JPH09164082A - Cooking device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pot excellent in hot oil resistance and hardly slipped by forming a film baked with a mixture of a polytetrafluoroethylene resin at a specific ratio, a polyether sulfone resin, and a pigment as main components at the specific temperature on the surface of a metal base material on the pot. SOLUTION: A mixture of a polytetrafluoroethylene resin at the ratio of 10-10wt.% within the resin component, a polyether sulfone resin, and a pigment as main components is baked at the temperature of 320-350 deg.C on the surface of a metal base material to obtain a film 2, and the film 2 is formed on a pot. Pinholes on the surface of the film 2 are eliminated, the surface can be made smooth, and there is no problem when a frying pot is used at a high temperature. Aluminum powder, carbon, or iron oxide is used for the pigment, the pigment content is set to 50-120wt.% or above of the resin component, and the characteristics of the film 2 such as abrasion resistance and mold releasing property can be maintained.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cooker for mainly cooking tempura and the like, and more particularly to a pot having a coating film having excellent heat resistant oil resistance.

[0002]

2. Description of the Related Art Conventionally, a fluorine resin which is excellent in heat resistance and releasability is often used in a coating film formed on a pot made of a metal base material, and a polytetrafluoroethylene resin (hereinafter abbreviated as PTFE) which has high heat resistance Has been used a lot. A similar resin coating is also used on the portion of the pot that contacts the cooker body, but the pot itself was slippery due to the slipperiness of PTFE itself.

Further, as the fluororesin coating, a two-coat type of a primer layer and a top layer is generally used in order to secure the adhesion to the base material, and a one-coat type is also used if necessary. . In addition, in the 1-coat type, polyether sulfone resin (hereinafter abbreviated as PES) and PTF
E is the main component, and the content of PTFE is 50w of the resin component.
Around t% is generally used.

[0004]

However, although a film containing a large amount of PTFE has excellent heat resistance and releasability, the surface of the PTFE film is not suitable for use in a frying pan where it is constantly exposed to oil at high temperatures. There was a problem that the oil penetrated into the film due to the pinholes present in the film, the film was deteriorated such as swelling, and the hardness of the film surface was lowered to easily scratch the film. Further, there is a problem that the pan is slippery during cooking.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a cooker using a pot having a coating film excellent in heat resistant oil resistance. Another object of the present invention is to provide a safe and easy-to-use cooker that prevents the pan from slipping during cooking.

[0006]

In order to solve the above-mentioned problems, the cooking device of the present invention comprises PTFE, PES and a pigment as main components on the surface of a base material, and the ratio of the PTFE is 10 of the resin component.
The cooker uses a pan having a coating film formed by firing at a temperature of 320 to 350 ° C.

Further, the pigment content of the coating film is 50 to 120 wt% of the resin component at least in the installation portion of the cooker body.
%, And a cooker using a pot having a coating film formed by using at least one of aluminum oxide and silicon carbide as a pigment in the coating film.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION The invention according to claim 1 is such that a metal base material surface is mainly composed of a polytetrafluoroethylene resin, a polyether sulfone resin and a pigment, and the ratio of the polytetrafluoroethylene resin is the resin component. 10-40 wt%
Since the cooker uses a pan having a coating formed by firing at a temperature of 320 to 350 ° C., it is possible to provide a cooker using a pan having a coating excellent in heat resistant oil resistance.

According to a second aspect of the present invention, the pigment content of the coating film is at least 50% of the resin component at least at the portion where the cooker body is installed.
Since the cooker uses a pan on which a coating film of 120 wt% is formed, it is possible to provide a safe and convenient cooker in which the pan does not slip during cooking without affecting the heating efficiency.

The invention according to claim 3 is a cooker using a pan in which at least one of aluminum oxide and silicon carbide is used as a pigment in the film, and therefore the pan is further cooked during cooking. It is possible to provide a safe, easy-to-use cooker that is non-slip.

Generally, the 2-coat type has a top layer P
Since the content of TFE is almost 100%, it is excellent in heat resistance and releasability, but it is inferior in oil resistance due to the presence of many fine pinholes on the surface of the coating film. On the other hand, PES and PTFE
The 1-coat type containing as a main component has few fine pinholes on the surface of the coating film, so it is excellent as a coating film for pots that mainly cook tempura. By the way, when the content of PTFE in the 1-coat type is 40 wt% or less of the resin component, the pinholes existing on the surface of the coating film are filled with PES, so that the pinholes can be further reduced.

