EP0804293B1 - Vielfärbig gemustertes kochgeschirr - Google Patents

Vielfärbig gemustertes kochgeschirr Download PDF

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Publication number
EP0804293B1
EP0804293B1 EP95944604A EP95944604A EP0804293B1 EP 0804293 B1 EP0804293 B1 EP 0804293B1 EP 95944604 A EP95944604 A EP 95944604A EP 95944604 A EP95944604 A EP 95944604A EP 0804293 B1 EP0804293 B1 EP 0804293B1
Authority
EP
European Patent Office
Prior art keywords
coating
topcoat
application
primer
color
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.)
Expired - Lifetime
Application number
EP95944604A
Other languages
English (en)
French (fr)
Other versions
EP0804293A1 (de
Inventor
Kenneth Batzar
Lori Marie Mason
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.)
EIDP Inc
Original Assignee
EI Du Pont de Nemours and Co
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
Priority claimed from US08/481,682 external-priority patent/US5711995A/en
Priority claimed from US08/482,373 external-priority patent/US5707688A/en
Priority claimed from US08/476,929 external-priority patent/US5728455A/en
Application filed by EI Du Pont de Nemours and Co filed Critical EI Du Pont de Nemours and Co
Priority to EP98203949A priority Critical patent/EP0936001A1/de
Publication of EP0804293A1 publication Critical patent/EP0804293A1/de
Application granted granted Critical
Publication of EP0804293B1 publication Critical patent/EP0804293B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • 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
    • B05D5/06—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures to obtain multicolour or other optical effects
    • B05D5/061—Special surface effect

