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US 7,621,731 B2Granted
Rotary process for forming uniform material
AssigneeE.I. du Pont de Nemours and Company
InventorsJack Eugene Armantrout, Lewis Edward Manring, Robert Anthony Marin, Larry R. Marshall
Life of this patent
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Abstract
A process is provided for issuing material from a nozzle in a rotor rotating at a given rotational speed wherein the material is issued by way of a fluid jet. The material can be collected on a collector concentric to the rotor. The collector can be a flexible belt moving in the axial direction of the rotor. The collected material can take the form of discrete particles, fibers, plexifilamentary web, discrete fibrils or a membrane.
Claims3
An apparatus for rotational spinning comprising:
- a rotor body;
- at least one nozzle within the rotor body having an inlet for receiving a fluidized mixture at above ambient temperature and pressure, and an outlet in fluid communication with the inlet, the outlet opening to the outer periphery of the rotor, wherein the nozzle further comprises:
- a letdown chamber;
- a letdown orifice intermediate the inlet and the letdown chamber;
- and a spin orifice intermediate the letdown chamber and the outlet and directly connected to the letdown chamber;
- and a porous cylindrical collector disposed concentrically around said rotor body.
3 more elements
Dependencies are inferred from the claim text.