JPH0238160A - Ornamental member of vehicle - Google Patents

Abstract

PURPOSE:To form the ornamental member of a vehicle with the appearance of mild and metallic glowing and the deeply colored appearance by forming the underpaint surface of fine granular material as an undercoat on the surface of a plastics form, forming a glowing metal film layer on the surface of the plastic form through the vacuum deposition process, and further forming a transparent or semi-transparent top coat on the layer. CONSTITUTION:An undercoat 2'' having the desired skin surface of the fine- pigment-suspended coat is formed on the surface of a plastics material 1 used to form a plastics molded part such as a cover or a food generally used for a vehicle. Then a glaring surface of a metal film 3 is formed on the fine- pigment-suspended coat through the vacuum deposition process or the sputtering process. A transparent or a semi-transparent top coat 4'' is built on this metal film 3 as a protection coat. As the undercoat 2'', organic or disorganic fine- pigment which is scattered using the ultra-violet ray hardening synthetic resin included in the acrylic resin system as a vehicle is appropriate. As the top coat 4'', two-liquid type low temperature hardening urethane synthetic resin paint, for example, is used.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a plastic vehicle decoration body used as a part of a cover that also serves as a decoration for covers, hoods, etc. used for vehicles in general.

[Prior art] Conventional products of this type are usually plated or painted, and sometimes they are coated with electrical special coatings such as matte or velor to give a more sophisticated aesthetic appearance. Plating or metallic coating has been adopted, but this special electroplating has problems in process control and cost, and metallic coating has a limit to its brightness.

In addition, plating technology has the disadvantage that it is not possible to achieve the necessary and sufficient durability and strength (toughness) in terms of impact resistance, so it is not preferred as a cover part for a vehicle and is not used.

As a method to give an elegant appearance and shine to the knees,
There is also a method of applying a matte top coat to a glossy plated surface, but this technique has poor adhesion between the glossy plated surface and the top coat between the eyebrows, and lacks depth, which is one of the important elements of a sophisticated appearance. , it is not sufficient because the top coat located on the upper layer eliminates the gloss.

On the other hand, in the method of applying the above-mentioned special electroplating to the base layer, performing appropriate treatment after plating to improve adhesion, and then applying the upper layer top coat, the adhesion is stable and the depth is also improved. However, by using plating for the base layer, the necessary and sufficient toughness in terms of impact resistance cannot be achieved as described above, and no industrially satisfactory method has yet been established.

In other words, what is shown in FIG. 1 is that an undercoat (2) is applied on top of a plastic material (1), and then a flat mirror surface of a thin metal M (3) is coated on top of the undercoat (2) by a method such as sputtering.
Conventional products have a matte or velor-like glossy finish with a top coat (4) containing fine particles of pigment, but the appearance of these products tends to change due to deterioration even under normal usage conditions.

In addition, the second illustration shows a special electrolytic plating (2°) with a matte finish or velor finish having a metallic luster on the plastic material (1), and a pre-treatment layer or This product has a primer layer (3') overlaid and a top coat (4') that adds depth on top of the primer layer.This product has an advantage over conventional technologies in terms of wear and durability. It has a certain level of appearance, and has a certain degree of depth in appearance, and has a so-called mild metallic luster, giving it a sophisticated appearance. However, it has the disadvantage that sufficient toughness cannot be obtained.

[Problem to be solved by the invention] The gloss of the surface is in harmony with the basic color tone17, giving it a noble and elegant appearance.During the day, it appears to shine in the scattered light of the outside world, and at night, it reflects the surrounding light. To provide a decorative body for a vehicle that reflects mildly and has good visual recognition, and that can easily obtain a desired design effect in which the state of reflection, color tone, and degree of depth can be arbitrarily controlled. It's about doing.

[Means for solving the problem] A fine-grain base coating surface is formed as an undercoat on the outer surface of a plastic molded body, and a bright metal thin film layer is formed on this base coating surface by vacuum deposition or sputtering. A vehicle decoration body characterized by having a transparent or translucent top coat applied thereon, and the undercoat being made of an ultraviolet curable synthetic resin vehicle and organic or inorganic fine pigment particles dispersed therein. In addition, Totsubuko is a vehicle decoration body characterized by being colorless, colored and transparent, or slightly turbid and translucent.

[Operations] This invention is used as a vehicle decoration, and its surface gloss harmonizes with the basic color tone to give it a sophisticated and elegant appearance.The metal thin film layer has a fine grained surface and there is no reflection, so it can be used as a decorative object in the outside world during the daytime. It looks shiny, but at night it mildly reflects the surrounding light and feels nice.

Further, since the state of reflection, color tone, and degree of depth can be appropriately and arbitrarily controlled, a desired design effect can be easily obtained.

