As we all know, in our daily life, packaging bags can be seen everywhere, whether in stores, supermarkets, or e-commerce platforms, there are all kinds of beautifully designed, practical and convenient food packaging bags everywhere. It acts as a protective layer or barrier layer for the food, just like the "protective clothing" of the food.
It can not only effectively avoid external adverse factors, such as microbial corrosion, chemical pollution, oxidation and other hazards, ensure the quality and safety of food during storage and transportation, and prolong its shelf life, but also play a promotional role for food manufacturers. . Therefore, to a large extent, packaging bags have become an integral part of various foods.
This has also greatly driven the market of packaging bags. In order to occupy a place in the food packaging bag market, major manufacturers have continuously improved the quality of packaging materials and derived a variety of food packaging bags. To a large extent, this has brought a choice problem to food manufacturers.
However, the characteristics of different foods are different, so the protective requirements of different foods are also different. For example, tea is easy to be oxidized, damp and moldy, and requires good sealing, high oxygen resistance, and good hygroscopicity. If the selected material does not meet the characteristics, the quality of the tea cannot be guaranteed.
Therefore, according to the different properties of the food itself, scientifically select packaging materials. Lets show the material structure of some food packaging bags. The main food packaging materials on the market are as follows. At the same time, different materials are compounded according to the characteristics of the food.
Cookie packaging
If it is to be used for food packaging such as biscuits, the packaging material bag must have the characteristics of good barrier properties, strong shading, oil resistance, high strength, odorless and tasteless, and the packaging is very scratchy. Therefore, material structure combinations such as BOPP/EXPE/VMPET/EXPE/S-CPP are selected.
Milk powder packaging bag
If it is used for milk powder packaging, the packaging bag needs to meet the requirements of long shelf life, fragrance and taste preservation, anti-oxidative deterioration, anti-moisture agglomeration and other requirements. For milk powder packaging, BOPP/VMPET/S-PE material structure can be selected
Green tea bags
For tea packaging bags, in order to ensure the deterioration, discoloration and taste of tea, choose BOPP/AL/PE, BOPP/VMPET/PE, KPET/PE
The material structure can better prevent the protein, chlorophyll, catechin, and vitamin C contained in green tea from being oxidized.
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