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US 2020/0399832 A1Published application
Compositions comprising microfibrilated cellulose and polymers and methods of manufacturing fibres and nonwoven materials therefrom
AssigneeFiberLean Technologies Limited
InventorsJonathan Stuart Phipps, Sean Ireland, David Skuse
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Abstract
Fibres and nonwoven materials comprising microfibrillated cellulose, and optionally inorganic particulate material and/or additional additives, and optionally a water soluble or dispersible polymer. Nonwoven materials made from fibres comprising microfibrillated cellulose, and optionally inorganic particulate material and/or a water soluble or dispersible polymer.
Claims20
-78. (canceled)
A method for preparing a fibre consisting of (a) microfibrillated cellulose and (b) one or more calcium carbonate and/or kaolin, the method comprising the steps of:
- (1) preparing a composition consisting of microfibrillated cellulose and one or more inorganic particulate material, wherein the microfibrillated cellulose has a fibre steepness ranging from about 20 to about 50;
- wherein the microfibrillated cellulose is obtained by a two-stage process of (i) grinding a fibrous substrate in a grinding vessel in the presence of one or more calcium carbonate and/or kaolin and (ii) refining in a refiner or homogenizing in a homogenizer, or sonicating with an ultrasonic device the ground fibrous substrate comprising cellulose and the inorganic particulate material;
- wherein the grinding is carried out in an aqueous environment in the presence or in the absence of a grinding medium;
- wherein the term “grinding medium” means a medium other than one or more calcium carbonate and/or kaolin;
- (2) extruding the microfibrillated cellulose from step (1) through an extruder;
- (3) attenuating the extruded microfibrillated cellulose with an attenuating gas;
- and
- (4) collecting the extruded fibre.
5 more elements
Dependencies are inferred from the claim text.