JPH0687169A - Resin molded product - Google Patents

Abstract

(57) [Abstract] [Purpose] When the viewing angle is changed, the visible light changes the visible part, so there is a crystal-like sparkle, it can also be colored vividly, and it has high machinability and high workability. Develop strong resin molded products. [Composition] Average particle size of the resin composition 0.3-2.0 mm
A resin molded product containing the pattern-forming resin particles of
The pattern-forming resin particles are particles obtained by dispersing scaly fine particles having an average particle diameter of 5 to 100 μm and having a glittering property with orientation, then curing or solidifying, and crushing. The purpose can be achieved by a resin molded product.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a resin molded product, and more particularly to a resin molded product having crystal-like glitter and high strength.

[0002]

2. Description of the Related Art A resin molded article has been proposed in which glass particles obtained by coating a release agent on a resin composition are blended. Since the release agent is applied, the glass particles blended with the resin composition do not adhere to each other, and the glass particles blended with the resin composition are in a peeled state, so that the resin molded product has a glittering feeling due to light reflection. Can have However, since the resin composition and the glass particles are separated from each other, there is a drawback in that the strength of the finished resin molded product is low. In addition, a resin molded product has been proposed in which particles of crushed natural ore or a mirror are mixed in the resin composition, but this resin molded product has extremely low machinability and the adhesive strength between the resin composition and particles. Has a drawback that the strength of the resin molded product as a finished product is low due to the low value.

Further, there has been proposed a resin molded product in which particles obtained by crushing a resin colored with an ordinary pigment are mixed in a resin composition. The resin molded product has a bright color but reflects almost all light. In addition, it does not have a crystal-like glittering feeling because it does not, and the reflection is not directional, although it reflects a little.

[0004]

SUMMARY OF THE INVENTION Problems to be solved by the present invention have been solved. When the viewing angle is changed, light is reflected and the visible part is changed. Develop a resin molded product that can be colored, has good machinability, and has high strength.

[0005]

Means for Solving the Problems The inventors of the present invention have conducted extensive studies to solve the above problems, and as a result, scale-like fine particles are dispersed in a resin with orientation, and then cured or solidified, Then, it was found that the problem can be solved by randomly blending the crushed resin particles into the resin composition, and the present invention has been completed.

The invention according to claim 1 of the present invention is a resin molded product in which resin particles for pattern formation having an average particle diameter of 0.3 to 2.0 mm are mixed in a resin composition. Is a resin molded product characterized in that it is a crushed particle that is obtained by dispersing scaly fine particles having an average particle diameter of 5 to 100 μm and having an orientation, and then curing or solidifying.

The resin used in the present invention may be a thermoplastic resin, a thermosetting resin, or a mixture thereof as long as it is transparent after being hardened or solidified. The resin of the matrix of the resin molded product and the resin of the pattern-forming resin particles may be the same or different.

The brilliant fine particles used in the present invention are scaly or flaky fine particles having an average particle diameter of 5 to 100 μm. Specific examples thereof include pearl pigments, synthetic or natural mica, but are not limited thereto. When the average particle diameter of the scaly fine particles having a glittering property is less than 5 μm, the characteristics are difficult to obtain even if the resin particles for pattern formation have an orientation property and are dispersed, and they are too small to have the characteristics as a pigment. . On the contrary, when it is 100 μm or more, uniform crystal-like glitter is impaired.

In the present invention, it is important to first disperse the above-mentioned scale-like fine particles in the resin so as to have orientation, and then to cure or solidify and pulverize. Unless the above-mentioned scale-like fine particles are dispersed in the resin so as to have an orientation, a uniform crystal-like glittering feeling cannot be obtained, so that the object of the present invention cannot be achieved. The method for dispersing the above-mentioned scale-like fine particles in the resin with orientation can be carried out, for example, by a centrifugal molding method. However, any method may be used as long as the scale-like fine particles can be arranged in parallel in the resin so as to have orientation. The average particle size of the pattern-forming resin particles used in the present invention is preferably 0.3 to 2.0 mm. 0.3 mm
When it is less than 1, it is too small to see the crystal-like glitter. Conversely, if it is 2.0 mm or more, it is too large,
There is a problem in terms of workability such as clogging when applying with a spray gun because of poor flowability and difficult casting such as casting.

