Wear-resistant structure and copper-clad plate

Abstract

The invention provides a wear-resistant structure and a copper-clad plate. The wear-resistant structure comprises a substrate and micro-beads, micron-sized micro-pits with openings in the tops are formed in the surface of the substrate, the micro-pits are partially filled with the micro-beads, and part of spheres of the micro-beads are exposed out of the surface of the substrate through the openings of the micro-pits. According to the wear-resistant structure provided by the invention, the micron-sized micro pits with the top openings are formed in the surface of the substrate, the micro pits are partially filled with the micro beads, and partial spheres of the micro beads are exposed out of the surface of the substrate through the openings of the micro pits, so that when friction occurs, the micro beads preferentially make contact with an external object, bear wear and play a sliding role; the friction force is shared and dispersed, and the wear resistance of the substrate is improved; namely, due to the arrangement of the micro pits and the micro beads, when the wear-resistant structure is impacted and rubbed by external force, wear can be better avoided, the integrity of the wear-resistant structure is kept, and the service life of the wear-resistant structure is prolonged.

Description

Technical Field

[0001] The present invention relates to the field of communication technology, and in particular to a wear-resistant structure and a copper-clad plate. Background Art

[0002] In the current market, communications application materials often require frictional sliding operations while also transmitting electrical signals. Currently, various copper-clad substrates, such as epoxy, hydrocarbon, PTFE, PI, LCP, and paper-based substrates, are widely used in applications that carry power or signals. When copper or signal traces are present on the surface of a material, a protective layer, such as solder mask treatment using ink or conformal coating, is often applied to protect the traces from air oxidation, prevent oxidation and corrosion during operation and in harsh environments, and maintain long-term signal stability.

[0003] With the rapid development of the communications sector, high-performance equipment requires constant debugging, often performed remotely at varying angles. This can easily damage the surface of the product due to friction, exposing copper wires to air and leading to oxidation, ultimately causing equipment failure. In applications such as offshore antennas, adjustable-angle antennas, and 5G internal signal conditioning motherboards, confined spaces between devices require the isolation and protection of electronic components. However, existing copper-clad substrates suffer from wear resistance, creating an urgent need for a material with corrosion, wear, and slip resistance to meet these protection requirements. Summary of the Invention

[0004] Aiming at the problem that copper-clad substrates in communication materials in the prior art are easily worn, a wear-resistant structure and a copper-clad substrate are provided.

[0005] The technical solutions adopted by the present invention to solve the above technical problems are as follows: On the one hand, the present invention provides a wear-resistant structure comprising a substrate and microbeads, wherein the surface of the substrate is provided with micron-sized micropits with top openings, the microbeads are partially filled in the micropits, and part of the spheres of the microbeads are exposed to the surface of the substrate through the openings of the micropits.

[0006] Optionally, the pore size of the micropit is 90-120 μm, and the particle size of the microbead is 50-70 μm; and / or the volume of the microbead protruding from the micropit is 1 / 4-1 / 3 of the volume of the microbead.

[0007] Optionally, the microspheres include one or more of hollow glass microspheres or hollow ceramic microspheres; and / or the substrate includes one or more of fluorine-containing resin materials, silicone materials and rubber materials.

[0008] Optionally, it further comprises a coating layer, which is coated on the surface of the microbeads, and the coating layer comprises the following components by weight: The paraffin wax is 5-10 parts, and the microcrystalline wax is 5-15 parts.

[0009] Optionally, a metal foil is further included, the metal foil is located on the surface of the substrate, and an avoidance window is provided on the metal foil, the microbeads and the micropits are provided in the avoidance window, and the microbeads are exposed from the avoidance window.

[0010] Optionally, the method for preparing the wear-resistant structure includes the following operations: The substrate is softened at high temperature, and after softening, the surface of the substrate is sandblasted to form micro pits on the surface of the substrate; Plasma treatment is performed on the surface of the substrate with micro-pits, so that the surface of the micro-pits has negative charges; The microbeads are applied to the surface of the substrate and embedded in the micro-pits, and then pressed at high temperature. After pressing, part of the microbead sphere protrudes from the substrate.

