JPH0383089A - Ink acceptable sheet for burning and label for burning - Google Patents

Abstract

PURPOSE:To improve durability, heat resistance and chemical resistance by providing an ink acceptable layer formed with glass powder by an organic binder on one surface of a pressure sensitive adhesive layer. CONSTITUTION:The ink acceptable layer formed with glass powder by the organic binder is provided on one side of the pressure sensitive adhesive layer. The burning sheet is flexible and readily applicable to a curved surface, and a pattern is optionally accepted thereon by an appropriate printing method adopted by a transfer thermal printer, etc. The sheet is simply and temporarily fitted to a body to be fitted via the pressure sensitive adhesive layer. The sheet is mixed with a pattern added by burning and turns into a burning body. At this time a fused glass component serves as an adhesive to firmly fix to the body to be fitted. Thus, a burning pattern excellent in heat resistance, durability and chemical resistance is formed.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an ink-receiving baking sheet suitable for forming a baking pattern with excellent fixing properties, heat resistance, and scratch resistance, and a baking label made from the same.

Conventional technologies and issues As production systems shift to high-mix, low-volume production, it is important to improve the durability, heat resistance, and chemical resistance of products made of metal, glass, fired ceramics, etc., as well as semi-finished products and parts. Superior labels are required.

Conventionally, substrate-type labels made of fired ceramics, metals, wax bodies, etc. have been known as management labels with excellent heat resistance.

However, there are problems with fixing time due to screws, etc., problems with the lack of adhesion to curved surfaces due to rigidity, problems with the flexibility of control labels due to on-site patterning, and problems with individual parts etc. under a high-mix, low-volume production system. There were problems such as the lack of formability of the wide variety of labels necessary for management.

Means for Solving the Problems The present invention overcomes the above-mentioned problems by providing a firing sheet that fuses the applied patterns and adheres to the adherend during firing.

That is, the present invention provides an ink-receptive type for firing, which is characterized in that an ink-receptive layer formed by holding glass powder in shape with an organic binder is formed on one side of the adhesive layer, if necessary (with a flexible support member interposed therebetween). The present invention provides a firing blade label comprising a sheet and the above-mentioned ink-receptive firing sheet provided with a pattern made of thermogenic ink.

Function: The above-mentioned ink-receptive firing sheet is flexible and can be easily applied to curved surfaces, and can be applied with a pattern using an appropriate printing method such as a thermal transfer printer. By firing, the ink-receptive firing sheet blends with the pattern imparted to form a fired body, and the molten glass component functions as an adhesive and attaches to the adherend IS easily. It adheres to the substrate and forms a fired pattern with excellent heat resistance, durability, and chemical resistance.

Examples of Constituent Elements of the Invention The ink-receptive firing sheet of the present invention has an ink-receptive layer made of glass powder shape-retained with an organic binder.

The glass powder used is one that softens or melts at a predetermined firing temperature and adheres to the adherend.

Therefore, any known glass powder can be used. Examples include PbO・B2O3, PbO-B20
3” ZnO, Si, 02・B20s・R20XS
i02 ・5rO-R20z 5iOz ・BaO・R
20s P b O-3s O2・R20s P b
O-3i O2・ZnO-B2O3, PbO-8iO2
- Examples include B2O3. The particle size of the glass powder to be used may be determined as appropriate depending on the firing conditions, etc., but is generally 300 u+a or less, especially 100 u or less.

There are no particular limitations on the organic binder either. It is preferable to use a material that disappears without leaving any ash during firing and has excellent shape retention, flexibility, and strength. In case of low baking temperature,
It is appropriate to use nitrocellulose resin or acrylic resin. When the firing temperature is high, hydrocarbon resins, vinyl or styrene resins, acetal resins, butyral resins, polyester resins, urethane resins, ethyl cellulose resins, cellulose resins, etc. are also preferably used. . If the firing temperature is low and the decomposition of the organic binder is insufficient, a combustion improver such as a peroxide such as sodium peroxide, calcium peroxide, or magnesium peroxide may be used in combination. The appropriate amount to be used is 5 to 15% by weight of the organic binder.

