A plastic part paint layer structure

Abstract

A plastic part paint layer structure, including the primer layer that sets on the plastic part base surface, the refraction layer that sets on the primer layer surface, and the finish layer that sets on the refraction layer surface, the primer layer, finish layer are all plane layers, and the primer layer is color paint layer, finish layer is varnish layer, the refraction layer includes at least one thin layer area, at least one thick layer area, thin layer area and thick layer area interval distribution, and thin layer area, thick layer area are connected through the transition connection of inclined plane area between each other.The utility model discloses on the basis of satisfying the durability of plastic part product, make the product surface have aesthetic feeling, improve product competitiveness.

Description

Technical Field

[0001] This utility model relates to the field of plastic processing, and in particular to a paint layer structure for plastic parts. Background Technology

[0002] Plastic products need to be painted on their surface. Typically, a primer and a topcoat are sprayed in sequence to form a paint layer to ensure the durability of the plastic products.

[0003] However, some products with plastic shells have requirements for aesthetic appearance. Conventional paint layers consisting of primer and topcoat cannot produce products with an attractive appearance, making it difficult to meet consumer demands.

[0004] Therefore, designing an aesthetically pleasing paint layer structure for the plastic casing of a product is a problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0005] The purpose of this utility model is to address the shortcomings of existing technologies by providing a paint layer structure for plastic parts that, while ensuring the durability of plastic products, enhances the aesthetic appeal of the product surface and improves product competitiveness.

[0006] The technical solution of this utility model is: a paint layer structure for a plastic part, including a primer layer disposed on the base surface of the plastic part, a refractive layer disposed on the surface of the primer layer, and a topcoat layer disposed on the surface of the refractive layer. The refractive indices of the refractive layer and the topcoat layer are different. Both the primer layer and the topcoat layer are planar layers, and the primer layer is a colored paint layer and the topcoat layer is a clear varnish layer. The refractive layer includes at least one thin layer region and at least one thick layer region. The thin layer region and the thick layer region are distributed alternately, and the thin layer region and the thick layer region are connected by a sloped region.

[0007] The thickness of the primer layer is 15-25 μm, the thickness of the thick layer of the refractive layer is 8-12 μm, the thickness of the thin layer is 0-2 μm, and the thickness of the topcoat layer is 10-20 μm.

[0008] The refractive layer contains a number of additive particles, which are aluminum powder particles, copper-zinc alloy powder particles, mica titanium pearl powder particles, PET film fragments, or PC film fragments.

[0009] The thick region of the refractive layer is located in the middle area of ​​the refractive layer, while the thin region is located at the edge of the refractive layer.

[0010] A coating layer with a thickness of 0.05-0.5μm is provided on the surface of the primer layer. The coating layer is composed of a number of aluminum powder particles, silver powder particles, titanium nitride particles, titanium carbide particles, or silicon oxide particles deposited on the surface of the primer layer.

[0011] The above technical solution has the following beneficial effects: 1. The coating structure of the plastic part includes a primer layer on the base surface of the plastic part, a refractive layer on the surface of the primer layer, and a topcoat layer on the surface of the refractive layer. The primer layer provides a uniform base color, covers the color and defects of the plastic base surface itself, and enhances the adhesion of the topcoat layer. The topcoat layer provides a high-gloss, high-hardness, scratch-resistant, and chemical-resistant protective layer, and improves the product's texture. Obviously, the topcoat layer is translucent. The refractive layer connects the primer layer and the topcoat layer and refracts the light from the primer layer, achieving a smooth gradient effect through gradual refraction in different areas. Both the primer layer and the topcoat layer are planar layers, with the primer layer being a colored paint layer and the topcoat layer being a clear coat layer. That is, the primer layer reflects the base paint color outwards, while the topcoat layer is translucent. The refractive layer includes at least one thin layer region and at least one thick layer region, with the thin layer region and the thick layer region being distributed alternately. The thin layer region and the thick layer region are connected by a beveled area, which forms a triangular prism. This allows the light reflected from the primer layer to exhibit a gradient effect when emitted at different angles (viewed from different angles), thereby improving the aesthetics of the plastic parts and enhancing the product's competitiveness.

[0012] 2. The refractive layer contains a number of additive particles, which are aluminum powder particles, copper-zinc alloy powder particles, mica titanium pearl powder particles, PET film fragments, or PC film fragments. The distributed additive particles reflect light and work synergistically with the primer layer to create a gradual reflection effect, further enhancing the product's aesthetics and competitiveness.

[0013] 3. The thicker area of ​​the refractive layer is located in the middle region of the refractive layer, while the thinner area is located at the edge of the refractive layer, which makes the area where the light reflected by the primer layer presents a gradient effect more visible.

[0014] 4. A coating layer with a thickness of 0.05-0.5μm is provided on the surface of the primer layer. The coating layer is composed of several aluminum powder particles, silver powder particles, titanium nitride particles, titanium carbide particles, or silicon oxide particles deposited on the surface of the primer layer. The coating layer blocks the primer layer from reflecting light, while the coating layer itself reflects silver-white, gold, iridescent, or multicolored light, achieving a metallic / pearlescent texture and a gradient effect, further enhancing the aesthetics of the product and improving its competitiveness.

