Soy flour and soy lecithin improve paper strength and formation

作者:Naithani, Ved; Lucia, Lucian A.*; Banerjee, Sujit*
来源:Nordic Pulp & Paper Research Journal, 2016, 31(3): 407-410.
DOI:10.3183/NPPRJ-2016-31-03-p407-410

摘要

Addition of soy flour to a batch repulper in a recycle linerboard mill led to a 6% increase in ring crush at a cost of about $2/tonne. In laboratory work, soy lecithin provided similar increases in burst and other parameters for both virgin and recycle pulps. The underlying mechanisms through which soy flour and lecithin act are different. Protein solubilized from soy flour in the repulper promotes fiber bonding through charge effects. Lecithin coats fiber surfaces and reduces surface roughness as shown by nanoscale imaging. It is proposed that inter-fiber friction is reduced as a consequence, which improves formation.