公开(公告)号：EP0869218A1

公开(公告)日：1998-10-07

申请号：EP97302250.2

申请日：1997-04-02

申请人： WESTVACO CORPORATION

发明人： Marwah, Nipun ,  Gold, Allen A.

IPC分类号： D21C1/00 ,  D21C5/02 ,  D21B1/32 ,  B03C1/00

CPC分类号： D21C5/02 ,  D21C5/025 ,  D21D5/005 ,  Y02W30/648

摘要： An improved process is disclosed for removing "stickies" from waste paper which contains hot-melt and pressure-sensitive adhesives and lattices to produce high quality (high brightness, little to no dirt content) pulp with little or no fiber loss. The process involves attachment of sticky particles in the waste paper pulp to a magnetic carrier material with the help of an agglomeration agent followed by removal of the attached sticky particles by magnetic separation. The magnetic treatment preferably is conducted at ambient or greater temperature, at neutral to alkaline pH and at a low pulp consistency. Agglomeration and magnetite addition, followed by exposure of the repulped waste paper to a magnetic field provides near complete sticky removal over exposure to the magnetic field without such pre-treatment.

摘要翻译： 公开了一种改进的方法，用于从含有热熔和压敏粘合剂和网格的废纸中除去“粘性物质”，以产生很少或没有纤维损失的高质量（高亮度，少至无污垢）的纸浆。 该方法包括借助于附聚剂将废纸浆中的粘性颗粒附着到磁性载体材料，然后通过磁力分离除去附着的粘性颗粒。 磁性处理优选在中性至碱性pH和低浆浓度的环境温度或更高温度下进行。 聚集和磁铁矿的添加，随后将再生废纸暴露于磁场，在暴露于磁场的情况下提供接近完全的粘性去除，而无需这种预处理。