EP2505688B1 - Procédé de décoration pour un récipient de cuisson - Google Patents

Procédé de décoration pour un récipient de cuisson Download PDF

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Publication number
EP2505688B1
EP2505688B1 EP20120158143 EP12158143A EP2505688B1 EP 2505688 B1 EP2505688 B1 EP 2505688B1 EP 20120158143 EP20120158143 EP 20120158143 EP 12158143 A EP12158143 A EP 12158143A EP 2505688 B1 EP2505688 B1 EP 2505688B1
Authority
EP
European Patent Office
Prior art keywords
cooking vessel
pigmentation
sol
coating
application
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Not-in-force
Application number
EP20120158143
Other languages
German (de)
English (en)
Other versions
EP2505688A1 (fr
Inventor
Michele Montagna
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Alluflon SpA
Original Assignee
Alluflon SpA
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Filing date
Publication date
Application filed by Alluflon SpA filed Critical Alluflon SpA
Publication of EP2505688A1 publication Critical patent/EP2505688A1/fr
Application granted granted Critical
Publication of EP2505688B1 publication Critical patent/EP2505688B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C18/00—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
    • C23C18/02—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by thermal decomposition
    • C23C18/12—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by thermal decomposition characterised by the deposition of inorganic material other than metallic material
    • C23C18/125—Process of deposition of the inorganic material
    • C23C18/1254—Sol or sol-gel processing
    • 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
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C18/00—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
    • C23C18/02—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by thermal decomposition
    • C23C18/04—Pretreatment of the material to be coated
    • 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
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C18/00—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
    • C23C18/02—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by thermal decomposition
    • C23C18/12—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by thermal decomposition characterised by the deposition of inorganic material other than metallic material
    • C23C18/1204—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by thermal decomposition characterised by the deposition of inorganic material other than metallic material inorganic material, e.g. non-oxide and non-metallic such as sulfides, nitrides based compounds
    • C23C18/122—Inorganic polymers, e.g. silanes, polysilazanes, polysiloxanes
    • 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
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C18/00—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
    • C23C18/02—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by thermal decomposition
    • C23C18/12—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by thermal decomposition characterised by the deposition of inorganic material other than metallic material
    • C23C18/125—Process of deposition of the inorganic material
    • C23C18/1291—Process of deposition of the inorganic material by heating of the substrate
    • 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
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C18/00—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
    • C23C18/02—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by thermal decomposition
    • C23C18/12—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by thermal decomposition characterised by the deposition of inorganic material other than metallic material
    • C23C18/125—Process of deposition of the inorganic material
    • C23C18/1295—Process of deposition of the inorganic material with after-treatment of the deposited inorganic material

