Process for the manufacture of short fibrils and devices for car

Details Process for the manufacture of short fibrils and devices for car Process for the manufacture of short fibrils and devices for car

1976-11-17

1978-03-28

Spicer, Jr., Robert L.

Plastic article or earthenware shaping or treating: apparatus

Means making particulate material directly from liquid or...

425461, 425DIG49, 4253822, D01D 500

Patent

active

040812260

ABSTRACT:
A process is provided for the manufacture of fibrils of short length by suddenly releasing the pressure acting on a two-phase liquid mixture of molten polymer and solvent and which is at a high pressure and a high temperature. The two-phase liquid mixture is ejected through a pressure release orifice so as to vaporize the solvent instantaneously and solidify the polymer, and the flow path of the two-phase liquid mixture is perturbed at the instant when it enters the pressure release orifice.
Spinnerets are provided which have a perturbation chamber containing a supply orifice and a pressure release orifice.

REFERENCES:
patent: 2508462 (1950-05-01), Marshall
patent: 3227794 (1966-01-01), Anderson et al.
patent: 3285592 (1966-11-01), Ueda et al.
patent: 3490516 (1970-01-01), Basche et al.
patent: 3885014 (1975-05-01), Fukada et al.

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