Stora Enso Oyj

Henri Kastinen

Lars Axrup

Isto Heiskanen

Kaj Backfolk

Esa Saukkonen

Anna Kauppi

Heidi Saxell

Risto Laitinen

Nina Ruohoniemi

Teija Laukala

Veikko Jokela

Jukka Kankkunen

Cecilia Land Hensdal

Matti Vakevainen

Ari Kotilainen

Petri Suhonen

Jani Korhonen

Teemu Tiainen

Saija Pollanen

Saija PÖLLÄNEN

Matti VÄKEVÄINEN

The present invention relates to a method for manufacturing microfibrillated polysaccharide, preferably microfibrillated cellulose. The invention also relates to microfibrillated cellulose obtainable by the method and use of the microfibrillated cellulose. The method of manufacturing microfibrillated cellulose comprises the following steps: a) Providing a hemicellulose containing pulp, b) Providing wood degrading enzymes c) Mixing pulp and enzymes d) Keeping the mixture in a continuous, flowing system of essentially cylindrical geometry (for example in a plug-flow reactor), e) Conveying the mixture to one or more mixing zones for recirculating and homogenizing the mixture, and f) Harvesting microfibrillated cellulose with a relatively narrow size distribution during the recirculation.

Method for manufacturing microfibrillated polysaccharide

The invention relates to methods of producing microfibrillated cellulose (MFC). According to the invention a fibrous pulp suspension is fibrillated mechanically at a consistency of less than 12.5%, dewatered to raise the consistency of the fibrillated suspension to at least 12.5%, and then subjected in the dewatered condition to further fibrillation. Alternatively an initially fibrillated fibrous pulp suspension may be dewatered and fibrillated in the dewatered condition, after which these dewatering and fibrillating steps are repeated one or more times so that pulp consistency is increased for each fibrillation step. The goals of raising the consistency between subsequent fibrillations are energy saving and an increased aspect ratio in MFC. The invention even comprises uses of the MFC product, e.g. as an additive for papermaking furnish or injection molded plastic composites.

Method of producing microfibrillated cellulose

A substantially dry composite material comprising a nanofibrillated polysaccharide and two or more additives, wherein the composite nanofibrillated polysaccharide is a microfibrillated cellulose and wherein the additives are lime milk and carbon dioxide, wherein the additives are allowed to react with each other and forming a precipitated calcium carbonate on the nanofibrillated polysaccharide, thereby forming a composite product comprising precipitated calcium carbonate and nanofibrillated polysaccharide.

Substantially dry composite comprising a nanofibrillated polysaccharide

A method for the production of a composite material comprising nanofibrillated polysaccharide, the method comprising the following steps:

Method for forming a subsequently drying a composite comprising a nanofibrillated polysaccharide

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Imatra, Finland

Henri Kastinen