What is composite packaging?

Composite packaging bags include center-sealed bags, three-side sealed bags, piano-sealed bags, stand-up bags, four-side sealed bags, and special-shaped bags; or they can also be divided into container bags, general transportation and distribution bags, small-shaped packaging bags, etc.
Composite packaging bags are composite packaging made of two or more materials that have undergone at least one dry composite process to form a certain performance. It can be divided into base layer, performance layer and heat sealing layer. Such as BOPP, BOPET, BOPA, MT, KOP, KPET, etc.; the performance level should play the role of barrier and light protection, such as VMPET, AL, EVOH, PVDC, etc.; the heat sealing layer is in direct contact with the packaging bag items to provide permeability resistance, Good heat sealability, transparency, etc., such as LDPE, LLDPE, MLLDPE, CPP, VMCPP, EVA, EAA, EBA, etc.
Composite flexible packaging materials can be used only after they are initially made into various packaging bags. There are two ways to make bags. One is that the packaging bag manufacturer uses roll film to fill on the automatic packaging machine and forms and packages it into various packaging bags; the other is that the bag making machine makes various packaging bags. Refill contents. Bags come in many shapes, so in many cases, bags are made first. The main types of bags include: three-side sealing bags, back-sealing bags, accordion bags, stand-up bags and other composite packaging.
Composite packaging varieties can be roughly divided into three types:
1. Container packaging bags
A large-capacity transportation and distribution packaging bag, containing more than 1 ton. The top of the container bag is generally equipped with metal hangers or lifting rings to facilitate lifting and transportation by forklifts or cranes. When unloading, you can close the unloading hole at the bottom of the bag and unload immediately, which is very inconvenient. Suitable for shipping granular and powdery items. Individually, they are woven from polyester fibers such as polypropylene and polyethylene. Because container bags are very fast to load, unload and transport items, the loading and unloading efficiency has been significantly improved.
2. Individual transportation and distribution packaging bags
Multi-layer material packaging bags made of multi-layer flexible materials. For example, linen bags, woven bags, cement bags, etc. Packaging of powdery, granular and small items.
3. Small packaging bags
Packaging bags with a small loading volume are generally made of single-sided or double-layer materials. Some packaging bags with special requirements are also made of multiple layers of different materials, with a wider packaging range.
Among the above types of composite packaging bags, container bags are suitable for transportation and distribution, and individual transportation and distribution bags are suitable for outer packaging and transportation and distribution. Composite packaging bags and small packaging bags are suitable for interior packaging, personal packaging and commercial packaging.