JP2005207605A - Window material for cooker - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a window material for cooker through which an inside condition is observed in details without imaging surrounding scenes and lights. <P>SOLUTION: The window material for cooker comprises a visible ray reflection preventing film formed on the surface of a transparent substrate. The transparent substrate is a glass or a resin. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a window material for a cooker used for a cooker such as a microwave oven, a grilled fish, and an oven toaster.

A cooking device such as a microwave oven, a grilled fish, and an oven toaster is provided with a window for observing the inside. For example, the window material of a microwave oven consists of a glass plate and punching metal (for example, refer patent document 1), and the glass plate is used for the window material of a grilled fish grill (for example, refer patent document 2).
Japanese Utility Model Publication No. 5-38799 JP-A-5-285052

  However, the window materials for cooking appliances disclosed in Patent Documents 1 and 2 have a problem in that it is difficult to observe the inside state in detail because the surrounding scenery or illumination is reflected on the surface.

  The objective of this invention is providing the window material for cookers which does not have reflection of surrounding scenery, illuminations, etc., and can observe an internal state in detail.

  The window material for a cooking appliance of the present invention is characterized in that a visible light antireflection film is formed on the surface of a transparent substrate.

  Since the window material for a cooking appliance of the present invention is formed with a visible light antireflection film on the surface of the transparent substrate, there is no reflection of surrounding scenery or lighting on the window material, and the visible light transmittance is low. It becomes taller and the inside can be observed in detail.

  When the window material for a cooking device of the present invention has one or more transparent substrates, a plurality of transparent substrates may be laminated to form a single transparent plate, or may be arranged in parallel by providing a space. A laminated glass structure in which a resin plate is provided between the glass plates is preferable because fragments are not scattered even if the transparent substrate is damaged by thermal shock or the like.

  The window material for a cooking appliance of the present invention can use a silicon dioxide fine particle film, a metal oxide film, a magnesium fluoride film, a magnesium fluoride-alumina laminated film, a silicon dioxide-titanium dioxide laminated film, etc. as an antireflection film for visible light. It is.

  The antireflection film for visible light can be formed by spin coating, chemical vapor deposition (CVD), sputtering, or the like.

  It is preferable that the window material for a cooking appliance of the present invention is formed with an antireflection film for visible light on the outer side of the outermost transparent substrate because the effect of preventing reflection is excellent.

  When the transparent substrate is made of glass or resin, the window material for a cooker of the present invention is preferable because it has high transparency and thus allows easy observation of the internal state in detail, and is excellent in processing and moldability. In particular, glass is preferable because it does not color or deform over time.

  As the glass, commonly used glass such as soda lime glass and borosilicate glass can be used, but low expansion transparent crystallized glass, quartz glass, and aluminoborosilicate glass are preferable because of excellent heat resistance. .

  As the resin, highly transparent polystyrene resin, polycarbonate resin, acrylic resin, PET resin and the like can be used, but PEEK resin, PTFE resin, PFA resin, FEP resin, CGV resin and the like are excellent in heat resistance. preferable. In addition, when the transparent substrate which consists of resin is used for the exterior side rather than the interior side of the cooker which becomes high temperature, a deformation | transformation, coloring, etc. by a heat | fever can be suppressed.

  When the conductive mesh is inserted into at least one place between the plurality of transparent substrates, the window material for a cooker of the present invention can shield electromagnetic waves and is suitable for a window material for a microwave oven.

  The conductive mesh is sandwiched between two transparent substrates, adhered to the inner surface of one of the two transparent substrates via an adhesive, and positioned between the two transparent substrates. And it arrange | positions by fixing an edge part with a window frame.

  When the conductive mesh is sandwiched between two transparent substrates, there is no need to use an adhesive between the glass plate and the resin plate when the conductive mesh is sandwiched between the resin plates and thermocompression bonded. This is preferable because the conductive mesh is less likely to be wrinkled.

  Conductive mesh is produced by electroforming method from carbon fiber mesh, metal plating mesh obtained by electroless plating of mesh made of polyester fiber, metal foil mesh patterned by photoresist-etching of metal foil, and patterned electrode The metal foil mesh etc. which were made can be used.

