WO2023120207A1 - 調理器用トッププレート - Google Patents
調理器用トッププレート Download PDFInfo
- Publication number
- WO2023120207A1 WO2023120207A1 PCT/JP2022/045253 JP2022045253W WO2023120207A1 WO 2023120207 A1 WO2023120207 A1 WO 2023120207A1 JP 2022045253 W JP2022045253 W JP 2022045253W WO 2023120207 A1 WO2023120207 A1 WO 2023120207A1
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- WIPO (PCT)
- Prior art keywords
- layer
- pigment
- heat
- resistant resin
- resin layer
- Prior art date
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- 229920006015 heat resistant resin Polymers 0.000 claims abstract description 252
- 239000013078 crystal Substances 0.000 claims abstract description 128
- 239000011521 glass Substances 0.000 claims abstract description 104
- 239000000758 substrate Substances 0.000 claims abstract description 90
- 229920002050 silicone resin Polymers 0.000 claims abstract description 72
- 238000010411 cooking Methods 0.000 claims abstract description 20
- 239000010410 layer Substances 0.000 claims description 616
- 229910052751 metal Inorganic materials 0.000 claims description 29
- 239000002184 metal Substances 0.000 claims description 29
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- 239000002344 surface layer Substances 0.000 claims description 16
- 239000004606 Fillers/Extenders Substances 0.000 claims description 13
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 12
- NJLLQSBAHIKGKF-UHFFFAOYSA-N dipotassium dioxido(oxo)titanium Chemical compound [K+].[K+].[O-][Ti]([O-])=O NJLLQSBAHIKGKF-UHFFFAOYSA-N 0.000 claims description 8
- -1 aluminum compound Chemical class 0.000 claims description 6
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- 229910052618 mica group Inorganic materials 0.000 claims description 6
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 claims description 5
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 4
- 239000000378 calcium silicate Substances 0.000 claims description 4
- 229910052918 calcium silicate Inorganic materials 0.000 claims description 4
- OYACROKNLOSFPA-UHFFFAOYSA-N calcium;dioxido(oxo)silane Chemical compound [Ca+2].[O-][Si]([O-])=O OYACROKNLOSFPA-UHFFFAOYSA-N 0.000 claims description 4
- 239000000843 powder Substances 0.000 description 37
- 235000019589 hardness Nutrition 0.000 description 36
- 230000000694 effects Effects 0.000 description 27
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- 230000001965 increasing effect Effects 0.000 description 19
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- 239000003086 colorant Substances 0.000 description 6
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- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 4
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical group [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- LAQFLZHBVPULPL-UHFFFAOYSA-N methyl(phenyl)silicon Chemical compound C[Si]C1=CC=CC=C1 LAQFLZHBVPULPL-UHFFFAOYSA-N 0.000 description 4
- 229910052710 silicon Inorganic materials 0.000 description 4
- 239000010936 titanium Substances 0.000 description 4
- 238000002834 transmittance Methods 0.000 description 4
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- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- 239000003054 catalyst Substances 0.000 description 3
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 3
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 3
- 239000003960 organic solvent Substances 0.000 description 3
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 3
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- MZZSDCJQCLYLLL-UHFFFAOYSA-N Secalonsaeure A Natural products COC(=O)C12OC3C(CC1=C(O)CC(C)C2O)C(=CC=C3c4ccc(O)c5C(=O)C6=C(O)CC(C)C(O)C6(Oc45)C(=O)OC)O MZZSDCJQCLYLLL-UHFFFAOYSA-N 0.000 description 2
- 229910010413 TiO 2 Inorganic materials 0.000 description 2
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 2
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- 229910052623 talc Inorganic materials 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 229910052719 titanium Inorganic materials 0.000 description 2
- LWIHDJKSTIGBAC-UHFFFAOYSA-K tripotassium phosphate Chemical compound [K+].[K+].[K+].[O-]P([O-])([O-])=O LWIHDJKSTIGBAC-UHFFFAOYSA-K 0.000 description 2
- 239000004034 viscosity adjusting agent Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229910052725 zinc Inorganic materials 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 229910020639 Co-Al Inorganic materials 0.000 description 1
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- 241000467686 Eschscholzia lobbii Species 0.000 description 1
- 229910018068 Li 2 O Inorganic materials 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- 229910006501 ZrSiO Inorganic materials 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 229920000180 alkyd Polymers 0.000 description 1
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical class [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 description 1
- 239000005388 borosilicate glass Substances 0.000 description 1
- 239000001058 brown pigment Substances 0.000 description 1
- 238000005229 chemical vapour deposition Methods 0.000 description 1
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- 239000011256 inorganic filler Substances 0.000 description 1
- 229910003475 inorganic filler Inorganic materials 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000011812 mixed powder Substances 0.000 description 1
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Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
- B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
- B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
-
- 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
-
- 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
- C03C17/34—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions
-
- 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 relates to a cooker top plate.
- Induction cookers, radiant heater cookers, and gas cookers are equipped with cooker top plates.
- the cooker top plate is provided with a glass substrate having a cooking surface on which cooking utensils are placed and a back surface opposite to the cooking surface. Further, a heat-resistant resin layer containing a silicone resin is provided on the back surface of the glass substrate in order to conceal the internal structure of the cooker and to improve heat resistance.
- a cooker top plate includes:
- a glass plate and a heat-resistant resin layer provided in contact with the back surface of the glass plate are provided, and the heat-resistant resin layer is composed of a heat-resistant resin and flake-shaped particles having a Mohs hardness of 3 or more.
- a cooker top plate comprising an inorganic filler.
- the heat-resistant resin layer of the cooker's top plate may come into contact with the surrounding parts, and the heat-resistant resin layer may be damaged. Therefore, the heat-resistant resin layer is required to have high scratch resistance.
- An object of the present invention is to provide a cooker top plate that can improve the scratch resistance and adhesion of the heat-resistant resin layer.
- a cooker top plate comprises a glass substrate having a cooking surface on which cooking utensils are placed and a back surface opposite to the cooking surface, and a heat-resistant resin layer disposed on the back surface of the glass substrate. and wherein the heat-resistant resin layer has a layer (X) containing a silicone resin and a pigment, and the pigment in the layer (X) has a Mohs hardness of 2.5 or more.
- the total content with the crystal pigment (B) is 85% by mass or more, and in the layer (X), the content of the scale-like pigment (A) relative to the content of the needle-like crystal pigment (B)
- the mass ratio (content of scale-like pigment (A)/content of needle-like crystal pigment (B)) is characterized by being 1.0 or more and 35.0 or less.
- the scale-like pigment (A) in the layer (X) contains at least one of a metal pigment (A1) and an extender pigment (A2) different from the metal pigment. preferably included.
- the metal pigment (A1) in the layer (X) preferably contains at least one of aluminum and an aluminum compound.
- the content of the metal pigment (A1) in 100% by mass of the layer (X) is preferably 10% by mass or more and 55% by mass or less.
- the extender pigment (A2) in the layer (X) preferably contains mica.
- the needle crystal pigment (B) in the layer (X) contains at least one selected from the group consisting of potassium titanate, calcium silicate, and titanium oxide. is preferred.
- the needle crystal pigment (B) in the layer (X) preferably contains potassium titanate.
- the heat-resistant resin layer has a single-layer structure consisting of only the layer (X).
- the heat-resistant resin layer preferably has a structure of two or more layers.
- the surface layer of the heat-resistant resin layer on the side opposite to the glass substrate side is the layer (X).
- FIG. 1 is a schematic cross-sectional view showing a cooker top plate according to a first embodiment of the present invention.
- FIG. 2 is a schematic cross-sectional view showing a cooker top plate according to a second embodiment of the present invention.
- FIG. 3 is a schematic cross-sectional view showing a cooker top plate according to a third embodiment of the present invention.
- FIG. 4 is a schematic cross-sectional view showing a cooker top plate according to a fourth embodiment of the present invention.
- FIG. 5 is a schematic cross-sectional view showing a cooker top plate according to a fifth embodiment of the present invention.
- FIG. 1 is a schematic cross-sectional view showing a cooker top plate according to a first embodiment of the present invention.
- a cooker top plate 1 shown in FIG. 1 includes a glass substrate 2 .
- the glass substrate 2 has a cooking surface 2a and a back surface 2b.
- the cooking surface 2a and the back surface 2b are surfaces facing each other.
- the cooking surface 2a is the surface on which cooking utensils such as pots and frying pans are placed.
- the back surface 2b is a surface facing the light source and the heating device inside the cooker. Therefore, the cooking surface 2a and the back surface 2b are in the relationship of the front and back.
- a heat-resistant resin layer 3 is arranged on the back surface 2 b of the glass substrate 2 .
- the back surface 2b of the glass substrate 2 and the heat-resistant resin layer 3 are in contact with each other.
- the heat-resistant resin layer 3 has a first layer 4 and a second layer 5 . More specifically, the first layer 4 is arranged on the rear surface 2 b of the glass substrate 2 , and the second layer 5 is arranged on the first layer 4 .
- the first layer 4 is a surface layer of the heat-resistant resin layer 3 on the glass substrate 2 side.
- the second layer 5 is the surface layer of the heat-resistant resin layer 3 on the side opposite to the glass substrate 2 side.
- the heat-resistant resin layer 3 contains a silicone resin and a pigment. and a layer (X) containing a needle-shaped crystal pigment having a hardness of 2.5 or more (hereinafter sometimes referred to as needle-shaped crystal pigment (B)).
