| 摘要 |
Poly(trimethylene terephthalate) is formed into a bulk continuous filament yarn by a process including:(a) melt-spinning poly(trimethylene terephthalate) at a temperature within the range of about 240 to about 280° C. to produce a plurality of spun filaments;(b) cooling the spun filaments;(c) converging the spun filaments into a yarn;(d) drawing the yarn at a first draw ratio within the range of about 1.01 to about 2 in a first drawing stage defined by at least one feed roller and at least one first draw roller, each of said at least one feed roller operated at a temperature less than about 100° C. and each of said at least one draw roller heated to a temperature greater than the temperatures of said at least one feed roller and within the range of about 50 to about 150° C.;(e) subsequently drawing the yarn at a second draw ratio of at least about 2.2 times that of the first draw ratio in a second drawing stage defined by said at least one first draw roller and at least one second draw roller, each of said at least one second draw roller heated to a temperature greater than said at least one first draw roller and within the range of about 100 to about 200° C.; and(e) winding the drawn yarns, after optionally texturing the drawn yarns.The invention process enables the production of poly(trimethylene terephthalate)-based carpet having the bulk and resiliency of nylon as well as the stain resistance and low static generation of polyester.
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