Method of dry-forming sheet products containing super-absorbent polymers mixed with cellulosic fibres, and absorbent products thus obtained

Method of dry-forming sheet products comprising super-absorbent polymer mixed with cellulose fibres, comprising the steps of : (a) forming a suspension, in an air stream, of an intimate mixture of cellulose fibres and super-absorbent polymer; (b) feeding said suspension to a single or multiple head for dry-forming sheets of paper; (c) laying-down said intimate mixture of cellulose fibres and super-absorbent polymer onto a moving web for dry-forming sheets of paper; (d) binding together the thus laid-down layer of fibres and polymer by means of a resin dispersion, of the type which is used for the dry-formation of paper sheets, and calendering it so as to dry-form a sheet constituted by a mixture of super-absorbent polymer and cellulose fibres. The product thus obtained shows characteristics of absorbency, resistance and distributing of the absorbed liquids, which are decidedly better than those of the known composite sheets, such as those comprising one or more supporting layers of tissue paper and/or dry-formed paper having a layer of super-absorbent polymer disposed thereon.