WO2020122069A1 - Top plate for cooking device - Google Patents

Top plate for cooking device Download PDF

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Publication number
WO2020122069A1
WO2020122069A1 PCT/JP2019/048293 JP2019048293W WO2020122069A1 WO 2020122069 A1 WO2020122069 A1 WO 2020122069A1 JP 2019048293 W JP2019048293 W JP 2019048293W WO 2020122069 A1 WO2020122069 A1 WO 2020122069A1
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WO
WIPO (PCT)
Prior art keywords
heat
top plate
resistant resin
resin layer
inorganic
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PCT/JP2019/048293
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French (fr)
Japanese (ja)
Inventor
司 松原
武史 土谷
弘孫 小西
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日本電気硝子株式会社
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Application filed by 日本電気硝子株式会社 filed Critical 日本電気硝子株式会社
Publication of WO2020122069A1 publication Critical patent/WO2020122069A1/en

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    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C17/00—Surface treatment of glass, not in the form of fibres or filaments, by coating
    • C03C17/28—Surface treatment of glass, not in the form of fibres or filaments, by coating with organic material
    • C03C17/32—Surface treatment of glass, not in the form of fibres or filaments, by coating with organic material with synthetic or natural resins
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C15/00—Details
    • F24C15/10—Tops, e.g. hot plates; Rings
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/02—Induction heating
    • H05B6/10—Induction heating apparatus, other than furnaces, for specific applications
    • H05B6/12—Cooking devices

