JP3166775B2 - Food such as new range hood - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to an ethylene tetrafluoride / ethylene copolymer (ETFE) film (hereinafter sometimes abbreviated as ETFE film) on a metal surface of a substrate layer. The present invention relates to a hood such as a range hood which is laminated.

(Prior art)

2. Description of the Related Art Conventionally, in a cooking place such as a home, a hotel, a restaurant, etc., a hood is provided on a source of the above-mentioned source in order to discharge heat, oil mist, water vapor, smoke, odor, etc. generated during cooking to the outside. I have. The materials used for these current hoods are mainly painted steel plates for home use and steel plates such as stainless steel and tinplate for business use. By the way
Because of its nature, it is very dirty and difficult to clean, because, as mentioned above, its surface, which collects and discharges oil mist, water vapor and smoke, has water vapor and smoke adhering to it. Soot and the like are adsorbed and further oxidized by heat from below, discoloring to brown or black and becoming dirty, and at the same time, increasing the viscosity or hardening, resulting in further hygienic problems. On the other hand, the hood is located at the top of the range and does not have much support, so it is difficult not only to easily indulge but also to rub strongly.

On the other hand, kitchens in the home and the food and beverage industry have become remarkably colorful in recent years, and various designs are required. Most of the conventional materials have a single color of metal color or painting, and there has never been a material having good washability, heat resistance and high design.

[Problems to be solved by the invention]

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems of the prior art, and a novel cleaning hood, durable and rich in design which has never been known before. And the materials used for it.

[Means for solving the problem]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problem, and a metal plate in which at least a part of an inner wall layer and / or an outer wall layer of a hood such as a range hood is laminated with an ETFE film is formed. The present invention provides a hood such as a range hood and a material used therefor. Hereinafter, the configuration of the present invention will be described in more detail.

The term "fluororesin" as used in the present invention is not particularly limited as long as it is a thermoplastic resin containing a fluorine atom in the molecular structural formula of the resin. Ethylene tetrafluoride resin having four fluorine atoms in it, ethylene trifluoride resin, ethylene difluoride resin, ethylene monofluoride resin and copolymers of these resins, and further mixtures Among them, ethylene tetrafluoride-based resin and ethylene difluoride-based resin are preferable, and ethylene tetrafluoride-based resin is more preferable.
Here, the tetrafluoroethylene-based resin specifically includes, for example, ethylene tetrafluoride-based resin (PTFE), ethylene tetrafluoride / perfluoroalkoxyethylene copolymer (PFA),
There are ethylene tetrafluoride / propylene hexafluoride / perfluoroalkoxyethylene copolymer (EPE) and ethylene tetrafluoride copolymer (ETFE), among which PFA and ETFE are preferable, and ETFE is particularly preferable. The above-mentioned ethylene trifluoride-based resin is specifically, for example, ethylene trifluoride chloride resin (PCTFE) and ethylene trifluoride ethylene-ethylene copolymer (ECTFE). preferable. Specific examples of the ethylene difluoride-based resin and the ethylene monofluoride-based resin include vinylidene fluoride resin (PVDF) and vinyl fluoride resin (PVC).

It is needless to say that the ETFE film used for the outer layer in the present invention does not have any damage such as pinholes. Either can be used, but in general,
It is 10-200μ, preferably 20-100μ.

The method for producing these fluorine-containing resin-based films can be obtained by a conventionally performed method, for example, can be appropriately formed by a hot melt extrusion method, a casting method, and the like.If necessary, a pigment, a dye, Inorganic fillers such as glass powder, glass beads and glass fibers, aluminum oxide, talc, mica, silica and the like can be blended. Also, a desired pattern can be printed.

Further, the “metal plate” in the present invention is not particularly limited, and any metal plate can be used. In general, for example, iron-based, aluminum-based, copper-based, titanium-based, and nickel-based And the like, among which iron-based, aluminum-based and copper-based metal plates are preferable, and the iron-based metal plate is any metal plate as long as it is a metal plate mainly containing iron in composition. However, specifically, for example, there are cold-rolled steel sheets, galvanized steel sheets, zinc alloy-plated steel sheets, aluminum-plated steel sheets, copper-plated steel sheets, stainless steel sheets, phosphoric acid-treated steel sheets, aluminum-zinc alloy-plated steel sheets, and the like. , Galvanized steel sheet, zinc alloy plated steel sheet,
Aluminum-plated lead steel sheets, aluminum-zinc alloy-plated steel sheets and stainless steel sheets are preferred.

