Hollow trilobal cross-section filaments

Details Hollow trilobal cross-section filaments Hollow trilobal cross-section filaments

D - Textiles, Paper

01

D

D01D 5/24 (2006.01) D01D 5/253 (2006.01)

Patent

CA 2164210

This invention relates to a trilobal filament having at least one axially extending void, preferably one axially extending void in each lobe, wherein each lobe has a composite curve profile having a first arm angle .alpha. and a second arm angle .beta., the cross-section has a modification ratio of 2.4 to 5.0, and the total cross-sectional area is 5 to 15 percent void. In a further aspect, this invention is a spinnerette for producing a filament comprising at least one bore group, wherein the bore group has three legs divergent from each other by 130° to 150° and each leg includes two substantially parallel capillary sections and one nipple capillary section which extends to the outermost point of each leg.

Cette invention se rapporte à un filament trilobé présentant au moins un vide axial, de préférence un vide axial dans chaque lobe, chaque lobe présentant un profil en courbe composite comportant un premier angle de bras alpha et un second angle de bras beta , la section présentant un rapport de modification compris entre 2,4 et 5,0, et la surface de section totale étant constituée de 5 à 15 % de surface vide. Selon un autre aspect, cette invention se rapporte à une filière permettant de produire un filament et comprenant au moins un groupe de passages, le groupe de passages présentant trois pieds divergeant de 130 DEG à 150 DEG les uns par rapport aux autres, et chaque pied comprenant deux sections capillaires sensiblement parallèles ainsi qu'une section capillaire en pointe qui s'étend jusqu'à l'extrémité externe de chaque pied.

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