EP0923457B1 - Ein metallischer gegenstand mit visuell kontrastierenden oberflächenbereichen - Google Patents

Ein metallischer gegenstand mit visuell kontrastierenden oberflächenbereichen Download PDF

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Publication number
EP0923457B1
EP0923457B1 EP97944864A EP97944864A EP0923457B1 EP 0923457 B1 EP0923457 B1 EP 0923457B1 EP 97944864 A EP97944864 A EP 97944864A EP 97944864 A EP97944864 A EP 97944864A EP 0923457 B1 EP0923457 B1 EP 0923457B1
Authority
EP
European Patent Office
Prior art keywords
layer
substrate
metallic substrate
coloured layer
laser beam
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
EP97944864A
Other languages
English (en)
French (fr)
Other versions
EP0923457A1 (de
Inventor
Dylan Edwards
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.)
Ardagh Metal Packaging Germany GmbH
Original Assignee
Schmalback Lubeca AG
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 DE19701547A external-priority patent/DE19701547A1/de
Application filed by Schmalback Lubeca AG filed Critical Schmalback Lubeca AG
Publication of EP0923457A1 publication Critical patent/EP0923457A1/de
Application granted granted Critical
Publication of EP0923457B1 publication Critical patent/EP0923457B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
    • B41M5/24—Ablative recording, e.g. by burning marks; Spark recording
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B44—DECORATIVE ARTS
    • B44C—PRODUCING DECORATIVE EFFECTS; MOSAICS; TARSIA WORK; PAPERHANGING
    • B44C1/00—Processes, not specifically provided for elsewhere, for producing decorative surface effects
    • B44C1/22—Removing surface-material, e.g. by engraving, by etching
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B44—DECORATIVE ARTS
    • B44C—PRODUCING DECORATIVE EFFECTS; MOSAICS; TARSIA WORK; PAPERHANGING
    • B44C3/00—Processes, not specifically provided for elsewhere, for producing ornamental structures
    • B44C3/005—Removing selectively parts of at least the upper layer of a multi-layer article
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D1/00—Containers having bodies formed in one piece, e.g. by casting metallic material, by moulding plastics, by blowing vitreous material, by throwing ceramic material, by moulding pulped fibrous material, by deep-drawing operations performed on sheet material
    • B65D1/12—Cans, casks, barrels, or drums
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D25/00—Details of other kinds or types of rigid or semi-rigid containers
    • B65D25/20—External fittings
    • B65D25/205—Means for the attachment of labels, cards, coupons or the like

Definitions

  • the present invention relates to metallic substrates having visually contrasting surfaces which are suitable e.g. for the production of containers such as beverage cans and the like or are such containers.
  • US-Patent 4.547,649 describes a marking system on zirconium or other metals which are able to dissolve oxygen.
  • the method includes producing a thin oxide layer on the surface of the metal and locally reducing a portion of the oxide layer using e.g. a laser beam, thereby leaving a mark of contrasting colour.
  • this method is restricted to surfaces of specific metals. Moreover, the surface of the mark is uncovered and thus is not protected against environmental influences.
  • This object is achieved by coating the metallic substrate with only one single coloured layer and partially, i.e. in the desired areas, removing (evaporating) this layer incompletely by laser irradiation.
  • removing (evaporating) this layer incompletely by laser irradiation.
  • a thin transparent "skin" or film remains which is substantially thinner than the lacquer layer. Since this skin is surprisingly translucent, the colour of the metallic substrate becomes visible, so that visual contrasts appear.
  • FIG. 1 schematically illustrates the process according to the invention and the resulting product:
  • a metallic substrate 1 is fully coated with a coloured layer 2 prior to laser ablation (A).
  • A Having evaporated the coloured layer, a remaining transparent layer 3 which is substantially thinner than the original coloured layer is shown in B in the areas 4 where the laser beam stroke.
  • fig. 2 illustrates the known process mentioned in the introductory part, in which, under the (first) coloured layer 2', the metallic substrate 1' comprises a second, differently coloured layer 5' which is directly applied onto the substrate (A'). It follows from B' that the striking of the laser beam results in the full evaporation of the first coloured layer in the affected areas 4' whereas the majority of the second layer 5' is maintained, so that the colour of the second layer 5' becomes visible for a viewer in the areas 4'.
  • the thickness of the coloured layer can be chosen freely and is determined by common considerations (scratch resistance, price, etc.). While in prior known processes the thickness of the lower coloured layer was usually 3 - 4 ⁇ m and the layer on top thereof was thinner (e.g. about 0.5 to 2 ⁇ m), the thickness of the only and coloured layer of the invention may for example be the same or less (e.g. about 2 to 4 ⁇ m, preferable less than 3 ⁇ m) compared to what was usual in known processes. Due to the laser ablation, a considerably thinner layer (e.g. having a thickness of only 1/6 to 1/3) remains, e.g. when a layer having a thickness of 3 ⁇ m is processed by the laser ablation, this may yield a transparent layer having a thickness of about 0.6 ⁇ m.
  • laser ablation may be carried out according to conventional methods.
  • the laser ablation is effected by applying a mask or stencil which covers, or vice versa exposes, letters, words, logos, figures or the like or by a printing method, e.g. printing in a dot-matrix form.
  • the energy to be actually generated can easily be calculated by a person skilled in the art and depends on the layer thickness. Of course, higher energy will lead to greater ablation.
  • the energy to be generated is markedly lower than the one used in the prior art when the layers have equal thickness. Therefore, it suffices to use an NO laser for carrying out the process according to the invention.
  • the adjustment is made such that the greater part (see above) of the coloured layer is removed from the exposed areas and the remaining skin becomes transparent in these areas, so that the metallic substrate appears as the second colour so that it appears as if it were a two-colour print.
  • the single coloured layer may be a common lacquer, e.g. an epoxy resin-type lacquer.
  • a common lacquer e.g. an epoxy resin-type lacquer.
  • dark colours being especially suitable due to the better contrast with the metallic translucent substrate (e.g. aluminum, steel).
  • the remaining thinner and colourless layer acts as a protective layer protecting the metal from atmospheric influences and/or as a contact barrier vis-à-vis any other substances which could attack the metal, and thus also as a protection against corrosion.
  • New coated metal sheets can be produced in a simple way by means of the process according to the invention. These sheets are anti-corrosive as well as have an attractive graphic form.
  • the process is also suited for the production of metal containers such as cans which are either "painted" according to the invention after shaping or produced from metal sheets treated according to the invention.
  • specific areas of the containers or cans may be treated according to the invention, e.g. the bottom and/or the tab.
  • the back side of the tab may be provided with a very small mark which serves for the manufacturer or insiders as an identification or the like.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Ceramic Engineering (AREA)
  • Laminated Bodies (AREA)
  • Details Of Rigid Or Semi-Rigid Containers (AREA)
  • Thermal Transfer Or Thermal Recording In General (AREA)
  • Chemically Coating (AREA)
  • Other Surface Treatments For Metallic Materials (AREA)
  • Physical Vapour Deposition (AREA)
  • Wrappers (AREA)
  • Rigid Containers With Two Or More Constituent Elements (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)

