Glass textured pvd coating structure and method of manufacture

Abstract

The application belongs to the technical field of automobile exterior coating structure, and provides a glass crack PVD coating structure and a manufacturing method. The glass crack PVD coating structure comprises, from bottom to top, a substrate layer, a middle coating layer, a PVD layer and a protective layer. The middle coating layer and the PVD layer are formed with glass cracks. The glass crack PVD coating structure is manufactured through injection molding, baking, spraying, PVD plating, glass crack formation and protective layer spraying. The application has the advantages that a unique PVD process is adopted, the formed glass cracks have fine lines and strong metallic texture, the glass crack film layer realized by the application has light transmission, the glass crack lines on the appearance can be realized, and the color effect under different color light sources can be realized. The application can be used in surface treatment processes of automobile interior and exterior parts, and can also be used in various toys, packaging, cosmetics and building decoration industries, and has good portability.

Description

Technical Field

[0001] This invention belongs to the field of automotive exterior coating structure technology, and relates to a glass crackle PVD coating structure and manufacturing method. Background Technology

[0002] With the development of intelligent automotive interior and exterior components, including the diversification of colors and the continuous emergence of various interactive functions, consumers' demands for automotive interior and exterior components have shifted from simple choices to a greater tendency towards personalization. This has led to the emergence of various new surface technologies, and currently, automakers are increasing their R&D investment in this expanding market. Among these, the glass-crack texture PVD surface treatment technology has not yet been applied to automotive interior and exterior components and is still in a blank period. This is because automotive interior and exterior components have high requirements for film performance and appearance quality, and urgently need a breakthrough in new technologies. Existing paints can directly create an "ice flower" effect, but they cannot adjust the film layer to present the state of glass crack patterns. They cannot achieve both a delicate bright silver metallic texture and a clear and fine crack pattern effect. In other words, the effect of imitating glass crack patterns is not realistic. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a glass-crack PVD coating structure and manufacturing method with a bright silver glass crack effect, fine texture and strong metallic feel, in view of the current situation of the prior art.

[0004] The technical solution adopted by the present invention to solve the above-mentioned technical problems is: a glass crackle PVD coating structure, characterized in that it includes a substrate layer, an intermediate coating layer, a PVD layer and a protective layer from bottom to top, wherein glass crackle is formed on the intermediate coating layer and the PVD layer.

[0005] In the aforementioned glass-crack PVD coating structure, a primer coating is also provided between the substrate layer and the intermediate coating layer.

[0006] In the aforementioned glass-crack PVD coating structure, the base coating is a thermosetting coating or a UV coating, specifically polyurethane or polyurethane acrylic resin, and the thickness of the base coating is 20-30 μm.

[0007] In the aforementioned glass-crack PVD coating structure, the intermediate coating is a UV-cured coating, specifically a polysiloxane coating, and the thickness of the intermediate coating is 20-50 μm.

[0008] In the aforementioned glass-crack PVD coating structure, the PVD layer is a color-developing layer, specifically formed using a metal target with indium, aluminum, or chromium plating, and the thickness of the PVD layer is 20-50 nm.

[0009] In the aforementioned glass-crack PVD coating structure, the protective coating is a UV-cured coating, specifically a polyurethane acrylic resin coating, and the film thickness of the protective coating is 20-30 μm.

[0010] In the aforementioned glass-crack PVD coating structure, the substrate layer material is optical-grade PC material with a light transmittance greater than or equal to 88%.

[0011] The present invention also provides a method for manufacturing a glass-cracked PVD coating structure, characterized by comprising the following steps:

[0012] Step 1: The substrate layer is made of PC material and a PC substrate is injection molded. The injection-molded PC substrate is then baked at 120°C for 2 hours in a high-temperature oven.

[0013] Step 2: Bake the thick PC substrate and then wipe it with IPA to remove grease;

[0014] Step 3: Apply a polyurethane or polyurethane acrylic resin coating to the substrate layer to form a base coat. Bake at 50°C for 5 minutes, with a UV curing energy of 1500 mJ / cm2, a curing power of 200 mW / cm2, and a dry film thickness of 23 micrometers.

[0015] Step 4: Spray polysiloxane coating on the base coat, with a flash-drying temperature of 23°C and a time of 10 minutes, resulting in a dry film thickness of 40 micrometers.

