Food packaging bags are indispensable items in daily life, which are directly related to the quality and safety of food. The materials used in food packaging bags are clearly stipulated due to the application environment and relevant laws and regulations, and the following will introduce the common food packaging bag materials and their related characteristics.
Paper Bags
Paper packaging bags are generally used for outer packaging, mainly kraft paper, white cardboard and coated paper. This type of packaging bag has the characteristics of environmental protection, degradability, and easy recycling. The price of paper packaging bags is soft and cheap, and the appearance is relatively beautiful, and it is packed with some low-grade food. However, this type of packaging bag is easy to break, and is not suitable for packaging liquid food or small foods such as biscuits, such as paper packaging bags need to be used to package this kind of food, and other materials such as plastic or aluminum foil should be used as the inner packaging.
Plastic Bags
Plastic packaging bags are roughly divided into polyethylene (PE), polypropylene P), polyester (PET) and so on due to different textures.
Polyethylene (PE)
The packaging bag made of polyethylene has the characteristics of transparency, softness, good toughness, etc., and is suitable for packaging all kinds of food, such as candy, chocolate, biscuits, etc. Polyethylene packaging bags are divided into two types: high-density polyethylene (HDPE) and low-density polyethylene (LDPE). Among them, HDPE has a higher melting point than LDPE. High strength, suitable for packaging oily food.
Polypropylene (PP)
Polypropylene is a highly transparent plastic material, which is usually used to package transparent foods, such as biscuits, candy, potato chips, etc., and is also widely used to package frozen foods and cryogenic fresh foods.
Polyester (PET)
The packaging bag made of polyester plastic has high transparency, softness, moisture resistance and good oxygen resistance, and is a material widely used in packaging candy, chocolate, tea, dried fruit and other foods.
Aluminum Foil Packaging Bags
The biggest advantage of aluminum foil packaging bags is that they have strong oxygen barriers, so they can maintain the freshness and nutrients of the food.
Aluminum foil packaging bags are suitable for packaging some high-grade, high-quality foods, such as coffee, tea, salads, etc. However, due to the higher cost of aluminum foil, the price is also relatively expensive.
To sum up, although different materials have their own advantages when making food packaging bags, we must comply with relevant regulations and standards when choosing materials, and also take into account the characteristics of food and the use environment of packaging bags, in order to ensure the safety, hygiene and quality of food.
