Abstract: The invention relates to a process for the manufacture of polyurethane foamed plastics which are formed by adding the polyurethane reactants to a solution of salts which decompose upon the exothermic polymerization reaction of said reactants to give off nitrogen gas which in turn foams the resultant polyurethane plastic.

Abstract: In order to provide a method for the discharge of a mixture of foamed material, more particularly for a thermal insulating material, by means of a mixing head for at least two reactive compounding ingredients in the low-pressure process, comprising a tube in which an agitator rotates at high speed, a mixing head for performing the method and an insulating material fabricated according to the method is proposed according to which the mixture ready for reaction is discharged by centrifugal force and distributed onto a substrate, in order to fully react and foam thereon, and a mixing head for performing the method. A thermal insulating material fabricated hereby is characterized in that the insulating materials are laminated onto a carrier web in the form of a sealing layer and in that the strips of insulating material possess a cuneiform cross-section.

Abstract: The invention relates to a double belt moulding machine for producing foamed plastic plates as a continuous strand. Two endless conveyor belts are moved in opposite rotation directions. The belts can be in the form of straps, steel strips, plate belts, etc., which are each guided over one drive pulley or drive sprockets in the case of plate belts, support elements in the form of slideways or slide rails and a guide pulley or sprocket. According to the invention the drive pulleys or sprockets for the two belts are provided with individual electric drives regulated to synchronize of the facing belt sections. Thus, destructive shear forces within the foam strand in the mould channel are avoided.

Abstract: In order to provide a thermal insulation material as insulating and sealing layer for roof areas which can be used as sole roofing element for the roof areas, which can be applied on larger areas at a time and in which the disadvantages of the known solution such as the formation of buckling wrinkles and blistering are avoidable, a thermal insulation material is provided as insulating and sealing layer for roof areas which makes it possible to cover larger areas of several square meters at a time, comprising strips of insulation material bonded onto a substrate web, in which case the strips of insulation material (120) are bonded onto a suitable sheet web as a sealing layer (130) in such a way that the thermal insulation material is constructed as insulating and sealing layer so that, when it is laid, it will not be necessary to lay an additional sealing layer.