Resin-coated member

Abstract

To provide a resin-coated member with enhanced balance between the peelability and adhesiveness of a resin layer.SOLUTION: A resin-coated member 10 includes: a member 12 having a body 12a; and a resin layer 16 that covers the surface of the body 12a and is composed of a resin. A low adhesive layer 14, composed of a low adhesive, is interposed between the body 12a and the resin layer 16 over the whole area.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present disclosure relates to a resin-coated member.

Background Art

[0002] Conventionally, a resin sheet has been coated on the surface of members such as steel members used in structures such as plants, bridges, and gates to enhance the corrosion resistance, waterproofness, etc. of the members (see Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] By the way, when the resin layer such as a resin sheet coated on a member such as a steel member has deteriorated over time, etc., after peeling the deteriorated resin layer from the member, a new resin layer is again coated. Further, when the member is painted, when the paint film has deteriorated over time, after peeling the resin layer, the member is repainted and a new resin layer is coated.

[0005] Here, when peeling the resin layer from the member, if the resin layer and the member are firmly adhered, it may take a lot of time for the above-described resin layer peeling operation. On the other hand, when the adhesion between the resin layer and the member is low, the resin layer is likely to be peeled off from the member, and a corrosive medium such as water is likely to enter through the gap between the resin layer and the member. For this reason, there is a possibility that the corrosion resistance, waterproofness, etc. may decrease.

[0006] Therefore, an object of the present disclosure is to provide a resin-coated member capable of improving the peelability and adhesion of the resin layer in a well-balanced manner.

Means for Solving the Problems

[0007] The resin-coated member according to this disclosure comprises a member having a member body, a resin layer formed of resin and covering the surface of the member body, and a low-tack layer formed of a low-tack agent provided over the entire surface between the member body and the resin layer. The member has an extended portion that extends around the main body of the member, the extended portion is covered with the resin layer, and the low-tack layer is not included between the extended portion and the resin layer.

[0010] The resin-coated member according to this disclosure may have an adhesive layer provided between the extended portion and the resin layer, formed of an adhesive or adhesive tape.

[0011] In the resin-coated member according to this disclosure, the member may have an uneven surface on the main body of the member.

[0012] In the resin-coated member according to this disclosure, the adhesive layer may be provided between the uneven portion and the resin layer.

[0013] In the resin-coated member according to the present disclosure, the member may have a member body comprising a plurality of member plates and fastening portions for fastening adjacent member plates.

[0014] In the resin-coated member according to this disclosure, the adhesive layer may be provided between the fastening portion and the resin layer.

[0015] In the resin-coated member according to this disclosure, the adhesion force between the resin layer and the adhesive layer may be greater than the adhesion force between the member body and the low-tack layer.

[0016] In the resin-coated member according to this disclosure, the adhesive may be a glue, a fluororesin agent, or a silicone resin agent.

[0017] In the resin-coated member according to this disclosure, the adhesive may be a polyvinyl alcohol resin, a vinyl acetate resin, a polyvinylpyrrolidone resin, or a starch agent.

[0018] In the resin-coated member according to the present disclosure, the resin layer may be formed of a polyurea resin, a urethane resin, or a vinyl chloride resin.

[0019] In the resin-coated member according to the present disclosure, the resin layer may be formed of a transparent resin.

[0022] In the resin-coated member according to the present disclosure, a coating film may be provided on the surface of the member.

Advantages of the Invention

[0023] According to the resin-coated member having the above configuration, the peelability and adhesion of the resin layer can be enhanced in a well-balanced manner.

Brief Description of the Drawings

[0024] [Figure 1] In the first embodiment of the present disclosure, it is a schematic plan view showing the configuration of a resin-coated member. [Figure 2] In the first embodiment of the present disclosure, it is a schematic cross-sectional view taken along the line A-A of FIG. 1. [Figure 3] In the first embodiment of the present disclosure, it is a flowchart showing a method for manufacturing a resin-coated member. [Figure 4] In the second embodiment of the present disclosure, it is a schematic cross-sectional view showing the configuration of a resin-coated member. [Figure 5] In the third embodiment of the present disclosure, it is a schematic plan view showing the configuration of a resin-coated member. [Figure 6] In the third embodiment of the present disclosure, it is a schematic cross-sectional view taken along the line A-A of FIG. 5. [Figure 7] In the fourth embodiment of the present disclosure, it is a schematic cross-sectional view showing the configuration of a resin-coated member. [Figure 8] In the fifth embodiment of the present disclosure, it is a schematic cross-sectional view showing the configuration of a resin-coated member. [Figure 9] In the sixth embodiment of the present disclosure, it is a schematic cross-sectional view showing the configuration of a resin-coated member. [Figure 10]This is a schematic cross-sectional view showing the structure of a resin-coated member in the seventh embodiment of the present disclosure. [Figure 11] This graph shows the results of the adhesion strength evaluation test in the embodiments of this disclosure. [Modes for carrying out the invention]

[0025] [First Embodiment] A first embodiment of the present disclosure will be described in detail below with reference to the drawings. Figure 1 is a schematic plan view showing the configuration of the resin-coated member 10. Figure 2 is a schematic cross-sectional view in the direction AA of Figure 1. The resin-coated member 10 comprises a member 12, a low-tackiness layer 14, and a resin layer 16.

