公开(公告)号：US09765482B2

公开(公告)日：2017-09-19

申请号：US15026872

申请日：2014-10-03

Applicant: BASF SE

Inventor： Paul Kenneth Cutts

IPC: D21H21/10 ,  D21H17/67 ,  D21H17/37 ,  D21H11/08 ,  D21H11/12 ,  D21H17/44 ,  D21H17/68 ,  D21H11/10

CPC classification number: D21H17/675 ,  D21H11/08 ,  D21H11/10 ,  D21H11/12 ,  D21H17/375 ,  D21H17/44 ,  D21H17/67 ,  D21H17/68 ,  D21H21/10

Abstract: The present invention relates to a process of manufacturing paper or paperboard which comprises providing (a) a mechanical pulp and (b) a wood free pulp, combining (a) the mechanical pulp and (b) the wood free pulp to form a mixed pulp comprising no more than 20% by total dry weight of fiber of the mechanical pulp, flowing the mixed pulp as a medium consistency stock and combining the medium consistency stock with dilution water to form a low consistency stock, draining the low consistency stock through a wire or mesh to form a sheet of paper which is dried, in which additional filler and a cationic polymer are added to the mechanical pulp.