JPH10137132A - Cooker and manufacture thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve foul preventing performance and endurance of a window glass by a method wherein a film having a fluoroalkyl group and a siloxane bond is formed on a top surface of a float glass and arranged with the surface thereof on the cooking side. SOLUTION: The surface of a base material made of a float glass is irradiated with light having a wavelength distribution of below 300nm to select the base material surface as bottom surface on which surface emission attributed to a tin surface and top surface on which its surface emission is observed. Then, a 10<-2> mol/L solvent using fluoroalkyltrichlorosilane as fluoroalkylsilane compound and octadecafluorooctane as non-water based solvent is applied on the base material of the top surface at a thickness of 10-20μm and a condensation reaction is cased between the fluoroalkyltrichlorosilane and a surface hydroxide group of the top surface to form a chemical bond. Thereafter, under a drying, a film having a fluoroalkyl group and a siloxane bond is formed on a silicate surface of the top surface. Then, the top surface is mounted on the cooking side.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cooker of a type such as an oven toaster, a microwave oven, a microwave oven, a fish roaster and the like, which can be observed through a glass, such as an oven toaster, a microwave oven, a fish roaster, etc. .

[0002]

2. Description of the Related Art Conventionally, a glass having a film having a fluoroalkyl group and a siloxane bond formed thereon is used as a window glass without selecting a surface of a float glass substrate, and the film surface is set on the cooking side. A cooker was considered.

[0003]

However, in general, a float glass has a flat surface formed by passing the glass in a molten state on a molten tin bath. Surface containing a lot of tin on the silicate surface due to contact with the surface (hereinafter referred to as tin surface)
There is a bottom surface and a top surface of a surface which is not in contact with the molten tin bath on the opposite surface and which contains little tin on the silicate surface (hereinafter referred to as a silicate surface).

[0004] When a film having a fluoroalkyl group and a siloxane bond is formed on the bottom surface of such a float glass, the film has poor adhesion, as compared with the case where the film is formed on the top surface. Heat and abrasion resistance were poor.
Therefore, the glass surface on which the film having the fluoroalkyl group and the siloxane bond is formed is used as the window glass without selecting the surface (top surface and bottom surface) of the float glass base material so that the film surface becomes the cooking side. In the case of the cooker installed in this place, the durability of this film varied greatly.

[0005]

SUMMARY OF THE INVENTION The present invention has been made to solve these problems, and a glass having a film having a fluoroalkyl group and a siloxane bond formed on a top surface of a float glass is used as a window glass. Is a cooking appliance characterized by being installed so that it is on the cooking side, and the glass surface having a film having a fluoroalkyl group and a siloxane bond formed on the top surface of the float glass is used as a window glass, and the film surface is cooked. In the case of the cooking device installed on the side, the durability of this film can be improved as compared with the case where the film is formed on the bottom surface. Further, a great variation in durability can be suppressed as compared with the case where this film is formed without selecting the surface (top surface and bottom surface) of the float glass substrate.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention according to claim 1 is characterized in that a glass having a film having a fluoroalkyl group and a siloxane bond formed on a top surface of a float glass is provided so that the film surface is on the cooking side. It is a cooker with features.

Further, the invention according to claim 2 is a step of selecting a top surface of the float glass, and applying a solution containing a fluoroalkylsilane-based compound thereon and drying the solution, thereby forming a fluoroalkyl group and a siloxane bond. And a step of installing the film in a cooker such that the film surface is on the cooking side.

Thus, the durability of this film can be improved as compared with the case where the film is formed on the bottom surface.

Further, compared with the case where this film is formed without selecting the surface (top surface and bottom surface) of the float glass substrate, a great variation in durability can be suppressed.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As a concrete example of a cooker having an antifouling window glass and a method for manufacturing the same according to the present invention, first, a method for manufacturing an antifouling window glass will be described with reference to FIG.

A soda glass-based float glass is used as a float glass substrate, and the surface of the substrate is irradiated with light from a glass inspection lamp having a wavelength distribution of 300 nm or less, whereby the surface of the substrate is caused by a tin surface. A bottom surface where light emission is observed and a top surface (silicate surface) where surface light emission is not observed are selected (A in FIG. 2).

Next, on two kinds of base materials having the coated surface as the top surface and the bottom surface, a fluoroalkylsilane compound of the chemical formula C ₈ F ₁₇ C ₂ H ₄ SiCl _{3 is} formed under an anhydrous atmosphere at about room temperature.
Wherein octadecafluorooctane was used as the non-aqueous solvent.
When applying the 0 ^{over 2} mol / L solution at a thickness of 10 to 20 [mu] m, surface hydroxyl groups of the fluoroalkyl trichlorosilane and the top surface or bottom surface undergoes a condensation reaction, a fluoroalkyl trichlorosilane top surface or bottom surface and chemically bonded (FIG. 2B).

Thereafter, when dried in an atmosphere containing water, the fluoroalkyltrichlorosilanes undergo a condensation reaction, and a film having a fluoroalkyl group and a siloxane bond is formed on the silicate surface on the top surface and on the tin surface on the bottom surface. (C in FIG. 2).