[0026] Member 12 has a member body 12a. Member 12 is made of a metal member formed from a metal material such as steel, or a concrete member formed from a concrete material. Member 12 is, for example, a structural member used in structures such as plants, bridges, and sluice gates. Member 12 is made of, for example, a flat plate member. Member 12 may be painted to improve corrosion resistance and waterproofing, and a coating may be provided on the surface of member 12.

[0027] The resin layer 16 is coated on the surface of the member body 12a and is made of resin. The resin layer 16 preferably covers the entire surface of the member body 12a. By covering the surface of the member body 12a with the resin layer 16, the surface of the member body 12a can be protected. For example, by covering the surface of the member body 12a with the resin layer 16, the corrosion resistance and waterproofing of the member 12 can be improved. Furthermore, by covering the surface of the member body 12a with the resin layer 16, damage such as scratches on the surface of the member 12 can be suppressed. The thickness of the resin layer 16 can be, for example, 100 μm to 3 mm. The resin layer 16 can be made of thermoplastic resin, thermosetting resin, etc. For the resin of the resin layer 16, for example, polyurea resin, urethane resin, polyvinyl chloride resin, etc. can be used.

[0028] The resin layer 16 is preferably made of a highly elastic resin. When the resin layer 16 is made of a highly elastic resin, the resin layer 16 has high elastic force. This allows it to follow microcracks and the like even if they occur in the resin layer 16, thus suppressing fracture of the resin layer 16. For example, polyurea resin is suitable for such a highly elastic resin. The resin layer 16 is preferably made of a transparent resin. Since the resin layer 16 is transparent, the surface condition of the member 12 can be inspected and observed from the outside. For example, transparent polyurea resin is suitable for such a transparent resin.

[0029] The low-tack layer 14 is provided across the entire surface between the member body 12a and the resin layer 16, and is made of a low-tack material. The low-tack layer 14 covers the entire surface of the member body 12a. This allows for a good balance between the peelability and adhesion of the resin layer 16. By providing the low-tack layer 14 across the entire surface between the member body 12a and the resin layer 16, the peel load of the resin layer 16 may be set to 2KN or more and 85KN or less, or to 2KN or more and 10KN or less, according to the adhesion strength measurement method in accordance with JIS Z0237.

[0030] The low-tack agent should have a lower adhesive strength than the resin forming the resin layer 16. The low-tack agent can be, for example, an adhesive, a fluororesin agent, a silicone resin agent, etc. The adhesive agent can be, for example, a polyvinyl alcohol resin agent, a vinyl acetate resin agent, a polyvinylpyrrolidone resin agent, a starch agent, etc. These low-tack agents can reduce the adhesion between the member body 12a and the resin layer 16. More specifically, the adhesion between the member body 12a and the low-tack agent layer 14, and the adhesion between the resin layer 16 and the low-tack agent layer 14, are reduced to be less than the adhesion between the member body 12a and the resin layer 16.

[0031] The solvent for the low-tack agent can be water, an organic solvent, or the like. When the low-tack agent is an adhesive such as a polyvinyl alcohol resin or a vinyl acetate resin, water is preferable as the solvent. When the low-tack agent is a fluororesin or a silicone resin, an organic solvent is preferable as the solvent. Furthermore, when the resin layer 16 is formed from an organic solvent-based resin, it is preferable to use a low-tack agent that uses water as the solvent, because this suppresses the elution of the low-tack agent layer 14 during the formation of the resin layer 16.

[0032] For low tackiness, adhesives are suitable. Adhesives such as polyvinyl alcohol resins and vinyl acetate resins can reduce the adhesion between the component body 12a and the resin layer 16 more effectively than fluororesin or silicone resins. This allows for a good balance between the release and adhesion properties of the resin layer 16. Furthermore, since water can be used as the solvent for the adhesive, the elution of the low tackiness layer 14 can be suppressed during the formation of the resin layer 16, even when the resin layer 16 is formed from an organic solvent-based resin.

