KR20190115243A - Non-stick composite for a cooking utensil and the bonding method of non-stick layer on the surface of cooking utensil using thereof - Google Patents

Abstract

The present invention relates to a composition for forming a nonstick layer on the cooking surface of cookware in order to prevent foods from sticking, and a method for joining a nonstick layer to a cooking surface of cookware, and more specifically, to a nonstick composition for cookware and a method for joining a nonstick layer to a cooking surface of cookware using the same. According to the present invention, a base of the composition is composed of the following three ingredients: titanium carbide powder or a colloid solution inducing strong bonding with the surface of a base substrate, which is primarily formed to constitute external appearance of cookware by using a titanium plate or a stainless steel plate; silicon dioxide powder or a colloid solution inducing strong binding between compositions; and aluminum oxide powder or a colloid solution reinforcing heat resistance of a nonstick layer. In addition, zirconium and/or silicon nitride powder or a colloid solution is mixed with the base at a predetermined ratio in order to ensure corrosion resistance and proper hardness, thereby producing a nonstick composition. Next, the composition is coated on a cooking surface of the base substrate by using a spray and then, heated and dissolved to produce a nonstick layer strongly bonded to the surface of the base substrate. Accordingly, a high-performance nonstick layer having excellent surface strength, in which scratching or peeling hardly occurs, is formed on the surface of cookware by an easy and simple method. Compared to conventional aluminum cookware where ceramic or Teflon is coated on a primer, a product according to the present invention can be used almost semi-permanently and is eco-friendly by not including substances harmful to a human body.

Description

Non-stick composite for a cooking utensil and the bonding method of non-stick layer on the surface of cooking utensil using approx}

The present invention relates to a composition for forming a non-stick layer that prevents food from sticking to a cooking surface of a kitchen cooking utensil, and a method for bonding it to the cooking surface of the cooking utensil. As a raw material, a highly functional non-stick layer with excellent surface strength that hardly causes scratches or peelings can be formed on the surface of the cooking utensil in a very easy and simple manner, and conventional aluminum cooking coated with ceramic or Teflon on the primer The present invention relates to a non-stick composition for cooking utensils and a method for combining non-stick layers on the surface of cooking utensils using the same, which can be used almost semi-permanently compared to utensils, but which can provide an eco-friendly product containing no harmful ingredients.

In general, kitchen utensils, such as a frying pan, a meat plate or a pot or wok, used for cooking various foods, are cooked in a shape of a frying pan or a meat plate or a wok or wok using aluminum material having excellent heat conductivity. After making the main body of the instrument first, attach additional handles and the like on the main body, and form a non-stick coating layer that prevents food from adhering to the cooking surface of the main body. do.

As a representative example of the non-stick coating layer applied to the cooking surface of the kitchen cookware as described above may be a ceramic coating layer and a Teflon coating layer, but if the coating layer is formed on the cooking surface of the kitchen cookware based on aluminum material In addition, the adhesive strength between the aluminum material and the coating layer was weakened, so that the coating layer was easily scratched or peeled off, which caused a food to stick to the cooking surface even though some period of use has not passed since the purchase of the cookware. .

Therefore, in restaurants where frequent use of cooking utensils and frequent cleaning operations are performed, the service life of the cooking utensils is very short, and the cooking utensils themselves need to be replaced with new ones even if the coating surface of the cooking surface is damaged. In addition to the burden, Teflon is a kind of perfluorinated compound, which contains PFOA (Perfluorooctanoic Acid), an environmental pollutant that is harmful to the human body, and recently, the toxicity problem of aluminum is also highlighted. It is anticipated that some restrictions or restrictions will be placed on the use of aluminum cookware.

In particular, in order to form a ceramic coating layer or a Teflon coating layer on the cooking surface of an aluminum cooking utensil, a chemical substance as a primer for enhancing adhesion between the surface of the aluminum cooking utensil and the coating layer is used. Inevitably, when the primer or component is exposed to high temperatures while the ceramic or Teflon coating layer is scratched or peeled off, a large amount of environmental hormones that are harmful to the human body are released. It is a threat.

Due to the problems of the aluminum cooking utensils as described above, the kitchen cooking utensils made of cast iron material is emerging again, but the cookware of cast iron material, which is dependent on the casting molding method, cannot be mass-produced, so the price of the product is relatively high. Of course, the surface of the cookware is easily rusted or corroded, causing problems in hygiene. Cast iron itself is a heavier material than aluminum, which requires frequent use of the cookware and frequent cleaning. In restaurants, additional problems such as a significant decrease in utilization have emerged.

