Polypropylene fiber and preparation thereof

D - Textiles – Paper – 01 – F

Patent

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Details

D01F 6/58 (2006.01) D01F 6/06 (2006.01)

Patent

CA 2372453

Disclosed is a polypropylene fiber, which is obtained from an isotactic polypropylene homopolymer with an isotactic index of 90 to 99 % through melt-spinning or through drawing after melt- spinning, and shows two differential scanning calorimeter (DSC) endothermic peaks between 155 and 170 °C. When being thermally bonded with one another, the fibers are made into non-woven fabrics which have excellent strength in addition to being soft. A high quality of the non-woven fabrics can be produced in high speed carding machines with high yields.

L'invention concerne une fibre de polypropylène, laquelle est obtenue à partir d'un homopolymère de polypropylène isotactique ayant un indice isotactique de 90 à 99 % par filage par fusion ou par étirage après filage par fusion, et présente deux crêtes endothermiques de calorimètre à balayage différentiel (DSC) entre 155 et 170 DEG C. Lorsqu'elles sont liées thermiquement les unes aux autres, les fibres sont transformées en tissu non tissé présentant une excellente résistance en plus d'être doux. Une haute qualité de tissu non tissé peut être produite dans des cardeuses rapides avec des rendements élevés.

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