JP6661064B1 - Inspection method for primer, bonded structure, elevator, satellite, and method for manufacturing bonded structure - Google Patents

Abstract

It is an object of the present invention to provide an inspection method for an undercoating material, which can accurately inspect the coating state of the undercoating material. The method for inspecting an undercoat material is a step of applying an undercoat material in which a magnetic powder is dispersed on a base material, and a measuring step of measuring the magnetic field strength of the surface of the base material to which the undercoat material is applied, The determination step of determining the application state of the undercoat material by comparing the measured magnetic field strength with a predetermined threshold value. Since the magnetic powder is dispersed in the undercoat material, there is a correlation between the magnetic field strength of the magnetic powder to be measured and the thickness of the undercoat material. Therefore, by measuring the strength of the magnetic field, it is possible to accurately inspect the coating state of the undercoat material.

Description

  The present invention relates to an undercoat material inspection method for inspecting an undercoat material applied to a base material. The present invention also relates to a method for manufacturing an adhesive structure, an elevator, an artificial satellite, and an adhesive structure to which an undercoat material has been applied.

Before applying an adhesive or a coating material (hereinafter, referred to as an adhesive or the like) to a substrate, an undercoat material is applied to the substrate. Thereby, the adhesive strength between the base material and the adhesive or the like can be increased.
However, when the application amount of the undercoat material is insufficient, the base material and the adhesive or the like do not sufficiently adhere to each other, and thus come off.
Then, in order to inspect whether the application amount of the undercoat material is insufficient, the inspection method of the following Patent Document 1 has been proposed. In the method of inspecting an undercoat material described in Patent Literature 1 below, a current value is measured while moving a probe of an eddy current measuring device on a substrate on which the undercoat material is applied. In areas where the undercoat material is insufficiently applied, a high current value is measured, and in areas where an appropriate amount of the undercoat material is applied, a minute current value close to zero is measured. The missing part can be determined.

JP 2014-234613 A

On the other hand, even when the applied amount of the undercoat material is excessive, the base material and the undercoat material may peel off. If the undercoat material is applied excessively, there will be an excessive amount of undercoat material layer between the substrate and the adhesive. The undercoat material itself does not have the same high adhesive strength as the adhesive, so if a force is applied to the adhesive side or the base material side, the undercoat material is broken inside the layer, and the base material and the adhesive etc. It will come off. Therefore, it is necessary to inspect whether the undercoat material is excessively applied so that sufficient adhesive strength can be obtained between the base material and the adhesive or the like. However, according to the inspection method of Patent Document 1, even when the undercoat material is excessively applied, the current value is very small, close to zero, as in the case where the undercoat material is applied in an appropriate amount. Becomes For this reason, there is a problem that it is not possible to accurately determine whether the undercoat material is applied in an appropriate amount or excessively.
Further, as described above, since it is not possible to determine the excessive application of the undercoat material, even if the inspection method of Patent Document 1 is used to inspect the bonded structure, the elevator, or the satellite, the quality is controlled. There was a problem that it was not easy.

  The present invention has been made to solve the above-described problems, and has as its object to provide an undercoat material inspection method capable of accurately inspecting the application state of an undercoat material. It is another object of the present invention to provide a method for manufacturing an adhesive structure, an elevator, an artificial satellite, and an adhesive structure in which quality can be easily controlled.

  The method for inspecting an undercoat material according to the present invention includes an undercoat material application step of applying an undercoat material in which magnetic powder is dispersed to a substrate, and measuring a magnetic field strength of a surface of the substrate on which the undercoat material is applied. The method includes a measurement step and a determination step of comparing the measured strength of the magnetic field with a predetermined threshold to determine the application state of the undercoat material.

  An adhesive structure according to the present invention includes a first base material, an undercoat material disposed on the first base material and containing a dispersed magnetic substance powder, an adhesive disposed on the undercoat material, and an adhesive. And a second base member arranged on the agent and bonded to the first base member by an adhesive.

  The elevator according to the present invention includes a panel constituting a wall of an elevator car, a reinforcing member for reinforcing the panel, and a primer material which is disposed on one of the panel and the reinforcing member and contains dispersed magnetic substance powder. And an adhesive disposed on the undercoating material and bonding the panel and the reinforcing member.

  The artificial satellite according to the present invention has a housing, a substrate extending from the housing, a solar cell adhered to the substrate and generating power, and disposed on one of the substrate or the solar cell, and dispersed magnetic powder. It is provided with an undercoat material to be contained and an adhesive disposed on the undercoat material and bonding the substrate and the solar cell.

  The method for manufacturing an adhesive structure according to the present invention includes a step of applying an undercoat material in which a magnetic material powder is dispersed to a first base material, and a step of applying a surface of the first base material to which the undercoat material is applied. The measurement step of measuring the strength of the magnetic field, and comparing the strength of the measured magnetic field with a predetermined threshold, a determination step of determining the application state of the undercoat material, and the application state was determined to be good In this case, the method includes an adhesive application step of applying an adhesive on the undercoat material, and an adhesion step of adhering the second base material on the adhesive applied on the undercoat material.

In the undercoat material inspection method according to the present invention, since the magnetic powder is dispersed in the undercoat material, there is a correlation between the strength of the magnetic field of the magnetic powder to be measured and the thickness of the undercoat material. Therefore, by measuring the strength of the magnetic field, the application state of the undercoat material can be inspected with high accuracy.
In addition, the method for manufacturing an adhesive structure, an elevator, an artificial satellite, and an adhesive structure according to the present invention includes the undercoating material containing the dispersed magnetic material powder, so that the magnetic field strength of the magnetic material powder is measured. This makes it possible to accurately inspect the application state of the undercoat material. Therefore, quality management can be easily performed.

