Zero twist yarn having periodic flat spots
AssigneeOwens Corning Fiberglas Technology, Inc.
InventorRoy E. Smith
Life of this patent
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Abstract
A strand of individual filaments has a primary cross-sectional shape and periodic flat spots with a flat cross-sectional shape which is more elongated than the primary cross-sectional shape. The primary cross-sectional shape preferably has an aspect ratio within the range of from about 1:1 to about 6:1, and the flat cross-sectional shape preferably has an aspect ratio greater than about 6:1., with the period of the periodic flat spots being within the range of from about 0.2 to about 6 meters.
Claims10
A strand comprising a plurality of gathered glass-fiber filaments coated with a size, the strand having a primary cross-sectional shape with a cross-sectional height (1) and width (L), the primary cross-sectional shape being periodically interrupted by flat spots each having a flattened cross-sectional shape with a cross-sectional height (1') and width (L'), wherein:
- the width (L') of the flat spots is greater than the width (L) of the primary cross-sectional shape, whereby the cross-sectional shape of the flat spots is more elongated than the primary cross-sectional shape;
- the primary cross-sectional shape has an aspect ratio (L/1) ranging from about 1:1 to about 6:1;
- and the flat spots have an aspect ratio (L'/1') of at least 6:1.
Dependencies are inferred from the claim text.