Polyolefin composition containing low viscosity propylene...

C - Chemistry – Metallurgy – 08 – L

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C08L 23/12 (2006.01) D01F 6/46 (2006.01) D04H 3/00 (2006.01) D04H 3/16 (2006.01) C08L 23/08 (2006.01) C08L 23/10 (2006.01) C08L 53/00 (2006.01)

Patent

CA 2381333

A polyolefin composition which contains 45 to 5 weight percent of a low viscosity propylene homopolymer having an as polymerized melt flow rate of 250 to 550 g/10 minutes and 55 to 95 weight percent of an olefin polymer composition, preferably a random copolymer of propylene and ethylene and/or a C4-10 alpha-olefin or mixtures thereof, containing from 90 to 99 weight percent propylene. The composition may be formed into fibers having a diameter of from 15 to 23 microns. The fibers may be used to produce nonwoven fabrics.

L'invention concerne une composition polyoléfinique qui contient de 45 à 5 % en poids d'un homopolymère de propylène à faible viscosité présentant à l'état polymérisé un taux de fluidité de 250 à 550 g/10 minutes, et de 55 à 95 % en poids d'une composition à base de polymères d'oléfines, de préférence un copolymère statistique de propylène et/ou d'éthylène et/ou d'une alpha-oléfine C¿4-10? ou de mélanges de ces derniers, contenant de 90 à 99 % en poids de propylène. Ladite composition peut être utilisée pour former des fibres ayant un diamètre de 15 à 23 microns. Ces fibres peuvent être utilisées pour la production de non-tissés.

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