Definitions

  • the present invention is an invention relating to a top plate for a cooker.
  • a glass plate made of crystallized glass or the like having a low coefficient of thermal expansion is used for the cooker top plate.
  • a colorless glass plate is used as the glass plate, generally, in order to conceal the internal structure of the cooking device, a decorative layer is provided as a decorative layer on the back surface located on the side opposite to the cooking surface on which the cooking utensil is placed.
  • a porous inorganic pigment layer made of an inorganic pigment and glass powder, and a heat resistant resin layer made of a silicone resin or the like are provided.
  • the thermal expansion coefficient of the glass powder used for the inorganic pigment layer is higher than the thermal expansion coefficient of the glass plate, so tensile stress occurs on the surface on which the inorganic pigment layer is formed. Therefore, the strength of the cooker top plate is reduced.
  • Patent Document 2 suppresses scratches by providing a heat resistant sliding layer made of graphite or the like.
  • an object of the present invention is to provide a top plate for a cooker in which the back surface is not easily scratched.
  • the top plate for a cooker according to the present invention which was devised to solve the above problems, has a cooking surface with which cooking utensil contacts, a glass plate having a back surface facing the cooking surface, and a back surface of the glass plate.
  • the flaky inorganic filler contains an alumina filler.
  • the flake-like inorganic filler has an average particle size of 5 to 40 ⁇ m.
  • the heat resistant resin contains a silicone resin.
  • the heat-resistant resin layer contains the flaky inorganic filler in an amount of 5 to 40% by weight.
  • the pencil hardness of the heat resistant resin layer is preferably 2H or more.
  • FIG. 1 is a schematic front cross-sectional view showing a cooker top plate according to an embodiment of the present invention.
  • a cooker top plate 1 (hereinafter, “cooker top plate 1” is simply referred to as “top plate 1”) includes a glass substrate 2.
  • the glass substrate 2 has a cooking surface 2a which is a main surface on one side and a back surface 2b which is a main surface on the other side.
  • the cooking surface 2a is a surface on which cooking utensils such as a pan and a frying pan are placed.
  • the back surface 2b is a surface facing the heating device on the inner side of the cooking device. Therefore, the cooking surface 2a and the back surface 2b have a front-back relationship.
  • the glass substrate 2 transmits at least a part of light having a wavelength of 450 nm to 700 nm.
  • the glass substrate 2 may be colored and transparent, but is preferably colorless and transparent from the viewpoint of further enhancing the aesthetic appearance of the top plate 1.
  • being colorless and transparent means having a light transmittance of 70% or more in the visible wavelength region at a wavelength of 450 nm to 700 nm.
  • the glass substrate 2 preferably has high heat resistance and a low coefficient of thermal expansion.
  • the softening temperature of the glass substrate 2 is preferably 700° C. or higher, and more preferably 750° C. or higher.
  • the average linear thermal expansion coefficient of the glass substrate 2 at 30° C. to 750° C. is preferably in the range of ⁇ 10 ⁇ 10 ⁇ 7 /° C. to +60 ⁇ 10 ⁇ 7 /° C., and ⁇ 10 ⁇ 10 ⁇ 7. /° C. to +50 ⁇ 10 ⁇ 7 /° C. is more preferable, and ⁇ 10 ⁇ 10 ⁇ 7 /° C. to +40 ⁇ 10 ⁇ 7 /° C. is even more preferable.
  • the glass substrate 2 is preferably made of glass having a high glass transition temperature and low expansion, or low expansion crystallized glass.
  • Specific examples of the low expansion crystallized glass include "N-0" manufactured by Nippon Electric Glass Co., Ltd. Note that borosilicate glass or the like may be used as the glass substrate 2.
  • a heat resistant resin layer 3 is provided on the back surface 2b of the glass substrate 2.
  • the heat resistant resin layer 3 is provided directly on the back surface 2b of the glass substrate 2. Further, in this embodiment, the surface of the heat resistant resin layer 3 is exposed to the outside air. Therefore, only the heat-resistant resin layer 3 is laminated on the back surface 2b of the glass substrate 2, and the other layers are not laminated. However, other layers may be laminated on the heat-resistant resin layer 3, but from the viewpoint of further improving the productivity and the viewpoint of reducing the film stress, the heat-resistant resin layer 3 as in the present embodiment. It is preferred that only one is laminated.
  • the heat-resistant resin layer 3 also contains a heat-resistant resin, an inorganic filler, an inorganic coloring pigment, and an extender pigment.
  • the inorganic filler is a flaky inorganic filler having a Mohs hardness of 3 or more.
  • the heat-resistant resin layer 3 containing at least the heat-resistant resin and the flake-shaped inorganic filler is directly provided on the back surface 2b of the glass substrate 2. Therefore, for example, when assembling the cooker, the back surface is unlikely to be scratched.
  • the reason why the scratches are hard to occur is that the flaky inorganic filler having a Mohs hardness of 3 or more hardens the surface of the heat resistant resin layer 3.
  • the extender pigment has been used to suppress scratches, but the flake-like inorganic filler is easily dispersed so as to cover the surface of the heat-resistant resin layer 3 and is extremely hard, so that the back surface is less likely to be scratched. Conceivable.
  • the flake-shaped inorganic filler includes a plate-like shape, a scale-like shape, or the like, and is a shape obtained by crushing a spherical or lump-like three-dimensional shape in one direction.
  • the average particle diameter of the flaky inorganic filler is preferably 5 to 40 ⁇ m from the viewpoint of dispersibility in the heat resistant resin layer 3.
  • the average particle diameter is the median diameter derived from the volume distribution measured by the laser diffraction scattering method.
  • the average particle size of the flaky inorganic filler is more preferably 10 ⁇ m or more, further preferably 20 ⁇ m or more. Further, the average particle diameter of the flake-like inorganic filler is more preferably 35 ⁇ m or less, further preferably 30 ⁇ m or less.
  • the particle size of the flake-like inorganic filler in the direction perpendicular to the thickness direction is preferably in the range of 5 to 50 ⁇ m from the viewpoint of dispersibility in the heat resistant resin layer 3.
  • the particle size in the direction perpendicular to the thickness direction is the surface equivalent surface area of 20 flake-like inorganic fillers in the photograph taken by a scanning electron microscope, and the circle-equivalent diameter of this surface area. Is a value calculated by obtaining
  • the Mohs hardness of the flaky inorganic filler is 3 or more.
  • the Mohs hardness is a Mohs hardness divided into 10 stages from 1 to 10.
  • the Mohs hardness of the flaky inorganic filler is preferably 5 or more, more preferably 8 or more.
  • the Mohs hardness is preferably 9 or less.
  • Examples of the flake-like inorganic filler having a Mohs hardness of 3 or more include alumina, magnesia, glass, orthoclase, quartz, diamond and the like.
  • the Mohs hardness of the flaky inorganic filler is a measurement value of the Mohs hardness of a plate-like body (50 mm long ⁇ 50 mm wide ⁇ 1 mm thick) having the same components as the inorganic filler.
  • the extender pigment contained in the heat-resistant resin layer 3 is an inorganic pigment powder different from the above flaky inorganic filler having a Mohs hardness of 5 or more.
  • the extender pigment is not particularly limited, but for example, talc, mica and the like can be used. These extender pigments may be used alone or in combination of two or more.
  • the extender pigment has a lower effect of suppressing scratches as compared with the flake-like inorganic filler, but can further enhance the heat resistance and impact resistance of the top plate 1.
  • the average particle size of the extender pigment is preferably 5 to 50 ⁇ m from the viewpoint of dispersibility in the heat resistant resin layer 3.
  • the average particle diameter is the median diameter derived from the volume distribution measured by the laser diffraction scattering method.
  • the average particle size of the extender pigment is more preferably 10 ⁇ m or more, further preferably 15 ⁇ m or more. Further, the average particle size of the extender pigment is more preferably 45 ⁇ m or less, further preferably 40 ⁇ m or less.
  • the heat resistant resin layer 3 preferably contains an inorganic coloring pigment for coloring the top plate 1.
  • the inorganic coloring pigment contained in the heat resistant resin layer 3 is not particularly limited as long as it is a colored inorganic substance.
  • the inorganic coloring pigment include white pigment powder such as TiO 2 powder, ZrO 2 powder or ZrSiO 4 powder, blue inorganic pigment powder containing Co, green inorganic pigment powder containing Co, and Ti—Sb—Cr system.
  • a Ti—Ni-based yellow inorganic pigment powder, a Co—Si-based red inorganic pigment powder, a brown inorganic pigment powder containing Fe, or a black inorganic pigment powder containing Cu can be used.
  • the blue inorganic pigment powder containing Co include Co—Al based or Co—Al—Ti based inorganic pigment powders.
  • Specific examples of the Co—Al-based inorganic pigment powder include CoAl 2 O 4 powder and the like.
  • Specific examples of the Co—Al—Ti-based inorganic pigment powder include CoAl 2 O 4 —TiO 2 —Li 2 O powder.
  • green inorganic pigment powder containing Co examples include Co—Al—Cr-based or Co—Ni—Ti—Zn-based inorganic pigment powders.
  • Specific examples of the Co—Al—Cr-based inorganic pigment powder include Co(Al,Cr) 2 O 4 powder and the like.
  • Specific examples of the Co—Ni—Ti—Zn-based inorganic pigment powder include (Co, Ni, Zn) 2 TiO 4 powder.
  • brown inorganic pigment powder containing Fe examples include Fe—Zn based inorganic pigment powder.
  • Fe—Zn-based inorganic pigment powder examples include (Zn,Fe)Fe 2 O 4 powder.
  • the black inorganic pigment powder containing Cu include Cu—Cr-based inorganic pigment powder and Cu—Fe-based inorganic pigment powder.
  • Specific examples of the Cu—Cr-based inorganic pigment powder include Cu(Cr,Mn) 2 O 4 powder and Cu—Cr—Mn powder.
  • specific examples of the Cu—Fe-based inorganic pigment powder include Cu—Fe—Mn powder.
  • the flaky inorganic filler and the inorganic coloring pigment may be separately dispersed in the heat-resistant resin layer 3, but in view of designability, a part of the inorganic coloring pigment is a surface of the flaky inorganic filler. May be attached to.
  • the inorganic coloring pigment can be attached to the surface of the flake-like inorganic filler by the high-speed air current impact method. By using such a flake-like inorganic filler, the top plate 1 having gloss like a jewel can be obtained.
  • the average particle diameter of the inorganic color pigment is preferably 0.1 to 20 ⁇ m from the viewpoint of dispersibility in the heat resistant resin layer 3.
  • the average particle diameter is the median diameter derived from the volume distribution measured by the laser diffraction scattering method.
  • the average particle diameter of the inorganic color pigment is more preferably 0.5 ⁇ m or more, still more preferably 1 ⁇ m or more. Further, the average particle diameter of the inorganic color pigment is more preferably 15 ⁇ m or less, further preferably 10 ⁇ m or less.
  • the shape of the inorganic color pigment is not particularly limited, but a spherical shape is preferable from the viewpoint of impact resistance and dispersibility.
  • the ratio of the average particle diameters of the flake-like inorganic filler and the inorganic coloring pigment is 1 to 100, and the flake-like inorganic filler and the inorganic coloring pigment are uniform. It is preferable from the viewpoint of dispersion into The (flake-like inorganic filler/inorganic color pigment) is more preferably 1.5 or more, further preferably 2 or more. Further, (flake-like inorganic filler/inorganic color pigment) is more preferably 70 or less, further preferably 30 or less.
  • the content of the flake-like inorganic filler in the heat-resistant resin layer 3 is preferably in the range of 5 to 40% by mass from the viewpoint of suppressing scratches and designing.
  • the content of the flaky inorganic filler is more preferably 10% by mass or more, further preferably 15% by mass or more.
  • the content of the flake-like inorganic filler is more preferably 35% by mass or less, further preferably 25% by mass or less.
  • the content of the extender pigment in the heat-resistant resin layer 3 is preferably in the range of 5 to 40% by mass from the viewpoint of dispersibility.
  • the content of the extender pigment is more preferably 10% by mass or more, further preferably 15% by mass or more. Further, the content of the extender pigment is more preferably 35% by mass or less, and further preferably 30% by mass or less.
  • the content of the inorganic coloring pigment in the heat resistant resin layer 3 is preferably in the range of 10 to 55 mass% from the viewpoint of designability.
  • the content of the inorganic coloring pigment is more preferably 15% by mass or more, further preferably 20% by mass or more.
  • the content of the inorganic coloring pigment is more preferably 40% by mass or less, further preferably 30% by mass or less.
  • the heat-resistant resin contained in the heat-resistant resin layer 3 preferably has high heat resistance.
  • heat-resistant resin include silicone resin.
  • the silicone resin contained in the heat-resistant resin layer 3 is preferably, for example, a silicone resin in which a functional group directly bonded to a silicon atom is at least one of a methyl group and a phenyl group. In this case, discoloration of the heat-resistant resin layer 3 when the top plate 1 becomes hot can be suppressed more effectively.
  • the content of the silicone resin in the heat resistant resin layer 3 is preferably in the range of 20 to 50 mass% from the viewpoint of heat resistance and impact resistance.
  • the content of the silicone resin is more preferably 25% by mass or more, further preferably 30% by mass or more. Further, the content of the silicone resin is more preferably 45% by mass or less, further preferably 40% by mass or less.
  • the thickness of the heat resistant resin layer 3 can be appropriately set according to the light transmittance of the heat resistant resin layer 3 and the like.
  • the heat-resistant resin layer 3 can have a thickness of, for example, 5 to 20 ⁇ m.
  • the thickness of the heat resistant resin layer 3 is more preferably in the range of 10 to 15 ⁇ m.
  • the heat-resistant resin layer 3 preferably has a pencil hardness of 2H or more.
  • the pencil hardness is the hardness measured according to the pencil hardness test of JIS K5600-5-4 (1999). If the pencil hardness is 2H or more, the top plate 1 that is unlikely to have scratches on the back surface can be obtained.
  • the top plate 1 can be manufactured by the following method, for example. First, a paste containing a heat-resistant resin, flaky inorganic filler powder, inorganic coloring pigment powder, and extender pigment powder is prepared. Next, the prepared paste is directly applied on the back surface 2b of the glass substrate 2 and dried. Thereby, the top plate 1 having the heat resistant resin layer 3 can be manufactured. Depending on the composition of the heat resistant resin layer 3, the top plate 1 may be obtained by baking after drying.
  • the paste application speed and viscosity can be appropriately set according to the contents of the flake-like inorganic filler powder, the inorganic color pigment powder, and the extender pigment powder contained in the heat resistant resin layer 3.
  • the content of the flake-like inorganic filler powder, the inorganic coloring pigment powder and the extender pigment powder in the heat resistant resin layer 3 is large, it is preferable to lower the viscosity of the paste and slow the coating speed of the silicone resin.
  • Examples of the method for reducing the viscosity of the paste include changing the type of heat-resistant resin and adding a solvent to the paste.
  • the drying temperature of the applied paste can be, for example, about 50°C to 100°C.
  • the drying time can be, for example, about 5 minutes to 1 hour.
  • the paste containing the heat-resistant resin, the flaky inorganic filler powder, the coloring pigment powder, and the extender pigment powder is directly applied onto the back surface 2b of the glass substrate 2 and dried. Since the top plate 1 is manufactured by doing so, there is no step of baking the glass frit on the back surface 2b of the glass substrate 2. Therefore, tensile stress is unlikely to occur on the back side of the glass substrate 2, and the top plate 1 is less likely to be damaged when a load or impact is applied to the cooking surface 2a of the glass substrate 2. Further, since it is not necessary to burn the glass frit in a raw state, the designability is unlikely to deteriorate. Therefore, the top plate 1 obtained by the manufacturing method of the present embodiment can have improved heat resistance and impact resistance without impairing the design.
  • the film composition ratio after firing is 54% by mass of silicone resin (resin solid content), 15% by mass of Cu—Fe—Mn-based black pigment (average particle size: 1 ⁇ m), and extant pigment of talc (average particle size). : 20 ⁇ m) and 15 mass% of flakes of alumina filler powder (Mohs hardness: 9, average particle diameter: 25 ⁇ m) were mixed so as to be 16 mass %. Next, 17.8 mass% of an organic solvent was added to 100 mass% of these mixtures to prepare a paste. Next, this paste was applied to a transparent crystallized glass plate (Nippon Electric Glass Co., Ltd., trade name “N-0”, average linear thermal expansion coefficient at 30° C.
  • Example 2 The film composition ratio after firing is 53% by mass of silicone resin (resin solid content), 11% by mass of Cu—Fe—Mn-based black pigment (average particle size: 1 ⁇ m), and extender pigment of talc (average particle size: 20 ⁇ m). ) 11% by mass and flake-shaped alumina filler powder (Mohs hardness: 9, average particle size: 25 ⁇ m) were mixed in an amount of 25% by mass, except that the mixture was mixed in the same manner as in Example 1 to prepare a top plate for cookers (top plate). ) was produced.
  • Example 3 The film composition ratio after firing is 67% by mass of silicone resin (resin solid content), 12% by mass of Cu—Fe—Mn-based black pigment (average particle size: 1 ⁇ m), and extender pigment of talc (average particle size: 20 ⁇ m). ) 12% by mass and flaky alumina filler powder (Mohs hardness: 9, average particle size: 25 ⁇ m) were mixed so as to be 9% by mass, and the same procedure as in Example 1 was repeated. ) was produced.
  • the film composition ratio after firing is 54% by mass of silicone resin (resin solid content), 15% by mass of Cu—Fe—Mn-based black pigment (average particle size: 1 ⁇ m), and extant pigment of talc (average particle size). : 20 ⁇ m) 31% by mass were mixed.
  • 17.8 mass% of an organic solvent was added to 100 mass% of these mixtures to prepare a paste.
  • this paste was applied to a transparent crystallized glass plate (Nippon Electric Glass Co., Ltd., trade name “N-0”, average linear thermal expansion coefficient at 30° C. to 750° C.: 0.5 ⁇ 10 ⁇ 7 /° C., thickness 4 mm. ) Was screen-printed so that the thickness was 10 ⁇ m.
  • the film composition ratio after firing is 54% by mass of silicone resin (resin solid content), 15% by mass of Cu—Fe—Mn-based black pigment (average particle size: 1 ⁇ m), and extant pigment of talc (average particle size). : 20 ⁇ m) and flake-shaped mica filler powder (Mohs hardness: 2.8, average particle size: 25 ⁇ m) 16% by mass.
  • 17.8 mass% of an organic solvent was added to 100 mass% of these mixtures to prepare a paste.
  • this paste was applied to a transparent crystallized glass plate (Nippon Electric Glass Co., Ltd., trade name “N-0”, average linear thermal expansion coefficient at 30° C.