The ink-receiving layer can be formed, for example, by mixing glass powder and one or two organic binders using a solvent or the like in an appropriate mixer such as a ball mill or roll mill, and applying the mixture to an adhesive layer using an appropriate method. Alternatively, it can be carried out by a method of spreading it on a support base material such as a separator and drying it. The amount of organic binder used is 20 parts per 100 parts by weight of glass powder.
~80 parts by weight is suitable. Any suitable solvent may be used, and generally, butyl carpitol, ethyl acetate, butyl cellosolve acetate, methyl ethyl ketone,
Methyl isobutyl ketone, toluene, etc. are used.

The amount used is appropriately such that the organic binder concentration is 5 to 40% by weight.

When preparing the liquid mixture, appropriate additives such as a dispersant and an antifoaming agent may be added as necessary.

As a method for spreading the mixed liquid, a method that has excellent layer thickness control accuracy, such as a doctor blade method, is preferable.

The thickness of the ink-receiving layer to be formed may be appropriately determined depending on the purpose of use, and is generally 10 μII to 5II 1 ml.

The ink-receptive baking sheet of the present invention has an ink-receptive layer on one side of the adhesive layer. A flexible support member may be interposed between the adhesive layer and the ink-receiving layer, if necessary.

There are no particular limitations on the adhesive used, but it is preferable to use one that has good erasability during firing. An example thereof is an acrylic pressure-sensitive adhesive whose main component is a copolymer of an acrylic acid alkyl ester as a raw monomer and a polar group-containing monomer.

The acrylic acid alkyl esters include ethyl group, butyl group, 2-ethylhexyl group, isononyl group,
Examples include esters of acrylic acid and methacrylic acid having an alkyl group having 2 to 14 carbon atoms such as an isodecyl group and a lauryl group. Examples of polar group-containing monomers include carboxylic acid monomers such as acrylic acid, methacrylic acid, itaconic acid, and maleic acid, hydroxyl group-containing monomers such as hydroxymethyl acrylate, hydroxyethyl acrylate, and hydroxyethyl methacrylate, and amino groups such as aminoethyl acrylate. Examples include contained monomers. The usage ratio of acrylic acid alkyl ester monomer is
80-99.9 fU amount %, especially 85-99.9 weight % is suitable. Such a copolymer can be obtained, for example, by radical polymerizing monomers in a conventional manner.

The weight average molecular weight of the copolymer used for the adhesive is 100,000 to 2
0,000,000 is appropriate.

The copolymer may be used alone or in combination with appropriate additives such as a crosslinking agent, anti-aging agent, plasticizer, tackifier, and filler. The cross-linking agent is effective in improving the cohesive force of the adhesive layer through cross-linking treatment, and the amount of the cross-linking agent used is
A suitable amount is 20 parts by weight or less per 00 parts by weight. In addition,
The cohesive force of the adhesive layer can also be improved by crosslinking treatment using electron beam or ultraviolet ray irradiation. In that case, the above-mentioned crosslinking agent may be used in combination. There are no particular limitations on the crosslinking agent used. Generally hexamethylene diisocyanate, 2
．． Isocyanate-based crosslinking agents such as 4-tolylene diisocyanate, 1, 3,5-tris(6-isocyanatehexyl)-2゜4,6-dryoxo 1.3.54 riazine, trimethylolmelamine, hexamethylolmelamine, etc. Melamine crosslinking agent, tetraglycidyl-1,
Epoxy crosslinking agents such as 3-bisaminomethylcyclohexane and ethylene glycol diglycidyl ether, and peroxide crosslinking agents such as benzoyl peroxide and lauroyl peroxide are used.

