JPH05333780A - Sheet for forming pattern and label for baking - Google Patents

Abstract

PURPOSE:To obtain the sheet for forming patterns and the label for baking which can be efficiently subjected to a baking treatment at a high heating up rate without generating a baking defect, such as cracking and foaming, can bake and fix the baked patterns having excellent heat resistance, durability, chemical resistance, etc., to an adherend and can form the fine patterns in a good state as well. CONSTITUTION:This sheet 2 for forming patterns is formed by superposing layers 21, 22 constituted by holding the shape of ceramic powder to a sheet form by org. binders in >=2 layers in the combination varying in the contents of the org. binders. This label for baking has the patterns 1 consisting of heat resistant ink on the side 21 of the layer where the content of the org. binder is low of such sheet for forming the patterns.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pattern forming sheet and a baking label suitable for applying a baking pattern such as an identification label to an adherend which can be baked efficiently and in a good condition at a high temperature rising rate. Regarding

[0002]

2. Description of the Related Art With the transition of production system to high-mix low-volume production, we provide labels with excellent durability and heat resistance, which are used to manage products such as metal, glass or fired ceramics, semi-finished products or parts. Is an important issue.

Conventionally, as a pattern forming sheet or a firing label for forming a firing pattern by firing, there is known a sheet in which a glass powder is shaped by an organic binder and a pattern is imparted with an ink containing the glass powder. Was there. According to this, the baking pattern can be adhered to the adherend under the baking treatment with flexibility and flexibility of label formation, and the formed pattern is excellent in weather resistance, heat resistance and chemical resistance.

Therefore, according to the pattern forming sheet or the firing label of this type, it is necessary to fix screws such as screws, which are present in the board type labels made of fired ceramics, metals, enamel and the like. Easy lack of stickiness, lack of curved stickiness due to rigidity, lack of flexibility in label formation due to difficulty of patterning on site, or management of individual parts under high-mix low-volume production system It is possible to overcome problems such as lack of formability of a wide variety of labels required for.

However, in the conventional pattern forming sheet or firing label described above, the firing efficiency,
Further, if the firing process is performed at a high temperature rising rate in order to increase the efficiency of forming the firing pattern, there is a problem that firing defects such as cracks and foaming occur in the pattern forming sheet. Such firing failure not only impairs the appearance of the obtained firing pattern, but also causes a fatal problem such as misinterpretation in the case of a barcode pattern or the like, and makes it difficult to form a fine pattern.

[0006]

DISCLOSURE OF THE INVENTION According to the present invention, a firing pattern which can be efficiently subjected to a firing process at a high temperature rising rate without the occurrence of firing defects such as cracks and foaming, and is excellent in heat resistance and durability. It is an object of the present invention to develop a pattern-forming sheet or a label for baking, which can be adhered to an adherend by baking and can form a fine pattern in a good state.

[0007]

The present invention is characterized in that two or more layers of ceramic powder, which are formed into a sheet by an organic binder, are superposed in a combination of different contents of the organic binder. The present invention provides a pattern forming sheet, and a baking label characterized by having a pattern made of a heat resistant ink on the low content layer side of the organic binder in the pattern forming sheet.

[0008]

The pattern-forming sheet having the above-mentioned structure has flexibility and good adhesion to curved surfaces, and can be used for patterning or identifying forms by an engraving method, a punching method, an appropriate printing method such as a thermal transfer printer or screen printing, etc. Can be granted. On the other hand, by firing, it can be turned into a fired body while preserving the applied pattern or form, and can be fired and fixed while being temporarily attached to the adherend. In that case, since the pattern forming sheet is composed of a layer in which the layers having different contents of the organic binder are laminated, the organic binder can be thermally decomposed smoothly, and cracks or foaming can occur even if the baking process is performed at a high heating rate. It can be fired without causing firing defects such as. Therefore,
By applying a heat resistant ink pattern to the organic binder low content layer side of the pattern forming sheet, it is possible to form a baked pattern in a good state with excellent heat resistance, weather resistance, chemical resistance, etc. Automatic interpretation and the like can be smoothly performed.

[0009]

EXAMPLE FIG. 1 illustrates the firing label of the present invention. 1
Is a pattern layer, 2 is a layer 21 having a low content of organic binder
And a pattern forming sheet having a two-layer structure of a high layer 22. In addition, 3 is an adhesive layer and 4 is an adherend.

