JP2002363774A - Porcelain enameling material for kitchen, production method therefor and using method therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a porcelain enameling material for a kitchen which has excellent durability even in use for parts in the vicinity of a stove and within a grill which are continuously exposed to high temperatures, water, salt or the like, and in which scorched stain can be removed only by lightly rubbing the same with fingers or cloths after immersion into water, a production method therefor, and a using method therefor. SOLUTION: In the porcelain enameling material for a kitchen, a glaze layer is formed on a metallic base material, and the content of zirconium oxide in the glaze layer is >=15%. Further, the content of alkali oxide is <=18%.

Description

DETAILED DESCRIPTION OF THE INVENTION TECHNICAL FIELD OF THE INVENTION

[0001] The present invention relates to a kitchen enamel material used for a soup tray, a burner ring, a water dish of a grill for grilling fish, a method of manufacturing the same, and a method of using the same.

[Prior art]

[0002] In kitchens, kitchens, etc.,
At present, enamel products are mainly used for burnt rings, fish grill grills and other water-prone parts. Conventionally, it has been commonplace to scorch the sticks adhered to these with a brute force using an abrasive or the like.
As a result, a burden is imposed on the maintenance, and the deterioration of the product itself is promoted, so that the life is shortened.

[0003] There are products made of fluororesin that are resistant to sticking, such as kitchen tops, but the parts around the stove and inside the grill that are constantly exposed to water, salt, etc. at higher temperatures than the top are highly durable. Therefore, it was not possible to use a fluororesin-processed product in terms of deterioration such as discoloration and deformation due to heat.

[0004]

Therefore, in the present invention,
It has excellent durability when used in areas such as around stoves and grills where it is constantly exposed to high temperature, water, salt, etc., and removes scorched dirt by rubbing lightly with a finger or cloth after immersion in water An object of the present invention is to provide a possible enamel material for a kitchen, a method for producing the same, and a method for using the same.

[0005]

According to the present invention, in order to solve the above-mentioned problems, a glaze layer is formed on a metal base material, and the content of zirconium oxide in the glaze layer is more preferably 15% or more. Provides an enamel material for kitchens, which is not less than 17%.

Conventionally, zirconium oxide is originally contained to some extent as a constituent in glaze materials used for tiles and enamels. However, the effects described in the present invention have not been found, and only The necessary content was determined and used in view of cost, color tone, strength, durability and the like. For example, the content of zirconium oxide in the frit, which is the raw material of glaze for enamel products used in stoves such as juice trays and grill water trays, is usually 0-3.
%, And 5-10% in a type that is considered to be acid-resistant because it is directly exposed to liquid foods such as pots and kettles.
%. In addition, aside from the use, even the most contained one is 11 to 12%. In the present invention, this content is intentionally increased, preferably to 15% or more, and more preferably to 17% or more, so as to make it much easier to remove burned dirt. In addition, since the surface is a glaze surface, it has excellent durability even when used on a portion such as around a stove or inside a grill that is constantly exposed to high temperature, water, salt, and the like.

[0007] When the dirt attached during cooking is heated and burnt, if the enamel member as the cooking utensil is immersed in water or hot water for an appropriate time, on the glaze surface,
The interface between the glaze and the burnt surface is very inert, probably due to the presence of a large amount of zirconium oxide, which has a very small amount of equilibrium adsorption of OH groups, and its adhesive force is gradually weakened as it is immersed. Since the scorch emerges, the scorch can be easily removed thereafter. When the scorch is weak, it is removed naturally, and when it is firmly scorched, it can be easily removed by lightly rubbing with a sponge or the like. The immersion in water or hot water should take at least one hour, preferably at least three hours.

[0008] In a preferred embodiment of the present invention, the content of alkali oxide is 18% or less, more preferably 15% or less.
Make sure that: By reducing the alkali components such as Na, K, and Li on the surface as much as possible, the effect of making it easy to remove the burnt stain is further enhanced. Conventional frit, which is a raw material of glaze for enamel products used in stoves such as soup trays and grill water trays, usually has a total alkali oxide content of 20 to 30%. Is intentionally reduced, preferably to 20% or less, and more preferably to 15% or less, and it becomes easier to remove burnt stains.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a sectional view schematically showing a kitchen enamel material according to one embodiment of the present invention. In FIG. 1, a glaze layer 2 is formed on the surface of a metal substrate 1 such as stainless steel or a steel plate for an enamel. In the glaze layer 2, the content of zirconium oxide is 15% or more,
It is preferably at least 17%. Further, the content of the alkali oxide is at most 18%, more preferably at most 15%.

A zirconium oxide content of 15% or more;
Since it is preferably 17% or more, it is excellent in preventing sticking. This effect increases as much as possible zirconium oxide is added. However, the content of zirconium oxide is limited by the firing temperature, the appearance, and the durability of the film, and is preferably 25% or less.

[0011] To prepare the above-mentioned enamel material for kitchen, a frit glaze having a zirconium oxide content of 15% or more and an alkali oxide content of 18% or less is applied to a metal substrate, What is necessary is just to bake. As a coating method, a well-known method such as hanging, spray coating, flow coating, roll coating, and dip coating can be used.
The firing temperature is preferably 700 to 900 ° C.

FIG. 2 is a sectional view schematically showing a kitchen enamel material according to another embodiment of the present invention. In FIG. 2, an ordinary coloring glaze layer 3 is formed on the surface of a metal substrate 1 such as stainless steel or a steel plate for an enamel, and a glaze layer 2 is formed thereon. In the glaze layer 2, the content of zirconium oxide is 15% or more, preferably 17% or more. Further, the content of the alkali oxide is at most 18%, more preferably at most 15%.

