Synthetic Polymer
Polymer dispersions used for advanced coatings often incorporate durable chemical structures to resist harsh environmental factors. The composite resin known as polycarbonate polyurethane provides exceptional resistance to hydrolysis, oxidation, and heat when applied as a barrier coating on paperboard packaging. It forms a tough, flexible film that protects the paper from grease, water, and chemical attack.
Protective Efficiency
Protective efficiency of this barrier system is far superior to standard polyester alternatives. Because polycarbonate polyurethane resists moisture-driven degradation, it maintains its barrier performance even under tropical storage conditions. This property makes the resin suitable for high-end food containers and industrial packaging.
Processing Behavior
Processing behavior of these resin formulations during high speed coating runs is characterized by excellent shear stability and uniform film formation. When applied via gravure or rod coater, polycarbonate polyurethane dries quickly to form a tack free surface that prevents sheets from sticking together in the delivery pile. The dried coating retains its high elasticity, allowing the substrate to be deeply embossed or folded without fracturing the barrier layer.
It adheres well to both recycled and virgin fibers, ensuring that no delamination occurs during high speed carton converting. Packaging manufacturers select this polymer for demanding applications where durability must be maintained over long shelf lives.
