32 metres for polythene paper and cardboard

A double stage line for lamination by extrusion with a length of 32 metres was recently presented by Amut Dolci Bielloni at its plant in Biassono (Monza Brianza, Italy). The line is designed for the production of various types of paper and cardboard coated with polythene, and/or laminated with alufoil. The line has a width of up to 1750 mm.

The line is equipped with automatic extrusion heads with various widths, extruders with automatic feeding and metering system for resins, automatic turret unwinders and rewinders for large diameter reels. It is also equipped with corona and/or flame treatment systems, alternatively used, according to the type and quality of paper or cardboard used. In particular, the flame treatment is applied when the chemical composition of the cardboard contains components that would develop, if corona treated, off tastes and flavours not compatible with the use of hot liquids, such as disposable cups. The total extrusion capacity of the line is 900 kg/hour and the production speed can range from 150 to 300 m/min.

The line is controlled by a central console equipped with three touch screens and by a powerful line supervisor, Dolcilogicontrol. This saves the process parameters and, in the event of an emergency stop, it promptly restores the line to the original settings. The production range includes: cardboard coated with polythene on one or both sides for the production of disposable cups; paper coated with polythene for food applications; laminated paper/aluminium for food, pharmaceutical and industrial applications; laminated paper/aluminium for industrial applications; and laminated aluminium/resin for yoghurt lids.

Amut Dolci Bielloni collaborated with Dow Chemical, which supplied various types of resins for the different applications, among them resins of new generation capable of generating an adhesion grade between paper and alufoil.