Process for the manufacture of fibrils

Details Process for the manufacture of fibrils Process for the manufacture of fibrils

1977-07-01

1978-11-14

Woo, Jay H.

Plastic and nonmetallic article shaping or treating: processes

With severing, removing material from preform mechanically,...

To form particulate product

264140, 264DIG47, 264147, C08G 5112, B24D 300

Patent

active

041255844

ABSTRACT:
Centrifugal spinning apparatus is provided for the manufacture of fibrils from hot viscous hydrocarbon solutions of olefin polymers having an intrinsic viscosity of at least 3.5. The apparatus consists of an impeller which rotates at high speed in a cylindrical cavity having a discharge port. The impeller has a plurality of blades whose narrow dimensions lie substantially in the plane of the impeller's rotation and whose tips come in close proximity to the inner peripheral surface of the cylindrical cavity. The blades are arranged in at least two substantially-identical sets. Within each set, the blades are offset substantially equidistant from one another, both in the rotational plane of the impeller and in the plane transverse thereto. Two inlet ports are provided in the peripheral surface of the cylindrical cavity to feed liquids to the cylindrical cavity, each of which port is narrow in a plane transverse to the plane of the impeller's rotation and extends over substantially the entire peripheral surface. The inlet ports are positioned near the discharge port of the cylindrical cavity and upstream thereof viewed with respect to the impeller's rotation, so that the bulk of the liquids entering the cavity from the inlet ports are swept away from the discharge port by the impeller's rotation.

REFERENCES:
patent: 2021837 (1935-11-01), Davidson
patent: 3070835 (1963-01-01), Alsys
patent: 3400189 (1968-09-01), Nacke
patent: 3414640 (1968-12-01), Garetto et al.
patent: 3529936 (1970-09-01), Muller-Rid et al.
patent: 3846529 (1974-11-01), Poteet

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