The core of the EVA silver gray ice pack lining film lies in the PEVA material used in its inner layer. This material provides the key performance of the ice bag to maintain a low temperature environment in many aspects.
The thermal insulation performance of the PEVA material is the key to its maintenance of a low temperature environment. In terms of physical properties, the PEVA material has a high thermal resistance, which means that it can effectively block the penetration of external heat. When the ice bag is placed in a warm or hot environment, the external heat will try to enter the interior of the ice bag in various ways, thereby accelerating the loss of cold inside the ice bag. However, as a barrier, the PEVA lining can significantly reduce the efficiency of this heat transfer. It acts like an insulating layer, separating the external heat from the inside of the ice bag, thereby extending the cold preservation time of the ice bag.
Secondly, the flexibility and low temperature resistance of the PEVA material are also important factors in its maintenance of a low temperature environment. During the temperature change process, many materials may become brittle or crack due to thermal expansion and contraction, thus affecting their sealing and cold preservation effects. However, the PEVA material can maintain good physical properties in the face of temperature changes. Whether in high or low temperature environments, it can maintain sufficient flexibility and structural stability and is not easy to break or deform. This feature ensures that the lining of the ice bag can always fit tightly to the wall of the ice bag during long-term use, preventing the cold from escaping from the gap.
In addition, the non-toxic and odorless properties of PEVA material are also important advantages as an ice bag lining. In the field of food refrigeration and transportation, ice bags often need to be in direct contact with food. Therefore, the safety and hygiene of the lining material are crucial. PEVA material is an environmentally friendly, non-toxic, and odorless material that does not release harmful substances, thereby ensuring the quality and safety of refrigerated food.