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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 11299556 B1

PDFFull Text
Date of Patent:
Apr. 12, 2022

Filed:

Apr. 12, 2017

Method for the production of a spinning dope composition

Applicant:

Treetotextile Ab, Bjärred, SE;

Inventors:

Carina Olsson, Gothenburg, SE;

Bengt Hagström, Gothenburg, SE;

Tobias Köhnke, Gothenburg, SE;

Assignee:

TREETOTEXTILE AB, Bjarred, SE;

Attorney:

Moser Taboada

Primary Examiner:

Leo B Tentoni

Int. Cl.
CPC ...
C08B 1/00 (2006.01); C08B 1/08 (2006.01); C08B 9/00 (2006.01); C08B 9/04 (2006.01); C08B 9/06 (2006.01); C08B 15/06 (2006.01); C08K 3/02 (2006.01); C08K 5/21 (2006.01); C08L 1/02 (2006.01); C08L 1/22 (2006.01); C08L 97/02 (2006.01); D01D 5/06 (2006.01); D01F 1/10 (2006.01); D01D 1/02 (2006.01); D01F 2/02 (2006.01); C08J 3/05 (2006.01); C08K 3/22 (2006.01);
U.S. Cl.
CPC ...
C08B 1/003 (2013.01); C08J 3/05 (2013.01); D01D 1/02 (2013.01); D01F 2/02 (2013.01); C08K 2003/2296 (2013.01);
Abstract

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 k W/m(k W 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 k W/m(k W 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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