- the first layer 4 and the second layer 5 each contain a silicone resin and a pigment, and the pigment contains a scale-like pigment (A) and a needle-like crystal pigment (B).
- Layer (X) ).
- the total content of the scale-like pigment (A) and the needle-like crystal pigment (B) is 85% by mass or more based on 100% by mass of the pigment, and the content of the scale-like pigment (A) is , the mass ratio to the content of the needle-like crystal pigment (B) (content of scale-like pigment (A)/content of needle-like crystal pigment (B)) is 1.0 or more and 35.0 or less.
- the layer (X) is a layer having all of the configurations of (1X), (2X) and (3X) below.
- the cooker top plate 1 Since the cooker top plate 1 has the above configuration, it is possible to improve the scratch resistance and adhesion of the heat-resistant resin layer 3 .
- the scale-like pigment (A) has high strength in the direction parallel to the orientation direction, but relatively low strength in the direction perpendicular to the orientation direction.
- the needle-like crystal pigment (B) has an elongated shape and is inferior in strength to the scale-like pigment (A). is large.
- the present inventors have found that in at least one of the layers constituting the heat-resistant resin layer, the total content of the scale-like pigment (A) and the needle-like crystal pigment (B) in the pigment is increased, and the scale-like It was found that by using the pigment (A) and the needle-like crystal pigment (B) in a specific mass ratio, both the scratch resistance and adhesion of the heat-resistant resin layer can be enhanced.
- the heat-resistant resin layer may have layers other than the layer (X), as described later in FIG.
- layers other than the layer (X) which the heat-resistant resin layer may have are sometimes referred to as "layer (Y)". That is, layer (Y) is a layer that does not have at least one of the following configurations (1Y), (2Y) and (3Y).
- a silicone resin and a pigment wherein the pigment includes a scaly pigment having a Mohs hardness of 2.5 or more and a needle crystal pigment having a Mohs hardness of 2.5 or more.
- the total content of the scale pigment having a Mohs hardness of 2.5 or more and the needle crystal pigment having a Mohs hardness of 2.5 or more is 85% by weight or more in 100% by weight of the pigment.
- (3Y) Mass ratio of the content of the scale-like pigment having a Mohs hardness of 2.5 or more to the content of the needle-like crystal pigment having a Mohs hardness of 2.5 or more is 1.0 or more and 35.0 or less.
- the glass substrate 2 is preferably a glass substrate that transmits at least part of light having a wavelength of 450 nm to 700 nm.
- the glass substrate 2 is preferably a transparent glass substrate.
- the glass substrate 2 may be colored and transparent, but is preferably colorless and transparent from the viewpoint of further enhancing the appearance of the cooker top plate.
- the term “transparent” in the glass substrate means that the light transmittance in the visible wavelength range is 70% or more 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, more preferably 750° C. or higher.
- the average coefficient of linear thermal expansion of the glass substrate 2 at 30° C. to 750° C. is preferably within the range of ⁇ 10 ⁇ 10 ⁇ 7 /° C. to +60 ⁇ 10 ⁇ 7 /° C., and ⁇ 10 ⁇ 10 ⁇ 7 /°C to +50 x 10 -7 /°C, and more preferably -10 x 10 -7 /°C to +40 x 10 -7 /°C.
- the glass substrate 2 is preferably made of low-expansion glass or low-expansion crystallized glass having a high glass transition temperature.
- the low-expansion crystallized glass include LAS-based crystallized glass “N-0” manufactured by Nippon Electric Glass Co., Ltd., and the like. Note that a borosilicate glass substrate or the like may be used as the glass substrate.
- the thickness of the glass substrate 2 is not particularly limited.
- the thickness of the glass substrate 2 can be appropriately set according to the light transmittance and the like.
- the thickness of the glass substrate 2 can be, for example, about 2 mm to 6 mm.
- the heat-resistant resin layer 3 is arranged on the rear surface 2 b of the glass substrate 2 .
- the heat-resistant resin layer 3 has a two-layer structure. That is, the heat-resistant resin layer 3 has a first layer 4 and a second layer 5 arranged on the surface of the first layer 4 opposite to the glass substrate 2 side.
- the first layer 4 and the second layer 5 are preferably colored in different colors.
- the first layer 4 can be a white layer and the second layer 5 can be a gray layer.
- the colors of the first layer 4 and the second layer 5 are not particularly limited, and can be appropriately determined in consideration of the design and concealability of the internal structure of the cooker.
- the first layer 4 and the second layer 5 each contain a silicone resin and a pigment. Moreover, the pigment contained in the first layer 4 and the pigment contained in the second layer 5 each contain a scale-like pigment (A) and a needle-like crystal pigment (B).
- the heat-resistant resin layer 3 may have at least one layer (X) containing the scale-like pigment (A) and the needle-like crystal pigment (B). That is, in the heat-resistant resin layer 3, the first layer 4 may be the layer (X), the first layer 4 may be the layer (Y), and the second layer 5 may be the layer (X ), the second layer 5 may be the layer (Y), and the first layer 4 and the second layer 5 may each be the layer (X).
- each of the first layer 4 and the second layer 5 is preferably the layer (X).
- Layer (X) contains a silicone resin.
- the heat-resistant resin layer 3 contains silicone resin.
- As the silicone resin conventionally known silicone resins used for the heat-resistant resin layer of the top plate for cookers can be used.
- the layer (Y), the first layer 4 and the second layer 5 each preferably contain a silicone resin.
- heat-resistant resin layer 3 has a structure of two or more layers, all layers of heat-resistant resin layer 3 preferably contain a silicone resin. Only one type of the silicone resin may be used, or two or more types may be used in combination.
- the silicone resin contained in each layer of the heat-resistant resin layer 3 may be the same or different.
- a silicone resin having high heat resistance is preferably used as the silicone resin.
- the above-mentioned silicone resin may contain, for example, methyl in the silicon atom.
- a silicone resin having a structure in which groups or phenyl groups are directly bonded is preferred. In this case, a methyl group may be directly bonded to the silicon atom, a phenyl group may be directly bonded to the silicon atom, or a methyl group and a phenyl group may be directly bonded to the same silicon atom. good.
- the above silicone resin can be obtained by curing a silicone resin component.
- the silicone resin component may contain a monomer (monomer), may contain a silicone oligomer, or may contain a silicone resin.
- silicone resin component examples include "straight silicone varnish KR282”, “straight silicone varnish KR271”, “straight silicone varnish KR311”, “modified silicone varnish KR211”, “silicone alkyd varnish” and “silicone epoxy varnish ES100N”, and “TSR-145” manufactured by Momentive.
- the silicone resin component may contain a polyfunctional silicone oligomer.
- the heat-resistant resin layer 3 may contain a polyfunctional silicone oligomer.
- a polyfunctional silicone oligomer has a large number of hydroxyl groups serving as reaction sites and does not have an excessively large molecular weight, so that the crosslink density can be increased.
- the polyfunctional silicone oligomer since the polyfunctional silicone oligomer has a large number of hydroxyl groups, the adhesion between the heat-resistant resin layer 3 and the glass substrate 2 and the adhesion between the first layer 4 and the second layer 5 can be further enhanced. can.
- the above polyfunctional silicone oligomer is preferably a polyfunctional silicone oligomer having a hydroxyl value of 300 mgKOH/g or more after hydrolysis.
- the content of the silicone resin in the layer (X) (the content of the silicone resin in 100% by mass of the layer (X)) is preferably 20% by mass or more, more preferably 30% by mass or more, and preferably 70% by mass or less. , more preferably 60% by mass or less.
- the content of the silicone resin is at least the lower limit, the heat resistance, solvent resistance, and impact resistance of the heat-resistant resin layer 3 can be further enhanced.
- the content of the silicone resin is equal to or less than the upper limit, the mechanical strength of the cooker top plate 1 can be further enhanced.
- the content of the silicone resin in the heat-resistant resin layer 3 (the content of the silicone resin in 100% by mass of the heat-resistant resin layer) is preferably 20% by mass or more, more preferably 30% by mass or more, and preferably 70% by mass or less. More preferably, it is 60% by mass or less.
- the content of the silicone resin is at least the lower limit, the heat resistance, solvent resistance, and impact resistance of the heat-resistant resin layer 3 can be further enhanced.
- the content of the silicone resin is equal to or less than the upper limit, the mechanical strength of the cooker top plate 1 can be further enhanced.
- the content of the silicone resin in the first layer 4 (the content of the silicone resin in 100% by mass of the first layer) is preferably 20% by mass or more, more preferably 30% by mass or more, and preferably 70% by mass. 60% by mass or less, more preferably 60% by mass or less.
- the content of the silicone resin is at least the lower limit, the heat resistance, solvent resistance, and impact resistance of the heat-resistant resin layer 3 can be further enhanced.
- the content of the silicone resin is equal to or less than the upper limit, the mechanical strength of the cooker top plate 1 can be further enhanced.
- the content of the silicone resin in the second layer 5 (the content of the silicone resin in 100% by mass of the second layer) is preferably 20% by mass or more, more preferably 30% by mass or more, and preferably 70% by mass. 60% by mass or less, more preferably 60% by mass or less.
- the content of the silicone resin is at least the lower limit, the heat resistance, solvent resistance, and impact resistance of the heat-resistant resin layer 3 can be further enhanced.
