Method for analyzing primer coating applied to a substrate

Abstract

This invention provides a method for accurately analyzing the type of primer and uneven application of primer in areas where defects such as peeling have occurred in the substrate. [Solution] A method for analyzing a primer film applied to a substrate, comprising the steps of: attaching a first member having an adhesive surface with an adhesive force to the primer film applied to the substrate to at least a portion of the primer film applied to the substrate; cutting out the portion to which the first member is attached from the substrate to a predetermined thickness along the direction of the adhesive surface of the first member to obtain a substrate piece having an attachment surface to which the first member is attached and a cut surface opposite to the attachment surface; applying a second member having a second adhesive force with an adhesive force to the substrate greater than the first adhesive force to the substrate to the cut surface; peeling the first member from the substrate piece to obtain a test specimen having a second member, a substrate piece on the second member and a primer film on the substrate piece; and analyzing the primer film of the test specimen.

Description

[Technical Field]

[0001] The present invention relates to a method for analyzing a primer film applied to the surface of a substrate such as building exterior materials. [Background technology]

[0002] Traditionally, in waterproofing work and sealing work to maintain airtightness, it has been common practice to apply a primer to the substrate prior to the application of the waterproofing or sealing material, primarily to improve adhesion between the waterproofing or sealing material and the substrate, thereby maintaining waterproofing and airtightness. In particular, in the fields of architecture and civil engineering, sealing materials are mainly applied for waterproofing purposes, and when applying sealing materials, a primer is applied to the substrate to be adhered in order to further strengthen adhesion to various joint substrates, such as wet materials like mortar and concrete, or dry materials like ceramic or metal siding and ALC panels.

[0003] The areas of the substrate to which primer application is performed include not only flat areas but also areas with various surface shapes such as curved, convex, concave, grooved, and stepped surfaces. Furthermore, substrates with surface shapes such as flat, curved, convex, concave, grooved, and stepped surfaces may be positioned vertically (in the direction of gravity).

[0004] Liquid primers, which are made by dissolving or dispersing resins, various additives, etc., in organic solvents or water, are applied to these substrate areas using brushes, rollers, sprays, etc. When the surface shape of the substrate to be primed is flat and horizontal, the process of uniformly applying the primer is relatively easy. On the other hand, when the surface shape of the substrate is curved, convex, concave, grooved, stepped, etc., areas where the primer has not been applied (so-called missed spots) or areas where the amount of primer applied (so-called uneven coating) may occur. Thus, there are areas on the surface of the substrate where it is difficult to apply the primer uniformly. In addition, when applying primer to the substrate with a brush, if the brush is moved quickly to improve work efficiency, areas where the primer has not been applied or areas where the amount of primer applied is insufficient may occur on the substrate.

[0005] Thus, when applying primer to ensure adhesion between waterproofing materials and sealants and the substrate (adherent), uneven application, missed spots, or omissions can make it difficult to achieve sufficient adhesion. Furthermore, waterproofing materials and sealants typically use dedicated primers, and failing to use these specialized primers can make it difficult to achieve sufficient adhesion.

[0006] Thus, if a primer is applied without sufficient adhesion, and a waterproofing agent or sealant is applied to the substrate, poor adhesion to the substrate may occur after the waterproofing agent or sealant has cured, potentially leading to problems such as the waterproofing agent or sealant peeling off the substrate.

[0007] Therefore, as a method for inspecting the application state of a primer without damaging the appearance of buildings, etc., it has been proposed to form an insulating primer layer on a conductive substrate using an insulating primer, and then measure the current value or resistance value while moving a probe of a measuring instrument across the surface of the insulating primer layer, and to determine the application state of the primer based on the change in the measured current value or resistance value (Patent Document 1).

[0008] Patent Document 1 states that in areas where the insulating primer is properly applied, the current value measured by the measuring instrument will be low (high resistance value) due to the resistance of the insulating primer layer, and in areas where the insulating primer layer is missing, the current value measured by the measuring instrument will be high (low resistance value) because there is no resistance in the insulating primer layer. Therefore, there is no need to use colorants or the like in the primer, and the application state of the primer can be determined without damaging the appearance of buildings, etc., and uneven application of the primer, missed areas, and resulting poor adhesion of the sealant can be prevented.

[0009] However, Patent Document 1 has the problem that it requires the use of an insulating primer on a conductive substrate, which limits the material of the substrate and makes it incompatible with general use. Furthermore, since waterproofing materials and sealing materials each have their own designated primers, there are many primers that are not compatible with the coating condition inspection method.

[0010] On the other hand, when repairing the above defects, it is necessary to investigate the cause from the perspective of preventing recurrence. Methods for investigating the cause of the above defects include identifying the presence or absence of a primer film and the type of primer on the adhesion surface between the waterproofing material or sealant that has peeled off from the substrate. Identifying the presence or absence of a primer film and the type of primer can be done by taking a sample of the defective part of the substrate and performing instrumental analysis such as FT-IR (Fourier Transform Infrared Spectrophotometer). However, it is difficult to cut out only the adhesion surface of the substrate, such as mortar, concrete, ceramic siding, and ALC panels, that is attached to the waterproofing material or sealant. Therefore, in the analysis of the primer film on the defective part of the substrate, the adhesion surface along with the surface of the substrate is scraped off, a powdery sample is taken, and instrumental analysis is performed.

