Filament having a quadrilobate exterior cross-section and a four-sided void

A synthetic polymer filament is characterized by a four-sided void that extends centrally and axially through the filament. Each apex of the void extends toward the approximate midpoint of one side of the exterior configuration of the filament. The four-sided void has a modification ratio in the range from about 1.2 to about 2.0 and occupies from about five percent 5% to about thirty percent 30% of the cross sectional area of the filament.A spinneret plate for producing the thermoplastic synthetic polymer filament has a cluster of four orifices centered about a central point. Each orifice includes a generally isosceles triangle-shaped major portion from which extends a pair of legs, each leg of one orifice being spaced from the leg of an adjacent orifice to define a gap therebetween.

POLYAMIDE FIBERS SPONTANEOUSLY FRISTING

Procédé pour préparer des fibres mono-constituant à frisure spontanée, par filage à l'état fondu d'un polymère de polyhexaméthylène adipamide ou de polycaproamide afin de former des filaments, refroidissement brusque de ceux-ci par courant d'air, mouillage à l'eau des filaments et étirage de ceux-ci, on refroidit les filaments à une température superficielle moyenne de 40 à 130 degrés environ par un courant d'air transversal d'une vitesse moyenne de moins de 3 m/s ; on applique aux filaments, alors qu'ils sont à cette température superficielle, une quantité efficace d'un liquide aqueux ; et l'on étire les filaments à un taux d'au moins 1,3:1 afin de leur donner une ténacité d'au moins 1,3 g/denier, un allongement à la rupture de pas plus de 120 % et la capacité, quand on les soumet à un traitement de relaxation à chaud, de développer une frisure d'allure hélicoïdale s'inversant fréquemment. Application en filature. (CF DESSIN DANS BOPI) Process for preparing mono-component fibers with spontaneous crimping, by spinning in the molten state of a polymer of polyhexamethylene adipamide or of polycaproamide in order to form filaments, sudden cooling of the latter by air current, wetting with water. water of the filaments and drawing thereof, the filaments are cooled to an average surface temperature of about 40 to 130 degrees by a transverse air current with an average speed of less than 3 m / s; applying to the filaments, while they are at this surface temperature, an effective amount of an aqueous liquid; and stretching the filaments at a rate of at least 1.3: 1 to give them a tenacity of at least 1.3 g / denier, an elongation at break of not more than 120% and the capacity , when subjected to a heat relaxation treatment, to develop a frequently reversing helical crimp. Application in spinning. (CF DRAWING IN BOPI)

Filament having a quadrilobate exterior cross-section and a four-sided void

A synthetic polymer filament is characterized by a four-sided void that extends centrally and axially through the filament. Each apex of the void extends toward the approximate midpoint of one side of the exterior configuration of the filament. The four-sided void has a modification ratio in the range from about l.2 to about 2.0 and occupies from about five percent 5% to about thirty percent 30% of the cross sectional area of the filament. A spinneret plate for producing the thermoplastic synthetic polymer filament has a cluster of four orifices centered about a central point. Each orifice includes a generally isosceles triangle-shaped major portion from which extends a pair of legs, each leg of one orifice being spaced from the leg of an adjacent orifice to define a gap therebetween.

Filament having a trilobal cross section and a trilobal void

Fibre poliammidiche ad auto arricciamento.

Filament having a triangular cross section and 3 or 6 axially extending voids

Triangular thermoplastic polymer filaments having 3 or 3 pairs of axially extending voids located along the convex sides of the filament and spinneret plates for producing such filaments.

Filament having a triangular cross-section and 3 or 6 axially extending voids

Polystyren enthaltende elektrisch leitende Fäden und Verfahren zur Herstellung von antistatischen Garnen.