Republic of Korea Patent Publication No. 10-2009-0118347

The present invention has been made to solve the conventional problems as described above, titanium carbide powder or colloid to induce a firm bond with the surface of the base material formed primarily to form the appearance of the cookware using a titanium plate or stainless steel plate Based on the three components of the solution, the silicon dioxide powder or colloidal solution to induce a firm bond between the composition, and the aluminum oxide powder or colloidal solution for enhancing the heat resistance of the non-stick layer, the zirconium to ensure corrosion resistance and hardness And / or a powder or colloidal solution of silicon nitride is mixed at a predetermined ratio to prepare a non-stick composition, which is sprayed onto the cooking surface of the base material, heated and dissolved to form a non-stick composition strongly bonded to the surface of the base material. By forming a stick layer, scratches and peeling hardly occur. The high-performance non-stick layer with excellent surface strength can be formed on the surface of cookware in a very easy and simple way, and can be used almost semi-permanently compared to conventional aluminum cookware coated with a primer on ceramic or Teflon. The main technical problem is to provide a non-stick composition for cooking utensils and a method for combining non-stick layers on the surface of cooking utensils using the same, which can produce an eco-friendly product containing no harmful ingredients to the human body.

The non-stick composition for cooking utensils according to the present invention as a means for solving the above technical problem, 20 to 30wt% of titanium carbide (Tic) powder, 20 to 30wt% of silicon dioxide (SiO2) powder, aluminum oxide (Al2O3) 10-15 wt% of powder and 35-40 wt% of zirconium (Zr) powder; Alternatively, 20-30 wt% of titanium carbide (Tic) powder, 20-30 wt% of silicon dioxide (SiO2) powder, 20-30 wt% of aluminum oxide (Al2O3) powder, and 20-30 wt% of silicon nitride (Si3N4) powder ; Or 20 to 30 wt% of titanium carbide (Tic) powder, 15 to 22 wt% of silicon dioxide (SiO2) powder, 15 to 22 wt% of aluminum oxide (Al2O3) powder, 15 to 22 wt% of zirconium (Zr) powder, and silicon nitride (Si3N4) 15-22 wt% of a mixed composition with powder; It is characterized in that the alternative, the powder particle size of the individual components constituting each of the mixed composition is characterized in that it is within the range of 0.5 ~ 1.5 microns (Micron, 1 / 1000mm).

As another embodiment of the non-stick composition for cookware according to the present invention, 20 to 30 wt% of a colloidal solution of titanium carbide (Tic), 20 to 30 wt% of a colloidal solution of silicon dioxide (SiO 2), and a colloid of aluminum oxide (Al 2 O 3) 10-15 wt% of a solution, and 35-40 wt% of a colloidal solution of zirconium (Zr); Or 20 to 30 wt% of a colloidal solution of titanium carbide (Tic), 20 to 30 wt% of a colloidal solution of silicon dioxide (SiO 2), 20 to 30 wt% of a colloidal solution of aluminum oxide (Al 2 O 3), and a colloid of silicon nitride (Si 3 N 4) Mixed composition with 20-30 wt% of solution; Or 20 to 30 wt% of a colloidal solution of titanium carbide (Tic), 15 to 22 wt% of a colloidal solution of silicon dioxide (SiO 2), 15 to 22 wt% of a colloidal solution of aluminum oxide (Al 2 O 3), and a colloid of zirconium (Zr) A mixed composition of 15 to 22 wt% of a solution and 15 to 22 wt% of a colloidal solution of silicon nitride (Si 3 N 4); An alternative one of the above, or alternatively, one of the mixed compositions based on 100 wt% of an alternative alcohol solution among ethyl alcohol (C 2 H 5 OH), methyl alcohol (CH 3 OH), and isopropyl alcohol ((CH 3) 2 CHOH) The composition is characterized in that diluted by the addition of 20 to 40wt% ratio.

In addition, the non-stick layer bonding method of the surface of the cooking utensil according to the present invention, using a titanium plate or a stainless steel plate having a thickness of 0.5 ~ 1.5mm for cooking of the base material primary molded to form the appearance of the cooking utensil for the kitchen The non-stick composition applying step of applying a non-stick composition of the non-stick composition described above on the surface by a spray method, and the base material subjected to the non-stick composition applying step at a temperature of 200 ~ 350 ℃ 10-30 minutes It characterized in that it comprises a non-stick layer bonding step of heating, the thickness of the non-stick layer bonded to the cooking surface of the base material in the non-stick layer bonding step is in the range of 0.5 ~ 1.5 microns (Micron, 1 / 1000mm) Characterized in that the inside, the cooking surface of the base material is a nonce through sandblasting treatment performed before the non-stick composition applying step It characterized in that the composition to the surface for the bonding layer.