[0011] However, in analytical methods that scrape off the surface of the substrate along with the adhesion material to collect a powdered sample, there was a problem in that noise generated by the contamination of the substrate itself made it difficult to identify the type of primer. In addition, in analytical methods that scrape off the surface of the substrate along with the adhesion material to collect a powdered sample, the primer film is pulverized, making it impossible to identify the application area of ​​the primer (the distribution of the primer film on the surface of the substrate), thus making it impossible to distinguish between uneven application and missed areas. [Prior art documents] [Patent Documents]

[0012] [Patent Document 1] Japanese Patent Publication No. 2014-234613 [Overview of the project] [Problems that the invention aims to solve]

[0013] In view of the above circumstances, an object of the present invention is to accurately identify the type of primer by collecting and analyzing it without destroying the primer film applied to the surface of the adherend, which is the base material, at the defective part where the base material is peeled from the waterproof material or the sealing material, and also to accurately analyze the application state of the primer, such as uneven coating, missed coating, and uncoated parts of the primer.

Means for Solving the Problems

[0014] The gist of the configuration of the method for analyzing the primer film applied on the base material of the present invention is as follows. [1] A step of attaching a first member having an adhesion surface where the adhesion force to the primer film applied on the base material measured based on JIS A 5536:2015 is a first adhesion force to at least a partial region of the primer film applied on the base material; A step of cutting out the adhered part of the first member from the base material at a predetermined thickness along the adhesion surface direction of the first member to obtain a base material piece having an adhered surface where the first member is adhered and a cut surface facing the adhered surface; A step of applying a second member having a second adhesion force greater than the first adhesion force to the base material on the cut surface of the base material piece where the first member is adhered, the second adhesion force being the adhesion force to the base material measured based on JIS A 5536:2015; A step of peeling the first member from the base material piece to obtain a test body having the second member, the base material piece on the second member, and the primer film on the base material piece; A step of analyzing the primer film of the test body; A method for analyzing a primer film applied on a base material, comprising the above steps. [2] The method for analyzing the primer film applied on the base material according to [1], wherein the first member is a tape-like member or a sheet-like member. [3] The first adhesion force is 0.005 N / mm 2 or more and 0.014 N / mm 2A method for analyzing a primer film applied on a substrate described in [1] or [2] below. [4] The method for analyzing a primer film applied on a substrate described in [1] or [2], wherein the first member has a support and an adhesive surface provided with an adhesive layer on the support, the material of the support is at least one selected from the group consisting of cloth, paper, cellulose, polyester, and polyolefin, and the adhesive member constituting the adhesive layer is at least one selected from the group consisting of acrylic, rubber, and silicone. [5] The method for analyzing a primer film applied on a substrate described in [1] or [2], wherein the second member is a cured product of an adhesive, a cured product of a sealing material, a tape-shaped member, or a sheet-shaped member. [6] The second adhesive force is 0.015 N / mm 2 The method for analyzing a primer film applied on a substrate described in [1] or [2] above. [7] The second adhesive force is 5.00 N / mm 2 The method for analyzing a primer film applied on a substrate described in [1] or [2] below. [8] The method for analyzing a primer film applied on a substrate described in [5], wherein the adhesive is at least one selected from the group consisting of epoxy resin-based, cyanoacrylate-based, modified silicone-based, polyurethane resin-based, acrylic resin-based, and vinyl acetate resin-based. [9] The method for analyzing a primer film applied on a substrate described in [5], wherein the sealing material is at least one selected from the group consisting of urethane-based, modified silicone-based, polysulfide-based, and silicone-based.

[10] The method for analyzing a primer film applied on a substrate described in [5], wherein the second member is the tape-shaped member or the sheet-shaped member having a support and an adhesive surface provided with an adhesive layer on the support.

[11] A method for analyzing a primer film applied on a substrate according to

[10] , wherein the material of the support is at least one selected from the group consisting of cloth, paper, cellulose, polyester and polyolefin, and the adhesive member constituting the adhesive layer is at least one selected from the group consisting of acrylic, rubber and silicone.

[12] The second adhesive force is 0.003 N / mm² greater than the first adhesive force. 2 A method for analyzing a primer film applied to a substrate described in the above-mentioned [1] or [2].

[13] A method for analyzing a primer film applied to a substrate according to [1] or [2], wherein the predetermined thickness is 0.5 mm or more and 1.0 mm or less.

[14] A method for analyzing a primer film applied on a substrate according to [1] or [2], wherein the portion to be attached is cut off from the substrate using a cutting tool.