However, if it is less than 10 wt%, the releasability is extremely deteriorated and it is not suitable for practical use. On the other hand, the firing temperature is generally 380 ° C. or higher, but in the above-mentioned one-coat type, the pinholes are increased due to the bleeding phenomenon of PTFE on the coating surface, and the heat-resistant oil resistance is lowered. Therefore, in order to suppress the bleeding of PTFE and to secure the mold releasability that causes no problem in actual use, the firing temperature is set to 3
The optimum temperature is 20 ° C to 350 ° C.

As is clear from the above description, by using the fluorine coating of the present invention, it is possible to eliminate pinholes on the surface of the coating and smooth the surface of the coating.
It can be used without any particular problem even when used in a tempura pan where it is constantly exposed to oil at high temperatures. Further, aluminum powder, carbon, and iron oxide are used as the pigment of the coating film, and the content of the pigment is generally 20 wt% or more of the resin component in order to secure the concealing property. In such a coating film, releasability is still large and slippery.

However, the pigment content is 50 wt% of the resin component.
When it is at least%, the resin component can be reduced to roughen the surface of the coating film, and the slipperiness of the resin coating film can be suppressed. If the pigment content exceeds 120 wt%, the resin component in the film becomes too small and the properties of the film such as abrasion resistance and releasability are remarkably deteriorated. Therefore, the content is preferably 120 wt% or less.

Further, when aluminum oxide or silicon carbide having high hardness is used as the pigment component in the coating, the effect of suppressing slipperiness can be enhanced. By using such a film with reduced slipperiness in the portion where the cooker is installed, slippage between the pot and the cooker is suppressed, and safe and convenient cooking is possible. Further, it does not affect the heating efficiency.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. (Embodiment 1) As shown in FIG. 1, the cooker body is an electromagnetic cooker 22 whose heating system is an electromagnetic induction heating system, and the electromagnetic cooker body 22 is provided with an operation panel 24. A ceramic top plate 2 is provided on the upper part of the container body 22.
3 is provided, and the pan 21 described in Embodiment 2 and capable of generating heat by the electromagnetic induction heating method is installed on the top plate 23. Since the top plate is a ceramic top plate that is extremely hard and heat resistant, the pan easily slides or moves during cooking, but in the present embodiment, the pan does not affect the heating efficiency. It is possible to suppress slipping and moving.

Next, the pan of the cooking device, which is the main point of the present invention, will be described in detail. As shown in FIG. 2, PTFE, PES and pigment are the main components on the surface of the pot 1 of aluminum die casting base material,
First coatings 2 having various compositions of sample numbers 1 to 25 in which the content of PTFE and the firing temperature were changed as shown in (Table 1) were formed.

[0018]

[Table 1]

The specific manufacturing method of the first coating was as follows. First, the solvent is N-methyl-2-
Pyrrolidinone, toluene, and methyl ethyl ketone are used, aluminum powder and carbon, and iron oxide are used as the pigment in an amount of 30 wt% of the resin component, and any paint having a PTFE content in the ratio shown in (Table 1) is roughened by sandblasting. The first coating film was formed by coating the modified aluminum die-casting base material pan 1 with an air spray gun and firing at each temperature shown in (Table 1).

The heat-resistant oil resistance and releasability of each of the thus prepared pots were evaluated in the following manner. For the heat-resistant oil resistance, salad oil was put in a pan and kept at 200 ° C. to examine the change of the coating film at this time. Further, the mold releasability was similarly evaluated by putting the salad oil in a pan and frying the potato fries a certain number of times at 200 ° C., and then determining the degree of oil adhesion of the coating film.

The results are shown in (Table 1). In addition,
In the heat-resistant oil resistance column of (Table 1), ○ indicates that there is no change in the coating, Δ indicates that slight discoloration or swelling of the coating is observed, and × indicates significant change such as discoloration or swelling of the coating. Are seen respectively. Further, in the column of releasability, ◯ indicates almost no oil adhesion, Δ indicates a little oil adhesion, and x indicates severe dirt adhesion.

