Film thickness reference piece

Abstract

To provide a film thickness reference piece that serves as a standard for the thickness of a coating film without damaging the coating film.SOLUTION: The film thickness reference piece is used to form a coating film on a painted object. The film thickness reference piece has a thickness equal to or less than the thickness of the coating film and is placed on the painted object to serve as a reference for the thickness of the coating film.

Description

[Technical Field]

[0001] The present invention relates to a film thickness reference piece that is placed on a part to be painted in advance and used as a reference for the thickness of the paint film on the part to be painted by painting over it. [Background technology]

[0002] When painting, it is necessary to control the thickness of the paint film, and urethane paint is particularly used to form a waterproof layer on roofs. When painting with urethane, it is difficult to control the thickness of the paint film by visual inspection.

[0003] Therefore, conventional methods for managing the thickness of a paint film include calculating the thickness from the amount of paint used per unit area. While this method can calculate the average thickness of the paint film, it does not calculate the thickness of a specific location, and unevenness in the paint may be overlooked.

[0004] In particular, in the case of a coating called urethane waterproofing, since the coating is applied at a gradient, there is a high possibility of uneven coating, and problems may arise due to insufficient thickness of the coating film.

[0005] In view of this, Japanese Patent Laid-Open Publication No. 2006-184147 discloses a film thickness inspection device used to inspect the thickness of a coating film formed on floors and walls of buildings, roads, etc., and includes a needle that is pierced into a coating film to be inspected for thickness equal to or greater than a predetermined value, a slider through which the needle is inserted and configured to be slidable in the axial direction relative to the needle, a biasing means that biases the slider toward the tip of the needle, an energization switch that switches between energization and non-energization by the sliding of the slider, and an alarm that emits light or sound when energized by the energization switch to notify that the coating film has the predetermined thickness, thereby enabling management of whether the thickness of the coating film is equal to or greater than a predetermined thickness.

[0006] However, since the above-mentioned film thickness inspection device inspects the thickness of the coating film after the coating process is completed, if the coating film is found to be insufficient in thickness, the coating must be repainted.Furthermore, since the needle is pierced through the coating film to be inspected, the needle damages the coating, and the damaged area must be repainted. [Prior art documents] [Patent documents]

[0007] Japanese Patent Application Laid-Open No. 2006-184147 Summary of the Invention [Problem to be solved by the invention]

[0008] The present invention has been made in view of the above-mentioned circumstances, and an object of the present invention is to provide a film thickness standard piece that serves as a standard for measuring the thickness of a coating film without damaging the coating film. [Means for solving the problem]

[0009] In order to solve the above problem, the film thickness reference piece of the first aspect is a film thickness reference piece used when forming a coating film on a part to be painted, and the film thickness reference piece has a thickness equal to or less than the thickness of the coating film, and is placed on the part to be painted to serve as a standard for the thickness of the coating film.

[0010] In order to solve the above problem, the film thickness reference piece of the second aspect is a film thickness reference piece used when forming a coating film on a part to be painted, and the film thickness reference piece has a circular shape in a plan view and a thickness equal to or less than the thickness of the coating film, and is placed on the part to be painted to serve as a reference for the thickness of the coating film.

[0011] In order to solve the above-mentioned problem, the film thickness reference piece of the third aspect is a film thickness reference piece used when forming a paint film on a part to be painted, and the film thickness reference piece has a polygonal shape in a plan view and a thickness equal to or less than the thickness of the paint film, and is placed on the part to be painted to serve as a reference for the thickness of the paint film.

[0012] In order to solve the above-mentioned problems, the film thickness reference piece according to a fourth aspect is the same as any one of the first to third aspects, and is made of urethane resin.

[0013] In order to solve the above-mentioned problems, the film thickness reference piece of a fifth aspect is any of the first to fourth aspects, which is made of urethane resin and has a thickness of 1.4 to 1.6 mm. [Effects of the Invention]

[0014] The present invention is constructed and operates as described above, and can provide a film thickness standard piece that serves as a standard for measuring the thickness of a coating film without damaging the coating film. [Brief explanation of the drawings]

