Imagine having to cross a suspension bridge with your car. If the sign indicates a limit of 2 tons, would you feel safe knowing that the bridge was designed to collapse at exactly 2.1 tons? Probably not.

In the packaging industry, the principle is the same. When we talk about Big Bag(FIBC), the difference between carefree transportation and logistical disaster is all in one number: the Safety Factor (SF).

The safety factor is the ratio of the rated load capacity(SWL – Safe Working Load) to the maximum breaking strength of the bag during laboratory testing. The SWL is the maximum weight you can load into the Big Bag (e.g., 1,000 kg), while the 6:1 safety factor means that the bag is designed and tested to withstand up to 6 times its stated load before structurally failing.

Simply put: you are lifting an “elephant” of weight, but the polypropylene “handkerchief” that contains it has a hidden reserve of strength ready to handle any unforeseen contingency.

You might ask, “If I only load 1,000 kg, why do I need the bag to hold 6,000 kg?” The answer lies in the dynamics of the real world, quite different from the static conditions of a perfect warehouse:

1. Dynamic stresses: when a forklift brakes sharply or hits a pothole, the load undergoes acceleration that instantly multiplies the force exerted on the slots
2. Wear and reuse: while 5:1 bags are certified for single use (single-trip), Big Bags with a 6:1 factor are designed to be reusable (multi-trip). The more robust construction compensates for the natural, microscopic wear and tear that occurs with each emptying and filling cycle
3. Psychological and economic peace of mind: a failure means not only loss of product, but downtime, potential work injuries, and insurance costs

Before arriving at your warehouses, a sample of SebinoPack Big Bag undergoes rigorous testing in certified test chambers:

• Cyclic test: the bag is loaded and unloaded repeatedly to simulate future trips
• Tensile test: the bag is pulled until final breakage. Only if breakage occurs beyond the 6,000 kg threshold (for a SWL of 1,000 kg) does the lot receive the 6:1 certification

At SebinoPack, security is not an optional extra, but a millimeter science. Knowing that your material is literally “impossible to lose” under standard loads allows you to focus on what really matters: growing your business.