- the content of the silicone resin is equal to or less than the upper limit, the mechanical strength of the cooker top plate 1 can be further enhanced.
- Layer (X) contains a pigment, and the pigment contains a scale-like pigment (A) and a needle-like crystal pigment (B).
- the heat-resistant resin layer 3 contains a pigment, and the pigment contains a scale-like pigment (A) and a needle-like crystal pigment (B).
- the layer (Y) may or may not contain a pigment.
- the scale-like pigment (A) and the needle-like crystal pigment (B) are added to 100% by mass of the pigment. is 85% by mass or more.
- the total content of the scale-like pigment (A) and the needle-like crystal pigment (B) in 100% by mass of the pigment in the layer (X) is preferably is 90% by mass or more, more preferably 95% by mass or more.
- the scale-like pigment (A) and the needle-like crystal pigment (B) are added to 100% by mass of the pigments in the heat-resistant resin layer 3.
- the total content of is preferably 50% by mass or more, more preferably 60% by mass or more, even more preferably 70% by mass or more, still more preferably 80% by mass or more, even more preferably 85% by mass or more, particularly preferably is 90% by mass or more, most preferably 95% by mass or more.
- the scale-like pigment (A) and the needle crystal pigment (B) is 85% by mass or more, preferably 90% by mass or more, more preferably 95% by mass or more.
- the first layer 4 is the layer (Y) and contains the scale-like pigment (A) and the needle-like crystal pigment (B), from the viewpoint of further increasing the scratch resistance of the heat-resistant resin layer 3, the first In the layer 4, the total content of the scale-like pigment (A) and the needle-like crystal pigment (B) in 100% by mass of the pigment is preferably 5% by mass or more, more preferably 10% by mass or more, and still more preferably is 20% by mass or more, particularly preferably 30% by mass or more.
- the scale-like pigment (A) and the needle crystal pigment (B) is 85% by mass or more, preferably 90% by mass or more, more preferably 95% by mass or more.
- the second layer 5 is the layer (Y) and contains the scale-like pigment (A) and the needle-like crystal pigment (B), from the viewpoint of further increasing the scratch resistance of the heat-resistant resin layer 3, the second In the layer 5, the total content of the scale-like pigment (A) and the needle-like crystal pigment (B) in 100% by mass of the pigment is preferably 5% by mass or more, more preferably 10% by mass or more, and still more preferably is 20% by mass or more, particularly preferably 30% by mass or more.
- the content of the pigment in 100% by mass of the pigment-containing layer is preferably 5% by mass or more, It is more preferably 10% by mass or more, preferably 70% by mass or less, and more preferably 60% by mass or less.
- the content of the pigment is equal to or more than the lower limit and equal to or less than the upper limit, the effects of the present invention can be exhibited more effectively.
- the mass ratio of the content of the scale-like pigment (A) to the content of the needle-like crystal pigment (B) is 1.0 or more and 35.0 or less.
- the mass ratio of the content of the scale-like pigment (A) to the content of the needle-like crystal pigment (B) is preferably 1.5 or more, preferably 19.0 or less, and more preferably 10.0 or less.
- the mass ratio of the content of the scale-like pigment (A) to the content of the needle-like crystal pigment (B) is preferably 1.0 or more, more preferably 1.5 or more, preferably 35.0 or less, more preferably 19.0 or less, still more preferably 10.0 It is below.
- the content of the scale-like pigment (A) in the needle-like is 1.0 or more and 35.0 or less, preferably 1 0.5 or more, preferably 19.0 or less, more preferably 10.0 or less.
- the mass ratio of the content of the scale-like pigment (A) to the content of the needle-like crystal pigment (B) is preferably 1.0 or more, more preferably 1.5 or more, preferably 19.0 or less, more preferably 10.0 or less.
- the content of the scale-like pigment (A) is 1.0 or more and 35.0 or less, preferably 1 0.5 or more, preferably 19.0 or less, more preferably 10.0 or less.
- the second layer 5 is the layer (Y) and contains the scale-like pigment (A) and the needle-like crystal pigment (B), from the viewpoint of more effectively exhibiting the effects of the present invention, the second layer 5 In the layer 5, the mass ratio of the content of the scale-like pigment (A) to the content of the needle-like crystal pigment (B) (content of the scale-like pigment (A) / content of the needle-like crystal pigment (B) ) is preferably 1.0 or more, more preferably 1.5 or more, preferably 19.0 or less, more preferably 10.0 or less.
- the scale-like pigment (A) is a scale-like pigment having a Mohs hardness of 2.5 or more.
- the heat-resistant resin layer 3 contains a scale-like pigment (A).
- the heat-resistant resin layer 3 only needs to have a layer (X) containing the scale-like pigment (A).
- all the layers of the heat-resistant resin layer 3 contain the scaly pigment (A). preferably included. Therefore, each of the first layer 4 and the second layer 5 preferably contains the scale-like pigment (A).
- the layer (Y) may contain the scaly pigment (A) or may not contain the scaly pigment (A).
- the scale-like pigment (A) only one type may be used, or two or more types may be used in combination.
- the scale-like pigments (A) contained in each layer of the heat-resistant resin layer 3 may be the same or different.
- the pigment has a scaly shape can be confirmed by observing the shape using a scanning electron microscope, a transmission electron microscope, or the like.
- the scale-like pigment (A) has a Mohs hardness of 2.5 or higher, preferably 2.6 or higher, and more preferably 2.8 or higher.
- the upper limit of the Mohs hardness of the scale-like pigment (A) is not limited, it is, for example, 10 or less, or 9 or less.
- the scratch resistance of the heat-resistant resin layer 3 can be further enhanced.
- the aspect ratio of the scale-like pigment (A) is preferably 3 or more, more preferably 5 or more, still more preferably 10 or more, preferably 80 or less, more preferably 50 or less, and still more preferably 30 or less.
- the aspect ratio is equal to or more than the lower limit and equal to or less than the upper limit, the strength of the heat-resistant resin layer 3 can be further increased, and therefore the scratch resistance of the heat-resistant resin layer 3 can be further increased.
- the aspect ratio of the scale-like pigment (A) means the ratio of the average particle size of the scale-like pigment (A) to the average thickness (average particle size/average thickness).
- the average particle size of the scale-like pigment (A) is the average particle size (D 50 ) measured with a laser diffraction particle size distribution analyzer.
- the average thickness of the scale-like pigment (A) is obtained by measuring the thickness of arbitrary 50 scale-like pigments using a scanning electron microscope and averaging the thicknesses.
- the average particle size of the scale-like pigment (A) is preferably 3 ⁇ m or more, more preferably 5 ⁇ m or more, preferably 50 ⁇ m or less, and more preferably 30 ⁇ m or less.
- the effect of the present invention can be further enhanced when the average particle size is equal to or more than the lower limit and equal to or less than the upper limit.
- the average thickness of the scale-like pigment (A) is preferably 0.1 ⁇ m or more, more preferably 0.2 ⁇ m or more, preferably 2 ⁇ m or less, more preferably 1 ⁇ m or less.
- the effect of the present invention can be further enhanced when the average thickness is equal to or more than the lower limit and equal to or less than the upper limit.
- scaly pigment (A) a metallic pigment (hereinafter sometimes referred to as a metallic pigment (A1)) and an extender pigment different from the metallic pigment (hereinafter sometimes referred to as an extender pigment (A2)) etc.
- metal pigments (A1) include aluminum, aluminum compounds, and SUS316.
- Examples of the aluminum include aluminum flakes.
- Examples of the aluminum compound include aluminum alloy flakes. Only one kind of the metal pigment (A1) may be used, or two or more kinds thereof may be used in combination.
- extender pigments (A2) include mica and talc. Only one type of the extender pigment (A2) may be used, or two or more types may be used in combination.
- the scale-like pigment (A) in the layer (layer (X), layer (Y), heat-resistant resin layer 3, first layer 4 or second layer 5) containing the scale-like pigment (A) is a metal pigment ( It preferably contains at least one of A1) and an extender pigment (A2), more preferably contains a metal pigment (A1), and further contains a metal pigment (A1) and an extender pigment (A2). preferable. In this case, the effect of the present invention can be exhibited more effectively. In particular, when the heat-resistant resin layer 3 contains the metal pigment (A1), the impact resistance of the heat-resistant resin layer 3 can be enhanced by the flexibility accompanying deformation of the metal pigment (A1).
- the metal pigment (A1) in the layer containing the metal pigment (A1) (layer (X), layer (Y), heat-resistant resin layer 3, first layer 4 or second layer 5) contains aluminum and an aluminum compound It preferably contains at least one of and more preferably contains aluminum. In this case, the impact resistance of the heat-resistant resin layer 3 can be further enhanced by the flexibility associated with deformation of aluminum or an aluminum compound.
- the extender (A2) in the layer (layer (X), layer (Y), heat-resistant resin layer 3, first layer 4 or second layer 5) containing the extender (A2) may contain mica. preferable.
- the content of the scale-like pigment (A) in the layer (X) is preferably 5% by mass or more, more preferably 10% by mass. Above, preferably 65% by mass or less, more preferably 55% by mass or less.
- the content of the scale-like pigment (A) is equal to or more than the lower limit and equal to or less than the upper limit, the scratch resistance of the heat-resistant resin layer 3 can be further enhanced.
