Method of making a nonwoven fiber web, nonwoven fiber web, and multi-component fiber

US12000071B2 · kind B2 · utility

Assignee

• Solventum Intellectual Properties Company · US

Inventors

• Petra L. Kohler Reidi · Minneapolis, US
• Saurabh Batra · Minneapolis, US
• Hannah C. Cohen · Okabena, US
• Semra Colak Atan · St. Louis Park, US
• Naimul Karim · Maplewood, US
• Joseph J. Stoffel · Hastings, US
• Joseph A. Dunbar · Woodbury, US
• Colby W. Dotseth · Baldwin, US

Key dates

• Filing date: Jun 12, 2020
• Grant date: Jun 4, 2024
• Expiry date: Oct 18, 2040

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61F13/01017
• WIPO field: Textile and paper machines
• WIPO sector: Mechanical engineering

Abstract

A method of making a nonwoven fiber web comprises: 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; opening at least a portion of the melt-blown nonwoven fiber web to provide loose primary fibers; combining the loose primary fibers with secondary fibers; and forming a secondary nonwoven fiber web comprising the primary fibers and secondary fibers. A fiber web preparable according to the method and a multicomponent fiber including a first phase comprising a copolymer comprising divalent hydroxyethylene monomer units and divalent dihydroxybutylene monomer units and a second phase comprising a non-biodegradable polymer.