JPH0410032Y2 - - Google Patents

Description

[Detailed explanation of the idea]

This invention relates to a colored synthetic resin laminate, particularly a colored synthetic resin laminate exhibiting a light chromatic color, which is mainly used for substrates such as signboards, display boards, decorative materials for stores, and the like. In the above-mentioned applications, synthetic resin laminates in pale yellow, pale blue-green, pale pink colors, etc. are relatively often used. Conventionally, such light-colored synthetic resin board materials are generally manufactured by laminating multiple synthetic resin sheets into one piece to obtain the required thickness due to the ease of manufacturing and the advantage of having a smooth finish on the surface. The formed ones are often used. Of course, such laminates can be either translucent or non-transparent, depending on the purpose, and can be selected arbitrarily, but in general, non-transparent colored plates contain resin in the resin. Due to the relatively large amount of filler such as titanium oxide that is added and contained, there is a drawback that the object color, that is, the surface color due to reflection, is less sharp. On the other hand, translucent colored plates can express vivid colors in the transmitted color, but because they have the property of transmitting light rays, the original color tone of the coloring material can be clearly seen in the reflective color. The problem is that it cannot be reproduced. Therefore, when these colored synthetic resin laminates are used for signboards, display board substrates, store decoration materials, etc., there are other problems such as visibility,
There was a problem of lack of decorativeness, and there was a need to provide a synthetic resin plate material that had a pale surface color but was clear and had an excellent appearance. Based on the background of the prior art as described above, the inventor of the present invention aimed to provide a colored synthetic resin plate whose reflective surface color can make the reflective surface color look even more beautiful to the observer within a range of pale color tones. For this purpose, we conducted various experiments and research. As one method for this experiment and research, the present inventor prepared a wide variety of colored synthetic resin sheets, layered them in various combinations, and investigated the state of surface color change and actual observation with the naked eye. This was done by carefully analyzing data such as the appearance impression of the color tone, and as a result, we succeeded in obtaining one noteworthy and useful finding. That is, when a colored synthetic resin sheet is laminated on a white plate, the hue of the colored sheet can be reproduced with high purity without any change in the surface color due to the reflective surface, and moreover, the total light transmission of the colored synthetic resin sheet is By selecting the ratio, brightness, and saturation within specific ranges, we can create a slightly deeper color that approximates the surface color of pale glazed tiles, in other words, the reflected color appears slightly sunken from the surface. It has been discovered that it is possible to create a pale yet clear color tone (hereinafter simply referred to as ceramic-like color tone) that creates a calming atmosphere as if it were made from a ceramic material. This invention was completed based on the above knowledge, and basically consists of laminating and integrating a translucent colored synthetic resin sheet on at least one side of a white board. , and also as the above-mentioned colored synthetic resin sheet, especially the total light transmittance of 55
% or more, chroma adjusted to a range of 1.5 to 4.0, and lightness adjusted to a range of 3.5 to 6.0. In addition, the brightness and chroma in this specification are based on JIS
- Based on the measurement method that complies with condition a stipulated in Z-8722 (however, the backing material is black felt), the product name is "SM Color Computer",
The figures show numerical values measured using model SM-3-CH (manufactured by Suga Test Instruments Co., Ltd.). In the embodiment shown in the attached drawings, 1 is a white plate, and 2 is a colored synthetic resin sheet that is laminated and integrated on one side of this plate by heating and pressing, and both are made of, for example, vinyl chloride resin, acrylonitrile-butadiene-styrene copolymer. It is made of thermoplastic synthetic resin such as methyl methacrylate resin. However, the colored synthetic resin sheets 2 may be of different colors or with different surface ridges, etc., and may be laminated and integrated on both sides of a white plate. By the way, the white plate 1 generally has a thickness of 0.5 to
A plate with a diameter of about 2.0 mm is used, and a slightly translucent milky white plate may be used, but preferably an opaque plate with a Lab brightness of W80 or higher should be used. That is, when the whiteness W is less than 80 or has high translucency,
The surface color of the colored synthetic resin sheet 2 is affected by the ground color, making it impossible to obtain a highly pure color tone. On the other hand, the colored synthetic resin sheet 2 generally has a thickness of
A material with a diameter of about 0.1 to 1.0 mm is used,
The total light transmittance is limited to 55% or more because
If it is less than 55%, the surface color tends to increase in blackness and become darker, making it impossible to express a pale and even ceramic-like color tone. In addition, the brightness of the colored synthetic resin sheet 2 is
If the brightness is less than 3.5 and the saturation is less than 1.5, the surface color will have a blackish tinge. Conversely, if the brightness is over 6.0 and the saturation is more than 4.0, the surface color will have a whiter tinge.
In either case, it is not possible to obtain a laminate having a light, clear ceramic-like surface color as described above. According to this invention, as described above, it is possible to provide a synthetic resin laminate having a light surface color and a bright ceramic-like color tone. Therefore, this is a signboard,
When used for substrates such as display boards, decorative materials for stores, etc., it is more beautiful and easier to see than conventional synthetic resin boards.
It can be made highly decorative. Next, an example of this invention will be shown. Example [Composition of colored synthetic resin sheet] Vinyl chloride resin 100 parts by weight Tin-based stabilizer 3 parts by weight Lubricant 0.5 parts by weight Calcium carbonate 2.5 to 0.25 parts by weight Titanium oxide 0.013 to 0.175 parts by weight Organic pigment See Table 1 According to the above formulation , the thickness was kept constant at 0.5 mm, and the amount of coloring material (organic pigment) was varied to create various hues, total light transmittances, brightness, and chroma as shown in Table 1 below. A synthetic resin sheet was produced. Each of these colored synthetic resin sheets was then integrated by heating and pressing on one side of a white plate made of vinyl chloride resin with a Lab brightness of W91.5 to obtain samples of various colored synthetic resin laminates.

[Table] For each sample obtained above, the brightness and saturation of the surface color were measured, and the results were visually observed by 10 observers, and the results were observed from the transparent and light colored glazed tiles. Using the corresponding hue of the ceramic-like sensation as a reference, the approximation was determined by comparing with this. The second result is
Shown in the table. In addition, in this evaluation, the color tone that all 10 people evaluated as being extremely similar to the standard color tone above is marked with ○, and the color tone that was evaluated as somewhat similar is marked with △, and the color tone is slightly different. Those evaluated as exhibiting a different texture are marked with an x mark.

【table】

[Table] As is clear from the results in the above table, there is not necessarily a fixed relative relationship between the brightness and saturation of the surface color of a colored synthetic resin laminate and the evaluation by naked eye observation. It has been confirmed that all laminates using colored synthetic resin sheets that satisfy the following limiting condition range can exhibit a surface color with a clear ceramic-like tone.

[Brief explanation of the drawing]

The drawing is a sectional view of a colored synthetic resin laminate according to this invention. 1... White board, 2... Colored synthetic resin sheet.

Claims (1)

[Scope of claims for utility model registration] (1) At least one side of the white plate has a total light transmittance of 55
A colored synthetic resin laminate, characterized in that colored synthetic resin sheets prepared to have a brightness of 3.5 to 6.0 and a chroma of 1.5 to 4.0 are integrally laminated. (2) The colored synthetic resin laminate according to claim 1, wherein the white plate is an opaque plate having a Lab brightness (W) of 80 or more.