[0015] [Figure 1] 1A is a plan view of the film thickness reference piece of the first embodiment, and FIG. [Figure 2] 1A is a plan view of a film thickness reference piece according to a second embodiment, and FIG. [Figure 3] 10A is a plan view of a film thickness reference piece according to a third embodiment, and FIG. [Figure 4] A is a plan view of the state of a urethane waterproofing rising material applied to a roof. B is a cross-sectional view of A taken along line IVB-IVB. [Figure 5] 1A is a plan view of the state in which the film thickness reference piece of the first embodiment is placed on a urethane waterproofing rising material on a roof, and FIG. 1B is a cross-sectional view of A taken along line VB-VB. [Figure 6] Figure 1A is a plan view of the first coat of urethane paint applied to the first example of the coating thickness standard piece placed on a urethane waterproofing rising material on a roof. Figure 1B is a cross-sectional view of Figure 1A taken along line VIB-VIB. [Figure 7] A is a plan view of the product after a second coat of urethane paint has been applied. B is a cross-sectional view of A taken along line VIIB-VIIB.

[0016] A first example of a coating thickness reference piece 10 will be described below with reference to the illustrated embodiment. The first example of a coating thickness reference piece 10 is used to form a waterproof layer made of a coating film on a target area to be painted, such as the rooftop R of a building. The coating thickness reference piece 10 of the first example is placed on the target area, the rooftop R of a building, and a coating material that forms a coating film is applied over the coating thickness reference piece 10, thereby covering the coating thickness reference piece 10 of the first example, which has a thickness T, and providing a reference for whether the coating thickness T2 of the coatings Z1 and Z2 of the waterproof layer is sufficiently thick.

[0017] Specifically, the thickness reference piece 10 of the first embodiment is placed on the rooftop R of a building. The paint constituting the coating film is then applied over the thickness reference piece 10. The applied paint then covers the thickness reference piece 10 placed on the rooftop. Meanwhile, the thickness reference piece 10 has a thickness T that is less than the thickness T2 of the waterproofing layer coatings Z1 and Z2. Therefore, once the thickness reference piece 10 is covered by the coatings Z1 and Z2, the thickness T2 of the waterproofing layer coatings Z1 and Z2 will be greater than the predetermined thickness T of the thickness reference piece 10. Since the thickness T of the thickness reference piece 10 is less than the thickness T2 of the waterproofing layer coatings Z1 and Z2, the thickness T of the thickness reference piece 10 is set as the minimum thickness required for the waterproof layer. By applying the paint over the thickness reference piece 10 so that the thickness reference piece 10 is covered, the thickness T of the thickness reference piece 10 can be used as a reference for the thickness T2 of the waterproofing layer coatings Z1 and Z2. Furthermore, by painting the thickness reference piece 10 so that it is covered by the coatings Z1 and Z2, the thickness T2 of the waterproofing layer coatings Z1 and Z2 can be made sufficient to provide waterproofing (see Figure 7B). Furthermore, by visually confirming that the thickness reference piece 10 is covered by the waterproofing layer coatings Z1 and Z2, it is possible to confirm that waterproofing has been ensured. In particular, when the thickness reference piece 10 is covered and hidden by the waterproofing layer coatings Z1 and Z2, making it impossible to visually confirm that the thickness reference piece 10 is buried, it is possible to confirm that the thickness T2 of the waterproofing layer coatings Z1 and Z2, which will be described later, has been sufficiently ensured. In this way, when the thickness reference piece 10 is buried and no longer visible, it is possible to visually confirm that the thickness T2 of the coating has been sufficiently ensured. This also applies to the thickness reference piece 12 of the second embodiment, the thickness reference piece 13 of the third embodiment, and the thickness reference piece 14 of the fourth embodiment, which will be described later. The predetermined thickness T will also be described later.

[0018] The film thickness reference piece 10 of the first embodiment is preferably circular in plan view. Since it has no corners, it is less likely to get caught during painting work, and peeling off during the painting work can be prevented.

[0019] The thickness reference block 10 of the first embodiment is preferably made of the same paint as the waterproofing layer on the building roof. For example, the paint that makes up the waterproofing layer is preferably a urethane resin paint. If such a urethane resin paint is used, the thickness reference block 10 is preferably made of that urethane resin. For example, a urethane resin is preferably made by polymerizing a polyamine, a curing agent for polyether or polyester polyols, with a polyisocyanate compound to form a prepolymer with isocyanate groups at the terminals, and then reacting the isocyanate groups with the polyol as a crosslinking agent. Isocyanate groups are highly reactive, and their effect progresses without heating, forming a very stable structure once reacted.

