Method to manufacture metallized paper with curtain coating
AssigneeSarriopapel Y Celulosa, S.A.
InventorsLuis Ortega Mahave, Jose Martinez Corrochano, Javier Martinez Esparza
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Abstract
The method comprises the stages of the curtain coating of a first aqueous film-forming composition on a substrate; and the curtain coating of a second aqueous film-forming composition on said metallized substrate, characterized in that said first and second aqueous film-forming composition comprises a first emulsion polymer and/or a second colloidal dispersion polymer.
Claims16
Method to manufacture a metallized paper which comprises the stages of:
- (i) curtain coating of a first aqueous film-forming composition on a substrate;
- (ii) metallizing the coated substrate;
- and
- (iii) curtain coating of a second aqueous film-forming composition on said metallized substrate,
- characterized in that said first and second aqueous film-forming composition comprises a first emulsion polymer and/or second colloidal dispersion polymer.
A composition which comprises a first emulsion polymer and/or a second colloidal dispersion polymer and has, at least, one of the following properties:
- (i) low-shear viscosity, measured in a Brookfield viscometer at 60 rpm and 20° C., between 60 and 220 mPas, preferably between 100 and 180 mPas;
- (ii) high-shear viscosity, measured in a Haake viscometer at 37,750 s−1 and 20° C., between 2.3 and 35 mPas, preferably between 7 and 20 mPas;
- or
- (iii) static surface tension, measured by an ring tensiometer between 20 and 40 dyn/cm, preferably between 32 and 37 dyn/cm.
Dependencies are inferred from the claim text.