KR101978393B1 - Glaze composition and cooking vessel producted using the same - Google Patents

Abstract

The present invention relates to a glaze composition and a kitchen utensil produced using the same. The glaze composition of the present invention comprises minerals, clay, limestone, leafy feldspar, lithium carbonate, cobalt, manganese, iron oxide, and chromium oxide. The glaze composition induces cooking in a short period of time by using high thermal conductivity, and thus the nutrient destruction of foods is minimized. In the case of meats, the glaze composition enables to raise the flavor of the meats by utilizing juice.

Description

[0001] The present invention relates to a glaze composition and a cooking container made using the glaze composition,

The present invention relates to a glaze composition and a kitchen cooking container made using the glaze composition. More particularly, the present invention relates to a glaze composition, And to increase the flavor of meat, and a kitchen cooking container manufactured using the glaze composition.

Generally, glaze means glassware, which is coated and adhered to the surface of ceramic, metal plate, and interior and exterior tiles. The glaze is treated on the surface of the substrate and fired to form a glass layer, which imparts gloss and impermeability to the substrate surface, increases the strength of the substrate surface, and increases resistance to water and chemicals.

In recent years, these glazes have also been used outside the kitchen cooking utensils for cooking food. In general, glaze for ceramics is lead oxide from a vessel made of lead oxide, and lead is accumulated in the human body when used as a food container, And thus the use of these glazes has been studied. As a result, studies have been conducted on glazes not containing lead, and many types of lead-free glazes have been developed.

However, a compound such as a metal oxide used in a lead-free glaze is not easy to use due to its high price, and there has been a glaze using natural ore as a main material in the past, but the raw material thereof is a material containing silicon oxide (SiO ₂ ) Feldspar was used to produce glazes. In addition to not only grinding the ore to a proper particle size but also removing impurities, it is rarely used at present.

1. Korean Registered Patent No. 10-0846146, entitled " Multi-colored, high-strength heat-resistant ceramic bead composition and glaze composition used therein " 2. Korean Patent Laid-Open Publication No. 10-2008-0103642 'A method for producing a glaze composition using a pine needle and a glaze composition obtained according to the method' 3. Korean Patent Registration No. 10-0648864 'Coating Method of Kitchen Cooking Container Using Charcoal Coating Composition'

The present invention relates to a glaze composition which induces cooking within a short period of time by using a high thermal conductivity to inhibit nutrient destruction of foods and increase the flavor of meat by utilizing juice in case of meat, and a glaze composition The purpose is to provide a container.

In order to achieve the above object, the glaze composition of the present invention is characterized by comprising minerals, clay, limestone, leafy lime, lithium carbonate, cobalt, manganese, iron oxide and chromium oxide.

Wherein the glaze composition comprises 50 to 70 wt% of the mineral, 5 to 10 wt% of the clay, 5 to 10 wt% of the limestone, 10 to 20 wt% of the limestone, 1 to 5 wt% of the lithium carbonate, The content of cobalt is 1 to 2% by weight, the content of manganese is 1 to 5% by weight, the content of iron oxide is 3 to 6% by weight and the content of chromium oxide is 1 to 2% by weight. 600 mu m.

The mineral may contain 20 to 25 wt% of silicon (Si), 6 to 8 wt% of aluminum (Al), 3 to 5 wt% of calcium (Ca), 3 to 5 wt% of iron (Fe) (K) 2 to 3% by weight, magnesium (Mg) 1 to 2% by weight and sodium (Na) 0.5 to 1% by weight.

Another embodiment of the present invention is characterized in that the cooking cavity is manufactured by coating with the glaze composition, The kitchen cooking container is characterized in that it is at least one of a baking dish, a rice cooker, and a freepen.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are not intended to limit the invention to the particular embodiments that are described. It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are not restrictive of the invention, There will be.

The present invention provides a glaze composition which induces cooking in a short period of time by using a high thermal conductivity to inhibit nutrient destruction of foods and to increase the flavor of meat by utilizing juice in the case of meat, A kitchen cooking vessel is provided.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a diagram showing an ingredient analysis chart measured according to ICP-AES test analysis method of mineral-stone powder (base) as an effective ingredient contained in the glaze composition of the present invention. FIG.
2 is a view showing a test report measuring far-infrared emissivity and radiant energy of a mineral-stone powder (base) as an effective ingredient contained in the glaze composition of the present invention.
3 is a graph showing the results of analyzing components of a glaze composition according to Example 1 of the present invention.
Fig. 4 is a view showing a blanket applied with a glaze composition according to Example 1 of the present invention. Fig.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail, and a detailed description of known functions and configurations that may unnecessarily obscure the gist of the present invention will be omitted.

