cement boards are as they are, the surface is smooth and the ground color is gray-white to gray-black, and the design is poor. Therefore, various colors or uneven patterns are given to the surface.
[0003]
By the way, lysine coating is known as a coating finish of an outer wall composed of these fiber-reinforced cement boards and the like.
This lysine coating is generally applied by spraying fine sand particles in the paint, and combined with the uneven surface design on the outer wall surface, it has a high-class design with a matte appearance where the fine sand particles are raised on the surface It is generally preferred as a thing.
[0004]
[Problems to be solved by the invention]
However, this lysine paint is difficult to produce in a factory-productive manner due to the nature of the paint, such as the blended sand particles, and the appearance of the finished product. There is a problem that a feeling of feeling and a natural base material cannot be obtained.
[0005]
Further, in the past, fiber reinforced cement boards that have been subjected to such lysine coating, particularly surface decoration with a non-uniform distribution of sand particles, have not been implemented at the factory.
[0006]
In view of the above problems, the present invention produces a surface texture full of lysine-like luxury with high efficiency in terms of factory production rather than on-site painting, and further provides a natural texture by distributing sand grains unevenly. This was made for the purpose of obtaining a surface patterning method for a fiber-reinforced cement board material.
[0007]
[Means for Solving the Problems]
That is, according to the surface patterning method of the fiber-reinforced cement board material of the invention of the first aspect, the first sealer coating is performed on the surface of the fiber-reinforced cement board material that has been pressed after the plate making and primary cured and cured, and before the coating film is dried. Particulate matter is sprayed and adhered unevenly, and after the sealer coating is dried, the fiber-reinforced cement board is autoclaved, and then a second sealer is applied to the surface. is there.
[0008]
According to this method, a lysine spray-like appearance substrate is formed on the surface of the fiber-reinforced cement board by the particulate matter adhered and fixed to the first sealer paint in a non-uniform distribution, and further, the surface is colored to give a high-quality lysine tone. It is excellent in feeling and can be industrially implemented with a cosmetic appearance that is similar to a natural stone due to the uneven distribution of sand grains.
[0009]
In addition, the fiber reinforced cement board in the above uses what was obtained by arbitrary manufacturing methods, such as an extrusion method, a papermaking method, a dry-type manufacturing method, and a casting method.
According to the invention of claim 2, the press is a concavo-convex pattern press in the above invention, and after the entire top coat is dried, only the convex pattern surface is coated by a roll coater.
[0010]
According to this invention, since only the convex surface is selectively coated, lysine-like makeup having the uniqueness of the convex surface can be easily implemented in industrial production.
According to a third aspect of the present invention, in the above invention, the particulate matter is colored particles, and the entire top coat is a clear coating.
[0011]
According to the present invention, a complicated pattern is obtained by particulate matter having different colors, and the colored pattern of these particulate matter appears as an appearance by the clear coating of the surface. A stone-like appearance pattern can be obtained by industrial means.
[0012]
Here, clear coating includes colorless and transparent as well as colored and transparent.
According to a fourth aspect of the present invention, a color pigment is added to the blended material of the fiber reinforced cement board in each of the above inventions.
[0013]
According to this invention, since the base material itself is also colored, a more complex color combination is obtained in addition to the color of the colored particles attached to the surface, and as a result, a pattern closer to the appearance of a real natural stone is obtained. Is obtained by industrial means.
[0014]
【Example】
Next, examples of the present invention will be described.
In addition, as a manufacturing method of the fiber reinforced cement board of this invention, arbitrary manufacturing methods, such as an extrusion molding method, a papermaking method, a dry-type manufacturing method, a casting method, can be applied, but what is called a flow-on molding method is demonstrated below.
Example 1
As shown in FIG. 1, a cement slurry 3 was supplied onto a felt belt 2 equipped with a suction dewatering device 1, and a fiber-reinforced cement board 4 having a thickness of 20 mm and a width of 450 mm was made while suction dewatering.
[0015]
The fiber-reinforced cement board 4 was cut every 3,000 mm with a cutter 5 and pressed with a press board 6 to smooth the surface. This fiber-reinforced cement board 4 was primarily cured at room temperature for 12 hours.
[0016]
As shown in FIG. 2, the fiber reinforced cement board 4 is transferred by a conveyor 7 and a first coater 9 of acrylic emulsion system is uniformly applied to the surface by a flow coater 8 at 50 g / m ² , and then the first sealer is applied. while 9 is not cured and dried, the maximum particle size in a sand sprayer 10 which is disposed a baffle plate 10a is 2mm or less, the particulate matter 11 consisting of sand having an average particle size of ^{1mm 600g / m 2 ~300g / m} 2 range The baffle plate 10a was reciprocated as indicated by the arrows so as to have a non-uniform distribution.
[0017]
Next, the sealer was dried and cured, and the particulate matter 11 was adhered and fixed.
Then, high temperature high pressure curing was performed for 8 hours by an autoclave, and the strength of the fiber reinforced cement board 4 main body was expressed.
[0018]
Then, an acrylic emulsion-based second sealer coating was performed on the entire surface, and after drying, a top coating was further applied and dried to obtain a product.
Example 2
A fiber-reinforced cement board 4 having a thickness of 20 mm and a width of 450 mm was formed in the same manner as in Example 1, and a natural stone-like uneven pattern 11A (FIG. 3 (a)) as shown in FIGS. Two kinds of uneven patterns of a joint groove-like joint pattern 11B (FIG. 3 (b)) were added. Thereafter, primary curing was performed.
[0019]
As shown in FIG. 4, the fiber reinforced cement board 1 is transported by a conveyor 7, and an acrylic emulsion-based sealer 9 is uniformly applied to the surface of the convex portion by a roll coater 8a at 50 g / m ² on the surface. Before drying and hardening, sand particles 6 having the same particle diameter as in Example 1 were sprayed on the surface in a non-uniform dispersion state using a sand spreader 5.
[0020]
Next, the paint is dried and subjected to high temperature and high pressure curing by an autoclave to express the plate material strength. After the acrylic second sealer paint is applied to the entire surface using a flow coater as in Example 1, it is dried and further overcoated and dried. Only the surface of the convex part was colored and coated with a roll coater.
Example 3
In the same manner as in Example 1, a fiber reinforced cement board 4 after primary curing in which particulate matter 6 is adhered and fixed on the surface in a non-uniform distribution is obtained, and thereafter, high-temperature and high-pressure curing is performed by an autoclave as in Example 1 to increase the strength of the board. As shown in FIG. 5, a brick-like joint groove pattern 11d having a width of 10 mm, a depth of 4 mm, a length of 50 mm, and a width of 150 mm was ground on the surface.
[0021]
Next, sealer coating and top coating were applied to the entire surface of the fiber reinforced cement board, the coating was dried, and only the convex surface was colored and coated with a roll coater to obtain a product.
Example 4
A fiber reinforced cement board product that is coated with a sealer on the entire surface and colored with a roll coater only on the convex parts after router processing, as in Example 3, except that a coloring material with a pigment added to the compounding material of the fiber reinforced cement board is used. Got.
When the surface of the fiber reinforced cement board 1 obtained in Examples 1 to 4 was observed, Examples 1 and 2 were smooth surfaces with a mottled lysine base or a natural stone-like decorative surface, and Example 3 was natural stone. Of the concavo-convex pattern of the wind or the concavo-convex pattern of the brick joint, the concave pattern portion is flat, and the surface of the convex pattern has a very high-grade appearance configuration based on the lysine-tone ground, and Example 4 was ground. The color of the surface of the concave pattern and the color of the surface of the convex pattern have a contrast and have a more excellent appearance configuration. Furthermore, the non-uniform distribution of sand grains gives a more realistic texture.
[0022]
Moreover, when the fiber reinforced cement board of each Example was cut | disconnected and the surface part was expanded and observed, the particulate matter 11 adheres to the surface of the fiber reinforced cement board 4 with the 1st sealer 9 as typically shown in FIG. Further, it was observed that the surface was covered and firmly held by the second sealer 13 and the top coating 14.
[0023]
【The invention's effect】
As described above, according to the method of the present invention, a lysine-like makeup surface obtained by spraying a paint compounded with fine sand particles can be mass-produced in a factory production, and lysine has been troublesome in conventional construction. The decorative face can be obtained industrially in large quantities and at low cost.
[0024]
Further, the adhered particles are surely held on the surface of the fiber reinforced cement board by the sealer and the top coat, and therefore, the particles are not easily peeled off and have an effect of maintaining a good appearance over a long period of time.
[Brief description of the drawings]
FIG. 1 is a side view showing a manufacturing process of a fiber-reinforced cement board according to the present invention.
FIG. 2 is a side view showing a painting process of the present invention.
FIG. 3 is an explanatory cross-sectional view of an embodiment of a concavo-convex press according to the present invention, where (a) shows a natural stone-like concavo-convex pattern and (b) shows a brick joint concavo-convex pattern.
FIG. 4 is a side view showing another painting process of the present invention.
FIG. 5 is a side view showing a method for forming another uneven pattern according to the present invention.
FIG. 6 is an enlarged cross-sectional view showing the adhering state of particulate matter on the fiber-reinforced cement board of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 3 ... Compound raw material of fiber reinforced cement board 4 ... Made fiber reinforced cement board 9 ... First sealer 10 ... Sand spreader 11 ... Particulate matter 11a ... Natural stone-like uneven pattern 11b ... Brick-like joint groove Pattern 13 ... Second sealer 14 ... Top coat

