| abstract |
A coolant having a phase change according to the temperature inside the ice pack, and receiving and sealing the coolant, and including a wrapping paper having a paper layer, a first oxidative biodegradable film layer, and a second oxidative biodegradable film layer, wherein the first Each of the oxidative biodegradable film layer and the second oxidative biodegradable film layer discloses an eco-friendly paper ice pack including polyethylene, a first fatty acid metal salt, a second fatty acid metal salt, and a lubricant. |