D - Textiles – Paper – 01 – F
Patent
D - Textiles, Paper
01
F
D01F 8/14 (2006.01)
Patent
CA 2173039
Described are monofilaments with a core-sheath structure comprising a core of a thermoplastic polyester or copolyester and a sheath comprising a thermoplastic polyester, wherein the polyester or copolyester of the core has a melting point of 200 to 300°C, preferably of 220 to 285°C, and includes at least 70 mol%, based on the totality of all polyester structural units, of structural units derived from aromatic dicarboxylic acids and from aliphatic diols, and not more than 30 mol%, based on the totality of all polyester structural units, of dicarboxy- lic acid units which differ from the aromatic dicarboxy- lic acid units which form the predominant portion of the dicarboxylic acid units, and diol units derived from aliphatic diols and which differ from the diol units which form the predominant portion of the diol units, and the sheath comprises a polyester mixture comprising a thermoplastic polyester whose melting point is between 200 and 300°C, preferably 220 and 285°C, and a thermo- plastic, elastomeric copolyether-ester with or without customary nonpolymeric additives. Also described are a process for producing the core- sheath monofilaments and their use in or for making textile sheet materials of high mechanical and chemical resistance.
Bereskin & Parr Llp/s.e.n.c.r.l.,s.r.l.
Johns Manville International Inc.
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