- the content of the scale-like pigment (A) in the heat-resistant resin layer 3 is preferably 5% by mass or more, more preferably 10% by mass or more. , preferably 65% by mass or less, more preferably 55% by mass or less.
- the scratch resistance of the heat-resistant resin layer 3 can be further enhanced.
- the content of the scale-like pigment (A) in the first layer 4 is preferably 5% by mass or more, more preferably 10% by mass. % or more, preferably 65 mass % or less, more preferably 55 mass % or less.
- the scratch resistance of the heat-resistant resin layer 3 can be further enhanced.
- the content of the scale-like pigment (A) in the second layer 5 is preferably 5% by mass or more, more preferably 10% by mass. % or more, preferably 65 mass % or less, more preferably 55 mass % or less.
- the scratch resistance of the heat-resistant resin layer 3 can be further enhanced.
- the content of the metal pigment (A1) in the layer (X) is preferably 10% by mass or more, more preferably 20% by mass or more, It is preferably 55% by mass or less, more preferably 45% by mass or less, and even more preferably 40% by mass or less.
- the content of the metal pigment (A1) is equal to or more than the lower limit and equal to or less than the upper limit, the scratch resistance and impact resistance of the heat-resistant resin layer 3 can be further enhanced.
- the content of the metal pigment (A1) in the heat-resistant resin layer 3 is preferably 10% by mass or more, more preferably 20% by mass or more. is 55% by mass or less, more preferably 45% by mass or less, and still more preferably 40% by mass or less.
- the content of the metal pigment (A1) is equal to or more than the lower limit and equal to or less than the upper limit, the scratch resistance and impact resistance of the heat-resistant resin layer 3 can be further enhanced.
- the content of the metal pigment (A1) in the first layer 4 is preferably 10% by mass or more, more preferably 20% by mass or more. , preferably 55% by mass or less, more preferably 45% by mass or less, and even more preferably 40% by mass or less.
- the content of the metal pigment (A1) is equal to or more than the lower limit and equal to or less than the upper limit, the scratch resistance and impact resistance of the heat-resistant resin layer 3 can be further enhanced.
- the content of the metal pigment (A1) in the second layer 5 is preferably 10% by mass or more, more preferably 20% by mass or more. , preferably 55% by mass or less, more preferably 45% by mass or less, and even more preferably 40% by mass or less.
- the content of the metal pigment (A1) is equal to or more than the lower limit and equal to or less than the upper limit, the scratch resistance and impact resistance of the heat-resistant resin layer 3 can be further enhanced.
- Needle crystal pigment (B) is a needle crystal pigment having a Mohs hardness of 2.5 or more.
- the heat-resistant resin layer 3 contains a needle crystal pigment (B).
- the heat-resistant resin layer 3 only needs to have the layer (X) containing the needle crystal pigment (B).
- all the layers of the heat-resistant resin layer 3 contain the needle crystal pigment (B).
- each of the first layer 4 and the second layer 5 preferably contains the needle crystal pigment (B).
- the layer (Y) may contain the needle-shaped crystal pigment (B) or may not contain the needle-shaped crystal pigment (B).
- the needle crystal pigment (B) only one type may be used, or two or more types may be used in combination.
- the needle crystal pigment (B) contained in each layer of the heat-resistant resin layer 3 may be the same or different.
- the needle crystal pigment (B) is a pigment having a needle crystal structure. Whether or not the pigment has an acicular crystal structure can be confirmed by observing its shape using a scanning electron microscope, a transmission electron microscope, or the like.
- the needle crystal pigment (B) has a Mohs hardness of 2.5 or higher, preferably 3 or higher, and more preferably 4 or higher. When the Mohs hardness is equal to or higher than the lower limit, the scratch resistance of the heat-resistant resin layer 3 can be further enhanced.
- the average length of the needle crystal pigment (B) is preferably 5 ⁇ m or more, more preferably 8 ⁇ m or more, preferably 60 ⁇ m or less, more preferably 40 ⁇ m or less.
- the average length is equal to or more than the lower limit and equal to or less than the upper limit, the effects of the present invention can be exhibited more effectively.
- the average diameter of the needle crystal pigment (B) is preferably 0.1 ⁇ m or more, more preferably 0.2 ⁇ m or more, preferably 7 ⁇ m or less, and more preferably 5 ⁇ m or less. When the average diameter is at least the lower limit and at most the upper limit, the effects of the present invention can be exhibited more effectively.
- the aspect ratio of the needle crystal pigment (B) is preferably 8 or more, more preferably 10 or more, preferably 100 or less, more preferably 80 or less.
- the aspect ratio is equal to or more than the lower limit and equal to or less than the upper limit, the effects of the present invention can be exhibited more effectively.
- the average length and average diameter of the needle-shaped crystal pigment (B) are obtained by measuring the length and diameter of arbitrary 50 needle-shaped crystal pigments using a scanning electron microscope and averaging them.
- the aspect ratio of the needle crystal pigment (B) means the ratio of the average length to the average diameter (average length/average diameter) of the needle crystal pigment (B).
- needle crystal pigments (B) examples include potassium titanate, calcium silicate, and titanium oxide.
- the needle crystal pigment (B) in the layer containing the needle crystal pigment (B) contains titanium It preferably contains at least one selected from the group consisting of potassium phosphate, calcium silicate, and titanium oxide, and more preferably contains potassium titanate. In this case, the effect of the present invention can be exhibited more effectively.
- the content of the needle crystal pigment (B) in the layer (X) is preferably 1% by mass or more, more preferably 5% by mass. % by mass or more, preferably 25% by mass or less, more preferably 15% by mass or less.
- the content of the needle-like crystal pigment (B) is at least the lower limit and at most the upper limit, the effects of the present invention can be exhibited more effectively.
- the content of the needle-shaped crystal pigment (B) in the heat-resistant resin layer 3 is preferably 1% by mass or more, more preferably 5% by mass. % or more, preferably 25 mass % or less, more preferably 15 mass % or less.
- the content of the needle-like crystal pigment (B) is at least the lower limit and at most the upper limit, the effects of the present invention can be exhibited more effectively.
- the content of the needle-shaped crystal pigment (B) in the first layer 4 is preferably 1% by mass or more, more preferably It is 5% by mass or more, preferably 25% by mass or less, and more preferably 15% by mass or less.
- the content of the needle crystal pigment (B) is at least the lower limit and not more than the upper limit, the effects of the present invention can be exhibited more effectively, and the heat-resistant resin layer is formed by volume shrinkage of the silicone resin. It is possible to more effectively suppress the occurrence of breakage and cracks in 3.
- the content of the needle-shaped crystal pigment (B) in the second layer 5 is preferably 1% by mass or more, more preferably It is 5% by mass or more, preferably 25% by mass or less, and more preferably 15% by mass or less.
- the content of the needle crystal pigment (B) is at least the lower limit and at most the upper limit, the effect of the present invention can be exhibited more effectively, and in particular, the adhesion of the heat-resistant resin layer 3 can be improved. can be further enhanced.
- Color pigment The layer (X), the layer (Y), the heat-resistant resin layer 3, the first layer 4 and the second layer 5 each contain a pigment different from both the scale-like pigment (A) and the needle-like crystal pigment (B). may contain.
- the pigment include coloring pigments.
- the heat-resistant resin layer 3 contains a color pigment
- the first layer 4 contains the first color pigment
- the second layer 5 contains a second color pigment different from the first color pigment. You can stay.
- an appropriate combination of color pigments can be selected in consideration of the design and the ability to conceal the inside of the cooker. Only one kind of the color pigment may be used, or two or more kinds thereof may be used in combination.
- the surface layer of the heat-resistant resin layer 3 on the side of the glass substrate 2 contains a coloring pigment.
- the first layer 4 preferably contains a color pigment.
- the surface layer (Y) of the heat-resistant resin layer 3 on the side of the glass substrate 2 is a layer (Y) containing a coloring pigment.
- coloring pigment examples include spherical coloring pigments.
- the color pigments include white pigment powders such as TiO 2 powder, ZrO 2 powder and ZrSiO 4 powder; blue inorganic pigment powders containing Co; green inorganic pigment powders containing Co; -Ni-based yellow inorganic pigment powder; Co--Si-based red inorganic pigment powder; brown inorganic pigment powder containing Fe; black inorganic pigment powder containing Cu, and the like.
- white pigment powders such as TiO 2 powder, ZrO 2 powder and ZrSiO 4 powder
- blue inorganic pigment powders containing Co green inorganic pigment powders containing Co
- -Ni-based yellow inorganic pigment powder Co--Si-based red inorganic pigment powder
- brown inorganic pigment powder containing Fe black inorganic pigment powder containing Cu, and the like.
- blue inorganic pigment powders containing Co include Co--Al and Co--Al--Ti-based inorganic pigment powders.
- Co—Al based inorganic pigment powder include CoAl 2 O 4 powder.
- Co--Al--Ti-based inorganic pigment powders include CoAl 2 O 4 --TiO 2 --Li 2 O powders.
- Examples of green inorganic pigment powders containing Co include Co--Al--Cr-based and Co--Ni--Ti--Zn-based inorganic pigment powders.
- Co--Al--Cr inorganic pigment powders include Co(Al, Cr) 2 O 4 powders.
- Examples of the Co—Ni—Ti—Zn-based inorganic pigment powder include (Co, Ni, Zn) 2 TiO 4 powder.
- brown inorganic pigment powders containing Fe examples include Fe—Zn based inorganic pigment powders.
