Process of making staple fibers

Details Process of making staple fibers Process of making staple fibers

2003-12-10

2009-08-25

Tentoni, Leo B (Department: 1791)

Plastic and nonmetallic article shaping or treating: processes

Forming continuous or indefinite length work

With crimping or crinkling of strands of filaments

C264S210500, C264S210700, C264S210800, C264S211140, C264S211170, C264S234000

Reexamination Certificate

active

07578957

ABSTRACT:
Improved staple fibers and processes for producing them are provided. The processes are particularly useful for forming staple fibers from poly(trimethylene terephthalate), especially carpet staple fibers. The processes include prewetting undrawn yarns and drawing the fibers under wet and warm conditions, thermo-fixing the texture, and drying at relatively low temperatures. Fibers produced according to the processes disclosed herein have improved properties and reduced brittleness as compared to fibers prepared using conventional processes.

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