| abstract |
A dental tape is constituted by a length of incipiently fibrillatable plastics film. The tape may be made by extruding a polypropylene film 4 in strip form onto a chilled take-off roller 5, and then roll embossing the film by means of rollers 10, 12. After embossing, the film is oriented by means of draw rollers 15, 17. Alternatively the extruded strip may be partly fibrillated with a spiked roller. <IMAGE> |