Claims (11)

  1. Verfahren zum Herstellen von visuell kontrastierenden Strukturen auf einem metallischen Substrat (1), wobei das mit einer einzigen farbgebenden Schicht (2) überzogene Substrat teilweise (4) mit einem Laserstrahl behandelt wird, dadurch gekennzeichnet, daß die Energie des Laserstrahls so gewählt wird, daß an den behandelten Stellen ein lichtdurchlässiger Rest (3) der Beschichtung verbleibt.
  2. Verfahren nach Anspruch 1, worin die farbgebende Schicht einen Lack vom Epoxyharz-Typ aufweist.
  3. Verfahren nach Anspruch 1 oder 2, worin die nicht dem Laserstrahl ausgesetzten Teile des überzogenen Substrats durch eine Maske abgedeckt werden.
  4. Verfahren nach Anspruch 1 oder 2, worin die Laserstrahl-Ablation mit Hilfe eines "Dot-Matrix"-Druckverfahrens erfolgt.
  5. Metallisches Substrat (1), das mit visuell kontrastierenden Strukturen versehen ist, wobei eine der Strukturen eine einzige, auf einem Teil des Substrats befindliche, farbgebende Schicht (2) ist, dadurch gekennzeichnet, daß sich auf dem restlichen Teil (4) des Substrats anstelle dieser Schicht eine einzige, lichtdurchlässige Schicht (3) befindet, die im Vergleich zu der einzigen farbgebenden Schicht (2) wesentlich dünner ist.
  6. Metallisches Substrat nach Anspruch 5, dadurch gekennzeichnet, daß die einzige farbgebende Schicht ein Lack vom Epoxyharz-Typ ist.
  7. Metallisches Substrat nach Anspruch 5 oder 6, dadurch gekennzeichnet, daß die gegenüber der farbgebenden Schicht wesentlich dünnere, lichtdurchlässige Schicht durch Bestrahlen der einzigen farbgebenden Schicht mit dem Licht eines Laserstrahls erzeugt wurde.
  8. Behälter, der zumindest teilweise aus einem metallischen Substrat nach einem der Ansprüche 5 bis 7 besteht.
  9. Getränkedose, die zumindest teilweise aus einem metallischen Substrat nach einem der Ansprüche 5 bis 7 besteht.
  10. Getränkedose mit einer Aufreißlasche, die zumindest teilweise aus einem metallischen Substrat nach einem der Ansprüche 5 bis 7 besteht.
  11. Getränkedose nach Anspruch 10, dadurch gekennzeichnet, daß die einzige farbgebende Schicht mindestens auf der Rückseite der Aufreißlasche vorhanden ist und daß die einzige lichtdurchlässige Schicht nur auf der Rückseite der Aufreißlasche vorhanden ist.
EP97944864A 1996-09-10 1997-09-09 Ein metallischer gegenstand mit visuell kontrastierenden oberflächenbereichen Expired - Lifetime EP0923457B1 (de)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DE19636763 1996-09-10
DE19636763 1996-09-10
DE19701547 1997-01-17
DE19701547A DE19701547A1 (de) 1996-09-10 1997-01-17 Mit kontrastierenden visuellen Strukturen versehener metallischer Untergrund
PCT/EP1997/004937 WO1998010945A1 (en) 1996-09-10 1997-09-09 A metallic object provided with areas of contrasting appearance

