A conductive coating with scratch resistance

Abstract

The utility model relates to the technical field of functional coatings, and discloses a conductive coating with anti-scratch performance, wherein the conductive coating is coated on the surface of a PCB board, the conductive coating comprises a conductive layer, a substrate base material, an inner protective layer, an outer protective layer and a scratch-resistant coating, the inner protective layer is coated on the substrate base material, the outer protective layer is coated on the inner protective layer, the scratch-resistant coating is arranged on the outer protective layer, the outer protective layer comprises a first wear-resistant layer and a second wear-resistant layer, and a protruding structure is formed on the surface of the conductive layer by arranging protruding particles, thereby effectively improving the scratch resistance of the conductive layer, avoiding damage to the conductive layer by the force of the external environment, and improving the service life of the conductive layer, ensuring the conductive performance of the conductive coating, ensuring the beauty of the conductive coating, reducing the possibility of scratches and cracks on the conductive coating, and having high practicality and high safety.

Description

Technical Field

[0001] The utility model relates to the technical field of functional coatings, in particular to a conductive coating with anti-scratch performance. Background Art

[0002] The electrical coating includes a metal conductive layer formed by various coating methods, conductive tape or other special coating materials, such as conductive paste used to fill shielding gaps. It can provide excellent static conductive properties and is a protective energy absorption layer.

[0003] Some existing electronic products usually have a conductive coating on their surface to ensure the normal use of the electronic products and increase their service life. However, in actual use, the surface of the electronic products cannot avoid contact with external objects, which may cause the conductive coating to be scratched when in contact with external objects, resulting in cracks in the conductive coating. This is not only not conducive to maintaining the conductive properties, but also affects the appearance of the conductive coating, making its surface no longer smooth, less safe, and less practical. In view of this, we propose a conductive coating with scratch resistance to solve the above problems. Utility Model Content

[0004] 1. Technical issues to be resolved

[0005] In view of the deficiencies of the prior art, the utility model provides a conductive coating with anti-scratch performance, which solves the problem that some existing conductive coatings may be scratched and cracked if they are not reliable enough.

[0006] (II) Technical solution

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a conductive coating with anti-scratch performance, including a conductive layer coated on the surface of a PCB board, the conductive coating including a conductive layer, a substrate base material, an inner protective layer, an outer protective layer and a scratch-resistant coating, the inner protective layer is coated on the substrate base material, the outer protective layer is coated on the inner protective layer, the scratch-resistant coating is arranged on the outer protective layer, and the outer protective layer includes a first wear-resistant layer and a second wear-resistant layer.

[0008] Preferably, the first wear-resistant layer is coated on the inner protective layer.

[0009] Preferably, the second wear-resistant layer is coated on the first wear-resistant layer.

[0010] Preferably, the scratch-resistant coating comprises raised particles, and the raised particles are arranged on the second wear-resistant layer.

[0011] Preferably, the inner protective layer comprises a polyurethane coating and a second conductive layer, and the outer protective layer is coated on the polyurethane coating.

[0012] Preferably, the polyurethane coating is coated on the second conductive layer.

[0013] Preferably, the second conductive layer is disposed on a substrate base material.

[0014] Preferably, a first bonding layer is provided between the outer protective layer and the scratch-resistant coating, a second bonding layer is provided between the inner protective layer and the outer protective layer, and a third bonding layer is provided between the substrate and the inner protective layer.

[0015] (III) Beneficial effects

[0016] Compared with the prior art, the utility model provides a conductive coating with anti-scratch performance, which has the following beneficial effects:

[0017] 1. The conductive coating with anti-scratch performance forms a protruding structure on the surface of the conductive layer 1 by setting protruding particles, which effectively improves the anti-scratch performance of the conductive layer 1, avoids damage to the conductive layer 1 by the force of the external environment, and increases the service life of the conductive layer 1. The conductive performance of the conductive coating is guaranteed, the appearance of the conductive coating is guaranteed, and the possibility of scratches and cracks on the conductive coating is reduced. The practicality is high and the safety is high.

[0018] 2. The conductive coating with anti-scratch performance can effectively resist the erosion of various chemical substances such as water, oxidants in the atmosphere, oxygen, carbon dioxide, etc. through the arrangement of the first wear-resistant layer and the second wear-resistant layer. At the same time, it has excellent heat resistance and can be used for a long time in a high temperature environment. It is not easy to be thermally decomposed. Its water absorption is relatively low, and its performance is stable in a humid environment. It is not easy to hydrolyze and crack, which greatly improves the service life and wear resistance of the coating. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the structure of a conductive coating with anti-scratch performance according to the utility model;

[0020] Figure 2 It is a schematic diagram of the structure of the conductive layer of the utility model;

[0021] Figure 3 It is a plan view of the outer protective layer of the utility model;

[0022] Figure 4 It is a plan view of the inner protective layer of the utility model;

[0023] Figure 5 It is a plan view of the conductive layer of the utility model.

[0024] In the figure: 1. third bonding layer; 2. conductive layer one; 3. substrate base material; 4. inner protective layer; 5. outer protective layer; 6. scratch-resistant coating; 7. raised particles; 8. first bonding layer; 9. first wear-resistant layer; 10. second wear-resistant layer; 11. polyurethane coating; 12. conductive layer two; 13. second bonding layer. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] See also Figure 1-Figure 5 The utility model provides a technical solution: a conductive coating with anti-scratch performance, the conductive coating is coated on the surface of the PCB board, the conductive coating includes a conductive layer 2, a substrate 3, an inner protective layer 4, an outer protective layer 5 and a scratch-resistant coating 6, the inner protective layer 4 is coated on the substrate 3, the outer protective layer 5 is coated on the inner protective layer 4, the scratch-resistant coating 6 is arranged on the outer protective layer 5, and the outer protective layer 5 includes a first wear-resistant layer 9 and a second wear-resistant layer 10.