[0033] The adhesion force between the resin layer 16 and the low-tack layer 14 should be greater than the adhesion force between the member body 12a and the low-tack layer 14. When the resin layer 16 is peeled off from the resin-coated member 10, the low-tack layer 14 adheres to the resin layer 16, allowing the resin layer 16 and the low-tack layer 14 to be peeled off almost simultaneously. This suppresses the residue of the low-tack layer 14 on the surface of the member body 12a, thus enabling efficient peeling of the resin layer 16. For example, if the member 12 is made of stainless steel, the resin layer 16 is made of polyurea resin, and the low-tack layer 14 is made of polyvinyl alcohol resin, when the resin layer 16 is peeled off, the resin layer 16 and the low-tack layer 14 can be peeled off almost simultaneously, thus suppressing the residue of the low-tack layer 14 on the surface of the member body 12a.

[0034] Next, a method for manufacturing the resin-coated member 10 will be described. Figure 3 is a flowchart showing the method for manufacturing the resin-coated member 10. The method for manufacturing the resin-coated member 10 comprises a low-tackiness layer formation step (S10) and a resin layer formation step (S12).

[0035] The low-tack layer formation step (S10) is a step in which a low-tack layer 14 is formed on the surface of the member body 12a using a low-tack agent. In the low-tack layer formation step (S10), a low-tack layer 14 is formed on the entire surface of the member body 12a using a low-tack agent. First, it is preferable to pre-treat the surface of the member body 12a before forming the low-tack layer 14 on the surface of the member body 12a. If the member 12 is a metal member, it can be pre-treated by pickling, mechanical polishing, degreasing, etc. These pre-treatments can be performed using general pre-treatment methods for metal materials.

[0036] Next, a method for forming the low-tack layer 14 will be described. The low-tack layer 14 can be formed by spraying, brushing, or otherwise applying a low-tack agent. The low-tack agent can be the adhesive, fluororesin agent, silicone resin agent, etc., as described above. Commercially available low-tack agents can be used. After applying the low-tack agent to the surface of the member body 12a, it is advisable to dry it at room temperature or the like to remove the solvent.

[0037] The resin layer formation step (S12) is a step in which a resin is applied to the surface of the low-tack layer 14 to form a resin layer 16. In the resin layer formation step (S12), it is preferable to apply the resin to the entire surface of the low-tack layer 14 to form the resin layer 16. The resin layer 16 can be formed by spraying or coating an uncured resin onto the surface of the member body 12a provided with the low-tack layer 14, and then curing the resin by heating or the like. The resin can be the polyurea resin mentioned above. Generally commercially available resins can be used. In this way, the resin-coated member 10 can be manufactured.

[0038] As described above, the resin-coated member comprises a member having a member body, a resin layer formed of resin covering the surface of the member body, and a low-tack layer formed of a low-tack agent provided across the entire area between the member body and the resin layer, thereby enabling a good balance between the peelability and adhesion of the resin layer.

[0039] [Second Embodiment] Next, a second embodiment of the present disclosure will be described in detail with reference to the drawings. Figure 4 is a schematic cross-sectional view showing the configuration of the resin-coated member 20. The second embodiment differs from the first embodiment in that an extension portion 22 is provided around the member body 12a, but the other configurations are the same. Components similar to those in the above embodiment are denoted by the same reference numerals, and detailed descriptions are omitted.

[0040] Member 21 has an extension portion 22 that extends around the member body 12a. The extension portion 22 is provided so as to surround the entire circumference of the member body 12a. The extension portion 22 is covered with a resin layer 16. There is no low-tack layer 14 between the extension portion 22 and the resin layer 16. At the outer periphery between member 21 and the resin layer 16, the adhesion between member 21 and the resin layer 16 is increased, so that the intrusion of corrosive media such as water from the outside of the resin-coated member 20 can be suppressed.

[0041] The resin-coated member 20 may have an adhesive layer (not shown) between the extended portion 22 and the resin layer 16. This further enhances the adhesion between the extended portion 22 and the resin layer 16, thereby further suppressing the intrusion of corrosive media such as water from the outside of the resin-coated member 20. Also, since the extended portion 22 is formed flat, the resin layer 16 can be easily peeled off using a tool (such as a scraper or grinder). The adhesive layer can be formed with an adhesive or adhesive tape. Commercially available products such as general resin-based adhesives can be used as the adhesive or adhesive tape.

[0042] The adhesive layer may be provided only in a portion between the extended portion 22 and the resin layer 16, but it is preferable that it be provided around the entire circumference of the extended portion 22 and the resin layer 16. The adhesive strength between the resin layer 16 and the adhesive layer should be greater than the adhesive strength between the extended portion 22 and the adhesive layer. When the resin layer 16 is peeled off, the adhesive layer adheres to the resin layer 16, so the resin layer 16 and the adhesive layer can be peeled off almost simultaneously. This suppresses the residue of the adhesive layer on the member 21, making the peeling work of the resin layer 16 easier. The adhesive strength between the resin layer 16 and the adhesive layer should be less than the mechanical strength of the resin layer 16. By making the adhesive strength between the resin layer 16 and the adhesive layer less than the mechanical strength of the resin layer 16, when the resin layer 16 is peeled off, the breakage of the resin layer 16 is suppressed, and the resin layer 16 can be peeled off. This makes it possible to improve the peeling workability of the resin layer 16.

