In the field of food packaging, Polyethylene thin film (PE Film) and Polypropylene thin film (PP Film) are two main packaging materials, each showing different characteristics and a wide range of applications. The following is a detailed expansion of their main uses:
Polyethylene thin film (PE Film)
Basic packaging needs: Polyethylene thin film has become one of the most commonly used materials in food packaging due to its good flexibility and transparency. It is suitable for the basic packaging needs of a variety of foods, such as plastic wrap, food bags, etc. It can fit the surface of food tightly and effectively prevent food from contacting the outside air, thereby slowing down the oxidation process of food and extending the shelf life of food.
Moisture-proof and fresh-keeping: Polyethylene thin film has excellent moisture-proof properties and can block the penetration of water vapor. Therefore, it is particularly suitable for packaging foods that are easily affected by moisture, such as biscuits, nuts, bread, etc. At the same time, its tight packaging can also reduce the loss of moisture inside the food and maintain the taste and flavor of the food.
Frozen food packaging: The low temperature resistance of Polyethylene thin film makes it an ideal choice for frozen food packaging. In low temperature environment, the film can maintain its flexibility and strength, and is not easy to break or deform, thus effectively protecting the quality and safety of frozen food.
Environmental protection and sustainability: With the increase of environmental awareness, more and more Polyethylene thin films are made of degradable or recycled materials to reduce the impact on the environment. This environmentally friendly Polyethylene thin film is also more and more widely used in food packaging.
Polypropylene thin film (PP Film)
Heat resistance application: The biggest feature of Polypropylene thin film is its high heat resistance. It can maintain stable physical and chemical properties in high temperature environment, so it is very suitable for packaging food heated in microwave ovens. This film can withstand the high temperature generated by microwave ovens without deformation or melting, thereby ensuring the safety and hygiene of food during heating.
High-end packaging and display: Polypropylene thin film has high transparency, good gloss, and good mechanical strength, so it is often used for packaging and display of high-end food. For example, it is used to package exquisite foods such as cakes, chocolates, and candies, which can enhance the visual effect and grade of the product.
Versatility: Polypropylene thin film can also achieve more functions by adding different additives or special treatments. For example, adding antistatic agents can improve the antistatic properties of the film; adding barrier agents can improve the barrier properties of the film, etc. These versatility makes Polypropylene thin film have a wider application prospect in food packaging.
Environmental protection and sustainability: Like Polyethylene thin film, Polypropylene thin film has also begun to develop in the direction of environmental protection and sustainability. By using recyclable or biodegradable materials, the impact on the environment is reduced while meeting the safety and hygiene requirements of food packaging.
Polyethylene thin film and Polypropylene thin film each have their own unique advantages and application range in the field of food packaging. The choice of which film depends on the characteristics of the food, packaging requirements and consumer needs. With the advancement of technology and the enhancement of environmental awareness, the performance and application of these two films will continue to be improved and expanded.