Preparation and properties of a novel decorative base paper for formaldehyde-free adhesive impregnation

Abstract

Formaldehyde-free adhesives are gaining attention due to their compatibility with green production methods. Decorative base paper (DBP) is known for its physical strength and printability and has a high ability for absorbing aldehyde-free adhesives for impregnation. In this paper, DBP was prepared with TiO2 and SiO2 combined with polyvinyl alcohol (PVA), where the amount of TiO2 was reduced in the pulp process. The prepared DBP was impregnated by aldehyde-free adhesive and hot-pressed on wood-based panels. The results showed that upon SiO2 coating, the surface smoothness of base paper increased by 132.3%, whereas the tensile strength increased by 33.6%. Furthermore, the color density of cyan, magenta, yellow and black colors increased by 75.4%, 99.2%, 51.9% and 90.5%, respectively. The surface properties like surface bonding strength and wear resistance of the covered wood-based panels were found to satisfy the standard requirements, which indicates the products can be used for furniture products.