As is clear from (Table 1), when the content of PTFE is in the range of 10 to 40 wt% of the resin component and the firing temperature is in the range of 320 to 350 ° C, heat resistance and releasability are improved. It showed excellent properties. As is clear from (Table 1), the content of PTFE is 10 to 40 wt% of the resin component.
%, And the firing temperature is in the range of 320 to 350 ° C. Sample Nos. 7, 8, 9, 12, 13, 14, 17, 1.
Nos. 8 and 19 showed excellent heat resistance and releasability.

(Embodiment 2) As in Embodiment 1, as shown in FIG. 3, PTFE, PES and a pigment are contained as main components in the inner surface 11a and the outer surface 11b of the pot 11 made of an aluminum die casting base material. 30 wt% of resin component
%, The pigment content is 30 wt%, and the first coating film 12 is formed by firing at a temperature of 340 ° C. On the other hand, the installation portion 11c of the pan 11 with the cooker body has various compositions of sample numbers 26 to 37 in which the pigment content and pigment component of the first coating 12 are changed as shown in (Table 2). Two coatings 13 were each formed. The firing temperature was 340 ° C. in all cases.

[0024]

[Table 2]

The potability and abrasion resistance of each of the pots thus prepared were evaluated by the following methods. That is, the restraint was evaluated by placing a pot on the main body of the cooker, attaching a spring balance to a part of the side surface of the pot and pulling it horizontally, and measuring the force of movement at this time. Regarding the wear resistance, a nylon scrubbing brush was used to rub a certain number of times to evaluate the degree of wear.

The results are shown in (Table 2). In addition,
In the restraint column of (Table 2), ◯ indicates 150 g or more and x indicates less than 150 g. In the column of abrasion resistance, the mark “◯” indicates that the degree of wear is small, and the mark “x” indicates that the degree of wear is large.

As is clear from (Table 2), the sample numbers 27, 28, 29, 30, 32, 33 and 34, in which the pigment content is in the range of 50 to 120 wt% of the resin component, are inhibitory and abrasion resistant. It exhibited excellent properties. Sample number 3 using aluminum oxide or silicon carbide as the pigment
Nos. 2, 33 and 34 showed excellent stopping properties.

In the present invention, the cooker body is not limited to the electromagnetic cooker, and may be a resistance heating cooker or the like. In the case of the resistance heating cooker, the pan described in the second embodiment is used. I wish I had it.

[0029]

As is apparent from the above, PTFE, PE
Use a pot with S and a pigment as the main components, with the proportion of PTFE being 10 to 40 wt% of the resin component, and forming a coating that is baked at a temperature of 320 to 350 ° C in a pot with excellent heat and oil resistance. We can provide the cooker that was used.

Further, the pigment content in the coating is 50 to 120 wt% of the resin component in at least the installation portion of the cooker body.
%, And by forming a film using either aluminum oxide or silicon carbide as a pigment in the pigment on the pan, the pan does not slide during cooking without affecting the heating efficiency. It is possible to provide a difficult and safe cooker that is easy to use.

Further, the thermal efficiency of the cooking device does not decrease, but rather, the addition of the pigment increases the thermal conductivity and enables uniform heating.

[Brief description of the drawings]

FIG. 1 is an overall perspective view of a cooking device according to the present invention.

FIG. 2 is a sectional view of a pan according to the first embodiment of the cooker of the present invention.

FIG. 3 is a sectional view of a pan according to the second embodiment of the cooker of the present invention.

[Explanation of symbols]

 1, 11, 21 Pan 2, 12 First coating 11a Inner surface of the pot 11b Outer surface of the pot 11c Installation portion of the pan with the cooker body 13 Second coating 22 Electromagnetic cooker 23 Ceramic top plate 24 Operation panel

Claims (3)

[Claims] 1. A polytetrafluoroethylene resin, a polyether sulfone resin, and a pigment as main components on the surface of a metal substrate, and the ratio of the polytetrafluoroethylene resin is 10 to 40 wt% of the resin component, and 320 to 350 ° C. Cooker that uses a pan with a coating that is baked at the temperature of. 2. The cooking device according to claim 1, wherein a pot having a coating film in which the pigment content in the coating film is 50 to 120 wt% of the resin component is used in at least the installation portion of the cooking device body. 3. The cooker according to claim 2, wherein a pan having a coating formed by using at least one of aluminum oxide and silicon carbide as a pigment in the coating is used.