Morphologically stable bulked continuous filaments and methods and systems for making the same
AssigneeHoneywell International Inc.
InventorsOtto M. Ilg, Randall A. Sferrazza
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Abstract
Morphologically stable BCF yarns, and the methods and systems for making such BCF yarns are provided. More specifically, the BCF yarn is melt-spun, drawn and textured. The yarn texturizing includes a relatively low efficiency fluid jet texturizer, that is a fluid jet texturizer operating at a sufficiently low fluid jet velocity and a sufficiently high fluid jet temperature to obtain a yarn skein shrinkage of less than about 0.50 inch, more preferably about 0.25 inch or less. Most preferably, the BCF yarns are formed of nylon-6 and exhibit an alpha-crystalline content of less than about 45%, and usually between about 45% to about 55%.
Claims16
A method for making yarns of bulked continuous filaments (BCF) comprising the steps of:
- (a) melt-spinning a polymeric material to form multiple filaments thereof followed sequentially by
- (b) drawing and texturing the filaments to form the yarns of BCF, wherein
- (c) said step of texturing the filaments includes operating a fluid jet texturizer at a sufficiently low fluid jet velocity and a sufficiently high fluid jet temperature to obtain a yarn skein shrinkage of less than about 0.50 inch.
A nylon-6 yarn comprised of bulked continuous filaments (BCF) exhibiting a yarn skein shrinkage of less than about 0.50 inch, and alpha-crystalline contents in the BCF of at least about 45%.
A system for making yarns of bulked continuous filaments comprising:
- a spinning head for melt-spinning a polymeric material to form multiple filaments thereof;
- a draw zone downstream of said spin head for drawing the melt-spun filaments;
- and
- a texturing unit downstream of the draw zone for texturing the melt-spun, drawn filaments;
- wherein
- the texturing unit includes a fluid jet texturizer operable at a sufficiently low fluid jet velocity and a sufficiently high fluid jet temperature to obtain a yarn skein shrinkage of less than about 0.50 inch.
Dependencies are inferred from the claim text.