Method of making soft paper
AssigneeSunds Defibrator Aktiebolag
InventorsIrene K. Wedin, Bo R. Ek
Life of this patent
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Abstract
Soft paper from cellulose fibres is manufactured by wet-forming a first fibre layer. Thereafter air-borne dry fibres are deposited directly on one or both sides of the wet-formed layer while this is still wet, so that a second and possibly a third fibre layer are formed on the first one. Fibre bindings thereby arise between the layers. The wet-formed fibre layer gives the soft paper its strength, while the dry-formed fibers give a soft surface.
Claims13
A process of manufacturing soft paper from cellulosic fibrous material comprising the steps of wet forming a first cellulosic fiber layer, and depositing an amount of dry cellulosic fibers on at least one surface of said first cellulosic fiber layer such that a first dry-formed layer of dry cellulosic fibers having a grammage of between about 2 and 20 g/m.sup.2 is fused and formed thereon, and substantially every cellulosic fiber in said first dry-formed layer is in contact with said first cellulosic fiber layer.
A soft paper article comprising a wet-formed layer of cellulosic fiber material having a first and second surface and dry cellulosic fibers deposited directly upon at least said first surface of said wet-formed layer, thereby forming a first dry-formed layer, said first dry-formed layer being sufficiently thin such that substantially every fiber therein is in contact with said wet-formed layer, and said first dry-formed layer having a grammage of between about 2 and about 20 g/m.sup.2.
Dependencies are inferred from the claim text.