[15] A method for analyzing a primer film applied to a substrate according to [1] or [2], wherein the substrate is at least one building exterior substrate selected from the group consisting of concrete, mortar, ALC panel, siding, slate, and gypsum.

[16] A method for analyzing a primer film applied to a substrate according to [1] or [2], wherein the first member is a masking tape. [Effects of the Invention]

[0015] According to the method for analyzing a primer film applied to a substrate of the present invention, the steps are: to cut out the portion of the substrate to which the first member is attached, along the direction of the adhesive surface of the first member, to obtain a substrate piece having an attachment surface to which the first member is attached and a cut surface opposite to the attachment surface; and to analyze the substrate piece to which the first member is attached, on the cut surface, JIS A The present invention provides a method for analyzing a primer film applied to a substrate, comprising the steps of: applying a second member having a second adhesive force greater than the first adhesive force, as measured according to 5536:2015; and peeling the first member from the substrate piece to obtain a test specimen having the second member, the substrate piece on the second member, and the primer film on the substrate piece. This method allows for the collection of the primer film applied to the surface of the substrate, which is the adherend, in the defective area where the waterproofing or sealing material has peeled off, without damaging it. This enables accurate identification of the type of primer and accurate analysis of areas with uneven, missed, or forgotten primer application. In this method for analyzing a primer film applied to a substrate, the primer film is difficult to peel off from the substrate piece because the adhesive force of the primer to the substrate is greater than the first adhesive force.

[0016] According to the method for analyzing a primer film applied to a substrate of the present invention, if the first member is a tape-shaped member or a sheet-shaped member, the steps of attaching the first member and peeling the first member off the substrate piece can be streamlined.

[0017] According to the analytical method for a primer film applied to a substrate of the present invention, the first adhesive strength is 0.005 N / mm². 2 More than 0.014N / mm 2By the following, when performing the process of peeling the first member from the base material piece, while preventing the adhesive member of the first member from remaining on the primer film or the base material piece, further surely preventing the peeling of the primer film from the base material piece, the first member can be easily peeled from the base material piece, and further surely preventing the destruction of the primer film applied to the surface of the base material.

[0018] Also, according to the analysis method of the primer film applied on the base material of the present invention, the first adhesive force is 0.005 N / mm 2 or more and 0.014 N / mm 2 or less, so that in the process of obtaining the base material piece, when cutting out the adhered portion of the base material to which the first member is attached from the base material, excellent holding performance can be exhibited with respect to the base material piece.

[0019] According to the analysis method of the primer film applied on the base material of the present invention, since the second member is a cured product of an adhesive, a cured product of a sealing material, a tape-like member or a sheet-like member, the primer film applied to the surface of the adherend which is the base material at the defective portion of the base material can be more easily collected without being destroyed.

[0020] According to the analysis method of the primer film applied on the base material of the present invention, the second adhesive force is greater than the first adhesive force and 0.015 N / mm 2 or more, so that the peeling process of the first member from the base material piece can be further smoothed.

[0021] According to the analysis method of the primer film applied on the base material of the present invention, the second adhesive force is 0.003 N / mm 2 or more greater than the first adhesive force, so that the peeling process of the first member from the base material piece can be further facilitated.

[0022] According to the method for analyzing a primer film applied to a substrate of the present invention, in the step of obtaining a substrate piece, by setting the predetermined thickness to 0.5 mm or more and 1.0 mm or less, the primer film applied to the surface of the substrate (adherent) can be collected more reliably without being damaged, and when the attached portion to which the first member is attached is cut from the substrate, the first member has more reliable retention performance on the substrate piece and can maintain the appearance after repair. [Brief explanation of the drawing]

[0023] [Figure 1] This image shows the results of EDX analysis of the surface of a building exterior substrate having a primer coating in the example. [Figure 2] This spectrum shows the FT-IR measurement results of the ceramic siding surface in the example. [Modes for carrying out the invention]

[0024] The following describes in detail the method for analyzing the primer film applied to the substrate of the present invention.

[0025] The present invention provides a method for analyzing a primer film applied to a substrate, comprising: (1) attaching a first member having an adhesive surface to at least a portion of the primer film applied to the substrate, the adhesive force to the primer film applied to the substrate, as measured according to JIS A 5536:2015, is a first adhesive force (hereinafter sometimes referred to as the "first member attachment step"); (2) cutting out the portion of the substrate to which the first member is attached, along the direction of the adhesive surface of the first member, to obtain a substrate piece having an attachment surface to which the first member is attached and a cut surface opposite to the attachment surface (hereinafter sometimes referred to as the "substrate cutting step"); and (3) applying JIS A to the cut surface of the substrate piece to which the first member is attached. The method comprises: (4) a step of applying a second member having a second adhesive force greater than the first adhesive force, as measured in accordance with 5536:2015 (hereinafter sometimes referred to as the "second member application step"), (5) a step of peeling the first member from the base material piece to obtain a test specimen having the second member, the base material piece on the second member, and the primer film on the base material piece (hereinafter sometimes referred to as the "first member peeling step"), and (6) a step of analyzing the primer film on the test specimen (hereinafter sometimes referred to as the "primer film analysis step").

