US 11,674,248 B2
Nonwoven fabrics comprising polylactic acid having improved strength and toughness
Elena Novarino, Hannover (DE); Gary Drews, Greenville, SC (US); Jason Hamilton, Peine (DE); Stephen Chester, Simpsonville, SC (US); Alfredo Izzo, Peine (DE); and David D. Newkirk, Greer, SC (US)
Assigned to Fitesa Germany GmbH, Peine (DE); and Fitesa Simpsonville, Inc., Simpsonville, SC (US)
Filed by Fitesa Germany GmbH, Peine (DE); and Fitesa Simpsonville, Inc., Simpsonville, SC (US)
Filed on Jan. 13, 2022, as Appl. No. 17/574,768.
Application 17/574,768 is a continuation of application No. 15/676,163, filed on Aug. 14, 2017, granted, now 11,441,251.
Claims priority of provisional application 62/375,648, filed on Aug. 16, 2016.
Prior Publication US 2022/0136156 A1, May 5, 2022
Int. Cl. D04H 3/009 (2012.01); D04H 3/011 (2012.01); D01F 8/14 (2006.01); D01F 1/10 (2006.01); D01F 6/62 (2006.01); D04H 3/147 (2012.01); A61F 13/15 (2006.01); A61F 13/51 (2006.01); D01D 5/38 (2006.01); D01D 7/00 (2006.01); D04H 3/16 (2006.01); D01D 5/098 (2006.01)
CPC D04H 3/009 (2013.01) [A61F 13/15707 (2013.01); A61F 13/51 (2013.01); D01D 5/38 (2013.01); D01D 7/00 (2013.01); D01F 1/10 (2013.01); D01F 6/625 (2013.01); D01F 8/14 (2013.01); D04H 3/011 (2013.01); D04H 3/147 (2013.01); D04H 3/16 (2013.01); A61F 2013/15959 (2013.01); A61F 2013/51004 (2013.01); A61F 2013/51028 (2013.01); D01D 5/0985 (2013.01)] 21 Claims
OG exemplary drawing
 
1. A nonwoven fabric comprising a plurality of fibers that are bonded to each other to form a coherent web, wherein the fibers comprise a hydrophobic polymeric blend of a biobased aliphatic polyester and at least one secondary alkane sulfonate.