[0020] The predetermined thickness T of the thickness reference piece 10 of the first embodiment is preferably equal to or less than the thickness T2 of the coatings Z1 and Z2 of the waterproofing layer applied to form the waterproof layer on the roof of a building. Furthermore, the predetermined thickness T of the thickness reference piece 10 of the first embodiment is preferably equal to or less than 2 mm, and more preferably equal to or greater than 1.4 mm, to ensure that the thickness T2 of the coatings Z1 and Z2 applied to form the waterproof layer on the roof of a building is 2 mm or more. Furthermore, a thickness T of 1.4 to 1.6 mm is particularly preferable, and 1.5 mm is even more preferable. This thickness T of the thickness reference piece 10 of the first embodiment ensures that the thickness T2 of the coatings Z1 and Z2 of the waterproofing layer is 2 mm or more. This will be discussed further below.

[0021] Next, the film thickness reference piece 12 of the second embodiment will be described. The film thickness reference piece 12 of the second embodiment preferably has an elliptical shape in a plan view. Since there are no corners, peeling during painting can be prevented. The elliptical shape simply has a major axis and a minor axis in a plan view. The material is the same as the film thickness reference piece 10 of the first embodiment, and the thickness T is also the same, so a description thereof may be omitted.

[0022] In addition, the film thickness reference piece 10 of the first embodiment, which is circular when viewed in a plane, and the film thickness reference piece 12 of the second embodiment, which is elliptical when viewed in a plane, are included in the circular shape, and the circular shape also includes a perfect circle, an ellipse, or an oval when viewed in a plane.

[0023] Next, the thickness reference piece 13 of the third embodiment will be described. The thickness reference piece 13 of the third embodiment preferably has a polygonal shape in a plan view. In this case, rounding the corners may prevent peeling during painting. Note that the polygonal shape may be, for example, a triangular, quadrangular, pentagonal, hexagonal, or octagonal shape, as long as it has multiple corners, and it is preferable to round the corners. Note that this does not mean to exclude pieces with unrounded corners. Also, only a hexagonal thickness reference piece 13 is shown in FIG. 3. Furthermore, the material is the same as the thickness reference piece 10 of the first embodiment, and the thickness T is also the same, so description thereof may be omitted.

[0024] Next, we will explain how to use the film thickness reference piece 10 of the first embodiment. The film thickness reference piece 12 of the second embodiment and the film thickness reference piece 13 of the third embodiment are similar, so their usage will be omitted. To use the film thickness reference piece 10 of the first embodiment, first clean the target area to be waterproofed (e.g., the rooftop R of a building). Then, using urethane waterproofing material Z, multiple film thickness reference pieces 10 with a thickness T are attached to the target area (rooftop R). The urethane waterproofing material Z is preferably polyurethane, a flexible and impact-resistant plastic resin that hardens into a rubber-like material through a chemical reaction. Furthermore, it is preferable to attach the film thickness reference pieces 10 at intervals of 2 or 3 meters. However, it is not necessary to use the waterproofing material Z to attach the film thickness reference piece 10 of the first embodiment to the target area (rooftop R); its use is optional. The film thickness reference piece 10 of the first embodiment can be directly attached to the target area (rooftop R) using an adhesive (not shown), or it can be placed directly on the target area (rooftop R).

[0025] Next, urethane coating Z1 is applied to the rooftop R of the building. At this time, urethane coating Z1 is applied to form a coating film on top of the film thickness reference pieces 10 attached to the rooftop R.

[0026] When the urethane coating is applied, the multiple film thickness reference pieces 10 attached become difficult to see due to the urethane coating Z1. Furthermore, in this state, urethane coating Z2 is applied to the rooftop R of the building. As a result, the rooftop R of the building is further covered with urethane coating Z2, which has the same thickness as the multiple film thickness reference pieces 10 attached to the rooftop R (not shown). Furthermore, by applying urethane coating over the multiple film thickness reference pieces 10 attached to the rooftop R, a coating film is formed, and the film thickness reference pieces 10 are covered with the applied urethane coating Z2.

[0027] Normally, after two coats of urethane paint Z1 and Z2 are applied, the film thickness standard piece 10 becomes integrated with the applied urethane paint, and the multiple attached film thickness standard pieces 10 become covered and inconspicuous by the applied urethane paints Z1 and Z2. Note that "covered" does not only mean that the film thickness standard piece 10 is hidden and cannot be seen by the waterproofing layer paints Z1 and Z2, but also includes the case where the film thickness standard piece 10 is buried and cannot be seen by the applied urethane paints Z1 and Z2.

