Abstract: A process for producing mica-containing insulating tape for windings of rotating high voltage electrical machinery which after winding under a vacuum and pressure can be impregnated with a solvent-free synthetic resin and then cured under the action of heat, a fiber-containing mica film which in addition to fine mica also has organic and/or inorganic fibers being sprinkled with an epoxy resin mixture in the form of a powder enamel and the side of the fiber-containing mica film which has been sprinkled with the powder enamel being cemented under pressure and at an elevated temperature to a carrier material.

Abstract: A process for producing impregnable fine mica tapes with a built-in accelerator which after winding onto the conductors of the windings of electrical machines are impregnated with a solvent-free impregnation resin and are then cured under the action of heat. The fine mica film is sprinkled with a powder epoxy resin system which contains a curing agent and the side of the fine mica film which has been sprinkled with the powder epoxy is cemented to a carrier material, the powder epoxy resin system curing under the influence of temperature.

Abstract: A description is given of a photovoltaic module (1) in the form of a laminate, which as the core layer exhibits a solar cell system (2) and encapsulation materials (3, 3′) applied on both sides of the latter. According to the invention, at least one encapsulation material layer (3′) consists of a sealing layer (4′) and a barrier layer (6), which consists of a plastic film or a plastic film composite, and on which an inorganic oxide layer (7) separated out to the vapor phase is present.

Abstract: The description relates to a laminate component consisting essentially of a highly elastic fibre-reinforced synthetic resin matrix which contains a) a laminate region with a bending E modulus of 10,000 to 40,000 MPa which can be made from several synthetic resin fibre prepregs hot-pressed together and thus hardened, b) connecting strips arranged on at least two opposite edges of the laminate region of soft elastic material which are bonded at the surface with the corresponding edges of the laminate region, and c) a decorative covering layer on one side of the laminate.

Abstract: A coating system comprised of a resin component, a hardening component and additives. The resin component contains (meth)acrylic double bonds and at least two reactive hydroxyl groups, and the hardening component is comprised of a multifunctional, at least bifunctional isocyanate. The proportions of resin and hardening component in the coating system are stoichiometric. The coating system is suitable for producing laminated sheets with a surface layer of progressively hardening polyurethane acrylate. During a first hardening stage, the free hydroxyl groups of the resin component cross-link with the isocyanate groups of the hardening component, forming a urethane acrylate prepolymer which contains (meth)acrylic double bonds. In the second hardening state, the (meth)acrylic double bonds continue to cross-link, forming the urethane acrylic polymer coating of the sheet surface.

Abstract: The invention concerns a plastics-paper composite which substantially consists of a paper layer, a polypropylene layer and a polyester layer, the polyester layer forming one of the two surface layers of the plastics-paper composite. This plastics-paper composite is used to produce weatherproof laminated sheets with surface protection, an acrylate layer being applied to the polyester layer of the plastics-paper composite. This composite is stacked on one or both sides with a plurality of papers impregnated with synthetic resin to form a stack, the acrylate layer lying against the outermost paper layer(s). This stack is then pressed at high pressure and high temperature. For use, the surface protection is removed from the acrylate layer as from the polyester layer.

Abstract: A halogen-free resin mixture comprising an epoxy resin, a hardener, a flame retardant as well as additives, a self-extinguishing prepreg composed of this resin mixture as well as its advantageous application, particularly as an insulation material. The halogen-free resin mixture being composed of:a) 20-60 weight % epoxy resin;b) 20-60 weight % phenolic novolak hardener;c) 5-65 weight % zinc borate as flame retardant; andd) 0-30 weight % additives.

Abstract: The invention concerns a process and equipment for manufacturing laminated photovoltaic modules, where (a) a module-stack (2) formed by the system of solar cells, the encapsulating materials and the separating foils is deposited at the loading station (1) and where (b) the module-stack (2) is moved into the vacuum laminator (5) which thereupon is closed and evacuated, and, by pressing the heater plate (21) against the thermally conductive carrier plate (3), said stack is heated to the softening point of the plastic sealing layers present in the encapsulating materials, and where (c) following airing of the vacuum laminator (5) the heater plate (21) is not cooled and the formed composite (2') is moved into the hardening oven (10) and where (d) the hardened laminate (2") is then moved into the cooling zone (12) and (e) is removed from the manufacturing process at the removal station (14). The process stages (a) through (e) of the invention are carried out simultaneously and parallelly in timed manner.

Abstract: The invention concerns a compressible prepreg based on flat substrates impregnated with thermosetting synthetic resins, characterized in that it comprises a first, C stage synthetic-resin layer directly deposited on the substrate and a second, B stage synthetic-resin layer deposited on the first synthetic-resin layer.

Abstract: A method for impregnating a flat, fibrous substrate penetrated by a low viscosity, fluid synthetic resin, the substrate web 1 being preheated by known device 2 and thereupon being made to pass over a friction roller 3 which is heated where called for and which is uniformly wetted at its surface 6 with the low viscosity, aqueous synthetic resin solution based on an aminoplastic resin, substantially a melamine resin 5 or based on a phenolformaldehyde resin 5' present in a bath, the low viscosity, aqueous synthetic resin solution being uniformly heated and at least part of it penetrating the surface of the substrate web 1, whereupon the substrate web 1 loaded with synthetic resin is fully impregnated in the bath 4.

