1. Sterilization water is antecedently going by the preheating process in the upper hot-water kettle. Initial sterilization temperature is high enough, thereby shortening the sterilization time and consequently protecting product’s quality.
2. After sterilization process finishes, hot-water is recycled back to the upper hot-water kettle. Energy consumption is highly reduced and sterilization time is also shrunk.
3. In allusion to soft packaging products, particularly for those bulky packaging, speed of thermal break-through is rapid; hence, sterilization effect is distinct.