Flexible packaging composite water-based adhesive precautions

Water-based adhesive is a newly emerging environmental adhesive in plastic film composites, because its diluent is deionized water, so it will not cause harm to the environment. Once it is launched, it is rapidly favored by the market, but its application should pay attention to the following two points.

1. Because of the bidirectional nature of the molecular structure, it is preferable to use a composite between a plastic film and an aluminized film, that is, a non-polar end will firmly connect the film, and a polar end will firmly connect the aluminized layer.

2, because the water is not volatile, so the drying process requires strict. The temperature should rise evenly from low. The amount of dry air is sufficient and the wind speed is controlled at 8-12m/s. Anemometers can be used here for measurement, but care must be taken that the impeller and sensing parts of the anemometer must be made of metal, such as the aluminum impeller used in Landmecker CF-II anemometers. General anemometers use ABS plastic impellers and will deform and lose their function in environments exceeding 60°C.