Abstract: EMI shielding materials in form of plates, panels, and fabrics and methods for their preparation and for preparing highly filled ferromagnetic fibers therefore are described. In the method the ferromagnetic filler is treated in an ultrasonic dispenser or a ball mill in the presence of a binder polymer and then the fiber is made by wet spinning from a dispersion containing solution or gel of the polymer.

Abstract: An apparatus for production of dewatered and loosened biopulp, wherein precrushed raw biopulp is press fed by pistons (2) against a pair of counter-rotating press rolls (4, 5) between which the biopulp is dewatered. The pulp is then fed into a backpressure vessel (7) maintained at an overpressure, which prevents water from entering the backpressure vessel and remoistening the biopulp. The biopulp leaves the backpressure vessel through an air-tight compartment feeder (9) constructed like a revolving door. The press rolls include one of solid metal (5) and another (4) with a number of elastically mounted plates which can move radially in response to a radial load.

Abstract: A method for the production of highly comminuted flour of wood and other types of vegetable biomass suitable for the use as fuel, in that coarsely ground wood or other type of coarsely ground vegetable biomass is treated with a dilute solution of an alkaline substance, and subsequently exposed to elevated temperatures, whereafter the treated coarsely ground material is subjected to grinding, whereby a finely divided powder with a narrow particle size distribution is obtained.

Abstract: A pressure generating device for use in injection moulding at a high pressure or normal pressure where the pressure generating device is attached to the mould, the platens, the tie bars or other suitable parts of the injection moulding machine which device operates separately from the normal pressure generating mechanism and acts on the content of the mould cavity only, said device comprising a pressure generating part, e.g. a hydraulic cylinder (1) connected with a plunger (2) which can bring the pressure inside the cavity to the desired level during an injection cycle and a non-return flow valve (3) or any other element closing the mold cavity from the injection side, and the use of said device in injection moulding at high pressure or normal pressure.

Abstract: A method to produce composites based on cellulose or lignocellulosic materials and plastics according to which method the cellulose or lignocellulose material is subjected to a pre-hydrolytic or other chemically degrading treatment prior to or during the compounding or processing step whereby a comminution and improved dispersion of the cellulose or lignocellulose material in the plastic phase is achieved.

Abstract: A process for producing injection moulded parts having markedly improved mechanical strength properties is described wherein a blend of high molecular polyethylene having high density with a matrix material which consists of a polymeric material with which the high molecular polyethylene has a limited compatibility is injection moulded at high injection moulding pressures exceeding 250 MPa, whereby a fibre reinforced injection moulded article having improved mechanical properties is produced.

Abstract: The invention relates to a process for producing injection moulded articles having highly improved mechanical properties of polyethylene having very high molecular weight and high density with the use of elevated pressure exceeding 250 MPa which process is characterized in that the injection moulding is carried out with the simultaneous use of an elevated mould temperature between 40.degree. and 125.degree. C.

Abstract: A continuous process for preparation of a multilayer film from thermoplastic material comprising processing in an extruder, feeding into a film blowing die having several concentric slots, stretching, blowing, bonding and winding up wherein the layers are bonded together when the exterior layer has been oriented to the desired extent in the longitudinal direction by stretching and the interior layer in the transverse direction by blowing by means of gas medium and, optionally, in the longitudinal direction by stretching, but before any of the material layers has been cooled to a temperature which corresponds to the frost point of the material in question and otherwise before any of the material has lost its viscous flowability, and wherein one or more interior layers may be used.Furthermore, an apparatus for the performance of the above process is provided by means of which a double layer film is prepared.

Abstract: A method of reducing internal stresses in and improving the mechanical properties of injection molded articles made of thermoplastic resins is disclosed wherein under in other respects normal injection molding conditions thermoplastic resins are injection molded at high injection and holding pressures within the range 250-800 MPa.

Abstract: A process and apparatus for separating and recovering polystyrene from polystyrene containing material wherein the polystyrene containing material is contacted with liquid sulfur dioxide wherein the polystyrene is dissolved and the system polystyrene-sulfur dioxide forms two phases, an upper phase which contains the polystyrene and a lower phase which contains the sulfur dioxide solvent which is practically free from polystyrene and which can be reused in the process, the polystyrene is recovered from the upper polystyrene containing phase by boiling off the sulfur dioxide, which if desired is returned to the process, optionally after removing low molecular portions of polystyrenes.

Abstract: A continuous process for preparation of a multilayer film from thermoplastic material comprising processing in an extruder, feeding into a film blowing die having several concentric slots, stretching, blowing, bonding and winding up wherein the layers are bonded together when the exterior layer has been oriented to the desired extent in the longitudinal direction by stretching and the interior layer in the transverse direction by blowing by means of gas medium and, optionally, in the longitudinal direction by stretching, but before any of the material layers has been cooled to a temperature which corresponds to the frost point of the material in question and otherwise before any of the material has lost its viscous flowability, and wherein one or more interior layers may be used.Furthermore, an apparatus for the performance of the above process is provided by means of which a double layer film is prepared.

Abstract: A continuous process for preparation of a multilayer film from thermoplastic material comprising processing in an extruder, feeding into a film blowing die having several concentric slots, stretching, blowing, bonding and winding up wherein the layers are bonded together when the exterior layer has been oriented to the desired extent in the longitudinal direction by stretching and the interior layer in the transverse direction by blowing by means of gas medium and, optionally, in the longitudinal direction by stretching, but before any of the material layers has been cooled to a temperature which corresponds to the frost point of the material in question and otherwise before any of the material has lost its viscous flowability, and wherein one or more interior layers may be used.Furthermore, an apparatus for the performance of the above process is provided by means of which a double layer film is prepared.