Additive composition for the paper industry, and process for using the same

摘要

A formulation used in the fabrication of paper or cartons used in humid conditions comprises a clay (45 wt.%), a binder (45 wt.%) and a retention agent (10 wt.%) all in powder form. An INDEPENDENT claim is included for a fabrication process for the paper/carton starting with recycled paper fibres comprising: (i) formation of a thick cake from the fibres; (ii) refining the cake; (iii) formation of a diluted cake; (iv) mixing into the diluted cake additives especially cured starch and a retention agent; (v) formation of a layer; and (vi) drying of the layer.