As the aluminum-based metal plate, any metal plate may be used as long as it is a metal plate mainly containing aluminum metal in composition.
An aluminum plate described on September 30, 1957, Light Metal Association of Japan, "Light Aluminum Handbook (Second Edition)", pp. 13-22, specifically, pure aluminum, (Al-Cu)
System, (Al-Mn) system, (Al-Si) system, (Al-Mg) system, (Al
-Mg-Si) and (Al-Zn-Mg) plates.

The thickness of the metal plate in the present invention is not particularly limited, but is generally, for example, 0.10 to 2 m / m, preferably 0.2 to 1 m / m.

Next, a description will be given of a heat-sealing laminating method, which is a preferred method of bonding a fluorine-containing resin film to a metal plate.

Heat fusion bonding of the film can be performed by a conventional method, but in general, for example, a pretreatment step, a heating step, a film lamination, a pressing step,
It can be obtained by steps such as a reheating step and a cooling step. Hereinafter, the above steps will be described.

(1) Pre-treatment step This step is a step performed as necessary to more strongly cover the metal plate and the fluororesin-based film.

The purpose of the pretreatment process of the metal plate is to remove oily substances, foreign matters, oxide films, etc. attached to the surface by washing, and to expose the base metal to the surface by polishing or the like. Surface treatment such as surface plating and acid treatment is performed, and if necessary, roughness is applied to the surface.

a. Surface cleaning There is no particular limitation, and a cleaning method conventionally performed with a specific metal is used. For example, as a degreasing method, degreasing and cleaning are performed using an organic solvent, an alkaline aqueous solution, a surfactant, or the like.

b.Surface polishing Surface polishing, for example, by mechanical and chemical polishing, etc.
The bullion can be exposed on the surface.

c.Surface treatment If necessary, plating the surface that covers the film,
A chemical conversion treatment such as a coating treatment for providing a metal oxide film layer and a rust prevention treatment can be performed. For example, specific examples of the chemical conversion treatment of an iron-based metal include, for example, a phosphate treatment with zinc phosphate, calcium phosphate, and the like, and a chromate treatment with a reactive chromate, a coating chromate, and the like.

d. Surface Roughening The surface can be roughened by a surface roughening method by physical means such as brushing, sand blasting and shot blasting, or a surface roughening method by a chemical electrochemical etching method and a combination thereof.

Pretreatment step of the film To remove oily substances and foreign substances adhering to the film surface, and to provide an oxide film or the like by corona discharge treatment, chemical treatment, etc., further, various surface treatment agents, For example, a treatment such as applying aminosilane, vinylsilane, mercaptosilane, or the like can be performed.

(2) Heating Step This is a step of heating the pretreated metal plate in the air or in an atmosphere substantially free of oxygen, and, if necessary, simultaneously heating the film.

Heating Atmosphere The “atmosphere substantially free of oxygen” referred to above is particularly limited as long as it is an atmosphere that can be heated while substantially maintaining the surface states of the metal plate and the film subjected to the pretreatment step. Although not specifically described, specifically, the atmosphere has an oxygen content of 1% or less. In order to obtain the heating atmosphere, heating can be performed by filling with an inert gas or in a vacuum state. The type of inert gas is
Any gas may be used, but generally, nitrogen gas, argon gas, neon gas, helium gas, etc., among which nitrogen gas and argon gas are preferable, and nitrogen gas is particularly preferable.

 The vacuum state is 5 Torr or less.

