Two-component, non-solvent-based polyurethane adhesives for laminating transparent, printed and metallised plastic and aluminium foil to be used for food packaging. The application value of the adhesive mixture (resin) with a hardener ranges from 1.5 to 2.5 g/m2. As a result of reaction between the two components a polymer layer is created to combine the bases of plastic foil. Upon hardening the layer is transparent, odourless, flexible and wear-resistant. Two-component adhesives with greater resistance should be used for packaging with aggressive content.
Single-component, non-solvent-based polyurethane adhesives that cross-link in the presence of humidity and at certain temperatures, which are good for laminating paper and cardboard with transparent plastic and/or metallised foil. Adhesive application value ranges from 2.8 to 4.0 g/m2.
Solvent-based two-component adhesives (resin + hardener) + solvent (ethyl acetate) applied from rotogravure cylinders. Pressure rubber roller (sleeve) whose width corresponds to the width of the laminated substrate is necessary for laminating with solvent-based adhesives. Solvent-based adhesives are more flexible and ensure greater gloss. They are used mostly for combining such materials as:
Valmet Rotomec SL500 Laminator
one- and two-component solvent-free polyurethane adhesives
possible additional activation of foil through corona-treatment on the laminated side (adhesive application side)
maximum roll diameter: 1000mm
maximum roll weight: 1000kg
maximum tape band width: 1200mm
minimum tape band width with special equipment: 400mm
unwinding from cores with diameters of: 76.2mm, 152mm
winding core diameters; 76.2 mm, 152mm
Svecom Princess 110 Laminator
a two-system laminator: solvent free and solvent-based adhesives