Classifications

• • C—CHEMISTRY; METALLURGY
  • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
  • C23D—ENAMELLING OF, OR APPLYING A VITREOUS LAYER TO, METALS
  • C23D5/00—Coating with enamels or vitreous layers
  • C23D5/06—Coating with enamels or vitreous layers producing designs or letters

Definitions

• the present invention relates to a metal cooking utensil covered at least partially by a layer of enamel.
• Enamel coatings on metal cooking utensils have different purposes, such as anti-corrosion, color fastness to light, abrasion resistance, chemical resistance, thermal resistance, but also and above all particularly on metals such as aluminum, a decorative purpose.
• the science of the enameler or enamel fryer slip formulator consists in obtaining the most stable color formula during vitrification, the most covering and the most reproducible from one series to another with the best quality ratio. -price.
• the present invention proposes to the enameller, in particular on aluminum, to have a coating with a transparent color making it possible to appreciate the surface texture of the metal and to give an innovative concept of "material” and no longer of coating on the material (such as varnish on wood preserving the wood side compared to painted or lacquered wood).
• the aluminum cooking utensil covered at least partially by an enamel layer is characterized in that the enamel layer is devoid of or lightly charged with coloring pigments so as to be sufficiently transparent in order to allow the surface texture of the underlying metal to be perceived.
• the transparent enamel layer reveals the surface texture of the metal, that is to say the traces limiting the grain boundaries resulting from a chemical attack, the roughness obtained after a surface treatment, the surface condition obtained after EDM or other chemical or physical treatment.
• This new concept also makes it possible to use rapid and economical turbine or flow coating application methods.
• the enamel layer is obtained from an enamel frit devoid of coloring pigment.
• the transparent shade obtained will change according to the nature of the enamel.
• vanadic enamels will color the surface yellow: ex. : GL 4317 from FERRO or AT 6118 from BAYER.
• the enamel layer is obtained from an enamel frit slip containing a very small proportion of coloring pigments in order to obtain a colored but transparent enamel layer.
• This second solution therefore consists, for coloring the enamel, of using a very small percentage of mineral pigments in order to obtain transparency, but it has the disadvantage of being very sensitive to the different thicknesses.
• the enamel layer is obtained from an enamel frit slip containing an enamel frit colored by means of a pigment, diluted in an enamel frit devoid of pigment.
• This third solution therefore consists in using fusion colors cut or not with transparent enamels.
• the enamel layer is obtained from an enamel frit slip containing less than 3% by weight of coloring pigment.
• a colored pigment with very little coverage is used, such as transparent iron oxide of the Cappel type.
• the culinary utensil comprises several layers of transparent enamel more or less charged with pigments of different colors.
• This combination of several transparent layers of different colors can provide a reinforced decorative effect while revealing the surface structure of the underlying metal.
• compositions of enamel frit slurries which can be used in the context of the present invention.
• Example 1 GL 4317 frit 100 Boric acid 4 Soda metasilicate 1 Caustic potash 1 Water 56
• Example 2 Fritte GL 4317 100 Boric acid 4 Soda metasilicate 1 Caustic potash 1 Mineral pigments 0, 1 to 3 Water 56
• Example 3 Fritte AL 288 5 Fritte GL 4317 95 Boric acid 4 Soda metasilicate 1 Caustic potash 1 Water 56
• Example 4 Fritte GL 4317 100 Boric acid 4 Soda metasilicate 1 Caustic potash 1 Iron oxide Cappel 2 Water 56
• the layer thus pulverized is then baked in the oven at a temperature between 500 and 600 ° C.

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• Chemical & Material Sciences (AREA)
• Engineering & Computer Science (AREA)
• Materials Engineering (AREA)
• Mechanical Engineering (AREA)
• Metallurgy (AREA)
• Organic Chemistry (AREA)
• Glass Compositions (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=9488378

Family Applications (1)

Country Status (3)

Cited By (3)

Citations (3)

• 1996
  • 1996-01-23 FR FR9600745A patent/FR2743820B1/fr not_active Expired - Fee Related
• 1997
  • 1997-01-16 EP EP97400090A patent/EP0786538A1/de not_active Withdrawn
  • 1997-01-23 CA CA002195832A patent/CA2195832A1/en not_active Abandoned

Patent Citations (3)

Non-Patent Citations (1)

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