Effect of dry strength agent on physical properties of paperboard containing organic filler made from agricultural byproduct

Abstract

In this study, the effect of dry strength agents on the physical properties of sheets containing organic filler made from rice husk (RH) was investigated. KOCC was used to make handsheets containing RH and empty fruit bunch (EFB), and the bulk and strength of the sheets were analyzed. To determine the effect of dry strength agents on paper strength, handsheets containing 9% RH organic filler were made by adding cationic polyacrylamide (C-PAM) and amphoteric polyacrylamide (Am-PAM) and their strengths were measured. Handsheet bulk increased as the amount of organic filler increased, but a reduction in paper strength was also observed. However, when C-PAM and Am-PAM were added to the stock, the breaking length, compressive strength, burst strength, and stiffness of the handsheets were improved as a function of the level of addition. Significant difference between the performances of C-PAM and Am-PAM was not observed as the level of addition increased from 3% to 9%. Ultimately, it was concluded that the use of dry strength agents could be a solution for the reduction in paper strength when organic fillers are applied. ? 2015 Korean Technical Assoc. of the Pulp and Paper Industry. All rights reserved.