  Gold, silver, copper, or nickel can be used as a metal used as metal plating or metal foil. In addition, these metals have high conductivity and high chemical stability, so that they are not easily corroded and can maintain high electromagnetic wave shielding ability over a long period of time.

  Further, when the surface of the metal plating mesh or metal foil mesh is treated with hydrogen sulfide or applied with a black paint, glare on the mesh surface is suppressed, so that the inside can be easily observed.

  The mesh pattern of the metal foil may be a lattice shape, a honeycomb shape, a ladder shape, or an inverted polka dot pattern.

  The line width of the conductive mesh is preferably 2 to 40 μm. If it is thinner than 2 μm, the electric resistance increases and the electromagnetic wave shielding ability decreases. Moreover, when it is thicker than 40 micrometers, it will become obstructive when observing an internal mode. A preferable range of the line width of the conductive mesh is 4 to 35 μm, and a more preferable range is 5 to 33 μm.

  The opening ratio of the conductive mesh is preferably 70 to 93%. If the opening ratio of the conductive mesh is less than 70%, the inside may not be sufficiently observed, and if it is greater than 93%, the electromagnetic wave may not be sufficiently shielded. A preferable range of the opening ratio of the conductive mesh is 73 to 90%, and a more preferable range is 75 to 88%.

  When the window material for a cooking device of the present invention has a transparent heat ray reflective film formed on the surface of at least one transparent substrate, the thermal efficiency of the cooking device is improved and the window material is not easily heated, so that burns can be prevented. In addition, it has an electromagnetic shielding effect.

  As the transparent heat ray reflective film, a transparent metal oxide film such as a tin-containing indium oxide (ITO) film, an aluminum-containing zinc oxide film, a tin-containing antimony oxide film, a fluorine-containing tin oxide film, or an antimony-containing tin oxide film, or gold Metal thin films such as silver, copper, and aluminum are suitable.

  The window material for cooking appliances of the present invention will be described in detail with reference to examples.

Drawing 1 is a sectional view showing the window material for cooking appliances of an example.
[Example]
As shown in FIG. 1, the cooker window material 1 includes two glass plates 2 and 3 that are transparent substrates, resin plates 4 and 4 made of PET resin, an antireflection film 5, and a conductive mesh 6. .

  The glass plates 2 and 3 are made of aluminoborosilicate glass and have a thickness of 0.8 mm. The conductive mesh 6 is patterned into a lattice shape having a line width of 30 μm by subjecting copper foil to a photoresist-etching process. This is a mesh in which a black paint is applied to the surface of a copper foil (thickness 50 μm), and the aperture ratio is 83%.

  The conductive mesh 6 sandwiched between the resin plates 4 and 4 has a laminated glass structure sandwiched between the glass plate 2 and the glass plate 3. The antireflection film 5 is a silicon dioxide-titanium dioxide four-layer laminate film formed by sputtering and having a thickness of 100 nm, and the resin plate 4 of the glass plate 2 in which the silicon dioxide film is the outermost transparent substrate. It is formed on the non-contact surface 2a.

  As described above, the window material for a cooker according to the present invention has no reflection of surrounding scenery, lighting, etc., and the inside can be observed in detail, so that the window of a cooker such as a microwave oven, fish grill, oven toaster, etc. Suitable for materials.

It is sectional drawing which shows the window material for cookers of an Example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Window material for cookers 2, 3 Glass plate 2a Surface 4 Resin plate 5 Antireflection film 6 Conductive mesh

Claims (3)

  A window material for a cooking appliance, wherein an antireflection film for visible light is formed on a surface of a transparent substrate.   The window material for cooking appliances according to claim 1, wherein the transparent substrate is made of glass or resin.   It is a window material for cooking appliances using a some transparent substrate, Comprising: A conductive mesh is inserted in at least one place between several transparent substrates, The Claim 1 or 2 characterized by the above-mentioned. Window material for cookware.

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