Abstract: Method for manufacturing a multi-layered mat formed by means of fibers, strands, yarns or twists, a multi-layered mat manufactured according to the method and/or a molded article manufactured therefrom, as well as an apparatus for carrying out the method.

Abstract: Light filler material consists of a bonded, woven or knitted, short- or long-fibered material web into which thermoplastic hollow microglobes are embedded. This voluminized fiber web is compressed by means of a sewing or stitch-bonding process with the aid of pre-tensioned sewing threads. In the process, the hollow spaces between the voluminized microglobes are reduced in an exactly calculable form by the adjustable thread tension.

Abstract: A lightweight filler containing a non-woven fabric of substantially two-dimensionally oriented spun fibers which are loosened up and held together by microspheres of plastic material. For manufacturing the lightweight fillers, particles of the unexpanded first stage of microspheres in the form of an aqueous suspension are suspended in a two-dimensionally oriented spun non-woven fabric, the so-obtained material is dried and heated to a temperature necessary for expanding the particles and for the required period of time.