FIG. 2 is a schematic diagram illustrating a configuration of an adhesive structure according to Embodiment 1 of the present invention. It is a schematic diagram showing the state where the undercoat material was applied to the base material after performing the undercoat material application step of the inspection method according to Embodiment 1 of the present invention. 3A and 3B are a schematic diagram showing a state where a measurement step of the inspection method according to the first embodiment of the present invention is being performed, and a graph of measured magnetic field strength (magnetic flux density). FIG. 2 is a schematic diagram showing a state in which an undercoat material is applied to a base material in the adhesive structure according to Embodiment 1 of the present invention, and a graph showing regions of measured magnetic field strength (magnetic flux density). 5 is a table showing a match or mismatch between a result of determining an adhesion state by the inspection method according to the first embodiment of the present invention and an observation result. FIG. 3 is a schematic diagram illustrating a configuration of an adhesive structure according to a modification of the first embodiment of the present invention. FIG. 9 is a schematic diagram showing a state where a step of collecting a magnetic substance powder is performed in the inspection method according to the second embodiment of the present invention. FIG. 10 is a schematic diagram illustrating a configuration of a part of an elevator according to a third embodiment of the present invention. FIG. 9 is a schematic diagram illustrating a configuration of a part of an artificial satellite according to Embodiment 4 of the present invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. The same reference numerals in the drawings represent the same or corresponding parts.

Embodiment 1
The configuration of the bonding structure 10 according to Embodiment 1 of the present invention will be described with reference to FIG.
The bonding structure 10 is obtained by bonding a first base material 1 and a second base material 5 with an adhesive 4. In order to increase the adhesive strength between the first substrate 1 and the adhesive 4, a primer material 2 is disposed between the first substrate 1 and the adhesive 4. The magnetic powder 3 is dispersed in the undercoat material 2.

The first base material 1 and the second base material 5 in the bonding structure 10 are two members to be bonded, and are, for example, two building materials to be bonded and parts constituting an arbitrary device. The material of the first base material 1 and the second base material 5 may be any material. For example, metal materials such as stainless steel, steel, and aluminum, polycarbonate, polyphenylene sulfide, and ABS (Acrylonitrile-Butadiene-Styrene) It is a resin material such as resin, polypropylene, polyethylene, nylon, and acrylic.
In addition, the adhesive structure 10 includes the first base material 1 and the second base material 5 as described above, and for example, includes moving bodies such as automobiles, trains, ships, and airplanes, houses, buildings, and the like. Examples include buildings, electronic devices such as semiconductors, televisions, refrigerators, home appliances such as air conditioners, elevators, and artificial satellites.

The undercoat material 2 is a primer for increasing the adhesive strength between the first base material 1 and the adhesive 4, and is applied on the first base material 1. It is located between them. One end of the molecule contained in the primer binds to the first base material 1 and the other end binds to the adhesive 4. Thereby, the adhesive strength between the first base material 1 and the adhesive 4 is increased.
The material of the undercoat material 2 can be arbitrarily selected as long as it enhances the adhesive strength between the first base material 1 and the adhesive 4. For example, known primers such as a composition containing an epoxy resin, an acrylic resin, a urethane resin, a cyanoacrylate type, a synthetic rubber type, an amine diameter, a carboxyl type and the like can be used. In addition, a volatile solvent is used as a solvent component of the undercoat material 2. For example, toluene, acetone, cyclohexane, ethanol, methanol, propanol, 2-butanone and the like. FIG. 1 shows a state after the volatile solvent has volatilized.

The undercoat material 2 is applied in a state where the magnetic powder 3 is uniformly dispersed. The magnetic particles constituting the magnetic powder 3 are particles made of an Fe-based oxide such as Fe ₂ O ₃ , Fe ₃ O ₄ , ferrite, iron, cobalt, nickel, or an alloy thereof, and are paramagnetic. Or it is a ferromagnetic material.
As the magnetic particles constituting the magnetic powder 3, nanoparticles having an average particle diameter of 5 nm to 500 nm are used. By using the nanoparticles, the dispersibility of the magnetic powder 3 in the undercoat material 2 is improved, and the magnetic powder 3 can be uniformly dispersed. If the average particle diameter of the magnetic particles constituting the magnetic powder 3 is 500 nm or more, the dispersibility is reduced, and the magnetic powder 3 is coated before the undercoat material 2 is applied to the first base material 1. Settles in 2. Further, it is difficult to prepare a magnetic powder 3 having an average particle diameter of 5 nm.
Here, the average particle diameter of the magnetic substance powder 3 is measured with a scanning electron microscope (SEM). The particles are photographed with a scanning electron microscope, the minor axis of each of the 20 particles is measured from the microscope image, and the average value of the minor axes is used as the average particle diameter.

  The mixing ratio of the magnetic powder 3 to the undercoat material 2 is 0.01 wt% to 10 wt%. When the compounding ratio of the magnetic substance powder 3 is less than 0.01 wt%, the amount of the applied magnetic substance powder 3 is small and sufficient inspection accuracy cannot be obtained. On the other hand, when the mixing ratio of the magnetic powder 3 exceeds 10 wt%, the dispersibility of the magnetic powder 3 is reduced, and sufficient inspection accuracy cannot be obtained.