The pattern-forming sheet is formed by stacking two or more layers, which are formed by holding one or more kinds of ceramic powder in a sheet form with an organic binder, in a combination having different contents of the organic binder. Become. As the ceramic powder, one that is adhered to the adherend by softening or melting at a melting temperature or decomposition temperature of the adherend or lower is used. Generally, glass powder or ceramic powder that vitrifies during the firing process is used. As the glass powder, a lead glass type, a lead borosilicate glass type, a borosilicate glass type, or a soda glass type that softens or melts at 400 to 1000 ° C. is preferably used.

The pattern forming sheet may contain a fired body forming component other than the ceramic powder. Such a fired body-forming component is softened during firing of the pattern forming sheet,
Or, it is incorporated into the molten ceramic powder to form a fired body. As the calcined body-forming component other than the ceramic powder, for example, an inorganic powder or fiber made of a different ceramic having a melting point equal to or higher than the calcining temperature, a metal or an alloy, or an oxide thereof is generally used. Particle size is 0.1-20
It is suitable to use, but is not limited to, a powder of μm, a fiber having the same diameter and a length of 100 μm or less.

The kind and combination of the components to be blended may be appropriately determined. From the viewpoint of coloring, it is suitable to use an inorganic colorant composed of a pigment or a filler. Examples thereof include silica, calcium carbonate, titanium oxide, zinc white, zirconia, calcium oxide, alumina, and white compounds such as carbonates, nitrates, and metal compounds such as sulfates that are oxidized at the firing temperature or lower to form such oxides. Can be given.

Further, for example, red substances such as manganese oxide / alumina, chromium oxide / tin oxide, iron oxide, cadmium sulfide / selenium sulfide, etc. containing metal ions such as iron, copper, gold, chromium and selenium, manganese, cobalt, Copper, iron, etc. containing metal ions, for example, cobalt oxide, zirconia / vanadium oxide, chromium oxide / divanadium pentoxide, blue products, etc.
Examples thereof include black oxides such as chromium oxide, cobalt oxide, iron oxide, manganese oxide, chromate salts and permanganate salts, which contain metal ions such as iron, copper, manganese, chromium and cobalt.

Further, vanadium, tin, zirconium,
Contains metal ions such as chromium, titanium, antimony, such as zirconium, silicon, praseodymium, vanadium
Yellow materials such as tin, chrome, titanium, antimony, chrome,
Contains a metal ion such as aluminum, cobalt, calcium, etc., for example, a green material such as chromium oxide, cobalt chromium, alumina chromium, etc., contains a metal ion such as iron, silicon, zirconium, aluminum, manganese, such as aluminum manganese, iron・ Pink colored materials such as silicon and zirconium are also included.

On the other hand, flaky powder obtained by coating flakes such as mica powder having a size of 5 to 200 μm and a thickness of about 1/50 to 1/100 times thereof with an oxide type ceramic-based compound is other than ceramic powder. It can be used as a calcined body forming component. The coating form is generally one in which powder of an oxide-type ceramic compound is adhered to the flakes, and in particular about 20% or less of the flakes. The size of the powder of the oxide-type ceramic compound to be adhered is usually 1 μm or less, though it depends on the size of the flakes of the adherent base.

As the oxide type ceramic compound for coating the flakes, an appropriate one is used according to the intended color. Incidentally, for example, zirconia, titania, alumina or the like is used for coloring in white, and iron oxide or the like is used for coloring in red.

The amount of the fired body-forming component other than the ceramic powder used depends on the abrasion resistance, durability, chemical resistance, adhesion to the adherend, etc. of the fired layer to be formed.
150 parts by weight or less, especially 2-45 parts by weight, are suitable per 00 parts by weight.

As the organic binder, one that disappears by being thermally decomposed during firing is used, and one that is excellent in shape retention and flexibility imparting property is preferably used. Examples of organic binders that can be preferably used are hydrocarbon-based resins, vinyl-based or styrene-based resins, acetal-based resins, butyral-based resins, acrylic-based resins, polyester-based resins,
Examples include urethane resin and fibrin resin. Hydrocarbon resins, acetal resins, acrylic resins, fibrin resins, and acrylic resins, among others, are preferable from the viewpoint of burnt-off property during baking.

