Learn how to set up your process, control critical parameters, and solve common issues to achieve a perfect barrier with Coaterex.
Before starting, you must ensure the product is at its optimal operational levels.
Measure it every 2 hours using Zahn #2 cups (20-30s) or Ford #4 (18-25s). If it rises too much, dilute with water by a maximum of 5%.
Ideal range: 8.5 to 9.5. Low pH can cause lumps or instability. Use our stabilizer if you detect pH drops.
Keep the product between 20°C and 35°C (68°F - 95°F). Avoid direct sun exposure in the storage tank.
Agitate the product mechanically for 10 min before use. Clean the rollers of any residue from previous processes.
Adjust the roller or rod pressure for the desired GSM. Monitor that there is no excessive foam in the tray.
Ensure air temperatures between 80°C and 120°C. The substrate should exit with residual moisture below 6%.
Wash with warm water immediately after finishing production. Do not let the product dry on the rollers or anilox.
Cause: Surface tension or dirt. Solution: Increase application pressure or clean the substrate.
Cause: Insufficient drying or excessive coating weight. Solution: Increase oven temperature or reduce machine speed.
Cause: GSM too low or paper porosity. Solution: Increase the applied weight or use a more closed paper.
Cobb Test (30 min): Measure water absorption. Ideal < 15 g/m² for high barriers.
Kit Test (Grease): Use the oil scale to verify there is no grease migration.
Rub Resistance: Check that the coating does not peel off mechanically.
Our engineers can assist you remotely or in person to optimize your application line.