The ideal choice for non-hazardous chemical and food-grade products — the Flexitank delivers higher payload, lower cost, and full regulatory compliance in a single-use, recyclable format.
Every Sun Flexitank is manufactured to stringent international standards across both structural layers — inner co-extruded polyethylene and outer woven polypropylene.
| Dimension | Parameter | Unit | Test Method |
|---|---|---|---|
| Thickness | 125/ply | Micron | — |
| No. of Layers | 4 | Ply | — |
| Total Weight | 30 | Kg | — |
| Tensile Strength (TD) | 30 | MPa | ASTM D88 |
| Tensile Strength (MD) | 35 | MPa | ASTM D88 |
| Elongation at Break (TD) | 550 | % | ASTM D1709 |
| Elongation at Break (MD) | 650 | % | ASTM D1709 |
| Dart Drop | 1400 | GR | ASTM D1709 |
| Min. Temperature | −25 | °C | — |
| Max. Temperature | 85 | °C | — |
The inner layers consist of 4 sleeves of tubular, co-extruded polyethylene — the primary containment barrier for bulk liquid cargo. Each sleeve is manufactured to tight tolerances ensuring consistent wall strength and puncture resistance throughout transit.
With a maximum operating temperature of 85°C, the inner layer is suitable for a wide range of food-grade and non-hazardous chemical cargoes, including viscous liquids requiring heating during discharge.
| Dimension | Parameter | Unit | Test Method |
|---|---|---|---|
| No. of Layers | 1 | Ply | — |
| Weight | 180 | g/m² | — |
| Coating Weight | 30 | g/m² | — |
| Tensile Strength (TD) | 1800 | N/50mm | DIN 53354 |
| Tensile Strength (MD) | 1600 | N/50mm | DIN 53354 |
| Elongation at Break (TD) | 30 | % | DIN 53354 |
| Elongation at Break (MD) | 30 | % | DIN 53354 |
The outer layer is a single sleeve of continuous woven polypropylene — providing the structural strength required to withstand the pressures of a fully loaded 20ft container throughout its journey.
With tensile strength of 1,800 N/50mm (TD) and a 30 g/m² protective coating, this layer ensures the Flexitank holds its form from filling through to discharge at destination.
Sun Flexitanks support three configurations to suit your filling and discharge infrastructure — giving you full flexibility at origin and destination.
Sun Flexitanks feature built-in automatic air vent technology — a key safety and performance advantage over standard flexitanks.
Every Flexitank ships complete with a full bulkhead accessory kit — everything needed for a safe, compliant container installation.
The Vinotank meets the highest international standards for food-contact bulk liquid packaging.
Everything you need to know before your first Flexitank shipment.
For decades, steel drums were the default choice for shipping bulk liquids. Here's why flexitanks are rapidly taking over.
A well-loaded, properly discharged flexitank is a seamless operation. Here's everything you need to know at each stage.
The COA Flexitank Quality List is the industry's most important quality benchmark. Here's what it covers and why it matters for your shipment.
More answers in our frequently asked questions, or read about Sun Flexitanks and our 20+ years in bulk liquid transport.