The adhesive layer may contain one or more heat-resistant pigments in order to improve the contrast with the applied pattern. The heat-resistant pigments also include compounds such as carbonates, nitrates, and sulfates that are oxidized during firing to become the desired coloring agent. The heat-resistant pigment to be used may be appropriately determined depending on the desired color. By the way, when coloring to white, oxide-type ceramics such as silica, zirconia, titania, alumina, zinc white, and calcium oxide, or carbonates, nitrates, and sulfates that become oxidized ceramics are used. It will be done. The blending amount may be determined as appropriate within a range that does not result in insufficient adhesive strength to the adherend.

The adhesive layer may be formed by any suitable method similar to the method used to form adhesive tapes, such as by coating on the separator, the ink receiving layer, etc. using an appropriate coating machine. The thickness of the adhesive layer provided may be determined depending on the intended use.

Generally, it is 1 to 500 l711.

The above-mentioned flexible support member interposed between the adhesive layer and the ink receiving layer as necessary is interposed for the purpose of reinforcement, etc., and is formed as a resin film, a resin coating layer, or the like. The resin used is preferably one exemplified as the organic binder above. The thickness may be determined as appropriate, and is generally 500 μm or less.

The ink-receptive firing sheet of the present invention is used for purposes such as temporary attachment to an adherend and firing after imparting a pattern to fix the fired product to an adherend. Firing may be performed under appropriate heating conditions depending on the glass powder used.

The baking label of the present invention has a pattern made of heat-resistant ink provided in the ink-receiving layer of the above-mentioned ink-receptive baking sheet.

Examples of the heat-resistant ink include paste-like ink made by mixing glass powder, inorganic powder, etc. with a binder. The general composition of heat-resistant ink is
0 to 95% by weight of glass powder, 100 to 5% by weight of coloring components such as metal powders or inorganic pigments, and binder used if necessary: 5 to 50% by weight of the components forming the fired body.

The pattern can be formed using any heat-resistant ink.

Hand-drawn method, application method via pattern-forming mask,
Any suitable pattern forming method may be used, such as a method of transferring a pattern provided on transfer paper or a method of forming using a printer. The pattern to be formed is also arbitrary, and any pattern such as a printed pattern, a transfer pattern, a picture pattern, a barcode pattern, etc. may be formed.

Ink sheets such as printing ribbons, which are required when forming patterns using printers such as XY block, wire dot type, thermal transfer type, or impact type, are made by applying heat-resistant ink from film, cloth, etc. using coating methods, impregnation methods, etc. It can be formed by holding it on a supporting base material. The pattern formation method using a printer is
There is an advantage that a suitable pattern can be formed accurately and efficiently. In the case of forming a control label, etc., it is preferable that the ink-receiving layer as a sheet material and the applied pattern be combined in such a way that a good contrast or difference in color tone is produced in the fired product.

The step of forming the above-mentioned firing label by imparting a pattern to the ink-receptive firing sheet may be performed either before or after the ink-receptive firing sheet is temporarily attached to an adherend. In the former case, the label for firing is formed in advance, and there is an advantage that a fine pattern can be applied using an appropriate device.

In the latter case, the ink-receptive firing sheet temporarily adhered to the adherend is processed to form the firing label, and the pattern can be preserved without causing deformation of the applied pattern during temporary attachment. It has the advantage of being superior in terms of gender.

The firing label temporarily attached to the adherend is baked at a predetermined temperature to be fixed to the adherend as a fired product with its pattern preserved.

Therefore, such firing labels are preferably used for painting ceramics, glass products, floating objects, etc., and for attaching management labels. In addition, products made of glass, ceramics, metals, etc., transport pallets, especially heat-resistant substrates such as ceramics, prototypes, etc., may be marked with company name, AT number, product name, destination of delivery, country of export, or any other identification symbol, coloring. It can also be preferably used for attaching management labels consisting of color-coded patterns, bar codes, etc. In addition, when the adherend is made of unfired ceramic powder, firing of the ink-receptive firing sheet or firing label, firing of the adherend,
Alternatively, it can also be used as a heat treatment.

