Plastic and nonmetallic article shaping or treating: processes – Forming continuous or indefinite length work – Of varying cross-sectional area or with intermittent...
Patent
1985-01-31
1985-12-31
Czaja, Donald
Plastic and nonmetallic article shaping or treating: processes
Forming continuous or indefinite length work
Of varying cross-sectional area or with intermittent...
264103, 264168, 264177F, 264342RE, D01D 520
Patent
active
045620296
ABSTRACT:
Polyester polymer is extruded at different speeds through groups of parallel closely spaced orifices at relatively high spinning speeds. The resulting filament have high and low shrinkage regions substantially regularly spaced apart along their length. A yarn including a number of these filaments spontaneously develops crimp when relaxed.
REFERENCES:
patent: 3219739 (1965-11-01), Breen et al.
patent: 3914488 (1975-10-01), Gorrafa
patent: 4332757 (1982-06-01), Blackmon et al.
patent: 4332758 (1982-06-01), Blackmon et al.
patent: 4351147 (1982-09-01), Blackmon et al.
Bodenheimer, Jr. S. M.
Celanese Corporation
Czaja Donald
Lorin Hubert C.
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