[0027] Furthermore, the first wear-resistant layer 9 is coated on the inner protective layer 4. The first wear-resistant layer 9 is an oily polyester resin. The oily polyurethane resin has good corrosion resistance and can effectively resist the erosion of various chemical substances such as water, oxidants in the atmosphere, oxygen, carbon dioxide, etc. At the same time, it has excellent heat resistance and can be used for a long time in a high temperature environment. It is not easy to be thermally decomposed, and its water absorption is relatively low. In a humid environment, its performance is stable, and it is not easy to hydrolyze and crack, which greatly improves the service life and wear resistance of the coating.

[0028] Furthermore, the second wear-resistant layer 10 is coated on the first wear-resistant layer 9. The second wear-resistant layer 10 is an oily curing agent. The curing agent can shorten the drying time of the coating, and also make the coating stronger, increase the hardness and durability of the coating, etc.

[0029] Furthermore, the scratch-resistant coating 6 includes raised particles 7, and the raised particles 7 are arranged on the second wear-resistant layer 10. The setting of the raised particles 7 forms a raised structure on the surface of the conductive layer 2, which effectively improves the scratch resistance of the conductive layer 2, avoids damage to the conductive layer 2 by the force of the external environment, and improves the service life of the conductive layer 2, with high practicality.

[0030] Furthermore, the inner protective layer 4 includes a polyurethane coating 11 and a conductive layer 12 , and the outer protective layer 5 is coated on the polyurethane coating 11 .

[0031] Furthermore, the polyurethane coating 11 is specifically a water-based polyurethane coating and carbon black. The filler of the water-based polyurethane coating contains carbon black, which ensures the conductivity of the polyurethane coating 11.

[0032] Furthermore, the polyurethane coating 11 is coated on the conductive layer 12, and the conductive layer 12 is specifically copper foil. The copper foil is a cathodic electrolytic material made of copper and a certain proportion of other metals. The copper foil has a low surface oxygen characteristic and can be attached to various different substrates, such as metals, insulating materials, etc., and can also be used for electromagnetic shielding and anti-static. The conductive copper foil is placed on the substrate surface and combined with the metal substrate. It has excellent conductivity and provides electromagnetic shielding effect. By attaching copper foil on the surface of the polyurethane coating 11, the conductivity of the coating can be improved, and it is highly practical.

[0033] Furthermore, the second conductive layer 12 is disposed on the substrate base material 3 .

[0034] Furthermore, a first bonding layer 8 is provided between the outer protective layer 5 and the scratch-resistant coating 6. The provision of the first bonding layer 8 effectively improves the bonding force between the outer protective layer 5 and the scratch-resistant coating 6, thereby ensuring the strength of the connection.

[0035] Furthermore, a second adhesive layer 13 is provided between the inner protective layer 4 and the outer protective layer 5 . The provision of the second adhesive layer 13 further improves the bonding strength between the inner protective layer 4 and the outer protective layer 5 , thereby ensuring the stability between the inner protective layer 4 and the outer protective layer 5 .

[0036] Furthermore, a third adhesive layer 1 is provided between the substrate base material 3 and the inner protective layer 4 , and the provision of the third adhesive layer 1 improves the stability of the connection between the substrate base material 3 and the inner protective layer 4 .

[0037] In the above embodiments, the coating methods of each coating layer include: rod coating, roller coating, spray coating, and spin coating.

[0038] In the above embodiments, the electronic product may also be other electronic products such as a mobile phone and a computer.

[0039] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A conductive coating with anti-scratch performance, the conductive coating is applied to the surface of a PCB board, characterized in that: The conductive coating comprises a conductive layer (2), a substrate (3), an inner protective layer (4), an outer protective layer (5) and a scratch-resistant coating (6); the inner protective layer (4) is coated on the substrate (3); the outer protective layer (5) is coated on the inner protective layer (4); the scratch-resistant coating (6) is arranged on the outer protective layer (5); the outer protective layer (5) comprises a first wear-resistant layer (9) and a second wear-resistant layer (10); the scratch-resistant coating (6) comprises protruding particles (7); and the protruding particles (7) are arranged on the second wear-resistant layer (10).

2. The conductive coating with anti-scratch performance according to claim 1, characterized in that: The first wear-resistant layer (9) is coated on the inner protective layer (4).

3. The conductive coating with anti-scratch performance according to claim 2, characterized in that: The second wear-resistant layer (10) is coated on the first wear-resistant layer (9).

4. The conductive coating with anti-scratch performance according to claim 2, characterized in that: The inner protective layer (4) comprises a polyurethane coating (11) and a second conductive layer (12), and the outer protective layer (5) is coated on the polyurethane coating (11).

5. The conductive coating with anti-scratch performance according to claim 4, characterized in that: The polyurethane coating (11) is coated on the second conductive layer (12).

6. The conductive coating with anti-scratch performance according to claim 5, characterized in that: The second conductive layer (12) is arranged on the substrate base material (3).

7. The conductive coating with anti-scratch performance according to claim 6, characterized in that: A first bonding layer (8) is provided between the outer protective layer (5) and the scratch-resistant coating (6), a second bonding layer (13) is provided between the inner protective layer (4) and the outer protective layer (5), and a third bonding layer (1) is provided between the substrate (3) and the inner protective layer (4).

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