Process for production of metal-coated paper
AssigneeEckart-Werke Standard Bronzepulver-Werke Carl Eckart GmbH & Co.
InventorWolfgang Noack
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Abstract
A process for production of a metal-coated paper, such as for use in cigarette packs having a metal coating containing a binding agent which is applied to a paper backing material by a printing process. The coating includes particles which have a flake structure and which can be fully wetted by the binding agent, as a result of which the particles of metal are so firmly embedded into the coating as to provide sufficient abrasion resistance to permit the resulting composite paper to be used in a high-speed automatic packaging machine. In this process for producing such a paper, a tool is pressed against and passed over the metal coating while still moist to smooth out the metal coating, whereupon the metal coating is dried.
Claims36
A process for producing metal-coated paper by applying a printing ink to a paper carrier material, the process comprising the steps of:
- (a) preparing a printing ink with a coating material made by first forming a metal pigment paste containing a solvent which has an evaporation index of below 25 and metal particles having a flake structure and of a non-leafing grade, and then fully wetting the metal particles therearound of the pigment paste by a resin binding agent;
- and
- (b) applying the printing ink to the paper carrier material by an intaglio printing process in a thickness corresponding to a coating weight of from 0.5 to 10 g/m.sup.2, wherein the proportion of metal in the coating is from 5 to 90% by weight with respect to the total weight of the coating.
A process for producing metal-coated paper by applying a printing ink to a paper carrier material, the process comprising the steps of:
- (a) preparing a printing ink with a coating material made by first forming a metal pigment paste containing a solvent which has an evaporation index of below 25 and metal particles having a flake structure and of a non-leafing grade, and then fully wetting the metal particles therearound of the pigment paste by a resin binding agent in the form of a varnish;
- and
- (b) applying the printing ink to the paper carrier material by a printing process in a thickness corresponding to a coating weight of from 0.5 to 10 g/m.sup.2, wherein the proportion of metal in the coatings is from 5 to 90% by weight with respect to the total weight of the coating.
Dependencies are inferred from the claim text.