Other

Stora Enso Oyj

Ipco Sweden Ab

Sven Norgren

Gunilla Pettersson

Hans E Hoglund

Frank Peng

Anders Moberg

Per Engstrand

Hallgren Hans

Hans Höglund

A method of producing a paper or paperboard product having at least one ply comprising high yield pulp (HYP), comprising the steps of: &#x2014;providing a furnish comprising at least 50% of high yield pulp (HYP) of a total pulp content in said furnish, said high yield pulp being produced with a wood yield above 85%; &#x2014;dewatering the furnish to form a moist web and pressing said moist web to a dry solids content of at least 40-70%; and &#x2014;densifying the moist web to a density above 600 kg/m3 in a press nip of a paper machine at a temperature above a softening temperature of water-saturated lignin comprised in said high yield pulp to provide a paper or paperboard product, containing at least 30% high yield pulp (HYP) of a total pulp content of said product.

Paper or paperboard product comprising at least one ply containing high yield pulp and its production method

The present invention relates to a process for producing at least one ply of a paper or board product wherein a web comprising mechanical and/or chemimechanical pulp and at least one dry strength additive is dried in a press drying process by subjecting the web to heat and an overpressure of above 40 kPa. The present invention also relates to a paper product, a paperboard product and a ply produced according to the process.

Process for producing at least one ply of a paper or board and a paper or board produced according to the process

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Sundsvall, Sweden

Sven Norgren