[0011] Optionally, during the sandblasting operation, the sandblasting pressure is 0.5-0.8 MPa; and / or, during the high-temperature softening, the softening temperature is 190-210° C. and the softening time is 40-60 min; and / or, the high-temperature pressing temperature is 180-450° C. and the pressure is 1.5-4.5 MPa.

[0012] Optionally, before the microbead application operation is performed, the microbead surface is coated with paraffin wax and microcrystalline wax to form a coating layer on the microbead surface.

[0013] Optionally, after the microbead application operation and before the high-temperature pressing operation, the method further includes: covering the surface of the substrate with metal foil, coating a coupling agent coating between the metal foil and the substrate, and the thickness of the coupling agent coating is 0.1-2 μm.

[0014] On the other hand, the present invention provides a copper clad laminate comprising the wear-resistant structure or the wear-resistant structure prepared by the method for preparing the wear-resistant structure.

[0015] The beneficial effects of the present invention are: The wear-resistant structure provided in the present application includes a substrate and microbeads. The surface of the substrate is provided with micron-sized micro-pits with top openings. The microbeads are partially filled in the micro-pits, and part of the spheres of the microbeads are exposed to the surface of the substrate through the openings of the micro-pits. When friction occurs, the microbeads preferentially contact external objects and withstand wear, exerting a sliding effect, thereby sharing and dispersing the friction force and improving the wear resistance of the substrate; that is, the setting of the micro-pits and microbeads can better avoid wear when facing external force impact and friction, maintain the integrity of the wear-resistant structure, and help extend the service life of the wear-resistant structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1It is a schematic diagram of the wear-resistant structure provided by the present invention; Figure 2 yes Figure 1 Enlarged view of point A in the middle; Figure 3 Schematic diagram of the microbead structure provided by the present invention; Figure 4 It is a schematic diagram of the substrate structure provided by the present invention; Figure 5 This is a schematic structural diagram of a substrate provided by the present invention with micro-pits; Figure 6 It is a schematic diagram of the structure of the microbeads embedded in the substrate provided by the present invention.

[0017] The reference numerals in the drawings of the specification are as follows: 1. Substrate; 2. Microbeads; 3. Micropits; 4. Coating layer; 5. Metal foil. DETAILED DESCRIPTION

[0018] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0019] In the description of the present invention, it should be understood that the terms "longitudinal", "radial", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended only to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as limiting the present invention. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0020] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0021] Reference Figure 1-6The present invention provides a wear-resistant structure, including a substrate 1 and micro-beads 2. The surface of the substrate 1 is provided with micron-sized micro-pits 3 with top openings. The micro-beads 2 are partially filled in the micro-pits 3, and part of the spheres of the micro-beads 2 are exposed on the surface of the substrate 1 through the openings of the micro-pits 3.

[0022] Specifically, the wear-resistant structure of the present application is composed of a base 1 and microbeads 2. The surface of the base 1 is provided with micron-sized micro-pits 3 with top openings, in which the microbeads 2 are partially filled and part of the spheres are exposed on the surface of the base 1. This structure allows the microbeads 2 to preferentially contact external objects and withstand wear and play a sliding role when friction occurs, thereby sharing and dispersing the friction force, thereby improving the wear resistance of the base 1. At the same time, when facing external force impact and friction, the setting of the micro-pits 3 and microbeads 2 can better avoid wear, maintain the integrity of the wear-resistant structure, and help extend the service life of the wear-resistant structure.

[0023] Reference Figure 3 and Figure 5 In one embodiment, the pore size of the micropit 3 is 90-120 μm, and the particle size of the microbead 2 is 50-70 μm; and / or the volume of the microbead 2 protruding from the micropit 3 is 1 / 4-1 / 3 of the volume of the microbead 2.

