JP4264692B2

JP4264692B2 - How to paint building materials

Info

Publication number: JP4264692B2
Application number: JP2002055120A
Authority: JP
Inventors: 孝之榎本
Original assignee: Kubota Matsushitadenko Exterior Works Ltd
Current assignee: KMEW Co Ltd
Priority date: 2002-03-01
Filing date: 2002-03-01
Publication date: 2009-05-20
Anticipated expiration: 2022-03-01
Also published as: JP2003251267A

Description

【０００１】
【発明の属する技術分野】
この発明は建材の塗装方法に関する。
【０００２】
【従来の技術】
建材として広く使用されている繊維補強セメント板は、そのままであると表面の地色が灰白〜灰黒色で意匠性に乏しいため、表面防水性付与を兼ねて各種色彩による装飾を施すことが行われる。
【０００３】
ところで、これら建材として、表面に各種の凹凸模様を付すことが行われ、この種建材に対する塗装手段としてスプレーガンを用いた塗装方式が広く知られている。
【０００４】
この、スプレーガンを用いた塗装方式において、多数のスプレーガンを建材の移送方向に対して直交する方向に配列し、板材の移送と共に適宜スプレーから制御信号に基づき間欠的ないしは連続的に塗料を噴射して建材表面に着色塗装することが行われる。
【０００５】
【発明が解決しようとする課題】
しかしながら、上記の塗装方式におけるスプレーガンの噴射パターンの制御は建材表面の凹凸模様の態様とは関係無く行われていたため、表面模様が不自然な違和感のあるの仕上がりとなっていた。
【０００６】
即ち、凹凸模様による凹凸感は、光の陰影によって立体的に感じるが、影の部分より濃い色で凹凸表面の任意場所に塗装してしまうと、影が視覚的に消されてしまい、この結果立体感が損なわれると同時に、天然石に見られる色ムラ、色の変化、素材感の感じられない仕上がりとなる問題があった。
【０００７】
この発明は、上記問題点を解消し、凹凸模様のある建材に塗装をする場合、凹凸模様と色彩濃度とが合致した塗装を容易に実現することを課題としてなされたものである。
【０００８】
【課題を解決するための手段】
即ち、請求項１の建材の塗装方法は、多数配列されたスプレーガンをコンピュータ制御してベース塗装を施した凹凸を有する建材表面の任意の場所に塗装する方法において、塗布直後の塗料が塗布面に沿って容易に流れる塗料であり、イワタカップによる粘度測定値が２５℃、１０〜３５秒とされた低粘度、低顔料成分の塗料を、凹凸模様を有する建材表面に吹き付け、塗料の乾燥前に前記塗料を凹部に流下させることにより凹部の色彩を凸部頂部より濃くするように塗装するものであって、ベース塗装を施した建材表面の凹凸模様をスキャンニングすることによって三次元データとして読み込み、この三次元データに基づいて前記スプレーガンから前記塗料を噴射し、建材表面の凹凸模様のパターンにあわせた塗布量とすることを特徴とするものである。
【０００９】
従って、この発明の方法によれば、多数のスプレーガンをコンピュータ制御により、ベース塗装を施した凹凸を有する建材表面の任意の場所に塗装する場合、塗布パターンと凹凸模様の位置にずれがあっても、凹凸模様の突部は薄く、凹部は濃く塗装されるので、特に凹凸模様のパターンを読み取って、これにあわせた塗布量とする場合に、両者にずれがあっても凹凸模様の立体感に優れる塗装が容易に実施可能となる。
【００１１】
２５℃におけるイワタカップによる粘度測定値が１０〜３５秒と限定するのは、１０秒より短い時間であると粘度が低すぎ、塗料の凹部底面への流下量が多くなり過ぎ、建材表面の着色が十分でなくなるためである。
【００１２】
一方、３５秒より長い時間であると、粘度が高すぎ、凸部から凹部へ向けての塗料の流下が生じ難くなり、凸部は薄く、凹部は濃くするといった目的が達成できなくなるからである。また、塗料の隠蔽力も強くなり、凹凸の陰影差が出なくなると共に、スプレーノズルによる塗料の細かい霧化が困難となり、均一な塗装が難しくなるからである。
【００１３】
請求項２の建材の塗装方法は、請求項１における塗料が、塗料１００部に対し樹脂成分１５〜３０部、顔料０．１５〜５．０部、及び添加剤０．１〜２部、残部が水などの溶剤とされてなることを特徴とするものである。
【００１４】
塗料の配合について規定したものであつて、塗料１００部に対し樹脂成分１５〜３０部とするのは、樹脂成分が１５部より少ないと、塗装面の顔料の保持が悪く、着色が困難となるからである。また３０部より多くすると塗料の粘性が増し凹凸表面に沿って塗料が流れ落ち難くなると共に、凹凸の陰影差が出難くなる。また、トりうの濃度が高くなり、スプレーノズルが詰まりやすくなり、塗装が困難となる。
【００１５】
顔料を０．１５〜５．０部とするのは、０．１５部より少なくすると、塗料の隠蔽力、発色性が悪くなり、５．０部より多くすると、隠蔽力が強くなりすぎ、凹凸面に塗料を塗布しても陰影の濃淡の差が出なくなるからである。
【００１６】
添加剤は、消泡剤、表面調整剤、防腐剤やｐＨ調整剤などを言い、塗料の性質を改善するものである。ここに消泡剤は塗料の泡カミ性を改善するものである。また、表面調整剤は、塗料の接触角を小さく濡れ性を良くし、これによってベース面に対して塗料の広がり性を良くして濃淡を発生しやすくするためのものである。ｐＨ調整剤は樹脂の安定性維持と腐敗防止のために添加されるものである。
【００１７】
そして上記各添加剤の配合割合は、添加剤のみの全体１００部に対し、消泡剤１５部、表面調整剤５０部、防腐剤１０部、ｐＨ調整剤２５部などの配合割合とされる。
【００１８】
この添加剤全体の塗料に対する添加量を０．１部より少なくすると塗料の泡かみや濡れ性の改善が十分になされず、塗膜の均一性が悪くなる。一方、２部より多くしてもそれほどの添加に見合った改善は見られず無駄となる。
【００１９】
残部の水は、上記配合範囲の結果８４．７５〜６３部となるが、水の添加量を８４．７５部より多くすると顔料、樹脂の添加量が相対的に減少し、隠ぺい力が得られなかったり、流れ性が良くなリ過ぎて、着色が十分に行えなくなる問題が生じる。
【００２０】
また、６３部より少なくすると顔料、樹脂の添加量が相対的に増加し、隠蔽力が強すぎて陰影の差が出来難くなり、さらに粘度が上昇しすぎて、スプレーの目詰まりを起こし塗装が困難となる問題がある。
【００２１】
【発明の実施例】
次にこの発明の実施例について説明する。
塗料の樹脂系成分としてアクリル樹脂、顔料として酸化鉄系顔料、酸化チタン系顔料、カーボンブラック系顔料、添加剤として消泡剤、表面調整剤、防腐剤及びｐＨ調整剤、溶媒として水を用意し表1の配合として塗料を調整した。
【００２２】
なお、添加剤としては、全体が１００部に対し、消泡剤１５部、表面調整剤５０部、防腐剤１０部、ｐＨ調整剤２５部の配合としたものを用いた。
【００２３】
【表１】

