4J36 surface treatment process for flexible screen metal mask backboard foil

Abstract

The invention discloses a 4J36 surface treatment process for a flexible screen metal mask plate back plate foil, which comprises the following specific steps: S1, pretreatment: cleaning a 4J36 foil to remove surface oil stain; s2, electroplating treatment is conducted, specifically, electroplating is conducted on the surface of the pretreated 4J36 foil; s3, chemical polishing treatment is conducted, specifically, the electroplated 4J36 foil is subjected to chemical polishing treatment; s4, the plasma generator is started, and active particles in plasma and the surface of the 4J36 foil are subjected to physical and chemical reactions; s5, the surface of the 4J36 foil subjected to plasma activation treatment is coated with a hydrophobic and oleophobic coating; s6, hot rolling treatment; s7, shot blasting and sanding treatment; according to the 4J36 foil material processing method, each step from pretreatment to coating treatment to hot rolling and follow-up treatment aims to reduce the occurrence conditions of oxidation reaction and enhance the protection performance of the material, so that the oxidation resistance of the overall structure of the 4J36 foil material is improved, and internal oxidation of the 4J36 foil material in the processing process is avoided.

Description

Technical Field

[0001] The invention belongs to the technical field of 4J36 foil surface treatment, and in particular relates to a 4J36 surface treatment process for a flexible screen metal mask backplane foil. Background Art

[0002] Against the backdrop of the rapid development of flexible display technology, metal mask plates are key components in the manufacture of high-end display screens such as 0LEDs. Their material selection and surface treatment process are directly related to the performance and life of the product. 4J36 material, with its excellent low expansion coefficient, good processing performance and corrosion resistance, has become an ideal material for making high-precision metal mask plates.

[0003] During the hot rolling process, 4J36 foil needs to be exposed to a high temperature environment to achieve plastic deformation and densification of the material. However, the high temperature environment accelerates the reaction between the material surface and oxygen in the air, resulting in the rapid generation of oxides. Due to the limited antioxidant capacity of 4J36, these oxides will not only form a loose oxide scale on the surface of the material, but may also be pressed into the interior of the material as the hot rolling process proceeds, forming the so-called "internal oxidation".

[0004] If the surface oxide is not effectively removed or controlled, it will directly affect the subsequent cold rolling process. The presence of the oxide layer will increase the friction during the cold rolling process, causing increased wear of the cold rolling rollers and reducing the cold rolling efficiency. At the same time, after the oxide particles are pressed into the material, tiny crack sources or defects will be formed during the cold rolling process. These defects will gradually expand during subsequent processing and use, seriously affecting the mechanical properties and reliability of the product. Summary of the invention

[0005] The purpose of the present invention is to solve the problem that the oxidation resistance of 4J36 foil is weak. If the surface oxide is not effectively removed or controlled, it will directly affect the subsequent cold rolling process. The presence of the oxide layer will increase the friction during the cold rolling process, resulting in increased wear of the cold rolling roller and reduced cold rolling efficiency. At the same time, after the oxide particles are pressed into the interior of the material, tiny crack sources or defects will be formed during the cold rolling process. These defects will gradually expand during subsequent processing and use, seriously affecting the mechanical properties and reliability of the product. A 4J36 surface treatment process for a flexible screen metal mask backplane foil is proposed.

[0006] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a 4J36 surface treatment process for a flexible screen metal mask backplane foil, the following specific steps:

[0007] S1: Pretreatment, cleaning the 4J36 foil to remove surface oil, impurities and oxide layer, ensuring that the surface of the 4J36 foil is clean and scratch-free; and drying the cleaned foil to prepare for subsequent surface treatment;

[0008] S2: electroplating treatment, electroplating is performed on the surface of the pretreated 4J36 foil, and the thickness of the electroplating layer is controlled between 5-10 microns;

[0009] S3: Chemical polishing treatment, chemical polishing treatment is performed on the 4J36 foil after electroplating, and tiny surface defects are removed by chemical reaction to make the surface smoother and flatter; the surface roughness of the 4J36 foil after treatment is reduced to Ra0.1-0.2 microns;

