EP0764474A1 - Verfahren zur Herstellung von farbigen thermoplastischen Kunststoffformteilen mit metallischem Aussehen - Google Patents

Verfahren zur Herstellung von farbigen thermoplastischen Kunststoffformteilen mit metallischem Aussehen Download PDF

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Publication number
EP0764474A1
EP0764474A1 EP96402008A EP96402008A EP0764474A1 EP 0764474 A1 EP0764474 A1 EP 0764474A1 EP 96402008 A EP96402008 A EP 96402008A EP 96402008 A EP96402008 A EP 96402008A EP 0764474 A1 EP0764474 A1 EP 0764474A1
Authority
EP
European Patent Office
Prior art keywords
colored
approximately
piece
protective varnish
mother
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
EP96402008A
Other languages
English (en)
French (fr)
Other versions
EP0764474B1 (de
Inventor
Nora Bramerel
Frédéric Viot
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.)
Peguform France SA
Original Assignee
Peguform France SA
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 Peguform France SA filed Critical Peguform France SA
Publication of EP0764474A1 publication Critical patent/EP0764474A1/de
Application granted granted Critical
Publication of EP0764474B1 publication Critical patent/EP0764474B1/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
    • B05D5/06—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
    • B05D5/065—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 having colour interferences or colour shifts or opalescent looking, flip-flop, two tones
    • 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
    • B05D5/067—Metallic effect
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B44—DECORATIVE ARTS
    • B44F—SPECIAL DESIGNS OR PICTURES
    • B44F9/00—Designs imitating natural patterns
    • B44F9/08—Designs imitating natural patterns of crystalline structures, pearl effects, or mother-of-pearl effects

Definitions

  • the present invention relates to a method of manufacturing a colored piece of thermoplastic material, having a metallic finish appearance, according to which said piece is molded by injection of a colored thermoplastic material.
  • the invention also relates to a colored part produced by injection of a colored thermoplastic material, having a metallic finish appearance.
  • the invention finds a particularly advantageous application for the production of motor vehicle hubcaps and in particular, a hubcap of a motor vehicle wheel.
  • gray polyamide is used, gray polypropylene.
  • gray polyamide is a more expensive raw material than gray polypropylene, it is most often used in this type of process.
  • documents DE-B-1083537 and DE-B-1233570 are known, methods for manufacturing plastic parts having a pearly appearance from a synthetic resin comprising a essence of pearls.
  • the present invention provides a new method of manufacturing such a part, characterized in that after the molding step, a protective varnish is applied to said colored molded part, which incorporates mother-of-pearl flakes giving the said part the desired metallic finish appearance.
  • the step consisting in applying the metallized base comprising a coloring agent and metallized glitter is omitted.
  • the metallized appearance is given according to the process according to the invention by the varnish itself, this varnish being a special varnish comprising a usual varnish base in which pearl flakes have been incorporated to give the finish appearance metallized desired for the outgoing part of production.
  • the method according to the invention has the further advantage of eliminating the use of said metallized base which is an expensive material, of using a single paint booth for applying the protective varnish, unlike the already known methods which use two spray booths for the application of the metallic base and the application of the protective varnish.
  • the process according to the present invention is a shorter process which makes it possible to increase the production rates (that is to say the number of parts per hour manufactured) and thereby reduce the production costs of these parts.
  • the elimination of the metallized base contributes to reducing the production costs of said parts.
  • the molding of the colored part is carried out with polypropylene comprising a filler of 20% of tinted talc.
  • polypropylene makes it possible to further reduce the production costs compared to the already known process, using polyamide.
  • a protective varnish comprising 2% by mass of mother-of-pearl flakes with a diameter of between approximately 50 and 150 ⁇ m.
  • This glittery protective varnish is based on polyurethane.
  • the present invention also relates to a colored part produced by injection of a colored thermoplastic material, having a metallic finish appearance, characterized in that it is coated with a protective varnish which incorporates pearl flakes giving said part the appearance of the desired metallic finish metal.
  • a part is produced using polypropylene loaded with tinted talc.
  • the protective varnish constituting the external coating of this part can be based on polyurethane and comprises mother-of-pearl flakes with a diameter of between approximately 50 and 150 ⁇ m.
  • such a colored part constitutes an embellishment of a motor vehicle wheel.
  • the method according to the present invention is a method of manufacturing a colored piece of thermoplastic material, having a finish appearance metallized, such as for example, a wheel cover of a motor vehicle which in most cases has a metallic gray appearance.
  • This manufacturing process comprises a first step consisting in molding said part by injection of a colored thermoplastic material, such as polypropylene loaded with 20% of tinted talc.
  • a colored thermoplastic material such as polypropylene loaded with 20% of tinted talc.
  • the colored molded blank that is obtained after injection has the final gray color.
  • the raw part leaving the molding is conventionally cleaned manually with isopropanol, then undergoes a flame operation allowing the surface of the part to be activated to allow the attachment of the protective varnish constituting the external layer of the part.
  • a colorless protective varnish is applied to it which incorporates pearl flakes giving the said part the desired metallic finish appearance.
  • the protective varnish used comprises approximately 2% by mass of mother-of-pearl flakes with a diameter advantageously between 50 and 150 ⁇ m.
  • This glittery protective varnish is based on polyurethane.
  • the protective varnish obtained is a special varnish which makes it possible to give a raw part after molding, the desired color appearance and metallic finish.
  • the protective varnish incorporating the mother-of-pearl glitter remains the same, since it is colorless and essentially contributes to the metallic finish appearance of said parts.

