Application Of Polyurethane Laminating Adhesive In Food Flexible Packaging

Food flexible packaging serves as an important carrier for food preservation and storage during transportation. With the upgrading of the food industry, multi-layer lamination flexible packaging has become the mainstream. Polyurethane laminating adhesives, due to their excellent comprehensive performance, have become the core material for the lamination processing of food flexible packaging, accounting for over 80% of the market share. 

 

Polyurethane laminating adhesive is suitable for various packaging substrates such as PE, PET, and aluminum foil. It has high bonding strength and excellent flexibility, and can be adapted to high-speed lamination production processes. Its outstanding properties include high temperature resistance, oil resistance, and acid-base resistance. It can not only meet the low-temperature storage requirements of frozen food but also be compatible with high-temperature steaming and pasteurization processes for cooked food and sauce packaging, effectively preventing packaging delamination and cracking, ensuring packaging sealing, and prolonging the shelf life of food. 

Food safety and environmental protection are its core advantages. The current mainstream solvent-free, water-based polyurethane laminating adhesives have no VOC emissions and have extremely low migration of harmful substances, meeting the safety standards for food contact materials and eliminating the risk of contaminating food. Compared to traditional adhesives, it cures quickly, requires less coating, is suitable for large-scale production, and effectively reduces the cost of packaging production. 

 

Currently, this adhesive is widely used in various types of food flexible packaging such as snacks, dairy products, meat products, and beverages. With the popularization of the concept of green packaging, environmentally friendly polyurethane laminating adhesives with low odor and high durability will continue to drive the food flexible packaging industry towards safety, efficiency, and low carbon.