[0024] Specifically, in this embodiment, the aperture of the micropit 3 is set to 90-120 μm, the particle size of the microbead 2 is 50-70 μm, and the volume of the microbead 2 protruding from the micropit 3 is 1 / 4-1 / 3 of its own volume. The setting of these size parameters can form a good matching relationship between the microbead 2 and the micropit 3, ensuring that the microbead 2 is firmly embedded in the micropit 3 and can effectively play the role of preferential contact, bearing wear and sliding dispersion friction during friction, further improving the wear resistance of the substrate 1, better maintaining the integrity of the wear-resistant structure, and ensuring the service life of the wear-resistant structure.

[0025] The pore size of the micropits 3 may be 90 μm, 100 μm, 110 μm or 120 μm; the particle size of the microbeads 2 may be 50 μm, 60 μm or 70 μm.

[0026] In one embodiment, the microspheres 2 include one or more of hollow glass microspheres or hollow ceramic microspheres; and / or the substrate 1 includes one or more of fluorine-containing resin materials, silicone materials, and rubber materials.

[0027] Specifically, hollow glass microspheres are tiny hollow spherical powders made of inorganic materials. They have the advantages of light weight, large volume, low thermal conductivity, high compressive strength, good dispersibility, fluidity and stability. Hollow ceramic microspheres are tiny hollow spheres with a particle size generally ranging from a few microns to several hundred microns. Their shell is made of ceramic material with high hardness and strength, and their interior is a hollow structure. In this embodiment, the microspheres 2 are selected from one or more hollow glass microspheres or hollow ceramic microspheres, which have the characteristics of light weight and high strength, and can reduce their own wear while sharing the friction force; The base 1 is made of one or more of fluororesin materials, silicone materials and rubber materials. These materials themselves have good flexibility, wear resistance and chemical stability. The combination of microbeads 2 and base 1 can make the wear-resistant structure have excellent wear resistance while also having good flexibility and chemical tolerance, adapting to a variety of complex usage environments, and effectively improving the comprehensive performance and application range of the wear-resistant structure.

[0028] Reference Figure 3 In one embodiment, it further includes a coating layer 4, wherein the coating layer 4 is coated on the surface of the microbead 2, and the coating layer 4 includes the following weight components; The paraffin wax is 5-10 parts, and the microcrystalline wax is 5-15 parts.

[0029] Specifically, in this embodiment, the wear-resistant structure is composed of a coating layer 4 composed of 5-10 parts of paraffin wax and 5-15 parts of microcrystalline wax, which is coated on the surface of the microbeads 2. The paraffin wax and microcrystalline wax can form a protective film with good lubricity on the surface of the microbeads 2. During the friction process, the protective film can reduce the friction coefficient between the microbeads 2 and external objects, reduce wear, and at the same time enhance the wear resistance of the microbeads 2, further improving the overall wear resistance of the wear-resistant structure.

[0030] Reference Figure 1-2 In one embodiment, a metal foil 5 is further included, wherein the metal foil 5 is located on the surface of the substrate 1, and an avoidance window is provided on the metal foil 5, the microbeads 2 and the micropits 3 are provided in the avoidance window, and the microbeads 2 are exposed from the avoidance window.

[0031] Specifically, the wear-resistant structure provided in the present application comprises a plurality of micro-beads 2 and a plurality of micro-pits 3, wherein the plurality of micro-beads 2 and the plurality of micro-pits 3 are respectively placed in the avoidance windows; The wear-resistant structure introduces a metal foil 5 to cover the surface of the substrate 1, and the metal foil 5 is provided with the avoidance window at the position corresponding to the micro-pit 3. The microbeads 2 can be exposed from the area of the avoidance window. The metal foil 5 can enhance the overall strength and rigidity of the wear-resistant structure and resist external force impact; at the same time, the setting of the avoidance window is conducive to ensuring that the multiple microbeads 2 can normally play the role of contacting the outside world, bearing wear and dispersing friction. The combination of the two enables the wear-resistant structure to have high strength while maintaining good wear resistance, and is suitable for more scenarios with higher requirements for strength and wear resistance.

