Composite soft plastics are widely used in frozen food packaging bags, and there are many combinations of materials and structures in such frozen food packaging bags. Composite soft plastics are relatively good in terms of moisture resistance, cold resistance, and puncture resistance.

Frozen foods such as glutinous rice balls, seafood processing, and ice cream use multi-layer composite packaging bags, which have good low temperature resistance, moisture resistance, and puncture resistance. OPP/LLDPE is mainly used for ice cream, OPP/AL/LLDPE is used for glutinous rice balls, and PET/NY/LLDPE is used for seafood processed food. The color printing of frozen food packaging bags will also use low-temperature resistant inks that can adapt to freezing and freezing environments to ensure that the patterns remain exquisite in low-temperature environments.

First, PET/PE
This composite material structure is more common in frozen food packaging. It has good moisture-proof, cold-resistant, and low-temperature heat-sealing properties, and its cost is relatively low.

Second, BOPP/PE, BOPP/CPP
This type of composite material structure is moisture-proof, cold-resistant, low-temperature heat-sealed with high tensile strength, and the cost is relatively economical. Among them, the appearance and feel of the packaging bag with BOPP/PE structure are better than those of PET/PE structure, which can improve the product grade.

Third, PET/VMPET/CPE, BOPP/VMPET/CPE
Due to the existence of the aluminum-plated layer, this kind of composite material structure has beautiful surface printing, but the low-temperature heat-sealing performance is slightly poor, and the cost is high, so the utilization rate is relatively low.

Fourth, NY/PE, PET/NY/LLDPE, PET/NY/AL/PE, NY/PE
The packaging of this kind of composite material structure is resistant to freezing and impact. Due to the existence of the NY layer, its puncture resistance is very good, but the cost is relatively high, and it is generally used for packaging angular or heavy products.

In addition, there is a simple PE bag, which is generally used as an outer packaging bag for vegetables and frozen foods. In addition to packaging bags, some frozen foods need to use blister trays. The most commonly used tray material is PP. Food-grade PP has better hygiene and can be used at a low temperature of -30°C. There are also PET and other materials. As a general transport package, corrugated cartons are also the preferred products for frozen food transport packages due to their shockproof, compressive properties and cost advantages.