When it comes to food-grade bulk liquid transport, hygiene isn't just a preference — it's a regulatory requirement. Here's why gamma irradiation matters.
When it comes to food-grade bulk liquid transport, hygiene isn't just a preference — it's a regulatory requirement. The cargo going into a flexitank might be fruit juice destined for supermarket shelves, wine heading to a bottling plant, or dairy products bound for food manufacturers. In every case, the integrity of the container is non-negotiable.
This is where gamma irradiation comes in — and why Sun Flexitanks uses it as a standard part of the manufacturing process for its food-grade flexitank range.
Gamma irradiation is a sterilisation method that uses ionizing radiation to eliminate microorganisms. The gamma rays penetrate the material and disrupt the DNA of any biological contaminants present — bacteria, fungi, parasites, and other pathogens — rendering them unable to survive or reproduce.
It's the same technology used to sterilise medical devices, pharmaceutical packaging, and food contact materials worldwide. It leaves no chemical residue, requires no heat, and doesn't affect the structural integrity of the flexitank material. Once irradiated, the flexitank is effectively sterile — and remains so until opened.
A standard flexitank that hasn't been gamma irradiated may still be perfectly suitable for non-food cargo. But for food-grade applications, the stakes are different. Any microbial contamination inside the flexitank — however minor — has the potential to compromise the entire cargo load. At volumes of up to 24,000 litres per container, that's an expensive and potentially serious problem.
Gamma irradiation eliminates that risk at source. It gives food manufacturers, wine producers, juice exporters, and dairy processors the assurance that the container their product is travelling in meets the highest possible hygiene standard before a single litre is loaded.
With over 20 years in the flexitank industry, Sun Flexitanks has built its food-grade product range — including the Vinotank and Reefer Flexitank — around the most rigorous compliance standards available. Gamma irradiation is one part of a broader quality framework that includes ISO 9001, ISO 14001, ISO 22000, FDA compliance, and COA Flexitank Quality List certification.
Every material used in Sun's food-grade flexitanks is manufactured from virgin, co-extruded polyethylene — chosen specifically for its food safety properties — and undergoes testing before construction. Gamma irradiation is the final step that ensures what leaves our facility is genuinely fit for food contact.
For shippers moving food-grade bulk liquids, gamma irradiation isn't a nice-to-have — it's a mark of a manufacturer that takes food safety seriously. It's one of the reasons Sun Flexitanks has earned the trust of food-grade exporters across Europe, South America, Africa, Oceania, and the MENA region over more than two decades in the industry.
Talk to the Sun Flexitanks team about the right solution for your cargo.