公开(公告)号：US20240279874A1

公开(公告)日：2024-08-22

申请号：US18571357

申请日：2022-06-09

申请人： Billerud Aktiebolag (Publ)

发明人： Thomas Lindstedt ,  Stefan Ericsson

IPC分类号： D21H11/04 ,  D21H27/30

CPC分类号： D21H11/04 ,  D21H27/30

摘要： There is provided a method of forming a multi-layered paperboard comprising a bottom layer, a top layer and a middle layer arranged between the top layer and the bottom layer, wherein the middle layer is formed from a middle layer furnish comprising at least 30% by dry weight of a HT-CTMP from a mixture of hardwood and softwood, which middle layer furnish is fed to a wire from a middle layer head box in which the consistency is above 0.30%, such as above 0.40%, such as at least 0.43%.