Next, the adhesive 4 is for bonding the first base material 1 and the second base material 5, and is applied on the first base material 1 via the undercoat material 2. It is arranged between the first substrate 1 and the second substrate 5. The material of the adhesive 4 may be any material, and is an acrylic, epoxy, silicone, modified silicone, urethane, polyimide, thiol, or cyanoacrylate adhesive.
As described above, the adhesive 4 adheres to the first substrate 1 via the undercoat material 2 and directly adheres to the second substrate 5.

Next, a description will be given of an inspection method for inspecting the application state of the undercoat material 2 when manufacturing the above-described adhesive structure 10 and determining whether the adhesive strength is sufficient.
(Distribution step)
First, before applying the undercoat material 2 on the first base material 1, the magnetic powder 3 is added to the undercoat material 2 and mixed and stirred to disperse the magnetic powder 3 in the undercoat material 2. Since the undercoat material 2 contains a volatile solvent and has fluidity, the magnetic material powder 3 is sufficiently stirred and uniformly dispersed.
(Undercoat material application step)
Next, the undercoat material 2 in which the magnetic powder 3 is dispersed is applied to the surface of the first base material 1. This surface is a surface bonded to the second base material 5 by the adhesive 4. FIG. 2 shows a state where the undercoat material 2 is applied to the first base material 1. Since the magnetic powder 3 is dispersed, the dispersed state is maintained even when the undercoat material 2 is applied to the first base material 1. That is, the larger the amount of the undercoat material 2 applied, the more magnetic powder 3 is present. FIG. 2 shows a state before the volatile solvent of the undercoat material 2 evaporates.
(Measurement step)
Next, after the volatile solvent of the undercoat material 2 evaporates, the magnetic field applying device 11 is moved along the surface of the first base material 1 as shown in FIG. The magnetic field applying device 11 may be any device that can apply a magnetic field to the magnetic substance powder 3, and is, for example, a permanent magnet or an electromagnet.
Then, the magnetic sensor 12 is moved along the surface of the first substrate 1 to measure the magnetic flux density, which is the strength of the magnetic field at each position on the surface of the first substrate 1. As the magnetic sensor 12, a known magnetic sensor can be used. For example, the magnetic sensor 12 is a magnetic sensor including a Hall element, a magnetoresistive element, a magnetic impedance element, and the like.
Here, as shown in FIG. 3A, even after the volatile solvent has volatilized, many magnetic powders 3 are present in the places where the amount of the undercoat material 2 applied is large. Even if the volatile solvent evaporates, the magnetic substance powder 3 only moves toward the surface of the first substrate 1 and the distribution along the surface of the first substrate 1 is almost maintained. It is. Therefore, the larger the amount of the undercoat material 2 applied, the more the magnetic powder 3 is present, the more the magnetic powder 3 is magnetized, and a high magnetic flux density is measured. Conversely, the smaller the amount of the undercoat material 2 applied, the less the magnetic powder 3 is present, the less the magnetic powder 3 to be magnetized, and the lower the magnetic flux density. In short, there is a positive correlation between the applied amount of the undercoat material 2 and the magnetic flux density.
FIG. 3B is a graph of the measurement position and the measured magnetic flux density when the undercoat material 2 of FIG. 3A is measured. The change in the applied amount of the undercoat material 2 in FIG. 3A corresponds to the change in the graph in FIG. 3B, and shows that there is a positive correlation between the applied amount of the undercoat material 2 and the magnetic flux density. Have been.

(First determination step and second determination step)
The magnetic flux density at each measurement position measured in the measurement step is compared with a predetermined first threshold, and when the magnetic flux density exceeds the first threshold, the undercoat material 2 is excessively It is determined that it has been applied.
Further, the magnetic flux density at each measurement position is compared with a predetermined second threshold value, and if the magnetic flux density is lower than the second threshold value, the undercoat material 2 is insufficiently applied at the corresponding location. Is determined.
When the magnetic flux density is between the first threshold value and the second threshold value, it is determined that the undercoat material 2 is appropriately applied.
The first threshold and the second threshold are set as follows. First, the relationship between the magnetic flux density (that is, the applied amount of the undercoat material 2) and the adhesive strength is grasped in advance. When the undercoat material 2 is applied in an appropriate amount, the adhesive strength becomes sufficient, and when the amount is excessive or insufficient, the adhesive strength becomes low. The peak becomes the peak of the magnetic flux density. On the side where the magnetic flux density is increased based on the peak, the adhesive strength is reduced due to excessive application of the undercoat material 2. Then, the value of the magnetic flux density that is equal to or less than the adhesive strength within the allowable range on the product is set as the first threshold value. On the other hand, on the side where the magnetic flux density becomes smaller based on the peak, the adhesion strength is reduced due to insufficient application of the undercoat material 2. Then, the value of the magnetic flux density that is equal to or less than the adhesive strength within the allowable range on the product is set as the second threshold value. Therefore, the first threshold value is larger than the second threshold value.

