METHOD OF PRODUCING COMPRESSED LAYERED STRUCTURES

A method of manufacturing a fiberboard or a similar wood-based product. The method comprises providing a lignocellulosic material, contacting the lignocellulosic material with an activating agent to produce a modified lignocellulosic material containing free radicals, forming the modified material i...

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Bibliographische Detailangaben
Hauptverfasser:	JONI KUNNAS, PIA QVINTUS-LEINO, JAAKKO LAINE, PETRI WIDSTEN, SIMO TUOMINEN
Format:	Patent
Sprache:	eng
Schlagworte:	APPARATUS THEREFOR FIBREBOARD MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUTORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTINGOF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL MANUFACTURE OF ARTICLES FROM CELLULOSIC FIBROUS SUSPENSIONS ORFROM PAPIER-MACHE NAILING OR STAPLING MACHINES IN GENERAL PAPER-MAKING PERFORMING OPERATIONS PRODUCTION OF CELLULOSE PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCESFROM CELLULOSE-CONTAINING MATERIALS REGENERATION OF PULPING LIQUORS TEXTILES TRANSPORTING WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL
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Beschreibung
Zusammenfassung:	A method of manufacturing a fiberboard or a similar wood-based product. The method comprises providing a lignocellulosic material, contacting the lignocellulosic material with an activating agent to produce a modified lignocellulosic material containing free radicals, forming the modified material into a layered structure, and pressing the layered structure into a compressed product. According to the invention a modified lignocellulosic material is produced which contains for softwood fibers, at least 0.7x10 or, for hardwood fibers, at least 3x10 free radicals/g of lignocellulosic material. By pressing the layered structure a compressed product is obtained having an internal bonding of at least 0.7 MPa.