The pattern forming sheet is formed by, for example, 1
One or two or more calcined body-forming components and an organic binder are mixed with an organic solvent or the like in a ball mill or the like, and the mixed solution is spread on a supporting substrate such as a separator by an appropriate method and dried. , A new spreading layer is formed on top of it by using a mixed solution having a different content of the organic binder to form two layers or three layers.
A method of forming a structure of two or more layers, a method of laminating a development layer formed by using a mixed solution having different contents of organic binders by sequentially thermocompression bonding, and forming a laminated body of two or more layers can be performed. it can. The development method is preferably a method having excellent layer thickness controllability, such as a doctor blade method. It is preferable to perform a sufficient defoaming treatment so that air bubbles do not remain in the spreading layer by using an antifoaming agent together.

As described above, the organic binder is used in such an amount that two or more layers having different contents are formed, and is appropriately determined according to the specific gravity and particle size of the ceramic powder used together. Generally, based on the layer containing a large amount of organic binder, 5 to 10 per 100 parts by weight of ceramic powder is used.
0 parts by weight, especially 15 to 50 parts by weight are used.

The difference in the content of the organic binder applied to each layer forming the superposed layer differs depending on the number of layers, but is usually 2% by weight.
Above all, it is 5% by weight or more. It is preferable from the viewpoint of preventing the occurrence of cracks and foaming that the layer having the highest content of the organic binder and the layer having the lowest content of the organic binder have a difference of 10% by weight or more.

Each layer forming the superposed layer is usually formed of the same material except that the content of the organic binder is different from the viewpoint of the firing processability and the like, but even if they are formed of different materials. Good. In addition, the superposed layer usually has a layered structure in which the content of the organic binder is gradually lowered (increased) in the vertical direction, but is not limited thereto.

The thickness of each layer forming the superposed layer may be appropriately determined according to the purpose of use, and is generally 5 to 500 μm,
Especially, it is 10 to 100 μm. Therefore, the thickness of the pattern forming sheet is appropriately determined depending on the thickness of each layer forming the overlapping layer and the number of layers, but is usually 1 mm or less. Incidentally, the pattern forming sheet, if necessary, a plasticizer,
You may mix | blend appropriate additives, such as a dispersing agent and a combustion improver.

The pattern-forming sheet of the present invention is used as it is, or as a firing label, by temporarily adhering it to an adherend and firing it, and fixing the fired sheet of the firing label or firing label to the adherend. It is preferably used. The above-mentioned baking label has a pattern made of heat-resistant ink provided on the low content layer side of the organic binder in the pattern forming sheet. When firing, a method may also be used in which an adherend is attached to the pattern-forming sheet, and this is fired to fix the adherent to the adherend via the fired body of the sheet.

An adhesive layer may be provided on the pattern-forming sheet or the baking label, if necessary, in order to enhance the temporary adhesion to the adherend. The adhesive layer is formed so as to disappear during firing. Therefore, the adhesive layer forming agent to be used may be any agent as long as it has an adhesive force capable of being temporarily attached to an adherend and disappears by being thermally decomposed at a firing temperature or lower.

Generally, a rubber adhesive, an acrylic adhesive, a vinyl alkyl ether adhesive, etc. are used. Above all, an acrylic adhesive mainly composed of a polymer of an alkyl ester of acrylic acid or methacrylic acid and a rubber adhesive are preferably used.

Examples of the rubber-based adhesive include natural rubber or similar synthetic rubber, butyl rubber, polyisoprene rubber, styrene / butadiene rubber, styrene / isoprene / styrene block copolymer rubber, styrene / butadiene / styrene block copolymer. 10 to 300 parts by weight of a tackifying resin such as petroleum-based resin, terpene-based resin, rosin-based resin, xylene-based resin, coumarone-indene-based resin, or 100 parts by weight of such a polymer such as rubber. Parts and the like, and those containing additions of compounding agents such as softening agents, anti-aging agents, coloring agents, and fillers.

Further, for forming an adhesive layer for temporarily adhering to an adherend which is in a wet state such as ceramics before firing, for example, polyvinyl alcohol adhesive, polyvinylpyrrolidone adhesive, polyacrylamide adhesive, cellulose A hydrophilic adhesive such as a system adhesive is preferably used. Such adhesives include, for example, polyvinyl alcohol, polyvinylpyrrolidone, polyacrylamide, acrylic acid copolymers, water-soluble polymers and hydrophilic polymers such as polyvinyl methyl ether, glycerin, polyethylene glycol, polyether polyol, polyoxyethylene phenol ether. , A tackifier such as polyoxyethylene alkylphenol ether, a cross-linking agent, and a filler.

