System for the production of a spinning dope composition

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United States of America Patent

PATENT NO 11753482
APP PUB NO 20210301033A1
SERIAL NO

17346293

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Abstract

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The present invention describes a method for the production of a spinning dope composition, said method comprising a homogenization involving vigorous mixing of a cellulosic pulp material in alkali solution, vigorous mixing implying supplying a power density to agitators used in the homogenization step of at least 150 kW/m3 (kW supplied to agitators per mixed unit of liquid volume), and thereafter a dissolution involving mixing of the cellulosic pulp material in the alkali solution to obtain a spinning dope composition, wherein the power density supplied to agitators used in the dissolution step is maximum 75 kW/m3 (kW supplied to agitators per mixed unit of liquid volume); and wherein the cellulosic pulp material in alkali solution is kept at a temperature of less than 0° C. during the homogenization and during at least part of the dissolution. The present invention is also directed to a system intended for the production of a spinning dope composition.

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Patent Owner(s)

Patent OwnerAddress
TREETOTEXTILE ABNORRA VILLAVAGEN 17 BJARRED 237 34

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Hagström, Bengt Gothenburg, SE 8 8
Köhnke, Tobias Gothenburg, SE 7 2
Olsson, Carina Gothenburg, SE 3 0

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