Heating temperature The heating temperature is appropriately determined as appropriate depending on the type of the fluorine-containing resin film and the metal plate to be coated. Generally, the softening point temperature (mp) of the fluorine-containing resin film is determined.
The temperature is preferably at least (mp + 30) ° C., more preferably at least (mp + 50) ° C., and not more than the thermal decomposition temperature. Specifically, in the case of a fluorine-containing resin film, ethylene tetrafluoride perfluoro Alkoxyethylene copolymers generally have a temperature of 280 ° C. to 400 ° C., ethylene-tetrafluoroethylene copolymers generally have a temperature of 260 to 370 ° C., and ethylene-chlorotrifluoroethylene copolymers have a general 220-350 ° C, and 250 for polyvinylidene fluoride
~ 300 ° C.

Heating time Heating time is not particularly specified, at least the surface of the metal plate, it is necessary to be a time until reaching the heating temperature, is appropriately determined by the type and thickness of the metal plate, Generally 1-20 minutes.

(3) Lamination Step This step is a step of laminating and pressing a fluorine-containing resin-based film on a heated metal plate.

Lamination Atmosphere The lamination atmosphere preferably conforms to the previous step (2).

Press This is a step of continuously pressing a film laminated and placed on a heated metal plate with, for example, two rolls or the like to strongly coat the film. Here, the roll in contact with the film is
Rolls that do not adhere to films such as rubber rolls or metal rolls are preferable, and the pressure is 5 to 30 kg / cm ² , preferably
10-20 kg / cm ² .

(4) Reheating Step This step is a reheating step performed as necessary in order to further increase the fusion force between the metal plate and the film of the film-coated metal plate obtained in the previous step.

Heating atmosphere The heating atmosphere is not particularly limited, and is preferably an atmosphere according to the previous step (2).

Heating temperature The heating temperature is appropriately determined as appropriate depending on the type of the fluororesin film and the metal plate to be coated. In general, the heating temperature is generally equal to or higher than the softening point temperature (mp) of the fluororesin film, preferably ( (mp + 20) ° C. or higher, more preferably (mp + 30) ° C. or higher, and preferably not higher than the thermal decomposition temperature. Specifically, in the case of a fluorine-containing resin film, ethylene tetrafluoride / perfluoroalkoxyethylene copolymer In general, 280-400 ° C, generally 260-360 ° C for ethylene-tetrafluoroethylene copolymer, and 220-350 ° C for ethylene-chlorotrifluoroethylene copolymer. 200-250 for vinylidene chloride
And the like.

Heating time Heating time is not particularly specified, it is necessary to at least the time until the film is sufficiently adapted to the metal plate, it is appropriately determined by the type and thickness of the metal plate, but is generally determined 1 to 20 minutes.

(5) Cooling Step This step is a step of cooling the reheated film-coated metal plate to room temperature, and can be cooled by, for example, an air-cooling fan, water, or the like. Here, uneven cooling causes distortion or deformation of the plate, and therefore it is desirable to cool the plate uniformly.

The film-coated metal plate of the present invention obtained by the above-described process heats the metal plate and the ETFE film to fuse and bond them together, so that the metal plate and the ETFE film exhibit a strong fusion force and a long time. It will be usable.

The step of range hooding the bonded body of the metal and the ETFE film obtained by the above steps is performed by a conventionally performed step, for example, a cutting step, a range hood forming step, and, if necessary, a bonding step. Etc.

As a method of forming the ETFE film laminated metal sheet, cutting into the required rolled shape by a method such as shearing (sharing) or cutting (milling, sawing) (cutting process)
Then, after forming into a container shape by a method such as bending and drawing (range hood forming process), welding (arc welding, plasma welding, electron beam welding), brazing, The joining process (joining step) can be performed by a method such as soldering or riveting.

The range hood of the present invention thus obtained has a continuous uniform layer of an ETFE film having no pinhole at all, and therefore, oxidizes not only oil mist, water vapor and soot adhering thereto but also soot. The cured film can be wiped off very easily, and at the same time the cleaning work itself is reduced. In addition to its functional durability, it is highly resistant to heat and has no fading, so it is beautiful forever. Furthermore, it is possible to design and color by printing, and the design becomes extremely rich.

