JPH01281931A - Thermally discoloring stainless steel - Google Patents

Abstract

PURPOSE:To obtain the thermally discoloring stainless steel by a method in which the film containing a thermally discoloring material is formed on the surface of the stainless steel, and transparent or semiopaque film is provided on said surface, and further said stainless steel is provided with a heating element or a heat absorber. CONSTITUTION:A pattern is drawn on the surface of the mirror surface-grinding finished material of SUS 430 with the thermally discoloring paint which is liquidized by dissolving the colorant changing malachite green into electron donor-organic compound, into alcohol. Next on said front surface is clearly coated with transparent fluoroplastic, and an insulating sheet is stuck to said rear surface, and then the cotton cloth in which conductive carbon is dispersed and to which an electrode is attached, is stuck onto said sheet, and further the facelike heating element on which an insulating sheet is stuck, is fitted on said cloth. The front surface of the obtained material shows a mirror surface at -10-20 deg.C, and the drawn pattern appears at 30-50 deg.C. Thus, the thermally discoloringstainless steel which may change its color or pattern in response to atmosphere temperature or may show desired shape or color, may be obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to thermochromic stainless steel with a film formed on its surface, which is primarily used as a building material.

<Prior Art> In recent years, various types of stainless steel have been used for building materials, etc., and one of their characteristics is their excellent workability, corrosion resistance, and appearance.

In particular, with the advent of colored stainless steel, its use as a highly decorative material has expanded.

Colored stainless steel includes those that have an opaque color coating that is not visible from the outside due to the surface condition of the underlying stainless steel.
Some products have a transparent or semi-transparent film, and the film itself is color-forming, while others have no color-forming property and produce color through light interference, but in either case, once the film has been formed, However, there has been no way to change the color of the film other than through discoloration due to aging or intentional deterioration due to exposure to ultraviolet rays.

<Problem to be solved by the invention> As mentioned above, once various types of stainless steel and colored stainless steel are used as building materials, the color and pattern of the exterior cannot be changed unless the panel is replaced, and gradually This had the problem that it lost its freshness and became obsolete.

The present invention is a thermochromic stainless steel whose film color changes without impairing the characteristics of stainless steel, such as changing colors and patterns depending on the outside temperature and displaying desired dates and times in desired shapes and colors. is intended to provide.

Means for Solving the Problems> In order to achieve the above object, the present invention provides a thermochromic stainless steel in which a film containing a thermochromic material is formed on the surface of the stainless steel.

Further, according to the present invention, there is provided a thermochromic stainless steel which has a thermochromic material on the surface of the stainless steel and forms a transparent or translucent film on the surface.

Preferably, the stainless steel is provided with a heat generating element or a heat absorbing element.

The present invention will be explained in more detail below.

The stainless steel that serves as the substrate used in the present invention is not particularly limited, and various stainless steels and various colored stainless steels (chemically colored stainless steels, those having a colored translucent film, etc.) can be used. Additionally, those surface treatment materials can also be used.

The color of the colored stainless steel and its surface treatment material is not particularly limited, but bright colors such as white, yellow, silver, and gold are preferred.

The thermochromic material used in the present invention is not particularly limited, and the range of color change is also not particularly limited, but materials that change color or develop color in the natural environmental temperature range (-60 to +70°C) are preferred.

The shape of the thermochromic material can be selected depending on the purpose, such as liquid, powder, granule, capsule, rod, or plate shape.

The thermochromic material is not particularly limited, but can be arbitrarily selected from various electron-donating color-forming organic compounds depending on the purpose, and materials to which metal salts of various dilute acids, etc. are added may also be used. I can do it.

A film containing a thermochromic material used in the present invention (in this case, in order to take advantage of the color and gloss pattern of the stainless steel substrate, it is preferable to choose a transparent or translucent film), or a thermochromic material The transparent or translucent film to be formed on the coated surface is not particularly limited, and may be made of various synthetic resins such as fluororesin, silicone (modified) polyester, polyester acrylic, vinyl chloride, glass, and other thin films. can be mentioned. The film is not limited to a single layer, and may be two or more layers. In addition, in the case of a transparent or translucent film, the film thickness is preferably 10 to 20 μm in order to maintain transparency.

