US 11,702,778 B2
Self-crimped multi-component fibers and methods of making the same
Ralph A. Moody, III, Mooresville, NC (US); and Mehmet Selcuk Sinangil, Mooresville, NC (US)
Assigned to BERRY GLOBAL, INC., Evansville, IN (US)
Filed by Berry Global, Inc., Evansville, IN (US)
Filed on Sep. 27, 2019, as Appl. No. 16/585,833.
Claims priority of provisional application 62/738,353, filed on Sep. 28, 2018.
Prior Publication US 2020/0102672 A1, Apr. 2, 2020
Int. Cl. D04H 3/007 (2012.01); D04H 3/16 (2006.01); D01D 5/22 (2006.01); D01D 5/088 (2006.01); D01D 7/00 (2006.01); D04H 1/4382 (2012.01); D01F 8/06 (2006.01); D04H 1/4391 (2012.01)
CPC D04H 1/43828 (2020.05) [D01D 5/088 (2013.01); D01D 5/22 (2013.01); D01D 7/00 (2013.01); D01F 8/06 (2013.01); D04H 1/4383 (2020.05); D04H 1/43832 (2020.05); D04H 1/43835 (2020.05); D04H 1/43914 (2020.05); D04H 1/43918 (2020.05); D04H 3/007 (2013.01); D04H 3/16 (2013.01); D10B 2321/021 (2013.01); D10B 2321/022 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A self-crimped multi-component fiber (SMF), comprising:
(i) a first component comprising a first polymeric material, wherein the first polymeric material comprises a first melt flow rate (MFR) less than 50 g/10 min; the first polymeric material is formed from a blend of a first polyolefin fraction A consisting of a first polypropylene and having a melt flow rate-A (MFR-A) and a polyolefin fraction B consisting of a second polypropylene and having a melt flow rate-B (MFR-B); wherein the first polymeric material comprises from 0.5 to 12% by weight of the second polypropylene and a MFR-ratio between MFR-B and MFR-A is from 15:1 to 100:1; and
(ii) a second component comprising a second polymeric material, wherein the second component is formed from a polyethylene; wherein
the SMF comprises one or more three-dimensional crimped portions.