The glaze composition of the present invention is characterized by providing a glaze composition and a kitchen cooking container manufactured using the glaze composition. More specifically, the glaze composition may be selected from the group consisting of minerals, clay, limestone, leafy lignite, lithium carbonate, cobalt, manganese, Characterized in that it is very suitable for use as a glaze for use in coating the surface of a container requiring a high thermal conductivity.

Hereinafter, the glaze composition of the present invention will be described in detail.

(Major composition of glaze composition)

1. Active Ingredients: Minerals

Mineral is a homogeneous crystalline solid with a regular chemical composition and a very regular atomic arrangement, so far, 4000 kinds of minerals have been found so far. Among these minerals, there are more than 20 kinds of minerals commonly found in rocks, mostly oxygen and silicon, and minerals containing iron or magnesium are known to have a dark color.

Often, the purpose of applying the glaze is not only to make the product beautify by lustering the surface of the container, but also to increase the strength, to make the surface smooth and to prevent the contamination of the surface. In addition, the glaze shows an effect of increasing the resistance to water and chemicals by blocking the absorption characteristics on the surface of the container. Among the glaze components used in the past, there is a problem that the lead component is harmful to the human body. In recent years, glaze compositions which are environmentally friendly and which release harmful components to human body due to the use of minerals and which release far-infrared rays and anions and maintain freshness of foods are being preferred.

Accordingly, in the present invention, the mineral is applied as an effective component of the glaze composition. In order to have a higher thermal conductivity, as shown in the ICP-AES test analysis result of FIG. 1, 24.5 wt% of silicon (Si) 6.88 wt.% Of aluminum (Al), 3.49 wt.% Of calcium (Ca), 3.59 wt.% Of iron (Fe), 2.28 wt.% Of potassium K, 1.16 wt.% Of magnesium Mg and 0.80 wt. The remaining manganese (Mn). It is best to apply minerals composed of boron (B), chromium (Cr), lithium (Li), nickel (Ni), strontium (Sr), vanadium (V) and zinc (Zn). The above-mentioned minerals are minerals that have not been known to date. The inventors of the present invention have named the minerals of the above-mentioned constitution as 'bases', and when they are used as an active ingredient of glaze compositions, they are used as glaze of containers requiring high thermal conductivity Respectively. As shown in FIG. 2, as a result of checking the far-infrared emissivity and the radiant energy of the 'basem', the emissivity was 0.921 μm and the radiant energy was 4.89 × 10 ² W / m ^{2. As a result} , It is possible to radiate far-infrared rays beneficial to the human body and obtain the desired effect of the present invention.

Further, the particle size of the mineral is 300 to 600 mu m, more preferably 400 to 500 mu m. If the particle size of the mineral powder is less than 300 탆, the fine powder is easily scattered and the workability is lowered and the aggregation phenomenon occurs to lower the mixing property with the following materials. When the particle size of the mineral powder exceeds 600 탆 , The overall specific surface area of the mineral powder may be reduced and the effect of the mineral powder may be reduced.

2. Clay

Clay is a collection of fine particles of natural acid, and plasticity occurs when water is added, and when it is dried, it shows elasticity. Therefore, when clay is added in water-containing glaze, viscosity is increased due to improvement of plasticity And it is advantageous to apply it with a certain thickness, and when it is dried after applying the glaze, it plays a role of providing rigidity.

Accordingly, the content of the clay is important in the present invention. In this case, the clay should be included in an amount of 5 to 10% by weight based on the total weight of the composition, so that the effect of the present invention can be expected . In other words, when the content of the clay is less than 5% by weight, the viscosity of the clay is lowered, so that the bonding force with the container to be coated is lowered and the clay does not function as a glaze. When the content exceeds 10% by weight, So that the inherent color of the container can not be emitted.

3. Limestone (imestone)

The limestone is a component which imparts a smooth feeling of luster and flexibility to the container through which the glaze composition of the present invention is coated and fired through emulsion action so that the effect of the present invention can be dissipated without hindering the efficacy of other materials. It is preferable that it is contained in an amount of 5 to 10% by weight based on the total weight of the composition. In other words, when the content of limestone is less than 5% by weight, the gloss and flexibility imparted thereto are inferior. When the content of the limestone exceeds 10% by weight, the viscosity becomes strong and the color change becomes large.

