Status of Packaging Materials for Frozen Foods and Analysis of Temperature Changes inside Packaging Materials during Frozen Process

This study analyzed various packaging materials and types for frozen foods and the effects of packaging materials on temperature changes during frozen process. Pouches with different film thickness were prepared and placed in an IQF freezer, then the temperature inside pouches measured using a deep thermometer. The most common types of primary packaging for frozen foods in the marketwas plastic pouches with polyethylene or polyamide/polyethylene multilayer materials. The temperature change inside of packaging was delayed with film thickness increased. As the size of packaged food increased, the temperature change inside the food was slowed down. In addition, the pouches with air inside took more time to reach -30oC compared to pouches with less air during frozen process. This study provides information on packaging materials and types for frozen foods and preliminary data of temperature change by different types of packaging.