期刊
CELLULOSE
卷 26, 期 6, 页码 4099-4124出版社
SPRINGER
DOI: 10.1007/s10570-019-02349-5
关键词
Refining; Beating; PFI; Strength; Stiffness; Fines; Densification; Fiber network; Simulation
资金
- Federal Ministry of Economy, Family and Youth
- National Foundation for Research, Technology and Development, Austria
- Swedish National Infrastructure for Computing (SNIC) at HPC2N, Umea [SNIC2017-1-175]
- VINNOVA [2016-02702]
Refining (i.e., mechanical beating of pulp) is a common procedure that is used in paper-making to improve the mechanical properties of the final product. The improvements caused by refining are mainly attributed to increased density and to a better bonding between fibers. In this work, we study how various mechanisms that can be triggered by refining affect the tensile behavior of the sheets. Consequently, we use direct numerical simulations of fiber networks. We relate our finding to the experimental measurements that we conducted on handsheets. We have found that fibrillar fines with size distributions below the resolution of modern state-of-the art pulp characterization tools have a substantial contribution to the increased strength and stiffness of the sheets.
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