LOCTITE LIOFOL LA 7280

Application Method: The recommended method of application for this adhesive mix is with a standard gravure roll coater.  When using this type of conventional coating equipment, apply the adhesive at 30 – 45% TSC for best results. Depending upon the film or foil combination, and the end use of the lamination, apply approximately 1.5 – 2.0 pounds / ream (2.4 – 3.3 gm/m2) coating weight of adhesive.  Deep draw applications often require higher coating weights to accommodate the package elongation. 
Drying: Optimum drying conditions are dependent on the specific machine speed, coating weight, dwell time, and efficiency of the dryer. A system with good air volume and exhaust is more effective than extremely high temperature to remove the solvents. 
The drying conditions should correlate to machine speed: Example: 50 - 60°C (122-140°F) at 165 fpm 60 – 80°C (140-176°F) at 500 fpm Dryers with multiple zones should be staged from a lower temperature in the first zone to higher temperatures in successive zones.  This will facilitate solvent removal without adhesive  skinning. Extremely high temperatures and over-drying the adhesive can result in cure irregularities and lower performance.  Caution should be taken to establish the optimum process conditions for your equipment.
Combining Nip: The lamination of the primary and secondary substrates should exhibit excellent initial tack when combined at heated nip temperatures of 122 – 158°F (50 – 70°C).  Pressure and temperature of the laminating nip may require adjustment based on the appearance, degree of wrap angle, dwell time, and thickness of the substrates.
Pot Life: Typically, this product at 40% solids in a closed container has a working time of 8 – 12 hours without substantial viscosity increase. However, solvent moisture content, relative humidity, temperature, solvent loss, and % running solids can all shorten the pot life of the adhesive mixture. Due to the chemical activity of the material, using material that is older than 8 –12 hours is not recommended. 
Curing: The laminate can be further processed, rewound and slit after 1-2 days of curing at room temperature.  To achieve complete curing, i.e., total resistance to severe environments, allow 7 – 14 days of storage at room temperature.  Cure rate may depend on film combination. 
Equipment Clean Up: Clean up of the application station is accomplished with solvents such as ethyl acetate, methyl ethyl ketone, acetone, or toluene.  Protective gloves should be worn.