摘要:
A method for producing foamed mouldings comprises the steps of providing a mould (1) and introducing a foam-forming reaction mixture (6) into the mould (1), wherein the foam-forming reaction mixture (1) is introduced into the mould (1) under constant injection pressure and in a quantity which is variable over time. The introduced quantity of the foam-forming reaction mixture is changed over time by varying the output of a pump motor acting on the reaction mixture.
摘要:
The invention relates to a composite material made of a layer of inorganic, non-metal material and a sandwich element, and to a method for producing said composite material.
摘要:
The present invention relates to a method for the production of layers and moulded parts consisting of reactive plastic, the reactive components being intermixed on a plurality of planes with the aid of mixed gases. The invention further relates to a device which allows a corresponding method.
摘要:
The invention relates to a method for producing a flameproof polyurethane (PUR) spray foam, especially a rigid PUR spray foam, to a spray foam body so produced and to the use thereof for heat insulation.
摘要:
The invention relates to a process for the production of fiber-reinforced composite components in which an outer film is bonded with a layer containing fiber-reinforced polyurethane, characterised in that a) first an elastic intermediate layer which has a modulus of elasticity of 0.5 MPa to 50 MPa and a thickness of 0.3 mm to 6 mm, is applied to the outer film which has a thickness in the range of 0.2 mm to 5 mm, and then b) at least one other layer is applied to the back of the intermediate layer, at least one layer containing fiber-reinforced polyurethane being applied.
摘要:
A process for the production of ballast for railway track laying, road construction, dam construction and bank protection, wherein ballast stones are spread out to form ballast and a reaction mixture for the preparation of a polyurethane foam, produced from components by a low-pressure process, is applied between the spread ballast stones.
摘要:
A process for the production of ballast for railway track laying, road construction, dam construction and bank protection, wherein ballast stones are spread out to form ballast and a reaction mixture for the preparation of a polyurethane foam, produced from components by a low-pressure process, is applied between the spread ballast stones.
摘要:
The invention relates to a process for the production of fibre-reinforced composite components in which an outer film is bonded with a layer containing fibre- reinforced polyurethane, characterised in that a) first an elastic intermediate layer which has a modulus of elasticity of 0.5 MPa to 50 MPa and a thickness of 0.3 mm to 6 mm, is applied to the outer film which has a thickness in the range of 0.2 mm to 5 mm, and then b) at least one other layer is applied to the back of the intermediate layer, at least one layer containing fibre-reinforced polyurethane being applied.
摘要:
The invention relates to a fibre-reinforced polyurethane moulded part which has structures such as ribs, struts or domes, said structures being likewise fibre-reinforced.
摘要:
The invention relates to a device and a process for the preparation of polyurethane composite materials reinforced by fibers or solid particles, comprising at least one PUR spray-mixing head with a defined spraying direction and at least one application means for the directional application of fibers and/or solid particles, characterized in that the exiting direction of the fibers and/or solid particles can be changed in space relative to the spraying direction of the PUR spray-mixing head.