EP0201268A2 - Verfahren zum Herstellen einer vorbeschichteten Metallbahn - Google Patents

Verfahren zum Herstellen einer vorbeschichteten Metallbahn Download PDF

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Publication number
EP0201268A2
EP0201268A2 EP86303245A EP86303245A EP0201268A2 EP 0201268 A2 EP0201268 A2 EP 0201268A2 EP 86303245 A EP86303245 A EP 86303245A EP 86303245 A EP86303245 A EP 86303245A EP 0201268 A2 EP0201268 A2 EP 0201268A2
Authority
EP
European Patent Office
Prior art keywords
coating
sheet
printing medium
process according
coated
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
EP86303245A
Other languages
English (en)
French (fr)
Other versions
EP0201268B1 (de
EP0201268A3 (en
Inventor
Derek John Crawford
John Robert Blower
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.)
COOPER COATED COIL Ltd
Original Assignee
COOPER COATED COIL 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 COOPER COATED COIL Ltd filed Critical COOPER COATED COIL Ltd
Publication of EP0201268A2 publication Critical patent/EP0201268A2/de
Publication of EP0201268A3 publication Critical patent/EP0201268A3/en
Application granted granted Critical
Publication of EP0201268B1 publication Critical patent/EP0201268B1/de
Expired 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
    • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
    • B05D7/50—Multilayers
    • B05D7/52—Two layers
    • B05D7/54—No clear coat specified
    • B05D7/546—No clear coat specified each layer being cured, at least partially, separately
    • 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
    • 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
    • B05D2202/00—Metallic substrate
    • 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
    • B05D2252/00—Sheets
    • B05D2252/02—Sheets of indefinite length

