Retort allows products to increase shelf life significantly. Depending on the surrounding environment and the specific product, retort can extend the shelf life up to 10 years! Not only are the products ready to eat with no water required and can be stored at room temperature, but they are packed in a light and resistant pouch made of a metal and plastic mix.
First, the manufacturer must seal the food in an airtight pouch capable of withstanding high temperatures and pressure
Second, the packaged foods are placed in a sterilizer, which functions similarly to a pressure cooker. Depending on the food, the sterilizer will heat the packaged food under controlled pressure from 240F to 270F. This will destroy bacteria, yeasts, and molds, which commonly cause spoilage.
Third, it is cooled to prevent further product cooking, maintaining its texture and quality.
As mentioned, the packaging is not a regular pouch but layered. The standard retort pouch’s outermost layer is polyester, which is incredibly durable and resistant to wear and tear. Underneath, an aluminum layer prevents any external oxygen, light, or moisture from entering the pouch. The innermost layer is polypropylene, which is food-safe and protects the product from the other layers.
En Connection 