PP film can withstand the high temperature environment during microwave operation, and will not deform, melt or release harmful substances due to heating, ensuring the safe heating of food. Therefore, it is often used to make microwave food bags, microwave lunch box covers, etc., so that consumers can heat food in the microwave conveniently and quickly while maintaining the original flavor and nutritional value of the food. This type of packaging is also often designed with vents or steam discharge ports to ensure that the food can be heated evenly during the heating process to avoid local overheating.
PP film has good heat sealing performance and can be tightly bonded to itself or other film materials at a certain temperature and pressure to form a sealed packaging environment. This feature makes PP film very suitable for food packaging that needs to be stored or transported for a long time, such as meat, vegetables, fruits, etc. Through heat sealing technology, oxygen, moisture and microorganisms can be effectively isolated, the shelf life of food can be extended, and the freshness and taste of food can be maintained.
In addition to microwave heating, PP film can also withstand a certain degree of steaming temperature, which is suitable for some ready-to-eat food packaging that requires steaming. This type of packaging is usually designed to be resealable, which is convenient for consumers to steam and heat before use, and can keep the food sealed after heating to prevent food contamination.
Although the low-temperature resistance of PP film may not be as good as some other materials, it can still maintain sufficient stability and strength under conventional refrigeration and freezing conditions. Therefore, PP film is also often used to package various refrigerated and frozen foods, such as ice cream, frozen meat, seafood, etc. In these applications, the transparency and flexibility of PP film allow consumers to clearly see the state of the food, while facilitating access and storage.
For ready-to-eat foods that need to maintain a certain shape and stability, such as sandwiches, sushi, wraps, etc., PP film is also a good choice. It can fit the shape of the food tightly, provide sufficient support and protection, and prevent the food from deforming or breaking during transportation and storage. At the same time, the transparency and glossiness of PP film can also enhance the visual effect of the food and attract consumers' attention.
With the improvement of environmental awareness, more and more consumers are beginning to pay attention to the environmental performance of food packaging. Although PP film itself is not a degradable material, it is relatively easy to recycle and handle. Many countries and regions have established a complete PP film recycling system, reducing the impact on the environment through recycling and reuse. In addition, some manufacturers are constantly exploring and developing environmentally friendly PP film alternatives to meet the market demand for sustainable packaging.