Making a fibrillated synthetic-resin strand

专利名称：Making a fibrillated synthetic-resin strand发明人：Karl-Heinz Banke,Elisabeth Hering,Wilfried

Lobel,Dieter Pollack,Gunter Wiedemann,UteGrell,Ingo Schuler

申请号：US06/367071申请日：19820409公开号：US04438053A公开日：19840320

摘要：A fibrillated strand is made by a method wherein first a mass of a powder of ahigh polymer is compressed into a substrate having a density smaller than that of thehigh polymer and having a multiplicity of gas- filled voids. Then an intense heat beam isplayed on the substrate to melt the high-polymer powder and simultaneously heat thegas of the voids to explosively enlarge same while the beam and substrate are relativelydisplaced so that the substrate is melted along a path. The substrate is cooled at least atthe path after irradiation by the beam to form a porous strand extending along the pathin the substrate. This strand is separated from the substrate and is then at least uniaxiallystretched. The beam is a CO.sub.2 TEM.sub.oo -mode laser beam and the method furthercomprises the step of focussing the laser beam on the substrate. The fused strand of thesubstrate is cooled so rapidly that it is normally not melted all the way through from topto bottom and from side to side. The rapid cooling of the strand prevents the strandfrom coalescing back into a smooth monofilament.

申请人：FORSCHUNGSINSTITUT FUER TEXTILTECHNOLOGIE

代理人：Karl F. Ross,Herbert Dubno

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