CELLULOSE NANOFILAMENTS WITH HIGH COEFFICIENT OF DRAWING AND PRODUCTION METHODS THEREOF Russian patent published in 2016 - IPC D21D1/30 

FIELD: pulp industry.

SUBSTANCE: proposed method comprises multi-pass refining at high consistency (MER, HCR) chemical or mechanical fibres using specific combinations of intensity of refinement and energy consumption for refining unit weight of cellulose. Cellulose nanofilaments (CNF) obtained using this invention are a mixture of thin filaments with width in sub-micrones and length from tens of micrometres to several millimetres. Obtained product forms a set of free filaments and filament associated with a core fibres, from which they are taken. Proportion of free and bound filaments is controlled, mostly, total specific energy applied to the cellulose mass in the refiner. Such CNF differ from other cellulose materials with fibrillar structure of their high coefficient of drawing and stored polymerisation degree (PD, DP) of cellulose. CNF obtained using this invention are excellent additive for strengthening of paper, cosmetic paper, paper cardboard and packaging materials, plastic composite materials and coating formulations. They demonstrate exceptional strengthening in case when used in unaffected drying paper webs.

EFFECT: disclosed is a novel method of producing on an industrial scale CNF with high coefficient of drawing of natural lignocellulose fibres.

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