EP1554127B1 - Verfahren zur übertragung einer beschichtung auf artikel mit verzogenen flächen - Google Patents

Verfahren zur übertragung einer beschichtung auf artikel mit verzogenen flächen Download PDF

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Publication number
EP1554127B1
EP1554127B1 EP03808755A EP03808755A EP1554127B1 EP 1554127 B1 EP1554127 B1 EP 1554127B1 EP 03808755 A EP03808755 A EP 03808755A EP 03808755 A EP03808755 A EP 03808755A EP 1554127 B1 EP1554127 B1 EP 1554127B1
Authority
EP
European Patent Office
Prior art keywords
coating
temperature
articles
transfer
pyrolysis
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
EP03808755A
Other languages
English (en)
French (fr)
Other versions
EP1554127A1 (de
Inventor
Pierre Dumoux
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP1554127A1 publication Critical patent/EP1554127A1/de
Application granted granted Critical
Publication of EP1554127B1 publication Critical patent/EP1554127B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • B44C1/16—Processes, not specifically provided for elsewhere, for producing decorative surface effects for applying transfer pictures or the like
    • B44C1/165—Processes, not specifically provided for elsewhere, for producing decorative surface effects for applying transfer pictures or the like for decalcomanias; sheet material therefor
    • B44C1/17—Dry transfer
    • B44C1/1712—Decalcomanias applied under heat and pressure, e.g. provided with a heat activable adhesive
    • 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
    • B44C1/10—Applying flat materials, e.g. leaflets, pieces of fabrics

Definitions

  • the present invention relates to a method of transferring a coating, particularly an enamel coating to left surface articles.
  • This method causes problems when the coating has a low adhesion to the article, for example in the case of enamel coating on a porcelain article.
  • the enamel does not adhere sufficiently to the porcelain so that during rinsing the enamel solution is removed together with the transfer sheet even using an adhesion promoter.
  • Document is also known FR-A-2,808,723 a method of enameling articles first consisting of making the articles in a first mold and then transferring the articles into a second mold after spraying enamel in the second mold.
  • the process of producing the decor by direct spraying in the mold does not make it possible to produce a precise decoration for being applied to left surfaces having complex shapes.
  • enamel transfer processes consisting of first projecting on a support film a water-soluble detachment layer and then producing an enamel decoration forming a flexible film on the detachment layer.
  • the assembly is soaked in water to soften the detachment layer and the enamel decoration is slid from the backing sheet onto the article to be decorated in the manner of a decal, the residues detachment layer being in contact with the outer surface of the article and serving as an adhesive to fix the decoration on the article before the enamel is fired.
  • the decorative layer In order to be able to be slipped from the support film onto the article to be decorated, the decorative layer must have an appropriate thickness to constitute a film having sufficient strength during the transfer, so that this decorative layer has sufficient flexibility to adapt to a slightly curved surface, but does not have sufficient flexibility to adapt to left surfaces of complex shapes.
  • An object of the invention is to provide a method for applying a coating on left surface articles even when the coating has a low adhesion.
  • the method of transferring a coating to left surface articles comprises the steps of applying to the articles a coating carried by a transfer medium having a pyrolysis temperature lower than a melting temperature of the coating, the coating itself having a bonding temperature lower than the pyrolysis temperature of the transfer medium, then subjecting the articles thus coated to the melting temperature of the coating.
  • the coating to be transferred for example an enamel coating having a melting temperature of between about 600 ° C. and 1300 ° C., which may also be a single layer. of uniform color, is printed by an electrostatic system (enamel toner), ink jet, screen printing, heliography, or by any other means on a water-soluble film having a pyrolysis temperature between about 300 ° C and 400 ° C ° C.
  • the support film is pre-cut according to a sheet which is deposited on the upper surface of a tank filled with water. After softening the transfer sheet, the articles to be decorated are immersed in a bath, which causes an intimate contact of the coating and the softened transfer medium with the surface of the articles.
  • the articles are then extracted from the transfer bath and placed directly without rinsing them in a cooking chamber in which they are brought to a melting temperature of the coating.
  • the coating passes through an attachment temperature which is lower than the pyrolysis temperature of the transfer medium (and at the melting temperature of the coating) and which is sufficient to allow the coating to remain in place on the article at the time of pyrolysis of the transfer medium.
  • This attachment temperature corresponds either to the melting or cooking of a binder initially contained in the coating or added just before the application of the coating, or to the appearance of forces resulting from the heating. of the material forming the coating prior to melting thereof. In the case of a binder, it can also be pyrolyzed during the melting of the coating.
  • the binder can nevertheless maintain a coupling of the coating at least until a melting of the coating due to the temperature gradient inside the layer forming the coating, even when the articles are introduced into an oven preheated to the melting temperature of the coating.
  • an extensible support film is pre-printed with a coating which is dried and then the support film is cut into a mold bottom contour and placed in a mold where it is kept pressed into the bottom of the mold.
  • mold for example by an electrostatic system or by a vacuum, then the material constituting the items to be decorated is introduced into the mold and, after demolding, the resulting article is directly sent into a baking oven that simultaneously ensures the cooking of the article, enamel fusion and pyrolysis of the transfer medium.
  • the film is not pre-cut but advanced step by step at each molding cycle and the decorated part to be applied to the article is cut in the film during the closure of the mold.
  • the coating to be transferred is pre-printed by means of an enamel solution on a heat-shrinkable film which is placed on the part to be decorated, for example by putting it first under a protective coating. tubular shape, then the assembly is raised in temperature to a melting temperature of the enamel solution, which firstly causes the retraction of the heat-shrinkable film and then its pyrolysis simultaneously with the melting of the enamel solution.
  • the enamel solution can be dried after printing to allow easier handling of the transfer medium, the enamel solution can be reactivated just before transfer.
  • the transfer medium may also be attached to a handling medium, such as a sheet of paper, to further improve handling before the actual transfer operation.
  • the invention applies to other coatings than the enamel solution, for example to a polymer coating intended to seal a porous article or a coating intended to modify the surface characteristics (slip, adhesion, dullness, touch ...), the coating to be applied having a melting temperature higher than the pyrolysis temperature of the transfer medium and a bonding temperature lower than the pyrolysis temperature of the transfer medium.
  • the coating to be transferred is supported by the transfer medium until the melting of the coating, so it is possible to produce a coating in a very thin layer which adapts to precisely, even on shapes with very complex contours.
  • the transfer support portion that is not removed is determined to maintain the coating in place given the nature of the transfer medium.
  • an enamel solution initially supported by a water-soluble film having a thickness of 40 ⁇ m can be, after immersion, perform a partial rinse to reduce the remaining thickness of the film to about 5 microns. The remaining portion of the film is removed by pyrolysis during the rise in temperature.
  • the article is made by introduction into the mold of the material constituting the article, it is possible to separate the articles and then to introduce them into the mold which serves then only to apply the coating on the items.
  • the invention is not limited to the embodiments described and variations can be made without departing from the scope of the invention as defined by the claims.
  • the material constituting the transfer medium will be adapted to the transfer mode chosen.

