JPS6012994B2 - Method for manufacturing a sintered body with a pattern - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a baked striped body for ceramics, tile products, etc., and more particularly to a method for manufacturing a brickwork with a sketch.

Conventionally, various methods such as hand-painting, screen printing, and transfer methods have been used to decorate ceramics, tile products, and the like.

However, the hand-drawing method not only takes time and reduces work since it is done manually, but also has the disadvantage that it is not suitable for mass production because it does not reproduce the same pattern. In addition, although the screen printing method and transfer method can reproduce the image, since a hydrophobic resin is used as an ink binder in the transfer layer, a mixture of water and yuzu medicine is repelled by the image surface, causing baking. The pongee layer is not placed on top of the pattern, so it cannot be used as an underpainting. Therefore, before hanging the sleeves, pre-firing was performed to remove the hydrophobic resin mentioned above to remove the excess components (especially the hydrophobic resin) in the pattern, so that the muddy acid of pongee medicine was also placed on the pattern. . Conventionally, this meant that firing required two times: preliminary firing and main firing, which was a drawback in terms of time and cost. The present invention provides an underpainting technique that can omit the pre-firing step after the commissioned painting, and is intended to obtain a sintered body with the underpainting by only one firing. That is, using a transfer paper equipped with a transfer layer consisting of at least three layers: a release layer, a pattern layer, and an adhesive layer, each made of a hydrophobic resin, a hydrophilic resin, or a water-soluble resin containing a foaming agent. The design is transferred to the base of a sintered body such as ceramics or tiles, and then Yuzukake is applied using a mixture of Tsumugi medicine and water, or a mixture of dispersion prepared by adding a surfactant of Tsumugi medicine and water. I will do it. After the process is completed, the piece is fired in the usual way to obtain a painted Akatsuki body. The present invention will be explained in more detail.

A major feature of this method is that the above-mentioned pre-firing step after painting can be omitted.

In detail, a dry heat transfer method is used as the painting method, and the transfer paper structure is such that it is adhered to a ceramic or tile base by pressure and heat on a base material that can withstand pressure and heat, such as paper, cellophane, or polyester, and contains a foaming agent. adhesive layer, ceramics,
An ink layer containing a pigment for tile painting and a foaming agent, and a release layer that separates the ink layer from the base material when pressurized and heated from the base material side during transfer and also contains a foaming agent. It comprises at least three layers of. Here, the resin of each layer constituting the transfer layer will be explained. The adhesive layer is a resin that can impart adhesive properties to ceramics/tile substrates by pressurizing and heating, and includes thermoplastic resins such as polyamide, acrylic, and maleic acid resins, thermosetting resins such as epoxy, and polyvinyl alcohol and polyvinylpyrrolidone. , methyl cellulose, water-based acrylic, polyvinyl methyl ether, or other water-soluble resin or hydrophilic resin. The ink layer contains ceramic and tile pigments with excellent high-temperature resistance, and uses a resin binder that does not cause cracks or pinholes during firing. Resins include water-soluble resins, hydrophilic resins,
Any oil lagoon resin may be used, but water-soluble resins or hydrophilic resins are preferred. The release layer is one that produces releasability between the base material and the release layer by pressure and heating, and further completely eliminates the resin content by firing. Examples of resins include thermoplastic resins such as polyamide and acrylic resin, polypynyl alcohol, methylcellulose, water-based acrylic,
These are water-resistant resins and hydrophilic resins such as polyvinylpyrrolidone.

The resins for the adhesive layer, ink layer, and release layer that form the transfer layer have been described in detail above. Next, the foaming agent added to each of these layers will be specifically explained. Foaming agents include inorganic foaming agents such as sodium bicarbonate and ammonium bicarbonate, azodicarbonamide, azobisisobutyronitrile, diazoaminobenzene, N・N'-dimethyl N.
Organic blowing agents such as N'-dinitroterephthalamide, benzenesulfonyl hydrazide, p-toluenesulfonyl hydrazide and the like are suitable. The foaming agent is used to generate air bubbles in the transfer coating film through a foaming process such as heating, and to form fine pores throughout the transfer layer, which increases water absorption during pongee application, shortens the pongee application time, and improves the pongee application process. There are some that allow uniform wetting of the drug onto the transfer layer.

Among the above-mentioned blowing agents, inorganic blowing agents such as ammonium carbonate, sodium bicarbonate, and ammonium bicarbonate, which generate carbon dioxide gas and easily generate open cells, exhibit great effects.
Note that the effective amount of the foaming agent to be contained in each of the adhesive layer, ink layer, and release layer constituting the transfer layer is within 10% by weight based on the resin component constituting each layer. The transfer paper constructed as described above is transferred to the ceramic/tile base surface by applying the adhesive layer to the corner porcelain/tile base surface with the base material side as the pressure and heating side.

