What are FIBC Liners?
Poly liners are plastic liners that are inserted into FIBCs and provide protection against leaks. They will often be employed where fine powders are being stored and transported or an additional moisture barrier is required to add protection to the product.
As we mentioned earlier, companies can buy poly liners for bulk containers and insert them into almost any FIBC. It is also possible to purchase bags that come ready with liners that are pre-built into the woven polypropylene. The main advantage of buying bulk containers with liners installed is the number of options you have. This allows lined bags to be used for a number of different products and applications.
A coated bulk bag is constructed similarly to a standard FIBC, however, before the container is sewn together, an additional polypropylene film is added to the bag's fabric sealing the small gaps in the poly weaves. This film may be added to the inside or outside of the container.