YARN FILAMENT AND METHOD FOR MAKING SAME
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United States of America Patent
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Issued Date -
Dec 26, 2013
app pub date -
Jun 20, 2013
filing date -
Jun 20, 2012
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Abstract
This invention relates to a trilobal filament having at least one axially extending void, preferably one elongated void in each lobe, wherein each lobe has a partial elliptical-shaped profile having a major axis to minor axis of between about 1.04:1 to about 1.12:1, the cross-section has a modification ratio of 1.7 to 2.2, and the total cross-sectional area is 7 to 13 percent void. In a further aspect, this invention is a spinnerette for producing a filament comprising at least one bore group. Each bore group having three leg sections that are divergent from each other by 100° to 130° and each leg section includes two substantially parallel long leg capillary sections extending to an end section having a shoulder that extends inwardly toward a central axis of the long leg capillary sections.
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