Definitions

  • This invention relates to pre-coated metal sheet suitable for use in the manufacture of bakeware and other products intended for use at high temperatures, being metal sheet which is provided with a coated finish before the sheet is used in the manufacture of such products.
  • Such pre-coated metal sheet is used in the production of bakeware and other products by various manufacturing methods including: pressing; stamping; roll-forming and deep drawing. It avoids the necessity of applying a coated finish to the product after the manufacturing process which for some products can present difficulties both in the application of a coated finish and in the obtaining of an acceptable finish.
  • the pre-coated metal sheet which has been produced for use in the manufacture of bakeware and other products intended for use at high temperatures has had a plain finish; it has not had patterns, printing or other surface decoration on it.
  • the present invention provides pre-coated metal sheet which has a surface decoration.
  • a process of producing pre-coated metal sheet having a surface decoration and suitable for use in the manufacture of bakeware and other products intended for use at high temperatures, which process comprises the steps of cleaning a raw metal sheet, applying to at least one surface of the sheet by roller means a coating of a material capable of withstanding temperatures of 250°C or higher, baking the coated sheet at a temperature of 350°C to 450°C to dry the coating, and applying as a decoration on the dried coating a printing medium compatible with the coating, followed by curing to dry the printing medium and subsequent cooling.
  • the coated sheet may be produced in flat form but preferably it is coiled.
  • the reverse roll method that is by having the roller means and sheet moving in opposite directions where they make contact for the application of the coating to the sheet, the deposition of the coating on the sheet can be closely controlled, which assists in obtaining a good quality coated finish on the sheet. Applying the coating without opposition of movement between the roller means and sheet is possible but the deposition of the coating on the sheet may be more difficult to control.
  • the printing medium may be applied by roller means or possibly by silk screen printing means.
  • the coating may be applied to both sides of the sheet.
  • the printing medium may also be applied to both sides or just to one of them, depending upon the manufacture in which the coated sheet is intended to be used.
  • suitable materials for the coating are heat resistant lacquers, a polyethylene sulphonate (PES) for flame and very high temperature resistance, and non-stick materials such as Fluon, Nuon, Teflon and Xylan (registered trade marks).
  • PES polyethylene sulphonate
  • non-stick materials such as Fluon, Nuon, Teflon and Xylan (registered trade marks).
  • Different coating materials may be used on the two sides of the sheet.
  • the side of the sheet which will be at the exterior of a product may be coated with PES and the opposite side may be coated with a non-stick material.
  • the coating may be opaque, translucent or metallic.
  • the examples of coatings mentioned will withstand usual pressing and forming operations to which the coated sheet may be subjected in the manufacture of a product.
  • PES and the non-stick materials will withstand more difficult forming and deep drawing operations.
  • a protective strippable film for example of polyethylene, may be applied to the coated sheet after the printing medium has been applied. That film will be removed after the product has been formed.
  • the printing medium which is applied to the coating must be compatible with the coating material. Generally it will contain the same base constituent as the coating material although concentrations of that constituent and of solvent and pigment will vary to suit the application of the printing medium by the roller means.
  • the coating will be applied to the sheet to a thickness of 0.25 to 1.00 mm when the sheet is of steel or up to 1.5 mm if the sheet is of aluminium, and the printing medium will be applied to a thickness which is about a quarter of that of the coating.
  • the sheet may be of mild or stainless steel, aluminium or its alloys, or possibly other metals, including clad metals such as Hi-Top or aluminized steel.
  • raw steel or aluminium strip 1 which initially is in a coil 2, is wound off the coil and taken through a series of tensioning rollers 3 to a degreasing station 4 at which a hot alkali degreasing agent is sprayed on to the two sides of the strip to remove soluble foreign matter.
  • a degreasing station 4 at which a hot alkali degreasing agent is sprayed on to the two sides of the strip to remove soluble foreign matter.
  • the strip passes between abrasive brushing rollers 5 which remove insoluble contaminants from the strip. It then passes on to a washing station 6 at which it is rinsed with hot water to wash away the alkali and contaminants loosened by the brushing rollers 5.
  • the cleansed strip has a chemical bonding agent (for example a chromate) applied to it by rollers 8 before entering an oven 7 where any moisture remaining on the strip is driven off.
  • a chemical bonding agent for example a chromate
  • the strip is directed over various rollers 9 to a coating station 10 at which coatings are applied to both surfaces of the strip by respective sets of applicating rollers 11 and 12 which operate on the reverse roll method.
  • a coating of PES such as that supplied by Crown Decorative Products Limited under the name Crown Nuon 500 which is solvent based and available in a variety of colours
  • a non-stick material such as one of those previously mentioned herein is applied.
  • the strip After the coating station 10 the strip is taken through a baking oven 13 at a peak oven temperature of 400-430°C for 60 seconds to dry off solvents of the coatings and bake the coatings. From the baking oven the coated strip passes through a cooling station 14 where it is cooled by water jets before being taken through a series of rollers 15 and being wound back into a coil 16.
  • Each of the coatings on the strips is plain and extends over the full surface of the side of the strip to which it is applied.
  • the coated strip is subsequently wound off the coil 16, taken through tensioning rollers 17 and on by way of other guide rollers 18 to a printing station 19.
  • a printing medium is applied, for example as a decorative pattern, to the PES coating of the strip by means of a suitably embossed roller 20 which operates on the forward roll method, that is it is rotating in the direction of movement of the strip, the speed of travel of the strip and the rotational speed of the roller being synchronised to ensure good definition in the pattern printed on the strip.
  • a suitable printing medium is that supplied by Crown Decorative Products Limited under the name Crown Coilprint 500.
  • the coated and printed strip is taken through a curing oven 21 where the printing medium is cured. Typically when Crown Coilprint 500 is applied as the printing medium the strip is heated in the curing oven at a peak metal temperature of 400-430°C for 60 seconds. Upon leaving the curing oven 21 the coated and printed strip is cooled at a cooling station 22 by water jets and passed round a series of rollers 23 before finally being wound into a coil 24 again.
  • a portion of the coated strip with the pattern printed on it is shown in Figure 3.
  • Other patterns, or other decoration, may be printed on the coated strip, as desired.
  • the resultant coated and printed strip is ready for use in the manufacture of bakeware products by known pressing or other forming operations.
  • the coated strip instead of being coiled between the coating and printing stages, the coated strip, after having been passed through the baking oven and cooled, could pass directly on to the printing station for the application of the printing medium, and from there through the curing oven and further cooling station before being wound into a coil.
  • the film may be applied to the strip by rollers after the curing oven and the final cooling station.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Laminated Bodies (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
EP19860303245 1985-05-03 1986-04-29 Verfahren zum Herstellen einer vorbeschichteten Metallbahn Expired EP0201268B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8511308 1985-05-03
GB08511308A GB2174315B (en) 1985-05-03 1985-05-03 Improvements relating to pre-coated metal sheet suitable for use in the manufacture of bakeware and other products intended for use at high temperatures

