Upm-kymmene Corporation

Timo Koskinen

Markus Nuopponen

Mika Kosonen

Heikki Pakarinen

Tomas Bjoerkqvist

Helmer Gustafsson

Annikki Vehniaeinen

Kaj Koskinen

Pekka Aho

Seppo Särelä

Jouni Huuskonen

Timo Toivanen

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.

Method and an apparatus for producing nanocellulose

In a method for manufacturing base paper for release paper, the body layer, which is formed of a fibre raw material, is surface sized with a surface treatment agent. Before the surface sizing, the body layer, whose moisture level is at least 13 wt. %, is calendered in a calender that comprises at least one nip formed between a hard-faced roll and a soft counter surface.

Method for manufacturing base paper for release paper

The invention relates to coated printing paper which contains mechanical pulp and whose opacity is at least 89%, brightness at least 65% and surface roughness not more than 4.5 &#x3bc;m. The printing paper contains mechanical pulp at least 90 weight-% of the total fiber content of the paper.

Printing paper

Growing community of inventors

Grand Rapids, MN, United States of America

Timo Koskinen