Vacuum spinning of fasciated yarn from sliver

Details Vacuum spinning of fasciated yarn from sliver Vacuum spinning of fasciated yarn from sliver

D - Textiles, Paper

01

H

118/27, 118/33

D01H 5/28 (2006.01) D01H 1/115 (2006.01)

Patent

CA 1317169

ABSTRACT A fasciated yarn suitable for making apparel fabric and having properties approaching that of ring spun yarn is produced by vacuum spinning, including directly from sliver. The elongated hollow shaft (20) of the vacuum spinning apparatus has a vacuum reservoir (32), or interior chamber, that is generally in the shape of a right circular cone, and the interior passageway (31) of the shaft from the first end (21) thereof to the interior chamber can have the form of a right circular cone frustum. The peforations (40) operatively connected to the interior chamber have a generally wedge-shape. The perforations and the passageway sections between the first end of the shaft and the perforations are dimensioned so that they allow sufficient air flow to achieve optimum fiber wrapping action. The fasciated yarn comprises vacuum spun yarn consisting of fibers including core fibers and wrapper fibers, the wrapper fibers being predominantly individual fibers although having some groups of wrapper fibers. The groups of wrapper fibers appear as non-uniform, non-consistent groups and provide a relatively smooth appearance. The wrapper fibers are wrapped at a helix angle of about 30° (e.g. about 30-50°), and about 20-30 percent of the fiber mass comprises the wrapper fibers. The wrappers are essentially devoid of auger or corkscrew appearance. The core fibers are essentially parallel staple fibers. Initial threading of the vacuum spinning apparatus is provided by a vacuum tube (745) mounted for rotation about an axis parallel to and spaced from the axis of rotation of the shaft, the vacuum tube being connected up to a vacuum reservoir (742) and source of vacuum (728) and rotatable from an inoperative to an operative position.

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