(Third determination step)
Next, the area of the range determined to be excessively applied or insufficiently applied in the first determination step and the second determination step is calculated. Then, the calculated area is divided by the area of the entire area of the first base material 1 to which the undercoat material 2 has been applied to calculate the ratio of the calculated area to the area of the entire area of the first base material 1 to which the undercoat material 2 has been applied. . Further, the calculated area ratio is compared with a predetermined third threshold value, and when the area ratio exceeds the third threshold value, it is determined that the application state of the undercoat material 2 is defective.
If the calculated area ratio falls below the third threshold value, it is determined that the application state of the undercoat material 2 is good.
Here, the third threshold value is set as follows. First, the relationship between the adhesive strength and the ratio of the area of the area determined to be excessively applied or insufficiently applied to the area of the entire area where the undercoat material 2 is applied is grasped in advance. This relationship is as follows. When the ratio of the area is small, the ratio of the excess application or the insufficient application is small, so that the adhesive strength is increased. On the other hand, when the ratio of the area is large, the ratio of excessive coating or insufficient coating is increased, so that the adhesive strength is reduced. Then, the ratio of the area at the lower limit value of the adhesive strength allowed on the product is set as the third threshold value.
Thus, by comparing the area ratio with the third threshold value, it is determined whether the adhesive strength is sufficient for the entire product.
In addition, the first determination step, the second determination step, and the third determination step are collectively referred to simply as a determination step. Further, the above-described first threshold value, second threshold value, and third threshold value are collectively referred to simply as threshold values.

The bonded structure 10 is inspected as described above.
The method of manufacturing the bonded structure 10 includes the steps of the above-described inspection method, and further includes the following steps.
(Adhesive application step)
In the third determination step, when it is determined that the application state of the undercoat material 2 is good, the adhesive 4 is subsequently applied onto the undercoat material 2.
(Gluing step)
Then, the second base material 5 is disposed on the adhesive 4, and the first base material 1 and the second base material 5 are bonded to each other by performing a process such as drying or heating. The body 10 is manufactured.

  In addition, the applied undercoating material 2 is removed from the adhesive structure 10 determined to be defective in application, applied again, and inspected again.

Next, the relationship between the applied amount of the undercoat material 2 and the adhesive strength between the first base material 1 and the second base material 5 will be described.
Here, an actual bonded structure 10 was prepared, and the amount of the undercoat material 2 applied and the form of destruction of the bonded portion composed of the undercoat material 2 and the adhesive 4 were investigated. The undercoat material 2 is made of a synthetic rubber-based composition, the first base material 1 and the second base material 5 are made of a SUS304 metal material, the adhesive 4 is made of a urethane-based adhesive, and the magnetic powder 3 Prepared Fe ₃ O ₄ . The average particle diameter of Fe ₃ O ₄ used here was measured with a scanning electron microscope.
First, the undercoat material 2 in which the magnetic powder 3 is dispersed is applied to the surface of the first base material 1 and dried, and the magnetic flux density on the surface of the first base material 1 is measured with a Hall element. Was determined.
Then, the adhesive 4 is applied on the undercoating material 2 and adhered to the second base material 5, and a shear tensile test is performed in accordance with JIS K6850. The form was specified.
FIG. 4B shows the measurement results of the magnetic flux density at each measurement position on the first base material 1. At the measurement position where the magnetic flux density is included in the region A, as a result of observation, it was found that the cohesive failure in which the fracture occurred inside the adhesive 4 accounted for 40% or more. Cohesive failure is a form of failure that depends on the strength of the adhesive, and has little relevance to the amount of the undercoat material 2 applied. Therefore, it can be determined that good adhesion has been achieved in the region A (cohesive failure region). Regions B and C are regions in which cohesive failure is less than 40%, and in region B, interfacial fracture in which fracture occurs at the interface between the adhesive 4 and the first base material 1 (or the undercoat material 2) is predetermined. Was included in the proportion. Interfacial fracture is a form of destruction caused by insufficient adhesion between the adhesive 4 and the first base material 1 because the applied amount of the undercoat material 2 is small, and is mainly an area where the applied amount of the undercoat material 2 is small. Seen in B. Therefore, in the area B (interfacial fracture area), it can be determined that the adhesive strength is reduced because the applied amount of the undercoat material 2 is small. In the region C, a predetermined percentage of internal destruction in which destruction occurs inside the undercoat material 2 was included. The internal destruction occurs because the amount of the undercoat material 2 applied is large, so that the adhesive 4 and the first base material 1 do not sufficiently adhere to each other. This is a form of destruction that occurs as a result, and is seen in region C. In the region C, it can be determined that the adhesive strength has decreased because the applied amount of the undercoat material 2 is excessive.
Summarizing the above investigation results, when the applied amount of the undercoat material 2 is excessive (region C), internal destruction is likely to occur, so that the adhesive strength is reduced. If the amount of the undercoat material 2 is insufficient (region B), the interface strength is apt to occur, so that the adhesive strength is reduced.