4. Petalite (petalite)

Leafite (petalite) is lithium minerals and has a very low coefficient of thermal expansion. It regulates the thermal expansion coefficient through adjustment of the amount of use and strengthens the thermal shock performance to withstand rapid temperature changes. Although the ferrite is excessively used as a glaze material, it has a disadvantage that when the ferrite is excessively added, the refractory of the heat-generating container is deteriorated and the thermal expansion coefficient is large, so that it is rather weakened by thermal shock. In the present invention, the feldspar may be contained in an amount of 10 to 20% by weight based on the total weight of the composition. If the content of the feldspar is less than 10% by weight, the plasticity is lowered There is a problem in that the defective rate is increased in the molding process, and when it exceeds 20% by weight, the material cost is increased and it is weakened by heat shock rather than being suitable for the kitchen cooking container used as a heat-

5. Lithium carbonate

Lithium carbonate (Li ₂ CO ₃ ) improves the durability of the glaze. That is, when lithium carbonate is added, ions having a small ion size move freely in the crystal lattice in the object and promote heat transfer It plays a role. As a result of the promotion of heat transfer, the thermal stress that is often generated inside the material is remarkably reduced, thereby creating a strong thermal shock characteristic by rapid heat and quenching, and at the same time, it plays a role of performing a pebble function to be well dissolved in water.

Therefore, the lithium carbonate should be contained in an amount of 1 to 5% by weight based on the total weight of the composition, so that the above effects can be expected without interfering with the efficacy of other materials. When the content of lithium carbonate is less than 1% by weight It is difficult to use it as a glaze and it is difficult to use it as a glaze agent in a kitchen cooking vessel such as a bull plate. If it exceeds 5 wt%, heat resistance is good, There is a problem that the surface is not smooth and is poorly formed after the glaze treatment.

6. Cobalt and iron oxide

Cobalt and iron oxide are physical enhancers which improve the acid resistance and tackiness of the glaze composition. In order not to deteriorate the color tone or transparency when used as a glaze material, the cobalt is used in an amount of 1 to 2 wt% , And the iron oxide is contained in an amount of 3 to 6% by weight based on the total weight of the composition. In other words, when the content of cobalt is less than 1 wt%, the acid resistance and the adhesive property are not improved and the synergistic effect of the additive material is not obtained. When the content is more than 2 wt% There is a risk of reducing the color of the image itself.

If the content of the iron oxide is less than 3% by weight, the acid resistance and the adhesive property are not improved, and the synergistic effect of the additive material is not obtained. When the content of the iron oxide exceeds 6% by weight, There is a fear that the color tone is lowered.

7. Manganese and chromium oxide

Manganese and chromium oxide can diversify the color of the glaze so that the color can be applied according to the user's use. In order to realize the chromaticity from the metallic brown system to the black system, The mixing ratio becomes important. The manganese is most preferably composed of 1 to 5% by weight based on the total weight of the composition and 1 to 2% by weight of the chromium oxide, wherein the content of manganese or chromium oxide is each less than 1% by weight The manganese content is more than 5% by weight or the chromium-free chromium content is more than 2% by weight. When the content of manganese exceeds 5% by weight, There arises a problem that the color tone, transparency, and crack are generated.

(Method for producing glaze of the present invention)

In the present invention, the glaze is characterized by using a glaze composition having the above-described composition. The glaze composition is characterized in that glaze is prepared by adding water together with stirring to the glaze composition.

The glaze composition may be prepared by mixing the glaze composition and water in an agitator at a speed of 150 to 250 rpm for 20 to 40 minutes. When the agitation speed is less than 150 rpm or the stirring time is less than 20 minutes, If the stirring speed exceeds 250 rpm or the agitation time exceeds 40 minutes, the homogenizing effect is not greatly improved, but energy is consumed in a large amount, and the manufacturing time is increased to reduce the efficiency of the manufacturing process .

The mixing ratio of the water and the glaze composition is 1: 0.5-0.7 by weight. This is because when the glaze is applied to the surface of the container, it has excellent spreading power and drying property, so that the glaze composition Is contained in an amount of less than 0.5 part by weight, the amount of water is excessively large, so that it takes a lot of time to dry. When the content is more than 0.7 part by weight, the application is not easy and the glaze is not evenly applied to the surface of the container There is a possibility that a high thermal conductivity may not be achieved uniformly.

The glaze thus produced is characterized by exhibiting a high thermal conductivity. It is suitable to coat the surface of a kitchen cooking vessel requiring a high thermal conductivity and use it. Preferably, the kitchen cooking vessel includes a grill pan, a rice cooker, It is characterized by at least one of the frypen. In particular, When used in hot plate, it is possible to dissipate a high thermal conductivity even if it is applied to the surface without special firing process, thereby inducing cooking in a short period of time, thereby suppressing nutrient destruction of food. In case of meat, . ≪ / RTI >

Hereinafter, the present invention will be described in more detail with reference to Examples and Experimental Examples. However, these Examples and Experimental Examples are for illustrative purposes only and do not limit the scope of protection of the present invention.

≪ Examples 1 and 2, Comparative Examples 1 and 2 >

Glaze compositions were prepared according to the composition ratios shown in Table 1 below.

