Self-crimping conjugate filament and seamless band formed...

D - Textiles – Paper – 01 – F

Patent

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Details

D01F 8/06 (2006.01) D01F 8/10 (2006.01) D01F 8/16 (2006.01) D04H 1/50 (2006.01) D04H 1/58 (2006.01)

Patent

CA 2259177

Side-by-side conjugate filaments made from thermoplastic elastomers and spunbond-type polypropylenes exhibit an extremely high propensity to self- crimp. At appropriate polymer ratios and processing conditions (with mechanical or aerodynamical drawing) the crimp develops spontaneously after relaxation of the attenuation force. The amount of crimp and the degree of elastic properties depend on the elastomer content and the processing conditions. The resulting crimp is typically in the range of 25-200 crimps per inch. This combination of exceptionally high crimp and an elastomer component imparts stretch and recovery properties. The filaments can be wrapped around a cylindrical supporting structure to create a continuous, seamless elastic band, useful for body-fit articles.

Des filaments conjugués disposés côte à côte, constitués d'élastomères thermoplastiques et de polypropylènes de type filé-lié, ont une très grande tendance à friser spontanément. Avec des rapports entre les polymères et des conditions de traitement appropriés (étirage mécanique ou aérodynamique), la frisure apparaît spontanément après relaxation de la force d'atténuation. L'ampleur de la frisure et le degré de propriétés élastiques dépendent de la teneur en élastomères et des conditions de traitement. Généralement, l'ampleur de la frisure résultante est comprise entre 25 et 200 par pouce. Cette combinaison d'une frisure exceptionnellement importante et d'un composant élastomère donne des propriétés d'extensibilité et de récupération aux filaments. Ceux-ci peuvent être enroulés autour d'une structure support cylindrique, de sorte qu'une bande élastique continue sans couture, utile pour les articles moulant le corps soit formée.

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