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Saturated Polyester Resin for Can Coating
Saturated polyester resins designed for can coating applications offer high chemical resistance, excellent flexibility, and strong adhesion to metal surfaces exposed to aggressive filling products. These resins are formulated to meet food-grade and beverage-grade coating standards, ensuring long-term protection against corrosion, taste contamination, and staining.
This type of Saturated Polyester Resin supports high-speed coating lines, smooth film formation, and outstanding pasteurization and sterilization resistance for internal and external can layers. Key ingredients include terephthalic acid (PTA), isophthalic acid (IPA), neopentyl glycol (NPG), cyclohexane dimethanol (CHDM), adipic acid, and safe cross-linking agents suitable for food contact compliance. Additives such as wetting agents, catalysts, flow modifiers, and BPA-free stabilizers improve coating efficiency and safety. These resins are compatible with white enamel, clear coatings, gold coatings, and overprint varnishes used in beverage cans, aerosol cans, food cans, and metal closures.
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Production involves controlled esterification of diols and dicarboxylic acids under precise temperature and vacuum conditions, followed by polycondensation to reach the desired molecular weight and hydroxyl value. The resin is filtered, stabilized, and flaked or pelletized for uniform dispersion in can-coating formulations. Saturated polyester resins for cans provide high gloss, excellent acid resistance, outstanding sulphur stain resistance, and strong retort performance in acidic, alcoholic, carbonated, and high-temperature filling environments. They prevent metallic migration, improve shelf-life stability, and maintain taste neutrality — essential for food and beverage safety regulations. Their elasticity supports deep-drawing, crimping, and stamping without cracking, even in thin-film coating systems. IF YOU ARE WILLING TO BUY VARIETY OF POLYESTER RESINS FROM IRANIAN SUPPLIERS, PLEASE SCROLL DOWN AND SUBMIT YOUR REQUEST. |
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