To break through the performance and high-endization bottlenecks of polyurethane adhesives, a comprehensive upgrade is required in four aspects: molecular structure, formulation system, process control, and material domestication.
In terms of molecular design, through controlled polymerization, segmental modification, and precise regulation of crosslinking density, the properties of heat resistance, hydrolytic resistance, aging resistance and bonding strength are enhanced. Key breakthroughs are made in aliphatic polyurethanes, high solid content, and solvent-free systems. This approach aims to reduce VOC emissions at the source and meet the long-term reliability requirements for high-end soft packaging and composite films. The introduction of functional components such as nano-fillers, organosilicon modification, and polyolefin polyols can significantly improve the temperature resistance, peel strength and resistance to media, narrowing the performance gap compared to other products.
At the formulation level, a precise and data-based system needs to be established. Specialized formulations should be developed for different substrates (PET, aluminum foil, nylon, film) to reduce the compromises in performance caused by general applicability. At the same time, the research on curing kinetics should be strengthened, and the proportion of curing agents and reaction rates should be optimized to solve common industry problems such as incomplete curing, blistering, and residual odors.
In terms of process and quality control, we implement continuous, automated, and low-vibration production, strictly control moisture, acidity, and molecular weight distribution, and enhance batch stability. High-end applications have extremely high requirements for consistency. A stable production system is the prerequisite for entering the high-end supply chain.
Finally, accelerate the specialization of core raw materials, break through the bottleneck areas of high-activity polyols, low-free isocyanate, and special additives, reduce costs while enhancing the autonomy of the formulation. Only by upgrading the entire chain from materials to formulations, processes, and quality control can we truly achieve the transformation from low-end homogeneity to high-performance, high-end, and customized products.