[0026] The present invention provides a method for analyzing a primer film applied to a substrate, comprising: a substrate cutting step, in which the portion of the substrate to which the first member is attached is cut from the substrate to a predetermined thickness along the direction of the adhesive surface of the first member, thereby obtaining a substrate piece having an attachment surface to which the first member is attached and a cut surface opposite to the attachment surface; a second member application step, in which a second member having a second adhesive strength greater than the first adhesive strength, as measured according to JIS A 5536:2015, is applied to the cut surface of the substrate piece to which the first member is attached; and a first member peeling step, in which the first member is peeled off from the substrate piece, thereby obtaining a test specimen having the second member, the substrate piece on the second member, and the primer film on the substrate piece. This method allows for the collection of a primer film applied to the surface of the substrate, which is the adherend, in the defective portion of the substrate where the waterproofing material or sealing material has peeled off, without damaging it. Furthermore, the primer film is exposed on the surface of the test specimen. Therefore, the analytical method for a primer film applied to a substrate according to the present invention can accurately identify the type of primer and accurately analyze the application state of the primer, such as uneven application, missed areas, and areas where the primer was not applied.

[0027] (1) First component bonding process In the first component attachment step, the first component is attached to at least a portion of the primer film applied to the substrate, for example, to a defective area of ​​the substrate such as a base material where the waterproofing material or sealing material has peeled off. The first component has an adhesive surface having a first adhesive strength. The first adhesive strength refers to the adhesive strength to the primer film applied to the substrate, as measured in accordance with JIS A 5536:2015.

[0028] The shape of the first member is not particularly limited as long as it has an adhesive surface having a predetermined adhesive strength, but a tape-like member or a sheet-like member is preferred because it can facilitate the peeling of the first member from the base material in the first member attachment step and the first member peeling step, respectively, and a tape-like member is particularly preferred because it can facilitate pinpoint attachment of the first member to the defective area of ​​the base material. Therefore, the first member is preferably an adhesive tape or an adhesive sheet, and an adhesive tape is particularly preferred.

[0029] Furthermore, the first member may include, for example, a support and an adhesive surface provided on the support having an adhesive layer with a first adhesive strength. When the first member is a tape-shaped member or a sheet-shaped member, the shape of the support is tape-shaped or sheet-shaped. The adhesive surface having the first adhesive strength is provided on one surface of a support having one surface and the other surface facing the first surface, but not on the other surface. Furthermore, the first member may include, for example, a clay-like member that is irregularly shaped and has a predetermined adhesive strength as a whole.

[0030] When the first member is a tape-shaped member or a sheet-shaped member, the thickness of the tape-shaped member or sheet-shaped member is not particularly limited, but is preferably 0.05 mm to 0.40 mm, and particularly preferably 0.08 mm to 0.30 mm, in order to have mechanical strength while facilitating conformity to the surface shape of the base material, even when the surface shape of the base material is curved, convex, concave, grooved, stepped, etc.

[0031] When the first member is a tape-shaped member or a sheet-shaped member, the tensile strength of the tape-shaped member or sheet-shaped member is not particularly limited, but it is preferable that it is 15 N / 10 mm to 100 N / 10 mm, and particularly preferable that it is 20 N / 10 mm to 70 N / 10 mm, in order to have mechanical strength while facilitating conformity to the surface shape of the base material, even when the surface shape of the base material is curved, convex, concave, grooved, stepped, etc.

[0032] When the first member is a tape-like member or a sheet-like member, the elongation of the tape-like member or sheet-like member is not particularly limited, but is preferably 2.0% to 20%, and particularly preferably 2.5% to 15%, in order to have mechanical strength while facilitating conformity to the surface shape of the base material, even when the surface shape of the base material is curved, convex, concave, grooved, stepped, etc.

[0033] Examples of materials for the support include at least one selected from the group consisting of cloth, paper, cellulose, polyester, and polyolefin. Examples of adhesives for the adhesive layer include at least one selected from the group consisting of acrylic, rubber, and silicone.

[0034] Examples of adhesive tapes used as the first component include masking tape, cellophane tape, kraft adhesive tape, cloth adhesive tape, OPP (Oriented Polypropylene) adhesive tape, vinyl tape, polyester tape, polyethylene tape, polypropylene tape, nonwoven fabric tape, aluminum tape, and the like.

