JPH10189230A - Glass container for cooking - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce sticking of a cooking material to the surface of a cooking container by forming a transparent water repellent layer made of a material containing a fluorine element on at least the surface coming in contact with a cooking material. SOLUTION: In a heating cooking device using a halogen heater in a heat- source, a water repellent layer 2 whose main component is fluororesin is formed on a cooking glass container main body 1 by powder coating. Thereby, sticking of a cooking material is reduced, and cleaning is made easy. Since the water repellent layer 2 is transparent, during cooking, heat rays from the halogen heater are not disturbed, the cooking material is uniformly, efficiently heated, and in addition, the cooking material is easily taken out of the container after cooking. Appearance of the cooking glass container is enhanced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cooking glass container used for a cooking device for cooking foods or the like using a halogen heater.

[0002]

2. Description of the Related Art In a conventional heating cooker, a Miraclon heater or a sheathed heater is installed above and below a cooking space as a heat source. In order to efficiently irradiate heat rays emitted from these heat sources to a food, The inner casing is made of a surface-treated steel sheet having excellent reflection characteristics. In general, a cooking tray is formed by pressing an aluminum plate. Further, in order to prevent food from sticking, trays coated with a fluororesin are also used.

However, as foods to be cooked are diversified, various heat sources are being used, and in recent years, foods using a halogen heater have been developed. Halogen heaters emit many wavelengths in the near-infrared region and have excellent heat penetration into cooked foods, so it has been confirmed that they are particularly effective for heating frozen foods. It is expected to increase.

However, when a conventional general cooking tray is used, since the tray is opaque, heat rays from below the cooked food are blocked, and the characteristics of the halogen heater cannot be fully utilized.

[0005] Therefore, it has been developed to use glass capable of sufficiently transmitting near-infrared rays emitted from a halogen heater as a cooking vessel. In this case, since near-infrared rays are directly radiated to the food from the lower heater through the glass container, it is possible to heat and cook uniformly and efficiently.

[0006]

However, in the above-described conventional configuration, the surface of the food is sufficiently heated, so that the food tends to stick to the glass surface. In this case, even if a water-repellent treatment is performed with a general fluororesin paint, the transparency of the glass is impaired, so that the heat rays of the halogen heater are blocked, which is inconvenient. Means such as applying edible oil to the surface of the glass container immediately before cooking can also be considered, but this is also temporary and time-consuming.

An object of the present invention is to solve such a conventional problem, and an object of the present invention is to provide a glass container for cooking in which the sticking of the food to the surface is minimized.

[0008]

In order to solve the above-mentioned problems, the present invention forms a transparent water-repellent treatment layer made of a substance containing elemental fluorine on at least a surface in contact with a food (hereinafter referred to as a cooking surface). Things. By the water-repellent treatment layer,
Without blocking the heat rays from the halogen heater, it is possible to minimize sticking of the food.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention according to claim 1 is one in which a transparent water-repellent treatment layer made of a substance containing a fluorine element is formed on at least a surface of a glass container for cooking in contact with a food, and is usually untreated. It is possible to eliminate sticking of the food to the surface which occurs when heating and cooking with the glass, and to greatly improve the usability such as maintenance.

According to a second aspect of the present invention, the water-repellent treatment layer of the glass container for cooking is formed by powder coating containing a fluororesin as a main component, and the non-adhesiveness and transparency of the surface of the glass container are provided. In order to ensure the above, it can be performed by a general powder coating excellent in workability and productivity.

According to a third aspect of the present invention, the water-repellent treatment layer of the cooking glass container is formed of a dispersion film containing fluorine molecules as a main component, and a thin, more transparent water-repellent treatment film is obtained. It is possible to obtain a product excellent in heat exchange rate and appearance.

According to a fourth aspect of the present invention, the water-repellent treatment layer of the glass container for cooking is formed by chemically bonding a silane coupling agent having fluorocarbon at one end and trichlorosilane at the other end to the glass surface. This silane coupling agent is instantaneously chemically bonded to the glass surface and does not require heat treatment, so that the silane coupling agent is more excellent in adhesion, and can be used with simple production equipment.

According to a fifth aspect of the present invention, there is provided a combination of a heating cooker provided with a halogen heater and the cooking glass container according to any one of the above-mentioned claims, wherein the cooking glass container is provided with a halogen heater. Near infrared heating can be efficiently exhibited.

[0014]

Embodiments of the present invention will be described below with reference to the drawings.

(Embodiment 1) FIG. 1 (a) shows the appearance of a cooking glass container according to Embodiment 1 of the present invention, and FIG. 1 (b) shows a cross section of a cooking surface. Here, 1 indicates a glass container main body, and 2 indicates a water-repellent treatment layer. In this embodiment, the water-repellent layer 2 comprises a primer layer 2a and a top layer 2b.

A method for forming the water-repellent layer 2 will be described below. First, the glass container main body 1 is degreased with a neutral detergent for pretreatment, and sufficiently dried by air blowing.

Next, a primer was applied to the cooking surface to ensure adhesion between the base material and the top layer. Here, transparent coating of 458-500 made by DuPont was performed by an air spray gun. The primer was dried at 150 ° C. for 20 minutes.

Next, a powder coating of a perfluoroalkoxy resin (hereinafter referred to as PFA), which is one of fluororesins, was uniformly applied by an electrostatic coating method. Here, MP powder paint manufactured by Mitsui Dupont Fluorochemicals Co., Ltd.
Performed at 0 ° C. for 45 minutes.

Embodiment 1 of the present invention thus manufactured
The experiment of heating the frozen food was carried out using the glass container for cooking. As the cooked food, one prepared as a gratin material and frozen in a frame of a fixed size was used.

