What advantages of "composite bags" do you know?

Composite bags are suitable for vacuum or general packaging of food, electronics, chemicals, pharmaceuticals, tea, precision instruments, and high-tech defense products.
Raw Materials:
OPP, PE, POF, PPE, PP, composite film, etc.
Processes are divided into: side-seal bags, bottom-seal bags, center-seal bags, and three-side-seal bags. Four different machines are required. Composite bags have good insulation and protection properties, are impermeable to gases and water vapor, and thus effectively prevent the contents from absorbing moisture and vaporization, are not easily damaged by bacteria and insects, and have good shape stability and are not affected by humidity changes. "Colored composite bags," which come in various colors, and exquisite composite bags have a metallic luster and high reflectivity to heat and light, and the printed colors are more exquisite and bright.
Of course, another important point is that using shielding or washing to partially aluminum-plate allows for any pattern and any transparent window, allowing customers to see the contents of the packaging. This is a major advance in composite bag production technology and a significant feature of composite bags. Because structures like PET/PA/PE or CPP/PET/AL/CPP, PA/AL/CPP, PET/PA0/AL/CPP are common structures of composite bags, the outer layer can be printed film BOPET, BOPP, the inner layer can be heat-sealable film CPP, PE, and co-extruded film. AL (aluminum foil) is also one of them, usually used as the middle layer. These materials, according to requirements, are compounded into composite films using glue! These are the main characteristics of composite bags, hoping this helps.