Next, an inspection is performed on the actual bonded structure 10 by the inspection method according to the first embodiment of the present invention. By comparing the results of the determination as to whether or not the adhesive strength was determined by observing the form, it was verified whether the inspection method according to Embodiment 1 of the present invention could determine whether or not the adhesive strength was sufficient.
First, an actual bonded structure 10 was prepared. An undercoat material 2 of a synthetic rubber composition in which Fe ₃ O ₄ was dispersed was applied to a long sample made of SUS304 having a length of 500 mm, dried, and the magnetic flux density was measured with a Hall element. It was determined whether or not the adhesive strength was sufficient using a third threshold value set in advance.
Next, a urethane-based adhesive 4 was applied on the undercoat material 2 and adhered to the second substrate 5. Thereafter, a sample having a length of 500 mm is divided into five equal parts each having a length of 100 mm, and a shear tensile test is performed on each of the five divided samples in accordance with JIS K6850. When the adhesive part is broken, the adhesive part is observed. The failure mode was identified. As a result of the observation, if more than half of the bonded parts are cohesive failure, it is determined that the adhesive strength is sufficient, and if more than half of the bonded parts are interfacial fracture or internal fracture, it is determined that the adhesive strength is not sufficient. did.
The judgment by the inspection and the observation by the above inspection method was performed on 14 types of samples. Among the 14 types of samples, 6 types match the average particle diameter (5 nm to 500 nm) and the concentration (0.01 wt% to 10 wt%) of the magnetic powder 3 specified in the first embodiment of the present invention. (Examples 1 to 6). In addition, among the 14 types of samples, the 8 types of samples used did not match the average particle size or concentration (Comparative Examples 1 to 8).
The judgment result based on the inspection method according to the first embodiment of the present invention described above is compared with the judgment result based on the observed destruction mode, and when they match, the result is Δ, and when they do not match, the result is ×. FIG. 5 shows the results. The second and third columns from the left in FIG. 5 indicate the concentration and the average particle diameter of the sample, respectively. The description “Comparison result (X to Ymm)” in the first line from the top indicates a sample in a section of X to Ymm when a sample of 500 mm in length is divided into five equal parts each having a length of 100 mm.
As shown in FIG. 5, in Examples 1 to 6, the results of the determination based on the inspection method and the results of the determination based on the observed destruction mode all coincided. From this, it can be determined that the inspection method according to Embodiment 1 of the present invention is effective for determining the adhesive strength.
On the other hand, in Comparative Examples 1 to 8, the comparison results may not match. In Comparative Example 1, Comparative Example 2, Comparative Example 3, Comparative Example 5, and Comparative Example 6, since the average particle diameter was large or the concentration was high, the magnetic powder 3 settled in the undercoat material 2 and the dispersion was sufficiently high. The cause is probably not being done. In Comparative Examples 4 and 7, it is considered that the cause is that the concentration of the magnetic powder 3 was low and the accuracy of the magnetic flux density measurement was reduced. In Comparative Example 8, since the magnetic substance powder 3 was not contained, all the determination results based on the inspection method resulted in insufficient bonding strength, and thus the comparison results did not match.

The inspection method, the bonded structure 10 and the method of manufacturing the same according to Embodiment 1 of the present invention are configured as described above, and have the following effects.
In the first embodiment, the undercoat material 2 in which the magnetic powder 3 is dispersed is applied to the first substrate 1 and the strength of the magnetic field is measured. Since the magnetic powder 3 is uniformly dispersed in the undercoat material 2, there is a correlation between the thickness of the undercoat material 2 and the strength of the magnetic field. Therefore, the thickness of the undercoat material 2 can be determined based on the strength of the magnetic field.
Therefore, the inspection method of the first embodiment can accurately determine the application state of the undercoat material 2. The adhesive structure 10 and the method of manufacturing the same according to the first embodiment can accurately determine the application state of the undercoat material 2, so that quality control of the adhesive structure 10 can be easily performed.

In the first embodiment, the thickness of the undercoat material 2 can be determined based on the strength of the magnetic field as described above.
Therefore, the inspection method of the first embodiment can accurately determine whether the undercoat material 2 is excessively applied. In addition, it is possible to accurately determine whether or not the undercoat material 2 is insufficiently applied. The adhesive structure 10 and the method of manufacturing the same according to the first embodiment can accurately determine whether the undercoat material 2 is excessively applied, and determine whether the undercoat material 2 is insufficiently applied. Can be accurately determined, so that the quality control of the bonded structure 10 can be easily performed.

In the first embodiment, it is determined whether or not the application of the undercoat material 2 is defective, using the ratio of the area of the over-applied or under-applied region to the area of the under-coat material 2 applied. Even if there is an excessive application or an insufficient application in a limited portion of the area where the undercoat material 2 is applied, the adhesive strength may be sufficient as a whole. Is determined.
Therefore, the inspection method of the first embodiment can accurately determine whether the product has an appropriate adhesive strength. The adhesive structure 10 and the method for manufacturing the same according to the first embodiment can accurately determine whether a product has appropriate adhesive strength, and can easily perform quality control of the adhesive structure 10.

In the first embodiment, the average particle diameter of the magnetic particles contained in the magnetic powder 3 to be dispersed is 5 nm to 500 nm. By setting the average particle diameter in such a range, the magnetic substance powder 3 can be easily produced, and the dispersibility in the undercoat material 2 can be improved.
Therefore, the inspection method according to the first embodiment can accurately determine over-application, under-application, and application failure. The adhesive structure 10 and the method of manufacturing the same according to the first embodiment can accurately determine excessive application, insufficient application, and application failure, and can easily perform quality control of the adhesive structure 10.

In the first embodiment, the mixing ratio of the magnetic powder 3 to the undercoat material to be dispersed is set to 0.01 wt% to 10 wt%. By setting the mixing ratio in such a range, the strength of the magnetic field can be detected with high accuracy, and the dispersibility in the undercoat material 2 can be improved.
Therefore, the inspection method according to the first embodiment can accurately determine over-application, under-application, and application failure. The adhesive structure 10 and the method of manufacturing the same according to the first embodiment can accurately determine excessive application, insufficient application, and application failure, and can easily perform quality control of the adhesive structure 10.

