<p>A multi-layered paperboard having a high brightness and exceptional uniformity. The white topped paperboard has a base layer(s) made from wood pulp and a top fibrous layer made of unbleached wood fiber, filler and a binder to create a top fibrous layer of sufficient uniformity at moderate brightness levels. The top fibrous layer optionally contains a coagulant and/or a retention aid. In a preferred embodiment, the top fibrous layer of the multi-layered paperboard product is coated with a coating of additional fillers and binders to produce the desired level of brightness and uniformity. The invention also includes a process for making a multi-layered paperboard.</p>
申请公布号
WO2006039118(A1)
申请公布日期
2006.04.13
申请号
WO2005US33111
申请日期
2005.09.15
申请人
MEADWESTVACO CORPORATION;BABCOCK, BRUCE W.;THOMAS, TRICIA W.