FR2622600A1 - Enamelling composition, process for coating a metal sheet with a PTFE primer undercoat and cooking article obtained - Google Patents

Enamelling composition, process for coating a metal sheet with a PTFE primer undercoat and cooking article obtained Download PDF

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Publication number
FR2622600A1
FR2622600A1 FR8715117A FR8715117A FR2622600A1 FR 2622600 A1 FR2622600 A1 FR 2622600A1 FR 8715117 A FR8715117 A FR 8715117A FR 8715117 A FR8715117 A FR 8715117A FR 2622600 A1 FR2622600 A1 FR 2622600A1
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FR
France
Prior art keywords
weight
parts
ptfe
coating
composition
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.)
Pending
Application number
FR8715117A
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French (fr)
Inventor
Hubert Archange
Jean-Louis Lorre
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.)
SITRAM STE INDLE TRANSF METAUX
Original Assignee
SITRAM STE INDLE TRANSF METAUX
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 SITRAM STE INDLE TRANSF METAUX filed Critical SITRAM STE INDLE TRANSF METAUX
Priority to FR8715117A priority Critical patent/FR2622600A1/en
Publication of FR2622600A1 publication Critical patent/FR2622600A1/en
Pending legal-status Critical Current

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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
    • C23D5/02—Coating with enamels or vitreous layers by wet methods
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J36/00—Parts, details or accessories of cooking-vessels
    • A47J36/02—Selection of specific materials, e.g. heavy bottoms with copper inlay or with insulating inlay
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
    • B05D5/08—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures to obtain an anti-friction or anti-adhesive surface
    • B05D5/083—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures to obtain an anti-friction or anti-adhesive surface involving the use of fluoropolymers
    • B05D5/086—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures to obtain an anti-friction or anti-adhesive surface involving the use of fluoropolymers having an anchoring layer
    • 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
    • C03C8/00—Enamels; Glazes; Fusion seal compositions being frit compositions having non-frit additions
    • C03C8/14—Glass frit mixtures having non-frit additions, e.g. opacifiers, colorants, mill-additions
    • C03C8/18—Glass frit mixtures having non-frit additions, e.g. opacifiers, colorants, mill-additions containing free metals

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Food Science & Technology (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Cookers (AREA)

Abstract

According to the invention, to coat a sheet of nickel-plated decarburised steel with a polytetrafluoroethylene, enamelling of the sheet metal is carried out by means of an enamel frit to which aluminium powder has been added.

Description

L'accrochage d'une couche d'un matériau antiadhérent sur un substrat métaLLique, notamment d'un poly tétraftuoréthylène (PTFE) sur une tôle d'acier, pour son appLication à La réalisation de casseroLes, poëles ou autres appareils culinaires de cuisson, nécessite La préparation de La surface du substrat avEnt la mise en place de la matière organique. Il faut en effet réaliser une adhérence extrêmement forte entre la matière plastique et le substrat métallique pour qulil y ait une étanchéité parfaite entre eux afin d'éviter son décollement ou le détachement de particules de celle-ci, sous l'effet des chocs thermiques que le produit subit lors de son utilisation. The attachment of a layer of a non-stick material on a metallic substrate, in particular of a poly tetraftuorethylene (PTFE) on a steel sheet, for its application to the production of casseroles, stoves or other cooking cooking appliances, requires the preparation of the surface of the substrate before the establishment of organic matter. It is indeed necessary to achieve an extremely strong adhesion between the plastic material and the metal substrate so that there is a perfect seal between them in order to avoid its detachment or the detachment of particles from it, under the effect of thermal shocks that the product undergoes during use.

La présente invention entend parvenir à ce résuLtat en proposant une composition d'émaillage formant souscouche d'accrochage pour le matériau organique. The present invention intends to achieve this result by proposing an enameling composition forming a bonding sublayer for the organic material.

