Enhancement of recycled board strength by surface treatment and additives on size-press section

Document Type : Research Paper


1 Wood and Paper Science and Technology Department; Tarbiat Modares University

2 Wood and Paper Science and Technology Department, Natural Resources Faculty, Tarbiat Modares University, Noor, Mazandaran,Iran

3 university of Maine, Orono, ME,USA


Surface treatment of paper and paperboard especially in size press has long history in the industry. Various starches and additives are used to improve the surface quality and surface sizing of the paper. But, application of starch and additives in size press is increasing with the purpose of improving the strength and packaging properties of recycled liner paperboard. Therefore, it is necessary to study the relationship between surface treatment process with additives and its impact rate on enhancement of certain resistance indices. So, in this research, starch with various concentrations (1-8%) and also following reinforcement with 5% nano-fibrillated lignocellulose were applied on the surface of industrially produced recycled liner board containing no additive. Also, viscosity variation was studied as one of the important variables. The results showed the surface treatment resulted in enhancement of all investigated strength properties. But the effect of increase in starch concentration and the amount of absorbed starch was not significant in some cases.


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