The study of PET recyclable polymers as paper coatings

Two PET recyclable polymers, EvCote® PGLR-30 and EvCote® PWRH-30, at four ratios (0, 5, 10, 15 wt%) were studied as components of paper basecoats. The results showed that 5% of the PET recyclable polymer was the optimum ratio with regard to properties of the coated paper, particularly MVTR (moisture vapor transmission rate) and Cobb. Both of the PET recyclable polymers were evaluated as a paper topcoat as well. The results showed that both of the PET polymers as topcoats could provide excellent MVTR and Cobb properties, particularly combining with the optimized PET polymer used in the basecoat. It was also found that when the PET polymer was used as the topcoat, the effect of clay/latex ratio in the basecoat was important: more clay gave better MVTR and repulpability.