Common material classification of frozen food packaging bags

As the core carrier of food packaging, the material selection of frozen food packaging bags directly affects the efficiency of cold chain storage and transportation. Plastic packaging, as the mainstream solution, combines the flexibility advantage of flexible packaging bags with the barrier properties of composite material packaging to provide comprehensive protection for frozen food.

● Single layer plastic packaging

Polyethylene (PE) materials are the basic plastic packaging options for frozen food packaging bags. LDPE (low-density polyethylene) flexible packaging bags are commonly used for food packaging, while HDPE (high-density polyethylene) is used for hard pallet packaging, forming a collaborative system of "plastic packaging food packaging" with flexible packaging bags. This type of plastic packaging is cheap, but it needs to compensate for the lack of barrier properties through thickness.

● Multi layer composite material packaging

When food packaging faces the need for oil penetration or oxygen sensitivity, composite material packaging becomes an inevitable choice. In a typical PET/PE structure frozen food packaging bag, the outer layer of PET provides a printing carrier and support, while the inner layer of PE ensures heat sealing performance. This collaborative design of "plastic packaging composite material packaging" makes the flexible packaging bag both display and functional.

● High barrier composite material packaging solution

Aluminum foil composite material packaging exhibits excellent barrier properties in frozen food packaging bags, allowing sensitive foods such as coffee beans and deep-sea fish to be stored for a long time. This type of material usually adopts the "PET/AL/PE" or "PA/AL/CPP" structure, and the aluminum layer not only blocks water vapor and oxygen, but also enhances the stiffness of the flexible packaging bag. It is worth noting that the plastic packaging layer in composite material packaging needs to be adjusted according to the characteristics of food.

● Innovation in Functional Plastic Packaging

To meet special application scenarios, plastic packaging materials are evolving towards functionalization. Some flexible packaging bags use nano silica modified PET to form micro nano structures on the surface of composite packaging materials, which not only improves printing adhesion but also enhances water mist barrier properties. This type of innovative material expands the application boundaries of plastic packaging while maintaining the basic performance of food packaging and frozen food packaging bags.

About Us

Fujin New Materials, After Several Years Of Development, Has Developed Into A Packaging Enterprise With A Certain Scale. Our Company Integrates R & D, Design, Printing, Bag Making, Testing And After-Sales Service Into A Comprehensive Printing Company. Our Company Is Specialized In Producing Flexible Packaging Bags And Composite Material Packaging: Vacuum Food Bag, Aluminum Foil Bag, Opp Bags, Pe Bags, Recyclable Coffee Bag, Kraft Paper Ziplock Bags, Snacks Packaging Pouches, Stand Up Ziplock Bags, Pet Food Bag,Frozen Food Packaging Bags Etc.