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US 7,118,698 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.
Claims41
A process comprising the steps of:
- supplying a fluidized mixture having at least two components at a pressure greater than atmospheric pressure to a rotor spinning about an axis at a rotational speed, the rotor having at least one material-issuing nozzle comprising an opening therein along the periphery of the rotor;
- issuing the fluidized mixture from the opening of the nozzle at a reduced pressure relative to that in the supplying step to form an issued material at a material issuance speed;
- vaporizing or expanding at least one component of the issued material to form a fluid jet;
- and
- transporting the remaining component(s) of the issued material away from the rotor by the fluid jet.
2 more elements
Dependencies are inferred from the claim text.