EP0424072A1 - Ustensile de cuisson - Google Patents

Ustensile de cuisson Download PDF

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Publication number
EP0424072A1
EP0424072A1 EP90311275A EP90311275A EP0424072A1 EP 0424072 A1 EP0424072 A1 EP 0424072A1 EP 90311275 A EP90311275 A EP 90311275A EP 90311275 A EP90311275 A EP 90311275A EP 0424072 A1 EP0424072 A1 EP 0424072A1
Authority
EP
European Patent Office
Prior art keywords
stick
aluminium
cookware
hard
anodizing
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.)
Withdrawn
Application number
EP90311275A
Other languages
German (de)
English (en)
Inventor
Stanley Kin-Sui Cheung
Massayuki Umehara
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.)
Meyer Manufacturing Co Ltd
Original Assignee
Meyer Manufacturing Co Ltd
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 Meyer Manufacturing Co Ltd filed Critical Meyer Manufacturing Co Ltd
Publication of EP0424072A1 publication Critical patent/EP0424072A1/fr
Withdrawn legal-status Critical Current

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    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
    • C25D11/02—Anodisation
    • C25D11/04—Anodisation of aluminium or alloys based thereon
    • C25D11/18—After-treatment, e.g. pore-sealing

Definitions

  • This invention relates to cookware having a non-stick cooking surface. Also the invention relates to the application of a non-stick coating such as polytetrafluoroethylene (PTFE) to an aluminium substrate which can thereafter be used for cookware.
  • a non-stick coating such as polytetrafluoroethylene (PTFE)
  • non-stick surfaces it is very well known to apply various non-stick surfaces to cookware and by far and away the most widely used and best known non-stick surface is that provided by a PTFE coating.
  • a PTFE coating Such coatings are applied to the interior surfaces of cookware and the cookware may for example be made from a number of materials including aluminium.
  • Non-stick PTFE coatings are therefore more scratch and abrasion resistant when they are applied to harder substrates such as porcelain frit coated aluminium, stainless steel or aluminium oxide coated aluminium.
  • German Patent Specification No. 1 546 934 describes the coating of an aluminium surface which has been anodized with a non-stick coating.
  • the aluminium surface is first etched and then anodized.
  • anodizing tends to dissolve away the sharp points of the roughening. Therefore the bonding of the non-stick coating to be anodized layer is not satisfactory even though the anodizing does harden the surface.
  • a method of making aluminium cookware having a non-stick food-contacting surface in which an aluminium substrate is roughened and then anodized at least in the region of its intended food-contacting surface, and a non-stick coating is applied to and adhered directly to that anodized surface, characterised in that the anodizing is hard anodizing and that a hard anodized layer of 15 to 50 microns in thickness is formed.
  • the invention also extends to the aluminium cookware made by this method.
  • a piece of aluminium cookware having a non-stick food-contacting surface, that surface comprising a non-stick coating adhered directly to a roughened porous anodized surface of the cookware, characterised in that the anodizing is hard anodizing and the anodized layer is 15 to 50 microns in thickness.
  • the non-stick coating becomes very tightly bonded to the aluminium surface as will be described and in addition the aluminium surface itself is made very hard by the hard anodizing process.
  • the anodizing of the aluminium surface is hard anodizing since, although that is more expensive than simple anodizing, the resulting hard anodized surface is very much harder than a normal anodized surface.
  • the anodizing and hard anodizing of an aluminium surface are well-known techniques and involve using the aluminium substrate as an anode in an electrolytic bath so that the aluminium surface becomes exposed to and reacts with the very active oxygen which is released at the anode.
  • the electrolyte comprises a strong acid such as sulphuric acid to secure good conduction and the ability to continue operation otherwise the anodized layer may act as an electrical insulator.
  • the anodized layer which is formed during normal anodizing is 7 to 10 microns in thickness.
