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According to the usage of your FIBC a liner, also referred to as inner bag, might become necessary to enhance the features and/or protect your material respectively. These liner bags are mostly produced from polyethylene (PE) or combined materials.
For each big bag there is also a matching liner, which is either tabbed, sewn or glued onto the FIBC.
The following materials and liners are typical.
PE (Polyethylene)
PE liners are mostly characterized by their respective density. Therefore we distinguish between LDPE (low density polyethylene), MDPE (middle density polyethylene) and HDPE (high density polyethylene).
Ethylene Vinyl Alcohol is a copolymer of ethylene and vinyl alcohol and is frequently used in FIBC to build a protective barrier/layer between the good filled and the outer part of the packaging. This is especially useful in food grade bags or bags which need to protect its content against outer influences (oxygen, hydrocarbon etc.).
These liners are used for FIBC which need an inner bag but which have to be form stable at the same time. To combine these features this liner works like a PE Q-bag inside of an external PP-bag.
A liner is not automatically antistatic nor conductive. If the outer bag is enhanced by antistatic/conductive qualities the liner must also show certain characteristics (e.g. surface resistance of 1.0×107 Ohms per square metre for conductive liners). Please consult us to find the best solution for your purposes.
A liner is not automatically antistatic nor conductive. If the outer bag is enhanced by antistatic/conductive qualities the liner must also show certain characteristics (e.g. surface resistance of 1.0×109 Ohms for semi-conductive and 1.0×1012 Ohms per square metre for static dissipative liners). Please consult us to find the best solution for your purposes.
Aluminium liners are another option where e.g. food items must be protected from outer influences (oxygen, smell, flavour etc.). These liners are leak optimized and mostly feature a multi-layer/sandwich-construction with an aluminium foil in the centre for protection.