Publications (3)

Publication Number Publication Date
EP0201268A2 true EP0201268A2 (de) 1986-11-12
EP0201268A3 EP0201268A3 (en) 1987-07-01
EP0201268B1 EP0201268B1 (de) 1989-10-04

Family

ID=10578617

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19860303245 Expired EP0201268B1 (de) 1985-05-03 1986-04-29 Verfahren zum Herstellen einer vorbeschichteten Metallbahn

Country Status (4)

Country Link
EP (1) EP0201268B1 (de)
DE (1) DE3666000D1 (de)
ES (1) ES8706484A1 (de)
GB (1) GB2174315B (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001091926A1 (de) * 2000-06-02 2001-12-06 Basf Coatings Ag Bandbeschichtungsverfahren mit pulverlackdispersionen (pulverslurries)
US9630206B2 (en) 2005-05-12 2017-04-25 Innovatech, Llc Electrosurgical electrode and method of manufacturing same
EP2965827B1 (de) 2014-07-08 2019-05-08 ThyssenKrupp Steel Europe AG Bandbeschichtungsverfahren zur herstellung eines halbzeugs mit einer oberflächenstruktur

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5711995A (en) * 1994-12-22 1998-01-27 E. I. Du Pont De Nemours And Company Angle spraying of cookware
WO1996019300A1 (en) * 1994-12-22 1996-06-27 E.I. Du Pont De Nemours And Company Cookware with smooth-rough pattern
US5707688A (en) * 1994-12-22 1998-01-13 E. I. Du Pont De Nemours And Company Multi-color patterned cookware
US5728455A (en) * 1994-12-22 1998-03-17 E. I. Du Pont De Nemours And Company Randomly patterned cookware
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

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3663383A (en) * 1967-06-05 1972-05-16 Yawata Iron & Steel Co Method for manufacturing painted metal sheet
US4054704A (en) * 1974-09-27 1977-10-18 E. I. Du Pont De Nemours And Company Process for decorating coatings produced by heat-stable polymer compositions
GB1558464A (en) * 1975-07-29 1980-01-03 Metal Box Co Ltd Method and apparatus for providing flame cured coatings
US4259375A (en) * 1979-05-31 1981-03-31 E. I. Du Pont De Nemours And Company Decorative process
GB2120956B (en) * 1982-05-26 1985-12-04 Setsco Private Limited Process for decorative surface colouring and frosting

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001091926A1 (de) * 2000-06-02 2001-12-06 Basf Coatings Ag Bandbeschichtungsverfahren mit pulverlackdispersionen (pulverslurries)
US9630206B2 (en) 2005-05-12 2017-04-25 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
US11246645B2 (en) 2005-05-12 2022-02-15 Innovatech, Llc Electrosurgical electrode and method of manufacturing same
EP2965827B1 (de) 2014-07-08 2019-05-08 ThyssenKrupp Steel Europe AG Bandbeschichtungsverfahren zur herstellung eines halbzeugs mit einer oberflächenstruktur

Also Published As

Publication number Publication date
GB2174315A (en) 1986-11-05
ES8706484A1 (es) 1987-07-01
DE3666000D1 (en) 1989-11-09
GB2174315B (en) 1988-10-19
EP0201268B1 (de) 1989-10-04
EP0201268A3 (en) 1987-07-01
GB8511308D0 (en) 1985-06-12
ES554622A0 (es) 1987-07-01

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