A cet effet, l'invention a donc pour premier objet une composition d'émailLage d'une tale d'acier destinée à constituer une sous-couche d'accrochage d'un revêtement en polytétrafluoréthylène (PTFE) constituée par une fritte d'émail frittable à une température comprise entre 800 et 9000 additionnée d'une poudre d'aluminium. To this end, the invention therefore has as its first object an enamel composition for coating a steel sheet intended to constitute a bonding undercoat of a polytetrafluoroethylene (PTFE) coating constituted by an enamel frit. sinterable at a temperature between 800 and 9000 with aluminum powder added.

De manière préférée, cette composition comporte entre 15 et 25 parties en poids de poudre d'aluminium pour 1.00 parties en poids de fritte d'émail. On s'est rendu compte en effet que La présence d'aluminium en poudre favorisait considérablement l'adhérence du PTFE, et assurait une étanchéité parfaite entre le support métallique et Le revêtement anti-adhésif PTFE. Preferably, this composition comprises between 15 and 25 parts by weight of aluminum powder per 1.00 parts by weight of enamel frit. It has in fact been realized that the presence of powdered aluminum considerably promotes the adhesion of PTFE, and ensures a perfect seal between the metal support and the non-stick PTFE coating.

La composition retenue, à la suite d'essais, pour être mise en oeuvre industriellement, comporte en plus des 100 parties en poids de fritte et de 20 parties en poids de poudre d'aluminium, 0,5 parties en poids de bentonite, 0,5 parties en poids de sulfate de lithium, 0,5 parties en poids de sulfate d'ammonium, 1,5 partie en poids de sulfate de manganèse, 8 parties en poids d'un corps suspensif et conservateur de barbotine en pH acide, 1 partie en poids d'urée et 55 parties en poids d'eau. The composition selected, following tests, to be used industrially, comprises in addition to 100 parts by weight of frit and 20 parts by weight of aluminum powder, 0.5 parts by weight of bentonite, 0 , 5 parts by weight of lithium sulphate, 0.5 parts by weight of ammonium sulphate, 1.5 parts by weight of manganese sulphate, 8 parts by weight of a suspensive and preservative body of slip in acid pH, 1 part by weight of urea and 55 parts by weight of water.

La fritte d'émail est celle que l'on trouve sur le marché, sous la référence Fritte FERRO M 8510, qui est un boro-silicate alcalin chargé en oxydes métalliques. Par ailleurs le suspensif est connu également et disponible sur le marché par la référence K76 de la firme FERRO. The enamel frit is the one found on the market, under the reference Fritte FERRO M 8510, which is an alkaline borosilicate loaded with metal oxides. In addition, the suspensive is also known and available on the market by the reference K76 from the firm FERRO.

Le substrat métallique sera pour une casserole, poêle ou sauteuse, une tôle d'acier décarburée, emboutie, dégraissée et attaquée à L'acide sulfurique pour être ensuite nickelée à raison de 0,8 à 2 g par mètre carré, à partir d'une solution de sulfate de nickel . The metal substrate will be for a saucepan, frying pan or frying pan, a decarburized, stamped, degreased and attacked steel sheet with sulfuric acid to be then nickel-plated at a rate of 0.8 to 2 g per square meter, from a nickel sulfate solution.

Un second objet de l'invention réside dans le procédé de revêtement d'un substrat métallique par un PTFE qui comprend une phase de réalisation d'une sous-couche d'accrochage de la matière organique. Cette phase consiste à enduire, notamment par pistolage, la face concernée du substrat métallique (dans le cas d'un article de cuisine, la face concave) avec la composition susdite, à faire sécher cet enduit à une température d'environ 1500 et à cuire la fritte à une température de l'ordre de 830" pendant environ 2 minutes. A second object of the invention resides in the method of coating a metal substrate with a PTFE which comprises a phase of producing a sub-layer for bonding the organic material. This phase consists in coating, in particular by spraying, the face concerned with the metal substrate (in the case of a kitchen item, the concave face) with the above composition, in drying this coating at a temperature of approximately 1500 and at cook the frit at a temperature of around 830 "for about 2 minutes.

