Liners and food grade
When a liner is necessary, which one to choose, and what “food grade” actually means.
What a liner does
Woven polypropylene is strong, but it is not a barrier: moisture and fine particles pass through the weave. The inner polyethylene liner adds the protection the fabric cannot provide.
Loose liner
Inserted without attachment. Economical and simple, suited to free-flowing granular products.
Tabbed liner
Spot-glued to the bag body. It will not shift during filling — the choice for high throughput.
Form-fit liner
Pre-shaped to the bag geometry. Clean filling and complete discharge, for fine powders.
Barrier liner
Multilayer or foil, against moisture, oxygen or odour, for sensitive products.
“Food grade”: what it actually requires
A food grade FIBC is not simply a clean bag. It means virgin resin (no regrind), production in a controlled environment, lot traceability, and documentation you can hand to an auditor.
If your product touches food directly, say so in your quote request: the construction, the liner and the paperwork are different, and none of it can be added after the fact.
A common mistake
Many buyers order a liner “just in case” when they do not need one — that is cost with no return. Others skip it on a hygroscopic product and lose a full lot on the first humid night. Tell us what you are bagging and we will tell you straight whether a liner is warranted.
Question about your application?
Our specialists have been sizing FIBCs for three generations. Tell us your product and your constraints.