Method of making thick-and-thin fibers

Details Method of making thick-and-thin fibers Method of making thick-and-thin fibers

1981-07-20

1983-06-21

Woo, Jay H.

Plastic and nonmetallic article shaping or treating: processes

Forming continuous or indefinite length work

Of varying cross-sectional area or with intermittent...

264178F, 2642102, 2642108, 2642888, D01D 520

Patent

active

043893643

ABSTRACT:
Disclosed is a method of making a thick-and-thin fiber or fibers, wherein the fineness thereof changes gradually and periodically along the longitudinal direction thereof. The method comprises (1) a step wherein molten fiber forming polymer is extruded through spinneret holes at a constant throughput, (2) a step wherein the extruded filaments run through a short gaseous gap whose length is in the range of 0.1 to 6 millimeters before they plunge into liquid for abrupt solidification by cooling, (3) a step wherein the solidified undrawn filaments are touched by at least one vibrating substance before being withdrawn at a constant speed, (4) a step wherein the undrawn filaments are drawn by some roller systems, and (5) a step wherein the drawn filaments are thermally set.

REFERENCES:
patent: 2370112 (1945-02-01), Truitt
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patent: 3116197 (1963-12-01), Kasey, Jr.
patent: 3691748 (1972-09-01), Buzano
patent: 3905381 (1975-09-01), Meyer
patent: 3930106 (1975-12-01), Mihara et al.
patent: 4059950 (1977-11-01), Negishi et al.
patent: 4201813 (1980-05-01), Brumlik
patent: 4265849 (1981-05-01), Borenstein

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