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Abstract

The present invention addresses the problem of providing a top plate 1 for a cooking device, the top plate 1 having a rear surface 2b that resists scratching.　The top plate 1 for a cooking device according to the present invention, which was created to solve this problem, has: a glass plate 2 having a cooking surface 2a contacted by cookware, and a rear surface 2b facing the cooking surface 2a; and a heat-resistant resin layer 3 provided in contact with the rear surface of the glass plate 2, wherein the heat-resistant resin layer 3 includes a heat-resistant resin having heat resistance and a flake-form inorganic filler having a Moh's hardness of 3 or higher.

Description

調理器用トッププレートTop plate for cooker
　本発明は、調理器用トッププレートに関する発明である。 The present invention is an invention relating to a top plate for a cooker.
　調理器用トッププレートには、低い熱膨張係数を有する結晶化ガラスなどからなるガラス板が用いられている。ガラス板として無色のガラス板を用いる場合には、一般に、調理器内部の構造を隠蔽するため、調理器具が載せられる調理面とは反対側に位置する裏面には、装飾層として、特許文献１のように、無機顔料とガラス粉末からなる多孔質の無機顔料層、及びシリコーン系樹脂などからなる耐熱樹脂層が設けられている。 A glass plate made of crystallized glass or the like having a low coefficient of thermal expansion is used for the cooker top plate. When a colorless glass plate is used as the glass plate, generally, in order to conceal the internal structure of the cooking device, a decorative layer is provided as a decorative layer on the back surface located on the side opposite to the cooking surface on which the cooking utensil is placed. As described above, a porous inorganic pigment layer made of an inorganic pigment and glass powder, and a heat resistant resin layer made of a silicone resin or the like are provided.
　無機顔料層に使用するガラス粉末の熱膨張係数は、ガラス板の熱膨張係数に対して高いため、無機顔料層が形成された面には引っ張り応力が発生する。そのため、調理器用トッププレートの強度が低くなる。 The thermal expansion coefficient of the glass powder used for the inorganic pigment layer is higher than the thermal expansion coefficient of the glass plate, so tensile stress occurs on the surface on which the inorganic pigment layer is formed. Therefore, the strength of the cooker top plate is reduced.
　そこで、ガラス板の強度を低下させる無機顔料層を使用せず、耐熱樹脂層のみを設けることが考えられるが、耐熱樹脂層のみでは装飾層の耐傷性が低く、調理器の組み立て時の接触などによって調理器用トッププレートに傷が付く場合がある。 Therefore, it is conceivable to provide only the heat-resistant resin layer without using the inorganic pigment layer that reduces the strength of the glass plate, but with only the heat-resistant resin layer, the scratch resistance of the decorative layer is low, such as when contacting the cooker during assembly. This may damage the top plate for the cooker.
　これらの問題に対応するため、特許文献２では、黒鉛等からなる耐熱摺動層を設けることにより、傷を抑制している。 In order to address these problems, Patent Document 2 suppresses scratches by providing a heat resistant sliding layer made of graphite or the like.
特開２０１０－９９５８号公報JP, 2010-9958, A 特開２０１６－１１７６１号公報JP, 2016-11761, A
　耐熱摺動層を設けることにより傷が発生しにくくなるものの、強い引掻きによる傷を抑制するまでには至っていなかった。 Although scratches are less likely to occur by providing a heat-resistant sliding layer, it has not been able to suppress scratches due to strong scratching.
　以上の実情に鑑み、本発明の課題は、裏面に傷が付き難い調理器用トッププレートを提供することにある。 In view of the above circumstances, an object of the present invention is to provide a top plate for a cooker in which the back surface is not easily scratched.
　上記課題を解決するために創案された本発明に係る調理器用トッププレートは、調理器具が接する調理面と、前記調理面と対向する裏面とを有するガラス板と、前記ガラス板の裏面に接して設けられた耐熱樹脂層を有する調理器用トッププレートであって、前記耐熱樹脂層は、耐熱性を有する耐熱樹脂と、モース硬度３以上のフレーク状の無機フィラーとを含む。 The top plate for a cooker according to the present invention, which was devised to solve the above problems, has a cooking surface with which cooking utensil contacts, a glass plate having a back surface facing the cooking surface, and a back surface of the glass plate. A cooker top plate having a heat-resistant resin layer provided, wherein the heat-resistant resin layer includes a heat-resistant resin having heat resistance and a flaky inorganic filler having a Mohs hardness of 3 or more.
　上記の構成において、前記フレーク状の無機フィラーが、アルミナフィラーを含むことが好ましい。 In the above structure, it is preferable that the flaky inorganic filler contains an alumina filler.
　上記の構成において、前記フレーク状の無機フィラーの平均粒子径が５～４０μｍであることが好ましい。 In the above structure, it is preferable that the flake-like inorganic filler has an average particle size of 5 to 40 μm.
　上記の構成において、前記耐熱樹脂が、シリコーン樹脂を含むことが好ましい。 In the above structure, it is preferable that the heat resistant resin contains a silicone resin.
　上記の構成において、前記耐熱樹脂層が、前記フレーク状の無機フィラーを５～４０重量％含むことが好ましい。 In the above configuration, it is preferable that the heat-resistant resin layer contains the flaky inorganic filler in an amount of 5 to 40% by weight.
　上記の構成において、前記耐熱樹脂層の鉛筆硬度が２Ｈ以上であることが好ましい。 In the above structure, the pencil hardness of the heat resistant resin layer is preferably 2H or more.
　本発明によれば、裏面に傷が付き難い調理器用トッププレートを提供することが可能となる。 According to the present invention, it is possible to provide a top plate for a cooker in which the back surface is not easily scratched.
本発明の一実施形態に係る調理器用トッププレートを示す断面図である。It is sectional drawing which shows the top plate for cooking devices which concerns on one Embodiment of this invention.
　以下、本発明を実施するための形態について説明するが、本発明は以下の実施の形態に限定されるものではなく、本発明の趣旨を逸脱しない範囲で、当業者の通常の知識に基づいて、以下の実施の形態に対し適宜変更、改良等が加えられたものも本発明の範囲に入ることが理解されるべきである。 Hereinafter, embodiments for carrying out the present invention will be described, but the present invention is not limited to the following embodiments, and is within the scope not departing from the gist of the present invention, based on ordinary knowledge of those skilled in the art. It should be understood that those obtained by appropriately modifying or improving the following embodiments are also within the scope of the present invention.
　（調理器用トッププレート）
　図１は、本発明の一実施形態に係る調理器用トッププレートを示す模式的正面断面図である。図１に示すように、調理器用トッププレート１（以下、「調理器用トッププレート１」を、単に「トッププレート１」とする）は、ガラス基板２を備える。ガラス基板２は、一方側の主面である調理面２ａと、他方側の主面である裏面２ｂとを有する。調理面２ａは、鍋やフライパンなどの調理器具が載せられる側の面である。裏面２ｂは、調理器の内部側において加熱装置と対向する面である。従って、調理面２ａ及び裏面２ｂは、表裏の関係にある。 (Top plate for cooker)
FIG. 1 is a schematic front cross-sectional view showing a cooker top plate according to an embodiment of the present invention. As shown in FIG. 1, a cooker top plate 1 (hereinafter, “cooker top plate 1” is simply referred to as “top plate 1”) includes a glass substrate 2. The glass substrate 2 has a cooking surface 2a which is a main surface on one side and a back surface 2b which is a main surface on the other side. The cooking surface 2a is a surface on which cooking utensils such as a pan and a frying pan are placed. The back surface 2b is a surface facing the heating device on the inner side of the cooking device. Therefore, the cooking surface 2a and the back surface 2b have a front-back relationship.
　ガラス基板２は、波長４５０ｎｍ～７００ｎｍにおける少なくとも一部の光を透過する。ガラス基板２は、有色透明であってもよいが、トッププレート１の美観性をより一層高める観点から、無色透明であることが好ましい。なお、本明細書において、無色透明であるとは、波長４５０ｎｍ～７００ｎｍにおける可視波長域の光透過率が７０％以上であることをいう。 The glass substrate 2 transmits at least a part of light having a wavelength of 450 nm to 700 nm. The glass substrate 2 may be colored and transparent, but is preferably colorless and transparent from the viewpoint of further enhancing the aesthetic appearance of the top plate 1. In the present specification, being colorless and transparent means having a light transmittance of 70% or more in the visible wavelength region at a wavelength of 450 nm to 700 nm.
　トッププレート１では、加熱及び冷却が繰り返しなされる。そのため、ガラス基板２は、高い耐熱性及び低い熱膨張係数を有するものであることが好ましい。具体的には、ガラス基板２の軟化温度は、７００℃以上であることが好ましく、７５０℃以上であることがより好ましい。また、ガラス基板２の３０℃～７５０℃における平均線熱膨張係数は、－１０×１０－７／℃～＋６０×１０－７／℃の範囲内であることが好ましく、－１０×１０－７／℃～＋５０×１０－７／℃の範囲内であることがより好ましく、－１０×１０－７／℃～＋４０×１０－７／℃の範囲内であることがさらにより好ましい。従って、ガラス基板２は、ガラス転移温度が高く、低膨張なガラスや、低膨張の結晶化ガラスからなるものであることが好ましい。低膨張の結晶化ガラスの具体例としては、例えば、日本電気硝子社製の「Ｎ－０」が挙げられる。なお、ガラス基板２としては、ホウケイ酸ガラスなどを用いてもよい。 The top plate 1 is repeatedly heated and cooled. Therefore, the glass substrate 2 preferably has high heat resistance and a low coefficient of thermal expansion. Specifically, the softening temperature of the glass substrate 2 is preferably 700° C. or higher, and more preferably 750° C. or higher. The average linear thermal expansion coefficient of the glass substrate 2 at 30° C. to 750° C. is preferably in the range of −10×10 −7 /° C. to +60×10 −7 /° C., and −10×10 −7. /° C. to +50×10 −7 /° C. is more preferable, and −10×10 −7 /° C. to +40×10 −7 /° C. is even more preferable. Therefore, the glass substrate 2 is preferably made of glass having a high glass transition temperature and low expansion, or low expansion crystallized glass. Specific examples of the low expansion crystallized glass include "N-0" manufactured by Nippon Electric Glass Co., Ltd. Note that borosilicate glass or the like may be used as the glass substrate 2.