Further, a compound having a siloxane bond and a fluoroalkyl group which is not chemically bonded to each surface is removed by evaporation, and a monomolecular film having a fluoroalkyl and a siloxane bond which have formed a chemical bond with each surface is formed on the top surface. It remains on the silicate surface and on the tin surface at the bottom surface (D in FIG. 2). In this way, two types of antifouling window glass can be manufactured.

Further, as an embodiment of a cooker having the antifouling window glass of the present invention, the above-described two types of antifouling window glass attached to an oven toaster so that the film surface is on the cooking side is shown in FIG. 1 will be described based on the sectional view shown in FIG.

Reference numeral 1 denotes an antifouling window glass having a film having a siloxane bond containing a fluoroalkyl group chemically bonded to the surface on the top surface 2 of the float glass on the cooking side.
Reference numeral 3 denotes a door to which the antifouling window glass 1 is fixed. The door 3 is attached to a main body 5 by a hinge 4 and can be opened and closed. The food 6 is cooked for a predetermined time by a heater 8 which is heated by electricity sent from a power supply coat 7.

Then, in order to evaluate the performance of the antifouling window glass, a toast
Times → frozen pizza once → fry reheating once → frozen gratin 1
The cooking cycle was repeated with one cycle as one cycle. During this time, a load of 2 kgf was applied to the cooking surface side every cycle, and the surface was rubbed 100 times with a dishwashing sponge soaked in water.
The change in the contact angle of water on the surface of the film having a fluoroalkyl group and a siloxane bond when 0 μl was dropped was measured. The results are shown in FIGS. 3 and 4, respectively.

A comparison of these results shows that the durability of the film having a fluoroalkyl group and a siloxane bond formed on the silicate surface on the top surface is superior to that formed on the tin surface on the bottom surface. Understandably, the goals of the present invention can be achieved.

As the fluoroalkylsilane compound used in the present invention, those represented by the following general formula (Chemical Formula 1) such as heptadecafluorodexyltrichlorosilane and heptadecafluorodexyltrimethoxysilane can be used. Available.

[0020]

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The non-aqueous solvent may be any organic solvent that does not have active hydrogen that reacts with the above fluoroalkylsilane compound. For example, a carbonic acid such as n-hexadecane may be used for the above fluoroalkylsilane compound. Those represented by the general formula (Chemical Formula 2) such as hydrogenated solvents and halogenated hydrocarbon solvents such as octadecafluorooctane, and those represented by the general formula (Chemical Formula 3) such as linear alkylsiloxane solvents such as hexamethyldisiloxane And a compound of the general formula (Chemical Formula 4) such as a cyclic alkylsiloxane solvent such as octamethylsiloxane, or a mixture of these arbitrarily is preferable, and the performance shown above is obtained.

[0022]

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[0023]

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[0024]

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The coating method may be any method as long as it can be applied to one side, such as a spray, a roll coater,
A method using a spin coater is effective.

Although the example of the oven toaster has been described here, the same effect can be obtained for various cookers using a float glass for a window glass, such as a microwave oven, a microwave oven, and a fish roaster. it can.

[0027]

As is apparent from the above embodiments, according to the above-mentioned invention, a glass having a film having a fluoroalkyl group and a siloxane bond formed on the top surface of a float glass is used as a window glass, By installing the film on the cooking side, the durability of the film can be improved as compared with the case where the film is formed on the bottom surface.

Further, compared with the case where this film is formed without selecting the surface (top surface and bottom surface) of the float glass substrate, a great variation in durability can be suppressed. Therefore, the present invention has an effect of providing a cooking device made of antifouling glass having excellent durability, and has a great industrial value.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a cooking device showing one embodiment of the present invention.

FIG. 2 is a view showing a manufacturing process of an antifouling window glass in the cooking device of the present invention.

FIG. 3 is a diagram showing a change in an area where dirt can be wiped off when a cooking cycle is repeated using the cooking device of the present invention.

FIG. 4 is a diagram showing a change in a contact angle of a wiping surface when a cooking cycle is repeated using the cooking device of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Antifouling window glass 2 Top surface of float glass (surface having a film having a fluoroalkyl group and a siloxane bond) 3 Door 5 Main body 6 Cooking

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Atsushi Asa, inventor, 1006 Kadoma, Kadoma, Osaka Prefecture, Matsushita Electric Industrial Co., Ltd. 72) Inventor Mamoru Isoya 1006 Kadoma, Kadoma, Osaka Prefecture Matsushita Electric Industrial Co., Ltd.

Claims (2)

[Claims] 1. A cooker characterized in that a glass having a film having a fluoroalkyl group and a siloxane bond formed on a top surface of a float glass is provided such that the film surface is on the cooking side. 2. A step of selecting a top surface of the float glass, and a step of forming a film having a fluoroalkyl group and a siloxane bond by applying a solution containing a fluoroalkylsilane-based compound thereon and drying the solution. And a step of installing the cooking device on the cooking device such that the film surface is on the cooking side.