表１に示した配合の塗料で凹凸差３ミリの大小凹凸模様が均一分散状に形成された補強セメント板にスプレーにより塗装した。
【００２４】
この結果、実施例１〜３については、顔料の隠蔽力に程度の差こそあれ、塗装直後に凸部から流れる塗料によって凸部は薄く凹部は濃い塗装面の仕上がりとなり、立体感のある化粧塗装面となった。
【００２５】
一方、比較例１は、溶剤としての水の添加量が多いこと、樹脂の添加量が少ないことより塗料による隠蔽力が殆どなく、そのことから塗装効果そのものが感じられなかった。
【００２６】
比較例２は、塗料が濃すぎ、スプレーによる細かい霧状の吹き付けが困難となり、均一塗装が困難となった上、塗装された塗料も凹凸表面に沿って流下することなく、斜面に塗布された状態で強い隠蔽力を発揮するので、せっかくの凹凸模様の高低変化さえ印象を薄くしてしまっていた。
【００２７】
なお、上記実施例１〜３及び比較例１、２に示した塗料を用い、建材表面の凹凸模様をスキャンニングすることによって三次元データとして読み込み、このデータに基づいて多数配列されたスプレーガンから塗料を噴射して塗装を行う塗装装置に供給し、同様に塗装したところ、三次元データに基づく色分けと、凹凸模様に従って流れる塗料による濃淡とが相乗してそれぞれの外観は、それぞれ表１と同様な結果となった。
【００２８】
また、上記実施例において、溶剤として水を使用した水系塗料の場合を説明したが、溶剤系塗料についても同様に適用できることは言うまでもない。また、溶剤系塗料は、含まれる溶剤によって接触角の十分小さいものがあるため、この場合は添加剤中、表面調整剤は添加しなくても良い場合がある。
【００２９】
【発明の効果】
この発明は以上のように構成したので、アトランダムな表面凹凸模様を有する建材であっても、その凹凸面に単なるスプレー塗装をするだけで凹凸模様の高低変化にマッチしたグラデーション塗装が得られ、凹凸変化の外観を強調する塗装が容易に実施できる効果を有する。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for painting a building material.
[0002]
[Prior art]
If the fiber reinforced cement board widely used as a building material is left as it is, the ground color of the surface is gray-white to gray-black, and it is poor in design, so it is decorated with various colors to provide surface waterproofing .
[0003]
By the way, as these building materials, various uneven patterns are given to the surface, and a coating method using a spray gun is widely known as a coating means for this kind of building materials.
[0004]
In this painting method using a spray gun, a large number of spray guns are arranged in a direction orthogonal to the transfer direction of building materials, and paint is sprayed intermittently or continuously based on control signals from the spray as appropriate along with the transfer of plate materials. The building material surface is then colored and painted.
[0005]
[Problems to be solved by the invention]
However, since the spray pattern of the spray gun in the above-described coating method is controlled regardless of the uneven pattern of the building material surface, the surface pattern has an unnatural and uncomfortable finish.
[0006]
That is, the impression of unevenness due to the uneven pattern is felt three-dimensionally by the shadow of light, but if the paint is painted in an arbitrary place on the uneven surface with a color darker than the shadow, the shadow is visually erased. At the same time as the three-dimensional effect was impaired, there was a problem that the color unevenness, the color change, and the feel of texture that are seen in natural stones could not be felt.
[0007]
An object of the present invention is to solve the above-mentioned problems and to easily realize a coating in which the concavo-convex pattern and the color density match when the building material having the concavo-convex pattern is applied.
[0008]
[Means for Solving the Problems]
That is, the method for painting a building material according to claim 1 is a method in which a plurality of spray guns are computer-controlled to paint on an arbitrary place on the surface of a building material having an uneven surface to which a base coating is applied. A low-viscosity, low-pigment component paint whose viscosity measured by an Iwata cup is 25 ° C. and 10 to 35 seconds is sprayed onto the surface of a building material having an uneven pattern before the paint is dried. The paint is made to flow down into the recess to make the color of the recess darker than the top of the projection, and is read as three-dimensional data by scanning the uneven pattern on the base coating surface. based on the three-dimensional data to injecting the paint from the spray gun, to characterized in that the coating amount to match the pattern of the uneven pattern of the building material surface It is intended.
[0009]
Therefore, according to the method of the present invention, when a large number of spray guns are applied by computer control to any place on the surface of the building material having irregularities that have been subjected to base coating, there is a difference between the positions of the application pattern and the irregular pattern. However, since the projections on the concavo-convex pattern are thin and the recesses are darkly painted, especially when the concavo-convex pattern is read and applied in accordance with this pattern, the three-dimensional effect of the concavo-convex pattern even if there is a deviation between the two This makes it possible to easily perform coating with excellent quality.
[0011]