"Example" As shown in Figure 3, the surface of the plastic material (1) forming the plastic molded part is coated with undercoat 1 to (2") of desired texture, which is made of a coated surface with fine pigment suspended. It is formed.

This undercoat (2") is an undercoat applied to ensure adhesion with the plastic material (1) and appearance surface brightness, and is necessary and sufficient for sputtering etc. applied to this upper layer. Using a synthetic resin vehicle with almost no solvent is advantageous in terms of the heat resistance of the plastic material (1) and the formation of a fine particle surface.

The fine pigment may be an organic type such as polyethylene resin globules or an inorganic type such as anhydrous silica powder, but the particle size is suitably from IL to 25 microns. Also, the amount added is 15 to 25% based on the weight of the base.
is appropriate. A bright surface of a metal thin film (3) is formed on the fine grain surface thus formed by a method such as vacuum deposition or sputtering.

This metal thin @ (3) may be vapor-deposited aluminum, but
Sputtering of chromium metal or chromium-based corrosion-resistant alloys, especially pure chromium metal, has excellent durability and corrosion resistance. In the case of pure chromium metal, an ultraviolet curable synthetic resin vehicle such as acrylic resin is suitable for the undercoat (2'') in view of the balance with its hard physical properties.

On top of this is the final protective layer, Naruto Nobu Coat. This is weather resistant, especially rH resistant.
In terms of brittleness, a two-component type urethane-based synthetic resin paint that can be cured at low temperatures is suitable.

In addition, due to design requirements, this top coat (4") is coated with very fine, translucent pigments such as silicic anhydride fine powder (colloidal silica) to reduce brightness, and with appropriate coloring pigments. Addition of concentration or oil dye!!
By coloring with machine dyes, etc., the reflection of the underlying metal thin film (3) can be moderated and adjusted as appropriate, such as colorless, colored, transparent, low-temperature, or translucent, to create a sophisticated, elegant, deep, and mild metallic feel. As described above, this invention has an extremely stable structure and performance compared to the product shown in FIG. .

Next, a mutual comparison of performance regarding these points is shown in Figure 4a with the results of an impact test based on the DuPont method.

It is shown in Figure 4. In each figure, the vertical axis shows impact resistance (% relative to paint), and the horizontal axis shows specimen A prepared by various methods using an ABS resin plate (thickness 3 mm).

B, C, and D are shown. As is clear from these figures, specimen A of the present invention is significantly more durable than plated (base electroplating and top coat) finished product B and plated (Nt-Cr) finished product C. It has excellent properties and is completely comparable to metallic painted products normally used for vehicles.

[Effects of the Invention] The vehicle decoration body of the present invention can easily set the gloss, texture, and color tone, and can correspond to a wide range of design effects, and has an appearance that directly reflects light like a glossy plated product. It has a deep appearance with a so-called mild metallic luster that is sophisticated and elegant. This product is extremely suitable and effective as a vehicle decoration, as it has impact resistance and can express the appearance of a deep, mild metal film. In other words, by combining the above-mentioned undercoat that constitutes the fine grain surface, a bright metal thin film layer formed by metal vapor deposition or sputtering, and the top coat, it can be manufactured easily and inexpensively, and it can produce the deep, noble and elegant taste described above. The objective is to provide a product that can express a certain color tone and a mild metallic luster, and has the necessary and sufficient toughness in terms of impact resistance.

[Brief explanation of the drawing]

Figure 1 is a partially enlarged sectional view of the conventional product, and Figure 2 is the same.
Part 3 is an enlarged cross-sectional view of a conventional Ike product (7I is a partially enlarged cross-sectional view of the product of the present invention, Figure 4a is a comparison diagram of the impact resistance of test pieces in the room temperature WI impact test, Part 4) The figure is a comparison diagram of the impact resistance of Tes I piece in a low temperature impact test.〈1)...Plastic material (2)...Undercoat (2゛)...・Undercoat with a matte or velor-like special electroplating that has a metallic luster (2")...Undercoat with suspended fine pigment (3)...Metal by a method such as sputtering Thin film (3')...Pretreatment layer or primer layer to improve adhesion

Claims (1)

[Claims] 1. A fine-grain base coat is formed as an undercoat on the outer surface of a plastic molded body, a bright metal thin film layer is formed on the base coat by vacuum deposition or sputtering, and a transparent or A vehicle decoration body characterized by being coated with a translucent top coat. 2. The vehicle decoration body according to claim 1, wherein the undercoat is made of an ultraviolet curable synthetic resin as a vehicle and organic or inorganic fine particles dispersed therein. 3. The vehicle decoration according to claim 1, wherein the top coat is colorless, colored transparent, or slightly turbid and translucent.