The attachment of the adhesive layer to the pattern-forming sheet or the label for firing may be carried out by applying an adhesive using an appropriate coating machine, or by transferring the adhesive layer provided on the separator. It may be performed by an appropriate method according to the method of forming an adhesive tape or the like. The thickness of the attached adhesive layer can be determined according to the purpose of use, and is generally 1 to 500 μm. The adhesive layer is preferably protected by being attached with a separator or the like until it is put to practical use.

The pattern applied to the pattern forming sheet may be any pattern such as an ink pattern, a pattern consisting of holes or irregularities, a punching pattern (form), or a composite pattern of patterns formed by various methods. ..

The heat-resistant ink used for forming the baking label is prepared so as to be integrated with the baked body of the pattern forming sheet through a baking treatment. Such heat-resistant ink is usually prepared by using one or more inorganic colorants in a solvent, and if necessary, a ceramic powder, a binder, a plasticizer,
The mixture is mixed with an appropriate additive such as a dispersant in a ball mill or the like to form a paste-like fluid. Direct application method such as screen printing method in conventional technology,
Heat resistance is used for pasting ink that is used for transfer method of coating pattern formed on transfer paper, such as glass powder and optional components such as inorganic pigment, or colored glass-based pigment alone mixed with binder. This is a typical example of ink.

The composition of the heat-resistant ink may be appropriately determined depending on the contrast and adherence of the pattern forming sheet to the fired body. The composition of the components that remain after firing to form a firing pattern is typically 5 to 100 wt% inorganic colorant, ceramic powder, and especially 95 to 0 wt% glass powder. As the inorganic colorant and the ceramic powder that can be used for preparing the heat resistant ink, the same ones as in the case of the pattern forming sheet described above can be mentioned.

As the binder used as necessary for preparing the heat-resistant ink, there may be mentioned waxes, resins and the like that disappear by thermal decomposition at a firing temperature or lower.
The amount of binder used is 5 for the components that form the firing pattern.
-80 wt% is suitable.

Examples of waxes that can be preferably used include paraffin waxes, natural waxes, ester waxes, higher alcohol waxes and higher amide waxes. Examples of the resin include the organic binders exemplified as the material for forming the pattern forming sheet. If the binder such as the heat-resistant ink and the organic binder of the pattern forming sheet have remarkably different properties such as thermal decomposition temperature, appearance defects such as foaming and deformation are likely to occur in the fired body. From this point of view, the binder of the heat resistant ink and the organic binder of the pattern forming sheet are preferably made of the same type of resin.

The method of forming the pattern on the pattern forming sheet using the heat resistant ink is arbitrary. An appropriate pattern forming method such as a handwriting method, a coating method using a pattern forming mask, a transfer method of a pattern provided on a transfer paper, or a forming method by a printer such as an inkjet type may be adopted. The pattern forming method using a printer has an advantage that an appropriate pattern can be formed accurately and efficiently.

The pattern to be formed is also arbitrary. An arbitrary pattern such as a print pattern, a picture pattern, a bar code pattern, a circuit pattern may be provided. Necessary when forming a pattern by a printer, for example, an XY plotter, a wire dot type, a thermal transfer type or an impact type,
An ink sheet such as a print ribbon can be formed, for example, by holding a heat-resistant ink on a supporting base material such as a film or a cloth by a coating method, an impregnation method, or the like. As the supporting base material, a usual material such as a plastic film of polyester, polyimide, fluororesin or the like, a cloth made of fibers of polyamide, polyester or the like may be used.

When forming an identification label, etc.,
It is preferable to use a combination of a ceramic powder, a colorant and the like so that a good contrast or a difference in color tone is formed between the fired body of the pattern forming sheet and the fired pattern of the heat resistant ink.

The method of forming a label by engraving a pattern of holes or irregularities on a pattern forming sheet and the forming pattern are arbitrary. In the hole pattern, any display method such as a method in which the hole portion represents the display content or a method in which the remaining sheet portion other than the hole portion represents the display content may be adopted. Furthermore, a punched hole line pattern is formed,
In the end, a method may be adopted in which only the inner part of the hole line pattern remains on the adherend. This method can be preferably applied to the formation of a bar code pattern or a picture pattern, for example. It is also advantageous when it is difficult to handle as a punched body because it is easily damaged. In addition to the case where the pattern consisting of unevenness is also for decoration purposes,
It can be used to form an identification label such as a bar code pattern applied to a reflected light amount detection type recognition device or the like.