According to the present invention as described above, it is possible to firmly bond the non-stick layer to prevent the adhesion of food even without applying a separate primer on the surface of the titanium or stainless steel material which is very light in weight, excellent in strength and excellent in corrosion resistance. By replacing the existing cooking utensils made of cast iron with titanium or stainless steel, it is possible to eliminate the shortcomings of the cooking utensils at once, and the organic composition of titanium carbide, zirconium and / or silicon nitride Through the linkage, it provides the effect of forming a highly functional non-stick layer on the surface of the cookware made of titanium or stainless steel, which has excellent surface strength and hardly scratches or peels off.

Through this, unlike conventional aluminum cookware applied with a ceramic coating layer or Teflon coating layer can be used almost semi-permanently, there is an effect of providing an eco-friendly cookware that implements a non-stick layer with only ingredients harmless to the human body without applying a primer, It is very easy and simple to apply non-stick composition, which is a fine powder or colloidal solution, onto the cooking surface of the base material formed by using titanium plate or stainless steel plate in order to achieve the external appearance of the cooking utensil by spraying it As the non-stick layer can be formed in such a manner, cost reduction by mass production can be achieved, and thus, various effects which are very advantageous for improving the quality of the cookware products for the kitchen and securing external competitiveness are provided.

1 is a process block diagram showing a manufacturing process of a cooking utensil including a non-stick layer bonding method according to the present invention.

Hereinafter, the present invention for achieving the above object in more detail as follows.

The non-stick composition for cookware according to the present invention is based on three components of titanium carbide (Tic: Titanium Carbide), silicon dioxide (SiO 2: Silicon Dioxide), and aluminum oxide (Al 2 O 3: Aluminum Oxide), and thus zirconium (Zr). : Zirconium) or silicon nitride (Si3N4: Silicon Nitride) may be mixed with the three components in a predetermined ratio, or zirconium (Zr: Zirconium) and silicon nitride (Si3N4: Silicon Nitride) may be fixed with the three components. It is prepared by mixing in proportion.

More specific examples, the non-stick composition according to the present invention is 20 to 30wt% of titanium carbide (Tic) powder, 20 to 30wt% of silicon dioxide (SiO2) powder, 10 to 15wt% of aluminum oxide (Al2O3) powder and , Mixed composition with zirconium (Zr) powder 35-40 wt% (first embodiment); Or 20-30 wt% of titanium carbide (Tic) powder, 20-30 wt% of silicon dioxide (SiO2) powder, 20-30 wt% of aluminum oxide (Al2O3) powder, and 20-30 wt% of silicon nitride (Si3N4) powder ( Second embodiment); Or 20 to 30 wt% of titanium carbide (Tic) powder, 15 to 22 wt% of silicon dioxide (SiO 2) powder, 15 to 22 wt% of aluminum oxide (Al 2 O 3) powder, 15 to 22 wt% of zirconium (Zr) powder, and silicon nitride ( Si3N4) mixed composition with 15 to 22 wt% of powder (third embodiment); It becomes one of them.

The titanium carbide (Tic) is produced by mixing sugar with high-speed titanium powder reduced titanium oxide to hydrogen and heated to a high temperature, the non-stick composition according to the invention of the base material for cookware made of titanium or stainless steel It is a component that performs a function of firmly bonding to the cooking surface, and thus the mixing ratio of titanium carbide from the first embodiment to the third embodiment becomes equal to 20 to 30 wt%, and carbonization for each embodiment When the mixing ratio of titanium is less than 20wt%, there is a fear that the binding force of the non-stick layer to the cooking surface of the base material may decrease, and even if the mixing ratio of titanium carbide exceeds 30wt%, the nonstick to the cooking surface of the base material The bond strength of the layer does not increase in proportion to it, but rather, the mixing ratio of the other main components is relatively reduced to provide a highly functional non-stick layer. It may result in a failed direct result.

In addition, the silicon dioxide (SiO2) is also called silica (Silica), a component that performs a function of inducing a strong bond between the non-stick composition according to the present invention, as in the first and second embodiments in total 4 In the case of producing the non-stick composition with eggplant components, the mixing ratio is 20-30 wt%, and in the case of producing the non-stick composition with the total of five components as in the third embodiment, the mixing ratio is 15- It is 22wt%, which corresponds to the compounding ratio for optimizing the physical properties required for the non-stick layer, while ensuring the maximum bonding strength between the non-stick composition while not relatively reducing the mixing ratio of the other major components.

