Process for producing at least one ply of a paper or paperboard product and a paper or paperboard product

The present invention relates to a process for producing at least one ply of a paper or paperboard product which process comprises the steps of; subjecting cellulosic fibers to heat treatment wherein the fibers are treated at a high dry content and at an increased temperature, preparing a slurry com...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	Räsänen, Jari, Pynnönen, Janne
Format:	Patent
Sprache:	eng
Schlagworte:	APPARATUS THEREFOR IMPREGNATING OR COATING OF PAPER LAYERED PRODUCTS LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM PAPER NOT OTHERWISE PROVIDED FOR PAPER-MAKING PERFORMING OPERATIONS PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D PRODUCTION OF CELLULOSE PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCESFROM CELLULOSE-CONTAINING MATERIALS PULP COMPOSITIONS REGENERATION OF PULPING LIQUORS TEXTILES TRANSPORTING TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G
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Beschreibung
Zusammenfassung:	The present invention relates to a process for producing at least one ply of a paper or paperboard product which process comprises the steps of; subjecting cellulosic fibers to heat treatment wherein the fibers are treated at a high dry content and at an increased temperature, preparing a slurry comprising said heat treated fibers, forming a web of said slurry and, dewatering said web whereby a ply of said product is formed. The present invention further relates to a paper or paperboard product produced according to the process.