Claims (4)

製板後プレスし一次養生硬化させた繊維補強セメント板材表面に第一のシーラ塗装を行い、該塗膜の乾燥前に粒子状物質を不均一に散布して付着させ、前記シーラの乾燥後前記繊維補強セメント板材をオートクレーブ養生し、次いで表面に第二のシーラ塗装をし、乾燥後さらに全面上塗り塗装する繊維補強セメント板の化粧方法。A first sealer coating is applied to the surface of the fiber reinforced cement plate material that has been pressed and primarily cured after plate making, and the particulate matter is non-uniformly dispersed and adhered before the coating film is dried. A method for making a fiber-reinforced cement board, in which a fiber-reinforced cement board material is cured by autoclave, and then a second sealer is applied to the surface, followed by further overcoating after drying. プレスが凹凸模様プレスとされ、また、全面上塗り塗装し乾燥後、凸部模様の表面のみにロールコータにより塗装する請求項１の繊維補強セメント板の化粧方法。The method for applying a fiber-reinforced cement board according to claim 1, wherein the press is a concavo-convex pattern press, and the entire surface is overcoated and dried, and then only the surface of the convex pattern is applied by a roll coater. 粒子状物質が着色粒子であり、全面上塗り塗料がクリヤー塗料である請求項１または２の繊維補強セメント板の化粧方法。3. The method for making a fiber-reinforced cement board according to claim 1 or 2, wherein the particulate matter is colored particles, and the entire top coat is a clear paint. 繊維補強セメント板の配合材料中に着色顔料が添加されてなる請求項１、２または３に記載の繊維補強セメント板の化粧方法。The cosmetic method for a fiber-reinforced cement board according to claim 1, 2, or 3, wherein a coloring pigment is added to the compounding material of the fiber-reinforced cement board.

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