　ガラス基板２の裏面２ｂ上には、耐熱樹脂層３が設けられている。耐熱樹脂層３は、ガラス基板２の裏面２ｂ上に直接接して設けられている。また、本実施形態では、耐熱樹脂層３の表面が外気に曝されている。従って、ガラス基板２の裏面２ｂ上には、耐熱樹脂層３のみが積層されており、他の層が積層されていない。もっとも、耐熱樹脂層３上には他の層が積層されていてもよいが、生産性をより一層向上させる観点や、膜応力を小さくする観点からは、本実施形態のように耐熱樹脂層３のみが積層されていることが好ましい。 A heat resistant resin layer 3 is provided on the back surface 2b of the glass substrate 2. The heat resistant resin layer 3 is provided directly on the back surface 2b of the glass substrate 2. Further, in this embodiment, the surface of the heat resistant resin layer 3 is exposed to the outside air. Therefore, only the heat-resistant resin layer 3 is laminated on the back surface 2b of the glass substrate 2, and the other layers are not laminated. However, other layers may be laminated on the heat-resistant resin layer 3, but from the viewpoint of further improving the productivity and the viewpoint of reducing the film stress, the heat-resistant resin layer 3 as in the present embodiment. It is preferred that only one is laminated.
　また、耐熱樹脂層３は、耐熱樹脂と、無機フィラーと、無機着色顔料と、体質顔料とを含んでいる。そして、無機フィラーは、モース硬度３以上のフレーク状の無機フィラーである。 The heat-resistant resin layer 3 also contains a heat-resistant resin, an inorganic filler, an inorganic coloring pigment, and an extender pigment. The inorganic filler is a flaky inorganic filler having a Mohs hardness of 3 or more.
　このように、トッププレート１では、ガラス基板２の裏面２ｂ上に、耐熱樹脂と、フレーク状の無機フィラーとを少なくとも含む、耐熱樹脂層３が直接設けられている。そのため、例えば、調理器を組み立てる際において、裏面に傷が付き難い。このように、傷が付き難い理由としては、モース硬度３以上のフレーク状の無機フィラーは、耐熱樹脂層３の表面を硬くするためである。従来は、体質顔料により傷を抑制していたが、フレーク状の無機フィラーは、耐熱樹脂層３の表面を覆うように分散しやすく、かつ、非常に硬いために、裏面に傷が付き難くなると考えられる。 Thus, in the top plate 1, the heat-resistant resin layer 3 containing at least the heat-resistant resin and the flake-shaped inorganic filler is directly provided on the back surface 2b of the glass substrate 2. Therefore, for example, when assembling the cooker, the back surface is unlikely to be scratched. As described above, the reason why the scratches are hard to occur is that the flaky inorganic filler having a Mohs hardness of 3 or more hardens the surface of the heat resistant resin layer 3. Conventionally, the extender pigment has been used to suppress scratches, but the flake-like inorganic filler is easily dispersed so as to cover the surface of the heat-resistant resin layer 3 and is extremely hard, so that the back surface is less likely to be scratched. Conceivable.
　ここで、フレーク状の無機フィラーは、板状、鱗片状等の形状を包含するものであり、球状や塊状等の立体形状のものを一方向に押し潰した形状をいう。 Here, the flake-shaped inorganic filler includes a plate-like shape, a scale-like shape, or the like, and is a shape obtained by crushing a spherical or lump-like three-dimensional shape in one direction.
　フレーク状の無機フィラーの平均粒子径としては、５～４０μｍであることが、耐熱樹脂層３中における分散性の観点からみて好ましい。ここで、平均粒子径は、レーザー回折散乱法により測定される体積分布から導かれるメディアン径である。なお、フレーク状の無機フィラーの平均粒子径は、１０μｍ以上がより好ましく、２０μｍ以上が更に好ましい。また、フレーク状の無機フィラーの平均粒子径は、３５μｍ以下であることがより好ましく、３０μｍ以下であることが更に好ましい。 The average particle diameter of the flaky inorganic filler is preferably 5 to 40 μm from the viewpoint of dispersibility in the heat resistant resin layer 3. Here, the average particle diameter is the median diameter derived from the volume distribution measured by the laser diffraction scattering method. The average particle size of the flaky inorganic filler is more preferably 10 μm or more, further preferably 20 μm or more. Further, the average particle diameter of the flake-like inorganic filler is more preferably 35 μm or less, further preferably 30 μm or less.
　また、フレーク状の無機フィラーの厚み方向に垂直な方向における粒径は、５～５０μｍの範囲内であることが、耐熱樹脂層３中における分散性の観点からみて好ましい。ここで、厚み方向に垂直な方向における粒径は、走査型電子顕微鏡によって撮影された写真において、２０個のフレーク状の無機フィラーの、厚み方向における表面の表面積を求め、この表面積の円相当直径を求めることにより算出された値である。 The particle size of the flake-like inorganic filler in the direction perpendicular to the thickness direction is preferably in the range of 5 to 50 μm from the viewpoint of dispersibility in the heat resistant resin layer 3. Here, the particle size in the direction perpendicular to the thickness direction is the surface equivalent surface area of 20 flake-like inorganic fillers in the photograph taken by a scanning electron microscope, and the circle-equivalent diameter of this surface area. Is a value calculated by obtaining
　フレーク状の無機フィラーのモース硬度は３以上である。ここで、モース硬度は、１～１０までの１０段階に分けたモース硬度である。フレーク状の無機フィラーのモース硬度は、５以上であることが好ましく、８以上がより好ましい。なお、モース硬度が高すぎても傷付き抑制効果が上がらず、コストが高くなるため、モース硬度は９以下であることが好ましい。モース硬度３以上のフレーク状の無機フィラーとしては、例えば、アルミナ、マグネシア、ガラス、正長石、石英、ダイヤモンド等が挙げられる。
　なお、フレーク状の無機フィラーのモース硬度は、当該無機フィラーと同じ成分の板状体（縦５０ｍｍ×横５０ｍｍ×厚さ１ｍｍ）のモース硬度の測定値である。 The Mohs hardness of the flaky inorganic filler is 3 or more. Here, the Mohs hardness is a Mohs hardness divided into 10 stages from 1 to 10. The Mohs hardness of the flaky inorganic filler is preferably 5 or more, more preferably 8 or more. In addition, even if the Mohs hardness is too high, the effect of suppressing scratches does not increase and the cost increases, so the Mohs hardness is preferably 9 or less. Examples of the flake-like inorganic filler having a Mohs hardness of 3 or more include alumina, magnesia, glass, orthoclase, quartz, diamond and the like.
The Mohs hardness of the flaky inorganic filler is a measurement value of the Mohs hardness of a plate-like body (50 mm long × 50 mm wide × 1 mm thick) having the same components as the inorganic filler.
　耐熱樹脂層３に含まれる体質顔料は、上記のような、モース硬度５以上のフレーク状の無機フィラーとは異なる無機顔料粉末である。体質顔料としては、特に限定されないが、例えば、タルク、マイカなどを用いることができる。これらの体質顔料は、１種を単独で用いてもよく、複数種を併用してもよい。体質顔料は、傷付きを抑制する効果は、フレーク状の無機フィラーと比較して低いものの、トッププレート１の耐熱性や耐衝撃性をより一層高めることができる。 The extender pigment contained in the heat-resistant resin layer 3 is an inorganic pigment powder different from the above flaky inorganic filler having a Mohs hardness of 5 or more. The extender pigment is not particularly limited, but for example, talc, mica and the like can be used. These extender pigments may be used alone or in combination of two or more. The extender pigment has a lower effect of suppressing scratches as compared with the flake-like inorganic filler, but can further enhance the heat resistance and impact resistance of the top plate 1.
　体質顔料の平均粒子径としては、５～５０μｍであることが、耐熱樹脂層３中における分散性の観点からみて好ましい。ここで、平均粒子径は、レーザー回折散乱法により測定される体積分布から導かれるメディアン径である。なお、体質顔料の平均粒子径は、１０μｍ以上がより好ましく、１５μｍ以上が更に好ましい。また、体質顔料の平均粒子径は、４５μｍ以下であることがより好ましく、４０μｍ以下であることが更に好ましい。 The average particle size of the extender pigment is preferably 5 to 50 μm from the viewpoint of dispersibility in the heat resistant resin layer 3. Here, the average particle diameter is the median diameter derived from the volume distribution measured by the laser diffraction scattering method. The average particle size of the extender pigment is more preferably 10 μm or more, further preferably 15 μm or more. Further, the average particle size of the extender pigment is more preferably 45 μm or less, further preferably 40 μm or less.
　耐熱樹脂層３は、トッププレート１の着色のために無機着色顔料を含むことが好ましい。耐熱樹脂層３に含まれる無機着色顔料は、有色の無機物である限りにおいて特に限定されない。無機着色顔料としては、例えば、ＴｉＯ２粉末、ＺｒＯ２粉末若しくはＺｒＳｉＯ４粉末などの白色の顔料粉末、Ｃｏを含む青色の無機顔料粉末、Ｃｏを含む緑色の無機顔料粉末、Ｔｉ－Ｓｂ－Ｃｒ系若しくはＴｉ－Ｎｉ系の黄色の無機顔料粉末、Ｃｏ－Ｓｉ系の赤色の無機顔料粉末、Ｆｅを含む茶色の無機顔料粉末、又はＣｕを含む黒色の無機顔料粉末などが挙げられる。 The heat resistant resin layer 3 preferably contains an inorganic coloring pigment for coloring the top plate 1. The inorganic coloring pigment contained in the heat resistant resin layer 3 is not particularly limited as long as it is a colored inorganic substance. Examples of the inorganic coloring pigment include white pigment powder such as TiO 2 powder, ZrO 2 powder or ZrSiO 4 powder, blue inorganic pigment powder containing Co, green inorganic pigment powder containing Co, and Ti—Sb—Cr system. Alternatively, a Ti—Ni-based yellow inorganic pigment powder, a Co—Si-based red inorganic pigment powder, a brown inorganic pigment powder containing Fe, or a black inorganic pigment powder containing Cu can be used.
　Ｃｏを含む青色の無機顔料粉末の具体例としては、例えば、Ｃｏ－Ａｌ系又はＣｏ－Ａｌ－Ｔｉ系の無機顔料粉末が挙げられる。Ｃｏ－Ａｌ系の無機顔料粉末の具体例としては、ＣｏＡｌ２Ｏ４粉末などが挙げられる。Ｃｏ－Ａｌ－Ｔｉ系の無機顔料粉末の具体例としては、ＣｏＡｌ２Ｏ４－ＴｉＯ２－Ｌｉ２Ｏ粉末などが挙げられる。 Specific examples of the blue inorganic pigment powder containing Co include Co—Al based or Co—Al—Ti based inorganic pigment powders. Specific examples of the Co—Al-based inorganic pigment powder include CoAl 2 O 4 powder and the like. Specific examples of the Co—Al—Ti-based inorganic pigment powder include CoAl 2 O 4 —TiO 2 —Li 2 O powder.
