Abstract: This invention relates to a nonwoven material consisting of one or more layers of nonwoven webs of essentially continuous cellulosic filaments, characterized in that within each layer each of the three bonding mechanisms: a) hydrogen bonding, b) filament intermingling and c) merged filament bonding occur for bonding the essentially continuous cellulosic filaments. Further it relates to a process for the manufacture and to various uses of this material.
Type:
Grant
Filed:
April 3, 2017
Date of Patent:
March 28, 2023
Assignee:
LENZING AG
Inventors:
Tom Carlyle, Mirko Einzmann, Gisela Goldhalm, Malcolm John Hayhurst, Katharina Mayer, Ibrahim Sagerer-Foric
Abstract: This invention relates to a process and a device for manufacturing cellulose-based webs which are directly formed from lyocell spinning solution and in particular for the washing of directly formed cellulose webs.
Type:
Grant
Filed:
October 18, 2017
Date of Patent:
June 28, 2022
Assignee:
LENZING AG
Inventors:
Mirko Einzmann, Malcolm Hayhurst, Ibrahim Sagerer-Foric
Abstract: A material deposition device includes a solution supply component, a gas supply component, and a co-axial discharge mechanism. The co-axial discharge mechanism includes a solution discharge mechanism, and a gas discharge mechanism co-axial with the solution discharge mechanism. The material deposition device further includes an alignment component that aligns the solution discharge mechanism in a center of the gas discharge mechanism; and an orifice plate with a number of turbulence inducing structures that induce turbulence in gas exiting the gas discharge mechanism.
Abstract: An improved process for the preparation of a cellulose solution for spinning of fibers, filaments or films therefrom comprising the steps of: a) activating cellulose in a mixture containing said cellulose, tertiary amine oxide solvent and water for a period sufficient to allow a swelling of the cellulose by introduction therein of water present in said mixtures, the temperature of said activation step and concentration of solvent being such that the solvent is not converted into its monohydrate state during the step of activation; b) the cellulose mixture being subjected to the steps of dissolution of cellulose in the solvent by heating for removal of water so as to convert the solvent into at least its monohydrate form so as to cause a dissolution.
Type:
Grant
Filed:
November 6, 2008
Date of Patent:
May 10, 2011
Assignee:
Birla Research Institute for Applied Sciences