Here, a supplementary description and a modification of the first embodiment of the present invention will be described.
In the first embodiment, an arbitrary material can be selected as the undercoat material 2. However, a conductive material can also be selected. Although the first base material 1 and the second base material 5 may be made of any materials, an insulating material can be selected.
When the undercoat material 2 is conductive, or when the first base material 1 or the second base material 5 is an insulating material, the eddy current measuring device used in the inspection method of Patent Document 1 described above. In this case, it is not possible to determine the insufficient application as well as the excessive application. When the undercoat material 2 is conductive, eddy current flows on the surface of the undercoat material 2 irrespective of the amount of application of the undercoat material 2, and it cannot be determined even if the undercoat material 2 is insufficient. Further, when the first base material 1 or the second base material 5 is an insulating material, eddy current does not flow through the base material, so that eddy current cannot be measured and determination cannot be made even if coating is insufficient. . On the other hand, since the inspection method and the bonding structure 10 according to Embodiment 1 of the present invention measure the strength of the magnetic field of the magnetic powder 3, even if the undercoat material 2 is conductive, Further, even if the first base material 1 or the second base material 5 is insulative, it is possible to accurately determine over-application, under-application, and application failure with high accuracy.

  In the inspection method according to the first embodiment, the example in which the first base material 1 and the second base material 5 are bonded has been described. However, a coating film is applied to the first base material 1 with a coating material. The present inspection method may be used when forming. The coating film provides, for example, antifouling property or water repellency to the first base material 1. Even when a coating film is formed, the undercoat material 2 is used to improve the adhesive strength between the first base material 1 and the coating film, and the adhesive strength is reduced due to excessive or insufficient application of the undercoat material 2. May decrease. Therefore, by inspecting the application state of the undercoat material 2 by the inspection method of the first embodiment, it is possible to accurately determine the excessive application, the insufficient application, and the application failure.

  Further, in the adhesive structure 10 of the first embodiment, the primer material 2 is disposed between the first base material 1 and the adhesive 4, but as shown in FIG. The undercoat material 2 may be disposed between the adhesives 4, and a material in which the magnetic powder 3 is dispersed in the undercoat material 2 may be used between the second base material 5 and the adhesive 4. In this case, the application state of the undercoat material 2 may be inspected not only for the first substrate 1 but also for the second substrate 5 using the inspection method of the first embodiment.

  Further, before the undercoating material applying step in the inspection method of the first embodiment, the surface of the first base material 1 may be subjected to an ultraviolet treatment, a corona treatment, a flame treatment, a blast treatment, or the like. By performing such a process, the adhesive strength between the first substrate 1 and the adhesive 4 can be improved. In addition, by performing such a process, it is possible to obtain an adhesive structure 10 having high adhesive strength. Such a treatment may be performed on the second base material 5.

  In the first embodiment, the first base material 1 and the second base material 5 may be made of any material, but may be made of a magnetic material such as a steel material. In this case, the magnetic flux density of the surface of the first base material 1 where the magnetic powder 3 is not attached (that is, the undercoat material 2 is not applied) is measured, and this magnetic flux density is used as a reference value, The difference between the magnetic flux density in the region where the body powder 3 is attached and the reference value may be used as the strength of the magnetic field.

  Further, the adhesive 4 of the adhesive structure 10 of the first embodiment may be an anaerobic adhesive. When an anaerobic adhesive is used as the adhesive 4, the undercoat material 2 is a curing accelerator for accelerating the curing of the anaerobic adhesive. Although any material can be selected as the curing accelerator, it is a composition containing copper ions for accelerating the curing. As the solvent component, any volatile solvent may be used, and examples thereof include toluene, cyclohexane, ethanol, methanol, propanol, and 2-butanone.

Embodiment 2
Next, a second embodiment of the present invention will be described. A description of the same parts as those in the configuration and operation described in the first embodiment will be omitted, and parts different from the first embodiment will be described below. In addition. The inspection method of the second embodiment and the method of manufacturing the bonded structure 10 can be implemented in combination with the inspection method of the first embodiment and its modified examples.
The inspection method and the method for manufacturing the bonded structure 10 according to the second embodiment include, in addition to the inspection method and the method for manufacturing the bonded structure 10 according to the first embodiment, at least a portion of the magnetic substance powder 3 is recovered from the undercoat material 2. The method further includes a collecting step of performing the following.

The recovery step may be performed simultaneously with or separately from any one of the first determination step, the second determination step, and the third determination step after the measurement step, but is performed at least after the volatile solvent has volatilized. . Also, it is performed at the latest before the adhesive application step. As shown in FIG. 7, in the collection step, the magnetic substance collection device 13 is moved close to the surface of the first base material on which the undercoat material 2 has been applied. The magnetic material recovery device 13 is a device that generates a magnetic field, and is, for example, a permanent magnet or an electromagnet. As the permanent magnet, a ferrite magnet such as a barium ferrite magnet or a strontium ferrite magnet, a rare earth magnet such as a samarium cobalt magnet or a neodymium magnet, or a bond magnet such as a ferrite plastic magnet or a neodymium plastic magnet can be used.
When the magnetic material recovery device 13 is moved while generating a magnetic field, the magnetic material powder 3 present on the surface of the first base material 1 can be recovered by magnetic attraction.
The distance between the surface of the first substrate 1 and the magnetic material recovery device 13 and the strength of the magnetic field of the magnetic material recovery device 13 are determined based on the type and average particle diameter of the magnetic material powder 3. May be arbitrarily selected so as to be collected.

