JPH03132343A - Preparation of baked pattern - Google Patents

Abstract

PURPOSE:To enhance the heat-resistance and sharpness of a baked pattern by applying and forming a pattern composed of a powder of a reactive metal compound on a ceramic baked body and heating the applied pattern to fix the same to the baked body. CONSTITUTION:A ceramic powder composed of alumina, zirconia or mullite is molded into an appropriate shape such as a substrate and baked to obtain a ceramic baked body. One or more kinds of powder composed of a metal such as Fe, Ni or Cr capable of reacting with the ceramic baked body by heat treatment or silicide or nitride thereof is used to form a pattern such as a printing pattern or a picture pattern on the ceramic baked body. Subsequently, the ceramic baked body is heat-treated under an oxidative atmosphere to fix the powder of the metal or metal compound forming the pattern under the reaction with the ceramic baked body to obtain a baked pattern.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a method for manufacturing a fired pattern, in which a pattern made of metal powder provided on a ceramic fired body is reacted and fixed by heat treatment.

Conventional technologies and issues As production systems shift to high-mix, low-volume production, patterns for identification labels used to manage products made of metals and fired ceramics, semi-finished products, parts, etc. There is a demand for products with excellent chemical resistance and solvent resistance.

Conventionally, as a label pattern with excellent durability and solvent resistance, a pattern formed by fixing glass powder to a substrate made of metal, wax, fired ceramic, etc. while melting it was known. -142083).

However, there was a problem in that the formed pattern lacked sharpness due to blurring due to melting and flow of the glass component. Furthermore, since the pattern bleeds or dissolves due to remelting or melting of the glass component in the formed pattern, the temperature at which the label can be used and the chemicals that can be used are greatly restricted, and there is a problem in that the heat resistance and chemical resistance are generally poor.

Means for Solving the Problems The present inventors have overcome the above-mentioned problems, and have achieved brightness, heat resistance,
As a result of extensive research in order to form a filter pattern with better chemical resistance, it was discovered that this objective could be achieved by providing a pattern of metal powder on a fired ceramic body and fixing it by reaction under heating, and the present invention. I came to do this.

That is, the present invention is characterized in that a pattern made of powder of a metal or metal compound that can react with the fired ceramic body is provided on the fired ceramic body, and then heat treated, and the applied pattern is fixed through the reaction with the fired ceramic body. A method for manufacturing a fired pattern is provided.

By the action heat treatment, the metal powder and the like are integrated while preserving their pattern form, and are fixed to the fired ceramic body. At that time, the metal or metal compound powder that forms the pattern reacts with the fired ceramic body, improving heat resistance, scratch resistance, durability,
Forms a fired pattern with excellent chemical resistance, solvent resistance, etc., and excellent clarity. On the other hand, the pattern can be easily provided by an appropriate printing method such as a thermal transfer printer or screen printing, or a transfer method using transfer paper, and can be formed at any time.

Examples of Constituent Elements of the Invention The ceramic fired body used in the present invention is obtained by molding ceramic powder such as alumina, zirconia, mullite, or magnesia into an appropriate form such as a substrate and firing it.

The pattern provided on the ceramic fired body is formed using one or more metal or metal compound powders that can react with the ceramic fired body during heat treatment. Examples of metals or metal compound powders that can be used include metals such as iron, nickel, cobalt, chromium, molybdenum, manganese, copper, aluminum, and titanium, as well as their silicides, nitrides, carbides, borides, and carbonates. Examples include nitrates, sulfates, etc. The particle size of the powder is 0.1-50
Among Jj11, 0.2 to 20μ is suitable.

The pattern to be provided is arbitrary, such as a printed pattern, a transfer pattern, a picture pattern, and a barcode pattern. Furthermore, the pattern formation method is also arbitrary.

Direct application method via a pattern forming mask such as handwriting method or screen printing method, method of transferring the pattern on transfer paper, method of providing the pattern on a flammable flexible base material and gluing it, method of forming using a printer. Any suitable method may be applied.

The ink liquid used in the handwriting method, coating method, etc. can be prepared as a liquid in which metal powder or the like is simply dispersed in a solvent, or as a paste-like liquid using a binder in combination. Heat-fixable ink made using wax or a heat-fusible binder made of a polymer with a softening point of 40 to 200°C based on the ring and ball method can be used on an XY plotter, wire tod type, thermal transfer type, impact type, etc. as appropriate. It can be advantageously used to form an ink sheet for forming a pattern using a printer.The pattern forming method using a printer has the advantage that a suitable pattern can be formed efficiently and accurately.

The general composition ratio of the metal or metal compound powder, wax, and polymer in the heat fixable ink is 3 to 1000 parts by weight of the heat-fusible binder, especially per 100 parts by weight of the metal or metal compound powder. Wax 3-500
parts by weight, 0 to 500 parts by weight of the polymer. The heat fixable ink can be prepared by appropriately mixing these materials using a solvent or the like. Ink sheets for use in printers, etc. are produced by applying heat-fixable ink to a support base material such as film, paper, metal foil, cloth, etc.
It can be formed by impregnating it and holding it.

