US 12,000,071 B2
Method of making a nonwoven fiber web, nonwoven fiber web, and multi-component fiber
Petra L. Kohler Reidi, Minneapolis, MN (US); Saurabh Batra, Minneapolis, MN (US); Hannah C. Cohen, St. Paul, MN (US); Semra Colak Atan, St. Louis Park, MN (US); Naimul Karim, Maplewood, MN (US); Joseph J. Stoffel, Hastings, MN (US); Joseph A. Dunbar, Woodbury, MN (US); and Colby W. Dotseth, Baldwin, WI (US)
Assigned to Solventum Intellectual Properties Company, Maplewood, MN (US)
Appl. No. 17/595,549
Filed by Solventum Intellectual Properties Company, Maplewood, MN (US)
PCT Filed Jun. 12, 2020, PCT No. PCT/IB2020/055550
§ 371(c)(1), (2) Date Nov. 18, 2021,
PCT Pub. No. WO2020/261035, PCT Pub. Date Dec. 30, 2020.
Claims priority of provisional application 62/866,664, filed on Jun. 26, 2019.
Prior Publication US 2022/0228306 A1, Jul. 21, 2022
Int. Cl. D04H 1/56 (2006.01); D01F 6/34 (2006.01); D01F 8/10 (2006.01); D04H 1/4258 (2012.01); D04H 1/4291 (2012.01); D04H 1/4309 (2012.01)
CPC D04H 1/56 (2013.01) [D01F 6/34 (2013.01); D01F 8/10 (2013.01); D04H 1/4258 (2013.01); D04H 1/4291 (2013.01); D04H 1/4309 (2013.01)] 5 Claims
OG exemplary drawing
 
1. A method of making a nonwoven fiber web, the method comprising:
a) providing a melt-blown nonwoven fiber web comprising bonded primary fibers having an average fiber diameter of 2 to 100 microns, wherein the primary fibers comprise a copolymer comprising divalent hydroxyethylene monomer units and divalent dihydroxybutylene monomer units;
b) opening at least a portion of the melt-blown nonwoven fiber web to provide loose primary fibers;
c) combining the loose primary fibers with secondary fibers; and
d) forming a secondary nonwoven fiber web comprising the primary fibers and secondary fibers, wherein said forming the secondary nonwoven fiber web comprises airlaying a fiber blend comprising the loose primary fibers and the secondary fibers.