[0015] The following description, in conjunction with the accompanying drawings and specific embodiments, provides further details. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of Example 1; Figure 2 This is a schematic diagram of the structure of Example 2; Figure 3 This is a schematic diagram of the structure of Example 3.

[0017] In the attached diagram, 1 is the primer layer, 2 is the refractive layer, 3 is the topcoat layer, 4 is the thin layer area, 5 is the thick layer area, 6 is the sloping area, 7 is the additive particles, and 8 is the coating layer. Detailed Implementation Example 1

[0018] See Figure 1 The coating structure of the plastic part includes a primer layer 1 on the base surface of the plastic part, a refractive layer 2 on the surface of the primer layer, and a topcoat layer 3 on the surface of the refractive layer. Before applying the primer layer to the surface of the plastic part, dust, oil, and static electricity are removed from the surface of the plastic part. Both the primer layer 1 and the topcoat layer 3 are planar layers, and the primer layer is a colored paint layer and the topcoat layer is a clear varnish layer. Specifically, the primer layer is a solvent-based or water-based primer containing pigments. The application viscosity is controlled to a flow time of 12-15 seconds using a Ford No. 4 cup. It is sprayed 2-3 times using an automatic spraying method to ensure a smooth paint layer. After spraying, it is baked in an oven at 60-70℃ for 20-30 minutes for curing. The thickness of the cured primer layer is controlled to be 15-25μm. The refractive layer 2 includes at least one thin layer region 4 and at least one thick layer region 5. The thin layer region 4 and the thick layer region 5 are distributed alternately, and the thin layer region 4 and the thick layer region 5 are connected by a sloped region 6. In this embodiment, the refractive layer is selected as polyester clear varnish, and the construction viscosity is controlled to be 10-12 seconds for the flow time of Ford No. 4 cup. The thin layer region is set at the edge of the plastic part surface, while the thick layer region is set at the center of the plastic part surface. Specifically, the paint is first concentrated at the center to form a thick layer region, and then it is quickly spread outwards, with the amount of paint gradually decreasing, and a thin layer region is formed at the edge region. A sloped region is formed between the thick layer region and the thin layer region. After the spraying is completed, it is baked at a low temperature of 50-60℃ for 10-15 minutes. The thickness of the thick layer region 5 is 8-12μm, and the thickness of the thin layer region 4 is 0-2μm. After the refractive layer has cured, a clear coat is sprayed in a cleanroom, typically using UV varnish. The viscosity is controlled at 30-45 seconds using a Ford No. 4 cup, and the thickness is controlled at 10-20 μm. It is then left to stand in a greenhouse for 3-5 minutes, followed by baking in an IR tunnel oven at 40-50℃ for 2-3 minutes, and finally cured in a high-intensity UV curing machine (wavelength 365nm, energy 800-1200 mJ / cm²). 2 Irradiate for 10-30 seconds to complete curing, resulting in a paint layer structure for plastic parts with gradient colors. Example 2

[0019] See Figure 2 The difference from Example 1 is that a number of additive particles 7 are distributed in the refractive layer 2. The particle size of the additive obviously needs to be determined according to the thickness of the refractive layer. The additive particles can be aluminum powder particles, copper-zinc alloy powder particles, mica titanium pearl powder particles, PET film fragments, or PC film fragments. Example 3

[0020] See Figure 3 The difference from Example 1 is that a coating layer 8 is provided on the surface of the primer layer 1. The thickness of the coating layer 8 is 0.05-0.5μm. The coating layer 8 is composed of several aluminum powder particles, silver powder particles, titanium nitride particles, titanium carbide particles, or silicon oxide particles deposited on the surface of the primer layer. The deposition process adopts the existing vacuum coating process.

Claims

1. A paint layer structure for a plastic part, characterized in that: It includes a primer layer (1) disposed on the base surface of the plastic part, a refractive layer (2) disposed on the surface of the primer layer, and a topcoat layer (3) disposed on the surface of the refractive layer. The refractive indices of the refractive layer and the topcoat layer are different. Both the primer layer (1) and the topcoat layer (3) are planar layers, and the primer layer is a colored paint layer and the topcoat layer is a clear varnish layer. The refractive layer (2) includes at least one thin layer region (4) and at least one thick layer region (5), with the thin layer region (4) and the thick layer region (5) distributed at intervals, and the thin layer region (4) and the thick layer region (5) are connected by a sloped region (6).

2. The paint layer structure of the plastic part according to claim 1, characterized in that: The thickness of the primer layer (1) is 15-25 μm, the thickness of the thick layer (5) of the refractive layer is 8-12 μm, the thickness of the thin layer (4) is 0-2 μm, and the thickness of the topcoat layer (3) is 10-20 μm.

3. The paint layer structure of the plastic part according to claim 1, characterized in that: The thick region (5) of the refractive layer (2) is located in the middle region of the refractive layer, and the thin region (4) is located at the edge of the refractive layer.

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