[0028] In this way, when applying urethane waterproofing, the thickness standard piece 10 is attached with urethane waterproofing riser Z, followed by two coats of urethane coating Z1 (the main component) and then urethane coating Z2 (a total of two coats). This covers the thickness standard piece 10, ensuring that the average thickness T2 of the waterproofing layer consisting of the urethane coatings Z1 and Z2 applied to the roof R after the second layer of urethane coating Z2 is at least 2 millimeters. By setting the thickness T of the thickness standard piece 10 to be less than the thickness T2 of the urethane coatings Z1 and Z2 that make up the waterproofing layer, painting the waterproofing layer over the thickness standard piece 10 ensures that the thickness T2 of the urethane coatings Z1 and Z2 that make up the waterproofing layer is sufficient. In other words, by painting the waterproofing layer over the thickness standard piece 10, the thickness T2 of the waterproofing layer coatings Z1 and Z2 will be at least the thickness T of the thickness standard piece 10. It is preferable that the thickness T2 of the urethane waterproofing coating be a design thickness determined, for example, by the owner's request, as will be described later, and that the thickness T of the coating thickness reference piece 10 be set to be equal to or less than that design thickness. Furthermore, the urethane coating applied to the roof R is not limited to being applied twice.

[0029] Therefore, as described above, for example, by setting the thickness T of the thickness standard piece 10 to 1.4 to 1.6 mm, more preferably 1.5 mm, which is less than the thickness T2 of the waterproofing layer coatings Z1 and Z2, and covering the thickness standard piece 10 when the thickness T2 of the urethane waterproofing layer coating made up of urethane coatings Z1 and Z2 is 2 mm or more as described above, the thickness T of the thickness standard piece 10 can be used as a reference for the thickness T2 of the coating, and the thickness T2 of the waterproofing layer coatings Z1 and Z2 can be managed. This is because, with the thickness T of the thickness standard piece 10, the thickness standard piece 10 is covered by the thickness T2 of the coating made up of coatings Z1 and Z2, preventing the risk of the thickness T2 of the waterproofing layer coatings Z1 and Z2 being insufficient. However, as described above, the thickness reference piece 10 of the first embodiment, having a thickness T, is not only covered by the thickness T2 of the waterproofing coatings Z1 and Z2, but also serves as a standard for determining whether the thickness T2 of the waterproofing coatings Z1 and Z2 is sufficient, preventing the possibility of the thickness T2 of the waterproofing coatings Z1 and Z2 being insufficient. Note that when the thickness T of the thickness reference piece 10 is said to be equal to or less than the thickness T2 of the coatings Z1 and Z2, this naturally includes the case where the thickness T of the thickness reference piece 10 and the thickness T2 of the coatings Z1 and Z2 are the same thickness. Furthermore, the size (diameter) of the thickness reference piece 10 is preferably 20 millimeters, but is not limited to this.

[0030] Thus, the thickness reference piece 10 of the first embodiment allows a user to visually confirm that the coating film is covered by the coating film without damaging the coatings Z1 and Z2 applied to the target area, such as the rooftop R of a building, and thus confirm that the coating film has a sufficient thickness T2. By ensuring that the thickness T of the coating reference piece 10 of the first embodiment is equal to or less than the thickness T2 of the waterproofing layer coatings Z1 and Z2, the coating can be used as a reference for ensuring that the coating has been applied properly. Furthermore, even during construction, which was previously difficult to confirm, the coating thickness reference piece 10 of the first embodiment can be visually confirmed to be covered by the thickness T2 of the waterproofing layer coatings Z1 and Z2, thereby preventing poor application of the waterproofing layer. This eliminates the need for post-construction rework, thereby reducing labor and costs. Furthermore, by placing the coating thickness reference piece 10 of the first embodiment over a wide area of ​​the rooftop R, uneven application can be reduced.

[0031] The thickness reference piece 10 used to form the coating on the rooftop R, which is the target area for painting, is thinner than the design thickness of the coating. It is placed on the rooftop R, and when paint is applied to the rooftop R and the thickness reference piece 10, the coating is formed. The design thickness is achieved when the peripheral area of ​​the coating surface of the waterproofing layer coatings Z1 and Z2, which is extended in the thickness direction relative to the thickness reference piece 10, is flat. Note that the "design thickness" here refers to a thickness determined by the business owner, laws, regulations, etc., and is preferably the thickness T2 of the waterproofing layer coatings Z1 and Z2 as described in the design documents, such as the design drawings and construction guidelines, which are referenced during painting work. The thickness T2 is preferably 2 millimeters. However, it may be anywhere between 1.6 millimeters and 2 millimeters. By covering the thickness reference piece 10 with a coating thickness T2 equal to or greater than the thickness T2 of the waterproofing layer coatings Z1 and Z2, the thickness T2 of the coating can be ensured to be sufficient.