[0010] S4: Plasma activation treatment, placing the cleaned 4J36 foil into a plasma treatment chamber, starting a plasma generator, ionizing the gas to form plasma, and allowing active particles in the plasma to physically and chemically react with the surface of the 4J36 foil;

[0011] S5: coating treatment, coating a layer of hydrophobic and oleophobic coating on the surface of the 4J36 foil after the plasma activation treatment;

[0012] S6: hot rolling treatment, nitrogen protection is performed on the 4J36 foil, and hot rolling is performed on the foil;

[0013] S7: Shot blasting and sand grinding, the 4J36 foil after hot rolling is shot blasted and sanded to remove surface particles;

[0014] S8: Inspection and packaging: quality inspection is performed on the processed 4J36 foil to ensure that the performance meets the design requirements.

[0015] As a further description of the above technical solution:

[0016] The plasma source in S4 is radio frequency (RF) plasma, direct current (DC) plasma or microwave plasma.

[0017] As a further description of the above technical solution:

[0018] The hydrophobic and oleophobic coating in S5 is polytetrafluoroethylene (PTFE) or a silane coupling agent.

[0019] As a further description of the above technical solution:

[0020] The step S6 may also be performed in a vacuum.

[0021] As a further description of the above technical solution:

[0022] The cleaning method used in S1 is ultrasonic cleaning or chemical cleaning, and the cleaning time is 5-15 minutes.

[0023] As a further description of the above technical solution:

[0024] The power of the plasma generator is 100-500w.

[0025] As a further description of the above technical solution:

[0026] The hot rolling temperature in S6 is 700-1200°C.

[0027] As a further description of the above technical solution:

[0028] In the S7, the shot blasting speed is 10-30 m / s, and the sanding particle size is 80-400 meshes.

[0029] As a further description of the above technical solution:

[0030] A dephosphorization step can also be added during the hot rolling process to remove oxide particles attached to the surface of the material and reduce the amount of pressure.

[0031] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0032] 1. In the present invention, the surface of the 4J36 foil is thoroughly cleaned in the pretreatment stage to remove oil, impurities and oxide layer, and then the 4J36 foil is electroplated to enhance the mechanical properties and corrosion resistance of the 4J36 foil. At the same time, it also acts as a barrier to effectively isolate the substrate from direct contact with the external environment. The thickness of the electroplating layer is controlled between 5 and 10 microns, which not only ensures sufficient protection effect, but also avoids stress concentration and increased processing difficulty caused by excessive thickness. Then, chemical polishing is performed to remove tiny defects and rough spots on the surface of the electroplating layer and the substrate through chemical reaction, making the surface smoother and flatter, and reducing the surface roughness to Ra 0.1-0.2 microns, it also eliminates potential active points of oxidation reactions, reduces the attachment and growth space of oxides, and finally uses plasma activation treatment to bombard the material surface with high-energy ions, triggering physical and chemical reactions to form a highly active surface layer. This active layer not only enhances the bonding between the coating and the substrate, but also may improve the material's antioxidant properties by changing the surface chemical composition and structure. A hydrophobic and oleophobic coating is coated on the surface of the 4J36 foil after plasma activation treatment to form a solid protective barrier. This structure, from pretreatment to coating treatment, to hot rolling and subsequent treatment, is designed to reduce the conditions for the occurrence of oxidation reactions and enhance the material's protective properties, thereby improving the antioxidant ability of the overall structure of the 4J36 foil and avoiding internal oxidation during processing.

[0033] 2. In the present invention, the corrosion resistance, surface hardness, flatness and oxidation resistance of 4J36 foil are significantly improved through multi-step treatment such as electroplating, chemical polishing, plasma activation and coating treatment. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0035] Figure 1 This is a step diagram of Example 1 of a 4J36 surface treatment process for a flexible screen metal mask backplane foil.

