Thermotropic aromatic polyester(amide) monofilament
AssigneeMichelin Recherche et Technique S.A.
InventorsPhilippe Esnault, Jean-Claude Aubry
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Abstract
An as-spun monofilament of thermotropic aromatic polyester(amide), which satisfies the following conditions: D≧40; Te>45; ΔL≧0, D being its diameter (in μm), Te its tenacity (in cN/tex) and ΔL its variation in length (in %) after 2 minutes at 235±5° C. at an initial tension of 0.2 cN/tex. A spinning process for obtaining such a monofilament, including, upon emergence from the spinneret, of structuring the flow of the polymer by stretching in a layer of gaseous fluid for a predetermined time which is a function of the diameter D, before thermally quenching the flow of polymer thus structured in a liquid, so as to solidify it.
Claims19
An as-spun monofilament of thermotropic aromatic polyester(amide), characterized in that it satisfies the following conditions:
- 80≦D≦230;
- Te>45;
- ΔL≧0, D being its diameter or thickness (in μm), Te its tenacity (in cN/tex) and ΔL its variation in length (in %) after 2 minutes at 235±5° C. at an initial tension of 0.2 cN/tex.
Dependencies are inferred from the claim text.