Le broyage préalable de la composition et l'épaisseur de la couche appliquée seront de préférence réglés pour obtenir une rugosité qui soit de l'ordre de 3 à 5 microns de rugosité absolue pour une longueur prise de manière quelconque en surface de 2,54 cm. The prior grinding of the composition and the thickness of the applied layer will preferably be adjusted to obtain a roughness which is of the order of 3 to 5 microns of absolute roughness for a length taken in any way at the surface of 2.54 cm .

Enfin, un troisième objet de l'invention réside dans
L'article culinaire obtenu par ce procédé et caractérisé par la présence d'une couche d'émail formant moyen d'accrochage de la couche de PTFE.Finally, a third object of the invention resides in
The culinary article obtained by this process and characterized by the presence of an enamel layer forming a means of attachment of the PTFE layer.

L'invention trouve une application intéressante dans le domaine de la fabrication des ustensiles de cuisson.  The invention finds an interesting application in the field of manufacturing cooking utensils.

Claims (5)

REVENDICATIONS 1. Composition d'émaillage d'une tôle d'acier destinée à constituer une sous-couche d'accrochage d'un revêtement en polytétrafluoréthylène (PTFE) caractérisée en ce qu'elle est constituée par une fritte d'émail frittable à une température comprise entre 800 et 900 additionnée d'une poudre d'aluminium. 1. Enameling composition for a steel sheet intended to constitute a bonding undercoat of a polytetrafluoroethylene (PTFE) coating, characterized in that it is constituted by an enamel frit sinterable at a temperature between 800 and 900 added with aluminum powder. 2. Composition selon la revendication 1 caractérisée en ce qu'elle comporte pour 100 parties en poids de fritte d'émail entre 15 et 25 parties en poids de poudre d'aluminium. 2. Composition according to claim 1 characterized in that it comprises per 100 parts by weight of enamel frit between 15 and 25 parts by weight of aluminum powder. 3. Composition selon la revendication 2 caractérisée en ce qu'elle comporte en plus 0,5 parties en poids de bentonite, 0,5 parties en poids de sulfate de lithium, 0,5 parties en poids de sulfate d'ammonium, 1,5 partie en poids de sulfate de manganèse, 8 parties en poids d'un corps suspensif et conservateur de barbotine en pH acide, 1 partie en poids d'urée et 55 parties en poids d'eau. 3. Composition according to claim 2 characterized in that it additionally comprises 0.5 parts by weight of bentonite, 0.5 parts by weight of lithium sulphate, 0.5 parts by weight of ammonium sulphate, 1, 5 parts by weight of manganese sulphate, 8 parts by weight of a suspensive and preservative body of slip in acid pH, 1 part by weight of urea and 55 parts by weight of water. 4. Procédé pour réaliser une sous-couche d'accrochage d'un revêtement PTFE sur une tLe d'acier décarburée et nickelée, caractérisé en ce qu'on applique directement sur la tôle la composition selon l'une quelconque des revendications 1 à 4, en ce qu'on sèche cette application à une température d'environ 150 et en ce qu'on fait cuire la fritte séchée à sa température de frittage de L'ordre de 830".  4. Method for producing a bonding sub-layer of a PTFE coating on a sheet of decarburized and nickel-plated steel, characterized in that the composition according to any one of claims 1 to 4 is applied directly to the sheet metal , in that this application is dried at a temperature of approximately 150 and in that the dried frit is cooked at its sintering temperature of the order of 830 ". 5. Récipient culinaire pour la cuisson,caractérisé en ce qu'il est constitué par une t6le décarburée et nickelée emboutie revêtue intérieurement d'une sous-couche selon 5. Culinary container for cooking, characterized in that it is constituted by a decarburized and nickel-plated stamped sheet coated internally with an underlay according to Le procédé conforme à la revendication 4 et d'une couche de polytétrafluoréthylène (PTFE). The process according to claim 4 and a layer of polytetrafluoroethylene (PTFE).
FR8715117A 1987-10-30 1987-10-30 Enamelling composition, process for coating a metal sheet with a PTFE primer undercoat and cooking article obtained Pending FR2622600A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR8715117A FR2622600A1 (en) 1987-10-30 1987-10-30 Enamelling composition, process for coating a metal sheet with a PTFE primer undercoat and cooking article obtained

