Melt spinning process

Details Melt spinning process Melt spinning process

1977-03-22

1978-05-23

Woo, Jay H.

Plastic and nonmetallic article shaping or treating: processes

Forming continuous or indefinite length work

Shaping by extrusion

425397, 425382R, B28B 2154

Patent

active

040910652

ABSTRACT:
The ability to maintain a constant differential between modification ratios of trilobal filaments under cospinning conditions is provided by spinning a filament of lower modification ratio through a spinneret orifice consisting of three radially intersecting tapered slots and a filament of a higher modification ratio through a spinneret orifice configured as three radially intersecting reverse-tapered slots. The orifices configured as three radially reverse-tapered slots provide a high modification ratio with low sensitivity to normal spinning process fluctuations which in combination with orifices having tapered slots for filaments of lower modification ratio facilitate maintenance of a more constant differential in modification ratios between the filaments.

REFERENCES:
patent: 2939201 (1960-06-01), Holland
patent: 3220173 (1965-11-01), Pitzl
patent: 3746827 (1973-07-01), Martin et al.
patent: 4001369 (1977-01-01), Shah

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