公开(公告)号：EP4428300A1

公开(公告)日：2024-09-11

申请号：EP23160807.6

申请日：2023-03-08

申请人： SAPPI Netherlands BV

发明人： SIMONS, Jo ,  RUHL, Rian ,  CELA, Tina

IPC分类号： D21H19/02 ,  D21F5/00 ,  D21H19/40 ,  D21H19/44 ,  D21H19/82 ,  D21H19/84 ,  D21H25/04 ,  D21H27/10

CPC分类号： D21H27/10 ,  D21H19/02 ,  D21H19/40 ,  D21H19/44 ,  D21H19/822 ,  D21H19/84 ,  D21H25/04 ,  D21F5/181 ,  B32B27/10 ,  B32B27/32 ,  B32B29/005

摘要： A barrier paper, preferably for use in tropical conditions, comprising, in this order:
a paper-based substrate layer, comprising, in this order,
a base paper layer,
a first base paper overcoat layer comprising a polymer,
a second base paper overcoat layer comprising a polymer,
an inorganic layer,
optionally, a protective layer comprising a polymer,
characterized in that the paper-based substrate layer has a hygroexpansion of less than 0.5%, and preferably of 0.33% or less, and more preferably of 0.25% or less