A recent performance evaluation report reveals that solvent-free polyurethane (PU) adhesives specifically developed for oil-resistant food plastic packaging have achieved remarkable results, outperforming traditional solvent-based alternatives in safety, durability and environmental friendliness, amid tightened global regulations on food contact materials and VOC emissions.
The evaluation, conducted by a professional food packaging testing institute, focused on key performance indicators critical to oil-resistant food packaging, including oil resistance, adhesion strength, migration safety and process adaptability. The tested solvent-free PU adhesives, formulated with food-grade polyols and isocyanates, showed zero VOC emissions and solvent residues below 0.5mg/m², far exceeding the national standard limit of 5mg/m².
In oil resistance tests, the adhesives maintained stable bonding performance after 72 hours of immersion in edible oil at 25℃, with no delamination or adhesion loss. Their peel strength reached 4.2N/15mm, surpassing the 2.0N/15mm required by national standards, and retained over 90% of their strength after high-temperature cooking at 121℃ for 30 minutes.
Notably, the solvent-free PU adhesives demonstrated excellent compatibility with mainstream plastic substrates such as PET, PE and aluminum foil, supporting high-speed lamination production with line speeds up to 12000m/h. They also reduced energy consumption by over 60% compared to solvent-based adhesives, as no drying ovens are needed.
Industry experts stated that with the implementation of stricter food safety standards, this specialized solvent-free PU will become a core material for high-end oil-resistant food packaging, helping enterprises meet environmental regulations and improve production efficiency. The global market for such adhesives is expected to grow at a CAGR of 7.5% through 2033, driven by sustainable packaging demands.
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