As the printing layer, it is preferable to provide a printing layer described in Japanese Patent Application Nos. 1-73899 and 1-139155. For example, as a printing layer of Japanese Patent Application No. 1-73899, a fluororesin layer which is heat-sealed on a metal surface and a thixotropic index (TI value) of 2 to 8 is formed on the uppermost layer. Is a printing layer formed by printing using an ink consisting of, as a printing layer of Japanese Patent Application No. 1-73899, a fluororesin film having a printing layer on a metal surface, A preferred embodiment is a print layer formed by heat fusion.

"Foods such as range hoods" used in the present invention.
Are hoods for discharging dirty gas and the like generated from the kitchen, and hoods for a suction unit for discharging air from factories and meeting places. It is preferable that the ETFE film is entirely covered with a portion that comes into contact with a dirty gas or the like, but it may be that the ETFE film partially covers a particularly dirty portion. For example, there are cases where both sides (inner wall layer and outer wall layer) of the hood base material layer are covered,
In some cases, only the inner wall layer is coated, and in other cases, only the outer wall layer is coated.

Hereinafter, the present invention will be described in more detail with reference to Examples, but it is needless to say that the present invention should not be limited to Examples.

Example 1 One side of a transparent film of 40 μm ethylene tetrafluoride / ethylene copolymer was subjected to corona discharge treatment to activate the surface to a wettability index of 42 dynes, and was made of Tetron having a mesh size of 270 mesh using the ink described below. Printing was performed on the transparent film using a screen. The printed matter was heated and dried in a hot air circulating drier at 120 ° C. for 10 minutes to obtain a print film in which a 10 μm thick print layer composed of the ink thin film was adhered to the fluororesin layer.

On the other hand, one side of a 1100 series rolled aluminum plate shown in JIS H-4000 having a thickness of 1.0 mm is sand-blasted with an average depth of unevenness of 10 to 15 microns (surface roughness), and then the above-mentioned sand blasted surface is electrolytically etched. I do. This electrolytic etching treatment was performed using a 3% aqueous solution of NaCl, at a temperature of 40 ° C., at an electrolytic density of 4 amps / dm ^{2, and} at a current of 35 cyclones / cm ² .

After the etched surface was washed with water and dried, the aluminum plate was preheated to 310 ° C., the transparent film-printed surface was overlaid on the etched surface, and pressed with a pressure of 20 kg / cm ² , followed by 31
A heat treatment is performed at 5 ° C. for 10 minutes for heat fusion to form a fluororesin layer on the aluminum plate, and the resin-coated metal plate of the present invention in which the printed layer is laminated on the back surface of the fluororesin layer is obtained. Was. A range hood was prepared using the obtained metal plate.

(Ink Production Method) A copolymer of tetrafluoroethylene, cyclohexylvinyl ether, ethylvinyl ether and hydroxybutylvinyl ether was obtained by a conventional method. In this copolymer, the molar ratio of each component was 50: 18: 22: 10 (by the magnetic resonance method), and the intrinsic viscosity of the copolymer at 30 ° C. in tetrahydrofuran was 0.4 dl /. g. 100 g of this copolymer was dissolved in 80 g of carbitol acetate and 20 g of toluene, 50 g of titanium oxide and 6 g of colloidal silica were added, and the mixture was sufficiently mixed by a three-roll mill to obtain an ink composition. This composition had a viscosity of 270 ps. And a TI value of 5.

Example 2 First, as an aluminum substrate, an A3004P-H34 (0.6 mm thick) aluminum plate specified in JIS H4000 was used.
Electroetching was performed in a 4% aqueous sodium chloride solution at a current density of 3.3 A / dm ² to form a rough surface having a Ra of 3.5 μm.
The surface was printed with the ink described in Example 1.

This aluminum plate was heated to a temperature of 350 ° C., and a 50 μm-thick ethylene tetrafluoroethylene copolymer film (melt flow index) was formed on the printed surface.
30 m ³ / sec) to obtain a fluororesin laminated aluminum plate.

The heat fusion is performed by applying a pressure of 15 kg / cm to the heated metal plate and the film using a silicon roll having a diameter of 10 cm.
The conditions were followed.

A range hood was manufactured using the resin laminated aluminum plate formed as described above.