Definitions

  • This invention concerns non-stick coated cookware, with a decorative pattern visible through a light transmitting topcoat. More specifically, it concerns such cookware with a pattern formed by discontinuous globules..
  • U.S. Patent 4,259,375 - Vassiliou (1981) discloses an article of cookware with a 3-layer coating having a discontinuous speckled or spattered pattern in a partial layer directly beneath the topcoat.
  • the spattered coating is deliberately sprayed directly on the layer under it while the under layer is still wet and soft so that the spattered layer sinks into the under layer and does not provide roughness that could telegraph through the surface. It was said that roughness would provide a place for a fork or other utensil to catch in the coating and tear the coating.
  • the spattered layer dots were also sprayed on directly, such as at 90 degrees from the substrate, so as to form more or less round dots.
  • U.S. Patent 3,961,993 - Palisin (1976) discloses spraying multilayer polymer coatings on a substrate, one layer being sprayed on top of the layer under it after the under layer has become tacky.
  • a tacky underlayer permits the successive layer to adhere better without completely merging indistinguishably with the underlayer. Still, any roughness in the upper layer would tend to smooth out as the two layers interact.
  • the present invention provides an article of cookware and a method of making it, having a cooking surface which comprises a multi-layer, non-stick coating on a substrate which coating minimizes sticking by food residues and which is heat resisting by being stable at temperatures above 300° C, wherein the coating comprises a primer adhered to the substrate, a non-stick, heat-resisting, light-transmitting topcoat, and optionally one or more intermediate coats, with the topcoat adhered to any such intermediate coats which are adhered to the primer or, in the absence of intermediate coats, the topcoat being adhered directly to the primer, with the intermediate coat under the topcoat having a first color or darkness or, in the absence of intermediate coats, the primer having a first color or darkness, characterised by spraying at least two applications of globules to form a discontinuous layer on or in and covering no more than 80% of the area of the intermediate coat under the topcoat or, in the absence of intermediate coats, the primer, said globules having at least one color or darkness which is
  • Included in the invention are a method of making an article in which the coatings are applied by spraying coating compositions successively on the substrate and ultimately heating the article to cure the coating, wherein the coating under the discontinuous coating is dried enough before applying the discontinuous coating so that substantial portions of the spattered coating remains on top of said under coating to create the roughness telegraphing through the topcoat.
  • the undercoat is not dried before applying the discontinuous coat which then sinks into the undercoat, resulting in a substantially smooth topcoat.
  • One embodiment of the process for obtaining the present invention is the drying or "flashing" the primer or intermediate coat before applying the discontinuous coat, adequately so the spattered dots do not sink into the primer or the intermediate coat.
  • air flow for 30 seconds or longer, or preheating the substrate or the air with a shorter time of air flow, will suffice.
  • the globules can be applied wet-on-wet and permitted to sink into the underlayer so long as they do not merge and lose their distinctiveness.
  • wetting is generally not a problem with most heat resistant materials useful for cookware coatings, especially perfluoropolymers such as polytetrafluoroethylene and (PTFE) and copolymers of TFE and fluorovinyl ethers (PFA).
  • PTFE polytetrafluoroethylene and
  • PFA fluorovinyl ethers
  • the coatings contain oxide-coated mica, and preferably the oxide in Ti0 2 , as described in U.S. Patents 3,087,827 - Klenke et al., 3,087,828 and 3,087,829 - both to Linton, and granted 1963.
  • a primer having the composition of Table 1 is sprayed on a clean, lightly etched aluminum substrate to a dry film thickness (DFT) of 7.5 to 10 microns, the primer is dried at 66°C for 3 minutes and a black midcoat of Table 2 is applied to a DFT of 17.5 to 20 microns.
  • the midcoat is allowed to dry at ambient temperature for 45 seconds and three separate inks or spatter coatings are applied using a DeVilbiss spatter gun to provide a discontinuous coating.
  • the inks of Table 3 or 4 are colored to be significantly different than the black midcoat background and are sprayed at a 45° angle (or at an angle of from 30 to 75°) to provide irregular shapes on the spinning substrate. The effect is to provide an appearance of natural stone.
  • the inks are not limited to solid color pigments but also include color achieved by reflectance with coated mica.
  • a topcoat of Table 5 is then applied wet-on-wet over the spattered particles.
  • the topcoat in this example, contains mica particles in a 1-15 micron particle size range so as not to interfere with the aesthetics of the spatter coat.
  • the entire system is sintered at 427 to 435°C for 5 minutes with the measured temperatures being that of the substrate metal.
  • Primer Coating Composition (Wt.
  • first discontinuous coat of a relatively darker color or optical density than the second as well as each successive globule coat being of a progressively lighter color or darkness.
  • One preferred combination is to have a black base coat (the intermediate on which the discontinuous globule coats are to be sprayed) with the first globule coat in a dark brown, the second globule coat in a lighter gray, and an optional third globule coat in white.
  • the spray is preferably done from a spatter gun, resulting in random coverage and more or less overlap of the globules of one application by those of the next application.

Landscapes

  • Application Of Or Painting With Fluid Materials (AREA)
  • Cookers (AREA)
  • Food-Manufacturing Devices (AREA)

Claims (10)