[0032] In one embodiment, the method for preparing the wear-resistant structure includes the following operations: Softening the substrate 1 at high temperature, and then performing sandblasting on the surface of the substrate 1 to form micro-pits 3 on the surface of the substrate 1; Plasma treatment is performed on the surface of the substrate 1 where the micro-pits 3 are formed, so that the surface of the micro-pits 3 has negative charges; The microbeads 2 are applied to the surface of the substrate 1 and embedded in the micropits 3 , and then pressed at high temperature. After pressing, part of the sphere of the microbeads 2 protrudes from the substrate 1 .

[0033] Specifically, the method for preparing the wear-resistant structure includes the following specific operations: Fix the softened substrate 1 material on a sandblasting workbench, adjust the distance, angle, and blasting pressure between the sandblasting gun and the surface of the substrate 1 material, turn on the sandblasting equipment, spray the sand material onto the surface of the substrate 1 material at high speed, and continue sandblasting until evenly distributed micro-pits 3 are formed on the surface; after the sandblasting is completed, observe the size, depth, and distribution of the micro-pits 3. If there are problems such as the micro-pits 3 being too large, too small, or too shallow, re-blasting is required or the sandblasting parameters are adjusted and sandblasted again; Plasma ionization is performed. The substrate 1 material with the micro-pits 3 is placed in a vacuum chamber of a plasma treatment device. The chamber is closed and evacuated to a suitable pressure to excite the inorganic gas to form a plasma. The particles in the plasma undergo a series of physical and chemical reactions with the surface of the micro-pits 3, causing the surface of the micro-pits 3 to have a negative charge. Select microbeads (such as 50-70 μm ceramic or hollow glass microbeads) and evenly sputter them onto the surface of the substrate 1 with negatively charged micropits 3 through vacuum magnetron sputtering. Due to the certain adsorption force between the negative charge on the surface of the micropits 3 and the microbeads 2, the microbeads 2 will initially adhere to the micropits 3. After applying the microbeads 2 to the micropits 3, pressing is performed. After pressing is completed, the microbeads 2 should be firmly embedded in the micropits 3 and part of the spheres should protrude evenly from the surface of the substrate 1. The volume of the microbeads 2 protruding from the micropits 3 is 1 / 4-1 / 3 of their own volume. If the microbeads 2 are not firmly embedded or the protruding height does not meet the relevant setting requirements, the pressing parameters can be adjusted and pressed again.

[0034] Specifically, the sand material used in the sandblasting operation can be corundum, thereby preparing the micro-pits 3 on the substrate 1.

[0035] Specifically, in the present application, the micro-beads 2 are sputtered and filled into the micro-pits 3 through vacuum magnetron sputtering operation, and at the same time, with the help of the adsorption effect of plasma, it is ensured that the micro-beads 2 can be filled in the micro-pits 3 more firmly.

[0036] During the plasma ionization process, plasma treatment technology is used to activate the micropits 3 with ions. Inorganic gases are excited into plasma, causing gaseous substances to adsorb and react on the surface of the micropits 3, enhancing the surface activity of the micropits 3 and improving the binding force with the microbeads 2. Furthermore, the high energy of plasma reacts with various particles, organic matter, oxides, and residual abrasive particles on the surface of the micropits 3 during the treatment process. These impurities are removed through physical bombardment and chemical reactions, thereby achieving the purpose of cleaning the micropits 3. Furthermore, the energy of the plasma can also etch or repair some uneven areas on the surface of the micropits 3, making the surface of the micropits 3 smoother and creating better conditions for the subsequent filling and attachment of the microbeads 2.

[0037] The static electricity (positive charge) generated during the friction of the microbeads 2 and the negatively charged micropits 3 after plasma treatment are attracted to each other, so that the microbeads 2 will not fall off. Moreover, because the microbeads 2 are hard and smooth, they can complement the forces of the micropits 3 on the substrate 1, allowing them to roll or slide in contact with external objects.

