COATED INORGANIC FILAMENTS AND THEIR PREPARATION

The invention relates to a coated filament comprising an inorganic filament and a polymer composition comprising a thermoplastic polymer, wherein the polymer composition is in direct contact with the filament and wherein the coated filament has a length of less than 100mm. In another aspect, the inv...

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Bibliographische Detailangaben
Hauptverfasser: BIEMOND, Gerard Jan Eduard, PICARD, Philipp Klaus Werner, GALLUCCI, Robert Russell, VERGHESE, Nikhil K. E, LIM, Shawn, SOLIMAN, Maria, BOVEN, Gert, DUCHATEAU, Robbert, RAVICHANDRAN, Pramod, DONNERS, Robert Maria Martin
Format: Patent
Sprache:eng ; fre
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Beschreibung
Zusammenfassung:The invention relates to a coated filament comprising an inorganic filament and a polymer composition comprising a thermoplastic polymer, wherein the polymer composition is in direct contact with the filament and wherein the coated filament has a length of less than 100mm. In another aspect, the invention relates to 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, preferably an uncoated glass filament; b. providing a molten polymer composition comprising a thermoplastic polymer; c. applying the molten polymer composition to the uncoated inorganic filament, preferably by using a roller die, curtain coater die or a slit die 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 100mm or e2 bundling a plurality of said coated filaments into a filament-bundle or a yarn and optionally cutting the filament bundle or yarn into pieces having a length of less than 100mm 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 500mm and wherein the tape has a length/width ratio of above 10. L'invention concerne un filament revêtu comprenant un filament inorganique et une composition polymère comprenant un polymère thermoplastique, la composition polymère étant en contact direct avec le filament et le filament revêtu ayant une longueur inférieure à 100 mm. Selon un autre aspect, l'invention concerne un filament revêtu, un faisceau de filaments ou un ruban pouvant être obtenu par un procédé de production d'un filament revêtu comprenant les étapes consistant à a. produire un filament inorganique non revêtu à partir d'une masse fondue inorganique, de préférence un filament de verre non revêtu ; b. fournir une composition de polymère fondu comprenant un polymère thermoplastique ; c. appliquer la composition de polymère fondu sur le filament inorganique non revêtu, de préférence à l'aide d'une matrice de rouleau, d'une matrice de revêtement de rideau ou d'une matrice