Definitions

  • the present invention relates to a decoration method of a cooking vessel, such as a pot or similar vessel, and to a cooking vessel obtained according to said method.
  • a very common film is made of fluoropolymers (i.e. PTFE); such type of film can be easily decorated with any pattern, as disclosed for example in the US 5,707,688 patent which teaches the application of a stone-like decoration on cookware provided with said coating.
  • fluoropolymers i.e. PTFE
  • the fluoropolymer coating film is impaired by several drawbacks: for example, it can be easily scratched by sharp objects, thus cutting the coating and preventing the use of the cookware.
  • Such a product combines the nonstick and chemical resistance properties of an organic coating with the excellent hardness and thermal behavior of an inorganic ceramic coating.
  • a detailed description of said coating is contained in the aforementioned patent applications by the same applicant and will be briefly described hereinafter.
  • the above is mainly due to the different nature of the two materials and to the viscosity of the ceramic coating during the fabrication of the cooking vessel, which negatively affects the application of a decoration made by spraying.
  • the decor particles risk to be incorporated in the coating, without sticking to it, thus impairing the final decoration.
  • WO2008/142327 discloses a method for application of a SOL-GEL decorative layer on a nonstick background of cooking utensils as defined in the preamble of claim 1. Such a process provides for heating the cooking utensil at high temperatures comprised between 180 and 350°C.
  • the purpose of the present invention is to devise a decoration method of a cooking vessel (such as a pot, a frying pan, a baking tray or similar vessels) provided with SOL-GEL ceramic coating.
  • a cooking vessel such as a pot, a frying pan, a baking tray or similar vessels
  • the decorative patterns applied on the cooking vessels are obtained by spraying paint products that are homologous or identical to the ones used for the background coating, i.e. of SOL-GEL ceramic type.
  • a particular type of decorative pattern provides for making a matrix of small dots of different colors in such manner to obtain a decor with final aspect similar to natural stone.
  • said coating and said pigmentation are formed, aggregated and developed directly on the support (aluminum or metal of cooking vessel), originating from nanometric particles (10 -9 m, one millionth of a millimeter), unlike traditional porcelain enamel that originates from powders with dimensions thousands of times higher that melt to form a vitreous film.
  • Such coating and pigmentation are obtained from an organic liquid in alcoholic solution, called “SOL” that, after some chemical reactions, once it is sprayed on the part and baked in the oven, is first converted into “GEL” and then into a ceramic by means of alcohol evaporation.
  • SOL organic liquid in alcoholic solution
  • SOL-GEL indicates a colloidal suspension able to solidify, forming a gel that is then heated to form oxides with high purity.
  • Such a technique is known and used to produce ceramics, parts by means of casting, aerogels and very thin coatings of metal oxides.
  • the SOL is composed of solid particles with diameter of few hundreds of nanometers, usually metal inorganic salts, silicon in this case, suspended in liquid phase.
  • the material of the coating and over-applied pigmentation is silicate (therefore, of ceramic type) and has the typical characteristics of a similar coating, such as:
  • such a coating is normally applied inside the cooking vessel by spraying after the original aluminum disk is drawn into the desired shape and suitably surface-treated.
  • the method of the invention provides for the application of a decorative pattern on a SOL-GEL ceramic coating maintaining a temperature of the cooking vessel comprised between 50° and 80°C during the application of the decorative pattern.
  • the method of the invention comprises the following steps:
  • Step a) above is preferably made by means of sandblasting and the surface roughness profile is such that Ra is approximately 5 ⁇ 1 ⁇ m with a good distribution of high and low peaks.
  • the temperature is preferably comprised between 60 ° and 70 °C.
  • the thickness of coating under step c) above is preferably comprised between 20 and 50 ⁇ m.
  • the pre-heating temperature of the cooking vessel also maintained during the spraying of the pigment, allows for maintaining the viscosity of the already applied coating at such values that the single droplets of the decorative pigment do not sink completely in the background layer and maintain their punctiform aspect.
  • the method of the present invention comprises the following additional step:
  • Step d1) is performed between step d) and step e).
  • the maintenance of the desired temperature allows the droplets of the second pigment to fix perfectly, without sinking in the coating and maintaining their circular shape.
  • Such a method can be indifferently applied both on the inside and outside of the cooking vessels; if pigmentation is used on both the internal and external surface, and is made to give a natural stone-like decor to the cooking vessel, the aspect of the cooking vessel is very similar to a cooking vessel obtained from a single block of natural stone with great aesthetic appeal.
  • the coverage percentage of the dots of the pigmentation color in association with the shape of the individual dots gives a final aspect that is very similar to natural stone.
  • table 1 indicates the recommended coverage percentages of the area of the cooking vessel where said effect is to be obtained: table 1 punctiform coating % coverage of background area first color 20 ⁇ 70 second color 20 ⁇ 40 any additional colors 5 ⁇ 30
  • a further object of the present invention is a cooking vessel for food obtained according to said method.
  • Such a cooking vessel is easily recognizable because of the SOL-GEL ceramic coating, which is more difficult to scratch with a sharp object and, if scratched, tends to break differently from a PTFE coating. In fact, in the case of a SOL-GEL ceramic coating, the painted surface tends to chip rather than cut clearly.
  • pigmentation by spraying makes each cooking vessel different, with random, not repeatable painting.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Dispersion Chemistry (AREA)
  • Cookers (AREA)

Claims (9)