FIG. 1 is an explanatory diagram when light 3 is incident on the pattern-forming resin particles 1. Glitter-like fine particles 2
Indicates that when the light 3 is incident on the pattern forming resin 1 from a certain direction, the reflected light 4 is reflected in a certain direction. FIG. 2 is a cross-sectional view of the vicinity of the surface of the resin molded product 6 of the present invention in which the pattern-forming resin particles 1 and the coloring pigment 7 are randomly dispersed and mixed in the matrix resin composition 5. When the light 3 enters from a certain direction, the reflected light 4 is reflected in various directions.

In the present invention, an organic or inorganic filler, an antioxidant, an ultraviolet absorber, a dispersant, a plasticizer, etc. may be added to the resin within the range not departing from the gist of the present invention.

[0012]

When the light 3 hits the pattern-forming resin particles 1 used in the present invention, the light reflection direction is constant, and the pattern-forming resin particles 1 are mixed in the resin composition 5 by a conventional method. When blended, the pattern-forming resin particles 1 are randomly dispersed in the matrix resin composition 5, so that the direction of the scaly fine particles 2 having glitter becomes random. Therefore,
It is considered that when you change the viewing angle, the reflected part changes and a crystal-like sparkle appears. In the present invention, a crystal-like glittering feeling is obtained even if the resin composition and the pattern-forming resin particles are not in a peeled state like a conventional resin molded article in which glass particles coated with a release agent are mixed in the resin composition. Get out. Since the adhesive strength between the resin composition 5 and the pattern forming resin particles 1 is high, the strength of the finished resin molded product is high. Further, since the pattern-forming resin particles 1 are a resin, they have good machinability and can be colored in any color by an ordinary method such as blending the coloring pigment 7.

[0013]

EXAMPLES The present invention will now be specifically described with reference to examples, but the present invention is not limited thereto. (Example) Pearl pigment 10 as scale-like fine particles having a brilliance for 100 g of an unsaturated polyester resin composition
After adding ˜20 g and stirring, centrifugal molding was performed to orient the pearl pigment substantially parallel to the centrifugal force. After heating and curing, it was mechanically pulverized to prepare pattern forming resin particles having an average particle diameter of 0.3 to 2.0 mm. The pattern forming resin particles 10 to
20 g was added to 100 g of the unsaturated polyester resin composition, stirred and mixed well, then cast and heat-cured to prepare a resin molded product of the present invention. This resin molded product had a crystal-like glittering feeling, high strength, and good machinability.

Comparative Example A pattern-forming resin particle was prepared in the same manner as in Example except that centrifugal molding was not carried out, and a resin molded product was prepared in the same manner as in Example. This resin molded product had high strength and good machinability, but did not have a crystal-like glittering feeling.

[0015]

EFFECTS OF THE INVENTION Scale-like fine particles having a specific average particle diameter are dispersed in a resin with orientation, and then cured or solidified, and then crushed to obtain pattern forming resin particles having a specific average particle diameter. The resin molded product of the present invention obtained by randomly blending in the resin composition has a crystal-like glittering feeling because the portion where light is reflected changes when the viewing angle is changed, resulting in vivid coloring. It also has good cutting workability and high strength.

[Brief description of drawings]

FIG. 1 is an explanatory diagram when light is incident on pattern forming resin particles.

FIG. 2 is a cross-sectional view of the vicinity of the surface of the resin molded product of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Resin particles for pattern formation 2 Scale-like fine particles having glitter 3 Light 4 Reflected light 5 Resin composition 6 Resin molded product of the present invention 7 Pigment for coloring

Claims (1)

[Claims] 1. An average particle size of 0.3 to 2.0 in the resin composition.
mm is a resin molded product containing resin particles for pattern formation, wherein the resin particles for pattern formation have an average particle diameter of 5 to 100 μm.
2. A resin molded product, characterized in that the scaly fine particles having the glittering property are dispersed and then dispersed, and then cured or solidified, and then crushed.