[0035] The first adhesive strength is not particularly limited as long as it is less than the second adhesive strength of the second member described later. However, the lower limit of the first adhesive strength is set at 0.005 N / mm² in order to reliably prevent the adhesive member of the first member from remaining on the primer film or base material during the process of peeling the first member from the base material piece in the first member peeling process, and to exhibit excellent retention performance against the base material piece when cutting the portion of the base material to which the first member is attached from the base material in the base material cutting process. 2 Preferably, 0.006 N / mm 2 More preferably, 0.008 N / mm 2This is particularly preferable. Furthermore, the upper limit of the first adhesive strength is set to 0.014 N / mm² in the first member peeling step, which allows the first member to be easily peeled off the base material piece while more reliably preventing the peeling of the primer film from the base material piece, and more reliably preventing the destruction of the primer film applied to the base material surface. 2 Preferably, 0.013 N / mm 2 More preferably, 0.012 N / mm 2 This is particularly preferable. The first adhesive strength is the adhesive strength to the primer film applied to the substrate, measured according to JIS A 5536:2015, and more specifically, it is the tensile adhesive strength to the primer film applied to the substrate.

[0036] (2) Substrate cutting process In the base material cutting process, the portion of the base material to which the first member is attached is cut from the base material to a predetermined thickness along the direction of the adhesive surface of the first member. The portion of the base material to which the first member is attached is a defective area of ​​the base material, such as a substrate, where the waterproofing material or sealing material has peeled off. In the base material cutting process, a base material piece is obtained having an attachment surface (first surface) to which the first member is attached, and a cut surface (second surface) opposite to the attachment surface (first surface). That is, in the base material cutting process, a base material piece to which the first member is attached is obtained by cutting out the portion of the base material to which the first member is attached as a base material piece which is a part of the base material. The cut surface of the base material piece is the surface formed by cutting out the portion of the base material to which the first member is attached from the base material.

[0037] The shape of the base material piece is not particularly limited and examples include cubes, cuboids, or other hexahedrons, as well as cylindrical shapes.

[0038] The predetermined thickness of the portion to be attached when cutting out the portion of the base material to be attached is not particularly limited, but its lower limit is preferably 0.5 mm, and particularly preferably 0.6 mm, from the standpoint of being able to more reliably remove the portion without damaging the primer film applied to the surface of the substrate, which is the adherend. Furthermore, the upper limit of the predetermined thickness is preferably 1.0 mm, and particularly preferably 0.9 mm, from the standpoint of more reliably imparting retention performance to the first member to the base material piece when cutting out the portion to which the first member is attached from the base material, and maintaining the appearance after repair.

[0039] In the substrate cutting process, for example, the area to be attached can be cut from the substrate as a substrate piece by using a cutting tool to cut the area to be attached from the substrate. Alternatively, in the substrate cutting process, for example, the area to be attached can be scraped off from the substrate as a substrate piece by using a cutting tool to scrape the area to be attached from the substrate. Examples of cutting tools include blades such as utility knives.

[0040] (3) Second component application process In the second component application step, a second component having a second adhesive strength is applied to the cut surface of a base material piece, which is a part of the base material to which the first component is attached. By applying the second component having a second adhesive strength to the cut surface of the base material piece, the second component is bonded to the cut surface of the base material piece. The second adhesive strength is greater than the first adhesive strength. The second adhesive strength, like the first adhesive strength, is the adhesive strength to the base material measured according to JIS A 5536:2015, and more specifically, it is the tensile adhesive strength to the base material. In the second component application step, a base material piece is obtained in which the first component is attached to the attachment surface (first surface) and the second component is applied to the cut surface (second surface) opposite to the attachment surface (first surface). In other words, in the second member application step, a base material piece is obtained in which the first member is bonded to the bonding surface (first surface) and the second member is bonded to the cutting surface (second surface).

[0041] The second member is not particularly limited in form, as long as it has an adhesive surface having a second adhesive force of a predetermined adhesive strength. Preferred forms of the second member include, for example, a cured adhesive, a cured sealant, a tape-like member having an adhesive surface having a second adhesive strength, or a sheet-like member having an adhesive surface having a second adhesive strength, as these allow for easier and less damaging removal of the primer film applied to the surface of the substrate (the adherend) at the defective portion of the substrate.

[0042] When the second component is a cured adhesive, the adhesive is not particularly limited and includes, for example, epoxy resin-based, cyanoacrylate-based, modified silicone-based, polyurethane resin-based, acrylic resin-based, vinyl acetate resin-based, etc. Also, when the second component is a cured sealant, the sealant is not particularly limited and includes, for example, one-component sealants and two-component sealants. Furthermore, the composition of the sealant is not particularly limited and includes, for example, urethane-based, modified silicone-based, polysulfide-based, silicone-based, etc.

[0043] If the second component is a cured adhesive or a cured sealant, the second component can be applied to the cut surface (second surface) of the base material piece by applying the adhesive or sealant (adhesive or sealant before curing) to the cut surface (second surface), and then curing the applied adhesive or sealant.

[0044] Since the cut surface (second surface) of the base material piece may not be a smooth surface but a rough surface with irregular irregularities, it is preferable that the adhesive or sealant before curing has properties that allow it to follow the irregular irregularities while having viscosity and thixotropy that allow it to maintain a predetermined thickness as a second component. Specifically, for example, as an adhesive or sealant having the above-mentioned preferred properties, the viscosity of the adhesive or sealant before curing at 23°C is preferably 0.1 Pa·s or more and 700 Pa·s or less, and particularly preferably 0.5 Pa·s or more and 500 Pa·s or less.

