JPH05177803A - Artificial stone having multi-layer structure - Google Patents

Abstract

PURPOSE:To provide artificial stone which can contrive diversification of a color tone and possesses excellent gloss, by a method wherein a kind of a pigment to be added to a base layer and that to be added to a colored flake are caused to be changed. CONSTITUTION:A glossy layer H comprised by compounding a colored flake 1 obtained by sticking a pigment to the surface of an inorganic or organic and semitransparent flake with transparent synthetic resin 2 is formed on the surface of a base layer F comprised by mixing an inorganic and/or organic filler 3 into synthetic resin 4. With this construction, incident light through a surface side is reflected complicatedly by the colored flake 1 of the glossy layer H and an external appearance having delicate and excellent gloss is indicated. Then, since the colored flake 1 is in existence into the glossy layer H only, it is free from a part coming to nothing and cheapening of a raw material cost can be contrived.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an artificial stone formed by mixing various kinds of fillers in a synthetic resin and curing the synthetic resin, and has a diversified appearance.

[0002]

2. Description of the Related Art Artificial stone is widely used as a material for bathtubs and counters as a substitute for expensive natural stone. Conventionally well-known artificial stones are mixed with synthetic resins such as unsaturated polyester, aluminum hydroxide, calcium carbonate, crushed particles of natural stone, inorganic fillers such as glassy fillers, and organic fillers such as resin crushed pieces. The above composition is cured, and a pigment is added if necessary, and a transparent gel coat layer is formed on the surface of the composition, if desired.

When manufacturing an artificial stone having a surface gloss,
Mica crushed pieces are selected as the filler. As shown in FIG. 2, the artificial stone B mixed with the mica crushed pieces 10 has a glossy appearance because the incident light α transmitted through the gel coat layer G on the surface is reflected by the mica crushed pieces 10.

[0004]

By the way, since the mica fragment 10 mixed to obtain the surface gloss is semitransparent, a part of the incident light α is transmitted and the reflected light β is transmitted.
However, there is a drawback that a sufficient gloss cannot be obtained as a result. Further, the mica fragments 10 are present in a dispersed manner as a whole, but there is no need for the presence of the mica fragments 10 in the area where the light does not reach from the surface to the back side.
It can be said that there is waste.

[0005]

DISCLOSURE OF THE INVENTION The object of the present invention is to provide an artificial stone having a high light reflectance and exhibiting various lusters.
Alternatively, a base layer formed by mixing an organic filler into a synthetic resin, and a colored flake in which a pigment is attached to the surface of an inorganic or organic translucent flake formed on the surface thereof is mixed with a transparent synthetic resin. It has a gloss layer.

[0006]

The artificial stone according to the present invention has a gloss layer formed by mixing colored flakes with a transparent synthetic resin on the surface of a base layer in which a filler is mixed in a synthetic resin. Due to its low transmittance, most of the incident light is reflected here, resulting in excellent gloss. Moreover, not all of the incident light is reflected by the gloss layer, but passes through the gloss layer to reach the base layer, and after being reflected by this base layer,
There is also a component that reflects through a complicated path, in which the colored flakes of the glossy layer are diffusely reflected and emitted. Therefore, the artificial stone of the present invention has a complicated and delicate appearance in which the reflected light directly reflected by the colored flakes of the former is mixed with the reflected light reflected through the complicated reflection path of the latter. It is a manifestation. It is possible to diversify the color tone to be exhibited by changing the color tone of the colored flakes by changing the type of pigment attached to the semitransparent flakes.

[0007]

EXAMPLES Details of the present invention will be described based on examples.
FIG. 1 conceptually shows the structure of an artificial stone A according to the present invention, and the artificial stone A of this example has a three-layer structure including a base layer F, a gloss layer H and a gel coat layer G. There is.

The base layer F is formed by mixing a filler 3 such as aluminum hydroxide in an unsaturated polyester resin 4 and adding a pigment as desired. The gloss layer H formed on the surface of the base layer F is a mixture of the transparent synthetic resin 2 and the colored flakes 1, and the colored flakes 1 are formed by baking the pigment on the surface of the mica crushed pieces at a high temperature. Things are used. Further, the gel coat layer G formed on the surface is for protecting and coating the gloss layer H,
Generally, the thickness is formed thin.

As the colored flakes 1, it is possible to use those in which pigments are baked on the surface of crushed mica pieces at high temperature, those in which glass flakes are colored or those in which translucent synthetic resin flakes are colored.

The colored flakes 1 composed of crushed mica fragments having a pigment burned on the surface thereof have a lower light transmittance than semi-transparent flakes such as uncolored crushed mica fragments. That is, since most of the incident light α functions as the reflected light β, the gloss is increased accordingly. Moreover, as shown in FIG. 1, most of the light incident from the surface side is reflected, but part of the light is transmitted through the gloss layer H and reflected at the boundary surface with the base layer F, and then the colored flakes 1 It is emitted to the outside while being diffusely reflected by. like this,
Since there is a light component reflected through a complicated path, the artificial stone A according to the present invention has a complicated and delicate appearance. Moreover, by changing the types of the pigment added to the base layer F and the pigment coloring the crushed mica fragments, it is possible to diversify the color tone to be exhibited, and thus it is easy to obtain a more varied product.

In the artificial stone according to the present invention, the colored flakes 1 are mixed only in the gloss layer H, and the region where the incident light α hardly reaches is the base layer F in which the colored flakes 1 are not mixed. There is no part where 1 is useless. Therefore, the raw material cost can be reduced.

The embodiment of the artificial stone according to the present invention does not prevent appropriate modifications other than the above. Although the gel coat layer G is formed on the surface in the embodiment of FIG. 1, the gel coat layer G is not always necessary and can be omitted depending on the purpose of use. In addition, the types of synthetic resin, which is the main composition of artificial stone, and the types of fillers and colored flakes mixed therein, are optimally selected according to the embodiment. It is also possible to mix the colored flakes 1 in the gloss layer H together with semi-transparent flakes such as uncolored mica crushed pieces.

[0013]

As is apparent from the above description,
According to the present invention, by forming the glossy layer containing the colored flakes on the surface of the base layer, it is possible to manufacture an artificial stone having a higher light reflectance than that of the conventional art and having an excellent gloss. The light reflected by the glossy layer has a component that is diffusely reflected through a complicated path, and thus has a subtle appearance. Moreover, by appropriately selecting the type of pigment to be added to the base layer and the pigment used to form the colored flakes, it is possible to obtain the effect that the color tone can be diversified. Furthermore, since the colored flakes are mixed only in the glossy layer, there is no wasteful portion as in the conventional case, so that the raw material cost can be reduced.

[Brief description of drawings]

FIG. 1 is an enlarged cross-sectional view conceptually showing an embodiment of a multi-layered artificial stone according to the present invention.

FIG. 2 is an enlarged sectional view conceptually showing the structure of a conventional artificial stone.

[Explanation of symbols]

A ... Artificial stone F ... Base layer G ... Gel coat layer H ... Gloss layer 1 ... Colored flake 2 ... Transparent synthetic resin 3 ... Filler 4 ... Synthetic resin α ... Incident light β ... Reflected light

Claims (1)

[Claims] 1. A base layer formed by mixing an inorganic and / or organic filler into a synthetic resin, and a colored flake in which a pigment is attached to the surface of an inorganic or organic translucent flake formed on the surface of the base layer. An artificial stone having a multi-layered structure, which has a gloss layer formed by mixing with a transparent synthetic resin.