In addition, the aluminum oxide (Al2O3) is a white powder produced by burning aluminum hydroxide, which is a representative refractory material. In the present invention, the heat resistance of the non-stick layer according to the characteristics of the cooking utensil used under high temperature conditions. When the non-stick composition is prepared with four components containing zirconium, which is added in the same manner as in the first embodiment and has excellent strength, corrosion resistance, and heat resistance, the mixing ratio of aluminum oxide is 10 to 15wt%. By lowering and increasing the mixing ratio of zirconium to the level of 35 to 40wt%, the heat resistance of the zirconium component is linked with the heat resistance of aluminum oxide to ensure sufficient heat resistance, and the strength and corrosion resistance of zirconium is also applied to the non-stick layer. It is desirable to allow sufficient expression over time.

On the contrary, when the non-stick composition is prepared from four components containing silicon nitride in place of zirconium as in the second embodiment, the bonding force between the base material and the non-stick layer, the bonding force between the non-stick composition, strength and corrosion resistance, and heat resistance It is preferable to adjust the mixing ratio of the four components within the range of 20 to 30wt% and to adjust the mixing ratio of each component to the same level within the corresponding range for uniform expression of physical properties over the impact and impact resistance. Likewise, in the case of preparing the non-stick composition with five components including zirconium and silicon nitride, as in the third embodiment, the mixing ratios of all four components except titanium carbide are all used for uniform expression of the non-stick layer properties. It is desirable to adjust the mixing ratio of the four components to the same level within the range of 15 to 22wt% and at the same time. .

As described above, zirconium (Zr) as an additional component of the non-stick composition of the present invention based on three components of titanium carbide, silicon dioxide and aluminum oxide is a silver gray glossy metal which is reduced or fused by ZrCl 4 by chromium method. It is manufactured by growing crystals from zirconium. It is a material with excellent high temperature strength and corrosion resistance, and silicon nitride (Si3N4) as another additional component is a white powder which is insoluble in water made of silicon and nitrogen. ) It is a representative high-temperature structural ceramic material with excellent chemical resistance and chemical resistance. Titanium carbide (for base material bonding), silicon dioxide (for composition bonding) and aluminum oxide ( By mixing with components of heat-resistant material, high performance with excellent strength, corrosion resistance, heat resistance and impact resistance Which will be implemented stick layer.

In the first to third embodiments described above, each component constituting the non-stick composition has a powder form, and the powder particle size of each component constituting the non-stick composition is 0.5 to 1.5 microns (Micron). , 1 / 1000mm) is preferable, because the thickness of the non-stick layer bonded to the cooking surface of the base material for cookware using the non-stick composition according to the present invention is 0.5 to 1.5 micron level In addition, the electrostatic spray coating method, which is a kind of powder coating method, enables the rapid and accurate composition of the non-stick layer thickness required.

In other words, when the powder particle size of each component constituting the non-stick composition according to the present invention is less than 0.5 micron, the powder coating operation should be repeatedly performed two to three times for the composition of the non-stick layer having the required thickness. When the powder particle size of each component constituting the stick composition exceeds 1.5 microns, since the non-stick layer is bonded to the cooking surface of the base material for the cookware, additional polishing treatment on the surface of the non-stick layer may be required. It is not preferable in terms of performing the manufacturing process more quickly and easily.

As described above, it is also possible to mix each component constituting the non-stick composition of the present invention in the form of a powder, but recently, components which are insoluble in water or other solvents, such as metals, are also in the form of nano colloidal solutions. Since the components of the non-stick composition according to the present invention are also manufactured in the form of a colloidal solution, the homogeneous mixing and easy handling and management of the non-stick composition are achieved. In addition, spray application to the cooking surface of the base material can be performed more easily and accurately, and the mixing ratio of each component to be in a colloidal solution and the reason for limitation of the mixing ratio are described in the above-mentioned powder-type non-stick. The same as the composition.

In other words, 20 to 30 wt% of a colloidal solution of titanium carbide (Tic), 20 to 30 wt% of a colloidal solution of silicon dioxide (SiO 2), 10 to 15 wt% of a colloidal solution of aluminum oxide (Al 2 O 3), and zirconium (Zr) A mixed composition with a colloidal solution of 35 to 40 wt% (Example 4); Or 20-30 wt% of a colloidal solution of titanium carbide (Tic), 20-30 wt% of a colloidal solution of silicon dioxide (SiO 2), 20-30 wt% of a colloidal solution of aluminum oxide (Al 2 O 3), and a colloidal solution of silicon nitride (Si 3 N 4) 20 to 30 wt% of a mixed composition (Example 5); Or 20 to 30 wt% of a colloidal solution of titanium carbide (Tic), 15 to 22 wt% of a colloidal solution of silicon dioxide (SiO 2), 15 to 22 wt% of a colloidal solution of aluminum oxide (Al 2 O 3), and a colloid of zirconium (Zr) A mixed composition of 15 to 22 wt% of a solution and 15 to 22 wt% of a colloidal solution of silicon nitride (Si3N4) (Sixth Example); It means that it becomes an alternative of.

