KR101076168B1 - Ceramic tile using inorganic heat-transfer method and process for preparing the same - Google Patents

Abstract

The present invention relates to a ceramic tile of the inorganic thermal transfer method and a method for manufacturing the ceramic tile, in the manufacture of the ceramic tile, the ceramic tile and a method of manufacturing the ceramic pigment, characterized in that the gravure printing on the transfer film and thermally transferred To provide.

Inorganic thermal transfer method, ceramic tile

Description

Ceramic tile using inorganic heat-transfer method and process for preparing the same}

The present invention relates to a ceramic tile transferred using a gravure printing ink composition capable of thermal transfer of a printed layer formed by a gravure method and a method of manufacturing the same. And it relates to a ceramic tile and a method of manufacturing the same ensuring the optimum operating conditions.

Gravure printing has the advantage of being able to express vivid and various patterns, high speed and continuous printing, and mass production. However, the ink used for gravure printing has a low viscosity and has fluidity, and since it contains an organic solvent, there is a disadvantage in that its use is limited due to a problem such as a risk of fire.

On the other hand, as a printing method of ceramic tiles, printing methods such as screen printing, silicon roll printing, or water transfer printing are used, but only repeating the same pattern and printing monotonous patterns are possible, print quality is deteriorated, and mass production is limited. There is a problem that there is.

In Korean Patent Publication No. 1997-69398, in order to smooth the surface of a ceramic tile substrate, an epoxy resin is applied to form an undercoat layer, and an adhesive layer for the undercoat layer is formed thereon. A gravure printing ink layer is printed, and a layer of the print layer adhesive having the same composition as that of the bottom layer adhesive is applied on the bottom layer adhesive layer and thermally transferred. Then, the film is removed. Disclosed is a ceramic tile having a clear and diverse pattern, characterized by forming an included transparent coating layer.

Japanese Laid-Open Patent Publication No. 1998-114197 discloses a transfer sheet image for painting porcelain products, characterized in that a reverse phase is formed on the transfer sheet by a toner containing a thermoplastic resin, a charge control agent and an inorganic pigment as a main component by an electrostatic image development method. Is disclosed.

Japanese Patent Application Laid-Open No. 1996-109727 discloses a tile characterized in that a resin-impregnated glass fiber layer, a transfer pattern layer, and a transparent surface layer are formed on a substrate.

SUMMARY OF THE INVENTION An object of the present invention is to provide a ceramic tile having a natural natural appearance by improving printing reality and minimizing repeating patterns through inorganic ink gravure printing in printing ceramic tiles and a method of manufacturing the same.

In order to achieve the above object, the present invention provides a ceramic tile including a ceramic base layer, a glaze layer, a binder layer and a transfer printing layer from below.

The ceramic tile of the present invention preferably comprises a surface treatment agent layer between the glaze layer and the binder layer, in particular, by applying a polyvinyl alcohol (PVA) -based surface treatment agent, the glaze generated in the process of removing the transfer film film after thermal transfer The delamination of the layer can be eliminated.

In the present invention, the thickness of the surface treating agent layer is about 5 μm, particularly preferably 3 to 7 μm. At higher thicknesses, the optimum coating thickness is important because it is carbonized and volatilized with the binder layer during firing.

In the present invention, the binder layer by using an acrylic resin, the adhesion between the inorganic ink and the binder, and the binder and the surface treatment agent is released, and the inorganic ink and the oil surface is melted (melting) by playing a role that is easily volatilized at the initial firing.

In the present invention, the thickness of the binder layer is preferably 10 to 15 μm. If the thickness of the binder layer is too thick, the optimum coating thickness is important because the inorganic ink is burned off with the binder during firing.

In the present invention, the transfer printing layer is preferably made of an inorganic ink composition for gravure printing.

In the present invention, the inorganic ink composition for gravure printing is preferably 10 to 20% by weight of the binder resin, 50 to 70% by weight of the inorganic pigment and 20 to 30% by weight of the organic solvent, wherein the binder resin is an acrylic resin, and the inorganic pigment is glass It is preferable to include a glass frit.

In addition, the present invention comprises the steps of preparing a transfer layer; Preparing a ceramic base layer; Forming a glaze layer on the ceramic base layer; Coating a binder on the glaze layer to form a binder layer; Transferring the transfer layer to the binder layer to form a transfer printed layer; And it provides a method for producing a ceramic tile comprising the step of firing.

In the present invention, the transfer layer is preferably formed by printing an inorganic ink composition on a transfer substrate in a gravure manner. By using gravure printing method, it is possible to express vivid and various patterns, and has the advantage of high speed, continuous printing, and mass production.

In the present invention, it is preferable to use a gravure printing roll having a diameter of 2,000 to 3,000 mm in gravure printing. Compared to the conventional printing method, the roll diameter is 1,500 mm, and as the diameter of the gravure printing roll used in the present invention is larger, the repeating pattern can be minimized than other printing methods.

