SWL / SF(Safe Working Load / Safety Factor)
These units indicate the maximum weight-bearing capacity of the FIBC related to a nominal weight and the linked safety factor. Especially for potentially hazardous goods these indications are vital as cracks have to be avoided under all circumstances. According to the EFIBCA standards the following categories are used: single trip, standard duty as well as heavy duty.
The characteristics of the good to be transported are the guideline for the choice of the so-called « dustproofing », which of course has to be a different one for coarse-grained material compared to fine, almost liquid powder. In case of doubt a liner (please also see liner types and standards), if possible, should be used here in order to avoid leakage of the contents
One way of enhancing the surface of the FIBC, providing it with more stability and protection, is the coating of the fabric. Coating is achieved by applying a thin film onto the PP strips, the thickness is indicated in gram per square metre (g/m2 or gsm). By means of coating the contents of the FIBC is protected from air and humidity. Moreover leakage of the product is prevented.
Due to the characteristics of the basic material (polypropylene) it is not advisable to store the FIBC in the sun without protection over a longer period of time. However, for limited periods in which sun radiation is unavoidable it might be useful to enhance the material with a UV stabilization so that the contents stays safely packed.
FIBC used in these parts of the industry are subject to extremely high requirements as the contents has to be protected according to the applicable laws and regulations. As a consequence the production and quality control of these FIBC are also very demanding in order to guarantee a maximum of safety.FIBC used in these parts of the industry are subject to extremely high requirements as the contents has to be protected according to the applicable laws and regulations. As a consequence the production and quality control of these FIBC are also very demanding in order to guarantee a maximum of safet
(English) 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.