The colloidal solution of each component described above is a dispersion medium in the presence of a dispersant having a molecular weight of 200 to 30000 in the form of particulates having a particle size of 200 nm (Nano meter) or less, preferably in the form of particulates of about 10 ± 5 nm. It is dispersed in a mixed solvent of water and a water-soluble organic solvent. Even during long-term storage, the particles that make up each component make a large aggregate (lump) and are dispersed evenly throughout the mixed solvent without being precipitated (tangled or salted). Preference is given to using colloidal solutions prepared at levels which can be as high as possible.

If necessary, the mixing according to the fourth to sixth embodiments is performed based on 100 wt% of an alternative alcohol solution in ethyl alcohol (C 2 H 5 OH), methyl alcohol (CH 3 OH), and isopropyl alcohol ((CH 3) 2 CHOH). It is also possible to use a dilution by adding one of the mixed composition in the composition at a ratio of 20 to 40wt%. Thus, volatilization characteristics of alcohol when diluting each mixed composition (non-stick composition) in the alcohol solution are used. By using the non-stick composition and the non-stick layer bonding operation on the cooking surface of the base material can be performed more easily and uniformly.

The alcohol solution mentioned above lists the most suitable types for dilution and spray application of the non-stick composition according to the present invention. When the amount of addition of the non-stick composition to each alcohol solution is less than 20wt%, it is suitable for cooking the base material. There is a risk of unnecessarily delaying the time until the volatilization of the alcohol component after the spray application of the non-stick composition to the surface, and when the amount of the non-stick composition added to each alcohol solution exceeds 40 wt%, 0.5 It is not preferable because the work of uniformly forming a thickness of the coating film for forming a thin non-stick layer of ˜1.5 microns on the cooking surface of the base material may be somewhat difficult.

Hereinafter, the process according to the present invention for bonding the non-stick layer to the surface of the cooking utensil using the non-stick composition as described above will be described in detail with reference to FIG. 1.

Prior to performing the non-stick layer bonding method of the surface of the cookware according to the present invention, a base material preparation step of primary molding of the base material having the external shape of the cookware should be accompanied, and the material preparation step may have a predetermined thickness. The shearing step of inserting a titanium plate or a stainless steel plate into a press mechanism to form a disc, a square plate, or a polygonal plate having the required dimensions, and the titanium plate or stainless steel plate subjected to the shearing step to a hydraulic molding machine. It is carried out through the hydraulic molding step of inserting the steel sheet into the base material of the cookware shape by the input, and the washing step of the base material through the hydraulic molding step.

Titanium plate or stainless steel plate used in the base material preparation step preferably has a thickness of about 0.5 ~ 1.5mm that is commonly applied to kitchen cooking utensils, thinner or thicker in consideration of the purpose or use conditions of the cooking utensils. A plate may be used, and the shearing step corresponds to a known shear press process, and a disc or a polygonal plate is blanking (press work to cut a predetermined shape from a material and use it as a product). The rectangular plate is preferably formed by cutting-off (press work for cutting the material in a regular arrangement so that no scrap is generated).

In addition, the hydraulic molding step is also put into a titanium plate or a stainless steel plate formed through a sharing step between the upper mold and the lower mold manufactured according to the appearance (main body) shape of the cooking utensils, and then using a hydraulic cylinder By pressing the upper mold to the lower mold side, it is a well-known step for forming the steel sheet to form a base material of a cookware main body such as a frying pan, a meatless plate or a pot or a wok, and a cookware having a somewhat complicated pattern such as a meatless plate. In the case of additionally installing a cutting blade or the like at any position of the upper mold and the lower mold, punching (punching) or cutting of a portion of the steel sheet may be performed simultaneously with the hydraulic molding.

In addition, the washing step is a well-known step for removing various foreign substances including press oil, processing oil, metal powder, etc., which may be attached to the surface of the base material according to the shearing step and the hydraulic molding step. For example, an ultrasonic cleaning method in which a base material is introduced into a cleaning tank in which a cleaning solution is stored, and an ultrasonic vibrator installed at the bottom side of the cleaning tank is used to clean the base material. Various surface cleaning methods, such as the spraying method of the cleaning liquid, may be applied.