Publications (2)

Publication Number Publication Date
EP0923457A1 EP0923457A1 (de) 1999-06-23
EP0923457B1 true EP0923457B1 (de) 2001-07-18

Family

ID=26029223

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97944864A Expired - Lifetime EP0923457B1 (de) 1996-09-10 1997-09-09 Ein metallischer gegenstand mit visuell kontrastierenden oberflächenbereichen

Country Status (12)

Country Link
EP (1) EP0923457B1 (de)
KR (1) KR100488321B1 (de)
CN (1) CN1230149A (de)
AT (1) ATE203214T1 (de)
CZ (1) CZ294792B6 (de)
DE (1) DE29716186U1 (de)
DK (1) DK0923457T3 (de)
ES (1) ES2161476T3 (de)
PL (1) PL185452B1 (de)
SK (1) SK284674B6 (de)
TR (1) TR199900518T2 (de)
WO (1) WO1998010945A1 (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8146768B2 (en) 2009-02-04 2012-04-03 Rexam Beverage Can Company Tab with emboss and deboss beads
US8844747B2 (en) 2010-03-19 2014-09-30 Rexam Beverage Can Company And temperature indicating can ends and tabs
US9186924B2 (en) 2012-04-17 2015-11-17 Rexam Beverage Can Company Decorated beverage can tabs
WO2018138232A3 (en) * 2017-01-25 2018-10-04 Anheuser-Busch Inbev Sa/Nv Printing process for a beverage container

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TW473429B (en) * 1998-07-22 2002-01-21 Novartis Ag Method for marking a laminated film material
EP1225057A1 (de) * 2001-01-22 2002-07-24 Novartis AG Verfahren zum Beschriften von einem Laminatmaterialienblatt
US20130075401A1 (en) 2011-09-23 2013-03-28 Rexam Beverage Can Company Stay-on tab for a beverage container
CN109849459A (zh) * 2019-01-29 2019-06-07 大连盛维包装有限公司 一种带有金属层的复合材料及其制备方法和光泽加工方法
CN112207446A (zh) * 2020-10-13 2021-01-12 萍乡安源包装有限公司 一种漆器激光雕刻工艺及其应用

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE421880B (sv) * 1981-06-17 1982-02-08 Wladimir Wladimiroff Emne for gravering med laserstrale
US4547649A (en) * 1983-03-04 1985-10-15 The Babcock & Wilcox Company Method for superficial marking of zirconium and certain other metals
JPS631483A (ja) * 1986-06-19 1988-01-06 Mitsubishi Electric Corp 金属化粧板の着色方法
FR2649628B3 (fr) * 1989-07-12 1991-07-05 Duvicq Ets Charles Procede de marquage de pieces en aluminium par projection d'un rayon laser
GB9023243D0 (en) * 1990-10-25 1990-12-05 Cmb Foodcan Plc Containers

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8146768B2 (en) 2009-02-04 2012-04-03 Rexam Beverage Can Company Tab with emboss and deboss beads
US8844747B2 (en) 2010-03-19 2014-09-30 Rexam Beverage Can Company And temperature indicating can ends and tabs
US9186924B2 (en) 2012-04-17 2015-11-17 Rexam Beverage Can Company Decorated beverage can tabs
US10118729B2 (en) 2012-04-17 2018-11-06 Rexam Beverage Can Company Decorated beverage can tabs
WO2018138232A3 (en) * 2017-01-25 2018-10-04 Anheuser-Busch Inbev Sa/Nv Printing process for a beverage container

Also Published As

Publication number Publication date
SK31599A3 (en) 1999-10-08
CN1230149A (zh) 1999-09-29
DE29716186U1 (de) 1997-11-06
PL185452B1 (pl) 2003-05-30
KR20000036018A (ko) 2000-06-26
EP0923457A1 (de) 1999-06-23
PL331938A1 (en) 1999-08-16
KR100488321B1 (ko) 2005-07-12
CZ294792B6 (cs) 2005-03-16
SK284674B6 (sk) 2005-09-08
DK0923457T3 (da) 2001-11-05
ES2161476T3 (es) 2001-12-01
CZ81199A3 (cs) 1999-10-13
WO1998010945A1 (en) 1998-03-19
ATE203214T1 (de) 2001-08-15
TR199900518T2 (xx) 1999-07-21

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