[0043] As described above, with the resin-coated member having the above configuration, the member has an extended portion that extends around the main body of the member, and the extended portion is covered with a resin layer. Since there is no low-tack layer between the extended portion and the resin layer, the peelability and adhesion of the resin layer are improved in a balanced manner, and the intrusion of corrosive media such as water from the outside of the resin-coated member can be suppressed.

[0044] [Third Embodiment] Next, a third embodiment of the present disclosure will be described in detail with reference to the drawings. Figure 5 is a schematic plan view showing the configuration of the resin-coated member 30. Figure 6 is a schematic cross-sectional view in the direction AA of Figure 5. Components similar to those in the above embodiments are denoted by the same reference numerals, and detailed descriptions are omitted.

[0045] The resin-coated member 30 comprises a member 12 having a member body 12a, and a resin layer 16 formed of resin that covers the surface of the member body 12a. The resin-coated member 30 has a peeling region 32 and a non-peeling region 34 provided between the member body 12a and the resin layer 16.

[0046] The release region 32 is provided between the member body 12a and the resin layer 16 and is composed of a low-tack layer 14 made of a low-tack agent. The non-release region 34 is provided between the member body 12a and the resin layer 16 and does not include the low-tack layer 14. The non-release region 34 is arranged in a grid pattern. The release region 32 is surrounded by the non-release region 34. By providing the release region 32 and the non-release region 34 between the member body 12a and the resin layer 16, the release and adhesion properties of the resin layer 16 can be improved in a balanced manner. Next, the release region 32 and the non-release region 34 will be described in detail.

[0047] The non-peelable region 34 is provided between the member body 12a and the resin layer 16 and does not include the low-tack layer 14. The non-peelable region 34 is formed in a grid pattern on the surface of the member body 12a. The outer periphery of the member body 12a is also formed by the non-peelable region 34. Since the non-peelable region 34 does not include the low-tack layer 14, the resin layer 16 and the member body 12a are in direct contact. As a result, the adhesion between the member body 12a and the resin layer 16 is enhanced in the non-peelable region 34. In this way, the adhesion between the member body 12a and the resin layer 16 is enhanced in the non-peelable region 34, so that corrosive media such as water can not penetrate between the member body 12a and the resin layer 16.

[0048] The peeling region 32 is provided between the member body 12a and the resin layer 16 and consists of a low-tack layer 14 formed of a low-tack agent. By providing the low-tack layer 14, at least one of the adhesion force between the resin layer 16 and the low-tack layer 14 and the adhesion force between the member body 12a and the low-tack layer 14 can be made smaller than the adhesion force between the member body 12a and the resin layer 16. In the peeling region 32, the adhesion between the member body 12a and the resin layer 16 is reduced by interposing the low-tack layer 14, so the resin layer 16 can be easily peeled off. The low-tack agent of the low-tack layer 14 can be the same as the low-tack agent of the low-tack layer 14 of the first embodiment.

[0049] The peeled area 32 is surrounded by a non-peeled area 34, forming a rectangular shape. More specifically, the entire circumference of the peeled area 32 is surrounded by the non-peeled area 34. Even if peeling occurs in the peeled area 32 during use of the resin-coated member 30, the chain reaction of peeling is suppressed because the peeled areas 32 are discontinuous and do not come into contact with each other. As a result, even if a corrosive medium such as water enters the gap between the member body 12a and the resin layer 16 from the peeled area 32, the corrosive medium is surrounded by the non-peeled area 34, thus suppressing further diffusion of the corrosive medium.

[0050] Next, a method for manufacturing the resin-coated member 30 will be described. The method for manufacturing the resin-coated member 30 comprises a low-tackiness layer formation step and a resin layer formation step.

[0051] The low-tack layer formation step is a step of forming a low-tack layer 14 on the surface of the member body 12a with a low-tack agent. After pre-treating the member body 12a, the non-peelable area 34 of the member body 12a is masked in a grid pattern with a masking material. A general masking tape or the like can be used as the masking material. The low-tack agent is spray-applied to the masked surface of the member body 12a to form the low-tack layer 14. After forming the low-tack layer 14, the masking material is removed from the member body 12a, and a peelable area 32 consisting of the low-tack layer 14 is formed. The method for forming the low-tack layer 14 is the same as the low-tack layer formation step (S10) of the first embodiment, so a detailed explanation is omitted.

[0052] The resin layer formation step is a step of coating the surface of the member body 12a, which is provided with a low-tack layer 14, with resin to form a resin layer 16. The resin layer formation step is the same as the resin layer formation step (S12) of the first embodiment, so a detailed explanation is omitted. In this way, the resin-coated member 30 can be manufactured.

