Abstract: The invention relates to a manufacturing method for hollow components using a tubular film (1) and a mould (3) having the following steps: feeding a plastic material in the area of an inner surface (4a, 4b) of the mould (3), conforming the material to the inner surface (4a, 4b) of the mould (3), feeding a tubular film (1) into the mould (3) so that the material is positioned between an outer surface of the tubular film (1) and the mould (3), expanding the tubular film (1) using pressure and/or a vacuum, applying a pressure (p) above atmospheric pressure and/or heating the mould so that the material is partly or completely melted and is adapted to conform to an inner contour of the mould (3) and an outer contour of the expanded tubular film (1).

Abstract: The present invention relates to a device for molding by impregnation of at least one reinforcing layer constituting a piece to be molded or at least one reinforcing layer covering a piece, with a resin in liquid form, said device comprising a mold extending around the reinforcing layer by defining a resin circulation space, an end piece for supplying resin in the circulation space, an end piece for evacuating the surplus resin as well as means for generating a flow of resin in the circulation space. According to the invention, the mold comprises a flexible conduit and means for mechanically deforming said flexible conduit to shape the circulation space according to the impregnation parameters.

Abstract: A device for producing a multi-component compound, in particular for dental purposes, by mixing its components after they have been pressed out of cartridges which open into a dynamic mixer and are arranged exchangeably in the device, with a first motor for advancing all of the pistons assigned to the cartridges, and with a second motor for rotary driving of mixing elements in the mixer via a shaft, which is held in engagement with the mixer by spring pretensioning and can be pulled back from the mixer counter to the spring pretensioning, is characterized in that the shaft is provided with a radially extending projection which, by the spring pretensioning, is pressed onto a ramp-like upwardly sloping cam surface, which is provided on its foot with an abutment surface, of a toothed wheel, which is provided with saw-like teeth and is coaxial to the shaft, which toothed wheel, in a first angle direction in which the cam surface slopes upwards, is prevented from rotating by a catch and, in the second angle positi

Abstract: The invention relates to a polyether polyol composition for the preparation of polyurethane foams, comprising: (a) a polyether polyol having a hydroxyl functionality of 2, an OH number within a range of from 50 to 65 mg of KOH/g and a proportion of primary hydroxyl groups within a range of from 40 to 80%, based on the total number of primary and secondary hydroxyl groups, having a PO content of from 45 to 55% by weight and an EO content of from 40 to 55% by weight; (b) a dispersion of a polymer in a polyether polyol, wherein the OH number of the dispersion is within a range of from 10 to 30 mg of KOH/g and the polyether polyol has a hydroxyl functionality of 3, a proportion of primary hydroxyl groups within a range of from 70 to 90%, based on the total number of primary and secondary hydroxyl groups, a PO content of from 70 to 90% by weight and an EO content of from 10 to 30% by weight; (c) a polyether polyol having a hydroxyl functionality of 3, an OH number within a range of from 220 to 290 mg of KOH/g a

Abstract: The present invention provides a process for the production of polyurethane foams from A1 compounds which contain hydrogen atoms which are reactive towards isocyanates and have a molecular weight of 400-15,000, A2 optionally compounds which contain hydrogen atoms which are reactive towards isocyanates and have a molecular weight of 62-399, A3 water and/or physical blowing agents, A4 optionally auxiliary substances and additives, such as a) catalysts which differ from component A5, b) surface-active additives, c) pigments or flameproofing agents, A5 at least one tin(II) salt of carboxylic acids, the carboxylic acid having from 10 to 16 carbon atoms, and B di- or polyisocyanates, wherein the resulting polyurethane foams have low emission values and a good resistance to ageing.

Abstract: A method for producing a component made of fibre-reinforced plastic by impregnating a fibre mould-blank (11) with a liquid impregnating material (10), includes at least the following steps: a) placing the fibre mould-blank (11) into a cavity (2) of a mould tool (1) while generating a temporary free space (9) between the fibre mould-blank (11) and at least one interior surface (19) of the mould tool (1); b) feeding the impregnating material (10) into this free space (9); c) closing the free space (9) by narrowing the mould tool (1) so that the impregnating material (10) is displaced from the free space (9) into the fibre mould-blank (11). It is further developed in that the mould tool (1) is gradually subjected to locally different forces (F1; F2; F3; . . . Fn, Fa; Fb; Fc) which locally cause the free space (9) to be closed. A mould tool (1) is also described.