A zirconium oxide content of 15% or more;
Since it is preferably 17% or more, it is excellent in preventing sticking. This effect increases as much as possible zirconium oxide is added. However, the content of zirconium oxide is limited by the sintering temperature, appearance, and other durability such as the strength of the film. In this embodiment, the content is preferably 25% or less. preferable.

In order to produce the above-mentioned enamel material for kitchen, an ordinary glaze is applied to the surface of the metal base material 1 and the content of zirconium oxide is 15% or more thereon.
After applying a frit glaze having an alkali oxide content of 18% or less, firing may be performed. The usual method of glaze application is curtain, spray coat, flow coat,
Known methods such as roll coating and dip coating can be used. The frit glaze is preferably applied by a method such as curtain coating, spray coating, flow coating, roll coating, or dip coating. As for the method of providing two glaze layers, it is basically preferable to perform two coats and two bake, but if there is no problem, a method such as two coats and one bake can be adopted. The firing temperature is preferably from 700 to 9
00 ° C is good.

FIG. 3 is a schematic view showing a method of using the kitchen enamel material of the present invention. In the case where dirt attached during cooking is heated to the enamel material for kitchen of the present invention and fouling 4 adheres, the enamel member as a cooking utensil is immersed in water or hot water 5 so that the scorch is easily removed thereafter. Easier to do. More specifically, it can be removed by lightly rubbing with a finger or a cloth.

[0016]

Example 1 A frit prepared by setting the content of zirconium oxide to about 17% and the total content of alkali oxides to about 13% was prepared, and a glaze was prepared using the frit. Then, a standard sample of a soup tray, which is one of the enamel members used in the kitchen, was prepared, glazed thereon in a multi-layered form, and fired at 830 ° C. to prepare a sample.

Comparative Example 1 A standard sample of a soup tray as one of the enamel members used in the kitchen was prepared. The frit of the glaze used for this purpose has a zirconium oxide content of about 0.5% and a total alkali oxide content of about 25%.

Comparative Example 2 A frit prepared by setting the zirconium oxide content to about 10% and the total alkali oxide content to about 30% was prepared, and a glaze was prepared using the frit. Then, a standard sample of a soup tray, which is one of the enamel members used in the kitchen, was prepared, glazed thereon in a multi-layered form, and fired at 830 ° C. to prepare a sample.

Evaluation The ingredients to be scorched were soy sauce, sugar, and beaten eggs in a ratio of 1: 1: 1.
What was mixed with was used. This mixture was applied to the juice tray prepared in the example and the juice tray prepared as a comparative example, and heated in a dryer at 260 ° C. for 15 minutes to be completely scorched. This food and the heating condition of 260 ° C. for 15 minutes are a method of a burning test generally performed by a stove maker or the like. After that, it was taken out of the dryer, allowed to cool naturally in a normal room, and then immersed in a sink filled with water used for washing dishes in a sink. One hour later, when this was taken out and compared, in the juice tray of Example 1, the scorching could be removed simply by tracing lightly with a finger, but the standard product of Comparative Example 1 and the juice tray of Comparative Example 2 could not be removed at all. Did not.

Next, in order to examine the durability of these juice trays, they were immersed in boiling water for 5 hours, allowed to dry naturally, and then subjected to the same scorching test. No deterioration was observed with respect to No. 2, and in the juice tray of Example 1, scorching could be removed only by lightly tracing with a finger, but the standard product of Comparative Example 1 and the juice tray of Comparative Example 2 could not be removed at all. .

[0021]

According to the present invention, it has excellent durability even when it is used on a portion of a stove or inside a grill that is constantly exposed to high temperature and water, salt, etc. It becomes possible to provide a kitchen enamel material capable of removing scorched dirt by lightly rubbing with a cloth, a method of manufacturing the same, and a method of using the same.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view schematically showing a kitchen enamel material according to an embodiment of the present invention.

FIG. 2 is a sectional view schematically showing a kitchen enamel material according to another embodiment of the present invention.

FIG. 3 is a schematic view showing a method of using the enamel material for kitchen of the present invention.

[Explanation of symbols]

 1 Metal substrate 2 Glaze layer (added at least 15% zirconium oxide) 3 Normal glaze layer 4 Burnt 5 Water or hot water

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI theme coat ゛ (Reference) F24C 15/14 F24C 15/14 EG (72) Inventor Hideki Kobayashi 2-chome Nakajima, Kokurakita-ku, Kitakyushu-shi, Fukuoka No. 1-1 Toto Kiki Co., Ltd. (72) Inventor Yoshito Taniguchi 2-1-1 Nakajima, Kokurakita-ku, Kitakyushu-shi, Fukuoka F-term in Toko Kiki Co., Ltd. 4B055 AA50 BA14 BA52 BA56 EA06 EA07 EA10 FB04 FB05 FB27 FC12 FE03

Claims (5)

[Claims] 1. A glaze layer is formed on a metal substrate,
An enamel for kitchen, wherein the glaze layer has a zirconium oxide content of 15% or more. 2. The enamel material for kitchen according to claim 1, wherein the content of the alkali oxide is 18% or less. 3. A method for producing a kitchen enamel material, which comprises applying a frit glaze having a zirconium oxide content of 15% or more to a metal base material and firing the metal base material. 4. A frit glaze having a zirconium oxide content of 15% or more and an alkali oxide content of 18% or less is applied to a metal substrate and then fired. Manufacturing method of enameled wood. 5. When the dirt adhered to the kitchen enamel member according to claim 1 or 2 during cooking is heated and scorched, by immersing the enamel member as a cookware in water or hot water, A method of using enamel for kitchen, characterized in that it is easy to remove the burn afterwards.