The Rotomoulded IBCs from VARIBOX is the evolution of more than 50 years of experience in designing and manufacturing rotomoulded chemical containers. “Shaping Plastics Beyond The Obvious” is our approach that has resulted in the development of products that have been awarded numerous prices for innovative packaging. After our first award-winning product was introduced in 1958, many others followed, like Multibox, Varitainer, Chemtainer, Palletank, Varicube, Bonbonne, CKMB, MultiWay, iCon, and now VARIBOX. All are manufactured with the rotomoulding process.
What is rotomoulding?
Rotomoulding, is a process for producing components from thermoplastics. lt is also known as rotational moulding, rotational sintering, rotocasting or spin casting.
Every product design requires its own metal mould. This mould is mounted on a rotomoulding machine and charged with raw material in powder form.
The mould is then moved in a moulding oven while constantly being rotated on two axes. The plastic powder in the mould melts and adheres to the inside of the mould, building up the required wall thickness of the plastic product.
The rotating mould is then cooled down to gradually solidify the plastic material inside.
The product is removed from the mould and the mould is re-charged to produce the next product.
Rotomoulding is a pressure-free process: without force, the powder sinters together to build a layer, rather than being forced into shape like in blow-molding or injection-molding processes.
Rotomoulding vs. blow-molding
The rotomoulding manufacturing technology delivers IBCs with good rigidity and very high impact strength. The lighter caged plastic IBCs are made by blow molding and have steel cages. These blow-molded caged IBCs are mainly used for oneway use or limited reuse. The rotomolded VARIBOX IBC is made to last: the wall thickness of the container is considerably higher compared to the blow-molded ones. There is no corroding exterior cage and its heavy-duty rotomolded pallet can deal with intensive reuse.
Chemical resistance of our Rotomoulded IBCs
Unlike blow-moulding, the rotomoulding process results in virtually stress-free products. This improves the chemical resistance against substances that cause cracking in polyethylene under stress. The material used is LLDPE (Linear low density Polyethylene). Rotomolded polyethylene IBCs also have a high resistance against molecular degradation caused by strong acids. These properties result in a very good resistance against a broad range of chemicals. This includes substances like sulfuric acid, nitric acid, sodium hypochlorite, and sodium hydroxide. Making the VARIBOX the preferred choice for chemical transport, storage and re-use.