  1. Méthode pour la décoration d'un récipient de cuisson revêtu au moins partiellement par un revêtement en céramique du type SOL-GEL, comprenant une phase d'application d'un motif décoratif sur ledit revêtement en céramique du type SOL-GEL,
    caractérisée en ce que durant ladite phase d'application du motif décoratif, la température du récipient est maintenue dans une plage de 50° - 80°C.
  2. Méthode selon la revendication précédente, caractérisée en ce que ledit motif décoratif est une pigmentation obtenue moyennant une peinture céramique du type SOL-GEL.
  3. Méthode selon les revendications 1 ou 2, caractérisée en ce qu'elle comprend les étapes suivantes :
    a) Préparation de la surface interne et/ou externe du dit récipient de manière à ce qu'elle assume un profil superficiel rugueux idoine à l'application d'un revêtement en céramique à base de silicates du type SOL-GEL ;
    b) Réchauffement du dit récipient à une température comprise dans la plage 50°C et 80°C ;
    c) Application du dit revêtement en céramique SOL-GEL sur ladite surface interne et/ou externe du dit récipient de cuisson moyennant pulvérisation d'une ou de plusieurs couches, jusqu'à obtenir une épaisseur comprise entre 10÷60 µm ;
    d) Application par pulvérisation d'au moins une première couleur de pigmentation et maintien simultané de la température du récipient à une valeur pratiquement égale à celle de l'étape b) ;
    e) Application par pulvérisation d'une couche de protection transparente de finition ;
    f) Cuisson pour la fixation du revêtement et de la pigmentation.
  4. Méthode selon la revendication 3, caractérisée en ce que ladite étape a) comprend une phase de sablage.
  5. Méthode selon les revendications 3 ou 4, caractérisée en ce que ladite température du dit réchauffement est comprise dans une plage de 60° ÷ 70°C.
  6. Méthode selon les revendications 3, 4 ou 5, caractérisée en ce que ladite épaisseur du revêtement dont à l'étape c) est comprise dans une plage de 20÷50 µm.
  7. Méthode selon l'une des revendications de 3 à 6, caractérisée en ce qu'elle prévoit l'étape supplémentaire :
    d1) qui prévoit l'application par pulvérisation d'une seconde couleur de pigmentation et le maintien simultané de la température dont à l'étape b) ; cette étape d1 étant effectuée entre lesdites étapes d) et e).
  8. Méthode selon l'une des revendications de 3 à 7, caractérisée en ce qu'au moins l'une des dites couleurs de pigmentation soient appliquées de manière punctiforme.
  9. Méthode selon la revendication précédente, caractérisée en ce que les pourcentages de couverture de la surface du récipient sur lequel on veut obtenir ladite décoration sont compris entre 20% et 70% pour ladite première couleur de pigmentation, entre 20% et 40% pour ladite seconde couleur de pigmentation et entre 5% et 30% pour les éventuelles couleurs supplémentaires de pigmentation.
EP20120158143 2011-03-28 2012-03-05 Procédé de décoration pour un récipient de cuisson Not-in-force EP2505688B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT000039A ITAN20110039A1 (it) 2011-03-28 2011-03-28 Metodo per decorazione di un contenitore di cottura.

Publications (2)

Publication Number Publication Date
EP2505688A1 EP2505688A1 (fr) 2012-10-03
EP2505688B1 true EP2505688B1 (fr) 2013-02-20

Family

ID=43976796

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20120158143 Not-in-force EP2505688B1 (fr) 2011-03-28 2012-03-05 Procédé de décoration pour un récipient de cuisson

Country Status (2)

Country Link
EP (1) EP2505688B1 (fr)
IT (1) ITAN20110039A1 (fr)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5707688A (en) 1994-12-22 1998-01-13 E. I. Du Pont De Nemours And Company Multi-color patterned cookware
DE10320779A1 (de) * 2003-05-09 2004-11-18 Degussa Ag Korrosionsschutz auf Metallen
CA2581474A1 (fr) * 2006-03-14 2007-09-14 Cerasol Hong Kong Limited Composition de revetement de ceramique non adhesive et procede
FR2915205B1 (fr) * 2007-04-18 2009-11-20 Seb Sa Revetement antiadhesif a proprietes hydrophobes ameliorees

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Publication number Publication date
EP2505688A1 (fr) 2012-10-03
ITAN20110039A1 (it) 2012-09-29

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