  • Much thicker layers, eg of 15 to 50 microns in thickness can be achieved, however, during hard anodizing by increasing the time of the treatment and keeping the temperature of the electrolyte low, and it is preferred, according to one embodiment of the invention that the anodized layer be 35 to 40, microns in thickness.
  • the hard anodizing process as compared with a simple anodizing process involves the use of a lower temperature, a higher current density and an increased time of treatment. It is possible also to achieve a thicker anodized layer both overall, eg. 200 microns, and in the same unit time, eg. 10 microns in 30 minutes for normal anodizing compared with 40 microns in 35 minutes for hard anodizing. Further the resulting hard anodized layer is significantly harder than a simple anodized layer in that, for example, one can achieve a maximum hardness of about 200 (on Micron Vickers Scale) for a simple anodized layer whereas for a hard anodized layer the hardness is generally from 350 to 450 on the same scale.
  • the cold bath temperature keeps the surface of the anodized layer cool and reduces the dissolving of the anodized layer, particularly if the bath is very well agitated. Therefore with hard anodizing it is possible to retain the sharp roughened surface and to achieve a thick anodized layer.
  • the aluminium surface has become very porous. Normally before such a hard anodized surface is used in cookware as an exposed surface to be in contact with the food, it is sealed to fill up pores in the porous surface.
  • Typical sealing agents are nickel acetate, cobalt acetate and high pressure steam.
  • these pores are not sealed in this way and the anodized surface is deliberately left in its porous state and the primer coating and the non-stick coating are applied, or in other words the non-stick coating is applied to and adhered directly to that porous surface just as it is after the anodizing step has been completed. They are able to penetrate into this porous surface and become very firmly fixed in place.
  • smaller molecules of the non-stick material in the primer can migrate into the pores during the curing and such molecules then provide a very strong link between the porous aluminium and the resulting cured non-stick material surface so giving a stronger bond in addition to the usual mechanical bond. This greatly improves the adhesion of the non-stick coating to the aluminium surface.
  • the aluminium surface because it has been hard anodized, is about twice as hard as stainless steel and so it is not easy to scratch it and so damage the coated surface.
  • the aluminium surface to be treated should be roughened such as by the well known grit-blasting process and/or an etching process by chemical, or electro-chemical, means to produce a surface roughness within the range of 100 to 300 microinches in its profile.
  • an aluminium substrate such as the base of a cooking pan has a top surface 12. As best shown in Figure 1 this has first of all been grit-blasted or etched, chemically or electro-chemically, to provide a roughened surface with a degree of roughness of, for example, 100 to 300 microinches in its profile.
  • top surface has been hard anodized to give an anodized region 14.
  • a non-stick surface 16 is applied.
  • This comprises a primer layer 18 applied directly to this porous surface.
  • the primer is, for example, a polyphenylene sulphide which also contains a proportion of PTFE.
  • the primer penetrates into and fills the pores in the region 14.
  • a layer 20 of PTFE is applied over the primer layer 18 .
  • PTFE molecules in the primer are believed to be able to migrate into the porous anodized surface, and examples are those reference 22. Although they do not adhere chemically to the aluminium they can become mechanically trapped. Also some of them will stick together with the molecules in the layer 20 so giving a very strong mechanical connection of the layer 20 to the aluminium in addition to that given by the primer layer. It is in this way that it is believed that the very strong bond found to exist between the non-stick layer comprising the primer layer 18 and PTFE layer 20 occurs.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Cookers (AREA)
EP90311275A 1989-10-16 1990-10-15 Ustensile de cuisson Withdrawn EP0424072A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8923302 1989-10-16
GB898923302A GB8923302D0 (en) 1989-10-16 1989-10-16 Cookware

