Flexible packaging polyurethane laminating adhesives are the core materials for the composite processing of packaging in industries such as food, cosmetics, and medicine. With excellent comprehensive performance, they have become the mainstream bonding materials in the soft packaging industry. Their core features include six prominent aspects.
1. The bonding strength is high and the stability is good. It can firmly adhere to various flexible packaging substrates such as plastics and aluminum foil. The initial adhesion is strong and the final bonding is long-lasting. The composite product is not prone to delamination or blistering.
2. Excellent temperature resistance. It can be adapted to scenarios of low-temperature refrigeration and high-temperature sterilization. The adhesive layer does not soften or crack, and it is suitable for various cold and hot processing techniques.
3. Outstanding resistance to media. It can withstand erosion from substances such as acids, alkalis, oils, and moisture. It is suitable for special packaging scenarios such as sauces, cooked foods, and oily foods.
4. Excellent flexibility. After curing, the adhesive layer has excellent elasticity. It can follow the bending and stretching of flexible packaging, meet the usage requirements of packaging transportation, folding, and compression, and is not prone to cracking or falling off.
5. Wide process compatibility. It covers various types such as solvent-based, solvent-free, and water-based. The coating is uniform and the leveling is good. It is suitable for high-speed composite production lines and has high production efficiency.
6. Green, safe and environmentally friendly. Compliant products have no harmful substances such as benzene, and low VOC emissions. They comply with food contact safety standards, are non-toxic and odorless, meet the requirements of green packaging development, and are applicable to various food and daily product packaging.
