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
  • B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
  • B05D3/06—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to radiation
  • B05D3/068—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to radiation using ionising radiations (gamma, X, electrons)
• • 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
  • B05D2201/00—Polymeric substrate or laminate
• • 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

Definitions

• the present invention relates to a method for producing a carrier film coated with lacquer hardened by electron beams.
• the generation of the protective gas atmosphere is naturally complex in terms of equipment.
• the object of the present invention is to find a method of the type described in the introduction. which the use of a protective gas atmosphere is no longer necessary, but a perfect hardening by irradiation with electron beams is possible.
• the present invention accordingly relates to a process for producing a carrier film coated with lacquer hardened by electron beams, which is characterized in that a laminate is made from the carrier film, the lacquer curable by electron beams and a film made of polyester hardens by irradiation with electron beams and peels off the film.
• EBC lacquers which are curable or hardened by electron beams are known in the art as so-called EBC lacquers. This expression is used below for these lacquers for the sake of simplicity.
• the paints known in this field can be used as EBC paints.
• the term "multitude" means at least 3 or on average more than 2 groups.
• polymerizable resins with terminal acrylate or methacrylate groups or ⁇ , ⁇ - olefinically unsaturated organic resins can be used.
• Such resins are u. a. unsaturated polyester resins, acrylic resins, modified organic resins, silicone-modified organic resins and epoxy resins.
• These resins can contain conventional additives such as matting agents, tixotropic agents, dyes, pigments, stabilizers and fillers.
• a film can be used as the carrier film, as is used according to the prior art for the production of carrier films coated with EBC lacquer.
• carrier films coated with EBC lacquer There are therefore papers, nonwovens, textile webs and vulcanized fiber which can be impregnated with resins based on: phenol, urea-formaldehyde, melamine, acrylic resin dispersions, with water glass or with mixtures thereof. PVC films can also be used.
• the thickness of the carrier film can vary within wide limits and is adapted to the later intended use of the carrier film coated with EBC lacquer.
• the carrier film can, like already mentioned, colored or undyed, and it can have a decor that in any way, e.g. B. may have been generated by printing on the decor.
• the carrier film is a decorative sheet, which is a paper sheet impregnated with synthetic resin if necessary.
• Preferred synthetic resins for this are urea-formaldehyde resins, which can be mixed with acrylic resin dispersions.
• the paper web can also be impregnated from aminoplast resins, polyester resins, acrylic dispersions or mixtures thereof.
• the laminate of carrier film, EBC lacquer and polyester film can either be produced in such a way that the carrier film is coated with the curable EBC lacquer and the carrier film is laminated thereon, or that the plastic film with the curable .EBC- Lacquer coated and then the carrier film is laminated. If the carrier film or the polyester film has an extremely low thickness, it is advisable to first coat the film or film with the EBC lacquer which has the greater strength and strength.
• polyester film made of polyethylene terephthalate is preferably used as the polyester film according to the invention.
• polyester films are commercially available products, e.g. B. Available under the following registered trademarks:
• Mylar Du-Pont
• Melinex ICI
• Hostaphan Hoechst
• Terphane La Cello-Phane
• the plastic films used according to the invention made of polyester, suitably have a thickness of at least about 6 microns, preferably at least about 8 microns.
• the upper limit is expediently around 30 ⁇ m, preferably around 25 ⁇ m. So it's extremely thin films. These can be laminated onto the lacquer layer at a very high speed, e.g. B. up to about 80 m / min, without the void between EBC lacquer layer and the plastic film. It is even possible to use these films several times, despite the extremely small thickness. Thus, if the film has been peeled off after curing according to the process, it can be used again for the process according to the invention. Only after repeated use, e.g. B.
• the film is unusable for this purpose.
