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:
Feb. 24, 2026
Filed:
Feb. 15, 2021
T.en Zimmer Gmbh, Frankfurt am Main, DE;
Stefan Deiß, Harxheim, DE;
Raimund Schwarz, Taunusstein, DE;
Karl-Heinz Heldmann, Raunheim, DE;
Martin Baumert, Hammersbach, DE;
Eva-Maria Kamp, Frankfurt, DE;
T.EN ZIMMER GMBH, Frankfurt am Main, DE;
Abstract
A method for the production of polyamide 6 pellets. The method includes, among other things, providing a melt of polyamide 6, feeding the melt into an underwater pelletizing system being operated with a fluid and producing pellets from the melt, transporting the pellets from the underwater pelletizing system with the fluid into an upper side of a vertical vessel having a cylindrical section and a tapered bottom section connected to a pipe comprising a screw and/or a rotary gate valve for conveying the pellets, and extracting of cyclic dimers and oligomers from the pellets, where the fluid is circulated between the underwater pelletizing system and the vertical vessel wherein a fraction thereof is withdrawn from circulation and the residual amounts of fluid leaving the vertical vessel with the pellets via the pipe and the withdrawn fraction are replenished with fresh fluid.