Coating Binder
Synthetic additives that dissolve or break apart in water during the repulping process provide a way to create moisture barriers that do not ruin paper recycling. A dispersible polymer resin forms a continuous film on the surface of the board to resist liquid penetration. Unlike traditional waxes or polyethylene, this material fragments into small particles that the mill can wash away from the useful fibres.
It enables the production of coffee cups and food trays that fit into existing waste streams. The chemistry involves polar groups that respond to the alkaline environment of the recycling plant.
Barrier Performance
The chemical structure of the resin determines the degree of water resistance and grease proofing achieved on the substrate. Applying a dispersible polymer resin requires precise temperature control in the coating station to ensure a smooth and defect free surface. If the coating is too thin, the barrier fails.
Recycling Clearance
Standard tests confirm that the film does not turn into sticky residue that ruins the paper machine felt. The dispersible polymer resin qualifies as a sustainable alternative because it detaches from the cellulose without requiring specialized high heat pulpers. Its use ends the reliance on permanent plastic laminates in the short life food packaging sector.
