Abstract: A process for producing a layered material in sheet or membrane form from thermoplastic foam is described. The laminated material is suitable in particular for use as a drainage sheet or membrane. To produce the membrane, the thermoplastic foam in the form of strips, lengths, shreds or the like is piled up to form a layer of uniform height and compressed and compacted at a temperature below the softening temperature of the foam. Subsequently, the compressed and compacted layer of thermoplastic foam is perforated and fused with the aid of pins which are heated to a temperature of 400.degree. to 800.degree. C., whereupon the perforated and fused layer is cooled while maintaining the compression.

Abstract: A sound-insulated flow duct is provided with walls made up of a composite of an elastic thermoplastic, predominantly closed-cell foam material as the outer layer and an open-cell, elastic soft foam material as the inner layer.

Abstract: A machine installation for the manufacture of a thick-walled insulating pipe of elastic, laminatable foamed synthetic resin sheet material, includes an apparatus for effecting the lamination of a foamed synthetic resin sheet material to form a multilayer insulating pipe having a length corresponding to the sheet width of the sheet of foam material and a finishing unit. The laminating apparatus has an expandable and rotatable mandrel equipped with a pneumatic expanding means and an infinitely variable drive mechanisms for rotating the mandrel to wrap the sheet material thereon, and a pressure roller which can be urged against the mandrel. The roller is movable pneumatically by a telescopic holder, and the mandrel is associated with a pivotably mounted burner and a cutter.

Abstract: An adhesive interior or dome lining is provided for the interior of a vehicle roof with the central portion of the dome lining being adhesively secured to the roof while free edges of the dome lining are inserted into the gap formed between the roof and the interior roof strut. A profiled member of a soft foam material is provided adjacent the gap with the free end of the dome lining passing over the profiled member to be clampingly engaged into the gap by the compressive forces of the foam material. A method for installing this arrangement is further provided.