　Ｃｏを含む緑色の無機顔料粉末の具体例としては、例えば、Ｃｏ－Ａｌ－Ｃｒ系又はＣｏ－Ｎｉ－Ｔｉ－Ｚｎ系の無機顔料粉末が挙げられる。Ｃｏ－Ａｌ－Ｃｒ系の無機顔料粉末の具体例としては、Ｃｏ（Ａｌ，Ｃｒ）２Ｏ４粉末などが挙げられる。Ｃｏ－Ｎｉ－Ｔｉ－Ｚｎ系の無機顔料粉末の具体例としては、（Ｃｏ，Ｎｉ，Ｚｎ）２ＴｉＯ４粉末などが挙げられる。 Specific examples of the green inorganic pigment powder containing Co include Co—Al—Cr-based or Co—Ni—Ti—Zn-based inorganic pigment powders. Specific examples of the Co—Al—Cr-based inorganic pigment powder include Co(Al,Cr) 2 O 4 powder and the like. Specific examples of the Co—Ni—Ti—Zn-based inorganic pigment powder include (Co, Ni, Zn) 2 TiO 4 powder.
　Ｆｅを含む茶色の無機顔料粉末の具体例としては、例えば、Ｆｅ－Ｚｎ系の無機顔料粉末が挙げられる。Ｆｅ－Ｚｎ系の無機顔料粉末の具体例としては、（Ｚｎ，Ｆｅ）Ｆｅ２Ｏ４粉末などが挙げられる。 Specific examples of the brown inorganic pigment powder containing Fe include Fe—Zn based inorganic pigment powder. Specific examples of the Fe—Zn-based inorganic pigment powder include (Zn,Fe)Fe 2 O 4 powder.
　Ｃｕを含む黒色の無機顔料粉末の具体例としては、例えば、Ｃｕ－Ｃｒ系の無機顔料粉末やＣｕ－Ｆｅ系の無機顔料粉末が挙げられる。Ｃｕ－Ｃｒ系の無機顔料粉末の具体例としては、Ｃｕ（Ｃｒ，Ｍｎ）２Ｏ４粉末や、Ｃｕ－Ｃｒ－Ｍｎ粉末などが挙げられる。また、Ｃｕ－Ｆｅ系の無機顔料粉末の具体例としては、Ｃｕ－Ｆｅ－Ｍｎ粉末などが挙げられる。
　これらの無機着色顔料は、１種を単独で用いてもよく、複数種を併用してもよい。 Specific examples of the black inorganic pigment powder containing Cu include Cu—Cr-based inorganic pigment powder and Cu—Fe-based inorganic pigment powder. Specific examples of the Cu—Cr-based inorganic pigment powder include Cu(Cr,Mn) 2 O 4 powder and Cu—Cr—Mn powder. Further, specific examples of the Cu—Fe-based inorganic pigment powder include Cu—Fe—Mn powder.
These inorganic color pigments may be used alone or in combination of two or more.
　なお、フレーク状の無機フィラーと無機着色顔料とは個別に耐熱樹脂層３中に分散していても良いが、意匠性を鑑みると、無機着色顔料の一部は、フレーク状の無機フィラーの表面に付着していてもよい。例えば、高速気流中衝撃法により、フレーク状の無機フィラーの表面に無機着色顔料を付着させることができる。このようなフレーク状の無機フィラーを用いることにより、宝石のような光沢を有するトッププレート１を得ることができる。 The flaky inorganic filler and the inorganic coloring pigment may be separately dispersed in the heat-resistant resin layer 3, but in view of designability, a part of the inorganic coloring pigment is a surface of the flaky inorganic filler. May be attached to. For example, the inorganic coloring pigment can be attached to the surface of the flake-like inorganic filler by the high-speed air current impact method. By using such a flake-like inorganic filler, the top plate 1 having gloss like a jewel can be obtained.
　無機着色顔料の平均粒子径としては、０．１～２０μｍであることが、耐熱樹脂層３中における分散性の観点からみて好ましい。ここで、平均粒子径は、レーザー回折散乱法により測定される体積分布から導かれるメディアン径である。なお、無機着色顔料の平均粒子径は、０．５μｍ以上がより好ましく、１μｍ以上が更に好ましい。また、無機着色顔料の平均粒子径は、１５μｍ以下であることがより好ましく、１０μｍ以下であることが更に好ましい。なお、無機着色顔料の形状については特に限定は無いが、球状であることが耐衝撃性および分散性の点からみて好ましい。 The average particle diameter of the inorganic color pigment is preferably 0.1 to 20 μm from the viewpoint of dispersibility in the heat resistant resin layer 3. Here, the average particle diameter is the median diameter derived from the volume distribution measured by the laser diffraction scattering method. The average particle diameter of the inorganic color pigment is more preferably 0.5 μm or more, still more preferably 1 μm or more. Further, the average particle diameter of the inorganic color pigment is more preferably 15 μm or less, further preferably 10 μm or less. The shape of the inorganic color pigment is not particularly limited, but a spherical shape is preferable from the viewpoint of impact resistance and dispersibility.
　また、フレーク状の無機フィラーと無機着色顔料の平均粒子径の比（フレーク状の無機フィラー／無機着色顔料）は、１～１００であることが、フレーク状の無機フィラーと無機着色顔料とが均一に分散する観点からみて好ましい。なお、（フレーク状の無機フィラー／無機着色顔料）は、１．５以上がより好ましく、２以上が更に好ましい。また、（フレーク状の無機フィラー／無機着色顔料）は、７０以下であることがより好ましく、３０以下であることが更に好ましい。 Further, the ratio of the average particle diameters of the flake-like inorganic filler and the inorganic coloring pigment (flake-like inorganic filler/inorganic coloring pigment) is 1 to 100, and the flake-like inorganic filler and the inorganic coloring pigment are uniform. It is preferable from the viewpoint of dispersion into The (flake-like inorganic filler/inorganic color pigment) is more preferably 1.5 or more, further preferably 2 or more. Further, (flake-like inorganic filler/inorganic color pigment) is more preferably 70 or less, further preferably 30 or less.
　耐熱樹脂層３中におけるフレーク状の無機フィラーの含有量は、５～４０質量％の範囲内であることが、傷付きを抑制する観点及び意匠性の観点からみて好ましい。なお、フレーク状の無機フィラーの含有量は、１０質量％以上がより好ましく、１５質量％以上が更に好ましい。また、フレーク状の無機フィラーの含有量は、３５質量％以下であることがより好ましく、２５質量％以下であることが更に好ましい。 The content of the flake-like inorganic filler in the heat-resistant resin layer 3 is preferably in the range of 5 to 40% by mass from the viewpoint of suppressing scratches and designing. The content of the flaky inorganic filler is more preferably 10% by mass or more, further preferably 15% by mass or more. The content of the flake-like inorganic filler is more preferably 35% by mass or less, further preferably 25% by mass or less.
　耐熱樹脂層３中における体質顔料の含有量は、５～４０質量％の範囲内であることが、分散性の観点からみて好ましい。なお、体質顔料の含有量は、１０質量％以上がより好ましく、１５質量％以上が更に好ましい。また、体質顔料の含有量は、３５質量％以下であることがより好ましく、３０質量％以下であることが更に好ましい。 The content of the extender pigment in the heat-resistant resin layer 3 is preferably in the range of 5 to 40% by mass from the viewpoint of dispersibility. The content of the extender pigment is more preferably 10% by mass or more, further preferably 15% by mass or more. Further, the content of the extender pigment is more preferably 35% by mass or less, and further preferably 30% by mass or less.
　また、耐熱樹脂層３中における無機着色顔料の含有量は、１０～５５質量％の範囲内であることが、意匠性の観点からみて好ましい。なお、無機着色顔料の含有量は、１５質量％以上がより好ましく、２０質量％以上が更に好ましい。また、無機着色顔料の含有量は、４０質量％以下であることがより好ましく、３０質量％以下であることが更に好ましい。 Further, the content of the inorganic coloring pigment in the heat resistant resin layer 3 is preferably in the range of 10 to 55 mass% from the viewpoint of designability. The content of the inorganic coloring pigment is more preferably 15% by mass or more, further preferably 20% by mass or more. The content of the inorganic coloring pigment is more preferably 40% by mass or less, further preferably 30% by mass or less.
　耐熱樹脂層３に含まれる耐熱樹脂は、高い耐熱性を有するものであることが好ましい。このような耐熱樹脂として、例えばシリコーン樹脂が挙げられる。耐熱樹脂層３に含まれるシリコーン樹脂は、例えば、シリコン原子に直接結合した官能基が、メチル基及びフェニル基のうち少なくとも一方であるシリコーン樹脂であることが好ましい。この場合、トッププレート１が高温になったときの耐熱樹脂層３の変色をより一層効果的に抑制することができる。 The heat-resistant resin contained in the heat-resistant resin layer 3 preferably has high heat resistance. Examples of such heat-resistant resin include silicone resin. The silicone resin contained in the heat-resistant resin layer 3 is preferably, for example, a silicone resin in which a functional group directly bonded to a silicon atom is at least one of a methyl group and a phenyl group. In this case, discoloration of the heat-resistant resin layer 3 when the top plate 1 becomes hot can be suppressed more effectively.
　耐熱樹脂層３中におけるシリコーン樹脂の含有量は、２０～５０質量％の範囲内であることが、耐熱性や耐衝撃性の観点からみて好ましい。なお、シリコーン樹脂の含有量は、２５質量％以上がより好ましく、３０質量％以上が更に好ましい。また、シリコーン樹脂の含有量は、４５質量％以下がより好ましく、４０質量％以下が更に好ましい。 The content of the silicone resin in the heat resistant resin layer 3 is preferably in the range of 20 to 50 mass% from the viewpoint of heat resistance and impact resistance. The content of the silicone resin is more preferably 25% by mass or more, further preferably 30% by mass or more. Further, the content of the silicone resin is more preferably 45% by mass or less, further preferably 40% by mass or less.
　耐熱樹脂層３の厚みは、耐熱樹脂層３の光透過率などに応じて適宜設定することができる。耐熱樹脂層３の厚みは、例えば、５～２０μｍの範囲内とすることができる。なお、耐熱樹脂層３の厚みは、１０～１５μｍの範囲内であることがより好ましい。 The thickness of the heat resistant resin layer 3 can be appropriately set according to the light transmittance of the heat resistant resin layer 3 and the like. The heat-resistant resin layer 3 can have a thickness of, for example, 5 to 20 μm. The thickness of the heat resistant resin layer 3 is more preferably in the range of 10 to 15 μm.
　なお、耐熱樹脂層３は、鉛筆硬度２Ｈ以上であることが好ましい。ここで、鉛筆硬度とは、ＪＩＳ　Ｋ５６００－５－４（１９９９年）の鉛筆硬度試験に従って測定された硬度である。鉛筆硬度が２Ｈ以上であれば、裏面に傷が付き難いトッププレート１を得ることができる。 The heat-resistant resin layer 3 preferably has a pencil hardness of 2H or more. Here, the pencil hardness is the hardness measured according to the pencil hardness test of JIS K5600-5-4 (1999). If the pencil hardness is 2H or more, the top plate 1 that is unlikely to have scratches on the back surface can be obtained.
　（トッププレート１の製造方法）
　トッププレート１は、例えば、以下の方法により製造することができる。
　まず、耐熱樹脂と、フレーク状の無機フィラー粉末と、無機着色顔料粉末と、体質顔料粉末とを含むペーストを用意する。次に、用意したペーストをガラス基板２の裏面２ｂ上に直接塗布し、乾燥させる。それによって、耐熱樹脂層３を有するトッププレート１を製造することができる。なお、耐熱樹脂層３の組成によっては、乾燥後に焼成を行うことによって、トッププレート１を得てもよい。 (Method of manufacturing top plate 1)
The top plate 1 can be manufactured by the following method, for example.
First, a paste containing a heat-resistant resin, flaky inorganic filler powder, inorganic coloring pigment powder, and extender pigment powder is prepared. Next, the prepared paste is directly applied on the back surface 2b of the glass substrate 2 and dried. Thereby, the top plate 1 having the heat resistant resin layer 3 can be manufactured. Depending on the composition of the heat resistant resin layer 3, the top plate 1 may be obtained by baking after drying.