Abstract: A thermally expanding laminate contains highly elastic reinforcing fibers, such as glass fibers, in the elastically compressed state, and a thermally softening, thermosetting plastic as a binder.In order to manufacture this laminate, first glass fiber mats are impregnated with a thermosetting plastic and thereupon one or more superposed mats are compressed in a press and raised to temperatures such that the plastic shall soften and the assembly then is cooled while still being compressed and while the plastic is solidifying to form the finished laminate.The expandable laminate preferably is used for electrically insulating spacers. Illustratively a laminate blank 4 is mounted between neighboring coil parts 5 of a stator of an electrical high-voltage machine.

Abstract: In order to produce the electric insulation of the winding of an electric machine, grooves having a cross-section that tapers at least in an area near to the groove opening are arranged in the rotor or motor. Before the winding is laid in the grooves, the latter are lined with a laminate that contains an elastically compressed mass of high-elastic, electrically insulating fibres and a solidified, curable synthetic resin that can still be thermally softened, however, and that holds the mass of fibres in its compressed state. Once the winding is laid and the grooves are closed, the rotor or stator is subjected to a vacuum pressure impregnation, then cured.

Abstract: A device for concealed, i.e. masked suspension of panels from loadbearing structures and consisting of two bent metal parts fastening into the panel is described, a U-shaped metal part 1, 1' being adjustably linked by an adjustment screw 3, 3' to a metal part 2, 2' so as to be mutually displaceable, the legs 1a, 1a'; 2a, 2a' of the metal parts 1, 1'; 2, 2' resting against each other and the two metal parts 1, 1'; 2, 2' resting flat by their other legs 1b, 1b'; 2b, 2b' against the panel 5, 5' and by their angled end zones 6, 6'; 7, 7' entering channels 8, 8'; 9, 9' milled into the panel and thereby ensuring positive locking to the panel 5, 5'.

Abstract: In a continuous process for the manufacture of aromatic polyesters by polycondensation of mono- or multi-nuclear substituted or unsubstituted diphenols, with halides of aromatic dicarboxylic acids according to the two-phase interface polycondensation process, the first step is to produce continuously a fine pre-emulsion with an organic solvent and from the aqueous phase, consisting of a solution obtained from the diphenols, of an alkaline hydroxide in order to form the diphenates and possibly of a phase transfer catalyst in water or in a mixture of water and of an organic solubilizer. This pre-emulsion is fed in quantities to a dispersion unit jointly with the organo-liquid phase forming the acid chloride solution.

Abstract: During the essentially continuous process for producing a polymer plastic, especially a foil or thin sheet (38) containing polymethyl methacrylate, a highly-viscous polymer plastic is first applied to a flat carrier inside a separating layer, whereby regions of the support surface remain free, in the manner of a surface pattern. Next a low-viscosity polymerizable monomer and/or pre-polymer (30) are cast on to this separating layer in such a way that it forms, over the separating layer, a liquid layer, onto which is applied a flat, thread-like support material (32), which may advantageously have a decorative surface and into which the support material (32) is then embedded or impressed. Next after the possible application of further layers consisting of high and/or low-viscosity plastic, especially inside a second separating layer, the thus produced material coating is transferred to the foil (38) or thin sheet, accompanied by polymerization of the plastics contained therein.

Abstract: A high pressure laminate comprising a plurality of heat molded sheets impregnated with duromeric synthetic resins characterized in that several of these sheets form on at least one surface of the laminate a heat-shapable surface layer (2,3) while the remaining sheets form a non-heat-shapable region which includes a core layer of the laminate.

Abstract: A repair laminate for the quick repair of lightweight panels used particularly in aircraft construction comprised of a lightweight core 2, e.g., in the form of a possibly pressed honeycomb structure, and two outer laminates 3,4, which repair laminate is comprised of a solid cured or thermoplastic layer of synthetic material 13 bonded on one side to a hot-melt adhesive 15 and optionally on the other side to a decorative liner-layer. The synthetic material layer 13 may advantageously be a glass-fabric reinforced phenol aldehyde resin and the liner-laminate may be a dyed polyvinyl fluoride film.

Abstract: A heat shapable resin laminate sheet, composed of several heat-bonded support webs impregnated with duroplastic binders, the deformation temperature to be utilized in shaping the laminate sheet being higher than the temperature utilized in molding it, which comprises a number of individual laminations, each of which is formed separately of one or more support webs impregnated with duroplastic binders and layers of thermoplastic binders arranged between the individual laminations, the melting point temperatures of the thermoplastic binders being equal to or lower than the deformation temperature, and a process of shaping the laminate sheet.

Abstract: A method for the continuous production of foam materials, wherein the foaming and/or foamed synthetic starting material is passed through the pressure zone (4) of a continuously operating press (1), and in which method at least a part of the heat required for foaming is produced in the synthetic starting material itself as dielectric heat of an electromagnetic high-frequency condenser field, wherein production of this heat in the starting material takes place at least to its greatest part within a high-frequency condenser field which is arranged in the direction of passage (8) of the material through the press (1) in front of the pressure zone (4), and that in order to supply additional heat into the foaming and/or foamed starting material or in order to prevent or delay its surface cooling, at least one of the electrodes (10, 11) between which prevails the high-frequency field and/or at least one of the pressure surfaces of the press may be heated.

Abstract: In a continuous process for the manufacture of aromatic polyesters by polycondensation of mono- or multi-nuclear substituted or unsubstituted diphenols, with halides of aromatic dicarboxylic acids according to the two-phase interface polycondensation process, the first step is to produce continuously a fine pre-emulsion with an organic solvent and from the aqueous phase, consisting of a solution obtained from the diphenols, of an alkaline hydroxide in order to form the diphenates and possibly of a phase transfer catalyst in water or in a mixture of water and of an organic solubilizer. This pre-emulsion is fed in quantities to a dispersion unit jointly with the organo-liquid phase forming the acid chloride solution.