[0016] Step 5: Turn on the PVD equipment, adjust the vacuum level to 5.0E-3Pa, and perform vacuum evaporation to plate indium, aluminum, or chromium;

[0017] Step 6: Place the product after the PVD layer is completed in a salt bath for 30 minutes, then move it into the salt bath within 10 seconds. After the PVD and intermediate coating layers produce glass cracks, remove it.

[0018] Step 7: Spray acrylic polyurethane coating onto the product with glass crack patterns, bake at 50℃ for 5 minutes, UV curing energy of 2500mJ / cm2, curing power of 200mW / cm2, and dry film thickness of 23 micrometers to protect the glass crack patterns.

[0019] Compared with existing technologies, the advantages of this invention are: the unique PVD process creates a glass crackle effect with delicate texture and strong metallic feel. The glass crackle film layer achieved by this patent is translucent, and can achieve a colored effect under different colored light sources while realizing the appearance of glass crackle texture. In addition to being used as a surface treatment process for automotive interior and exterior parts, this patent can also be used in various industries such as toys, packaging, cosmetics, and architectural decoration, and has good portability. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the PVD coating structure for glass crackle patterns;

[0021] Figure 2 This is a schematic diagram of the glass-crack texture PVD coating structure. Detailed Implementation

[0022] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0023] In the description of this invention, it should be understood that the terms "center," "lateral," "longitudinal," "front," "rear," "left," "right," "upper," "lower," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of this invention.

[0024] In the diagram, the substrate layer is 100; the intermediate coating layer is 200; the PVD layer is 300; the protective layer is 400; the primer layer is 500; and the glass crackle pattern is 600.

[0025] like Figure 1 and Figure 2As shown, this glass-crack PVD coating structure comprises, from bottom to top, a substrate layer 100, a mid-coat layer 200, a PVD layer 300, and a protective layer 400. Glass crack patterns 600 are formed on the mid-coat layer 200 and the PVD layer 300. The substrate layer 100 is made of optical-grade PC material with a light transmittance greater than or equal to 88%. This patent uses a base coat 500 and a mid-coat layer 200 on the substrate layer 100, and performs a PVD process on the mid-coat layer 200 to create the PVD layer 300. A protective coating is then applied over the PVD layer 300. This patent can use three or four layers on the substrate layer 100. For example, using three layers would result in the mid-coat layer 200, the PVD layer 300, and the protective layer 400; using four layers would result in the base coat 500. The substrate layer 100 consists of a mid-coat layer 200, a PVD layer 300, and a protective layer 400. A primer layer 500 is also provided between the substrate layer 100 and the mid-coat layer 200. The primer layer 500 is a thermosetting coating or a UV coating, specifically polyurethane or polyurethane acrylic resin, with a film thickness of 20-30 μm. The mid-coat layer 200 is a UV-curable coating, specifically a polysiloxane coating, with a thickness of 20-50 μm. The PVD layer 300 is a color development layer, specifically formed using a metal target with indium, aluminum, or chromium plating, with a thickness of 20-50 nm. The protective coating is a UV-curable coating, specifically a polyurethane acrylic resin coating, with a film thickness of 20-30 μm.

[0026] Example 1

[0027] The specific implementation method is as follows: Step 1: The substrate layer 100 is made of PC material and a PC substrate is injection molded. The injection-molded PC substrate is then baked at 120°C for 2 hours in a high-temperature oven. Step 2: The PC substrate is baked to a thicker thickness and then wiped and degreased using IPA. Step 3: A polyurethane or polyurethane acrylic resin coating is sprayed onto the substrate layer 100 to form a base coating 500. The baking temperature is 50°C, the baking time is 5 minutes, the UV curing energy is 1500 mJ / cm2, the curing power is 200 mW / cm2, and the dry film thickness is 23 micrometers. Step 4: A polysiloxane coating is sprayed onto the base coating 500. The flash-drying temperature is 23°C, the time is 10 minutes, and the dry film thickness is 40 micrometers. Step 5: Turn on the PVD equipment, adjust the vacuum degree to 5.0E-3Pa, and perform vacuum evaporation to deposit indium, aluminum, or chromium with a thickness of 25nm; Step 6: After the PVD layer 300 is completed, place the product at 120℃ for 30 minutes, and then move it to a salt bath at -20℃ within 10 seconds. After the PVD and intermediate coating 200 produce glass crackle 600, remove it; Step 7: Spray acrylic polyurethane coating on the product with glass crackle 600, bake at 50℃ for 5 minutes, UV curing energy of 2500mJ / cm2, curing power of 200mW / cm2, and dry film thickness of 23 micrometers to protect the glass crackle 600.

