Plastic and nonmetallic article shaping or treating: processes – Forming continuous or indefinite length work – With crimping or crinkling of strands of filaments
Patent
1986-05-01
1988-04-26
Silbaugh, Jan H.
Plastic and nonmetallic article shaping or treating: processes
Forming continuous or indefinite length work
With crimping or crinkling of strands of filaments
264171, 2642102, 2642108, 26421114, D01D 5088, D01F 812
Patent
active
047403390
ABSTRACT:
Polyamide conjugate filaments are prepared by a spin-stretch process wherein two nylon 66 polymers having different relative viscosities are melt spun at a spinning speed of at least 2286 mpm to form filaments in which the polymers are arranged in a side-by-side configuration along the length of the filaments. The filaments are then stretched in-line at a stretch ratio greater than 1.0 prior to their being collected with said stretch ratio being selected to provide filaments having a high level of high-load crimp and a low level of boiling water shrinkage. The filaments are particularly useful in the construction of stretch garments and, especially, ladies' leg hose and pantyhose.
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Bach Hartwig C.
Black William B.
Lorin Hubert C.
Monsanto Company
Silbaugh Jan H.
Whisler John W.
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