TUTCRIS - Tampereen teknillinen yliopisto


Digital printing of polymer-coated paper or board

Tutkimustuotos: Patentti


IPCG03G 7/ 00 A I
Prioriteetti päiväys16/06/05
TilaJulkaistu - 29 joulukuuta 2005
OKM-julkaisutyyppiH1 Myönnetty patentti


The invention relates to a method for digitally printing a polymer-coated paper or board (1), to a paper or board suitable for the method and to the production of a product package equipped with digital prints. During digital printing, printing ink particles are applied in an electric field to the printing surface formed of a polymer coating at locations corresponding to t he print, and the printing ink is adhered to the printing surface by fusion wit h the aid of infrared radiation.; In accordance with the invention, the paper o r board (2) to be printed is equipped with an inner coating layer (3) containi ng electrically chargeable ethene acrylate copolymer, such as ethene methyl acrylate copolymer (EMA), and with a polyolefin-based outer shield layer (4) on top of this, which contains e.g. low-density polyethene (LDPE) and provid es mechanical strength, forming the printing surface receiving the printing ink .