The step of forming the pattern or form on the pattern forming sheet may be performed before or after the pattern forming sheet is temporarily attached to the adherend. When a pattern is formed by a printer, it is usual to apply a pattern to a pattern forming sheet in advance and temporarily attach it to an adherend. The method of forming a pattern or the like on the pattern forming sheet after the temporary attachment to the adherend has an advantage that the uneven pattern can be provided under the temporary adhesion process and is excellent in processing efficiency, or the deformation of the uneven pattern due to the temporary adhesion can be prevented. It has the advantage of excellent pattern preservation.

When the pattern is formed on the pattern forming sheet in advance, the surface on which the pattern is formed may be protected by, for example, adhering a separator until it is subjected to the baking treatment. In the case of the transfer method, the transfer paper may be directly adhered and replaced with the separator.

The baking treatment of the temporary adherend of the pattern forming sheet having the pattern formed thereon and the adherend can be carried out under appropriate heating conditions depending on the baking temperature of the pattern forming sheet or the adherend. By the baking treatment, organic components such as the organic binder and the adhesive layer disappear, and the pattern forming sheet is integrated with the pattern to form a baked body and is fixed to the adherend.

The pattern-forming sheet or firing label of the present invention can be preferably used for various purposes such as painting on ceramics, glass products, enamel, etc., and providing identification labels. In addition, products made of glass, ceramic, metal, etc., or transport pallets, especially heat resistant substrates such as ceramics and prototypes, arbitrary identification symbols such as company name, lot number, product name, colored or color-coded patterns, bar codes, etc. It can also be preferably used for giving an identification label consisting of Therefore, the adherend to which the firing pattern is applied is not particularly limited, and one that can withstand the firing temperature of the pattern forming sheet is used. Also, an unsintered ceramic molded body or a wet body such as unsintered ceramics can be used as the adherend, and in this case, the ceramic molded body and the patterning sheet should both be sintered. You can also The form of the adherend is arbitrary such as a flat plate form or a container form.

Example 1 80 parts by weight of glass powder containing PbO, SiO ₂ , B ₂ O ₃ and Al ₂ O ₃ as main components (parts by weight, the same applies hereinafter), and an average particle size of 0.5 μm.
20 parts of titania powder, acrylic resin binder 30
Part and 2 parts of dibutyl phthalate are uniformly mixed in a ball mill with 50 parts of toluene, and a slurry having a thickness of about 40 μm is spread on a polyester film treated with a release agent by a doctor blade method and dried. Formed. On the other hand, using an acrylic resin binder in an amount of 25 parts, a layer having a thickness of about 30 μm is formed in accordance with the above, and the layer is laminated at about 90 ° C. by stacking it on top of the above layer and the polyester film is peeled off to a thickness of about 70 μm. To obtain a pattern forming sheet.

Next, the thickness formed on the separator is about 20.
After adhering the acrylic adhesive layer of μm to the side containing a large amount of the acrylic resin binder of the pattern forming sheet, the heat-resistant ink is transferred to the other surface of the pattern forming sheet through the thermal transfer printer and the ink sheet. A bar code pattern was formed to obtain a label for firing. The ink sheet used was chromium oxide, iron oxide, cobalt oxide black pigment 25 parts, paraffin wax 25 parts and toluene 50.
Part of the paste is heat-resistant ink applied to a polyester film, dried, and held.

Example 2 Glass powder 85 containing PbO, B ₂ O ₃ and ZnO as main components
Parts, 15 parts of mica powder having an average particle size of 15 μm coated with titania powder having an average particle size of 0.3 μm, 40 parts of an acrylic resin binder, and 4 parts of dibutyl phthalate and 60 parts of toluene.
Part mixed slurry, PbO, B ₂ O ₃ , ZnO
85 parts by weight of glass powder with an average particle size of 0.3 μm
A sheet for pattern formation according to Example 1 using a slurry prepared by mixing 15 parts of mica powder having an average particle size of 15 μm coated with 50 parts of titania powder, 20 parts of an acrylic resin-based binder, and 50 parts of toluene with 50 parts of toluene. When,
A label for firing was obtained.

Comparative Example 1 80 parts of a glass powder containing PbO, SiO ₂ , B ₂ O ₃ and Al ₂ O ₃ as main components, and a titania powder 20 having an average particle size of 0.5 μm.
Parts, 30 parts of an acrylic resin-based binder, and 2 parts of dibutyl phthalate were uniformly mixed in a ball mill with 50 parts of toluene, and a slurry was spread on a polyester film treated with a release agent by a doctor blade method and dried. A sheet having a thickness of about 70 μm was formed, and the acrylic pressure-sensitive adhesive layer and the bar code pattern were formed on the sheet according to Example 1 to obtain a label for firing.