Publications (1)

Publication Number Publication Date
EP0424072A1 true EP0424072A1 (fr) 1991-04-24

Family

ID=10664666

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90311275A Withdrawn EP0424072A1 (fr) 1989-10-16 1990-10-15 Ustensile de cuisson

Country Status (2)

Country Link
EP (1) EP0424072A1 (fr)
GB (1) GB8923302D0 (fr)

Cited By (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4124730A1 (de) * 1991-07-25 1993-01-28 Friebe & Reininghaus Ahc Verfahren zur einlagerung von polymeren in mikroporoese oberflaechen
EP0594374A1 (fr) * 1992-10-23 1994-04-27 Meyer Manufacturing Co., Ltd Ustensile de cuisson et procédé pour sa modification
DE4410410A1 (de) * 1994-03-25 1995-09-28 Bosch Siemens Hausgeraete Bügeleisensohle
DE4445007A1 (de) * 1994-12-16 1996-06-20 Fissler Gmbh Verfahren zur Ausstattung eines Geschirrgegenstandes mit einer Antihaftbeschichtung
US5628426A (en) * 1995-08-16 1997-05-13 Commercial Aluminum Cookware Company Cooking device having heatable work surface of raised dots
AT403001B (de) * 1996-02-02 1997-10-27 Oesterr Forsch Seibersdorf Verfahren zur herstellung einer beschichteten oberfläche für bratpfannen
EP0928837A2 (fr) * 1998-01-09 1999-07-14 Meyer Manufacturing Co., Ltd Ustensile de cuisson et procédé de fabrication
GB2370975A (en) * 2001-01-12 2002-07-17 Meyer Manuf Co Ltd Surface treating of a cookware article
EP0902105B1 (fr) * 1997-09-10 2003-12-03 Seb S.A. Revêtement multicouche antiadhérent à dureté améliorée pour support en aluminium, articles et ustensiles culinaires comportant ce revêtement
DE102005013670A1 (de) * 2005-03-14 2006-09-21 Decoma (Germany) Gmbh Verfahren zum Behandeln einer Oberfläche
WO2007091782A1 (fr) * 2006-02-10 2007-08-16 World N & C Co., Ltd. Cuiseur pour cuisine
EP2140786A1 (fr) 2008-07-01 2010-01-06 Icb N.V. Ustensile de cuisson avec fond détachable et/ou échangeable
WO2012066253A1 (fr) 2010-11-19 2012-05-24 Seb S.A. Procede d'obtention d'un recipient de cuisson comportant une face exterieure anodisee dure coloree
ES2385156A1 (es) * 2010-12-22 2012-07-19 Bsh Electrodomesticos España, S.A. Soporte de producto de cocción.
WO2012085775A3 (fr) * 2010-12-22 2012-08-23 BSH Bosch und Siemens Hausgeräte GmbH Dispositif de maintien pour support de produit à cuire
WO2012085786A3 (fr) * 2010-12-22 2012-09-13 BSH Bosch und Siemens Hausgeräte GmbH Moufle de cuisson
WO2013068681A1 (fr) 2011-11-07 2013-05-16 Seb S.A. Procede d'obtention d'un recipient de cuisson comportant une face exterieure anodisee dure coloree
WO2013132185A1 (fr) 2012-03-07 2013-09-12 Seb S.A. Procede d'obtention d'un recipient de cuisson comportant une face exterieure anodisee dure coloree
WO2013171408A1 (fr) 2012-05-16 2013-11-21 Seb S.A. Procede d'obtention d'un recipient de cuisson comportant une face exterieure anodisee coloree electrochimiquement
US8814862B2 (en) 2005-05-12 2014-08-26 Innovatech, Llc Electrosurgical electrode and method of manufacturing same
US9630206B2 (en) 2005-05-12 2017-04-25 Innovatech, Llc Electrosurgical electrode and method of manufacturing same
CN111020665A (zh) * 2019-12-17 2020-04-17 江门市安诺特炊具制造有限公司 铝合金炊具喷涂陶瓷不粘涂层预处理工艺
US11464358B1 (en) * 2021-07-21 2022-10-11 Hpc Brands, Llc Cooking pan

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1546934A1 (de) * 1965-04-23 1970-10-22 Fissler Kg R Verfahren zur Bildung einer Schutzschicht
US3574071A (en) * 1964-07-23 1971-04-06 Gen Magnaplate Corp Fluorine-containing resin coated articles

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3574071A (en) * 1964-07-23 1971-04-06 Gen Magnaplate Corp Fluorine-containing resin coated articles
DE1546934A1 (de) * 1965-04-23 1970-10-22 Fissler Kg R Verfahren zur Bildung einer Schutzschicht

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
S. WERNICK et al.: "The surface treatment and finishing of aluminium and its alloys", 4th edition, vol. 2, 1972, pages 566-568, Robert Draper Ltd, Teddington, GB *
S. WERNICK et al.: "The surface treatment and finishing of aluminium and its alloys", 5th edition, vol. 2, 1987, pages 189,1141-1143, Finishing Publications Ltd, Teddington, GB *