[0028] Example 2:

[0029] The only difference between Example 2 and Example 1 is that the thickness of the PVD layer 300 is deposited to 45nm in step five. After the product is completed, it still has the glass crackle effect that allows light to pass through, and the appearance is metallic silver.

[0030] Example 3:

[0031] The only difference between Example 3 and Example 1 is that in step six, the temperature of the -20℃ salt bath is adjusted to 0℃, and the product still has a translucent glass crack effect after completion.

[0032] Comparative Example 1:

[0033] The only difference between Comparative Example 1 and Example 1 is that the thickness of the PVD layer 300 is deposited to 5nm in step five. After the product is completed, the product does not have a metallic silver effect, but it has a glass crackle effect.

[0034] Comparative Example 2:

[0035] The only difference between Comparative Example 2 and Example 1 is that the thickness of the PVD layer 300 is deposited to 70nm in step five. After the product is completed, it has a metallic silver effect and a textured appearance, but it is not transparent.

[0036] Comparative Example 3:

[0037] The only difference between Comparative Example 3 and Example 1 is that after the product was taken out of the high-temperature furnace in step six and placed at room temperature of 23°C, the product only showed a mirror effect and did not achieve the expected glass crackle effect.

[0038] The appearance and transmittance test results of Examples 1-3 and Comparative Examples 1-3 are shown in Table 1. Table 1: Data and results of Examples 1-3 and Comparative Examples 1-3 in various directions:

[0039]

[0040] The specific embodiments described herein are merely illustrative examples illustrating the spirit of the invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the scope defined by the spirit of the invention.

Claims

1. A glass-crack PVD coating structure, characterized in that, The structure comprises, from bottom to top, a substrate layer, a mid-coat layer, a PVD layer, and a protective layer. The mid-coat and PVD layers have a glass-crack pattern. A primer layer is also provided between the substrate layer and the mid-coat layer. The primer layer is a thermosetting coating or a UV coating, specifically polyurethane or polyurethane acrylic resin, with a film thickness of 20-30 μm. The mid-coat layer is a UV-curable coating, specifically a polysiloxane coating, with a thickness of 20-50 μm. The PVD layer is a color-developing layer, specifically formed using a metal target with indium, aluminum, or chromium plating, with a thickness of 20-50 nm. The protective layer is a UV-curable coating, specifically a polyurethane acrylic resin coating, with a film thickness of 20-30 μm. The substrate is prepared according to the following steps: Step 1: The substrate layer is made of PC material and a PC substrate is injection molded. The injection-molded PC substrate is then baked at 120°C for 2 hours in a high-temperature oven; Step 2: The PC substrate is baked to a thicker thickness and then wiped and degreased using IPA; Step 3: A polyurethane or polyurethane acrylic resin coating is sprayed onto the substrate layer to form a base coating. The baking temperature is 50°C, the baking time is 5 minutes, the UV curing energy is 1500 mJ / cm², and the curing power is 200 kJ / cm². Step 4: Spray polysiloxane coating on the primer layer, flash-dry temperature is 23℃, time is 10min, dry film thickness is 40 micrometers; Step 5: Turn on the PVD equipment, adjust the vacuum degree to 5.0E-3Pa, and perform vacuum evaporation plating of indium, aluminum or chromium; Step 6: Place the product after PVD layer is completed at 120℃ and keep it for 30min, and then move it into the salt bath within 10s. After the PVD and intermediate coating layers produce glass cracks, take it out; Step 7: Spray acrylic polyurethane coating on the product with glass cracks, bake at 50℃, bake for 5min, UV curing energy is 2500mJ / cm2, curing power is 200mW / cm2, dry film thickness is 23 micrometers, to protect the glass cracks.

2. The glass-crack PVD coating structure according to claim 1, characterized in that, The substrate layer material is optical grade PC material with a light transmittance of ≥88%.

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