JPH0615000B2 - Electric iron - Google Patents

Description

TECHNICAL FIELD The present invention relates to an electric iron used for press finishing of clothes and the like.

[Prior Art] An electric iron is one in which the bottom surface of a base provided with a heater, that is, a hanging surface, press-finishes clothes and the like. In general, the base is made of aluminum or an aluminum alloy, and the hanging surface on the lower surface thereof is provided with a surface treatment film of tetrafluoroethylene resin for the purpose of obtaining corrosion resistance and non-adhesiveness of the hanging surface.

The tetrafluoroethylene resin has poor adhesion to aluminum and aluminum alloys. Therefore, when applying the above surface-treated coating, first coat a primer for improving the adhesion on the hanging surface of the base, and then apply this coating coating. The surface is coated with a tetrafluoroethylene resin and heated and baked to form a surface-treated film.

[Problems to be solved by the invention]

However, as shown by the curve B in FIG. 3, the surface-treated coating made of ethylene tetrafluoride resin has a relatively low surface hardness of about H (pencil hardness, the same applies below) at room temperature, and the temperature rises. Along with this, the hardness gradually decreases, and at 200 ° C., the hardness decreases to about 5B, which causes a problem that the friction with the clothing or the like causes the wear to occur relatively early.
Also, when applying a surface treatment film to the hanging surface of the base, first coat a primer to improve the adhesion to the hanging surface, and then coat the coating film of this primer with a tetrafluoroethylene resin. Therefore, there is a problem that the work process becomes complicated, the manufacturing efficiency is lowered, and the manufacturing cost is increased. The present invention aims to solve each of these problems.

[Means for solving problems]

In order to solve such a problem, the present invention is such that the surface treatment film provided on the hanging surface of the base is made of a mixture of a tetrafluoroethylene resin and a polyether sulfone resin.

[Action]

The polyether sulfone resin contained in the tetrafluoroethylene resin improves the hardness of the surface-treated coating and the adhesion to the base.

〔Example〕

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

FIG. 2 shows the electric iron as a whole, in which reference numeral 1 is a base made of, for example, aluminum, and a handle 3 made of, for example, synthetic resin is attached to the upper surface side of the base 1 via a heat shield cover 2. A temperature control knob 4 for setting the temperature of the base 1 is provided at the front end of the upper end of the handle 3. Further, a water tank 5 is formed in the front part of the handle 3, a pouring / draining port 6 is formed on the front surface of the water tank 5, water is stored in the water tank 5 through the pouring / draining port 6, and this water is The steam is appropriately dropped into an evaporation chamber (not shown) of the base 1 to form steam, and the steam is spouted from spout holes (not shown) formed in the hanging surface 1a on the lower surface of the base 1. Reference numeral 6a is an opening / closing lid attached to the water inlet / outlet port 6 of the water tank 5.

As shown in FIG. 1, a heater 7 is embedded in the base 1, and the base 1 is maintained at a predetermined temperature set by the temperature adjusting knob 4 based on the heat generated by the heater 7. A surface treatment film 8 is uniformly applied to the hanging surface 1a on the lower surface of the base 1.

The surface-treated coating 8 is a mixture of a tetrafluoroethylene resin and a polyether sulfone resin, and the mixing ratio is, for example, 50:50. The step of applying the surface-treated coating 8 to the hanging surface 1a of the base 1 will be described. A tetrafluoroethylene resin and a polyether sulfone resin are used.
It is obtained by mixing at a ratio of 0:50, adding a solvent to this mixture to make it liquid, coating this on the hanging surface 1a of the base 1 by, for example, a spraying means, and further heating and firing at about 400 ° C.

In the surface treatment coating 8 made of such a mixture of the tetrafluoroethylene resin and the polyether sulfone resin,
As shown by the curve A in FIG. 3, the hardness at room temperature is as high as about 2H as compared with the conventional surface-treated coating of a tetrafluoroethylene resin alone (curve B), and the hardness decreases as the temperature rises. Almost no near 200 ℃, that is 200
The surface treatment film 8 maintains a substantially constant high hardness (about H) up to near 0 ° C. Therefore, the surface treatment film 8 is prevented from being worn over a long period of time, and the corrosion resistance and non-adhesiveness of the hanging surface 1a are kept good.

Further, since the surface-treated coating 8 of the present invention contains the polyethersulfone resin in the tetrafluoroethylene resin, the adhesion to the base material of the base 1 is good, so that the conventional primer is not necessary and the base 1 It can be directly applied to the hanging surface 1a, which simplifies the working process, improves the manufacturing efficiency, and reduces the manufacturing cost. Furthermore, the surface-treated coating 8 of the present invention containing the polyether sulfone resin has an advantage that it has good coloring properties and can be colored in pastel colors or the like.

Although the base material is aluminum in the above embodiments, the base material is not limited to aluminum and may be aluminum alloy, zinc alloy, stainless steel, ceramic, or the like.

〔The invention's effect〕

As described above, according to the present invention, the hardness of the surface-treated coating can be maintained at a high value with almost no decrease with an increase in temperature, thus preventing wear of the surface-treated coating over a long period of time. The effect that the corrosion resistance and the non-adhesiveness of the hanging surface of the base can be well maintained and that the surface-treated coating can be efficiently and inexpensively provided on the hanging surface of the base.

[Brief description of drawings]

FIG. 1 is a sectional view of an essential part showing an embodiment of the present invention, and FIG.
Similarly, FIG. 3 is a perspective view of the whole, and FIG. 3 is a characteristic curve diagram showing characteristics of the surface-treated coating according to the present invention and the conventional surface-treated coating in comparison. 1 ... Base, 1a ... Hanging surface, 8 ... Surface treatment coating.

Front page continued (72) Inventor Shinichi Nakanishi 2570, Gosuda 1, Kamo City, Niigata Prefecture, Toshiba Heat Fixtures Co., Ltd. (72) Inventor, Hitoshi Watanabe 2570, 1 Gosuda, Kamo City, Niigata Prefecture (72) Inventor Takashi Ishiwata 2570 1 Gosuda, Kamo City, Niigata Prefecture 1 within Toshiba Heat Appliances Co., Ltd. (72) Inventor Ichiharu Tsubaki 2570 1 Gosuda, Kamo City, Niigata Prefecture Within Toshiba Heat Appliances Co., Ltd. (56) References JP-A-60-150799 (JP, A) JP-A-60-41100 (JP, A) JP-A-52-93797 (JP, A) JP-A-53-125943 (JP, A)

Claims (3)

[Claims] 1. An electric iron characterized in that a surface treatment coating of a mixture of a tetrafluoroethylene resin and a polyether sulfone resin is applied to a hanging surface of a base. 2. The electric iron according to claim 1, wherein the mixing ratio of the tetrafluoroethylene resin and the polyether sulfone resin is 50:50. 3. An electric iron as claimed in claim 1, wherein the base is aluminum or an aluminum alloy.