| 摘要 |
Core-sheath monofilaments have the following structure: (A) a (co)polyester (X) core with a m.pt. of 200 - 300 (220 - 285) degrees C and comprising at least 70 mol.% aromatic dicarboxylic acids (C) and aliphatic diols (D) (w.r.t. all polyester units) and max. 30 mol.% other dicarboxylic acids (C1), arylaliphatic dicarboxylic acids (C2) with min. 1 (1 - 2) (non-)condensed aromatic rings or 4-12 (6-10)C acyclic aliphatic dicarboxylic acids (C3) and other aliphatic diols (D1), 3-10 (3-6)C branched and / or long chain diols (D2), cyclic diols (D3), ether diols (D4) or even a v. small amt. of polyglycol (D5) having a mol. wt. of ca. 500 - 2,000; and (B) a sheath comprising a thermoplastic polyester (Y) with a m.pt. of 200 - 300 (220 - 285) degrees C and a thermoplastic elastomer copolyether ester (Z) contg. 40 - 60 wt.% long chain polyether diols (E) with a mean mol. wt. of 600 - 4,000 as soft segments. The yarns have a tensile strength of 0.8 - 6.5 (1.0 - 5.5) cN / tex and an extension at break of 300 - 1,200%. They may also contain standard non-polymer additives. Also claimed are: (i) the prepn. of the yarns; (ii) high mechanical and chemical resistance textiles, paper machine wires, spiral fabrics, screen printing blankets, industrial filter cloths and conveyor belts contg. these yarns; and (iii) the use of the yarns for making these textile prods.. |
