JP2691588B2 - Ceramic label - Google Patents

Description

FIELD OF THE INVENTION The present invention relates to ceramic labels, and more particularly,
The present invention relates to a ceramic label used as a display label used under high temperature conditions in industrial fields such as the ceramic industry, the metal industry, and electronic materials.

(Prior Art) A conventional label is one in which a rubber-based or acrylic-based pressure-sensitive adhesive layer is provided on a paper or film as a base material, and the heat-resistant temperature is less than about 200 ° C, which is poor in heat resistance. . Especially,
As a heat-resistant label, there is a polyamide film or polyimide film coated with a silicone adhesive,
This label also has a heat resistant temperature of 200 ℃ -300 ℃, 400 ℃
It could not meet the demands of industrial fields such as the ceramic industry, the metal industry, and the electronic materials where heat resistance of 1,000 to several hundreds of degrees Celsius is desired.

In addition, there is a ceramic label that is printed and sintered on a ceramic substrate, but since the label itself is sintered and hardened, it can not be attached to the adherend, and it is real time at the work site. However, there is a problem in that it cannot be printed.

In addition, there are labels that can be printed and printed with a label such as a bar code at the work site of applying a label using a raw ceramic substrate, but the substrate strength is weak, and it is a machine such as a manual attachment to an adherend or a labeling machine. Not only is it difficult to apply, but because it is adhered to the adherend due to the adhesion of the raw ceramic single layer itself, when sintered, the label will crack due to the difference in shrinkage ratio between the adherend and the label. Then, there was a problem that the label was dropped and the display body could not be identified.

(Object of the Invention) The present invention is to solve the problems of the above-mentioned conventional label, and to print on an adherend such as glass, ceramics, metal, etc. at room temperature in the same manner as a general label. While it can be hand-pasted or machine-pasted, it is firmly adhered to the adherend without cracks even at high temperatures, even after sintering and cooling, and the printed or printed display body does not deform,
It is intended to provide a ceramic label that can be accurately read.

(Structure of the Invention) In the ceramic label according to the present invention, one surface of a paper-like material (hereinafter referred to as ceramic paper) formed by binding ceramic fibers with a binder is used as a display surface, and oxide solder particles are provided on the other surface. It is characterized in that a mixed pressure-sensitive adhesive layer is applied.

A coating layer formed by adding an inorganic filler having at least one of sinterability and meltability to an organic polymer binder is preferably provided on the display surface. The display layer provided on the label is preferably provided by using an inorganic pigment as a color component.

(Operation) The ceramic label according to the present invention can be easily attached to the adherend at room temperature by the pressure-sensitive adhesive layer formed on one surface of the ceramic paper.

Ceramic paper is a non-woven fabric because it is made by binding ceramic fibers with a binder.
Therefore, since there is a certain amount of voids in advance, it is possible to follow the contraction of the adherend at high temperature, sintering and cooling. Therefore, no crack is generated.

Further, by sintering, the adhesive component in the adhesive layer is also gasified, burned and disappears, but the oxide solder particles are melted and sintered, resulting in strong adhesion to the adherend and the ceramic paper, The label is firmly adhered to the adherend.

(Example) Hereinafter, a ceramic label according to an example of the present invention will be described with reference to the accompanying drawings.

FIG. 1 is a sectional view of a ceramic label according to an embodiment of the present invention.

In FIG. 1, reference numeral 1 indicates a ceramic paper as a base material of the label.
Is sinterable or has shape retention even at a high temperature of 400 ° C. or more, and has voids at a constant ratio, and has a thickness of 50 to 3000 μm, preferably 100 to 1000 μm. As the ceramic fibers forming the ceramic paper 1, for example, alumina / silica fiber short fibers or the like can be used.

A coating layer 2 is formed on the surface of the ceramic paper 1. The coating layer 2 is for making the surface of the ceramic paper 1 smooth as a display surface because the surface of the ceramic paper 1 is rough and it is difficult to print directly. The coating layer 2 is made of acrylic resin, epoxy resin, phenol resin, alkyd resin, melamine resin, polyester resin,
A polymer binder such as polyethylene resin is mixed with an inorganic filler 3 such as glass, ceramic or metal oxide which is sintered or melted. Polymer binder
The inorganic filler 3 is mixed in a ratio of 5 to 100 parts by weight with respect to 100 parts by weight.

A display layer 4 is formed on the coating layer 2 by printing. Therefore, the coating layer 2 is
It is preferable that after being coated and formed to a thickness of 10 to 500 μm on the ceramic paper 1, the display is finished to a smooth surface by hot pressing or the like. The coating layer 2 may be colored by adding a pigment.

The display layer 4 is made of an ink containing an inorganic pigment as a main component. This inorganic pigment does not burn or gasify even at high temperatures, and when the coating layer 2 melts or sinters, the display layer 4 causes the coating layer 2 to
The display function is not impaired even in a high temperature state and after being further cooled.

On the other hand, on the back surface of the ceramic paper 1, glass,
A pressure-sensitive adhesive layer 5 capable of adhering a label at room temperature is formed on an adherend formed of ceramic, metal or the like. This pressure-sensitive adhesive layer 5 has a pressure-sensitive adhesive property that can act as an adhesive at room temperature, and contains PhO, ZnO in a pressure-sensitive adhesive that does not contain functional groups such as hydroxyl groups, carboxyl groups, and epoxy groups that react with metal ions. , B ₂ O _3, etc., with a melting point of about 300 ° C, Al ₂ O ₃ , CaO, MgO, ZrO ₂ , Y ₂ O ₃ , ThO
₂ 、 Si ₃ O ₄ , SiC, AlN etc.
It contains inorganic particles 6 called oxide solder containing a substance having a temperature exceeding 0 ° C. As described above, the adhesive having a functional group capable of reacting with a metal ion is not used because the oxide solder reacts with the functional group to cause a decrease in adhesive strength.