　ペーストの塗布スピード及び粘度は、耐熱樹脂層３に含まれるフレーク状の無機フィラー粉末、無機着色顔料粉末及び体質顔料粉末の含有量に応じて適宜設定することができる。例えば、耐熱樹脂層３におけるフレーク状の無機フィラー粉末、無機着色顔料粉末及び体質顔料粉末の含有量が多い場合は、ペーストの粘度を低くし、シリコーン樹脂の塗布スピードを遅くすることが好ましい。ペーストの粘度を低くする方法としては、耐熱樹脂の種類を変更したり、ペーストに溶媒を加える方法が挙げられる。 The paste application speed and viscosity can be appropriately set according to the contents of the flake-like inorganic filler powder, the inorganic color pigment powder, and the extender pigment powder contained in the heat resistant resin layer 3. For example, when the content of the flake-like inorganic filler powder, the inorganic coloring pigment powder and the extender pigment powder in the heat resistant resin layer 3 is large, it is preferable to lower the viscosity of the paste and slow the coating speed of the silicone resin. Examples of the method for reducing the viscosity of the paste include changing the type of heat-resistant resin and adding a solvent to the paste.
　塗布したペーストの乾燥温度としては、例えば、５０℃～１００℃程度とすることができる。乾燥時間としては、例えば、５分～１時間程度とすることができる。
　このように、本実施形態の製造方法では、耐熱樹脂と、フレーク状の無機フィラー粉末と、着色顔料粉末と、体質顔料粉末とを含むペーストをガラス基板２の裏面２ｂ上に直接塗布し、乾燥させることによりトッププレート１が製造されるので、ガラス基板２の裏面２ｂにガラスフリットを焼き付ける工程が存在しない。そのため、ガラス基板２の裏側に引張応力が発生し難く、ガラス基板２の調理面２ａに荷重や衝撃が加わった際に、トッププレート１が破損し難い。また、ガラスフリットを生焼け状態で焼き付ける必要もないため、意匠性が低下し難い。よって、本実施形態の製造方法で得られたトッププレート１は、意匠性を損なうことなく、耐熱性及び耐衝撃性を高めることができる。 The drying temperature of the applied paste can be, for example, about 50°C to 100°C. The drying time can be, for example, about 5 minutes to 1 hour.
As described above, in the manufacturing method of the present embodiment, the paste containing the heat-resistant resin, the flaky inorganic filler powder, the coloring pigment powder, and the extender pigment powder is directly applied onto the back surface 2b of the glass substrate 2 and dried. Since the top plate 1 is manufactured by doing so, there is no step of baking the glass frit on the back surface 2b of the glass substrate 2. Therefore, tensile stress is unlikely to occur on the back side of the glass substrate 2, and the top plate 1 is less likely to be damaged when a load or impact is applied to the cooking surface 2a of the glass substrate 2. Further, since it is not necessary to burn the glass frit in a raw state, the designability is unlikely to deteriorate. Therefore, the top plate 1 obtained by the manufacturing method of the present embodiment can have improved heat resistance and impact resistance without impairing the design.
　以下、本発明について、実施例に基づいてさらに詳細を説明する。但し、以下の実施例は、単なる例示である。本発明は、以下の実施例に何ら限定されない。 Hereinafter, the present invention will be described in more detail based on examples. However, the following embodiments are merely examples. The present invention is not limited to the following examples.
　（実施例１）
　まず、焼成後の膜構成比がシリコーン樹脂５４質量％（樹脂固形分）と、Ｃｕ－Ｆｅ－Ｍｎ系の黒色顔料（平均粒子径：１μｍ）１５質量％と、タルクの体質顔料（平均粒子径：２０μｍ）１５質量％と、フレーク状のアルミナフィラー粉末（モース硬度：９、平均粒子径：２５μｍ）１６質量％となるように混合した。次に、これらの混合物１００質量％に対して、有機溶剤を１７．８質量％添加してペーストを作製した。次に、このペーストを透明結晶化ガラス板（日本電気硝子社製、商品名「Ｎ－０」、３０℃～７５０℃における平均線熱膨張係数：０．５×１０－７／℃、厚み４ｍｍ）の全体の上に、厚みが１０μｍとなるように、スクリーン印刷した。その後、１００℃で１０分間乾燥させ、さらに３２０℃で１５分間焼成することにより耐熱樹脂層を形成し、調理器用トッププレート（トッププレート）を作製した。 (Example 1)
First, the film composition ratio after firing is 54% by mass of silicone resin (resin solid content), 15% by mass of Cu—Fe—Mn-based black pigment (average particle size: 1 μm), and extant pigment of talc (average particle size). : 20 μm) and 15 mass% of flakes of alumina filler powder (Mohs hardness: 9, average particle diameter: 25 μm) were mixed so as to be 16 mass %. Next, 17.8 mass% of an organic solvent was added to 100 mass% of these mixtures to prepare a paste. Next, this paste was applied to a transparent crystallized glass plate (Nippon Electric Glass Co., Ltd., trade name “N-0”, average linear thermal expansion coefficient at 30° C. to 750° C.: 0.5×10 −7 /° C., thickness 4 mm. ) Was screen-printed so that the thickness was 10 μm. Then, it was dried at 100° C. for 10 minutes and further baked at 320° C. for 15 minutes to form a heat-resistant resin layer, and a cooker top plate (top plate) was produced.
　（実施例２）
　焼成後の膜構成比がシリコーン樹脂５３質量％（樹脂固形分）と、Ｃｕ－Ｆｅ－Ｍｎ系の黒色顔料（平均粒子径：１μｍ）１１質量％と、タルクの体質顔料（平均粒子径：２０μｍ）１１質量％と、フレーク状のアルミナフィラー粉末（モース硬度：９、平均粒子径：２５μｍ）２５質量％となるように混合した以外は実施例１と同様の方法で調理器用トッププレート（トッププレート）を作製した。 (Example 2)
The film composition ratio after firing is 53% by mass of silicone resin (resin solid content), 11% by mass of Cu—Fe—Mn-based black pigment (average particle size: 1 μm), and extender pigment of talc (average particle size: 20 μm). ) 11% by mass and flake-shaped alumina filler powder (Mohs hardness: 9, average particle size: 25 μm) were mixed in an amount of 25% by mass, except that the mixture was mixed in the same manner as in Example 1 to prepare a top plate for cookers (top plate). ) Was produced.
　（実施例３）
　焼成後の膜構成比がシリコーン樹脂６７質量％（樹脂固形分）と、Ｃｕ－Ｆｅ－Ｍｎ系の黒色顔料（平均粒子径：１μｍ）１２質量％と、タルクの体質顔料（平均粒子径：２０μｍ）１２質量％と、フレーク状のアルミナフィラー粉末（モース硬度：９、平均粒子径：２５μｍ）９質量％となるように混合した以外は実施例１と同様の方法で調理器用トッププレート（トッププレート）を作製した。 (Example 3)
The film composition ratio after firing is 67% by mass of silicone resin (resin solid content), 12% by mass of Cu—Fe—Mn-based black pigment (average particle size: 1 μm), and extender pigment of talc (average particle size: 20 μm). ) 12% by mass and flaky alumina filler powder (Mohs hardness: 9, average particle size: 25 μm) were mixed so as to be 9% by mass, and the same procedure as in Example 1 was repeated. ) Was produced.
　（比較例１）
　まず、焼成後の膜構成比がシリコーン樹脂５４質量％（樹脂固形分）と、Ｃｕ－Ｆｅ－Ｍｎ系の黒色顔料（平均粒子径：１μｍ）１５質量％と、タルクの体質顔料（平均粒子径：２０μｍ）３１質量％となるように混合した。次に、これらの混合物１００質量％に対して、有機溶剤を１７．８質量％添加してペーストを作製した。次に、このペーストを透明結晶化ガラス板（日本電気硝子社製、商品名「Ｎ－０」、３０℃～７５０℃における平均線熱膨張係数：０．５×１０－７／℃、厚み４ｍｍ）の全体の上に、厚みが１０μｍとなるように、スクリーン印刷した。その後、１００℃で１０分間乾燥させ、さらに３２０℃で１５分間焼成することにより耐熱樹脂層を形成し、調理器用トッププレート（トッププレート）を作製した。 (Comparative Example 1)
First, the film composition ratio after firing is 54% by mass of silicone resin (resin solid content), 15% by mass of Cu—Fe—Mn-based black pigment (average particle size: 1 μm), and extant pigment of talc (average particle size). : 20 μm) 31% by mass were mixed. Next, 17.8 mass% of an organic solvent was added to 100 mass% of these mixtures to prepare a paste. Next, this paste was applied to a transparent crystallized glass plate (Nippon Electric Glass Co., Ltd., trade name “N-0”, average linear thermal expansion coefficient at 30° C. to 750° C.: 0.5×10 −7 /° C., thickness 4 mm. ) Was screen-printed so that the thickness was 10 μm. Then, it was dried at 100° C. for 10 minutes and further baked at 320° C. for 15 minutes to form a heat-resistant resin layer, and a cooker top plate (top plate) was produced.
　（比較例２）
　まず、焼成後の膜構成比がシリコーン樹脂５４質量％（樹脂固形分）と、Ｃｕ－Ｆｅ－Ｍｎ系の黒色顔料（平均粒子径：１μｍ）１５質量％と、タルクの体質顔料（平均粒子径：２０μｍ）１５質量％と、フレーク状のマイカフィラー粉末（モース硬度：２．８、平均粒子径：２５μｍ）１６質量％となるように混合した。次に、これらの混合物１００質量％に対して、有機溶剤を１７．８質量％添加してペーストを作製した。次に、このペーストを透明結晶化ガラス板（日本電気硝子社製、商品名「Ｎ－０」、３０℃～７５０℃における平均線熱膨張係数：０．５×１０－７／℃、厚み４ｍｍ）の全体の上に、厚みが１０μｍとなるように、スクリーン印刷した。その後、１００℃で１０分間乾燥させ、さらに３２０℃で１５分間焼成することにより耐熱樹脂層を形成し、調理器用トッププレート（トッププレート）を作製した。 (Comparative example 2)
First, the film composition ratio after firing is 54% by mass of silicone resin (resin solid content), 15% by mass of Cu—Fe—Mn-based black pigment (average particle size: 1 μm), and extant pigment of talc (average particle size). : 20 μm) and flake-shaped mica filler powder (Mohs hardness: 2.8, average particle size: 25 μm) 16% by mass. Next, 17.8 mass% of an organic solvent was added to 100 mass% of these mixtures to prepare a paste. Next, this paste was applied to a transparent crystallized glass plate (Nippon Electric Glass Co., Ltd., trade name “N-0”, average linear thermal expansion coefficient at 30° C. to 750° C.: 0.5×10 −7 /° C., thickness 4 mm. ) Was screen-printed so that the thickness was 10 μm. Then, it was dried at 100° C. for 10 minutes and further baked at 320° C. for 15 minutes to form a heat-resistant resin layer, and a cooker top plate (top plate) was produced.
　（鉛筆硬度）
　トッププレートの上記層が形成された側において、鉛筆硬度試験（ＪＩＳ　Ｋ５６００－５－４（１９９９年））によって、耐傷性の評価を行った。なお、上記硬度試験の結果を鉛筆硬度とする。
　実施例１～３については、鉛筆硬度が２Ｈであった。一方、比較例１の鉛筆硬度はＨＢであり、比較例２の鉛筆硬度はＨであった。 (Pencil hardness)
On the side of the top plate on which the above layer was formed, scratch resistance was evaluated by a pencil hardness test (JIS K5600-5-4 (1999)). The pencil hardness is the result of the hardness test.
The pencil hardness of Examples 1 to 3 was 2H. On the other hand, the pencil hardness of Comparative Example 1 was HB, and the pencil hardness of Comparative Example 2 was H.
　１　　調理器用トッププレート
　２　　ガラス基板
　２ａ　　調理面
　２ｂ　　裏面
　３　　耐熱樹脂層 1 top plate for cooking device 2 glass substrate 2a cooking surface 2b back surface 3 heat-resistant resin layer

