EP2450469A1 - Verfahren zur Herstellung eines Antihaft-Kochgefäß für Lebensmittel, solch ein Kochtopf oder ähnlicher Artikel mit einer Keramikinnenbeschichtung - Google Patents

Verfahren zur Herstellung eines Antihaft-Kochgefäß für Lebensmittel, solch ein Kochtopf oder ähnlicher Artikel mit einer Keramikinnenbeschichtung Download PDF

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Publication number
EP2450469A1
EP2450469A1 EP11187293A EP11187293A EP2450469A1 EP 2450469 A1 EP2450469 A1 EP 2450469A1 EP 11187293 A EP11187293 A EP 11187293A EP 11187293 A EP11187293 A EP 11187293A EP 2450469 A1 EP2450469 A1 EP 2450469A1
Authority
EP
European Patent Office
Prior art keywords
coating
substrate
ceramic coating
manufacturing
food
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.)
Granted
Application number
EP11187293A
Other languages
English (en)
French (fr)
Other versions
EP2450469B1 (de
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
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Alluflon SpA filed Critical Alluflon SpA
Publication of EP2450469A1 publication Critical patent/EP2450469A1/de
Application granted granted Critical
Publication of EP2450469B1 publication Critical patent/EP2450469B1/de
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
    • C23C18/1204—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
    • C23C18/1208—Oxides, e.g. ceramics
    • 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
    • C23C18/1229—Composition of the substrate
    • C23C18/1241—Metallic substrates
    • 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

Definitions

  • the present patent application for industrial invention relates to a manufacturing method of a non-stick cooking vessel for food, such as a cooking pot or similar article, internally provided with ceramic coating.
  • said vessels (which are typically provided with concave shape) are manufactured starting from a metal disk, such as aluminum, which is first spin-formed and then internally sprayed with one or more PTFE layers.
  • roll coating and curtain coating techniques allow for achieving even higher speed rates with respect to the application of coating with spraying.
  • a particularly interesting coating layer is a nano-technological ceramic product obtained with SOL-GEL technique.
  • the ceramic coating is normally applied inside the cooking vessel with spraying after spin-forming the metal disk (for example aluminum) into the desired shape.
  • the reasons for manufacturing the vessel by spin- forming the metal disk first and then applying the ceramic coating are basically the same as the PTFE coating; moreover, the fact that the SOL-GEL coating is especially rigid discourages any other possibility that provides for deformation of the substrate where the coating is applied.
  • the purpose of the present invention is to overcome such a manufacturing method of cooking vessels, which provides for application of the non-stick layer necessarily after spin-forming.
  • the object of the present invention is a manufacturing method of a non-stick cooking vessel for food, such as cooking pot or similar article, internally provided with ceramic coating, according to the first attached claim.
  • said coating consists in a nano-technological ceramic product made with SOL-GEL technique.
  • Such a coating is of so-called “nano-technological” type and is made according to the “SOL-GEL” technique: it forms, aggregates and grows directly on the support starting from nanometric particles (10-9m, one millionth of a millimeter), unlike traditional glazed enamel that is generated from powders with dimensions thousands of times higher that melt to form a vitreous film.
  • Such a coating is obtained starting from an organic liquid in alcoholic solution, called “SOL” that, after some chemical reactions, after being sprayed on the piece and baked in the oven, is first converted into a “GEL” and then becomes ceramic, with alcohol evaporation.
  • SOL organic liquid in alcoholic solution
  • SOL-GEL indicates a colloidal suspension able to solidify by forming a gel that is then heated to form oxides with high purity.
  • Such a technique is known and used for production of ceramics, fabrication of parts by casting, production of aerogel 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 coating material is a silicate (and therefore ceramic type coating) with the following characteristics:
  • An additional advantage of such a material is that it polymerizes in drying oven at 200°C, thus reducing energy costs and limiting carbon dioxide (CO2) in the environment.
  • the idea of the present invention is to apply the ceramic coating to the flat metal substrate, in liquid form, and dry it at a temperature of 70° ⁇ 10°C.
  • coating does not polymerize until a final complete reticulation status and preserves relative elasticity so that it can follow the bending of the base material on which it is applied, without cracking or damaging.
  • partial reticulation following to said heating superficially forms a highly resistant film with good non-stick properties, which can resist the mechanical stress typical of spin-forming.
  • the coating of the invention can be applied to a metal disk that will be subsequently spin-formed, thus overcoming the problems of the methods known at the state of the art.
  • Complete polymerization which is necessary for the coating to have the aforementioned typical characteristics that originate from complete reticulation, is obtained after forming, through passage in baking oven at the temperature known for such type of materials.
  • the manufacturing method of the present invention for production of such a cooking vessel, in a basic shape comprises at least the following operations:
  • heating operation b) of said substrate is performed at a temperature comprised between 60°C and 70°C.
  • the vessel is designed to have the external walls provided with coating
  • additional operations can be provided on the external side of the disk, that is the side adapted to be the external surface of the vessel, such as:
  • operation c) is preceded by the preparation of the internal side, where the ceramic coating of SOL-GEL type in liquid form is applied.
  • Such preparation is the same as operation a1) for preparation of the external side of the disk and provides for:
  • the application method is one of the known methods for application on flat surfaces, such as roll coating, curtain coating, or spraying in one or more layers according to the required thickness.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • General Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Dispersion Chemistry (AREA)
  • Ceramic Engineering (AREA)
  • Cookers (AREA)
EP20110187293 2010-11-03 2011-10-31 Verfahren zur Herstellung eines Antihaft-Kochgefäß für Lebensmittel, solch ein Kochtopf oder ähnlicher Artikel mit einer Keramikinnenbeschichtung Not-in-force EP2450469B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ITAN2010A000191A IT1402442B1 (it) 2010-11-03 2010-11-03 "metodo di fabbricazione di un contenitore di cottura antiaderente per cibi, quale una pentola o simili, provvisto internamente di un rivestimento ceramico"