Furthermore, there may be partially transparent, semitransparent, or opaque portions.

There is no particular limitation on the method of pre-priming the stainless steel surface, and it may be BA (bright annealing) material or HL (hairline processing) material, which is a normal stainless steel surface, and these may be further subjected to chemical coloring treatment, plating treatment, or etching treatment. ,
Alternatively, it may be embossed.

The location where the heating element or heat absorbing element is attached is not particularly limited, and it can be embedded in a film containing a thermochromic material, or mounted on the surface of the film or the back or outer surface of the substrate.

The heating element can be, for example, a planar heating element made by uniformly dispersing fine particles of conductive carbon in a cotton woven cloth and protected by an insulating sheet, and the heat absorbing element can be, for example, a sheet made of thin pipes arranged uniformly. Examples include planar heat absorbers that allow refrigerant to flow therethrough, but are not limited to these.

Next, one example of the method for manufacturing thermochromic stainless steel of the present invention will be described.

Depending on the purpose of use, for example, a desired thermochromic material may be applied to the surface of a stainless steel veneer or coil that has been subjected to electrolysis, pickling, chemical coloring, HL processing (hairline processing), mirror polishing, etc., or a stainless steel veneer or coil that has not been subjected to the above surface treatment. After coating, a transparent or translucent film is formed on the surface, or a thermochromic material mixed in advance with a transparent, translucent or opaque film-forming material is coated.

If the thermochromic stainless steel thus obtained is used for building materials, etc., it is possible to create walls that change colors to suit each of the four seasons in response to changes in outside temperature. Similarly, the desired color, shape, and characters can be changed by changes in indoor temperature, day/night temperature changes, and even the operation of heat generating elements and heat absorbing elements. Furthermore, it is also possible to change the wall surface at any time, or to change patterns, pictures, letters, etc. continuously.

<Example> The present invention will be explained in detail below based on examples.

(Example 1) After drawing a pattern on the surface of a SUS430 mirror-polished material with a thermochromic paint made by dissolving a coloring material containing malachite green as an electron-donating organic compound in alcohol and turning it into a liquid, a transparent coating was applied to the surface. Nigarnet 930 on fluororesin
) is clear coated, an insulating sheet is pasted on the back side, and on top of that, numbered electrodes are pasted on a woven wood cloth with conductive carphone dispersed therein, and then an insulating sheet is pasted on top of that. I put on the body. The surface of the obtained material is -10 to 2
At 0°C, a mirror surface appeared, and at 30 to 50°C, a painted pattern appeared.

(Example 2) As a thermochromic Hamura on the surface of SUS304 chemically colored steel (gold), Nigarnet 930) was used as a transparent fluororesin paint mixed with electron-donating coloring organic compound powder of fluoran-based leuco compound. A uniformly painted panel was created. This panel is usually green, but 60-8
When the temperature exceeded 0°C, the color changed to gold.

<Effects of the Invention> Since the present invention is configured as described above, thermal discoloration in which colors, patterns, characters, etc. change as the surface or surrounding temperature changes or is forcibly changed. It is possible to obtain stainless steel, enrich the social or living environment, and have the effect of being useful for mental health, disaster prevention, etc.

Procedural proceedings (spontaneous) 1 Indication of the case Patent Application No. 111122 of 1988 2 Name of the invention Thermochromic stainless steel 3 Relationship to the case of the person making the amendment Name of the patent applicant Title (125) Kawasaki Steel Corporation 4 Agent Person 〒1
01 Telephone: 864-4498 Address: 3-2-2 Iwaki-cho, Chiyoda-ku, Tokyo Ministry of Specification Column 6 of "Detailed Description of the Invention" Contents of Amendment (1) Page 8 of the Specification, Lines 7 and 8 Page 19th line to 2nd line
Correct line 0, "New Garnet 930)J" to "New Garnet)".

Claims (3)

[Claims] (1) Thermochromic stainless steel made by forming a film containing a thermochromic material on the surface of stainless steel. (2) Thermochromic stainless steel having a thermochromic material on the surface of the stainless steel and forming a transparent or translucent film on the surface. (3) The thermochromic stainless steel according to claim 1 or 2, wherein the stainless steel is provided with a heat generating element or a heat absorbing element.