In the present invention, by molding and drying the ceramic base layer in the manufacturing step of the ceramic base layer, it is possible to implement a higher strength through the drying process than the strength of the ceramic base layer in the oil state (7 N / ㎜). When the strength of the ceramic base layer is low, breakage of the base layer occurs due to a force or pressure received during thermal transfer plywood, which can be solved through a base layer drying process. In addition, after the glaze layer is formed, it may be dried to achieve strength in the transfer plywood.

The ceramic tile of the present invention can obtain the appearance of naturally implementing an image such as natural stone through the improvement of printing reality and minimizing the repeating pattern through the inorganic ink gravure printing method.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

1 is a cross-sectional view of a ceramic tile according to the present invention, which is composed of a ceramic base layer 10, a glaze layer 20, a surfactant agent layer 30, a binder layer 40, and a transfer printing layer 50 from below. .

The ceramic base layer 10 is made of general ceramic tile material of magnetic or ceramic material, and has a thickness of 8 to 10 mm.

The glaze layer 20 is a glaze layer having a thickness of less than 3 mm, which is generally applied to magnetic and ceramic ceramic tiles. The glaze layer 20 minimizes product deformation during firing by using a composition having a similar coefficient of thermal expansion to the base layer. Glaze layer 20 may further improve the physical properties such as water resistance and chemical resistance of the tile, the glaze may be appropriately selected in consideration of the firing temperature according to the raw materials used, for example magnetic oil and ceramics Oil may be used, and specifically, white glaze such as feldspar, quartz, limestone, kaolin and borax may be used.

The surface treatment agent layer 30 serves to bond with the binder layer 40 and to prevent the glaze layer 20 from falling off. The surface treatment agent is preferably PVA, which is a water-soluble polymer, and the thickness of the volatilized carbon during firing. In order to prevent this, it is preferable to form about 5 μm, especially 3 to 7 μm.

The binder layer 40 serves to bond the layers by improving the adhesion between the inorganic ink of the surface treatment agent layer 30 and the transfer printing layer 50, and the binder resin included in the transfer printing layer 50 as a binder. It is preferable to use acrylic resin in order to improve compatibility and adhesiveness with (acrylic resin), and the thickness is preferably 10 to 15 µm for preventing carbonation volatilization.

The transfer printing layer 50 is a printing layer formed by the gravure method is made of a gravure printing ink composition capable of thermal transfer.

The gravure printing ink composition constituting the transfer printing layer 50 is characterized by containing a specific binder resin, an inorganic pigment and an organic solvent. This printing ink composition includes the above components, thereby preventing loss of the pigment due to heat generated during thermal transfer or post-transfer firing during gravure printing, thereby enabling efficient gravure printing.

As a binder resin used for the gravure printing ink composition, an acrylic resin is preferable, for example, methyl methacrylate can be used. The binder resin is preferably contained in an amount of 10 to 20% by weight in the ink composition for printing, but if it is less than 10% by weight, the viscosity of the ink may be too low, making it difficult to adhere to the printed material, and 20% by weight When it exceeds, there exists a possibility that the color sense of a printed layer may fall.

Inorganic pigments have low solubility in solvents and are pigments that are applied to the targets as they are, so even when gravure printing is applied to the base of ceramics, it is possible to base a clear and diverse pattern without losing the pigments due to heat generated in the firing process. Can be transferred to Conventionally, when the inorganic pigment is applied to the ink composition for printing, the softness is reduced, the state of the ink composition is stiff, and thus cannot be applied to gravure printing. However, in the present invention, the above problems can be solved by optimizing the binder resin and the organic solvent. .

As an inorganic pigment, it is preferable to contain glass frit as a main component. Glass frits (silica, alumina) have the advantage of sintering. Inorganic pigments may also be used in addition to glass frits, for example iron oxide, carbon black, lead chromate, iron oxide yellow, cadmium yellow, titanium titanium, chromium orange, molybdenum orange, iron oxide red, light roster, cadmium red, manganese violet, , Navy blue, cobalt blue, chrome green, emerald green, metallic luster pigment (aluminum powder, silver powder, bronze powder), fluorescent pigment (zinc sulfide), pearl luster pigment (basic lead carbonate, bismuth oxychloride, mica titanium), pollution prevention Conventional pigments known in the art, such as pigments (zinc, copper oxide) and anti-corrosion pigments (photo list, zinc chromate). The content of the inorganic pigment is preferably 50 to 70% by weight, of which glass frit is preferably present in an amount of 50% by weight. If the content of the inorganic pigment is less than 50% by weight, there is a fear that the color is pale, if the content of more than 70% by weight there is a fear that the adhesion does not occur easily.

