US 12,325,959 B2
Method for production of filler loaded surface enhanced pulp fibers
Harshad Pande, Pointe-Claire (CA); and Bruno Marcoccia, Charlotte, NC (US)
Assigned to Domtar Paper Company, LLC, Fort Mill, SC (US)
Filed by Domtar Paper Company, LLC, Fort Mill, SC (US)
Filed on Oct. 31, 2022, as Appl. No. 18/051,147.
Application 18/051,147 is a continuation of application No. 15/787,147, filed on Oct. 18, 2017, granted, now 11,499,269.
Claims priority of provisional application 62/409,666, filed on Oct. 18, 2016.
Prior Publication US 2023/0084180 A1, Mar. 16, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. D21D 1/20 (2006.01); D21H 11/20 (2006.01); D21H 17/67 (2006.01); D21H 21/10 (2006.01); D21H 25/00 (2006.01)
CPC D21H 17/675 (2013.01) [D21D 1/20 (2013.01); D21H 11/20 (2013.01); D21H 21/10 (2013.01); D21H 25/005 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A method of making a filler-loaded pulp composition for generating a paper product, the method comprising: introducing wood pulp fibers and a first plurality of filler particles into one or more refiners; and refining the wood pulp fibers and the first plurality of filler particles with the refiner(s), wherein in each of the refiner(s) the wood pulp fibers and the first plurality of filler particles are refined together, wherein at least one of the refiner(s) operates at a specific edge load that is between 0.10 and 0.30 Watt-seconds/meter, wherein the first plurality of filler particles are introduced into the refiner(s) at an addition point directly before a respective refiner inlet of the refiner(s), and wherein the paper product has an ash retention of between approximately 71.9% to 86.3%.