Claims (6)

  1. 　調理器具が接する調理面と、前記調理面と対向する裏面とを有するガラス板と、
    　前記ガラス板の裏面に接して設けられた耐熱樹脂層を有する調理器用トッププレートであって、
    　前記耐熱樹脂層は、耐熱性を有する耐熱樹脂と、モース硬度３以上のフレーク状の無機フィラーとを含む、
    　調理器用トッププレート。     A glass plate having a cooking surface with which the cooking utensil contacts, and a back surface facing the cooking surface;
    A top plate for a cooker having a heat-resistant resin layer provided in contact with the back surface of the glass plate,
    The heat-resistant resin layer contains a heat-resistant resin having heat resistance and a flaky inorganic filler having a Mohs hardness of 3 or more,
    Top plate for cookers.
  2. 　前記フレーク状の無機フィラーが、アルミナフィラーを含む、
    　請求項１に記載の調理器用トッププレート。     The flaky inorganic filler contains an alumina filler,
    The top plate for a cooker according to claim 1.
  3. 　前記フレーク状の無機フィラーの平均粒子径が５～４０μｍである、
    　請求項１または２に記載の調理器用トッププレート。     The average particle diameter of the flaky inorganic filler is 5 to 40 μm,
    The top plate for a cooker according to claim 1 or 2.
  4. 　前記耐熱樹脂が、シリコーン樹脂を含む、
    　請求項１～３の何れか一項に記載の調理器用トッププレート。     The heat-resistant resin contains a silicone resin,
    The top plate for a cooker according to any one of claims 1 to 3.
  5. 　前記耐熱樹脂層が、前記フレーク状の無機フィラーを５～４０質量％含む、
    　請求項１～４の何れか一項に記載の調理器用トッププレート。     The heat-resistant resin layer contains the flaky inorganic filler in an amount of 5 to 40% by mass.
    The top plate for a cooker according to any one of claims 1 to 4.
  6. 　前記耐熱樹脂層の鉛筆硬度が２Ｈ以上である、
    　請求項１～５の何れか一項に記載の調理器用トッププレート。     The heat-resistant resin layer has a pencil hardness of 2H or more,
    The top plate for a cooker according to any one of claims 1 to 5.
PCT/JP2019/048293 2018-12-12 2019-12-10 Top plate for cooking device WO2020122069A1 (en)

