Glitter resin molded material

Details Glitter resin molded material Glitter resin molded material

1998-06-15

2001-04-03

Hess, Bruce H. (Department: 1774)

Stock material or miscellaneous articles

Structurally defined web or sheet

Including components having same physical characteristic in...

C428S515000, C428S911000, C428S323000

Reexamination Certificate

active

06210782

ABSTRACT:

BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a resin molded material used for a side molding of an automobile, most particularly to a glitter resin molded material having metallic luster.
2. Description of the Related Arts
For producing a side molding for mounting to, for example, a side of an automobile, a coating treatment has conventionally been used in which a surface of a resin molded material, of, for example, a side molding, is coated with a coating material having metallic luster.
It was suggested to mold the metallic luster in the resin molded material itself to avoid the coating process for the purpose of improvement of reproducibility and rationalization of the production process. In the production of a resin molded material having metallic luster, the surface of a core layer was coated with a skin layer including a pigment component and a glitter material. The pigment component and the glitter material were suitably selected and used in accordance with an intended color tone.
However, it has been difficult for the above conventional glitter resin molded material to provide the metallic luster and glitter feel that are equivalent to that of coated materials.
Therefore, it has been suggested that the color tone of the molded article would be improved by adjusting the composition of the pigment component and the glitter material included in the skin layer. In particular, adjustment of the particle size and the amount of the glitter material and a surface treatment performed by resin coating or an inorganic metallic oxide or the like have been suggested as examples.
However, the metallic luster and the glitter feel have not yet been obtained to the same extent as with the coating.
SUMMARY OF THE INVENTION
In view of the foregoing, it is therefore an object of the present invention to provide a glitter resin molded material which has a glitter feel that is equivalent to that of a coated material.
The present invention provides a glitter resin molded material comprising a skin layer coating a surface of a core layer, wherein the core layer contains a color pigment and a synthetic resin and the skin layer contains a glitter material, a color pigment and a synthetic resin, and wherein the skin layer has a Contrast Ratio value (hereinafter referred to as CR) of less than 99%.
In this invention, a CR value means an index representing transparency of the skin layer. As the CR value becomes smaller, the transparency of the skin layer becomes higher and as the CR value becomes greater, the transparency of the skin layer becomes lower.
In this invention, the CR value of the skin layer is set to be smaller than 99%.
Thus, a transparency can be imparted to the skin layer and the color of an interior core layer can be seen on the surface of the glitter resin molded material.
Namely, the metallic luster and color depth of the skin layer itself are improved by imparting transparency to the skin layer. Moreover, a color tone with high gloss, glitter and deep feel can be achieved by the glitter resin molded material wherein light transmits through the skin layer and is then reflected by the surface of the core layer which is colored with a coloring pigment.
Further, a glitter material becomes shiny when it receives light incident on the skin layer and/or light reflected by the core layer. Thus, a color tone with high luster, glitter and a deep feeling of the skin layer having the above transparency can be further reinforced.
The CR value of the skin layer is preferably less than 95%. With this value, the color of the internal core layer can be effectively presented on the surface of the glitter resin molded material. A CR value of the skin layer is preferably no lower than 0.1% and is desirably 20%. Thus, the colors for the skin layer and the core layer can be harmonized.
The resin molded material has a two-layer structure formed of the core layer and skin layer. Impact resistance and rigidity are provided to the resin molded material by the core layer, and decorative effects and durability are imparted thereto by the skin layer.
As aforementioned, in accordance with the present invention, it is possible to provide a glitter resin molded material having glitter feel equivalent to that of a coated material, having a deep and quality appearance, an excellent lustrous feeling and excellent strength and durability.


REFERENCES:
patent: 5800912 (1998-09-01), Ogiso et al.
patent: 58-37045 (1983-04-01), None

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