The inorganic particles 6, which are oxide solder, have an average particle size of 1 to 30.
The average particle size is about 5 μm. The addition amount of the inorganic particles 6 is 5 to 50 parts by weight with respect to 100 parts by weight of the adhesive. Thus, the pressure-sensitive adhesive to which the inorganic particles 6 which are the oxide solder are added is applied to the back surface of the ceramic paper 1 in a thickness of 10 to 50 μm to form the pressure-sensitive adhesive layer 5.

In the figure, reference numeral 7 is a release paper having a release agent layer 8 temporarily attached to protect the pressure-sensitive adhesive layer before applying the label.

The ceramic label described above is adhered to the adherend B by the action of the adhesive layer 5 as shown in FIG. 2 in a state where the release paper 7 is peeled off, and in this state, it is subjected to high temperature treatment in the furnace. It

Before the label is exposed to a high temperature, the surface of the sinterable or fusible coating layer 2 using an organic polymer as a binder is smooth due to the characteristics of the organic polymer and the above-mentioned press treatment, and printing / printing Easy to print. Once exposed to a high temperature, the organic polymer in the coating layer 2 gasifies or burns and disappears, but the inorganic filler 3 remains on the ceramic paper 1 and sinters or melts at a predetermined temperature or higher. . At this time, the display layer 4 containing the inorganic pigment as a main component on the surface of the coating layer 2 is integrated with the inorganic filler 3 of the coating layer 2, and the applied display pattern is fixed.

The coating layer 2 that has been sintered or melted is cooled in the next step, but at this time, volume contraction occurs. However, since the coating layer 2 is retained and bonded on the ceramic paper 1, no crack is generated due to the shrinkage of the ceramic paper 1 itself and the buffering action of the voids of the ceramic paper.

On the other hand, the pressure-sensitive adhesive layer 5 provided on the back surface of the ceramic paper 1 is gasified or burned at a high temperature.
However, the added inorganic particles 6 which are the oxide solder are melted at a predetermined high temperature or more and firmly adhered to the adherend B and the ceramic paper 1, and the label is adhered to the adherend B. It will be in a state of being. After that, when cooled, both the adherend B and the ceramic paper 1 shrink,
The adherend 9 and the ceramic paper 1 are partially adhered by the oxide solder particles, and cracks may occur or the label may be peeled off due to the buffering function of the voids of the ceramic paper 1 described above. Absent.

 The state of the label after sintering is shown in FIG.

(Experimental Example) In order to confirm the effect of the ceramic label of the present invention, a sample was prepared as described below.

Ceramic paper with a thickness of 150 μm (Kojin Co., Ltd.,
Apply coating agent (Ceramic Color C from Toka Dye Chemical Industry Co., Ltd.) to product name Corselan, and dry it.
A coating layer having a thickness of 50 μm was formed.

In the adhesive having no reactivity with metal ions mainly composed of acrylic butyl, as oxide solder particles, glass solder GSP220 manufactured by Toshiba Glass Co., Ltd., was added 20 parts by weight to 100 parts by weight of the adhesive, This was applied to the other surface of the ceramic paper to form a pressure-sensitive adhesive layer having a thickness of 25 μm.

Using a thermal transfer ribbon having a metal oxide (iron, manganese, etc.) as a pigment component as an inorganic pigment on the coating layer of the label formed as described above, a barcode is printed to form a display layer, and A ceramic label was created.

This ceramic label is affixed to glass, ceramic, and metal adherends, baked at 600 ° C for 1 hour in an electric furnace,
After cooling at room temperature, the label was observed. As a result, the label had no cracks and did not fall off, and the barcode of the display layer could be read by a barcode reader.

(Effect of the invention) Since the ceramic label of the present invention has the above-mentioned constitution, in the normal state before sintering, it can be attached by hand,
It has the rigidity to allow mechanical pasting, printing can be done at the work site, and even after sintering, it does not crack or fall off from the adherend, and it is in a desirable state. It is fixed to the adherend.

[Brief description of the drawings]

FIG. 1 is a sectional view of a ceramic label according to an embodiment of the present invention, FIG. 2 is a sectional view showing a state in which the ceramic label shown in FIG. 1 is adhered to an adherend, and FIG. It is sectional drawing which shows the attachment state of the label after that to an adherend. 1 ... Ceramic paper 2 ... Coating layer 4 ... Display layer 5 ... Adhesive layer 6 ... Inorganic particles that are oxide solders

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Claims (3)

(57) [Claims] 1. A paper-like material obtained by binding ceramic fibers with a binder, wherein one surface is used as a display surface, and the other surface is provided with a pressure-sensitive adhesive layer mixed with oxide solder particles. Ceramic label to do. 2. A coating layer formed by adding an inorganic filler having at least one of sinterability and meltability to an organic polymer binder on the display surface. The ceramic label according to item 1. 3. The ceramic label according to claim 2, wherein a display layer containing an inorganic pigment as a color component is provided on the coating layer.