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JP2018-232785 2018-12-12

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DE102022118562A1 (en) 2022-07-25 2024-01-25 Schott Ag Glass or glass ceramic plate comprising at least one coating arranged on one side and a method for producing it

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JP7519011B2 (en) 2020-09-28 2024-07-19 日本電気硝子株式会社 Cooking Appliance Top Plate
EP4354023A1 (en) 2021-06-07 2024-04-17 Nippon Electric Glass Co., Ltd. Cooker top plate
WO2023120207A1 (en) 2021-12-22 2023-06-29 日本電気硝子株式会社 Cooker top plate

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JP2015523945A (en) * 2012-04-20 2015-08-20 ショット アクチエンゲゼルシャフトＳｃｈｏｔｔ ＡＧ Glass substrate or glass ceramic substrate with decorative coating and method for producing the same
WO2018047428A1 (en) * 2016-09-06 2018-03-15 日本電気硝子株式会社 Cooking device top plate and manufacturing method for same

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JPH0491282A (en) * 1990-07-27 1992-03-24 Nitto Boseki Co Ltd Flooring material
JP2011177962A (en) * 2010-02-26 2011-09-15 Nisshin Steel Co Ltd Precoated stainless steel sheet and jig for manufacturing crystal oscillator
JP2015523945A (en) * 2012-04-20 2015-08-20 ショット アクチエンゲゼルシャフトＳｃｈｏｔｔ ＡＧ Glass substrate or glass ceramic substrate with decorative coating and method for producing the same
WO2018047428A1 (en) * 2016-09-06 2018-03-15 日本電気硝子株式会社 Cooking device top plate and manufacturing method for same

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102022118562A1 (en) 2022-07-25 2024-01-25 Schott Ag Glass or glass ceramic plate comprising at least one coating arranged on one side and a method for producing it
EP4311811A1 (en) 2022-07-25 2024-01-31 Schott Ag Glass or glass ceramic panel comprising at least one coating arranged on one side and method for producing same

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