[0036] Figure 2 This is a step diagram of Example 2 of a 4J36 surface treatment process for a flexible screen metal mask backplane foil. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0039] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0041] In the description of the embodiments of the present invention, it should be noted that the terms "upper", "inner", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, or are directions or positional relationships in which the inventive product is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0042] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0043] Embodiment 1

[0044] See also Figure 1 The present invention provides a technical solution: a flexible screen metal mask backplane foil

[0045] The 4J36 surface treatment process used includes the following specific steps:

[0046] S1: Pretreatment, cleaning the 4J36 foil to remove surface oil, impurities and oxide layer, ensuring that the surface of the 4J36 foil is clean and scratch-free; and drying the cleaned foil to prepare for subsequent surface treatment;

[0047] S2: electroplating treatment, electroplating is performed on the surface of the pretreated 4J36 foil, and the thickness of the electroplating layer is controlled between 5-10 microns; a uniform and dense plating layer is formed, which significantly improves the corrosion resistance and surface hardness of the foil and effectively prevents oxidation and corrosion.

[0048] S3: Chemical polishing treatment, chemical polishing treatment is performed on the 4J36 foil after electroplating, and tiny surface defects are removed by chemical reaction to make the surface smoother and flatter; the surface roughness of the 4J36 foil after treatment is reduced to Ra0.1-0.2 microns;

[0049] S4: Plasma activation treatment, the cleaned 4J36 foil is placed in a plasma treatment chamber, and a plasma generator is started to ionize the gas to form plasma. The active particles in the plasma react physically and chemically with the surface of the 4J36 foil, thereby increasing the surface energy of the material, enhancing its compatibility and adhesion with flexible materials, and laying a good foundation for subsequent coating treatment.

[0050] S5: coating treatment, coating a layer of hydrophobic and oleophobic coating on the surface of the 4J36 foil after plasma activation treatment; giving the foil special properties, such as waterproof, oil-proof, corrosion-resistant, etc., to improve its stability and durability in the use environment.

[0051] S6: hot rolling treatment, wherein the 4J36 foil is protected by nitrogen and hot rolled; the hot rolling further improves the organizational structure and mechanical properties of the foil, and the phosphorus removal step further improves the purity and quality of the material, reduces the pressing amount, and improves the overall performance of the material.

[0052] S7: Shot blasting and sand grinding: the 4J36 foil after hot rolling is shot blasted and sanded to remove surface particles; ensure that the surface of the foil is flat and defect-free, providing a good surface state for subsequent processing and use.

[0053] S8: Inspection and packaging: quality inspection is performed on the processed 4J36 foil to ensure that the performance meets the design requirements.

[0054] The plasma source in S4 is radio frequency (RF) plasma, direct current (DC) plasma or microwave plasma.

[0055] The hydrophobic and oleophobic coating in S5 is polytetrafluoroethylene (PTFE) or a silane coupling agent.

[0056] The step S6 can also be carried out in a vacuum, which helps to reduce oxidation reactions during hot rolling and improve the quality of the material.

[0057] The cleaning method used in S1 is ultrasonic cleaning or chemical cleaning, and the cleaning time is 5-15 minutes.

[0058] The power of the plasma generator is 100-500w.

[0059] The hot rolling temperature in S6 is 700-1200°C.

[0060] In the S7, the shot blasting speed is 10-30 m / s, and the sanding particle size is 80-400 mesh, so as to ensure that the shot blasting and sanding treatment can remove the surface particles while avoiding excessive damage to the foil.

[0061] Embodiment 2

[0062] See also Figure 2 , and a dephosphorization step can be added during the hot rolling process to remove the oxide particles attached to the surface of the material and reduce the amount of pressure. It helps to remove the oxide particles attached to the surface of the material, further reduce the amount of pressure, and improve the purity and performance of the material.

