TPS Company's EVOH (Ethylene Vinyl Alcohol) resin represents a breakthrough in food packaging technology, particularly in rigid container applications. The material's unique molecular structure, featuring regularly arranged hydroxyl groups (-OH) along the polymer chain, creates an exceptional barrier against oxygen and other gases that could compromise food quality. This fundamental characteristic makes EVOH an invaluable component in modern food packaging, where maintaining product freshness and extending shelf life are paramount concerns.
In rigid food containers, TPS's EVOH resin is typically implemented within a multilayer structure, where it is sandwiched between layers of polyethylene (PE) or polypropylene (PP). This configuration is crucial because while EVOH provides superior barrier properties, it requires protection from moisture to maintain its performance. The outer layers serve this protective function, ensuring consistent barrier properties throughout the container's lifecycle. The structure demonstrates remarkable oxygen transmission rates as low as 0.01-0.1 cc/m²/day, superior resistance to oils and organic solvents, and excellent transparency and gloss.
The processing of TPS EVOH resin demands precise control and specialized equipment to achieve optimal results. The company provides comprehensive technical support, including detailed guidelines for processing temperatures (typically 190-230°C), moisture control requirements, and adhesive selection for multilayer structures. While the initial material cost may be higher than conventional plastics, the economic benefits are substantial when considering the extended shelf life and reduced food waste. These advantages have made TPS's EVOH resin a preferred choice for manufacturers seeking high-performance barrier solutions in rigid food containers.