The method of applying the pattern formed on the flammable flexible base material to the ceramic fired body may be determined as appropriate, such as a method of adhering via an adhesive or a method of heat-pressing the combustible flexible base material.

As the flammable flexible base material, one that disappears by thermal decomposition during heat treatment is used. Examples include films made of hydrocarbon resins, vinyl or styrene resins, acetal resins, butyral resins, acrylic resins, polyester resins, urethane resins, cellulose resins, rubber resins, etc. Examples include woven fabric, non-woven fabric, and paper. It may contain additives such as plasticizers. It is preferable to use a material that has good burn-off properties during heat treatment, and from this point of view, films made of hydrocarbon resins, acetal resins, acrylic resins, cellulose resins, especially acrylic resins are preferred. The thickness of the combustible flexible base material may be determined as appropriate. Generally 10-500μm
, especially 30 to 100 μI.

If it is too thin, it will be difficult to handle; if it is too thick, it will fall off during heat treatment, or the fired pattern will tend to bleed or foam.

The adhesive used is one that disappears by thermal decomposition below the heat treatment temperature, preferably a rubber adhesive,
Acrylic adhesives, vinyl alkyl ether adhesives, etc. are used. In particular, from individual polymers such as natural rubber and its similar synthetic rubbers, butyl rubber, polyisoprene rubber, styrene-butadiene rubber, styrene-isoprene-styrene block copolymer rubber, and styrene-butadiene-styrene block copolymer rubber. 10 to 30 parts by weight of a tackifying resin such as petroleum resin, terpene resin, rosin resin, xylene resin, coumaron indene resin to 100 parts by weight of such polymer.
0 parts by weight, rubber adhesives containing additives such as softeners, anti-aging agents, colorants, fillers, etc., acrylic adhesives mainly composed of polymers of alkyl esters of acrylic acid or methacrylic acid, etc. is preferred.

The adhesive may be applied to the flammable flexible base material or ceramic fired body during the adhesion process, or an adhesive layer may be formed on the combustible flexible base material in advance. The adhesive layer can be attached to the flammable flexible substrate by, for example, transferring the adhesive layer provided on the separator, or applying the adhesive using an appropriate coating machine, or forming an adhesive tape. This may be done using any appropriate method according to the method. The thickness of the adhesive layer is
It is usually 2 to 50 µlls, especially 5 to 20 μι. If it is too thin, sufficient adhesive strength will not be developed, and if it is too thick, it will fall off during heat treatment, or the fired pattern will tend to bleed or foam. Note that the adhesive layer is usually protected by pasting a separator or the like until it is adhered to an adherend.

The heat treatment of the pattern provided on the fired ceramic body is performed in an oxidizing atmosphere. Thereby, the metal or metal compound powder forming the pattern can be fixed while reacting with the ceramic fired body. The heat treatment may be performed at an appropriate temperature depending on the allowable temperature limit of the fired ceramic body, the reaction temperature with the metal powder forming the pattern, etc.

Effects of the Invention According to the present invention, since the metal pattern is reacted and fixed on the fired ceramic body, the fired pattern that is formed is difficult to bleed (and a fine pattern can be formed with high precision. The fired pattern has excellent preservation, clarity, scratch resistance, heat resistance, durability, chemical resistance, and solvent resistance of the applied pattern, and has excellent adhesion to ceramic fired bodies. It also has the advantage that it can be easily and flexibly applied and can be easily applied to curved surfaces.

Example 1 A slurry-like ink liquid prepared by uniformly mixing 100 parts (parts by weight, same hereinafter) of Nira gel powder with an average particle size of 2 um and 20 parts of polyisobutyl methacrylate with 30 parts of toluene in a ball mill was applied through a pattern mask. 96%
Alumina substrate (30M x 7011IITIx1rIn)
A barcode pattern was formed by coating and printing on top, and the barcode pattern was heated at a rate of IO'c/min and heat-treated at 1400° C. for 1 hour in the air. Organic components such as polyisobutyl methacrylate were burnt out by the heat treatment.

As a result of the above, a fired pattern was obtained in which a clear green-blue barcode pattern was firmly adhered to the alumina substrate without any bleeding.

Example 2 A barcode pattern made of metal powder ink was printed via a pattern mask on the other side of a polybutyl methacrylate film with a thickness of 40 μI, which had an adhesive layer of 10 parts m thick made of an acrylic adhesive on one side. and dried to form a patterned film.

The metal powder ink used was a paste made by uniformly mixing 60 parts of Co powder with a particle size of 1 μm and 20 parts of polybutyl methacrylate with 20 parts of toluene.

Next, apply the pattern film to the adhesive layer 9.
It was adhered onto an 8% alumina substrate, heated at a rate of 10° C./min, and heat-treated at 1450° C. for 1 hour in the air. Organic components such as the polybutyl methacrylate film were burnt out by the heat treatment.

According to the above Clear, no smearing on alumina substrate blue color barcode The baked pattern is firmly fixed. A pattern was obtained.

Claims (1)

[Claims] 1. A firing pattern characterized in that a pattern made of a powder of a metal or metal compound that can react with the ceramic fired body is provided on the ceramic fired body, and then heat treated, and the applied pattern is fixed through the reaction with the ceramic fired body. Production method.