  1. Verfahren zur Herstellung eines Kochgeschirr-Gegenstands mit einer Kochoberfläche, welche eine mehrschichtige Antikleb-Beschichtung auf einem Substrat umfaßt, wobei die Beschichtung das Kleben von Lebensmittelrückständen minimiert und wärmebeständig ist, indem sie bei Temperaturen oberhalb von 300° C stabil ist, wobei die mehrschichtige Beschichtung umfaßt: (1) einen an dem Substrat haftenden Primer, (2) einen wärmebeständigen, lichtdurchlässigen Antikleb-Decküberzug und (3) gegebenenfalls einen oder mehrere Zwischenüberzüge, wobei der Decküberzug an jeglichen derartigen Zwischenüberzügen, die an dem Primer haften, haftet, oder der Decküberzug in Abwesenheit von Zwischenüberzügen direkt am Primer haftet, wobei der Zwischenüberzug unter dem Decküberzug eine erste Farbe oder Dunkelheit aufweist, oder, in der Abwesenheit von Zwischenüberzügen, der Primer eine erste Farbe oder Dunkelheit aufweist, gekennzeichnet durch das Sprühen von mindestens zwei Anwendungen von Kügelchen unter Bildung einer diskontinuierlichen Schicht auf oder in der Fläche des Zwischenüberzugs unter dem Decküberzug oder, in Abwesenheit von Zwischenüberzügen, des Primers, die nicht mehr als 80% derselben bedeckt, wobei die Kügelchen mindestens eine Farbe oder Dunkelheit aufweisen, die sich sichtbar von der ersten Farbe oder Dunkelheit unterscheidet, wie durch den Decküberzug betrachtet, wobei die erste Anwendung 30 - 80% der Fläche bedeckt und die zweite Anwendung 20 - 45% der Fläche bedeckt, wobei die zweite Anwendung mindestens 5% weniger Fläche als die erste bedeckt.
  2. Verfahren nach Anspruch 1, in welchem eine dritte Anwendung mit einer Bedeckung von 10 - 35% durchgeführt wird, wobei die dritte Anwendung mindestens 5% weniger Fläche als die zweite bedeckt.
  3. Verfahren nach Anspruch 1, in welchem die erste Anwendungsbedeckung im Bereich von 45 - 65% liegt und die zweite Anwendungsbedeckung im Bereich von 30 - 40% liegt.
  4. Verfahren nach Anspruch 3, in welchem die dritte Anwendungsbedeckung im Bereich von 15 - 30% liegt.
  5. Verfahren nach irgendeinem der Ansprüche 1 bis 4, in welchem die diskontinuierliche Schicht auf die Beschichtung unter derselben gesprüht wird, wahrend die Unterbeschichtung vor der Aufbringung der diskontinuierlichen Beschichtung teilweise getrocknet ist, um eine Textur oder Rauheit in dem Decküberzug zu erzeugen.
  6. Verfahren nach irgendeinem der Ansprüche 1 bis 4, in welchem die diskontinuierliche Schicht auf die Beschichtung unter derselben gesprüht wird, während die Unterbeschichtung noch naß genug ist, daß die Kügelchen in die Unterbeschichtung einsinken und der endgültige Decküberzug im wesentlichen glatt ist.
  7. Verfahren nach irgendeinem der Ansprüche 1 bis 6, in welchem die diskontinuierliche Schicht auf die Unterbeschichtung auf dem Substrat in einem Winkel des Mittelpunkts des Sprühstroms zum Substrat im Bereich von 30 bis 75° aufgesprüht wird, was eine gesprenkelte Beschichtung von unrunden Pünktchen erzeugt.
  8. Verfahren nach Anspruch 7, in welchem der Winkel im Bereich von 45 bis 60° liegt.
  9. Verfahren nach Anspruch 8, in welchem jede aufeinanderfolgende Kügelchen-Anwendung von hellerer Farbe oder Dunkelheit als die Schicht darunter ist.
  10. Kochgeschirr-Gegenstand, hergestellt nach irgendeinem der Verfahren nach den Ansprüchen 1 bis 9.
EP95944604A 1994-12-22 1995-12-06 Vielfärbig gemustertes kochgeschirr Expired - Lifetime EP0804293B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP98203949A EP0936001A1 (de) 1994-12-22 1995-12-06 Mehrfarbig gemustertes Kochgeschirr

Applications Claiming Priority (13)

Application Number Priority Date Filing Date Title
US36207994A 1994-12-22 1994-12-22
US36209094A 1994-12-22 1994-12-22
US36207894A 1994-12-22 1994-12-22
US362079 1994-12-22
US362078 1994-12-22
US362090 1994-12-22
US482373 1995-06-07
US08/481,682 US5711995A (en) 1994-12-22 1995-06-07 Angle spraying of cookware
US476929 1995-06-07
US08/482,373 US5707688A (en) 1994-12-22 1995-06-07 Multi-color patterned cookware
US08/476,929 US5728455A (en) 1994-12-22 1995-06-07 Randomly patterned cookware
US481682 1995-06-07
PCT/US1995/015793 WO1996019299A1 (en) 1994-12-22 1995-12-06 Multi-color patterned cookware

Related Child Applications (1)

Application Number Title Priority Date Filing Date
EP98203949A Division EP0936001A1 (de) 1994-12-22 1995-12-06 Mehrfarbig gemustertes Kochgeschirr

