Cortec Corporation has launched EcoShield Barrier Coating, a recyclable moisture barrier coating for the food packaging industry.
Cortec® has developed EcoShield® Barrier Coating, an environmentally friendly coating for the food industry and other sectors that need a recyclable moisture barrier in order to replace environmentally problematic materials such as polyethylene or wax coated paper and cardboard.
EcoShield® Barrier Coating is a waterborne barrier coating that is recyclable and 100% repulpable, effectively eliminating the need to use traditional wax and polyethylene coatings. It can be used on kraft and recycled paper, as well as on liners for corrugated boxes, providing a waterproof moisture barrier with oil and grease resistance.
Papers coated with EcoShield® Barrier Coating also ensure other physical properties such as burst, tear, and tensile strength; elongation, folding endurance, coefficient of friction, and smoothness.
It can be applied by most common paper roll coaters, including gravure, flex, air-knife, reverse-roll, etc. Drying temperature is 180-200 °F (82-93 °C), and suggested paper weights are 8-11 lb/ream (3,000 ft2) (13-18 g/m1).
When tested according to ASTM E-96, paper coated with EcoShield® Barrier Coating showed very good water vapour barrier properties compared to a polyethylene coated paper and better than commercial waxed paper.
Water Vapour Transmission Rate
| | EcoShield® Barrier Coating for Paper | Polycoated Paper | Waxed Paper |
| WVTR[1] (g/hour•m2) | 0.61-0.69 | 0.4-0.71 | 6.5-6.9 |
Furthermore, it is formulated in compliance with FDA Code of Federal Regulations Title 21:
- §176.170-Components of paper and paperboard in contact with aqueous and fatty foods
- §176.180-Components of paper and paperboard in contact with dry food.
[1]: Tested according to ASTM E-96, 73 °F (23 °C), 50% RH. Example test ranges for EcoShield® Barrier Coated Paper (45# 3msf natural kraft paper, 10# coating), a comparable polyethylene coated paper (40# 3msf paper, 6# PE coating), and commercial waxed paper.
More info: http://www.cortecvci.com