25 the viscosity measurements by Iwata cup definitive in ℃ to limit 10 to 35 seconds, the viscosity is too low and than a short time of 10 seconds, too many falling amount to recess bottom surface of the paint, building materials surface This is because coloring is not sufficient.
[0012]
On the other hand, if the time is longer than 35 seconds, the viscosity is too high, and it is difficult for the paint to flow down from the convex part to the concave part, and the purpose of making the convex part thin and the concave part dark cannot be achieved. . In addition, the concealing power of the paint also becomes strong, and the difference in shading between the projections and depressions does not appear, and it becomes difficult to atomize the paint with a spray nozzle and uniform painting becomes difficult.
[0013]
Coating method according to claim 2 building materials, paints definitive to claim 1, 15 to 30 parts of the resin component to 100 parts paint, pigment 0.15 to 5.0 parts, and additives 0.1 to 2 parts, The remaining part is a solvent such as water.
[0014]
The composition of the paint is specified, and the resin component is 15 to 30 parts with respect to 100 parts of the paint. If the resin component is less than 15 parts, the pigment on the painted surface is poorly retained and coloring becomes difficult. Because. On the other hand, when the amount is more than 30 parts, the viscosity of the coating increases, and it becomes difficult for the coating to flow along the uneven surface, and it becomes difficult for the unevenness of the unevenness to appear. In addition, the concentration of trout is increased, the spray nozzle is easily clogged, and coating is difficult.
[0015]
If the amount of the pigment is 0.15 to 5.0 parts, if the amount is less than 0.15 parts, the hiding power and color developability of the paint deteriorate, and if the amount is more than 5.0 parts, the hiding power becomes too strong and the unevenness is increased. This is because even if paint is applied to the surface, there is no difference in shading.
[0016]
Additives refer to antifoaming agents, surface conditioners, preservatives, pH adjusters, and the like, and improve the properties of paints. Here, the antifoaming agent is for improving the foaming resistance of the paint. The surface conditioner is for reducing the contact angle of the paint and improving the wettability, thereby improving the spreadability of the paint with respect to the base surface and facilitating the generation of shading. The pH adjuster is added to maintain the stability of the resin and prevent spoilage.
[0017]
And the mixture ratio of each said additive is made into mixture ratios, such as 15 parts of antifoamers, 50 parts of surface adjusters, 10 parts of preservatives, and 25 parts of pH adjusters, with respect to 100 parts of the additive alone.
[0018]
If the total amount of the additive added to the paint is less than 0.1 part, the foaming and wettability of the paint are not sufficiently improved, and the uniformity of the coating film is deteriorated. On the other hand, even if it exceeds 2 parts, the improvement corresponding to the addition is not seen, and it is useless.
[0019]
The balance of water is 84.75 to 63 parts as a result of the above blending range. However, when the amount of water added is more than 84.75 parts, the amount of pigment and resin added is relatively reduced, and a hiding power is obtained. Or the flowability is too good, and there is a problem that coloring cannot be performed sufficiently.
[0020]
On the other hand, if the amount is less than 63 parts, the amount of pigment and resin added is relatively increased, the hiding power is too strong, and it becomes difficult to make a difference in shadow, and the viscosity increases too much, causing the clogging of the spray and painting. There is a problem that becomes difficult.
[0021]
DETAILED DESCRIPTION OF THE INVENTION
Next, examples of the present invention will be described.
Prepare acrylic resin as resin component of paint, iron oxide pigment, titanium oxide pigment, carbon black pigment as pigment, defoamer, surface conditioner, preservative and pH adjuster as additive, and water as solvent. The paint was prepared as shown in Table 1.
[0022]
The additive used was a mixture of 15 parts of an antifoaming agent, 50 parts of a surface conditioner, 10 parts of a preservative and 25 parts of a pH adjuster with respect to 100 parts as a whole.
[0023]
[Table 1]

