D - Textiles – Paper – 01 – F
Patent
D - Textiles, Paper
01
F
D01F 8/12 (2006.01)
Patent
CA 2208493
Novel bicomponent fibers have a polyamide domain and an amorphous non-fiber-forming polymer domain which is embedded entirely within, and thereby completely surrounded by, the polyamide domain. The preferred bicomponent fibers have a sheath-core structure wherein the polyamide domain constitutes the sheath and the amorphous non-fiber-forming polymer constitutes the core. Surprisingly, even though the core is formed of a non-fiber-forming polymer, the bicomponent fibers exhibit properties which are comparable in many respects to fibers formed from 100% polyamide. Preferably, the fibers are concentric sheath-core bicomponent fibers having a nylon sheath and a core formed from polystyrene, polyisobutene and poly(methyl methacrylate). Polystyrene, and particularly atactic polystyrene, is preferred as the amorphous polymer domain.
Nouvelles fibres bicomposantes possédant un domaine polyamide et un domaine polymérique amorphe ne formant pas la fibre qui est noyé entièrement dans le domaine polyamide et, par conséquent, entièrement entouré par ce dernier. Les fibres bicomposantes de choix ont une structure de type gaine-âme dans laquelle le domaine polyamide constitue la gaine et le polymère amorphe ne formant pas la fibre constitue l'âme. Etonnamment, même si l'âme est formée d'un polymère ne formant pas la fibre, les fibres bicomposantes se caractérisent par des propriétés qui sont comparables à bien des égards à celles des fibres de polyamide à 100 %. Les fibres sont, de préférence, des fibres bicomposantes concentriques de type gaine-âme ayant une gaine de nylon et une âme de polystyrène, de polyisobutène et de poly(méthacrylate de méthyle). Le polystyrène, et particulièrement le polystyrène atactique, sont jugés préférables comme domaine polymérique amorphe.
Bristow James R.
Hoyt Matthew B.
Kent Diane R.
Basf Corporation
Honeywell International Inc.
Robic
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