[0053] Furthermore, the resin-coated member 30 may also have an extended portion extending around the main body of the member, similar to the resin-coated member 20 in the second embodiment. At the outer periphery between the member and the resin layer, the adhesion between the member and the resin layer is further increased, which can suppress the intrusion of corrosive media such as water from the outside of the resin-coated member 30.

[0054] The resin-coated member with the above configuration comprises a member having a member body, and a resin layer formed of resin that covers the surface of the member body, and includes a release region provided between the member body and the resin layer and consisting of a low-tack layer formed of a low-tack agent, and a non-release region provided between the member body and the resin layer and not containing the low-tack layer, the non-release region being arranged in a grid pattern, and the release region being surrounded by the non-release region, so that the release and adhesion properties of the resin layer can be improved in a balanced manner.

[0055] [Fourth Embodiment] Next, a fourth embodiment of this disclosure will be described in detail with reference to the drawings. Figure 7 is a schematic cross-sectional view showing the configuration of the resin-coated member 50. Components similar to those in the above embodiments are denoted by the same reference numerals, and detailed descriptions are omitted. The fourth embodiment differs from the first embodiment mainly in the configuration of member 52.

[0056] Member 52 of the resin-coated member 50 has an uneven surface 54 on the surface of the member body 12a. The uneven surface 54 is not particularly limited, but can be made up of, for example, protrusions, webs, flanges, etc. Member 52 may have the uneven surface 54 and a flat surface 56 on the surface of the member body 12a. The arrangement of the uneven surface 54 and the flat surface 56 is not particularly limited, but for example, the flat surface 56 may be arranged in a grid pattern so that the uneven surface 54 is surrounded by the flat surface 56.

[0057] The surface of the member body 12a is covered with a low-tack layer 14. The low-tack layer 14 covers the entire surface of the member body 12a. More specifically, the low-tack layer 14 covers the entire surface of the uneven portion 54 and the flat portion 56 of the member body 12a. When the resin layer 16 is directly covered with the uneven portion 54, the adhesion force of the resin layer 16 becomes stronger due to the anchoring effect of the uneven portion 54. As a result, when peeling off the resin layer 16, the resin layer 16 may break or rupture, reducing the ease of peeling off the resin layer 16. On the other hand, by providing the low-tack layer 14 on the uneven portion 54, the adhesion force between the uneven portion 54 and the resin layer 16 is reduced, making it easier to peel off the resin layer 16 from the member body 12a when peeling it off.

[0058] The low-tack layer 14 on the uneven portion 54 may use the same low-tack agent as the low-tack layer 14 on the flat portion 56, or it may use a different low-tack agent. By forming the low-tack layer 14 on the uneven portion 54 and the low-tack layer 14 on the flat portion 56 with the same low-tack agent, the productivity of the resin-coated member 50 can be improved. For example, the low-tack layer 14 covering the uneven portion 54 and the flat portion 56 can be formed using the same adhesive.

[0059] Furthermore, when the low-tack layer 14 of the uneven portion 54 and the low-tack layer 14 of the flat portion 56 are formed with different low-tack materials, it is preferable to use a low-tack material with lower adhesive strength for the low-tack layer 14 of the uneven portion 54 than for the low-tack layer 14 of the flat portion 56. This is because, as mentioned above, the uneven portion 54 has a stronger adhesion to the resin layer 16 due to the anchoring effect. For example, the low-tack layer 14 of the uneven portion 54 may be formed with an adhesive, and the low-tack layer 14 of the flat portion 56 may be formed with a fluororesin or silicone resin.

[0060] The method for manufacturing the resin-coated member 50 is the same as the low-tackiness layer formation step (S10) and resin layer formation step (S12) of the first embodiment, so a detailed explanation is omitted. If different low-tackiness agents are to be applied to the low-tackiness layer 14 of the uneven portion 54 and the low-tackiness layer 14 of the flat portion 56, the low-tackiness layers 14 can be formed by masking or the like.

[0061] According to the resin-coated member with the above configuration, the effects of the first embodiment can be achieved, and even when there are irregularities on the surface of the member, the peelability and adhesion of the resin layer can be improved in a balanced manner.

[0062] [Fifth Embodiment] Next, a fifth embodiment of this disclosure will be described in detail with reference to the drawings. Figure 8 is a schematic cross-sectional view showing the configuration of the resin-coated member 60. Components similar to those in the above embodiments are denoted by the same reference numerals, and detailed descriptions are omitted. The fifth embodiment differs from the third embodiment mainly in the configuration of member 52.

[0063] The resin-coated member 60 has a surface with irregularities 54 on the surface of the member body 12a. Since the member 52 has the same configuration as the member 52 of the resin-coated member 50 of the fourth embodiment, a detailed explanation is omitted.