[0045] Furthermore, the second member may include, for example, a support and an adhesive surface provided on the support having an adhesive layer with a second adhesive strength. When the second member is a tape-shaped member or a sheet-shaped member, the shape of the support is tape-shaped or sheet-shaped. The adhesive surface having the second adhesive strength may be provided on one surface of a support having one surface and the other surface facing the first surface, but not on the other surface.

[0046] When the second member is a tape-shaped member or a sheet-shaped member, the thickness of the tape-shaped member or sheet-shaped member is not particularly limited and may be the same as, for example, the thickness of the tape-shaped member or sheet-shaped member as the first member, or it may be different. When the second member is a tape-shaped member or a sheet-shaped member, the thickness of the tape-shaped member or sheet-shaped member is preferably 0.05 mm to 0.40 mm, and particularly preferably 0.08 mm to 0.30 mm, in order to have mechanical strength while being able to follow the irregular irregularities of the cut surface (second surface) of the base material piece.

[0047] When the second member is a tape-shaped member or a sheet-shaped member, the tensile strength of the tape-shaped member or sheet-shaped member is not particularly limited and may be the same as, for example, the tensile strength of the tape-shaped member or sheet-shaped member as the first member, or it may be different. When the second member is a tape-shaped member or a sheet-shaped member, the tensile strength of the tape-shaped member or sheet-shaped member is preferably 15 N / 10 mm to 100 N / 10 mm, and particularly preferably 20 N / 10 mm to 70 N / 10 mm, in order to have mechanical strength while being able to follow the irregular irregularities of the cut surface (second surface) of the base material piece and hold the base material in the first member peeling process described later. Note that the tensile strength is the tensile strength measured in accordance with JIS Z 0237:2009.

[0048] When the second member is a tape-like member or a sheet-like member, the elongation of the tape-like member or sheet-like member is not particularly limited and may be the same as, for example, the elongation of the tape-like member or sheet-like member as the first member, or it may be different. When the second member is a tape-like member or a sheet-like member, the elongation of the tape-like member or sheet-like member is preferably 2.0% to 20%, and particularly preferably 2.5% to 15%, in order to have mechanical strength while being able to follow the irregular irregularities of the cut surface (second surface) of the base material piece. Note that the elongation is measured in accordance with JIS Z 0237:2009.

[0049] Examples of materials for the support include at least one selected from the group consisting of cloth, paper, cellulose, polyester, and polyolefin. Examples of adhesive members constituting the adhesive layer include at least one selected from the group consisting of acrylic, rubber, and silicone.

[0050] Examples of the tape-like member used as the second component include adhesive tape. Examples of adhesive tapes include masking tape, cellophane tape, kraft adhesive tape, cloth adhesive tape, OPP (Oriented Polypropylene) adhesive tape, vinyl tape, polyester tape, polyethylene tape, polypropylene tape, nonwoven fabric tape, aluminum tape, and the like.

[0051] The second adhesive strength is not particularly limited as long as it is greater than the first adhesive strength of the first member, but the lower limit of the second adhesive strength is 0.015 N / mm², in order to further facilitate the peeling process of the first member from the base material in the first member peeling process. 2 Preferably, 0.016 N / mm 2 More preferably, 0.200 N / mm 2 This is particularly preferable. Furthermore, the upper limit of the second adhesive strength is 5.00 N / mm². 2 Preferably, 4.0 N / mm 2 That is particularly preferable.

[0052] Furthermore, the difference between the second adhesive force and the first adhesive force is not particularly limited, as long as the second adhesive force is greater than the first adhesive force of the first member. However, the lower limit of the difference between the second and first adhesive forces is 0.003 N / mm² greater than the first adhesive force, in order to further facilitate the peeling process of the first member from the base material. 2 A larger value is preferable, 0.005 N / mm 2 Larger is preferable, 0.05 N / mm 2 A larger value is more preferable, 0.10 N / mm 2 A larger value is particularly preferable. Furthermore, the upper limit of the difference between the second adhesive strength and the first adhesive strength is 5.00 N / mm² when the second adhesive strength is greater than the first adhesive strength. 2 A larger value is preferable. The second adhesive strength is the adhesive strength to the substrate measured according to JIS A 5536:2015, as described above, and more specifically, it is the tensile adhesive strength to the substrate.

[0053] (4) First component peeling process In the first member peeling step, the first member is peeled off from the adhesive surface (first surface) of the base material piece to obtain a test specimen having a second member, a base material piece on the second member, and a primer film on the base material piece. As a result of the first member peeling step, the primer film on the base material piece is exposed on the surface of the test specimen, and can be collected without damaging the primer film applied to the surface of the defective portion of the base material. From the above, in the analytical method for primer film applied to a base material of the present invention, the adhesive force of the primer to the base material is greater than the first adhesive force, so the primer film is difficult to peel off from the base material piece.