Landscapes

  • Decoration By Transfer Pictures (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)

Claims (2)

  1. Das transferverfahren einer schicht auf teile mit komplexer form, charakterisiert durch die auftragsschritte auf die betreffenden teile eine schicht getragen durch einen transferträger, der eine niedrigere pyrolysetemperatur als die schmelztemperatur der schicht aufweist, die Schicht weist selbst eine haftungstemperatur niedriger als die pyrolysetemperatur des transferträgers auf, und die auf diese weise beschichteten teile der schmelztemperatur unterbreiten.
  2. Transferverfahren anspruchsmäßig 1, charakterisiert durch die tatsache, dass der transferträger zum teil eliminiert wird bevor die teile einer höheren temperatur unterbreitet werden.
EP03808755A 2002-10-15 2003-10-10 Verfahren zur übertragung einer beschichtung auf artikel mit verzogenen flächen Expired - Lifetime EP1554127B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR0212780A FR2845637B1 (fr) 2002-10-15 2002-10-15 Procede de transfert d'un revetement sur des articles a surface gauche
FR0212780 2002-10-15
PCT/FR2003/002990 WO2004035325A1 (fr) 2002-10-15 2003-10-10 Procede de transfert d'un revetement sur des articles a surface gauche

Publications (2)

Publication Number Publication Date
EP1554127A1 EP1554127A1 (de) 2005-07-20
EP1554127B1 true EP1554127B1 (de) 2008-12-31

Family

ID=32039732

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03808755A Expired - Lifetime EP1554127B1 (de) 2002-10-15 2003-10-10 Verfahren zur übertragung einer beschichtung auf artikel mit verzogenen flächen

Country Status (7)

Country Link
US (1) US7156941B2 (de)
EP (1) EP1554127B1 (de)
AT (1) ATE419130T1 (de)
AU (1) AU2003301274A1 (de)
DE (1) DE60325625D1 (de)
FR (1) FR2845637B1 (de)
WO (1) WO2004035325A1 (de)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3632365A (en) * 1967-07-13 1972-01-04 Owens Illinois Inc Decorative decal with a pyrolyzable film base
US3655496A (en) * 1969-09-25 1972-04-11 Vitta Corp Tape transfer of sinterable conductive, semiconductive or insulating patterns to electronic component substrates
ZA737651B (en) * 1972-11-20 1974-08-28 Meyercord Co Ceramic decalcomania and method of making
JPS5121914A (ja) * 1974-08-12 1976-02-21 Mikiiku Nakanishi Insatsuhoho
CH608315B (de) * 1974-09-19 Schlaepfer & Co Ag Durch heissiegelung auf einem zu dekorierenden substrat anbringbares stickereielement und verfahren zu dessen herstellung.

Also Published As

Publication number Publication date
DE60325625D1 (de) 2009-02-12
AU2003301274A1 (en) 2004-05-04
FR2845637A1 (fr) 2004-04-16
EP1554127A1 (de) 2005-07-20
US20050271822A1 (en) 2005-12-08
FR2845637B1 (fr) 2005-01-07
ATE419130T1 (de) 2009-01-15
WO2004035325A1 (fr) 2004-04-29
US7156941B2 (en) 2007-01-02

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