The cleaning liquid used in the ultrasonic cleaning method as described above may be removed as long as the oil component can be removed, such as soap liquid. The temperature of the cleaning liquid is preferably 50 ± 5 ° C. and the cleaning time is 20 to 40 minutes. When the cleaning time using ultrasonic waves is less than 45 ° C or less than 20 minutes, it is difficult to sufficiently remove foreign substances on the surface of the base material having a somewhat complicated pattern such as a meat plate, and the cleaning temperature exceeds 55 ° C, It is uneconomical in view of cleaning efficiency that the cleaning time using ultrasonic waves exceeds 40 minutes.

Even more preferably, by going through a known sand blasting step for the cooking surface of the base material between the hydraulic molding step and the washing step, fine and irregular irregularities over the entire cooking surface of the base material ) To form a pattern, and through such a preliminary surface treatment, the cooking surface of the base material is formed in a more favorable state for bonding the non-stick layer, thereby further increasing the bonding force of the non-stick layer.

After all the preparation steps of the base material are completed in the above manner, the process according to the present invention is performed, and the main process of the present invention is the powder-type non-stick according to the first to third embodiments described above. The non-stick composition which applies to the cooking surface of a base material the spraying method of the composition or the colloidal solution type nonstick composition which concerns on 4th-6th Example, or the non-stick composition which diluted the colloidal solution to alcohol solution. And a non-stick layer bonding step of heating the base material subjected to the non-stick composition applying step to a predetermined temperature so that the non-stick composition is strongly bonded to the cooking surface of the base material.

In the non-stick composition applying step, the coating of the powdery non-stick composition on the cooking surface of the base material may be a typical example of corona electrostatic spray coating, which is a kind of powder coating method, which is negative (-) under high voltage conditions. This is a method of spraying the charged powder onto the grounded plated object and attaching it electrically. Since the powder attached to the plated material has high electrical resistance and is difficult to discharge, the powder is not separated from the plated material during setting. However, when the powder is attached to a certain level of thickness, the powder is not attached to a higher thickness due to the repulsive force between the powders, so that the thickness of the powder coating film to the plated object is uniform.

However, in addition to the corona electrostatic spray coating method described above, if the non-stick composition in the form of fine powder can be applied to the cooking surface of the base material with a predetermined thickness, it will be clear that any of the known powder coating methods may be used. Colloidal solution-type non-stick compositions or non-stick compositions diluted in alcoholic solutions are in liquid form, while each component is composed of nano-level microparticles. It is sufficient to spray the composition on the surface by microspraying, that is, in the form of a mist.

The non-stick layer joining step performed after the non-stick composition applying step as described above is carried out by inserting the base material coated with the non-stick composition onto the cooking surface into the inside of the heat treatment furnace. After raising to the range of 200 ~ 350 ℃, it is carried out by the process of maintaining the base material for 10 to 30 minutes under the corresponding temperature conditions, if the powder type non-stick composition is applied to 20 ~ 30 at a temperature condition of 250 ~ 350 ℃ It is preferable to hold | maintain for 10 to 20 minutes under 200-250 degreeC temperature conditions, when it hold | maintains for a minute and apply | coating a colloidal solution type non-stick composition or the non-stick composition which diluted this in alcohol solution.

In other words, the base material coated with the powdered non-stick composition is maintained for 20-30 minutes at a temperature of 250-350 ° C. to ensure sufficient heating and dissolution of the composition and penetration time into the surface of the base material. Since the non-stick composition or the non-stick composition diluted in the alcohol solution has an excellent penetration rate compared to the powder-type non-stick composition, the base material to which the composition is applied has a higher heating temperature than the base material to which the powder-type non-stick composition is applied. Even if it is lowered to the level of 200 ~ 250 ℃ and the holding time is reduced to about 10 to 20 minutes, it is possible to obtain a non-stick layer equivalent to the powder-type non-stick composition.

In this step, the heating temperature and the holding time provided for each type of non-stick composition (powder, colloidal solution) are optimal ranges such that the highly functional non-stick layer is strongly bonded to the cooking surface of the base material while maintaining its physical properties. If the heating temperature and the holding time are less than the suggested range, the adhesion of the non-stick layer to the surface of the base material may be lowered. If the heating temperature and the holding time are more than the suggested range, the non-stick due to excessive heating and oxidation This is undesirable because a change in the physical properties of the layer can be caused.

In addition, the heat treatment furnace used in this step may be any type that can be heat-treated in a large amount by loading dozens to hundreds of base materials at a time, as a representative example, dozens to hundreds of base materials are arranged at regular intervals It has a room-type processing room equipped with an opening / closing door to allow the frame frame holder to be introduced into the interior thereof, while heating means such as an electric heater, a high frequency heater, or a ceramic heater installed inside the processing room is provided outside the processing room. One example is the installation of a temperature control system for operation.

