Abstract: A method for the production of particle boards by addition of a hydrophobing agent and a curable glue to wood based particles, shaping of the particle mass and subsequent curing of the glue by application of pressure and heat. The quality of the board is increased by keeping the hydrophobing agent heated above its melting temperature in the presence of the particles before the gluing.

Abstract: A method for producing board materials of cellulose containing components using formaldehyde-based curable glues. By treatment of at least one part of the components at a low moisture content with a formaldehyde absorbing agent the board materials obtained after pressing get a low content of free formaldehyde and very good strength properties. The moisture content of the components at the treatment is lower than 12 percent by weight. the formaldehyde absorbing agent is preferably urea.

Abstract: A board of cellulose containing components using formaldehyde-based curable glues. By treatment of at least one part of the components at a low moisture content with a formaldehyde absorbing agent the board obtained after pressing get a low content of free formaldehyde and very good strength properties. The moisture content of the components at the treatment is lower than 12 percent by weight. The formaldehyde absorbing agent is preferably urea.

Abstract: Unbleached sulphae fibres are chemically separated from other fibres by the use of high molecular polyalkylene oxides, preferably polyethylene oxide. The polyalkylene oxides are added to aqueous suspensions of fibre mixtures and hereby flocculates unbleached sulphate fibres in a selective manner and the flocks can be separated by known methods such as sedimentation, flotation, filtration etc. Use of polyalkylene oxides for selective flocculation of unbleached sulphate fibres gives the possibility of upgrading for example recovered fibres, broke and secondary fibre raw materials.

Abstract: A hardener composition for precondensates or liquid resins containing resorcinol and formaldehyde or resorcinol-phenol and formaldehyde and a method for glueing by using them. The hardener composition contains powdered paraformaldehyde suspended in a suspending agent that includes a precondensate of ketone and formaldehyde, which precondensate preferably contains water as a dilution media.

Abstract: An apparatus for finishing shaped articles which includes a working table, a finishing tool and movable mounting on said table for moving a shaped article toward and away from said finishing tool.

Abstract: This invention relates to a device for handling and transporting bundles of large sheets.

Abstract: The present invention relates to a new process for preparation of lignin resin, i.e., thermosetting resin based on lignin, particularly from sulfite waste liquor, which resin for example can be used as a binder in particle board.