prov:value
| - The invention accordingly provides fibers which comprise at least one cycloolefin copolymer which can be prepared by polymerization of from 30 to 99.9% by weight, based on the total amount of monomers, of at least one symmetrical, polycyclic olefin of the formula I, II, III, IV, V or VI in which R1, R2, R3, R4, R5, R6, R7 and R8 are identical or different and are a hydrogen atom, a C6-C16-aryl or
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