[0064] The resin-coated member 60 has a peelable region 32 and a non-peeling region 34. The peelable region 32 is provided between the member body 12a and the resin layer 16 and is formed of a low-tack layer 14. The non-peeling region 34 is provided between the member body 12a and the resin layer 16 and does not include the low-tack layer 14. The non-peeling region 34 is arranged in a grid pattern, and the peelable region 32 is surrounded by the non-peeling region 34. The entire circumference of the peelable region 32 is surrounded by the non-peeling region 34.

[0065] It is preferable that a peel-off region 32 be provided in the uneven portion 54. The peel-off region 32 is composed of a low-tack layer 14 covering the uneven portion 54. The peel-off region 32 may be provided over the entire surface of the uneven portion 54, or only on a part of the uneven portion 54, but it is preferable that it be provided over the entire surface of the uneven portion 54. As described above, the adhesion force of the uneven portion 54 becomes stronger due to the anchoring effect, so the adhesion force can be reduced by providing a peel-off region 32 in the uneven portion 54. It is also preferable that a non-peel-off region 34 be provided in the flat portion 56. This is because the anchoring effect hardly occurs in the flat portion 56, so the adhesion force can be suppressed even without providing a low-tack layer 14. For example, if the flat portion 56 is arranged in a grid pattern and the uneven portion 54 is surrounded by the flat portion 56, it is possible to configure the structure so that the peel-off region 32 corresponds to the uneven portion 54 and the non-peel-off region 34 corresponds to the flat portion 56.

[0066] The method for manufacturing the resin-coated member 60 is the same as the low-tackiness layer formation step and the resin layer formation step in the method for manufacturing the resin-coated member 30 of the third embodiment, so a detailed explanation is omitted.

[0067] According to the resin-coated member with the above configuration, the effects of the third embodiment are achieved, and even when there are irregularities on the surface of the member, the peelability and adhesion of the resin layer can be improved in a balanced manner.

[0068] [Sixth Embodiment] Next, a sixth embodiment of this disclosure will be described in detail with reference to the drawings. Figure 9 is a schematic cross-sectional view showing the configuration of the resin-coated member 70. Components similar to those in the above embodiments are denoted by the same reference numerals, and detailed descriptions are omitted. The sixth embodiment differs from the first embodiment mainly in the configuration of member 72.

[0069] The resin-coated member 70 has a member 72 which is made up of a joint member. The member 72 has a member body 72a which has a plurality of member plates 74 and fastening parts 76 which fasten adjacent member plates 74 together. The fastening method of the fastening parts 76 is not particularly limited, but can be made up of bolt joints, for example. In the resin-coated member 70 shown in Figure 9, the fastening parts 76 are made up of bolt joints.

[0070] The fastening portion 76 is formed by overlapping splice plates 78 on the upper and lower sides of the abutting ends of adjacent member plates 74, with bolts 80 inserted through bolt holes drilled in the overlapping portions of each member plate 74 and each splice plate 78. A washer (not shown) is fitted onto the tip of the bolt 80 protruding from the upper side of the splice plate 78, and a nut 82 is screwed on. In this way, the fastening portion 76 connects the abutting ends of adjacent member plates 74 via the splice plates 78. The arrangement of the flat portions of the member plates 74 and the fastening portion 76 is not particularly limited, but for example, the flat portions of the member plates 74 may be arranged in a grid pattern so that the fastening portion 76 is surrounded by the flat portions of the member plates 74.

[0071] The surface of the member body 72a is covered with a low-tack layer 14. The low-tack layer 14 covers the entire surface of the member body 72a. More specifically, the low-tack layer 14 covers the entire flat portion and fastening portion 76 of the member plate 74. When the resin layer 16 is directly covered with the fastening portion 76, the adhesion force of the resin layer 16 becomes stronger due to the anchoring effect of the fastening portion 76. As a result, when peeling off the resin layer 16, the resin layer 16 may break or rupture, reducing the ease of peeling off the resin layer 16. On the other hand, by providing the low-tack layer 14 on the fastening portion 76, the adhesion force between the fastening portion 76 and the resin layer 16 is reduced, making it easier to peel off the resin layer 16 from the member 72a when peeling it off.

[0072] The low-tack layer 14 of the fastening portion 76 may use the same low-tack as the low-tack layer 14 of the flat portion of the member plate 74, or it may use a different low-tack. By forming the low-tack layer 14 of the fastening portion 76 and the low-tack layer 14 of the flat portion of the member plate 74 with the same low-tack, the productivity of the resin-coated member 70 can be improved. For example, the low-tack layer 14 that covers the flat portion of the member plate 74 and the fastening portion 76 can be formed using an adhesive.