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8715117A FR2622600A1 (en) 1987-10-30 1987-10-30 Enamelling composition, process for coating a metal sheet with a PTFE primer undercoat and cooking article obtained

Publications (1)

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FR2622600A1 true FR2622600A1 (en) 1989-05-05

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002076633A1 (en) * 2001-03-26 2002-10-03 Kaltenbach & Voigt Gmbh & Co. Kg Coating for a handle
CN1313645C (en) * 2003-12-15 2007-05-02 许相熙 Metallic plate coated with enamel layer and containing fluorine polymer, and method for making same
WO2010012944A2 (en) * 2008-07-29 2010-02-04 Seb Sa Article with a ceramic coating and method for producing such an article using a laser
US8180010B2 (en) 2005-10-14 2012-05-15 Centre National D'etudes Spatiales Method for receiving frames of a digital stream
US8372496B2 (en) 2008-10-16 2013-02-12 Seb Sa Cooking item comprising a non-stick coating with improved properties of adhesion to the substrate
US8481902B2 (en) 2004-06-11 2013-07-09 Seb Sa Heating element production
US8501289B2 (en) 2008-10-16 2013-08-06 Seb Sa Cooking item comprising a non-stick coating with improved properties of adhesion to the substrate

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1521653A1 (en) * 1966-09-06 1969-09-25 Wandesleben Gmbh Geb Covering enamelled steel dishes with polytetrafluoroethylene
DE1579441A1 (en) * 1966-07-16 1971-05-27 Oberschwaeb Metallwaren Metal vessel for cooking, frying, baking or the like.
FR2213353A1 (en) * 1972-11-21 1974-08-02 Usinor Pretreatment of steel strip - providing a coating which can be directly enamelled
FR2224557A1 (en) * 1973-04-09 1974-10-31 Oberschwaeb Metallwaren Non-stick coatings for cooking utensils - porous enamel coatings filled with silicones are superior to ptfe.

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1579441A1 (en) * 1966-07-16 1971-05-27 Oberschwaeb Metallwaren Metal vessel for cooking, frying, baking or the like.
DE1521653A1 (en) * 1966-09-06 1969-09-25 Wandesleben Gmbh Geb Covering enamelled steel dishes with polytetrafluoroethylene
FR2213353A1 (en) * 1972-11-21 1974-08-02 Usinor Pretreatment of steel strip - providing a coating which can be directly enamelled
FR2224557A1 (en) * 1973-04-09 1974-10-31 Oberschwaeb Metallwaren Non-stick coatings for cooking utensils - porous enamel coatings filled with silicones are superior to ptfe.

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002076633A1 (en) * 2001-03-26 2002-10-03 Kaltenbach & Voigt Gmbh & Co. Kg Coating for a handle
CN1313645C (en) * 2003-12-15 2007-05-02 许相熙 Metallic plate coated with enamel layer and containing fluorine polymer, and method for making same
US8481902B2 (en) 2004-06-11 2013-07-09 Seb Sa Heating element production
US8180010B2 (en) 2005-10-14 2012-05-15 Centre National D'etudes Spatiales Method for receiving frames of a digital stream
WO2010012944A2 (en) * 2008-07-29 2010-02-04 Seb Sa Article with a ceramic coating and method for producing such an article using a laser
WO2010012944A3 (en) * 2008-07-29 2010-04-15 Seb Sa Article with a ceramic coating and method for producing such an article using a laser
US8372496B2 (en) 2008-10-16 2013-02-12 Seb Sa Cooking item comprising a non-stick coating with improved properties of adhesion to the substrate
US8501289B2 (en) 2008-10-16 2013-08-06 Seb Sa Cooking item comprising a non-stick coating with improved properties of adhesion to the substrate
US9199275B2 (en) 2008-10-16 2015-12-01 Seb Sa Cooking item comprising a non stick coating with improved properties of adhesion to the substrate

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