Comparative Example 2 80 parts of a glass powder containing PbO, SiO ₂ , B ₂ O ₃ and Al ₂ O ₃ as main components, and a titania powder 20 having an average particle size of 0.5 μm.
Part, 25 parts of acrylic resin-based binder, and 2 parts of dibutyl phthalate were uniformly mixed in a ball mill with 50 parts of toluene, and a slurry was spread on a polyester film treated with a release agent by a doctor blade method and dried. A sheet having a thickness of about 70 μm was formed, and the acrylic pressure-sensitive adhesive layer and the bar code pattern were formed on the sheet according to Example 1 to obtain a label for firing.

Comparative Example 3 Glass powder 85 containing PbO, B ₂ O ₃ and ZnO as main components
Parts, 15 parts of mica powder having an average particle size of 15 μm coated with titania powder having an average particle size of 0.3 μm, 40 parts of an acrylic resin binder, and 4 parts of dibutyl phthalate and 60 parts of toluene.
Partly mixed with a ball mill to form a slurry, which is spread by a doctor blade method on a polyester film treated with a release agent and dried to form a sheet having a thickness of about 70 μm. An acrylic pressure-sensitive adhesive layer and a bar code pattern were formed in the same manner to obtain a label for firing.

Comparative Example 4 Glass powder 85 containing PbO, B ₂ O ₃ and ZnO as main components
Parts, 15 parts of mica powder having an average particle size of 15 μm coated with titania powder having an average particle size of 0.3 μm, 20 parts of an acrylic resin binder, and 2 parts of dibutyl phthalate and 50 parts of toluene.
Partly mixed with a ball mill to form a slurry, which is spread by a doctor blade method on a polyester film treated with a release agent and dried to form a sheet having a thickness of about 70 μm. An acrylic pressure-sensitive adhesive layer and a bar code pattern were formed in the same manner to obtain a label for firing.

Evaluation Test The firing labels obtained in Example 1 and Comparative Examples 1 and 2 were temporarily attached to a glass plate via the adhesive layer, and the temperature rising rate was 20 ° C./min, 60.
Firing (in air) was performed at 0 ° C. for 30 minutes. Note that the organic components such as the acrylic resin binder were burned off by firing. As described above, in Example 1, a glass plate having a black bar code pattern in a clear state on a white background and having a baked label firmly fixed without cracks, foaming, shrinkage or the like was obtained. However, in Comparative Example 1, cracks and foaming occurred on the fired label, and the bar code pattern was not uniform. In Comparative Example 2, the fired label shrank and the barcode pattern was distorted.

On the other hand, the firing labels obtained in Example 2 and Comparative Examples 3 and 4 were temporarily attached to a glass plate via the adhesive layer, and fired at a heating rate of 30 ° C./minute, 500 ° C. for 30 minutes. (In the air) Note that the organic components such as the acrylic resin binder were burned off by firing. As described above, in Example 2, the black barcode pattern was clearly formed on the white background,
In addition, a glass plate to which the fired label was firmly adhered without cracks, foaming, shrinkage, etc. was obtained. However, in Comparative Example 3, cracks and foaming occurred in the fired label, and the bar code pattern was not uniform. In Comparative Example 4, the fired label shrank and the barcode pattern was distorted.

[0052]

According to the pattern forming sheet or the firing label of the present invention, it is possible to perform firing without causing firing defects such as cracks and foaming even when firing is performed at a high temperature rising rate.
The firing pattern can be firmly fired and fixed to the adherend. Therefore, it is possible to efficiently form a fired pattern having excellent heat resistance, weather resistance, chemical resistance, etc. while maintaining the applied pattern in a good condition.

[Brief description of drawings]

FIG. 1 is a sectional view of an embodiment.

[Explanation of symbols]

 1: Pattern Layer 2: Pattern Forming Sheet 21: Layer with Low Content of Organic Binder 22: Layer with High Content of Organic Binder 3: Adhesive Layer 4: Adherend

Claims (3)

[Claims] 1. A pattern-forming sheet, characterized in that two or more layers, each of which is formed by holding a ceramic powder in a sheet form with an organic binder, are superposed in a combination of different contents of the organic binder. 2. A label for baking, wherein the pattern forming sheet according to claim 1 has a pattern made of a heat resistant ink on the side of the low content layer of the organic binder. 3. The pattern forming sheet according to claim 1, which has an adhesive layer for temporarily adhering to an adherend, or the baking label according to claim 2.