Stora Enso Oyj

Kotkamills Oy

Risto Laitinen

Isto Heiskanen

Kaj Backfolk

Lars Axrup

Jari Räsänen

Anna Kauppi

Heidi Saxell

Nina Ruohoniemi

Teija Laukala

Henri Kastinen

Veikko Jokela

Ali Harlin

Henry Lindell

Jouko Silen

Mika Kankkunen

Jukka Lehtovuori

Saku Pankalainen

Saku Pänkäläinen

Sanna Lanki

The invention relates to a packaging board comprising a fibrous base and one or more polymer coating layers on one or both sides of the fibrous base. According to the invention the fibrous base contains the combination of an alkyl ketene dimer size, stearic acid anhydride, a wet-strength size and an aluminium compound, which give the board resistance to aggressive liquids as well as thermal treatment, particularly an improved resistance to raw edge penetration in such circumstances. The invention further relates to containers and packages made of the board, for instance disposable drinking cups, dairy product cartons and auto-clave packages, as well as use of the board for such purposes.

Packaging board, its use and products made thereof

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

The present invention relates to a process for the production of a paper or paperboard comprising at least two plies wherein microfibrillated cellulose is added to the surface of a first ply and the other ply is attached to the first ply so that the microfibrillated cellulose located in between the plies. The invention further relates to a paper or board produced according to the method.

Process for the production of a paper or board product and a paper or board produced according to the process

The invention provides a method of controlling retention on a forming fabric in a paper making process, an intermediate product for use in the method, as well as use of material for the intermediate product. For making the intermediate product at least one paper making chemical is added to a slurry of fine cellulose fibres such as micro fibrillated cellulose (MFC), the specific surface area of those fibres being larger than that of the fibres of the main fibrous suspension for paper making, causing the paper making chemical being adsorbed on the fine cellulose fibres. This intermediate product is then incorporated in the main fibrous suspension before the suspension is supplied from the paper machine head box to the forming fabric. Other paper making chemicals may be added to the fibrous suspension before or after addition of the intermediate product, so that interactions between different chemicals are prevented. The invention permits an increased retention in general as well as improved control of retention of paper making chemicals separately and/or in relation to each other.

Method of controlling retention and an intermediate product used in the method

The present invention relates to a process for the production of microfibrillated cellulose wherein the process comprises the steps of, providing a slurry comprising fibers, adding the slurry to an extruder, treating the slurry in the extruder so that the fibers are defibrillated and microfibrillated cellulose is formed. The invention further relates to a microfibrillated cellulose produced.

Process for the production of microfibrillated cellulose in an extruder and microfibrillated cellulose produced according to the process

Growing community of inventors

Imatra, Finland

Risto Laitinen