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.:
Date of Patent:
Feb. 03, 2015
Filed:
Dec. 30, 2011
Tomas Bjoerkqvist, Tampere, FI;
Timo Koskinen, Valkeakoski, FI;
Markus Nuopponen, Helsinki, FI;
Annikki Vehniaeinen, Helsinki, FI;
Sirkka Gustafsson, Kangasala, FI;
Tomas Bjoerkqvist, Tampere, FI;
Helmer Gustafsson, Kangasala, FI;
Timo Koskinen, Valkeakoski, FI;
Markus Nuopponen, Helsinki, FI;
Annikki Vehniaeinen, Helsinki, FI;
Upm-Kymmene Corporation, Helsinki, FI;
Abstract
Described herein is nanocellulose produced by introducing a mixture of cellulose based fiber raw material and water through a refining gap, having a width smaller than 0.1 mm. In the refining gap, the fiber raw material is subjected to processing forces varying in the direction of introducing said mixture, by means of refining zones provided in the gap one after each other in the feeding direction, whereby the refining surfaces differ in surface patterning and/or surface roughness. The mixture of fiber raw material and water is guided past the refining surfaces in the feeding direction to different locations in the refining zone by by-pass channels provided in the stator. The width of the refining gap is maintained by the combined effect of the feeding pressure of the mixture of fiber raw material and water fed into the refining gap and the axial force of the rotor.