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Brief Introduction to Low Temperature Curing Powder Coatings
source：www.cnjindu.com | Release time：2025年11月05日1. Core advantage: Adapt to special needs and reduce application barriers
Save energy consumption and costs: Lowering the curing temperature by 40-80 ℃ can reduce the energy consumption of heating equipment, while shortening the curing time (usually 5-15 minutes) and improving production efficiency.
Suitable for thermosensitive substrates: It can be used for substrates that cannot be covered by traditional high-temperature powder coatings, such as plastics (ABS, PC), wood, low-temperature alloys, etc., to avoid deformation and aging of the substrate due to high-temperature curing.
Maintain environmental characteristics: Consistent with traditional powder coatings, it does not contain solvents, has low VOC (volatile organic compound) emissions, complies with environmental regulations, and the coating can be recycled and reused, reducing waste.
2. Key technology: The core principle of achieving low-temperature curing
Resin system optimization: Low glass transition temperature (Tg) resins (such as modified epoxy resins and acrylic resins) are used to reduce the temperature threshold for resin melting and cross-linking reactions, ensuring normal film formation at low temperatures.
Efficient curing agent combination: Use curing agents with higher reactivity (such as special amines and blocked isocyanates) to quickly initiate resin crosslinking at low temperatures, while ensuring the adhesion and durability of the coating.
Synergistic effect of additives: Adding leveling agents, defoamers and other additives to improve the leveling of the coating during low-temperature curing, avoid defects such as orange peel and pinholes, and enhance the appearance and performance of the coating.
3. Main application scenarios: covering special needs of multiple industries
In the field of plastics and composite materials, it is used for surface coating of plastic parts (such as home appliance casings and automotive interior parts) and carbon fiber composite materials to avoid damage to substrate properties caused by high temperatures.
Wood and Furniture Industry: Replace traditional solvent based wood coatings for the coating of solid wood and engineered board furniture. Low temperature curing can protect wood texture while achieving environmentally friendly and wear-resistant coating effects.
Thermal sensitive metal field: used for thin-walled metal parts (such as aluminum cans, small hardware) or surface treated metals (such as galvanized sheets) to prevent substrate deformation or coating damage caused by high temperatures.
4. Performance characteristics: Balance low temperature and coating quality
Basic performance standards: The cured coating can reach the level of traditional high-temperature powder coatings in terms of adhesion, hardness, impact resistance, etc. Some products can also meet special requirements such as salt spray resistance and weather resistance.
Limitations to note: Compared to high-temperature powder coatings, some low-temperature products have slightly weaker long-term temperature resistance and chemical corrosion resistance, making them more suitable for applications in non extreme environments (such as indoor appliances and civilian furniture).
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