[0073] Furthermore, when the low-tack layer 14 of the fastening portion 76 and the low-tack layer 14 of the flat portion of the member plate 74 are formed with different low-tack materials, it is preferable to use a low-tack material with lower adhesive strength for the low-tack layer 14 of the fastening portion 76 than for the low-tack layer 14 of the flat portion of the member plate 74. This is because, as mentioned above, the fastening portion 76 will have stronger adhesion to the resin layer 16 due to the anchoring effect. For example, the low-tack layer 14 of the flat portion of the member plate 74 may be formed with a fluororesin or silicone resin, and the low-tack layer 14 of the fastening portion 76 may be formed with an adhesive.

[0074] The method for manufacturing the resin-coated member 70 is the same as the low-tack layer formation step (S10) and the resin layer formation step (S12) of the first embodiment, so a detailed explanation is omitted. If different low-tack materials are to be applied to the low-tack layer 14 of the fastening portion 76 and the low-tack layer 14 of the flat portion of the member plate 74, the low-tack layers 14 can be formed by masking or the like.

[0075] According to the resin-coated member with the above configuration, the effects of the first embodiment can be achieved, and even when the member has fastening parts, the peelability and adhesion of the resin layer can be improved in a balanced manner.

[0076] [Seventh Embodiment] Next, a seventh embodiment of this disclosure will be described in detail with reference to the drawings. Figure 10 is a schematic cross-sectional view showing the configuration of the resin-coated member 80. Components similar to those in the above embodiments are denoted by the same reference numerals, and detailed descriptions are omitted. The seventh embodiment differs from the third embodiment mainly in the configuration of member 72.

[0077] The member 72 of the resin-coated member 80 has a member body 72a which comprises a plurality of member plates 74 and fastening portions 76 which fasten adjacent member plates 74 together. Since member 72 has the same configuration as member 72 of the resin-coated member 70 of the sixth embodiment, a detailed explanation is omitted.

[0078] The resin-coated member 80 has a peelable region 32 and a non-peeling region 34. The peelable region 32 is provided between the member body 72a and the resin layer 16 and is formed of a low-tack layer 14. The non-peeling region 34 is provided between the member body 72a and the resin layer 16 and does not include the low-tack layer 14. The non-peeling region 34 is arranged in a grid pattern, and the peelable region 32 is surrounded by the non-peeling region 34.

[0079] The fastening portion 76 may be provided with a peeling region 32. The peeling region 32 is composed of a low-tack layer 14 provided on the fastening portion 76. The peeling region 32 may be provided over the entire surface of the fastening portion 76 or only on a part of the fastening portion 76, but it is preferable that it be provided over the entire surface of the fastening portion 76. As described above, the fastening portion 76 has a stronger adhesion due to the anchoring effect, so the adhesion can be reduced by providing a peeling region 32 on the fastening portion 76. In addition, it is preferable that the flat portion of the member plate 74 be provided with a non-peeling region 34. This is because the anchoring effect hardly occurs in the flat portion of the member plate 74, so the adhesion can be suppressed even without providing a low-tack layer 14. For example, if the flat portions of the member plate 74 are arranged in a grid pattern and the fastening portion 76 is surrounded by the flat portions of the member plate 74, it is possible to configure the fastening portion 76 to have a peeling region 32 and the member plate 74 to have a non-peeling region 34.

[0080] The method for manufacturing the resin-coated member 80 is the same as the low-tackiness layer formation step and the resin layer formation step in the method for manufacturing the resin-coated member 30 of the third embodiment, so a detailed explanation is omitted.

[0081] According to the resin-coated member with the above configuration, the effects of the third embodiment are achieved, and even when the member has fastening parts, the peelability and adhesion of the resin layer can be improved in a balanced manner. [Examples]

[0082] Adhesion evaluation tests were conducted on the low-tack adhesive. First, the test specimens of Examples 1 to 4 will be described. The adhesion evaluation tests were conducted in accordance with the adhesion strength measurement method of JIS Z 0237 (2009). Each test specimen was prepared by applying the low-tack adhesive to the surface of a metal substrate to cover it with a low-tack adhesive layer, and then covering the surface of the low-tack adhesive layer with a resin layer. The metal substrate and resin layer were the same for each test specimen. Steel was used as the metal substrate. The resin layer was formed from transparent polyurea resin.

[0083] Next, the low-tack layer of each test specimen will be described. In the test specimen of Example 1, a low-tack layer was formed using a silicone resin. In the test specimen of Example 2, a low-tack layer was formed using a fluororesin. In the test specimen of Example 3, a low-tack layer was formed using an adhesive made of polyvinyl alcohol resin. In the test specimen of Example 4, a low-tack layer was formed using an adhesive made of vinyl acetate resin. For the solvent of the low-tack layer, an organic solvent was used for the test specimens of Examples 1 and 2, and water was used for the test specimens of Examples 3 and 4.

