Patent ID: 6163918
Filing Date: 2000-12-26
Classification: A46D,B29C,D01F,Y10S,Y10T

Abstract:
Method for the manufacture of surface-structured bristle material from plastic comprising the steps of extruding a monofilament, in which with a thermally melted first thermoplastic material forming the main component of the monofilament is admixed, before or during extrusion, a granular material of a second thermoplastic material the abrasiveness of which is at most the same as that of the first thermoplastic material, which has a higher thermal strength than that of the first thermoplastic material, wherein the granular material is surface-welded to the surrounding first thermoplastic material during said extruding, and stretching the monofilament, wherein the particle size of the granular material is such that during said stretching, in cross-sections where there is little or no granular material, the monofilament is subject to a greater transverse contraction than in cross-sections with a large amount of granular material to structure the outside of the circumferential surface of the monofilament with a non-uniform, varying cross-sectional shape and size.