A reinforced cement board in which large and small concavo-convex patterns with a difference in concavo-convex of 3 mm were uniformly formed with the coating composition shown in Table 1 was applied by spraying.
[0024]
As a result, for Examples 1 to 3, the degree of difference in the hiding power of the pigment varies, and the paint flowing from the convex portion immediately after coating causes the convex portion to be thin and the concave portion to be a dark finish, resulting in a three-dimensional makeup coating. Became a face.
[0025]
On the other hand, in Comparative Example 1, since the amount of water as a solvent was large and the amount of resin was small, there was almost no hiding power by the paint, and thus the coating effect itself was not felt.
[0026]
In Comparative Example 2, the paint was too dark, making it difficult to spray a fine mist by spraying, making uniform coating difficult, and the painted paint was applied to the slope without flowing down along the uneven surface. The strong hiding power was exhibited in the state, so even the high and low changes of the uneven pattern made the impression thin.
[0027]
In addition, using the paints shown in the above Examples 1 to 3 and Comparative Examples 1 and 2, by reading the uneven pattern on the surface of the building material, it is read as three-dimensional data, from a plurality of spray guns arranged based on this data When the paint is sprayed and supplied to a painting device that paints in the same manner, the color appearance based on the three-dimensional data and the shade of the paint flowing according to the uneven pattern are synergistic, and the appearance of each is the same as in Table 1 It became a result.
[0028]
Moreover, in the said Example, although the case of the water-system paint which used water as a solvent was demonstrated, it cannot be overemphasized that it can apply similarly to a solvent-type paint. Further, since some solvent-based paints have a sufficiently small contact angle depending on the solvent contained, in this case, it may not be necessary to add a surface conditioner in the additive.
[0029]
【The invention's effect】
Since this invention is configured as described above, even a building material having an at-random surface uneven pattern, a gradation coating that matches the height change of the uneven pattern can be obtained by simply spraying the uneven surface, It has the effect that the painting which emphasizes the external appearance of uneven | corrugated change can be implemented easily.

Claims

Is arrayed a spray gun with computer controlled in a method of painting anywhere building material surface having irregularities subjected the base paint, a paint coating material immediately after coating can easily flow along the coated surface, Iwata cup By spraying a low-viscosity, low-pigment component paint having a measured viscosity value of 25 ° C. and 10 to 35 seconds on the surface of the building material having a concavo-convex pattern, the paint is allowed to flow into the recesses before the paint is dried. It is applied to make the color darker than the top of the convex part, and is read as three-dimensional data by scanning the uneven pattern on the surface of the base material on which the base coating has been applied, and from the spray gun based on this three-dimensional data A method of coating a building material, characterized in that the coating material is sprayed to obtain a coating amount that matches the pattern of the uneven pattern on the surface of the building material.

The coating material according to claim 1 is composed of 15 to 30 parts of resin component, 0.15 to 5.0 parts of pigment, 0.1 to 2 parts of additive, and a remaining solvent such as water for 100 parts of coating material. A method of painting building materials characterized by