[0038] In one embodiment, during the sandblasting operation, the sandblasting pressure is 0.5-0.8 MPa; and / or, during the high-temperature softening, the softening temperature is 190-210° C. and the softening time is 40-60 min; and / or, during the high-temperature pressing, the temperature is 180-450° C. and the pressure is 1.5-4.5 MPa.

[0039] Specifically, during the sandblasting operation, the sandblasting pressure is controlled at 0.5-0.8 MPa. Such a pressure can ensure that the diamond grains impact the surface of the substrate 1 at an appropriate speed, thereby ensuring the effective formation of the micro-pits 3 without damaging the structure of the substrate 1 due to excessive pressure.

[0040] In the high-temperature softening stage, the temperature is set at 190-210°C and the time is controlled to 40-60 minutes. Under this condition, the substrate 1 material can be fully softened and the internal debugging chemical reagents can be fully volatilized, while avoiding excessive softening and damage to the material performance. In the high-temperature pressing stage, the temperature range is 180-450°C and the pressure is 1.5-4.5MPa. Through such temperature and pressure settings, the micro-beads 2 filled in the micro-pits 3 can be tightly combined with the substrate 1, ensuring that the final wear-resistant structure has good performance.

[0041] In one embodiment, before applying the microbeads 2 , the surfaces of the microbeads 2 are coated with paraffin wax and microcrystalline wax to form a coating layer 4 on the surfaces of the microbeads 2 .

[0042] Specifically, before the microbeads 2 are applied to the micropits 3 of the substrate 1, they are coated with paraffin wax and microcrystalline wax. After the paraffin wax and microcrystalline wax are melted and mixed in a ratio of 5-10 parts and 5-15 parts, they are evenly coated on the surface of the microbeads 2 to form a coating layer 4. This coating layer 4 plays a significant role in subsequent processes. When the microbeads 2 come into contact with the outside world, it can use its good lubricity to reduce the friction coefficient between the microbeads 2 and other objects, reducing wear. At the same time, during high-temperature pressing, it can enhance the bonding force between the microbeads 2 and the substrate 1, allowing the microbeads 2 to be more firmly embedded in the micropits 3, further improving the wear resistance and stability of the wear-resistant structure as a whole, and helping to extend the service life of the wear-resistant structure.

[0043] In one embodiment, after applying the microbeads 2 and before high-temperature pressing, the process further includes: covering the surface of the substrate 1 with a metal foil 5, and coating a coupling agent coating between the metal foil 5 and the substrate 1, wherein the thickness of the coupling agent coating is 0.1-2 μm.

[0044] Specifically, after the microbeads 2 are applied to the surface of the substrate 1 and before high-temperature pressing, the surface of the substrate 1 will be covered with a metal foil 5. In order to enhance the bonding force between the metal foil 5 and the substrate 1, a coupling agent coating with a thickness of 0.1-2 μm is coated between the two. The coupling agent molecules can react chemically with the metal foil 5 and the substrate 1 respectively to form chemical bonds, thereby enhancing the bonding strength between the substrate 1 and the metal foil 5. The metal foil 5 can enhance the strength and rigidity of the wear-resistant structure and improve its ability to resist external impact. The coupling agent coating ensures that the metal foil 5 is firmly bonded to the substrate 1, avoiding separation during use, further optimizing the performance of the wear-resistant structure, so that it has better mechanical properties and stability while having good wear resistance.

[0045] The thickness of the coupling agent coating layer may be 0.1 μm, 0.15 μm or 0.2 μm.

[0046] On the other hand, the present invention provides a copper clad laminate comprising the wear-resistant structure or the wear-resistant structure prepared by the method for preparing the wear-resistant structure.