- the Fe—Zn based inorganic pigment powder include (Zn, Fe) Fe 2 O 4 powder and the like.
- Examples of black inorganic pigment powders containing Cu include Cu—Cr based inorganic pigment powders and Cu—Fe based inorganic pigment powders.
- Examples of the Cu--Cr inorganic pigment powder include Cu(Cr, Mn) 2 O 4 powder and Cu--Cr--Mn powder.
- Cu--Fe-based inorganic pigment powders include Cu--Fe--Mn powders.
- the thicknesses of layer (X), layer (Y), first layer 4 and second layer 5 are not particularly limited, and are each preferably 5 ⁇ m or more, more preferably 8 ⁇ m or more, more preferably 50 ⁇ m or less, and more preferably. is 30 ⁇ m or less. When the thickness of each layer is within the above range, peeling of the heat-resistant resin layer 3 due to repeated heating and cooling can be more effectively prevented, and the design and concealability of the inside of the cooker can be further improved. .
- the thickness of the entire heat-resistant resin layer 3 (the total thickness of the first layer 4 and the second layer 5) is also not particularly limited, and is preferably 5 ⁇ m or more, more preferably 10 ⁇ m or more, preferably 70 ⁇ m or less, or more. It is preferably 30 ⁇ m or less.
- the thickness of the entire heat-resistant resin layer 3 is within the above range, peeling of the heat-resistant resin layer 3 due to repeated heating and cooling can be more reliably prevented, and the design and concealability of the inside of the cooker can be further improved. be able to.
- a paste containing a silicone resin component, a scale-like pigment (A), and a needle-like crystal pigment (B) is prepared.
- the paste may contain other ingredients such as color pigments, curing catalysts, cross-linking agents, solvents, viscosity modifiers, leveling agents and anti-foaming agents.
- the first layer-forming paste and the second layer-forming paste are separately prepared.
- the solvent is not particularly limited, for example, xylene can be used.
- the first layer forming paste is applied onto the back surface 2 b of the glass substrate 2 . Subsequently, by heating the glass substrate 2 coated with the first layer forming paste, the first layer forming paste is dried and the silicone resin component is cured to form the first layer 4. . Incidentally, depending on the composition of the first layer 4, baking may be further performed after drying.
- the second layer forming paste is applied on the first layer 4 .
- the second layer forming paste is dried and the silicone resin component is cured to form a second layer forming paste.
- 2 layer 5 is formed.
- the heat-resistant resin layer 3 can be formed.
- baking may be further performed after drying.
- the paste when the paste contains aluminum or an aluminum compound as the scale-like pigment (A), it also functions as a curing catalyst for the silicone resin component, so that the curing reaction of the silicone resin component can be performed more efficiently.
- the application speed and viscosity of the paste can be appropriately set according to the content of the pigment contained in the heat-resistant resin layer 3. For example, when the content of pigment in the heat-resistant resin layer 3 is large, it is preferable to lower the viscosity of the silicone resin component by increasing the amount of solvent, and slow down the paste application speed.
- the heating temperature of the paste can be, for example, 60°C or higher and 200°C or lower.
- the heating time of the paste can be, for example, 1 minute or more and 30 minutes or less.
- the firing temperature can be, for example, 200°C or higher and 450°C or lower.
- the firing time can be, for example, 10 minutes or more and 1 hour or less.
- FIG. 2 is a schematic cross-sectional view showing a cooker top plate according to a second embodiment of the present invention.
- a cooker top plate 1A shown in FIG. 2 includes a glass substrate 2 and a heat-resistant resin layer 3A.
- the configuration of the heat-resistant resin layer differs between the cooker top plate 1A shown in FIG. 2 and the cooker top plate 1 shown in FIG. That is, the cooker top plate 1 shown in FIG. 1 is provided with the heat-resistant resin layer 3 having a two-layer structure, whereas the cooker top plate 1A shown in FIG. 2 has a one-layer structure.
- a heat resistant resin layer 3A is provided.
- the heat-resistant resin layer 3A is arranged on the back surface 2b of the glass substrate 2.
- the heat-resistant resin layer 3A is a layer (X) containing a silicone resin and a pigment, and the pigment is a scale-like pigment (A) and a needle-like crystal pigment (B).
- the heat-resistant resin layer 3A has a one-layer structure of only the layer (X).
- the silicone resin, the scale-like pigment (A), and the needle-like crystal pigment (B), those described in the first embodiment can be appropriately used.
- the heat-resistant resin layer 3A may contain a coloring pigment or the like as in the first embodiment.
- the total content of the scale-like pigment (A) and the needle-like crystal pigment (B) is 85% by mass or more in 100% by mass of the pigment in the heat-resistant resin layer 3A.
- the mass ratio of the content of (A) to the content of the needle-like crystal pigment (B) is 1.0 or more, 35.0 or less. Therefore, even in the cooker top plate 1A, the scratch resistance and adhesion of the heat-resistant resin layer 3A can be improved.
- the details of the glass substrate 2, the silicone resin, the scale-like pigment (A), the needle-like crystal pigment (B), and other components are as described in the first embodiment, so the description is omitted.
- the preferable range of each content of the silicone resin, the scale-like pigment (A), and the needle-like crystal pigment (B) in the heat-resistant resin layer 3A and the layer (X), and the mass ratio in the heat-resistant resin layer 3A (scale-like pigment A preferable form of the heat-resistant resin layer 3A, such as a preferable range of content of (A)/content of needle crystal pigment (B)) is the heat-resistant resin layer 3 and the layer (X) described in the first embodiment. Similar to the preferred form.
- the thickness of the heat-resistant resin layer 3A is not particularly limited, and is preferably 5 ⁇ m or more, more preferably 10 ⁇ m or more, preferably 50 ⁇ m or less, more preferably 30 ⁇ m or less. When the thickness of the heat-resistant resin layer 3A is within the above range, it is possible to more reliably prevent the heat-resistant resin layer 3A from peeling off due to repeated heating and cooling, and to further improve the design and the concealability of the inside of the cooker. can be done.
- the method of forming the heat-resistant resin layer 3A is also not particularly limited, and can be formed by the same method as in the first embodiment. Specifically, first, a paste containing a silicone resin component, a scale-like pigment (A), and a needle-like crystal pigment (B) is prepared.
- the paste may contain other ingredients such as color pigments, curing catalysts, cross-linking agents, solvents, viscosity modifiers, leveling agents and anti-foaming agents.
- the prepared paste is applied onto the rear surface 2 b of the glass substrate 2 . Subsequently, by heating the glass substrate 2 to which the paste has been applied, the paste is dried and the silicone resin component is cured to form the heat-resistant resin layer 3A. Depending on the composition of the heat-resistant resin layer 3A, baking may be performed after drying.
- FIG. 3 is a schematic cross-sectional view showing a cooker top plate according to a third embodiment of the present invention.
- a cooker top plate 1B shown in FIG. 3 differs from the cooker top plate 1A shown in FIG. 2 in the presence or absence of the inorganic light shielding layer.
- the inorganic light shielding layer 7 is arranged on the back surface 2 b of the glass substrate 2 .
- the heat-resistant resin layer 3B is arranged on the surface of the inorganic light shielding layer 7 opposite to the glass substrate 2 side.
- the heat-resistant resin layer 3B is arranged on the back surface 2b of the glass substrate 2 with the inorganic light shielding layer 7 interposed therebetween.
- the heat-resistant resin layer 3B is a layer (X) containing a silicone resin and a pigment, and the pigment is a scale-like pigment (A) and a needle-like crystal pigment (B).
- the heat-resistant resin layer 3B has a one-layer structure of only the layer (X).
- the same heat-resistant resin layer 3A as used in the second embodiment can be used.
- the total content of the scale-like pigment (A) and the needle-like crystal pigment (B) in 100% by mass of the pigment in the heat-resistant resin layer 3B is 85% by mass or more.
- the mass ratio of the content of the scale-like pigment (A) to the content of the needle-like crystal pigment (B) is It is 1.0 or more and 35.0 or less. Therefore, even in the cooker top plate 1B, it is possible to improve the adhesion and scratch resistance of the heat-resistant resin layer 3B.
- the details of the glass substrate 2, the silicone resin, the scale-like pigment (A), the needle-like crystal pigment (B), and other components are as described in the first embodiment, so the description is omitted.
- the preferred ranges of the contents of the silicone resin, the scale-like pigment (A), and the needle-like crystal pigment (B) in the heat-resistant resin layer 3B and the layer (X), and the mass ratio in the heat-resistant resin layer 3B (scale-like pigment A preferred form of the heat-resistant resin layer 3B, such as a preferred range of (A) content/needle crystal pigment (B) content, is the same as that of the heat-resistant resin layer 3 and layer (X) described in the first embodiment. Similar to the preferred form.
- the inorganic light shielding layer 7 is a light shielding layer provided for the purpose of concealing the structure inside the cooker. Therefore, by providing the inorganic light-shielding layer 7 together with the heat-resistant resin layer 3B, the structure inside the cooker can be more effectively hidden when viewed from the cooking surface 2a side, and the appearance of the cooker top plate 1B can be further improved. can be enhanced.
- the inorganic light shielding layer 7 is a layer containing an inorganic substance, and is not particularly limited as long as it is a layer with low visible light transmittance.