Cited By (40)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4124730A1 (de) * 1991-07-25 1993-01-28 Friebe & Reininghaus Ahc Verfahren zur einlagerung von polymeren in mikroporoese oberflaechen
DE4124730C3 (de) * 1991-07-25 2001-09-06 Ahc Oberflaechentechnik Gmbh Anodisierte Gegenstände aus Aluminium oder Magnesium mit in die Oxidschicht eingelagerten Fluorpolymeren und Verfahren zu deren Herstellung
EP0594374A1 (fr) * 1992-10-23 1994-04-27 Meyer Manufacturing Co., Ltd Ustensile de cuisson et procédé pour sa modification
AU663622B2 (en) * 1992-10-23 1995-10-12 Meyer Manufacturing Company Limited A cooking utensil and a method of forming same
DE4410410A1 (de) * 1994-03-25 1995-09-28 Bosch Siemens Hausgeraete Bügeleisensohle
DE4410410B4 (de) * 1994-03-25 2007-03-29 BSH Bosch und Siemens Hausgeräte GmbH Bügeleisensohle
US5989631A (en) * 1994-12-16 1999-11-23 Fissler Gmbh Process for equipping a kitchenware object with an anti-adhesion coating
DE4445007A1 (de) * 1994-12-16 1996-06-20 Fissler Gmbh Verfahren zur Ausstattung eines Geschirrgegenstandes mit einer Antihaftbeschichtung
US5628426A (en) * 1995-08-16 1997-05-13 Commercial Aluminum Cookware Company Cooking device having heatable work surface of raised dots
AT403001B (de) * 1996-02-02 1997-10-27 Oesterr Forsch Seibersdorf Verfahren zur herstellung einer beschichteten oberfläche für bratpfannen
EP0902105B1 (fr) * 1997-09-10 2003-12-03 Seb S.A. Revêtement multicouche antiadhérent à dureté améliorée pour support en aluminium, articles et ustensiles culinaires comportant ce revêtement
EP0928837A2 (fr) * 1998-01-09 1999-07-14 Meyer Manufacturing Co., Ltd Ustensile de cuisson et procédé de fabrication
EP0928837A3 (fr) * 1998-01-09 2003-01-08 Meyer Manufacturing Co., Ltd Ustensile de cuisson et procédé de fabrication
GB2370975A (en) * 2001-01-12 2002-07-17 Meyer Manuf Co Ltd Surface treating of a cookware article
US6749081B2 (en) 2001-01-12 2004-06-15 Meyer Manufacturing Company Limited Method of surface treating a cookware article and an article so treated
GB2370975B (en) * 2001-01-12 2004-06-23 Meyer Manuf Co Ltd A method of surface treating a cookware article and an article so treated
DE102005013670A1 (de) * 2005-03-14 2006-09-21 Decoma (Germany) Gmbh Verfahren zum Behandeln einer Oberfläche
US8814863B2 (en) 2005-05-12 2014-08-26 Innovatech, Llc Electrosurgical electrode and method of manufacturing same
US10463420B2 (en) 2005-05-12 2019-11-05 Innovatech Llc Electrosurgical electrode and method of manufacturing same
US9630206B2 (en) 2005-05-12 2017-04-25 Innovatech, Llc Electrosurgical electrode and method of manufacturing same
US8814862B2 (en) 2005-05-12 2014-08-26 Innovatech, Llc Electrosurgical electrode and method of manufacturing same
US11246645B2 (en) 2005-05-12 2022-02-15 Innovatech, Llc Electrosurgical electrode and method of manufacturing same
WO2007091782A1 (fr) * 2006-02-10 2007-08-16 World N & C Co., Ltd. Cuiseur pour cuisine
EP2140786A1 (fr) 2008-07-01 2010-01-06 Icb N.V. Ustensile de cuisson avec fond détachable et/ou échangeable
WO2012066253A1 (fr) 2010-11-19 2012-05-24 Seb S.A. Procede d'obtention d'un recipient de cuisson comportant une face exterieure anodisee dure coloree
CN102477574A (zh) * 2010-11-19 2012-05-30 Seb公司 包括着色的硬质阳极氧化外表面的烧煮容器的获得方法
US9976225B2 (en) 2010-11-19 2018-05-22 Seb S.A. Method for obtaining a cooking vessel having a colored, hard, anodized outer surface
ES2385156A1 (es) * 2010-12-22 2012-07-19 Bsh Electrodomesticos España, S.A. Soporte de producto de cocción.
EP2469183A3 (fr) * 2010-12-22 2013-07-24 BSH Bosch und Siemens Hausgeräte GmbH Support de produit de cuisson
WO2012085786A3 (fr) * 2010-12-22 2012-09-13 BSH Bosch und Siemens Hausgeräte GmbH Moufle de cuisson
WO2012085775A3 (fr) * 2010-12-22 2012-08-23 BSH Bosch und Siemens Hausgeräte GmbH Dispositif de maintien pour support de produit à cuire
US10039405B2 (en) 2011-11-07 2018-08-07 Seb S.A. Method for obtaining a cooking vessel having a colored hard anodized outer face
WO2013068681A1 (fr) 2011-11-07 2013-05-16 Seb S.A. Procede d'obtention d'un recipient de cuisson comportant une face exterieure anodisee dure coloree
US9714475B2 (en) 2012-03-07 2017-07-25 Seb S.A. Method for obtaining a cooking vessel having a colored hard-anodized outer face
FR2987732A1 (fr) * 2012-03-07 2013-09-13 Seb Sa Procede d'obtention d'un recipient de cuisson comportant une face exterieure anodisee dure coloree
WO2013132185A1 (fr) 2012-03-07 2013-09-12 Seb S.A. Procede d'obtention d'un recipient de cuisson comportant une face exterieure anodisee dure coloree
EP3058854A1 (fr) 2012-05-16 2016-08-24 Seb S.A. Procédé d'obtention d'un récipient de cuisson comportant une face extérieure anodisée colorée électrochimiquement
WO2013171408A1 (fr) 2012-05-16 2013-11-21 Seb S.A. Procede d'obtention d'un recipient de cuisson comportant une face exterieure anodisee coloree electrochimiquement
CN111020665A (zh) * 2019-12-17 2020-04-17 江门市安诺特炊具制造有限公司 铝合金炊具喷涂陶瓷不粘涂层预处理工艺
US11464358B1 (en) * 2021-07-21 2022-10-11 Hpc Brands, Llc Cooking pan

Also Published As

Publication number Publication date
GB8923302D0 (en) 1989-12-06

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