The thickness of the non-stick layer formed on the cooking surface of the base material through the non-stick layer bonding step is preferably to form a thin film of about 0.5 to 1.5 microns as described above, because the weight of the cooking utensil and Although the non-stick layer has a thin film of about 0.5 to 1.5 microns, its strength, corrosion resistance, heat resistance and impact resistance are four times higher than those of the conventional Teflon coating layer or ceramic coating layer. Various experiments confirmed that the improvement, and the non-stick layer itself expresses a beautiful color of gray (gray) or dim gray (dim gray) series, thereby increasing the commercial value of the cooking utensils. It could also contribute to the side.

After the non-stick layer bonding step as described above, by opening and closing the door of the heat treatment furnace to remove the tens to hundreds of base materials combined with the non-stick layer to the outside of the heat treatment furnace with the frame frame holder, and then the corresponding base material It is left to cool at room temperature along with the frame frame holder, and after cooling the base material at room temperature, the surface of the non-stick layer is wiped by using a soft material made of fiber such as burlap, abrasion or various fabrics. Gloss is given to the surface of the non-stick layer, and the surface of the base material other than the non-stick layer is subjected to a finishing process of sandblasting or polishing.

After the finishing treatment step as described above, the washing step of removing foreign matter by spraying the washing water at room temperature on the surface of the base material, and additional means such as a handle necessary for cooking utensils on the base material based on the completed base material to the base material The final production of cookware products that can be used by connecting them and, if necessary, by going through the known product manufacturing steps such as painting or metal printing for the exterior's beauty on the remaining surface of the base material except the cooking surface. This is done.

According to the present invention as described above, it is possible to firmly bond the non-stick layer to prevent the adhesion of food even without applying a separate primer on the surface of the titanium or stainless steel material which is very light in weight, excellent in strength and excellent in corrosion resistance. By replacing the existing cooking utensils made of cast iron with titanium or stainless steel, the shortcomings of the cookware can be eliminated at once, and the surface is organically connected through titanium carbide, zirconium and / or silicon nitride. A highly functional non-stick layer that is extremely strong and hardly scratches or peels off can be formed on the surface of cookware made of titanium or stainless steel.

Through this, unlike the conventional aluminum cookware applied with a ceramic coating layer or Teflon coating layer can be used almost semi-permanently, but can provide an eco-friendly cookware that implements a non-stick layer with only ingredients harmless to the human body without applying a primer, titanium Very easy and simple way to apply non-stick composition, which is a fine powder or colloidal solution, by spraying to the cooking surface of the base material that is primarily molded to form the appearance of the cookware by using a plate or stainless steel plate. As a non-stick layer can be formed, cost reduction by mass production can also be achieved.

Ultimately, it is possible to provide a non-stick composition having a number of advantages that are very advantageous in terms of improving the quality of kitchen cookware products and securing external competitiveness. Titanium material was able to secure superior bonding and physical properties of non-stick layer than stainless steel material, and stainless steel material could provide non-stick layer with better function than Teflon coating layer or ceramic coating layer applied to existing aluminum cookware. The present invention will be more clearly understood by the following practical application.

(Real Application Example 1): 25 wt% of titanium carbide powder, 25 wt% of silicon dioxide powder, and 15 wt% of aluminum oxide powder were prepared on the cooking surface of the base material primarily molded into the appearance of the frying pan using a titanium plate having a thickness of 1 mm. After applying the non-stick composition mixed with 35 wt% of zirconium powder by corona electrostatic spraying method, the base material was charged into a heat treatment furnace and maintained at 300 ° C. for 30 minutes to maintain a non-stick layer on the cooking surface. To get

(Practical application example 2): 25 wt% of a colloidal solution of titanium carbide and 25 wt% of a colloidal solution of silicon dioxide on the cooking surface of a base material formed by using a stainless steel plate having a thickness of 1.5 mm to form an outer appearance of a wok. %, 25 wt% of a colloidal solution of aluminum oxide, and 25 wt% of a colloidal solution of silicon nitride were applied by atomization using a sprayer, and then the base material was charged into a heat treatment furnace to obtain a temperature of 250 ° C. By maintaining for a minute, a base material having a non-stick layer bonded to the cooking surface was obtained.