- the inorganic light shielding layer 7 is, for example, a layer containing a color pigment and glass. In this case, for example, a Cu--Cr--Mn-based black inorganic pigment can be used as the coloring pigment.
- a Cu--Cr--Mn-based black inorganic pigment can be used as the coloring pigment.
- As the glass for example, B 2 O 3 —SiO 2 based glass powder can be used.
- the inorganic light shielding layer 7 may be a metal layer such as titanium.
- the inorganic light shielding layer 7 is a porous film containing a coloring pigment and glass.
- the inorganic light shielding layer 7 is desirably a porous film, but may be a dense film having substantially no voids. If the inorganic light-shielding layer 7 is a dense film, the adhesive is less likely to seep out to the glass substrate 2 side, and stains are less conspicuous when viewed from the cooking surface 2a side.
- the thickness of the inorganic light shielding layer 7 is not particularly limited.
- the thickness of the inorganic light shielding layer 7 can be appropriately set according to, for example, the light transmittance, mechanical strength, or thermal expansion coefficient of the inorganic light shielding layer 7 .
- the inorganic light shielding layer 7 usually has a thermal expansion coefficient different from that of the glass substrate 2 . Therefore, the inorganic light shielding layer 7 may be damaged by repeated heating and cooling.
- the thickness of the inorganic light shielding layer 7 is preferably thin.
- the thickness of the inorganic light shielding layer 7 is preferably 1 ⁇ m or more, more preferably 2 ⁇ m or more, preferably 20 ⁇ m or less, and more preferably 15 ⁇ m or less.
- the method of manufacturing the cooker top plate 1B is also not particularly limited, and it can be manufactured by the same method as in the first and second embodiments except that the inorganic light shielding layer 7 is formed.
- the method for forming the inorganic light shielding layer 7 is not particularly limited.
- the inorganic light shielding layer 7 can be formed, for example, by the following method.
- a solvent is added to the mixed powder of the coloring pigment and the glass powder to form a paste.
- the obtained paste is applied onto the rear surface 2b of the glass substrate 2 by a screen printing method or the like, and dried.
- the inorganic light shielding layer 7 can be formed by firing.
- the firing temperature and firing time can be appropriately set according to the composition of the glass powder used.
- the firing temperature can be, for example, about 200.degree. C. to 900.degree.
- the baking time can be, for example, about 10 minutes to 1 hour.
- the inorganic light shielding layer 7 is a metal layer
- the inorganic light shielding layer 7 can be formed by a sputtering method, a CVD method, or the like.
- the single-layer heat-resistant resin layer 3B is provided on the inorganic light-shielding layer 7, but a heat-resistant resin layer having a structure of two or more layers is provided on the inorganic light-shielding layer 7.
- FIG. 4 is a schematic cross-sectional view showing a cooker top plate according to a fourth embodiment of the present invention.
- a cooker top plate 1C shown in FIG. 4 includes a glass substrate 2 and a heat-resistant resin layer 3C.
- Cooker top plate 1C shown in FIG. 4 differs from cooker top plate 1 shown in FIG. 1 in the configuration of the heat-resistant resin layer. That is, in the cooker top plate 1 shown in FIG. 1, each layer (the first layer 4 and the second layer 5) constituting the heat-resistant resin layer 3 is the layer (X), whereas in FIG. In the cooker top plate 1C shown, the heat-resistant resin layer 3C has a layer (X) and a layer (Y).
- the heat-resistant resin layer 3C is arranged on the back surface 2b of the glass substrate 2.
- the heat-resistant resin layer 3C has a two-layer structure. That is, the heat-resistant resin layer 3C has a first layer 4C and a second layer 5C arranged on the surface of the first layer 4C opposite to the glass substrate 2 side.
- the first layer 4C is a surface layer on the glass substrate 2 side of the heat-resistant resin layer 3C.
- the second layer 5C is a surface layer of the heat-resistant resin layer 3C on the side opposite to the glass substrate 2 side.
- the first layer 4C and the second layer 5C each contain a silicone resin and a pigment.
- the first layer 4C is the layer (Y).
- the second layer 5C is a layer (X) containing a scale-like pigment (A) and a needle-like crystal pigment (B).
- the silicone resin the scale-like pigment (A), and the needle-like crystal pigment (B), those described in the first embodiment can be appropriately used.
- the heat-resistant resin layer 3C may contain a coloring pigment or the like as in the first embodiment. For example, by including a color pigment in the first layer 4C, it is possible to increase the variety of colors that can be imparted to the heat-resistant resin layer 3C.
- the heat-resistant resin layer 3C includes the specific layer (X), the scratch resistance and adhesion of the heat-resistant resin layer 3C can be enhanced.
- the details of the glass substrate 2, the silicone resin, the scale-like pigment (A), the needle-like crystal pigment (B), and other components are as described in the first embodiment, so the description is omitted.
- the preferred ranges of the contents of the silicone resin, the scale-like pigment (A), and the needle-like crystal pigment (B) in the heat-resistant resin layer 3C, the layer (X), and the layer (Y), and the mass of the heat-resistant resin layer 3C The preferred form of the heat-resistant resin layer 3C, such as the preferred range of the ratio (content of the scale-like pigment (A)/content of the needle-like crystal pigment (B)), is the heat-resistant resin layer 3, It is the same as the preferred form of layer (X) and layer (Y).
- FIG. 5 is a schematic cross-sectional view showing a cooker top plate according to a fifth embodiment of the present invention.
- a cooker top plate 1D shown in FIG. 5 includes a glass substrate 2 and a heat-resistant resin layer 3D.
- Cooker top plate 1D shown in FIG. 5 differs from cooker top plate 1 shown in FIG. 1 in the structure of the heat-resistant resin layer. That is, the cooker top plate 1 shown in FIG. 1 is provided with the heat-resistant resin layer 3 having a two-layer structure, whereas the cooker top plate 1D shown in FIG. 5 has a three-layer structure.
- a heat-resistant resin layer 3D is provided.
- the heat-resistant resin layer 3D is arranged on the back surface 2b of the glass substrate 2.
- the heat-resistant resin layer 3D has a three-layer structure. That is, the heat-resistant resin layer 3D includes the first layer 4D, the second layer 5D arranged on the surface of the first layer 4D opposite to the glass substrate 2 side, and the second layer 5D of the second layer 5D. and a third layer 6D disposed on the surface opposite to the layer 4D side of the first layer.
- the first layer 4D is a surface layer on the glass substrate 2 side of the heat-resistant resin layer 3D.
- the third layer 6D is the surface layer of the heat-resistant resin layer 3D on the side opposite to the glass substrate 2 side.
- the first layer 4D, the second layer 5D and the third layer 6D each contain a silicone resin and a pigment.
- the second layer 5D is the layer (X) containing the scale-like pigment (A) and the needle-like crystal pigment (B).
- Each of the first layer 4D and the third layer 6D is a layer (Y).
- the heat-resistant resin layer 3D includes the specific layer (X), so the scratch resistance and adhesion of the heat-resistant resin layer 3D can be enhanced.
- the third layer 6D is provided on the surface of the second layer 5D, which is the layer (X). In addition to the effects of scratch resistance and adhesion, the third layer 6D can also exhibit stain prevention effects.
- the third layer 6D is preferably the layer (X).
- the details of the glass substrate 2, the silicone resin, the scale-like pigment (A), the needle-like crystal pigment (B), and other components are as described in the first embodiment, so the description is omitted.
- the preferred ranges of the contents of the silicone resin, the scale-like pigment (A), and the needle-like crystal pigment (B) in the heat-resistant resin layer 3D, the layer (X), and the layer (Y), and the mass of the heat-resistant resin layer 3D The preferred form of the heat-resistant resin layer 3D, such as the preferred range of the ratio (content of the scale-like pigment (A)/content of the needle-like crystal pigment (B)), is the heat-resistant resin layer 3 described in the first embodiment, It is the same as the preferred form of layer (X) and layer (Y).
- the thickness of the third layer 6D is preferably 5 ⁇ m or more, more preferably 8 ⁇ m or more, preferably 50 ⁇ m or less, more preferably 30 ⁇ m or less.
- the thickness is within the above range, peeling of the heat-resistant resin layer 3D due to repeated heating and cooling can be more effectively prevented, and the stain prevention effect can be further enhanced.
- the heat-resistant resin layer may have a one-layer structure, a two-layer structure, or a two-layer or more structure. , may have a three-layer structure, or may have a structure of three or more layers.
- the heat-resistant resin layer when the heat-resistant resin layer has a one-layer structure, the heat-resistant resin layer is the layer (X).
- the heat-resistant resin layer when the heat-resistant resin layer has a structure of two or more layers, at least one of the heat-resistant resin layers is the layer (X).
- the heat-resistant resin layer may have only one layer of the layer (X), or may have two or more layers, and the heat-resistant resin layer may be layer (X).
- the heat-resistant resin layer when the heat-resistant resin layer has a structure of two or more layers, the heat-resistant resin layer may have a layer (X) and a layer (Y).
- the surface layer of the heat-resistant resin layer on the side opposite to the glass substrate side is a layer It is preferably (X), and more preferably all layers of the heat-resistant resin layer are layers (X).
- the surface layer on the glass substrate side of the heat-resistant resin layer preferably contains a coloring pigment.
- the surface layer of the heat-resistant resin layer on the side of the glass substrate may be the layer (X) or the layer (Y).
