Melt spinning process for polymeric filaments

Details Melt spinning process for polymeric filaments Melt spinning process for polymeric filaments

1986-04-30

1991-07-23

Lorin, Hubert C.

Plastic and nonmetallic article shaping or treating: processes

Direct application of fluid pressure differential to...

Production of continuous or running length

2642102, 2642108, 26421114, 425 722, D01D 5084, D01D 5098

Patent

active

050341820

ABSTRACT:
A melt-spinning process for spinning polymeric filaments at a spinning speed controlled by a positive mechanical withdrawal means that increases the speed of the filaments to above 7,000 meters/minute whereby a drawing and necking down of the filaments occur below the spinning pack, directing a gas into a zone extending from the spinning pack to a location between the spinning pack and the withdrawal means, maintaining the zone under superatmospheric pressure of less than 0.03 kg/cm2 and increasing the velocity of the gas as it leaves the zone to a level greater than the velocity of the filaments to reduce the extent of necking down of the filaments.

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Fiber World, Sep. 1984, pp. 8-12.

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