• the film has sufficient dimensional stability even if, as already described above, the film is peeled off from the laminate after the EBC lacquer has hardened, wound up and used again for the process according to the invention.
• the films used according to the invention can be easily removed from the cured EBC lacquer layer without leaving any residue.
• the plastic film used according to the invention can have a smooth or structured surface.
• a structuring is transferred to the surface of the hardened EBC lacquer layer.
• the surface of the EBC lacquer layer can be controlled in this way. If a plastic film is used which is filled with powdered silicates and which has a rough surface, an EBC lacquer surface is obtained which appears matt. This is a particularly surprising effect, which is still unknown. So far it has not been possible to produce EBC lacquered surfaces that appear matt.
• the particle size of the powdered silicates is adapted to the desired surface structuring effect and the thickness of the plastic film. Naturally, the particle size must not be so large that the plastic film loses its continuity.
• a good matting effect is obtained, for example, in the case of plastic films with a thickness of approximately 6-30 ⁇ m if the powdery silicates have a maximum particle size which is approximately 5 ⁇ m below the thickness of the plastic film.
• the application amount of the EBC lacquer is in the usual ranges of about 5 to 50, expediently about 10 to 40 and preferably about 20 to 30 g / m 2 .
• the carrier film can be extremely thin, in particular if the laminate is produced in the manner mentioned above by applying the curable EBC lacquer to the plastic film and then laminating the carrier film.
• Carrier films with a thickness of 15-35 ⁇ m can be used. In this way, an extremely thin carrier film coated with EBC lacquer is obtained after the plastic film has hardened and peeled off.
• An endlessly manufactured decorative paper web (paper printed with a decor), which has been impregnated and hardened with a synthetic resin mixture based on urea-formaldehyde resin and acrylic resin dispersion, is coated with a wire-knife with an electron beam-curable varnish based on urethane-acrylate.
• the amount of lacquer applied is approximately 25-30 g / m 2 .
• a 30 ⁇ m thick polyester film is laminated onto the still uncured paint.
• the lamination speed is 40 m / min.
• the resulting multilayer material web is now irradiated through the polyester film by means of high-energy electrons and is thereby hardened.
• the laminated polyester film is peeled off and wound up separately from the coated carrier film.
• the surface structure of the resulting EBC-coated carrier film corresponds to the surface structure of the polyester film, which in this case acts as a matrix.
• An endlessly produced polyester film is coated with an electron-beam-curable varnish on an acrylate base using a wire knife.
• the amount of lacquer applied is approximately 15-25 g / m 2 .
• an endlessly produced decorative paper web (40 g / m 2 ), which has been impregnated and cured with a synthetic resin mixture based on urea-formaldehyde resin and polyvinyl alcohol, is laminated onto the still uncured lacquer.
• the lamination speed is 40 m / min.
• the resulting multilayer material web is now irradiated by means of high-energy electrons through the decorative paper web impregnated and hardened with synthetic resin and is thereby hardened.
• the polyester film After leaving the Hardening zone, the polyester film is peeled off and wound up separately from the coated carrier film.
• the resulting EBC-coated film is thin and is characterized by high flexibility combined with very good surface properties.
• the structure of the surface corresponds to the surface structure of the polyester film acting as a matrix.

Landscapes

• Health & Medical Sciences (AREA)
• General Health & Medical Sciences (AREA)
• Toxicology (AREA)
• Physics & Mathematics (AREA)
• Engineering & Computer Science (AREA)
• Plasma & Fusion (AREA)
• Application Of Or Painting With Fluid Materials (AREA)
• Laminated Bodies (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=6105921

Family Applications (1)

Country Status (5)

Cited By (3)

Families Citing this family (3)

Citations (3)

• 1980
  • 1980-06-28 DE DE19803024582 patent/DE3024582A1/de not_active Withdrawn
• 1981
  • 1981-06-20 EP EP81104763A patent/EP0043063A1/de not_active Withdrawn
  • 1981-06-24 JP JP9680281A patent/JPS5730576A/ja active Pending
  • 1981-06-25 ES ES503356A patent/ES8301770A1/es not_active Expired
  • 1981-06-26 DK DK282081A patent/DK282081A/da not_active Application Discontinuation

Patent Citations (3)

Also Published As

Similar Documents

Legal Events