Adsorption of paper strength additives to hardwood fibres with different surface charges and their effect on paper strength

Abstract Light-weight paper products that contain less fibres, but with a maintained bulk and improved strength properties, are highly desirable due to the low cost of raw materials logistics packaged goods. In this respect, adsorption capacity dry additives onto which is affected by surface charge said very important for development these mechanically robust products. The influence on was investigated for, dissolving grade kraft fibres modified carboxymethyl cellulose (CMC) different densities, same fibre dimensions. were cationic starch (CS), anionic polyacrylamide (APAM) polyelectrolyte complexes (PECs), containing CS APAM. A linear relationship found between saturated adsorbed amount CS. However, when either APAM or PECs as secondary layers CS, no correlation saturation could be observed. dramatically pre-adsorbed whereas influenced. Moreover, tensile (60%) strain at break (> 100%) handsheets formed It also CS/APAM increased sheet density while CS/PECs lowered it. conclusion, gained fundamental understanding significant importance facilitate industrial sustainable low-cost high-end packaging Graphical abstract