Is the flexible packaging polyurethane adhesive toxic? Is it safe?

A Polyurethane Adhesive specially designed for flexible packaging composite production, widely used for the composite bonding of food snack bags, daily chemical aluminum-plastic films, and frozen-cooked flexible packages and other products. Its toxicity and safety cannot be generalized. The core lies in the type of adhesive, the production and construction stage, and whether it complies with the national food contact safety standards. Selecting and using it in compliance can ensure subsequent safety of contact.

 

During the unconsolidated production and processing stage, traditional solvent-based polyurethane adhesives for flexible packaging have certain safety risks. They contain free isocyanate monomers and volatile residual solvents. The volatile gases emitted during workshop operations can easily irritate the respiratory tract and skin. Inferior non-standard products may also contain harmful aromatic amines. They are strictly prohibited from being used in the production of food-contact flexible packaging. Nowadays, the mainstream in the industry has changed to water-based, solvent-free, and environmentally friendly products. These products have high solid content and extremely low VOC emissions, significantly reducing production pollution and immediate hazards. 

 

As long as it is a qualified flexible packaging adhesive that complies with food contact standards such as GB4806, after complete curing and compounding, the chemical reaction is completely finished, harmful substances are basically completely volatilized and reacted out. No toxic substances will be released or migrated. There is no formaldehyde residue. It is also stable under high-temperature boiling and low-temperature freezing conditions. When purchasing, make sure to choose compliant and qualified products. After the adhesive is fully cured and matured, the flexible packaging polyurethane adhesive is safe and harmless. It can be safely used to come into contact with food and for daily use.