Publications (2)

Publication Number Publication Date
EP0804293A1 EP0804293A1 (de) 1997-11-05
EP0804293B1 true EP0804293B1 (de) 1999-06-09

Family

ID=27559843

Family Applications (2)

Application Number Title Priority Date Filing Date
EP98203949A Withdrawn EP0936001A1 (de) 1994-12-22 1995-12-06 Mehrfarbig gemustertes Kochgeschirr
EP95944604A Expired - Lifetime EP0804293B1 (de) 1994-12-22 1995-12-06 Vielfärbig gemustertes kochgeschirr

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP98203949A Withdrawn EP0936001A1 (de) 1994-12-22 1995-12-06 Mehrfarbig gemustertes Kochgeschirr

Country Status (9)

Country Link
EP (2) EP0936001A1 (de)
JP (1) JPH10510760A (de)
KR (1) KR100296070B1 (de)
CN (1) CN1090543C (de)
BR (1) BR9510489A (de)
DE (1) DE69510234T2 (de)
ES (1) ES2135114T3 (de)
HK (1) HK1004122A1 (de)
WO (1) WO1996019299A1 (de)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5667891A (en) * 1996-01-12 1997-09-16 E. I. Du Pont De Nemours And Company Randomly patterned cookware
US7147634B2 (en) 2005-05-12 2006-12-12 Orion Industries, Ltd. Electrosurgical electrode and method of manufacturing same
US8814861B2 (en) 2005-05-12 2014-08-26 Innovatech, Llc Electrosurgical electrode and method of manufacturing same
ITMI20091871A1 (it) * 2009-10-28 2011-04-29 Marco Caviada Struttura di utensile o recipiente per la cottura e metodo per la sua realizzazione.
JP6362823B2 (ja) * 2012-10-01 2018-07-25 関西ペイント株式会社 石目調模様塗膜形成方法及び石目調に塗装された塗装物品
KR101587593B1 (ko) * 2013-10-16 2016-01-22 김영 점묘화된 주방기구 및 그 제조방법
KR101490321B1 (ko) * 2014-06-16 2015-02-11 김영 도트 방식으로 코팅된 주방기구 및 그 제조방법
WO2019029710A1 (zh) * 2017-08-10 2019-02-14 佛山市顺德区美的电热电器制造有限公司 加热器具
CN114075405B (zh) * 2020-08-20 2023-01-24 佛山市顺德区美的电热电器制造有限公司 不粘涂层、不粘涂料组和烹饪设备

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3655421A (en) * 1969-08-18 1972-04-11 Gen Tire & Rubber Co Method of forming patterns on substrate surfaces
US4248816A (en) * 1979-01-04 1981-02-03 Sheridan James C Process for forming simulated marble and resulting product
US4259375A (en) * 1979-05-31 1981-03-31 E. I. Du Pont De Nemours And Company Decorative process
US4353950A (en) * 1979-07-06 1982-10-12 E. I. Du Pont De Nemours And Company Stain-resistant cookware multi-layer coating system comprising pigments and a transluscent outer layer
CA1160518A (en) * 1979-07-06 1984-01-17 E. I. Du Pont De Nemours And Company Coated cookware with fep topcoat
US5240775A (en) * 1991-09-23 1993-08-31 E. I. Du Pont De Nemours And Company Non-stick coating system with PTFE-PFA for concentration gradient
US5250356A (en) * 1992-08-28 1993-10-05 E. I. Du Pont De Nemours And Company Cookware coating system

Also Published As

Publication number Publication date
JPH10510760A (ja) 1998-10-20
ES2135114T3 (es) 1999-10-16
BR9510489A (pt) 1998-01-13
WO1996019299A1 (en) 1996-06-27
CN1171064A (zh) 1998-01-21
DE69510234T2 (de) 1999-11-04
HK1004122A1 (en) 1998-11-20
DE69510234D1 (de) 1999-07-15
EP0804293A1 (de) 1997-11-05
CN1090543C (zh) 2002-09-11
KR100296070B1 (ko) 2001-10-19
EP0936001A1 (de) 1999-08-18

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