[0054] Since the first adhesive strength of the first component is less than the second adhesive strength of the second component, even if the first component is peeled off the adhesive surface (first surface) of the base material piece, the state in which the second component is adhered to the cut surface of the base material piece is maintained.

[0055] One method for removing the first member from the adhesive surface (first surface) of the base material is for a worker to hold the second member in place while grasping the end of the first member that is adhered to the adhesive surface (first surface) of the base material, and then peeling the first member away from the adhesive surface (first surface) of the base material.

[0056] (5) Primer coating analysis process In the primer film analysis step, the primer film exposed on the surface of the test specimen, that is, the primer film applied to the surface of the defective area of ​​the substrate, is analyzed. The primer film analysis step identifies the type of primer in the defective area of ​​the substrate and analyzes the distribution of the primer in the defective area of ​​the substrate, including areas of uneven application, missed areas, and areas where the primer was not applied.

[0057] Methods for analyzing the type of primer coating and the distribution of primers include, for example, FT-IR (Fourier transform infrared spectroscopy) and EDX (energy-dispersive X-ray spectroscopy).

[0058] Examples of base materials include building exterior materials. Examples of building exterior materials include concrete, mortar, ALC panels, siding boards, slate, and gypsum. [Examples]

[0059] Next, embodiments of the present invention will be described, but the present invention is not limited to these examples unless it exceeds the spirit of the invention.

[0060] Apply primer (140g / m²) to the end grain (cut surface) of 50mm x 30mm x 14mm ceramic siding (KMEW Corporation, Excelage Hydrophilic 14). 2A coated and uncoated section was created. An elastic recovery test specimen was prepared as specified in JIS A 1439:2016 (Test Methods for Building Sealant) 5.2.2, with this end surface being the adhesion surface for the sealant (Auton Siding Sealant, manufactured by Auto Chemical Industry Co., Ltd.), and cured for 28 days under conditions of 23°C and 50% RH. After curing, the sealant was peeled off the end surface of the ceramic siding, and a masking tape (first component, SB-246, manufactured by Kamoi Kakoshi Co., Ltd.) having an adhesive surface where the adhesion strength to the primer applied to the end surface of the ceramic siding, as measured according to JIS A 5536:2015, was the first adhesive strength was applied to the entire end surface of the ceramic siding. The primer applied to the ceramic siding was a primer to which chlorinated rubber was added as a labeling compound.

[0061] As shown in Table 1 below, the adhesive strength of the masking tape to the primer (first adhesive strength) was approximately equivalent to the adhesive strength to ceramic siding measured according to JIS A 5536:2015.

[0062] Next, the portion of the ceramic siding to which the masking tape was attached was cut from the ceramic siding to a thickness of 0.5 mm along the direction of the adhesive surface of the masking tape, thereby obtaining a hexahedral ceramic siding piece (base material piece) having an adhesive surface to which the masking tape was attached and a cut surface opposite to the adhesive surface.

[0063] Next, a vinyl acetate resin emulsion adhesive (Konishi Co., Ltd., Bond Woodworking Adhesive) was applied to the cut surface of a ceramic siding piece to which masking tape had been attached. The applied vinyl acetate resin emulsion adhesive was then cured, resulting in a cured vinyl acetate resin emulsion adhesive (second member) having a second adhesive strength greater than the adhesive strength of the masking tape, as measured according to JIS A 5536:2015. Next, the masking tape was peeled off the ceramic siding piece to obtain a test specimen consisting of the cured vinyl acetate resin emulsion adhesive, the ceramic siding piece on the cured vinyl acetate resin emulsion adhesive, and the primer film on the ceramic siding piece, with the primer film exposed. Finally, the surface of the test specimen was measured using EDX and FT-IR.

[0064] The measurement conditions for EDX are as follows: Analytical instrument: Bruker M4 TORNADO Vacuum level: 3 mbar, Voltage: 50 kV, Current: 200 μA

[0065] The adhesive strength of the masking tape to the primer (first adhesive strength) and to the ceramic siding, as well as the adhesive strength of the cured vinyl acetate resin emulsion adhesive to the ceramic siding (second adhesive strength), are shown in Table 1 below.

[0066] [Table 1]

[0067] Figure 1 shows the EDX measurement results of the ceramic siding surface in the example.

[0068] Figure 1 shows the distribution of each element on the surface of the test specimen: silicon (top left photo), sulfur (top center photo), chlorine (top right photo), calcium (bottom left photo), titanium (bottom center photo), and iron (bottom right photo). Note that silicon (top left photo), sulfur (top center photo), calcium (bottom left photo), titanium (bottom center photo), and iron (bottom right photo) are all elements derived from building exterior substrates or their accessories, while chlorine (top right photo) is an element derived from the primer film, not from ceramic siding or its accessories.