  Further, even if the magnetic material powder 3 is recovered by the magnetic material recovery device 13, not all the magnetic material powder 3 contained in the undercoat material 2 can be recovered, but there is a problem with the quality of the bonding structure 10, for example, the bonding strength. It is only necessary to be able to recover to a level without any. In addition, since the adhesive strength is affected according to the amount of the magnetic material powder 3 collected, the threshold value may be changed according to the amount of the magnetic material powder 3 to be collected or collected. That is, when the amount of collection is large, the adhesive strength of the adhesive structure 10 is increased. For example, the first threshold value may be increased to make it difficult to determine that the excessive application is performed. Alternatively, the second threshold value may be reduced to make it difficult to determine that the application group is a tribe. Further, the third threshold value may be increased to make it difficult to determine that the coating is defective.

  By using the inspection method and the manufacturing method as described above, the adhesive structure 10 in which the magnetic powder 3 remaining in the undercoat material 2 is smaller than the adhesive structure 10 of the first embodiment can be obtained. .

The inspection method and the method for manufacturing the bonded structure 10 according to the second embodiment of the present invention are configured as described above, and have the following effects.
Since the inspection method and the method for manufacturing the bonded structure 10 according to the second embodiment of the present invention include a recovery step, the magnetic powder 3 remains in the undercoat material 2 and affects the quality of the bonded structure 10. The effect can be reduced.
In addition, in the adhesive structure 10 according to Embodiment 2 of the present invention, the remaining amount of the magnetic substance powder 3 is small, so that the quality of the magnetic substance powder 3 hardly affects the quality.

  Since the inspection method and the method for manufacturing the bonded structure 10 according to the second embodiment of the present invention include a recovery step, the recovered magnetic powder 3 can be reused for another inspection, and the manufacturing cost is reduced. can do.

  In the inspection method and the method for manufacturing the bonded structure 10 according to the second embodiment of the present invention, the recovery step is performed after the volatile solvent has evaporated. If the recovery step is performed before the volatile solvent is volatilized, the undercoat material 2 is deformed due to the influence of the magnetic field, and the measured magnetic flux density and the thickness of the undercoat material 2 cannot be correlated. By performing the process after volatilization of, the overcoating, the undercoating, or the coating failure can be accurately determined.

  In the second embodiment, it is preferable that the first base member 1 is made of a non-magnetic material. Since the first base material 1 is non-magnetic, the magnetic substance powder 3 can be easily collected in the collection step.

Embodiment 3
Next, a third embodiment of the present invention will be described. A description of the same parts as those in the configuration and operation described in the first embodiment will be omitted, and parts different from the first embodiment will be described below. In addition. The contents of the bonded structure 10 and the modifications thereof described in the first and second embodiments can be applied to the elevator of the third embodiment.
Embodiment 3 relates to an elevator 20, and more specifically, to a panel 21 forming a car wall or the like of the elevator 20. As shown in FIG. 8A, the panel 21 is a plate-like member that forms a wall of a car, and a plurality of reinforcing members 25 for reinforcing the strength of the panel 21 are attached to the panel 21. It is attached. As shown in FIG. 8B, the adhesive 4 is disposed between the panel 21 and the reinforcing member 25, and the panel 21 and the reinforcing member 25 are bonded. The undercoat material 2 in which the magnetic powder 3 is dispersed is disposed between the adhesive 4 and the panel 21.
Note that the panel 21 corresponds to a first base, and the reinforcing member 25 corresponds to a second base.

The elevator 20 according to Embodiment 3 of the present invention is configured as described above, and has the following effects.
In the elevator 20, the magnetic powder 3 is dispersed in the undercoat material 2. Therefore, it is possible to accurately determine over-application, under-application, or application failure using the inspection method of Embodiment 1 or 2. Therefore, quality control can be easily performed.

  In the third embodiment, the undercoat material 2 is disposed between the adhesive 4 and the panel 21, but may be disposed between the adhesive 4 and the reinforcing member 25, or may be disposed on both.

Embodiment 4
Next, a fourth embodiment of the present invention will be described. A description of the same parts as those in the configuration and operation described in the first embodiment will be omitted, and parts different from the first embodiment will be described below. In addition. The bonded structure 10 described in the first and second embodiments and its modified example can be applied to the artificial satellite of the fourth embodiment.
Embodiment 4 relates to an artificial satellite 30, and more specifically, to a substrate 31 extending from a housing constituting an outer wall of the artificial satellite 30. As shown in FIG. 9, the substrate 31 has a honeycomb-shaped structure sandwiched between two plates, and the substrate 31 generates electric power to supply electric power to the artificial satellite 30. The solar cell 35 to be performed is attached. The adhesive 4 is disposed between the substrate 31 and the solar cell 35, and the substrate 31 and the solar cell 35 are bonded. The undercoat material 2 in which the magnetic powder 3 is dispersed is disposed between the adhesive 4 and the substrate 31.
Note that the substrate 31 corresponds to a first base material, and the solar cell 35 corresponds to a second base material.

The artificial satellite 30 according to Embodiment 4 of the present invention is configured as described above, and has the following effects.
The artificial satellite 30 has the magnetic powder 3 dispersed in the undercoat material 2. Therefore, it is possible to accurately determine over-application, under-application, or application failure using the inspection method of Embodiment 1 or 2. Therefore, quality control can be easily performed.