- the surface layer of the heat-resistant resin layer on the side opposite to the glass substrate side is the layer (X). Moreover, it is preferable that the surface layer of the heat-resistant resin layer on the side of the glass substrate is the layer (Y).
- Transparent crystallized glass plate (“N-0” manufactured by Nippon Electric Glass Co., Ltd., average linear thermal expansion coefficient at 30 ° C. to 750 ° C.: 0.5 ⁇ 10 -7 / ° C., thickness: 4 mm)
- the following materials for the heat-resistant resin layer were prepared.
- ⁇ Silicone resin component > Methylphenyl silicone resin (“TSR-145” manufactured by Momentive, containing 40% by mass of solvents (xylene and toluene) in commercial products) Polyfunctional silicone oligomer
- cooker top plates provided with a heat-resistant resin layer having a single-layer structure were produced as follows.
- the shape, type and content of the pigment in the heat-resistant resin layer can be confirmed by using a known method.
- the shape of the pigment in the heat-resistant resin layer can be determined by cutting the top plate, polishing the cross section, and using a scanning electron microscope (JSM-IT700HR, etc.) to examine the cross section of the polished heat-resistant resin layer at a magnification of about 200. This can be confirmed by observation at a magnification of ⁇ 3000.
- the type of pigment in the heat-resistant resin layer can be determined by qualitatively analyzing the elements in the range in which the pigment exists after observing the shape of the pigment with the scanning electron microscope, and guessing from the constituent elements. can be done.
- the content of each pigment in the heat-resistant resin layer can be determined by quantitative analysis simultaneously with the qualitative analysis of the above elements.
- Example 1 A paste was prepared by mixing a methylphenyl silicone resin (TSR-145), a polyfunctional silicone oligomer, aluminum flakes, mica, potassium titanate, and xylene. Table 1 shows the content of each component in 100% by mass of the resulting paste excluding the solvent (wherein the content of the methylphenyl silicone resin in Table 1 is the content of the commercially available product).
- solvent as used herein is a general term for substances that have the property of dissolving or diluting other components and that hardly remain in the coating film after drying.
- organic solvents include second-class organic solvents listed in Appended Table 6-2 of the Ordinance for Enforcement of the Organic Solvents Industrial Safety and Health Law.
- the obtained paste was screen-printed on the surface of the glass substrate so that the coating thickness was 15 ⁇ m. Then, heat drying was performed at 300° C. for 10 minutes. In this way, a top plate for a cooker was obtained in which a heat-resistant resin layer having a one-layer structure was arranged on the surface of the glass substrate.
- Examples 2-5 and Comparative Examples 1-6 A cooker top plate was produced in the same manner as in Example 1, except that the composition of each component in 100% by mass of the paste excluding the solvent was changed as shown in Tables 1 and 2.
- a top plate for cooker having a heat-resistant resin layer having a structure of two or more layers was produced as follows.
- Pastes BK-1, BK-2, BK-3, SI-1, RB-1 were prepared by mixing the components listed in Table 3 below. Table 3 shows the content of each component in 100% by mass excluding the solvent in each paste (wherein the content of methylphenyl silicone resin in Table 3 is the content of the commercially available product).
- Paste BK-1 was used as the first layer forming paste in the heat-resistant resin layer
- paste SI-1 was used as the second layer forming paste.
- the first layer forming paste was screen-printed on the surface of the glass substrate so as to have a coating thickness of 15 ⁇ m. Then, heat drying was performed at 300° C. for 10 minutes to form a first layer.
- the second layer forming paste was screen-printed on the surface of the first layer so as to have a coating thickness of 15 ⁇ m. Then, heat drying was performed at 300° C. for 10 minutes to form a second layer.
- a cooker top plate having a two-layer heat-resistant resin layer on the surface of the glass substrate was produced.
- Example 7 A cooker top plate was produced in the same manner as in Example 6, except that the paste type was changed as shown in Table 4.
- Paste BK-1 is used as the first layer forming paste in the heat-resistant resin layer
- paste SI-1 is used as the second layer forming paste
- paste BK-1 is used as the third layer forming paste.
- the first layer forming paste was screen-printed on the surface of the glass substrate so as to have a coating thickness of 15 ⁇ m. Then, heat drying was performed at 300° C. for 10 minutes to form a first layer.
- the second layer forming paste was screen-printed on the surface of the first layer so as to have a coating thickness of 15 ⁇ m. Then, heat drying was performed at 300° C. for 10 minutes to form a second layer.
- the third layer-forming paste was screen-printed on the surface of the second layer so as to have a coating thickness of 15 ⁇ m. Then, heat drying was performed at 300° C. for 10 minutes to form a third layer. Thus, a cooker top plate having a three-layered heat-resistant resin layer on the surface of the glass substrate was produced.
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Abstract
Description
図1は、本発明の第1の実施形態に係る調理器用トッププレートを示す模式的断面図である。
(2X)顔料100質量%中、鱗片状顔料(A)と針状結晶顔料(B)との合計含有量が、85質量%以上である。
(3X)鱗片状顔料(A)の含有量の、針状結晶顔料(B)の含有量に対する質量比(鱗片状顔料(A)の含有量/針状結晶顔料(B)の含有量)が、1.0以上、35.0以下である。
