US-based company Cortec has developed a water-borne moisture barrier coating that provides paper manufacturers with the ability to develop non-toxic, effective, environmentally friendly paper and corrugated-board alternatives to wax and polyethylene papers.
The EcoShield Barrier Coating can be applied by the manufacturers onto their Kraft paper, recycled paper and linerboard in order to develop fully recyclable and repulpable paper and boxes that would be able to resist moisture, oil and grease.
Papers or linerboard coated with the moisture barrier coating system can attain a very low moisture vapour transmission rate (MVTR) compared to that of polycoated or waxed paper.
The coating also has a high kit value rating of 12 indicating oil and grease resistance.
Manufacturers can enhance a paper’s level of moisture resistance by applying a thicker coating of EcoShield Barrier to the paper or linerboard substrate.
The coating’s dual moisture and grease-resistance capability develops a packaging material that helps seal out moisture or other contaminants that would damage packaged goods.
It also helps prevent leakage or packaging failure for items that are greasy in nature.
In addition, the EcoShield Barrier Coating helps increase a paper’s physical properties, such as burst, tear and tensile strength, elongation, folding endurance, coefficient of friction, and smoothness.
EcoShield Barrier Coating can be applied by most common paper roll coaters such as gravure, flex, air-knife and reverse-roll.