[0047] Specifically, the copper clad laminate provided by the present invention includes the wear-resistant structure provided in this application, in which the surface of the substrate 1 is provided with micron-sized micro-pits 3 with top openings, and the microbeads 2 are partially filled in the micro-pits 3, and part of the spheres of the microbeads 2 are exposed to the surface of the substrate 1 through the openings of the micro-pits 3. When friction occurs, the microbeads 2 preferentially contact external objects and withstand wear, exert a sliding effect, and thus share and disperse the friction force, thereby improving the wear resistance of the substrate 1; that is, the setting of the micropits 3 and the microbeads 2 can better avoid wear, maintain the integrity of the wear-resistant structure, and help extend the service life of the wear-resistant structure. When the wear-resistant structure is applied to the copper clad laminate, its wear-resistant properties help solve the problem of easy wear of the copper clad substrate in communication materials, thereby meeting the demand of communication materials for long-term and stable use of the copper clad laminate.

[0048] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A wear-resistant structure, characterized in that: The invention comprises a substrate (1) and microbeads (2), wherein the surface of the substrate (1) is provided with micron-sized micropits (3) with top openings, the microbeads (2) are partially filled in the micropits (3), and part of the spheres of the microbeads (2) are exposed on the surface of the substrate (1) through the openings of the micropits (3).

2. The wear-resistant structure according to claim 1, characterized in that: The pore size of the micropit (3) is 90-120 μm, and the particle size of the microbead (2) is 50-70 μm; and / or the volume of the microbead (2) protruding from the micropit (3) is 1 / 4-1 / 3 of the volume of the microbead (2).

3. The wear-resistant structure according to claim 1, characterized in that: The microspheres (2) include one or more of hollow glass microspheres or hollow ceramic microspheres; and / or the substrate (1) includes one or more of fluorine-containing resin materials, silicone materials, and rubber materials.

4. The wear-resistant structure according to claim 1, characterized in that: It also includes a coating layer (4), which is coated on the surface of the microbead (2), and the coating layer (4) includes the following components by weight: The paraffin wax is 5-10 parts, and the microcrystalline wax is 5-15 parts.

5. The wear-resistant structure according to claim 1, characterized in that: It also includes a metal foil (5), the metal foil (5) is located on the surface of the substrate (1), and a avoidance window is provided on the metal foil (5), the microbeads (2) and the micropits (3) are arranged in the avoidance window, and the microbeads (2) are exposed from the avoidance window.

6. The method for preparing a wear-resistant structure according to any one of claims 1 to 5, characterized in that: The following operations are included: Softening the substrate (1) at high temperature, and after softening, sandblasting the surface of the substrate (1) to form micro-pits (3) on the surface of the substrate (1); Plasma treatment is performed on the surface of the substrate (1) on which the micro-pits (3) are formed, so that the surface of the micro-pits (3) has a negative charge; The microbeads (2) are applied to the surface of the substrate (1) and embedded in the micropits (3), and then pressed at high temperature. After pressing, part of the sphere of the microbeads (2) protrudes from the substrate (1).

7. The method for preparing a wear-resistant structure according to claim 6, characterized in that: During the sandblasting operation, the sandblasting pressure is 0.5-0.8 MPa; and / or, during the high-temperature softening, the softening temperature is 190-210° C. and the softening time is 40-60 min; and / or, during the high-temperature pressing, the temperature is 180-450° C. and the pressure is 1.5-4.5 MPa.

8. The method for preparing a wear-resistant structure according to claim 6, characterized in that: Before the microbeads (2) are applied, the surfaces of the microbeads (2) are coated with paraffin wax and microcrystalline wax to form a coating layer (4) on the surfaces of the microbeads (2).

9. The method for preparing a wear-resistant structure according to claim 6, wherein: After the microbeads (2) are applied and before high-temperature pressing, the method further comprises: covering the surface of the substrate (1) with a metal foil (5), and coating a coupling agent coating between the metal foil (5) and the substrate (1), wherein the thickness of the coupling agent coating is 0.1-2 μm.

10. A copper clad laminate, characterized in that: The wear-resistant structure comprises the wear-resistant structure according to any one of claims 1 to 5 or the wear-resistant structure prepared by the preparation method of the wear-resistant structure according to any one of claims 6 to 9.

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