Next, in the case of a transfer tile to which a foaming agent has been added, the transfer layer of the transferred tile is foamed using a method such as a dry oven or a gas flame. This creates fine pores in the entire transfer layer, which further improves the uniform wetting of the pongee into the transfer layer during pongee application, further improves water absorption, and further reduces the pongee application time. It is something to do. Next, the pongee hanging process will be explained.

The transfer paper according to the present invention may contain at least one of water-soluble salts and surfactants in the transfer layer in consideration of wetting of the pongee liquid onto the pattern surface when applied to the Yuzukake. To hang pongee on ceramics and tile substrates with transferred pictures using this transfer paper, use a mixture of pongee medicine and water or a solution prepared by adding a surfactant to pure medicine and water as a dispersion mixture. In particular, when using the latter mixed solution (containing a surfactant), the additives contained in the transfer layer can sufficiently exhibit their effects, allowing the transfer layer to contain thermoplastic resins, thermosetting resins, Even when an oil-soluble resin is used, this liquid mixture wets the patterned surface very well, and the pongee medicine is evenly applied to the patterned surface of the ceramic or tile base. Here, nonionic surfactants are good as surfactants to be added to water when mixing water and pongee medicine, and effects are observed even when the amount added is less than 10% by weight based on the amount of water added. . In addition,
When using a water-soluble resin or hydrophilic resin for the transfer layer, a mixture of the former pongee agent and water is sufficient for pongee hanging on the transferred pattern surface of ceramics, tile substrates, etc.; You can get a workmanship product. In order to fire ceramics/tiles that have been hung with pongee as described above, it is preferable to perform the firing at a maximum temperature of 1,000 to 1,300° C. with a heating time of 10 to 2 hours.

During the heating process, the resin component of the transfer layer is decomposed and removed at around 300 to 500°C, and the temperature is further raised to bake the pongee. According to this method, if the decomposition and removal of the resin component and the imitation of the pure chemical are performed in the same process, the decomposition and removal of the resin component and the citron firing process can be performed in the same process, and the decomposition and removal process of the resin component and the citrus firing process can be performed in the same process. There is no need to separate it into two parts, which improves work efficiency. Examples will be described below.

Example 1 Structure of transfer paper 1) Release layer 2) Ink layer 3) Adhesive layer The above composition is printed on a polyester film in the order of release layer, ink layer, and adhesive layer to obtain a transfer paper.

The twilled layer was placed on a tile base, and a rubber roller heated to about 230° C. was pressed from the polyester film side to apply transfer decoration. After the transfer was completed, the patterned tile base was heated to 100 qo for 5 minutes to foam the transfer layer, and then pongee was hung with a mixture of water and pongee medicine, and then with a mixture of yuzu medicine. Furthermore, when the temperature was raised to a maximum of 1200 qo in a firing furnace at a heating rate of 120 qo/hour, a tile product with good pattern reproducibility was obtained. Example 2 Transfer painting was applied on the tile base using the transfer paper of Example 1,
After completion of the transfer, as in Example 1, this patterned tile base was heated to 100% and 0% for 5 minutes, and then soaked in water to which 1% by weight of a nonionic surfactant was added. Pongee hanging was performed using a mixed solution with pongee medicine, and firing was carried out under the same firing conditions as in Example 1. A tile product with good pattern reproducibility was obtained.

Unlike conventional methods, the method for producing a sintered body with a pattern of the present invention makes it possible to obtain a uniformly coated aggregate product with good reproducibility without pre-firing, but it is not limited to this. By adding an activator, it was possible to speed up the separation of the soot particles from the dispersed soot on the surface of the substrate after pongee hanging, especially on the surface of the transferred pattern, resulting in a drastic improvement in work efficiency.

Claims (1)

[Claims] 1. A transfer layer of a pattern is transferred onto the base surface of a sintered body using a transfer paper for underpainting, which is provided with a transfer layer containing a foaming agent, and then the transfer layer is heated and foamed. A method for producing a sintered body having a pattern, which further comprises glazing with a mixture of glaze and water and firing. 2 Transfer the pattern transfer layer to the base surface of the sintered body using a transfer paper for underpainting, which is equipped with a transfer layer containing a foaming agent, then heat and foam the transfer layer, and then add it to the glaze and water. A method for producing a sintered body having a pattern, which comprises glazing with a mixed solution of a dispersion medium prepared by adding a surfactant and firing the glaze.