  In the fourth embodiment, the undercoat material 2 is disposed between the adhesive 4 and the substrate 31, but may be disposed between the adhesive 4 and the solar cell 35, or may be disposed on both. .

INDUSTRIAL APPLICABILITY The method for inspecting a primer according to the present invention can be used for inspecting the thickness of a primer when manufacturing an adhesive structure such as an elevator or an artificial satellite.
The adhesive structure can be used as a building material or a component of a device. Elevators can be used as means of transportation within buildings. Artificial satellites can be used for weather observation and the like. The method for manufacturing the bonded structure can be used for manufacturing the bonded structure as described above.

DESCRIPTION OF SYMBOLS 1 1st base material, 2 undercoat materials, 3 magnetic substance powders, 4 adhesives, 5 2nd base materials, 10 bonded structures, 11 magnetic field application devices, 12 magnetic sensors, 13 magnetic material recovery devices, 20 elevators, 21 panels, 25 reinforcing members, 30 satellites, 31 substrates, 35 solar cells

Claims (18)

An undercoat material applying step of applying the undercoat material in which the magnetic powder is dispersed to the base material,
Measuring step of measuring the strength of the magnetic field on the surface of the substrate coated with the undercoat material,
By comparing the strength of the measured magnetic field and a predetermined threshold, a determination step of determining the application state of the undercoat material,
Inspection method of undercoating material provided with. The determination step includes a first determination step of determining that the undercoat material is excessively applied when the measured strength of the magnetic field exceeds a predetermined first threshold. The method for inspecting a primer material according to claim 1. The determining step includes a second determining step of determining that application of the undercoat material is insufficient when the strength of the magnetic field is lower than a second predetermined threshold value. The method for inspecting an undercoat material according to claim 1 or 2. The determining step includes:
A first determination step of determining that the undercoat material is excessively applied when the measured strength of the magnetic field exceeds a predetermined first threshold value;
When the strength of the magnetic field is less than a predetermined second threshold, a second determination step of determining that the application of the undercoat material is insufficient,
Comparing the ratio of the area of the region exceeding the first threshold or the area of the region below the second threshold to the area of the surface of the base material to which the undercoat material is applied with a third threshold, and comparing the undercoat material 3. A method for inspecting an undercoat material according to claim 1, further comprising: a third determination step of determining whether the application of the undercoat material is defective. The undercoat material according to any one of claims 1 to 4, wherein the magnetic particles contained in the magnetic powder dispersed in the undercoat material have an average particle size of 5 nm to 500 nm. Inspection method. The undercoat according to any one of claims 1 to 5, wherein a mixing ratio of the magnetic powder dispersed in the undercoat to the undercoat is from 0.01 wt% to 10 wt%. Inspection method of materials. The method for inspecting an undercoat material according to any one of claims 1 to 6, wherein the undercoat material is formed of a conductive material. The method for inspecting an undercoat material according to any one of claims 1 to 7, wherein the base material is made of an insulating material. After the measuring step, by bringing a magnetic material recovery device that generates a magnetic field close to the surface of the base material on which the undercoat material is applied, a recovery that recovers at least a portion of the magnetic material powder from the undercoat material The method for inspecting an undercoat material according to any one of claims 1 to 8, further comprising a step. The undercoat material contains a volatile solvent,
The method for inspecting an undercoat material according to claim 9, wherein the collecting step is performed after the volatile solvent is volatilized. The method for inspecting an undercoat material according to claim 9, wherein the base material is made of a non-magnetic material. The inspection of the undercoat material according to any one of claims 1 to 11, wherein the undercoat material is a primer for bonding an adhesive applied on the undercoat material and the base material. Method. The undercoat material inspection method according to any one of claims 1 to 11, wherein the undercoat material is a curing accelerator that cures an anaerobic adhesive applied on the undercoat material. . A first substrate;
An undercoat material disposed on the first base material and containing a dispersed magnetic material powder;
An adhesive disposed on the undercoat material,
A second substrate disposed on the adhesive and bonded to the first substrate by the adhesive;
Adhesive structure provided with. Panels that make up the walls of the elevator car;
A reinforcing member for reinforcing the panel,
An undercoat material disposed on one of the panel or the reinforcing member and containing a dispersed magnetic powder,
An adhesive that is disposed on the undercoat material and bonds the panel and the reinforcing member,
Elevator with A housing,
A substrate extending from the housing;
A solar cell that is adhered to the substrate and performs power generation;
An undercoat material that is disposed on one of the substrate or the solar cell and contains a dispersed magnetic material powder,
An adhesive disposed on the undercoat material and bonding the substrate and the solar cell,
Satellite with. An undercoat material applying step of applying the undercoat material in which the magnetic powder is dispersed to the first base material,
A measuring step of measuring the strength of the magnetic field on the surface of the first base material to which the undercoat material has been applied,
By comparing the strength of the measured magnetic field and a predetermined threshold, a determination step of determining the application state of the undercoat material,
When the application state is determined to be good, an adhesive application step of applying an adhesive on the undercoat material,
An adhesion step of adhering a second substrate on the adhesive applied on the undercoat material,
A method for producing an adhesive structure comprising: Between the measurement step and the adhesive application step, by bringing a magnetic material recovery device that generates a magnetic field close to the surface of the first substrate on which the undercoat material is applied, The method according to claim 17, further comprising a collecting step of collecting at least a part from the undercoat material.

Images