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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.:

US 11920268 B1

PDFFull Text
Date of Patent:
Mar. 05, 2024

Filed:

May. 18, 2022

System and process for preparing polylactic acid nonwoven fabrics

Applicants:

Fitesa Germany Gmbh, Peine, DE;

Fitesa Simpsonville, Inc., Simpsonville, SC (US);

Inventors:

Gary Drews, Greenville, SC (US);

Elena Novarino, Hannover, DE;

Jason Hamilton, Peine, DE;

Alfredo Izzo, Peine, DE;

David Dudley Newkirk, Greer, SC (US);

Assignees:

Fitesa Simpsonville, Inc., Simpsonville, SC (US);

Fitesa Germany GMBH, Peine, DE;

Attorney:
Primary Examiner:

Jeffry H Aftergut

Int. Cl.
CPC ...
D04H 3/16 (2006.01); B29C 43/00 (2006.01); B29C 43/24 (2006.01); B29C 71/04 (2006.01); D01D 5/08 (2006.01); D01D 5/098 (2006.01); D01D 5/32 (2006.01); D01D 5/34 (2006.01); D01F 6/62 (2006.01); D01F 6/92 (2006.01); D01F 8/14 (2006.01); D04H 3/009 (2012.01); D04H 3/011 (2012.01); D04H 3/14 (2012.01); D04H 3/147 (2012.01); D06M 14/32 (2006.01); B29K 67/00 (2006.01); B29K 105/08 (2006.01); B29L 31/00 (2006.01); D01D 10/00 (2006.01);
U.S. Cl.
CPC ...
D04H 3/16 (2013.01); B29C 43/003 (2013.01); B29C 43/24 (2013.01); B29C 71/04 (2013.01); D01D 5/08 (2013.01); D01D 5/098 (2013.01); D01D 5/32 (2013.01); D01D 5/34 (2013.01); D01F 6/625 (2013.01); D01F 6/92 (2013.01); D01F 8/14 (2013.01); D04H 3/009 (2013.01); D04H 3/011 (2013.01); D04H 3/14 (2013.01); D04H 3/147 (2013.01); D06M 14/32 (2013.01); B29K 2067/046 (2013.01); B29K 2105/08 (2013.01); B29L 2031/726 (2013.01); D01D 5/0985 (2013.01); D01D 10/00 (2013.01);
Abstract

A system for preparing a polylactic acid (PLA) spunbond nonwoven fabric is provided. In particular, the system includes a first PLA source configured to provide a stream of molten or semi-molten PLA resin; a spin beam in fluid communication with the first PLA source, the spin beam configured to extrude and draw a plurality of PLA continuous filaments; a collection surface disposed below an outlet of the spin beam onto which the PLA continuous filaments are deposited to form the PLA spunbond nonwoven fabric; a first ionization source positioned and arranged to expose the PLA continuous filaments to ions; and a calender positioned downstream of the first ionization source.

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