Based on total 100% by weight Example 1 Example 2 Comparative Example 1
(Another mineral, basalt applied) Comparative Example 2
Mineral 50% by weight of the mineral of Figure 1, 70% < RTI ID = 0.0 > 50 wt% 40% by weight of the mineral of Figure 1, clay 5 wt% 5 wt% 5 wt% 5 wt% Limestone 5 wt% 5 wt% 5 wt% 5 wt% Foliate 20 wt% 10 wt% 20 wt% 30 wt% Lithium carbonate 5 wt% 1 wt% 5 wt% 5 wt% cobalt 2 wt% 1 wt% 2 wt% 2 wt% manganese 5 wt% 1 wt% 5 wt% 5 wt% Iron oxide 6 wt% 6 wt% 6 wt% 6 wt% Chromium oxide 2 wt% 1 wt% 2 wt% 2 wt%

Each of the glaze compositions was mixed according to the composition shown in Table 1, 1000 ml of water and 620 g of the glaze composition were placed in a stirrer, and the mixture was stirred at a speed of 200 rpm for 30 minutes to prepare glaze.

As shown in FIG. 3, SiO ₂ 57.9%, CaO 7.17%, MgO 1.21%, and the like are shown in FIG. 3 as a result of analyzing the components of the glaze of Example 1 prepared in accordance with KS L 3415: 1 glaze is not shown, but it is confirmed that 60 to 70% by weight of SiO ₂ and 0 to 6% by weight of CaO + MgO are based on the components of basalt which have high thermal conductivity. It can be seen that the difference of these components greatly influences the thermal conductivity of the following physical properties.

<Experimental Example 1> Confirmation of Smoothness, Cracking and Thermal Conductivity

1. Experimental Method

The smoothness, the cracking property, and the thermal conductivity were confirmed after one day passed after each of the glazes prepared above was applied to the surface of the hot plate.

As a criterion of smoothness, it was judged to be defective when the oil level was not smooth, and it was judged to be good when the oil level was smooth.

The criteria for cracking were judged to be defective when a crack occurred and to be judged to be satisfactory if no crack occurred.

As a criterion of the thermal conductivity, beef was placed on the same hot plate at the same time, and then cooked for 30 seconds before and after the test. Ten people in each of 20s and 60s were tested for their taste and evaluated by using 9 point scoring method.

2. Experimental results

Example 1 Example 2 Comparative Example 1
(Another mineral, basalt applied) Comparative Example 2
Smoothness amount amount fire amount Cracking property amount amount amount fire Thermal conductivity 8 8.5 5 3

As shown in Table 2, in the case of Comparative Example 1, basalt rock, which is known to have a high thermal conductivity, was applied, and in the case of basalt, mixing with the entire materials was not performed well and smoothness was low. Which is lower than that of Examples 1 and 2. In the case of Comparative Example 2, it was confirmed that the content of leaf feldspar is relatively large, so that cracks are generated after coating and drying on the surface of the hot blanks, and it is confirmed that the thermal conductivity is also low.

On the other hand, in the case of Examples 1 and 2, as shown in FIG. 4, the glaze was smoothly applied on the surface of the blanket to smooth the oil surface, there was no cracking phenomenon even after drying, and the heat conductivity was also high, And the taste evaluation of beef was overall high.

As described above, according to the present invention, a glaze composition which induces cooking within a short period of time by using a high thermal conductivity to inhibit nutrient destruction of food and, in the case of meat, enables to increase the flavor of meat by utilizing juice, and It can be seen that the manufactured kitchen cooking vessel is provided.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention as defined by the appended claims. It will be possible. The scope of the present invention is defined by the appended claims, and all differences within the scope of the claims are to be construed as being included in the present invention.

Claims (6)

delete A mixture of 50 to 70% by weight of minerals, 5 to 10% by weight of clay, 5 to 10% by weight of limestone, 10 to 20% by weight of folium, 1 to 5% by weight of lithium carbonate, 1 to 2% by weight of cobalt, 3 to 6% by weight of iron oxide, and 1 to 2% by weight of chromium oxide,
The mineral contained 24.5 wt% of silicon, 6.88 wt% of aluminum, 3.49 wt% of calcium, 3.59 wt% of iron, 2.28 wt% of potassium, 1.16 wt% of magnesium, , 0.80% by weight of sodium (Na), and the balance manganese (Mn). And is composed of boron (B), chromium (Cr), lithium (Li), nickel (Ni), strontium (Sr), vanadium (V)
Glaze composition.
3. The method of claim 2,
Characterized in that the particle size of the mineral is 300-600 [mu]
Glaze composition.
delete A coating composition prepared by coating with a glaze composition according to any one of claims 2 and 3,
Kitchen cooking vessel.
6. The method of claim 5,
Wherein the cooking utensil is at least one of a baking dish, a rice cooker,
Kitchen cooking vessel.

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