The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 08, 1980
Filed:
Oct. 31, 1977
Giovanni Di Drusco, Milan, IT;
Deoscaride Zaffagnini, S. Biagio, IT;
Montedison S.p.A., Milan, IT;
Abstract
There is disclosed an improvement in the production of microfibers or fibrils of synthetic thermoplastic polymeric materials by flash-spinning solutions, emulsions or suspensions of the synthetic polymers in solvents, under the action of a high-speed jet of gaseous or vaporous fluid having an angular direction with respect to the solution, emulsion or suspension being flash-spun. The improvement consists in causing the fluid jet to expand through a nozzle (or duct) of the convergent-divergent type and in extruding the polymer solution, emulsion or dispersion under flash conditions at an angle towards the fluid jet in expansion in the divergent portion of the nozzle.