The organic solvent solves the increase (stiffness) of the viscosity of the ink composition due to the use of the inorganic pigment so that the ink composition can be efficiently applied to gravure printing. MIBK (methyl isobutyl ketone), MEK (methyl ethyl ketone), etc. can be used as an organic solvent. The content of the organic solvent is preferably 20 to 30% by weight in the ink composition. When the content is less than 20 parts by weight, the viscosity of the ink composition may be excessively increased, making it difficult to apply to gravure printing. This decreases the dryness and economics.

Hereinafter, the manufacturing method of the ceramic tile according to the present invention will be described in detail.

First, a transfer layer is produced. Specifically, using the inorganic ink composition for gravure printing to form a printing layer on the transfer substrate by a gravure printing method to prepare a transfer layer. A transfer film is used as a transfer base material.

In gravure printing, it is preferable to use a gravure printing roll having a diameter of 2,000 to 3,000 mm, for example, a diameter of 2,400 mm.

Next, the ceramic base layer 10 is manufactured. The ceramic base layer 10 is prepared through press molding or the like after mixing the ceramic raw materials.

Minimal substrate layer strength is required for thermal transfer operations. When the moisture in the glaze component is absorbed by the ceramic raw material, the strength drops to about 7 N / mm 2, and thus, it is unable to withstand the pressure applied during the transfer plywood.

In order to solve this problem, by molding and drying the ceramic base layer 10, a higher strength (13 N / mm 2) may be realized through a drying process than the strength of the ceramic base layer 10 in a see-through state. In addition, after the glaze layer 20 is formed, it may be dried for realizing strength during transfer plywood (thermal transfer).

Next, the glaze layer 20 is formed by pouring it on the ceramic base layer 10. Seeding consists of a first and a second stage.

Next, the surface treating agent layer 30 is formed on the glaze layer 20. Apply a surfactant (PVA) to prevent glaze from printing.

Next, a binder is coated on the surface treating agent layer 30 to form a binder layer 40. The organic binder is treated to produce a plywood force between the transfer ink and the glaze-treated ceramic substrate layer 10. The binder treatment may be composed of first and second binder treatment steps.

If the coating thickness of the binder layer 40 is thick, the optimum coating thickness (10 to 15 μm) is important because the inorganic ink is burned off with the binder during firing.

As the organic binder, an acrylic resin is preferable. The resin has an adhesive force between the inorganic ink and the binder, and the binder and the surface treatment agent, and the inorganic ink and the oil surface are fused by playing a role of volatilization at the initial stage of firing.

Next, the transfer layer is transferred to the binder layer 40 to form a transfer printing layer 50. After applying the organic binder and transferring the plywood through thermal transfer, the printing layer of the transfer layer is transferred to the binder layer 40 to form the transfer printing layer 50. The transfer temperature is preferably 140 to 160 ° C and the transfer pressure is less than 13 N / mm 2.

Finally, firing completes the ceramic tile according to the invention. The firing temperature is 1100 ° C. or higher for ceramic tiles, and 1000 ° C. for ceramic tiles.

1 is a cross-sectional view of a ceramic tile according to the present invention.

DESCRIPTION OF THE REFERENCE NUMERALS

10: ceramic base layer

20: glaze layer

30: Surfactant layer

40: binder layer

50: transfer printing layer

Claims (13)

In the ceramic tile comprising a ceramic base layer, a glaze layer, a binder layer and a transfer printing layer from below, the transfer printing layer is composed of an inorganic ink composition for gravure printing, the inorganic ink composition for gravure printing is 10 to 20% by weight of a binder resin , 50 to 70% by weight of an inorganic pigment and 20 to 30% by weight of an organic solvent. The ceramic tile according to claim 1, further comprising a surface treating agent layer between the glaze layer and the binder layer. The ceramic tile according to claim 2, wherein the surface treating agent layer is made of polyvinyl alcohol (PVA) and has a thickness of 3 to 7 µm. The ceramic tile according to claim 1, wherein the binder layer is made of acrylic resin and has a thickness of 10 to 15 µm. delete delete The ceramic tile according to claim 1, wherein the binder resin is an acrylic resin, and the inorganic pigment comprises glass frit. Preparing a transfer layer; Preparing a ceramic base layer; Forming a glaze layer on the ceramic base layer; Coating a binder on the glaze layer to form a binder layer; Transferring a transfer layer formed by printing an inorganic ink composition on a transfer substrate in a gravure manner using a gravure printing roll having a diameter of 2,000 to 3,000 mm to a binder layer to form a transfer printing layer; And Method of producing a ceramic tile comprising the step of firing. delete delete The method of manufacturing a ceramic tile according to claim 8, wherein the ceramic base layer is molded and dried in the step of manufacturing the ceramic base layer. The method of claim 8, wherein after the glaze layer is formed, the ceramic tile is dried to realize strength in the transfer plywood. The method of manufacturing a ceramic tile according to claim 8, wherein an interfacial agent layer is formed between the glaze layer and the binder layer.

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