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US 7,740,914 B2Granted
Method to manufacture metallized paper with curtain coating
AssigneeSarriopapel Y Celulosa, S.A.
InventorsLuis Amando Ortega Mahave, José Maria Martínez Corrochano, Javier Martínez 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.
Claims9
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, wherein said first and/or second aqueous film-forming composition is selected from an acrylic polymer, an acrylic-styrene polymer, a modified acrylic polymer and their mixtures and wherein said first and/or second aqueous film-forming composition has:
- a) a low-shear viscosity, measured in a Brookfield viscometer at 60 rpm and 20° C., between 60 and 220 mPas;
- b) a high-shear viscosity, measured in a Haake viscometer at 37,750 s−1and 20° C., between 2.3 and 35 mPas;
- and
- c) a static surface tension, measured by a ring tensiometer, between 25 and 40 dyn/cm.
5 more elements
Dependencies are inferred from the claim text.