Landscapes

  • Injection Moulding Of Plastics Or The Like (AREA)
  • Laminated Bodies (AREA)
EP19960402008 1995-09-25 1996-09-23 Verfahren zur Herstellung von farbigen thermoplastischen Kunststoffformteilen mit metallischem Aussehen Expired - Lifetime EP0764474B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9511216A FR2739040B1 (fr) 1995-09-25 1995-09-25 Procede de fabrication de pieces de couleur en matiere thermoplastique d'aspect et de finition metallisee
FR9511216 1995-09-25

Publications (2)

Publication Number Publication Date
EP0764474A1 true EP0764474A1 (de) 1997-03-26
EP0764474B1 EP0764474B1 (de) 2002-04-24

Family

ID=9482881

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19960402008 Expired - Lifetime EP0764474B1 (de) 1995-09-25 1996-09-23 Verfahren zur Herstellung von farbigen thermoplastischen Kunststoffformteilen mit metallischem Aussehen

Country Status (4)

Country Link
EP (1) EP0764474B1 (de)
DE (1) DE69620840T2 (de)
ES (1) ES2174040T3 (de)
FR (1) FR2739040B1 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2767075A1 (fr) * 1997-08-05 1999-02-12 Peguform France Procede de realisation d'une surface d'aspect chrome sur un support en matiere plastique et element comportant un tel support et une telle surface
EP1467540A1 (de) * 2003-04-09 2004-10-13 Sagem SA Gehäuse und Herstellungsverfahren
EP1640134A1 (de) 2004-09-24 2006-03-29 EMS-Chemie AG Spritzgussverfahren zum Herstellen von Kunststoff-Bauteilen

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1083537B (de) * 1957-07-03 1960-06-15 Patrician Plastic Corp Verfahren zur Herstellung von Gegenstaenden aus einer aus ungesaettigten Kunstharzen und Perlessenz bestehenden Kunststoffmischung
DE1233570B (de) * 1961-06-19 1967-02-02 Mearl Corp Ossining Kunststoffkoerper aus Giessharz mit Perlmutteffekt und Verfahren zu seiner Herstellung
EP0439107A1 (de) * 1990-01-22 1991-07-31 BASF Corporation Laminargraphit enthaltende Pigmentzusammensetzung
EP0664163A1 (de) * 1994-01-19 1995-07-26 Montupet S.A. Rad, Karrosserieteil oder metallische Gegenstände, für Fahrzeuge beschichtet mit metallischem irisierendem Lack und Verfahren zur Herstellung

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1083537B (de) * 1957-07-03 1960-06-15 Patrician Plastic Corp Verfahren zur Herstellung von Gegenstaenden aus einer aus ungesaettigten Kunstharzen und Perlessenz bestehenden Kunststoffmischung
DE1233570B (de) * 1961-06-19 1967-02-02 Mearl Corp Ossining Kunststoffkoerper aus Giessharz mit Perlmutteffekt und Verfahren zu seiner Herstellung
EP0439107A1 (de) * 1990-01-22 1991-07-31 BASF Corporation Laminargraphit enthaltende Pigmentzusammensetzung
EP0664163A1 (de) * 1994-01-19 1995-07-26 Montupet S.A. Rad, Karrosserieteil oder metallische Gegenstände, für Fahrzeuge beschichtet mit metallischem irisierendem Lack und Verfahren zur Herstellung

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2767075A1 (fr) * 1997-08-05 1999-02-12 Peguform France Procede de realisation d'une surface d'aspect chrome sur un support en matiere plastique et element comportant un tel support et une telle surface
EP1467540A1 (de) * 2003-04-09 2004-10-13 Sagem SA Gehäuse und Herstellungsverfahren
FR2853789A1 (fr) * 2003-04-09 2004-10-15 Sagem Coque d'objet et procede de realisation
EP1640134A1 (de) 2004-09-24 2006-03-29 EMS-Chemie AG Spritzgussverfahren zum Herstellen von Kunststoff-Bauteilen

Also Published As

Publication number Publication date
DE69620840T2 (de) 2002-11-07
FR2739040A1 (fr) 1997-03-28
FR2739040B1 (fr) 1997-12-19
EP0764474B1 (de) 2002-04-24
DE69620840D1 (de) 2002-05-29
ES2174040T3 (es) 2002-11-01

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