[0084] Next, the test specimen of Comparative Example 1 will be described. The test specimen of Comparative Example 1 differs from the test specimens of Examples 1 to 4 in that it lacks a low-tack layer, but the other components are the same. More specifically, a resin layer was formed by coating the surface of a metal substrate with a transparent polyurea resin.

[0085] Each test specimen was rectangular in shape, approximately 24 mm wide and 300 mm long. The peel load when removing the resin layer from each test specimen was measured. Figure 11 is a graph showing the results of the adhesion strength evaluation test. In the graph in Figure 11, the horizontal axis represents each test specimen, and the vertical axis represents the peel load, with the peel load of each test specimen shown as a bar graph.

[0086] The peel load of the specimen in Example 1 was 80.00 KN. The peel load of the specimen in Example 2 was 70.60 KN. The peel load of the specimen in Example 3 was 3.14 KN. The peel load of the specimen in Example 4 was 3.14 KN. In contrast, the peel load of the specimen in Comparative Example 1 was 97.30 KN. From these test results, it was found that the specimens in Examples 1 to 4 had smaller peel loads than the specimen in Comparative Example 1. It was found that the specimens in Examples 3 to 4 had even smaller peel loads than the specimens in Examples 1 to 2. Furthermore, it was found that the specimens in Examples 1 to 4 had appropriate peel loads for the adhesion of the resin layer, and that appropriate adhesion force could be obtained.

[0087] From the above, it was found that when a low-tack layer is formed using an adhesive made of polyvinyl alcohol resin, vinyl acetate resin, silicone resin, or fluororesin, the adhesion strength of the resin layer can be reduced compared to when no low-tack layer is formed. It was also found that when a low-tack layer is formed using an adhesive made of polyvinyl alcohol resin or vinyl acetate resin, the adhesion strength of the resin layer can be reduced even further than when a low-tack layer is formed using silicone resin or fluororesin. Furthermore, it was found that even when a low-tack layer is formed using an adhesive made of polyvinyl alcohol resin or vinyl acetate resin, silicone resin, or fluororesin, an appropriate level of adhesion to the resin layer can be obtained.

[0088] These results demonstrate that by forming a low-tack layer using adhesives consisting of polyvinyl alcohol resin, vinyl acetate resin, silicone resin, and fluororesin, it is possible to improve the release properties and adhesion of the resin layer in a balanced manner. [Explanation of symbols]

[0089] 10, 20, 30, 50, 60, 70, 80 Resin-coated members 12, 21, 52, 72 components 14 Low adhesive layer 16 resin layer 32. Peeling area 34 Non-peeling areas 54 Uneven part 74 component plates 76 Fastening part 78 Connection plate 80 volts 82 nuts

Claims

1. A resin-coated member, A member having a main body, A resin layer formed of resin is covered on the surface of the member body, Equipped with, A resin-coated member comprising an adhesive layer formed of an adhesive, provided across the entire surface between the member body and the resin layer, The member has an extended portion that extends around the main body of the member, The extended portion is covered with the resin layer, A resin-coated member that does not include the adhesive layer between the extended portion and the resin layer.

2. A resin-coated member according to claim 1, A resin-coated member having an adhesive layer provided between the extended portion and the resin layer, and formed with an adhesive or adhesive tape.

3. A resin-coated member according to any one of claims 1 to 2, The member is a resin-coated member having an uneven surface on the main body of the member.

4. A resin-coated member according to claim 3, The adhesive layer is a resin coating member provided between the uneven portion and the resin layer.

5. A resin-coated member according to any one of claims 1 to 2, The member is a resin-coated member having a main body which comprises a plurality of member plates and fastening portions which fasten adjacent member plates together.

6. A resin-coated member according to claim 5, The adhesive layer is a resin-coated member provided between the fastening portion and the resin layer.

7. A resin-coated member according to any one of claims 1 to 2, A resin-coated member wherein the adhesion force between the resin layer and the adhesive layer is greater than the adhesion force between the member body and the adhesive layer.

8. A resin-coated member according to any one of claims 1 to 2, The adhesive is a glue, a fluororesin agent, or a silicone resin agent, in the resin-coated member.

9. A resin-coated member according to claim 8, The adhesive is a polyvinyl alcohol resin, a vinyl acetate resin, a polyvinylpyrrolidone resin, or a starch, in the resin-coated member.

10. A resin-coated member according to any one of claims 1 to 2, The resin layer is made of polyurea resin, urethane resin, or polyvinyl chloride resin, and is a resin-coated member.

11. A resin-coated member according to any one of claims 1 to 2, The aforementioned resin layer is a resin-coated member formed of a transparent resin.

12. A resin-coated member according to any one of claims 1 to 2, The aforementioned member is a resin-coated member having a coating film provided on its surface.

Images