(2Y)顔料100質量%中、モース硬度が2.5以上である鱗片状顔料とモース硬度が2.5以上である針状結晶顔料との合計含有量が、85質量%以上である。
(3Y)モース硬度が2.5以上である鱗片状顔料の含有量の、モース硬度が2.5以上である針状結晶顔料の含有量に対する質量比(モース硬度が2.5以上である鱗片状顔料の含有量/モース硬度が2.5以上である針状結晶顔料の含有量)が、1.0以上、35.0以下である。
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であることが好ましい。ガラス基板2は透明ガラス基板であることが好ましい。ガラス基板2は、有色透明であってもよいが、調理器用トッププレート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、ガラス基板における「透明」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。
耐熱樹脂層3は、ガラス基板2の裏面2b上に配置されている。耐熱樹脂層3は、2層構造を有する。すなわち、耐熱樹脂層3は、第1の層4と、第1の層4のガラス基板2側とは反対側の表面上に配置された第2の層5とを有する。なお、第1の層4及び第2の層5は、互いに異なる色に着色されていることが好ましい。例えば、第1の層4を白色の層とし、第2の層5をグレー色の層とすることができる。もっとも、第1の層4及び第2の層5の色は、特に限定されず、意匠性や、調理器の内部構造の隠蔽性を考慮して、適宜、決定することができる。
層(X)は、シリコーン樹脂を含む。耐熱樹脂層3は、シリコーン樹脂を含む。シリコーン樹脂として、調理器用トッププレートの耐熱樹脂層に用いられている従来公知のシリコーン樹脂を使用可能である。層(Y)、第1の層4及び第2の層5はそれぞれ、シリコーン樹脂を含むことが好ましい。耐熱樹脂層3が2層以上の構造を有する場合に、耐熱樹脂層3の全ての層が、シリコーン樹脂を含むことが好ましい。上記シリコーン樹脂は、1種のみが用いられてもよく、2種以上が併用されてもよい。耐熱樹脂層3の各層に含まれるシリコーン樹脂はそれぞれ、同一であってもよく、異なっていてもよい。
層(X)は、顔料を含み、該顔料が、鱗片状顔料(A)と、針状結晶顔料(B)とを含む。耐熱樹脂層3は、顔料を含み、該顔料が、鱗片状顔料(A)と、針状結晶顔料(B)とを含む。なお、層(Y)は、顔料を含んでいてもよく、顔料を含んでいなくてもよい。
鱗片状顔料(A)は、モース硬度が2.5以上の鱗片状顔料である。耐熱樹脂層3は、鱗片状顔料(A)を含む。なお、本発明においては、耐熱樹脂層3が、鱗片状顔料(A)を含む層(X)を有していればよい。もっとも、本発明の効果をより一層効果的に発揮させる観点からは、耐熱樹脂層3が2層以上の構造を有する場合に、耐熱樹脂層3の全ての層が、鱗片状顔料(A)を含むことが好ましい。したがって、第1の層4及び第2の層5はそれぞれ、鱗片状顔料(A)を含むことが好ましい。なお、層(Y)は、鱗片状顔料(A)を含んでいてもよく、鱗片状顔料(A)を含んでいなくてもよい。鱗片状顔料(A)は、1種のみが用いられてもよく、2種以上が併用されてもよい。耐熱樹脂層3の各層に含まれる鱗片状顔料(A)はそれぞれ、同一であってもよく、異なっていてもよい。
針状結晶顔料(B)は、モース硬度が2.5以上の針状結晶顔料である。耐熱樹脂層3は、針状結晶顔料(B)を含む。なお、本発明においては、耐熱樹脂層3が、針状結晶顔料(B)を含む層(X)を有していればよい。もっとも、本発明の効果をより一層効果的に発揮させる観点からは、耐熱樹脂層3が2層以上の構造を有する場合に、耐熱樹脂層3の全ての層が、針状結晶顔料(B)を含むことが好ましい。したがって、第1の層4及び第2の層5はそれぞれ、針状結晶顔料(B)を含むことが好ましい。なお、層(Y)は、針状結晶顔料(B)を含んでいてもよく、針状結晶顔料(B)を含んでいなくてもよい。針状結晶顔料(B)は、1種のみが用いられてもよく、2種以上が併用されてもよい。耐熱樹脂層3の各層に含まれる針状結晶顔料(B)はそれぞれ、同一であってもよく、異なっていてもよい。
層(X)、層(Y)、耐熱樹脂層3、第1の層4及び第2の層5はそれぞれ、鱗片状顔料(A)及び針状結晶顔料(B)の双方とは異なる顔料を含んでいてもよい。該顔料としては、着色顔料等が挙げられる。耐熱樹脂層3が着色顔料を含む場合、第1の層4が、第1の着色顔料を含んでおり、第2の層5が、第1の着色顔料とは異なる第2の着色顔料を含んでいてもよい。この場合、意匠性や、調理器内部の隠蔽性を考慮して、適宜の着色顔料の組み合わせを選定することができる。上記着色顔料は、1種のみが用いられてもよく、2種以上が併用されてもよい。
調理器用トッププレート1の製造方法の一例では、まず、シリコーン樹脂成分と、鱗片状顔料(A)と、針状結晶顔料(B)とを含むペーストを用意する。上記ペーストは、着色顔料、硬化触媒、架橋剤、溶媒、粘性調整剤、レベリング剤及び消泡剤等の他の成分を含んでいてもよい。本実施形態では、第1の層形成用ペースト及び第2の層形成用ペーストをそれぞれ別々に用意する。なお、溶媒としては、特に限定されないが、例えば、キシレンを用いることができる。
図2は、本発明の第2の実施形態に係る調理器用トッププレートを示す模式的断面図である。
図3は、本発明の第3の実施形態に係る調理器用トッププレートを示す模式的断面図である。
図4は、本発明の第4の実施形態に係る調理器用トッププレートを示す模式的断面図である。
図5は、本発明の第5の実施形態に係る調理器用トッププレートを示す模式的断面図である。
メチルフェニルシリコーン樹脂(モメンティブ社製「TSR-145」、市販品中に溶剤(キシレン及びトルエン)を40質量%含む)
多官能シリコーンオリゴマー
アルミニウムフレーク(モース硬度2.8、金属顔料)
マイカ(モース硬度2.8、体質顔料)
チタン酸カリウム(モース硬度4、大塚化学社製「ティスモD」)
黒顔料(球状顔料)
赤茶顔料(球状顔料)
タルク(モース硬度1、鱗片状顔料)
キシレン
メチルフェニルシリコーン樹脂(TSR-145)と、多官能シリコーンオリゴマーと、アルミニウムフレークと、マイカと、チタン酸カリウムと、キシレンとをそれぞれ混合してペーストを作製した。得られたペーストにおける溶剤を除く成分100質量%中の各成分の含有量を表1に示す(ただし、表1中、メチルフェニルシリコーン樹脂の含有量は市販品の含有量である)。なお、本明細書において溶剤とは、他の成分を溶かしたり、希釈したりする性質を有し、かつ乾燥後の塗膜中に残存しにくい物質の総称である。例えば、有機溶剤としては、有機溶剤労働安全衛生法施行令別表第六の二に掲げる第二種有機溶剤が挙げられる。
ペーストにおける溶剤を除く成分100質量%中の各成分の配合組成を表1,2のように変更したこと以外は、実施例1と同様にして、調理器用トッププレートを作製した。
下記の表3に記載の成分を混合することにより、ペーストBK-1,BK-2,BK-3,SI-1,RB-1を作製した。各ペーストにおける溶剤を除く成分100質量%中の各成分の含有量を表3に示す(ただし、表3中、メチルフェニルシリコーン樹脂の含有量は市販品の含有量である)。
耐熱樹脂層における第1の層形成用ペーストとして、ペーストBK-1を用い、第2の層形成用ペーストとして、ペーストSI-1を用いた。第1の層形成用ペーストを、ガラス基板の表面上に塗布厚みが15μmとなるように、スクリーン印刷した。次いで、300℃で10分間の条件で加熱乾燥を行い、第1の層を形成した。次いで、第2の層形成用ペーストを、第1の層の表面上に塗布厚みが15μmとなるように、スクリーン印刷した。次いで、300℃で10分間の条件で加熱乾燥を行い、第2の層を形成した。このようにして、ガラス基板の表面上に2層構造の耐熱樹脂層を備える調理器用トッププレートを作製した。
ペーストの種類を表4のように変更したこと以外は、実施例6と同様にして、調理器用トッププレートを作製した。
耐熱樹脂層における第1の層形成用ペーストとして、ペーストBK-1を用い、第2の層形成用ペーストとして、ペーストSI-1を用い、第3の層形成用ペーストとして、ペーストBK-1を用いた。第1の層形成用ペーストを、ガラス基板の表面上に塗布厚みが15μmとなるように、スクリーン印刷した。次いで、300℃で10分間の条件で加熱乾燥を行い、第1の層を形成した。次いで、第2の層形成用ペーストを、第1の層の表面上に塗布厚みが15μmとなるように、スクリーン印刷した。次いで、300℃で10分間の条件で加熱乾燥を行い、第2の層を形成した。次いで、第3の層形成用ペーストを、第2の層の表面上に塗布厚みが15μmとなるように、スクリーン印刷した。次いで、300℃で10分間の条件で加熱乾燥を行い、第3の層を形成した。このようにして、ガラス基板の表面上に3層構造の耐熱樹脂層を備える調理器用トッププレートを作製した。
(1)調理器用トッププレートの外観色
調理器用トッププレートをガラス基板側から目視したときの外観色を確認した。
得られた調理器用トッププレートにおける耐熱樹脂層の鉛筆硬度を、JIS K5600-5-4(1999年)に準拠して評価した。
得られた調理器用トッププレートにおける耐熱樹脂層の鉛筆硬度を、JIS K5600-5-4(1999年)に準拠して評価したのちに、調理器用トッププレートをガラス基板側から目視した。この際、耐熱樹脂層の傷がガラス基板側から視認されるか否かを確認した。また、傷が視認されない場合、試験に用いる鉛筆の硬度を更に大きくし、耐熱樹脂層の傷がガラス基板側から視認されるか否かを確認した。耐熱樹脂層の傷がガラス基板側から視認されない硬度のうち、最も大きな硬度を「ガラス基板側から視認される傷が発生しない硬度」とした。
得られた調理器用トッププレートを、95℃の沸騰水に2時間浸漬させた。浸漬後、耐熱樹脂層にカッターナイフにて1mm間隔で縦横11本の切れ込みを入れた。形成された100個の碁盤目状の切れ込み表面にテープを貼った。このテープを剥がして、剥離の状態を確認した。
○:耐熱樹脂層がガラス基板から剥離していない
△:耐熱樹脂層がガラス基板から剥離していないが、耐熱樹脂層の表面に剥離が認められる
×:耐熱樹脂層がガラス基板から剥離し、ガラス基板の表面の露出が認められる
2…ガラス基板
2a…調理面
2b…裏面
3,3A,3B,3C,3D…耐熱樹脂層
4,4C,4D…第1の層
5,5C,5D…第2の層
6D…第3の層
7…無機遮光層
Claims (10)
- 調理器具が載せられる調理面及び該調理面とは反対側の裏面を有する、ガラス基板と、
前記ガラス基板の前記裏面上に配置されている、耐熱樹脂層と、
を備え、
前記耐熱樹脂層が、シリコーン樹脂と、顔料とを含む層(X)を有し、
前記層(X)中の前記顔料が、モース硬度が2.5以上である鱗片状顔料(A)と、モース硬度が2.5以上である針状結晶顔料(B)とを含み、
前記層(X)において、前記顔料100質量%中、前記鱗片状顔料(A)と前記針状結晶顔料(B)との合計含有量が、85質量%以上であり、
前記層(X)において、前記鱗片状顔料(A)の含有量の、前記針状結晶顔料(B)の含有量に対する質量比(鱗片状顔料(A)の含有量/針状結晶顔料(B)の含有量)が、1.0以上、35.0以下である、調理器用トッププレート。 - 前記層(X)中の前記鱗片状顔料(A)が、金属顔料(A1)と、金属顔料とは異なる体質顔料(A2)とのうちの少なくとも一方を含む、請求項1に記載の調理器用トッププレート。
- 前記層(X)中の前記金属顔料(A1)が、アルミニウムと、アルミニウム化合物とのうちの少なくとも一方を含む、請求項2に記載の調理器用トッププレート。
- 前記層(X)100質量%中、前記金属顔料(A1)の含有量が、10質量%以上、55質量%以下である、請求項2又は3に記載の調理器用トッププレート。
- 前記層(X)中の前記体質顔料(A2)が、マイカを含む、請求項2又は3に記載の調理器用トッププレート。
- 前記層(X)中の前記針状結晶顔料(B)が、チタン酸カリウム、ケイ酸カルシウム、及び酸化チタンからなる群から選択される少なくとも1種を含む、請求項1~3のいずれか1項に記載の調理器用トッププレート。
- 前記層(X)中の前記針状結晶顔料(B)が、チタン酸カリウムを含む、請求項1~3のいずれか1項に記載の調理器用トッププレート。
- 前記耐熱樹脂層が、前記層(X)のみの1層の構造を有する、請求項1~3のいずれか1項に記載の調理器用トッププレート。
- 前記耐熱樹脂層が、2層以上の構造を有する、請求項1~3のいずれか1項に記載の調理器用トッププレート。
- 前記耐熱樹脂層における前記ガラス基板側とは反対側の表面層が、前記層(X)である、請求項9に記載の調理器用トッププレート。
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