Example 3 A commercially available phosphate-treated electrogalvanized steel sheet (Nippon Steel Corporation: Bond steel sheet EGC, thickness 0.8 m / m) was used as an alkaline degreasing agent (using Fine Cleaner 301, manufactured by Nippon Barka Rising). After washing the surface under the condition of 60 ° C. for 3 minutes, water washing and drying were performed. The steel sheet was placed in a heating furnace with a nitrogen substitution of 0.1% oxygen and heat-treated at 350 ° C. for 6 minutes, and then a pair of silicon rolls placed in a nitrogen atmosphere having the same oxygen concentration were used. 7Kg /
Thermal fusion was performed at a pressure of cm ² . Further, the heat-fused steel sheet was reheated in a nitrogen atmosphere at 325 ° C. for 7 minutes, and left standing indoors to be cooled to obtain a fluororesin film-coated steel sheet. A range hood was prepared using the obtained film-coated steel sheet.

As described above, the performance of each of Examples 1 to 7 was evaluated, and the results are shown in Table 1 below.

(Evaluation Method) 1. Detergency 3 g of tempura oil was spread on the fluororesin surface of the range hood obtained in the example over an area of 30 × 30 cm, and then wiped off with a cloth. The evaluation criteria were as follows.

充分 A の み 〃 〃 な か っ 2. 2. 2. 2. 2. 2. 2. 2. 2. 場合 2. 2. 2. 場合 場合 場合 場合 2. 場合 場合 2. 2. 2. 2. 2. 2. 2. 2. 2.
Using a WS-type sunshine carbon (manufactured by Suga Test Instruments Co., Ltd.) shown in 977, an accelerated exposure test for 5000 hours was performed, and the appearance was compared with that of the preserved test piece. The case where there was almost no change from the appearance of the storage test piece was evaluated as O, and the case where it changed was evaluated as X.

3. Heat resistance Torchor is attached to the fluororesin surface of range hood made in each case.
After 3 seconds exposure to the flame of the knife, the color change was observed.な い indicates no change before and after exposure, and x indicates change.

4. Processability Using a part of the resin laminate obtained in each example, cut 100 squares by a 1 mm width cross-cut method, and use an Erichsen tester (ESM No.1 made by Tokyo Testing Machine Works) to cut the diameter. 20m
Draw 7mm using a steel ball of m. The test piece after this drawing is subjected to a cellophane peel test to determine the number of peeled pieces.
A sample without peeling was evaluated as ○.

5. Appearance A print pattern or a scribed pattern that is clearly visible is marked with a circle.

From Table 1 above, it is clear that the range hood made from the fluororesin-coated metal plate according to the present invention has extremely excellent performance and excellent design.

[Brief description of the drawings]

1 to 4 are partial cross-sectional views showing an example of the present invention in a reduced scale. DESCRIPTION OF SYMBOLS 1 ... Base material (metal plate) 2 ... Printing layer 3 ... Fluorine resin film

────────────────────────────────────────────────── ─── Continuing from the front page Judge of the Joint Panel Judge Kazuto Tomioka Judge, Wakako Okada Judge, Kiyohisa Otsuki (56) References JP-A-64-61244 (JP, A) JP-A-51-130487 (JP, A) JP-A-1-141030 (JP, A) JP-A-1-1411029 (JP, A) JP-A-1-214425 (JP, A) JP-A-61-181229 (JP, U) JP-A-62-76850 (JP, U) Actually open 57-58818 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) F24F 7/06 B32B 27/30

Claims (2)

(57) [Claims] 1. An inner wall layer of a hood such as a range hood or the like.
And forming a metal plate having a printing surface in contact with the metal plate and a heat-bonded metal plate by forming an ethylene tetrafluoroethylene / ethylene copolymer (ETFE) film having at least a portion of the outer wall layer having a printing layer. Hoods such as range hoods
De. 2. An inner wall layer of a hood such as a range hood or the like.
And at least a part of the outer wall layer is formed by processing a metal plate laminated by heat fusion by contacting a tetrafluoroethylene / ethylene copolymer (ETFE) film with a printing surface of a metal plate having a printing layer. Hoods such as range hoods
De.