Publications (2)

Publication Number Publication Date
EP2450469A1 true EP2450469A1 (de) 2012-05-09
EP2450469B1 EP2450469B1 (de) 2014-10-29

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP20110187293 Not-in-force EP2450469B1 (de) 2010-11-03 2011-10-31 Verfahren zur Herstellung eines Antihaft-Kochgefäß für Lebensmittel, solch ein Kochtopf oder ähnlicher Artikel mit einer Keramikinnenbeschichtung

Country Status (2)

Country Link
EP (1) EP2450469B1 (de)
IT (1) IT1402442B1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITAN20110134A1 (it) * 2011-10-07 2013-04-08 Alluflon Spa Procedimento per il decoro di contenitori da cottura dotati di rivestimento di tipo sol-gel e contenitore ottenuto con detto procedimento.

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2942646T3 (es) 2020-09-04 2023-06-05 Ind Ag Revestimiento antiadherente sin flúor y procedimiento para su producción

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4607512A (en) * 1984-07-20 1986-08-26 Seb S.A. Process for manufacturing a cookery vessel
EP1080806A2 (de) * 1999-08-26 2001-03-07 LAGOSTINA S.p.A. Verfahren zum Herstellen einer Bratpfanne oder Kochtopf mit Antihaftbeschichtung
WO2007104258A1 (en) * 2006-03-14 2007-09-20 Cerasol Hong Kong Limited Non-stick ceramic coating composition and process
WO2010123294A2 (ko) * 2009-04-24 2010-10-28 Ha Sang-Hun 조리용기의 가공방법 및 그 조리용기

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4607512A (en) * 1984-07-20 1986-08-26 Seb S.A. Process for manufacturing a cookery vessel
EP1080806A2 (de) * 1999-08-26 2001-03-07 LAGOSTINA S.p.A. Verfahren zum Herstellen einer Bratpfanne oder Kochtopf mit Antihaftbeschichtung
WO2007104258A1 (en) * 2006-03-14 2007-09-20 Cerasol Hong Kong Limited Non-stick ceramic coating composition and process
WO2010123294A2 (ko) * 2009-04-24 2010-10-28 Ha Sang-Hun 조리용기의 가공방법 및 그 조리용기

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITAN20110134A1 (it) * 2011-10-07 2013-04-08 Alluflon Spa Procedimento per il decoro di contenitori da cottura dotati di rivestimento di tipo sol-gel e contenitore ottenuto con detto procedimento.
EP2578323A1 (de) * 2011-10-07 2013-04-10 Alluflon S.p.A. Dekorationsverfahren von Kochgefäßen mit Sol-Gel-Beschichtung und durch das Verfahren erhaltenes Kochgefäß

Also Published As

Publication number Publication date
EP2450469B1 (de) 2014-10-29
IT1402442B1 (it) 2013-09-13
ITAN20100191A1 (it) 2012-05-04

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