Coated inorganic filaments and their preparation

A coated filament, filament bundle or tape obtainable by a method for producing a coated filament comprising the steps of

• a. producing an uncoated inorganic filament from an inorganic melt;
• b. providing a molten polymer composition comprising a thermoplastic polymer;
• c. applying the molten polymer composition to the uncoated inorganic filament and allowing the molten polymer composition to solidify and
• d. obtaining a coated filament comprising an inorganic filament which is coated with the polymer composition and wherein the inorganic filament is in direct contact with the polymer composition and
• e1. cutting the coated filament into pieces having a length of less than 100 mm or
• e2 bundling a plurality of said coated filaments into a filamentbundle or a yarn and optionally cutting the filament bundle or yarn into pieces having a length of less than 100 mm or
• f. bundling a plurality of said coated filaments into a filamentbundle or a yarn and
• g. producing a tape from the filamentbundle or from the yarn to produce a tape having a thickness from 0.2 up to and including 2 mm, a width from 10 up to and including 500 mm and wherein the tape has a length/width ratio of above 10.