[0069] In the example, as shown in the upper right photograph of Figure 1, EDX measurement revealed that the primer film containing chlorinated rubber was applied only to the lower left portion of the ceramic siding surface. Therefore, it was confirmed that defects in the building's exterior substrate were caused by the worker failing to apply the primer properly or forgetting to apply it properly, resulting in the peeling of the waterproofing material or sealant from the building's exterior substrate.

[0070] Furthermore, as shown in the upper right photograph of Figure 1, it was confirmed that in the embodiment, a primer containing chlorinated rubber, which is the specified primer type, was used.

[0071] Figure 2 shows the FT-IR measurement results of the ceramic siding surface in the example.

[0072] As shown in Figure 2, FT-IR measurements confirmed absorption due to the cured primer in the primer-coated area. Furthermore, in Figure 2, the type of primer used could be identified based on the spectral shape. [Industrial applicability]

[0073] This invention allows for the identification of primer types and analysis of areas with uneven, missed, or forgotten primer application by collecting and analyzing the primer film applied to the surface of a substrate without damaging it. Therefore, it is particularly valuable in the field of investigating the causes of defects such as peeling of waterproofing and sealing materials.

Claims

1. A step of attaching a first member to at least a portion of a primer film applied to a substrate, the first member having an adhesive surface whose adhesive strength to the primer film applied to the substrate, as measured according to JIS A 5536:2015, is a first adhesive strength; The process of obtaining a base material piece having a bonding surface to which the first member is attached and a cut surface opposite the bonding surface, by cutting the portion of the base material to which the first member is attached along the direction of the bonding surface of the first member to which the first member is attached, A step of applying a second member to the cut surface of the base material piece to which the first member is attached, the second member having a second adhesive strength that is greater than the first adhesive strength, as measured according to JIS A 5536:2015, to the base material piece to which the first member is attached; A step of peeling the first member from the base material piece to obtain a test specimen having the second member, the base material piece on the second member, and the primer film on the base material piece, A step of analyzing the primer coating on the test specimen, A method for analyzing a primer film applied to a substrate, comprising the following characteristics.

2. A method for analyzing a primer film applied to a substrate according to claim 1, wherein the first member is a tape-shaped member or a sheet-shaped member.

3. The first adhesive strength is 0.005 N / mm². ２ 0.014N / mm or more ２ A method for analyzing a primer film applied to a substrate according to claim 1 or 2, wherein the method is as follows:

4. A method for analyzing a primer film applied on a substrate according to claim 1 or 2, wherein the first member comprises a support and an adhesive surface having an adhesive layer provided on the support, the material of the support is at least one selected from the group consisting of cloth, paper, cellulose, polyester and polyolefin, and the adhesive member constituting the adhesive layer is at least one selected from the group consisting of acrylic, rubber and silicone.

5. A method for analyzing a primer film applied on a substrate according to claim 1 or 2, wherein the second member is a cured adhesive, a cured sealant, a tape-like member, or a sheet-like member.

6. The second adhesive strength is 0.015 N / mm². ２ The method for analyzing a primer film applied to a substrate according to claim 1 or 2.

7. The second adhesive strength is 5.00 N / mm². ２ A method for analyzing a primer film applied to a substrate according to claim 1 or 2, wherein the method is as follows:

8. A method for analyzing a primer film applied on a substrate according to claim 5, wherein the adhesive is at least one selected from the group consisting of epoxy resin-based, cyanoacrylate-based, modified silicone-based, polyurethane resin-based, acrylic resin-based, and vinyl acetate resin-based adhesives.

9. A method for analyzing a primer film applied on a substrate according to claim 5, wherein the sealing material is at least one selected from the group consisting of urethane-based, modified silicone-based, polysulfide-based, and silicone-based materials.

10. A method for analyzing a primer film applied on a substrate according to claim 5, wherein the second member is the tape-like member or the sheet-like member having a support and an adhesive surface having an adhesive layer provided on the support.

11. A method for analyzing a primer film applied on a substrate according to claim 10, wherein the material of the support is at least one selected from the group consisting of cloth, paper, cellulose, polyester, and polyolefin, and the adhesive member constituting the adhesive layer is at least one selected from the group consisting of acrylic, rubber, and silicone.

12. The second adhesive strength is 0.003 N / mm² higher than the first adhesive strength. ２ A method for analyzing a primer film applied to a substrate according to claim 1 or 2, which is greater than or equal to the above.

13. A method for analyzing a primer film applied on a substrate according to claim 1 or 2, wherein the predetermined thickness is 0.5 mm or more and 1.0 mm or less.

14. A method for analyzing a primer film applied on a substrate according to claim 1 or 2, wherein the portion to be attached is cut off from the substrate using a cutting tool.

15. A method for analyzing a primer film applied to a substrate according to claim 1 or 2, wherein the substrate is at least one type of building exterior substrate selected from the group consisting of concrete, mortar, ALC panel, siding board, slate, and gypsum.

16. A method for analyzing a primer film applied to a substrate according to claim 1 or 2, wherein the first member is masking tape.

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