发明授权
- 专利标题: Fiber blend having high yield and enhanced pulp performance and method for making same
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申请号: US16043472申请日: 2018-07-24
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公开(公告)号: US10975520B2公开(公告)日: 2021-04-13
- 发明人: Peter W. Hart , Darrell M. Waite , Dale E. Nutter, Jr. , Jared Bradberry
- 申请人: WestRock MWV, LLC
- 申请人地址: US GA Atlanta
- 专利权人: WestRock MWV, LLC
- 当前专利权人: WestRock MWV, LLC
- 当前专利权人地址: US GA Atlanta
- 代理机构: Walters & Wasylyna LLC
- 主分类号: D21C3/02
- IPC分类号: D21C3/02 ; D21B1/16 ; D21C9/00 ; D21H11/20 ; D21H21/18 ; D21H27/30 ; D21H27/38 ; D21H11/04 ; D21H11/08 ; D21H17/67 ; D21H21/32
摘要:
The present disclosure relates to producing paper or paperboard having improved stiffness and strength, compared to the conventional paperboard at the same basis weight. It also discloses a method of wood pulping having a significantly increased yield and providing fiber pulps with enhanced properties such as strength and stiffness. Wood chips are chemically pulped to a high kappa number, providing a rejects component and an accepts component. The rejects component is subjected to a substantially mechanical pulping process, optionally in a presence of bleaching agent, prior to blending back into the accepts component. The resulting fiber blend is washed, optionally bleached, and subjected to a papermaking process to provide paper or paperboard with enhanced strength and stiffness at low basis weight.