[0063] Working principle: In the pretreatment stage, the surface of 4J36 foil is thoroughly cleaned to remove oil, impurities and oxide layer, and then the 4J36 foil is electroplated to enhance the mechanical properties and corrosion resistance of 4J36 foil. At the same time, it also acts as a barrier to effectively isolate the direct contact between the substrate and the external environment. The thickness of the electroplating layer is controlled between 5-10 microns, which not only ensures sufficient protection effect, but also avoids stress concentration and increased processing difficulty caused by excessive thickness. Then chemical polishing is performed to remove tiny defects and rough spots on the surface of the electroplating layer and the substrate through chemical reaction, making the surface smoother and flatter, and reducing the surface roughness to Ra 0.1-0.2 microns, it also eliminates potential active points of oxidation reactions, reduces the attachment and growth space of oxides, and finally uses plasma activation treatment to bombard the material surface with high-energy ions, triggering physical and chemical reactions to form a highly active surface layer. This active layer not only enhances the bonding between the coating and the substrate, but also may improve the material's antioxidant properties by changing the surface chemical composition and structure. A hydrophobic and oleophobic coating is coated on the surface of the 4J36 foil after plasma activation treatment to form a solid protective barrier. This structure, from pretreatment to coating treatment, to hot rolling and subsequent treatment, is designed to reduce the conditions for the occurrence of oxidation reactions and enhance the material's protective properties, thereby improving the antioxidant ability of the overall structure of the 4J36 foil and avoiding internal oxidation during processing.

[0064] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A 4J36 surface treatment process for a flexible screen metal mask backplane foil, characterized in that: The specific steps include: S1: Pretreatment, cleaning the 4J36 foil to remove surface oil, impurities and oxide layer, ensuring that the surface of the 4J36 foil is clean and scratch-free; and drying the cleaned foil to prepare for subsequent surface treatment; S2: electroplating treatment, electroplating is performed on the surface of the pretreated 4J36 foil, and the thickness of the electroplating layer is controlled between 5-10 microns; S3: Chemical polishing treatment, chemical polishing treatment is performed on the 4J36 foil after electroplating, and tiny surface defects are removed through chemical reaction to make the surface smoother and flatter; the surface roughness of the 4J36 foil after treatment is reduced to Ra 0.1-0.2 microns; S4: Plasma activation treatment, placing the cleaned 4J36 foil into a plasma treatment chamber, starting a plasma generator, ionizing the gas to form plasma, and allowing active particles in the plasma to physically and chemically react with the surface of the 4J36 foil; S5: coating treatment, coating a layer of hydrophobic and oleophobic coating on the surface of the 4J36 foil after the plasma activation treatment; S6: hot rolling treatment, nitrogen protection is performed on the 4J36 foil, and hot rolling is performed on the foil; S7: Shot blasting and sand grinding, the 4J36 foil after hot rolling is shot blasted and sanded to remove surface particles; S8: Inspection and packaging: perform quality inspection on the processed 4J36 foil to ensure that the performance meets the design requirements.

2. According to claim 1, a 4J36 surface treatment process for a flexible screen metal mask backplane foil is characterized in that: The plasma source in S4 is radio frequency (RF) plasma, direct current (DC) plasma or microwave plasma.

3. The 4J36 surface treatment process for a flexible screen metal mask backplane foil according to claim 2 is characterized in that: The hydrophobic and oleophobic coating in S5 is polytetrafluoroethylene (PTFE) or a silane coupling agent.

4. The 4J36 surface treatment process for a flexible screen metal mask backplane foil according to claim 1 is characterized in that: The step S6 may also be performed in a vacuum.

5. The 4J36 surface treatment process for a flexible screen metal mask backplane foil according to claim 1 is characterized in that: The cleaning method used in S1 is ultrasonic cleaning or chemical cleaning, and the cleaning time is 5-15 minutes.

6. The 4J36 surface treatment process for a flexible screen metal mask backplane foil according to claim 1 is characterized in that: The power of the plasma generator is 100-500w.

7. The 4J36 surface treatment process for a flexible screen metal mask backplane foil according to claim 1 is characterized in that: The hot rolling temperature in S6 is 700-1200°C.

8. The 4J36 surface treatment process for a flexible screen metal mask backplane foil according to claim 7 is characterized in that: In the S7, the shot blasting speed is 10-30 m / s, and the sanding particle size is 80-400 meshes.

9. The 4J36 surface treatment process for a flexible screen metal mask backplane foil according to claim 7, characterized in that: A dephosphorization step can also be added during the hot rolling process to remove oxide particles attached to the surface of the material and reduce the amount of pressure.

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