Cortec Corporation has developed a waterborne moisture barrier coating that allows paper manufacturers to create non-toxic, environmentally friendly paper and corrugated-board alternatives to wax and polyethylene papers. By applying EcoShield Barrier Coating onto their Kraft paper, recycled paper, and linerboard, manufacturers can produce fully recyclable and repulpable paper and boxes that resist moisture, oil, and grease.

Historically, polyethylene and wax coatings have been used to seal porous paper, as well as corrugated boxes and sheets to provide a moisture barrier and/or moisture-vapour barrier to these substrates. These coatings have resulted in paper products that cannot be recycled through normal channels.

EcoShield Barrier Coating imageThe EcoShield Barrier Coating allows for coated papers or linerboard to remain fully recyclable and repulpable. It ensures a very low moisture vapor transmission rate (MVTR) comparable to that of polycoated or waxed paper, and has a high kit value rating of 12, indicating excellent oil and grease resistance. Manufacturers can increase a paper’s level of moisture resistance by applying a thicker coating of EcoShield Barrier to the paper or linerboard substrate.

The dual moisture and grease resistance of the EcoShield Barrier Coating creates a packaging material that helps seal out moisture or other contaminants while protecting against leakage or packaging failure for items that have greasy characteristics. The coating also enhances a paper’s physical properties such as burst, tear, and tensile strength; elongation and folding endurance; coefficient of friction, and smoothness.

EcoShield Barrier Coating can be applied by most common paper roll coaters, including gravure, flex, air-knife, and reverse-roll. The coating’s drying temperature is 82°-93°C. Suggested coating weights are 13-18 g/m2.


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