(Practical application example 3): A base material was first formed by using a titanium plate having a thickness of 1 mm according to the appearance shape of the meat plate, while 20 wt% of a colloidal solution of titanium carbide, 20 wt% of a colloidal solution of silicon dioxide, and aluminum oxide were used. 20 wt% of a colloidal solution of 20 wt%, a colloidal solution of zirconium and 20 wt% of a colloidal solution of silicon nitride were mixed, and a non-stick composition was prepared by adding and mixing 35 wt% of the mixed composition based on 100 wt% of methyl alcohol. The non-stick composition prepared as described above was sprayed onto the surface of the base material by spraying, and then charged into a heat treatment furnace and maintained at a temperature of 200 ° C. for 15 minutes to form a non-stick layer bonded to the cooking surface. To get

Claims (7)

In the composition for forming a non-stick layer to prevent food from sticking to the cooking surface of the kitchen cooking utensils,
The composition comprises 20 to 30 wt% of titanium carbide (Tic) powder, 20 to 30 wt% of silicon dioxide (SiO 2) powder, 10 to 15 wt% of aluminum oxide (Al 2 O 3) powder, and 35 to 40 wt% of zirconium (Zr) powder. Mixed composition;
Alternatively, 20-30 wt% of titanium carbide (Tic) powder, 20-30 wt% of silicon dioxide (SiO2) powder, 20-30 wt% of aluminum oxide (Al2O3) powder, and 20-30 wt% of silicon nitride (Si3N4) powder ;
Or 20 to 30 wt% of titanium carbide (Tic) powder, 15 to 22 wt% of silicon dioxide (SiO 2) powder, 15 to 22 wt% of aluminum oxide (Al 2 O 3) powder, 15 to 22 wt% of zirconium (Zr) powder, and silicon nitride (Si3N4) 15-22 wt% of a mixed composition with powder; Non-stick composition for cooking utensils, characterized in that the alternative. The non-stick composition for cooking utensil according to claim 1, wherein the powder particle size of the individual components constituting the mixed composition is in a range of 0.5 to 1.5 microns (Micron, 1/1000 mm). In the composition for forming a non-stick layer to prevent food from sticking to the cooking surface of the kitchen cooking utensils,
The composition comprises 20 to 30 wt% of a colloidal solution of titanium carbide (Tic), 20 to 30 wt% of a colloidal solution of silicon dioxide (SiO 2), 10 to 15 wt% of a colloidal solution of aluminum oxide (Al 2 O 3), and zirconium (Zr) A mixture composition with 35 to 40 wt% of a colloidal solution;
Or 20 to 30 wt% of a colloidal solution of titanium carbide (Tic), 20 to 30 wt% of a colloidal solution of silicon dioxide (SiO 2), 20 to 30 wt% of a colloidal solution of aluminum oxide (Al 2 O 3), and a colloid of silicon nitride (Si 3 N 4) Mixed composition with 20-30 wt% of solution;
Or 20 to 30 wt% of a colloidal solution of titanium carbide (Tic), 15 to 22 wt% of a colloidal solution of silicon dioxide (SiO 2), 15 to 22 wt% of a colloidal solution of aluminum oxide (Al 2 O 3), and a colloid of zirconium (Zr) A mixed composition of 15 to 22 wt% of a solution and 15 to 22 wt% of a colloidal solution of silicon nitride (Si 3 N 4); Non-stick composition for cooking utensils, characterized in that the alternative. 4. The non-stick composition according to claim 3, wherein the non-stick composition is an alternative of each mixed composition based on 100 wt% of an alternative alcohol solution among ethyl alcohol (C 2 H 5 OH), methyl alcohol (CH 3 OH) and isopropyl alcohol ((CH 3) 2 CHOH). The non-stick composition for cooking utensils, characterized in that the mixture is diluted by the addition of 20 to 40wt% of the composition. In the method for forming a non-stick layer to prevent food from sticking to the cooking surface of the base material primary molded to achieve the external shape of the kitchen cooking utensil,
The base material is made of a titanium plate or a stainless steel plate having a thickness of 0.5 ~ 1.5mm, the non-stick composition according to any one of claims 1 to 4 on the cooking surface of the base material by spraying Using a non-stick composition, characterized in that it comprises a non-stick composition applying step, and a non-stick layer bonding step of heating the base material subjected to the non-stick composition applying step 10 to 30 minutes at a temperature of 200 ~ 350 ℃ Non-stick layer bonding method of cookware surface. The non-stick composition according to claim 5, wherein the thickness of the non-stick layer bonded to the cooking surface of the base material in the non-stick layer bonding step is in a range of 0.5 to 1.5 microns (Micron, 1/1000 mm). Non-stick layer bonding method of the cookware surface using. The paddy of the cooking utensil surface using a nonstick composition according to claim 5, wherein the cooking surface of the base material is formed as a nonstick layer bonding surface through sandblasting treatment performed before the nonstick composition applying step. Stick layer bonding method.

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