Effects of the Invention The ink-receptive baking sheet or baking label of the present invention has excellent flexibility and can be easily temporarily attached to adherends with various shapes such as curved surfaces through the adhesive layer. . In addition, patterns can be applied on-site, etc., and changes in products can be quickly responded to in a high-mix, low-volume production system. Furthermore, the fired product retains the applied pattern well through firing, and the fired product has excellent durability, heat resistance, chemical resistance, water resistance, and corrosion resistance, as well as excellent adhesion to adherends. .

Reference example Co2 TiO4・Ni0ZnO (ratio! 5.0 g/c
c) 50 parts (by weight, same hereinafter), 35 parts of paraffin wax, and 15 parts of ethylene/vinyl acetate copolymer were uniformly dispersed in toluene using a roll mill to make a heat-resistant ink (specific gravity 3, 0 g/cc). A coating liquid was prepared, and the coating liquid was applied onto a polyester film having a thickness of 6u+g to a thickness of about 5I711 after drying, and dried to produce an ink sheet.

Example 1 Titania powder (16n) was added to an adhesive consisting of 80 parts of a copolymer with a weight average molecular weight of 500,000 consisting of 99 parts of butyl acrylate and 1 part of acrylic acid, and 4 parts of hexamethylene isocyanate.
This is applied onto the separator using a gravure coating machine to form an adhesive layer with a thickness of 20 cm, and on top of that an adhesive layer with a thickness of 30 cm is applied.
An ink-receptive sheet for firing was obtained by providing an ink-receiving layer with a μ value. The ink receiving layer is made of PbO-8iO2.B
40 parts of glass powder consisting of 2O3, PbO...B2O3
・20 parts of glass powder consisting of ZnO, 30 parts of isobutyl polymethacrylate, 2 parts of dibutyl phthalate, and 0.5 parts of a dispersant are uniformly mixed in a ball mill using toluene to obtain a paste, which is coated with a doctor blade. It is formed by coating on the adhesive layer using a machine and drying it.

Next, after peeling and removing the separator on the ink-receiving layer side of the ink-receptive baking sheet, a predetermined barcode pattern is formed on the ink-receiving layer using a thermal transfer printer and the ink sheet of the reference example, A label for firing was obtained.

The separator was peeled off from the above baking label, and the surface was temporarily attached to a stainless steel plate whose surface had been heated and oxidized via the exposed adhesive layer, and baked at 750° C. for 30 minutes. Organic components such as adhesives disappeared by firing.

Through the above process, a fired pattern fixed to the stainless steel plate was obtained. The firing pattern was a black barcode pattern formed on a white background with strong contrast and was firmly fixed. In addition, the oxide film formed on the stainless steel surface and the fired layer of glass powder were fused, and the stainless steel plate and fired pattern were firmly attached.

Example 2 According to Example 1, an ink-receiving layer was formed on a 50-thick polyester film, and this was laminated to an adhesive layer on a separator via the polyester film to prepare an ink-receptive type for baking. A sheet was obtained, which was used to form a label for baking, which was temporarily attached to a stainless steel plate whose surface had been heated and oxidized via the adhesive layer, and baked at 750° C. for 30 minutes. Organic components such as adhesives disappeared by firing.

Through the above process, a fired pattern fixed to the stainless steel plate was obtained. The firing pattern was a black barcode pattern formed on a white background with strong contrast and was firmly fixed. In addition, the oxide film formed on the stainless steel surface and the fired layer of glass powder were fused, and the stainless steel plate and fired pattern were firmly attached.

Claims (1)

[Scope of Claims] 1. An ink-receptive sheet for firing, characterized in that it has an ink-receptive layer made of glass powder shape-retained with an organic binder on one side of an adhesive layer. 2. An ink-receptive sheet for firing, characterized by having an ink-receptive layer formed by holding glass powder in shape with an organic binder on one side of the adhesive layer via a flexible support member. 3. The ink-receptive baking sheet according to claim 1 or 2, wherein the adhesive layer contains a heat-resistant pigment. 4. A firing label, characterized in that the ink-receptive firing sheet according to claim 1 or 2 is provided with a pattern made of heat-resistant ink.