An oven toaster type as shown in FIG. 2 was used as the heating cooker. Here, 3 is a grill, and 4 and 5 are halogen heaters.

As a specific experimental method, the food is placed at the center of the cooking surface of the glass container for cooking, and it is placed on the grill 3.
And heated for a certain period of time. After the cooking was completed, the degree of sticking of the food from the glass container was confirmed. In a conventional glass container that has not been subjected to a water-repellent treatment, this sticking could not be easily removed, but in the glass container of the present invention, the cooked material could be easily removed, and the backwashing was easy.

In this embodiment, a powder coating of PFA is used as a material for the water-repellent treatment, but it goes without saying that any fluororesin coating having transparency after film formation can be used. In addition, although the water-repellent surface is the cooking surface, the present invention is not limited to the cooking surface, and there is no problem even if the water-repellent surface is applied to a surface other than the cooking surface.

(Embodiment 2) FIG. 3 (a) shows the appearance of a cooking glass container according to Embodiment 2 of the present invention, and FIG. 3 (b) shows a cross section of a cooking surface. Here, 1 is a glass container main body, 6 is a water-repellent molecule, and 7 is a silica component.

Hereinafter, a method for forming the water-repellent treatment layer will be described. First, the chemical formula CF ₃ (CF ₂ ) ₇ C ₃ H ₄ (CO
A water-repellent molecule consisting of H ₃ ) ₃ was dispersed in a silica component to prepare a sol solution. The glass container body 1 that had been washed in the same manner as in Example 1 was immersed in this liquid, and was pulled up at a constant speed. This was baked at 300 ° C. for 30 minutes to gel the film to form a water-repellent layer.

Embodiment 2 of the present invention thus manufactured
When the same experiment as in Example 1 was performed using the glass container for cooking in Example 1, the food after cooking could be easily removed.

(Embodiment 3) FIG. 4 (a) shows the appearance of a cooking glass container according to Embodiment 3 of the present invention, and FIG. 4 (b) shows a cross section of a cooking surface. Here, 1 indicates a glass container body, and 6 indicates a water-repellent molecule.

A method for forming the water-repellent layer will be described below. First, the chemical formula CF ₃ (CF ₂ ) ₇ C ₃ H ₄ SiCl ₃
Is prepared by dispersing a certain amount of water-repellent molecules consisting of a silicone solvent (here, KF-994 manufactured by Shin-Etsu Chemical Co., Ltd.), into which a glass container body 1 that has been cleaned in the same manner as in Example 1 is placed. It was immersed for 20 minutes, pulled up at a stretch, and dried sufficiently with nitrogen gas. At this time, a dehydrochlorination reaction occurs instantaneously between the hydroxyl group present on the glass surface and the silanol group of the water-repellent molecule, and the glass surface and the water-repellent molecule are chemically bonded to each other. Good for

Embodiment 3 of the present invention thus manufactured
When the same experiment as in Example 1 was performed using the glass container for cooking in Example 1, the food after cooking could be easily removed.

[0029]

As is apparent from the above description, claim 1
According to the invention described above, since the transparent water-repellent layer made of the substance containing elemental fluorine is formed on the cooking surface, the cooked food after the cooking is easily removed without interrupting the heat rays from the halogen heater during the cooking. It becomes possible.

According to the second aspect of the present invention, since the formation of the water-repellent treatment layer can be performed by a general electrostatic coating, the glass for cooking can be formed by a method excellent in workability and productivity. A container can be obtained.

According to the third aspect of the present invention, since the water-repellent treatment is constituted by a dispersion film containing fluorine molecules as a main component, a thinner and more transparent water-repellent treatment film can be obtained. In addition, it is possible to obtain a glass container for cooking that is more excellent in heat efficiency and appearance.

According to the fourth aspect of the present invention, since the water-repellent film can be chemically bonded to the glass substrate, and no heat treatment is required at the time of the treatment, the adhesion is more excellent and the production equipment Thus, a simple and compatible glass container for cooking can be obtained.

According to the fifth aspect of the present invention, the heating efficiency of the halogen lamp, ie, the heating efficiency of the halogen lamp, that is, the cooking glass container having the transparent water-repellent surface is combined with the heating cooker using the halogen lamp as a heater. Cooking efficiency can be improved.

[Brief description of the drawings]

FIG. 1A is an external view of a cooking glass container according to a first embodiment of the present invention. FIG. 1B is a sectional view of the cooking surface.

FIG. 2 is a cross-sectional view of a cooking device used in an embodiment of the present invention.

3A is an external view of a cooking glass container according to a second embodiment of the present invention. FIG. 3B is a cross-sectional view of the cooking surface.

4A is an external view of a cooking glass container according to a third embodiment of the present invention. FIG. 4B is a cross-sectional view of the cooking surface.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Glass container main body 2 Water-repellent treatment layer 2a Primer layer 2b Top layer 3 Grid 4,5 Halogen heater 6 Water-repellent molecule 7 Silica component

Claims (5)

[Claims] 1. A glass container for cooking, wherein a transparent water-repellent layer made of a substance containing elemental fluorine is formed on the surface in contact with the food. 2. The cooking glass container according to claim 1, wherein the water-repellent treatment layer is formed by powder coating containing a fluororesin as a main component. 3. The water-repellent treatment layer is formed of a dispersion film containing a fluororesin as a main component.
The glass container for cooking according to the above. 4. A water-repellent treatment using a silane coupling agent having fluorocarbon at one end and trichlorosilane at the other end as a water-repellent treatment agent, and chemically bonding the silane coupling agent to the glass surface. The glass container for cooking according to claim 1, wherein a layer is formed. 5. The cooking glass container according to claim 1, which is combined with a heating cooker provided with a halogen heater.