[0032] The peripheral region refers to the region on the surface of the coating film that surrounds the region where the coating film reference piece 10 is projected in the film thickness direction of the urethane coatings Z1 and Z2 (upward in this embodiment) (the region with steps and slopes in Figure 6), and in this embodiment, a region approximately 2 to 3 millimeters wide is preferred. Furthermore, the term "flat" refers to a state in which the steps and slopes shown in Figure 6 do not appear on the surface of the coating film, and may refer to a state in which the surface is flush with the surface of the region further outside the peripheral region (the state in Figure 7).

[0033] It is also preferable to apply a coating film formation method for forming a coating film on the rooftop R, which is the area to be coated, using the coating film reference piece 10 in this way, which includes a first coating step in which the coating film reference piece 10 is placed on the rooftop R, which is the area to be coated, and the coating film reference piece 10, and then the coating film is applied to the area to be coated and the coating film reference piece 10, and a second coating step in which, after the first coating step, paint is applied until the peripheral area of ​​the surface of the coating film, which is on an extension of the coating film in the thickness direction relative to the coating film reference piece 10, is flat. This method can be applied not only to the coating film thickness reference piece 10 of the first embodiment, but also to the coating film thickness reference piece 12 of the second embodiment and the coating film thickness reference piece 13 of the third embodiment.

[0034] Furthermore, the waterproofing layer made of a coating film may be applied to sloped sections. When the application target is a sloped section, the coating film is prone to poor application. However, by using the thickness reference piece 10 of the first embodiment, it is possible to visually confirm that the coating film has a sufficient thickness T2 without damaging the coating film. Therefore, the thickness T of the coating film reference piece 10 of the first embodiment can be used as a reference for the coating film thickness T2. In this way, application defects can be significantly reduced. The above effect is not limited to the coating film thickness reference piece 10 of the first embodiment, but also applies to the coating film thickness reference piece 12 of the second embodiment and the coating film thickness reference piece 13 of the third embodiment.

[0035] Furthermore, if the target area for painting is the rooftop R of a building, it is open and uncovered, so even if the paint film is thick enough to cover the thickness reference piece 10, it is preferable because it does not limit the use of the space on the rooftop R. Furthermore, if the rooftop R of a building is level, the thickness reference piece placed on the rising material will not be affected by gravity, even when the rising material is not solidified, and will not shift or become uneven. However, by using a rising material and a paint film with high viscosity, the thickness reference piece 10 of the first embodiment can be used on a vertical wall (not shown). In this way, the thickness reference piece 10 of the first embodiment can be applied not only to the rooftop R of a building but also to floors or walls as the target area for painting. It should be noted that not only the thickness reference piece 10 of the first embodiment but also the thickness reference piece 12 of the second embodiment and the thickness reference piece 13 of the third embodiment can be applied to floors or walls as well. [Explanation of symbols]

[0036] 10 Film Thickness Reference Piece of the First Example 12 Film Thickness Standard Piece of the Second Example 13 Film Thickness Standard Piece of the Third Example T Thickness of film thickness standard T2 Thickness of waterproof coating R Rooftop Z Urethane waterproof rising material Z1, Z2 painting

Claims

1. A film thickness reference piece used when forming a coating film on a coating target part, The film thickness reference piece has a thickness equal to or less than the thickness of the coating film, and is placed on the part to be painted to serve as a reference for the thickness of the coating film.

2. A film thickness reference piece used when forming a coating film on a coating target part, The film thickness reference piece has a circular shape in a plan view, a thickness equal to or less than the thickness of the coating film, and is placed on the part to be painted to serve as a reference for the thickness of the coating film.

3. A film thickness reference piece used when forming a coating film on a coating target part, The film thickness reference piece has a polygonal shape when viewed from above, a thickness equal to or less than the thickness of the coating film, and is placed on the part to be painted to serve as a reference for the thickness of the coating film.

4. 4. The film thickness reference piece according to claim 1, wherein the film thickness reference piece is made of urethane resin.

5. 4. The film thickness reference piece according to claim 1, wherein the film thickness reference piece is made of urethane resin and has a thickness of 1.4 mm to 1.6 mm.

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