Nozzle for flash-extrusion apparatus

Details Nozzle for flash-extrusion apparatus Nozzle for flash-extrusion apparatus

1981-03-24

1982-10-05

Woo, Jay H.

Plastic article or earthenware shaping or treating: apparatus

Means applying electrical or wave energy directly to work

Electro-static or inductive field

264 22, 4253822, 425461, B28B 1700, D01D 300

Patent

active

043526500

ABSTRACT:
An improved nozzle is provided for the spinneret pack of an apparatus for flash-extruding a polymer solution to form a plexifilamentary strand. The improved nozzle contains a flared tunnel that is coaxial with and immediately downstream of the extrusion orifice. The tunnel, which has a minimum diameter that is at least four times the diameter of the orifice and a flare angle in the range of 10 to 35 degrees, permits increases in throughput without accompanying decreases in the tenacity of the plexifilamentary strand.

REFERENCES:
patent: 3081519 (1963-03-01), Blades et al.
patent: 3593074 (1971-07-01), Isakoff
patent: 3756441 (1973-09-01), Anderson et al.
patent: 3859031 (1975-01-01), Hawkins
patent: 4010229 (1977-03-01), Pleska et al.
patent: 4025593 (1977-05-01), Raganato et al.
patent: 4272463 (1981-06-01), Clark et al.

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