Abstract: A device for producing a multi-component compound, in particular for dental purposes, by mixing its components after they have been pressed out of cartridges which open into a dynamic mixer and are arranged exchangeably in the device, with a first motor for advancing all of the pistons assigned to the cartridges, and with a second motor for rotary driving of mixing elements in the mixer via a shaft, which is held in engagement with the mixer by spring pretensioning and can be pulled back from the mixer counter to the spring pretensioning, is characterized in that the shaft is provided with a radially extending projection which, by means of the spring pretensioning, is pressed onto a ramp-like upwardly sloping cam surface, which is provided on its foot with an abutment surface, of a toothed wheel, which is provided with saw-like teeth and is coaxial to the shaft, which toothed wheel, in a first angle direction in which the cam surface slopes upwards, is prevented from rotating by a catch and, in the second ang

Abstract: The present invention provides a process for producing polyurethane foams from (A1) compounds with a molecular weight of 400-15,000 exhibiting hydrogen atoms that are reactive towards isocyanates, (A2) optionally, compounds with a molecular weight of 62-399 exhibiting hydrogen atoms that are reactive towards isocyanates, (A3) water and/or physical blowing agents, (A4) optionally, auxiliary substances and additives, (A5) compounds with at least one carbonamide group and one nitrile group, and (B) diisocyanates or polyisocyanates, which results in polyurethane foams with lowered emission of formaldehyde and wherein the activity of the raw-material mixture is not significantly influenced and wherein the mechanical properties of the resulting foam (in particular, compression set and ageing behaviour under humid conditions) are not influenced negatively.

Abstract: The method and the device for producing a multicomponent compound, in particular for dental purposes, is characterized in that the drives of the pistons of cartridges are initially moved with a higher speed until air pockets in the cartridges are eliminated and said cartridges are filled only with the component, and in that the feed speed is then reduced to constant values with which the components can be pressed out.

Abstract: The present invention relates to polyether polyol compositions containing renewable raw materials, a process for preparing visco-elastic polyurethane foams using such compositions, correspondingly prepared visco-elastic foam materials, and the use thereof.

Abstract: The invention relates to a highly flexible sheet composite material comprising a block flexible foam and a layer of whipped foam made of polyurethane-based dispersions two-dimensionally bonded thereto, a process for preparing such a composite material, and the use thereof.

Abstract: The present invention concerns a floor covering, such as a carpet, containing a first textile planar element and a first layer which is at least partially connected to the first textile planar element over their surfaces, wherein the first layer contains viscoelastic polymer foam. The floor covering according to the invention is characterized in that the first textile planar element has a modulus of elasticity of ?0.5 N/mm2 to ?2.5 N/mm2, that in the first layer 1 the viscoelastic polymer foam has a compression load deflection at 40% compression of ?1 kPa to ?10 kPa and that in the first layer the viscoelastic polymer foam has a hysteresis when determining the compression load deflection at 40% compression of ?20% to ?70%. The present invention also relates to a method of manufacturing a floor covering.

Abstract: The method and the device for producing a multicomponent compound, in particular for dental purposes, is characterized in that the pressing-out process, at the beginning thereof, is carried out at a reduced pressure.

Abstract: The present invention relates to PIPA polyols, to a process for the preparation of these PIPA polyols, and to a process for the production of highly elastic flexible polyurethane foams from these PIPA polyols.

Abstract: The present invention is directed to a process for the manufacture of three-dimensional acoustically sound automotive insulation parts. In particular, the process includes mixing a two component polyurethane resin, applying the resin to a substrate, molding the substrate and then trimming and demolding the resin applied substrate.

Abstract: The present invention provides flexible polyurethane foams with bulk densities less than about 15 kg/m3 and compressive strengths less than about 1.5 kPa and a process for producing these foams. The inventive foams are produced where polyisocyanates are reacted with special polyol mixtures in combination with high amounts of water and carbon dioxide dissolved under elevated pressure as the blowing agent.

Abstract: Flexible polyurethane foams that satisfy the requirements of FMVSS 302 are produced by reacting a polyisocyanate with a polyol component that includes: (1) from 90 to 99 parts by weight of a polyether polyol having an OH value of from 20 to 200 mg KOH/g and functionality of from 2 to 4 and (2) from 1 to 10 parts by weight of a polyether ester polyol having an OH value of from 150 to 450 mg KOH/g and a functionality of from 2 to 3 in the presence of a blowing agent, catalyst and stabilizer. The foams thus produced are useful as cushioning for furniture and automotive applications.

Abstract: The present invention is directed to a process for the manufacture of three-dimensional acoustically sound automotive insulation parts. In particular, the process includes mixing a two component polyurethane resin, applying the resin to a substrate, molding the substrate and then trimming and demolding the resin applied substrate.

Abstract: The present invention is directed to a process for the manufacture of three-dimensional acoustically sound automotive insulation parts. In particular, the process includes mixing a two component polyurethane resin, applying the resin to a substrate, molding the substrate and then trimming and demolding the resin applied substrate.

Abstract: The present invention is directed to a process for the manufacture of three-dimensional acoustically sound automotive insulation parts. In particular, the process includes mixing a two component polyurethane resin, applying the resin to a substrate, molding the substrate and then trimming and demolding the resin applied substrate.