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PRONAL flexible tanks are ideal for storing and transporting liquids (drinking water, hydrocarbons, chemical solutions, foodstuffs, industrial waste, sludge... ).
They are manufactured with elastomer or plastomer materials, depending on the application, and reinforced with high strength fabric. This is a simple economical solution.
Flexible tanks are used throughout the world and are suitable for thousands of users.
Advantages:
- lightweight,
- compact when folded,
- quick set up,
- no air inside the tank,
- a low-cost solution, no civil engineering required
A highly diversified range of products :
- ground storage up to 500,000 litres,
- can be transported on trucks, pick-ups, boats and aircraft, suspended under a helicopter or towed behind a vehicle,
- structured tanks and ferry fuel tanks for aeroplanes and helicopters, with anti-crash and self-sealing versions. |
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This storage tank for liquids or powdery products (water reserves, fish-breeding pools, safety sand vat, fertilizer, silo, effluent basin, storage of sludge cake) includes :
- A modular metal frame made out of galvanized steel assembled with bolts and nuts.
- A tight envelope made out of special polyester imputrescible cloth, coated with 1000 g/m2 PVC and reinforced by 2 welded belts.
The open vat is very light and no compact. It is very easy to clean in case of pollution of water by muds, leaves, sand, etc ... |
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THE MATERIAL
Butyl: The polymer butyl (IIR - isobutylene isoprene - rubber) is an elastomer with a small number of double bonds, produced through co-polymerisation of isobutylene and isoprene.
EPDM: The polymer EPDM, ethylene-propylene rubber, is produced through co-polymerisation of ethylene, propylene and diene monomer, producing a polymer made up of saturated linear macromolecules with a paraffinic structure.
In addition to the base polymer, both EPDM and Butyl contain reinforcing carbon black, fillers, process chemicals, antioxidants and vulcanising agents. After mixing the ingredients into a homogenous plastic compound, two layers of the rubber are rolled out in a calender to form a double sheet. Vulcanisation is then carried out. The long rubber molecules in the material are cross-linked through heat and pressure, creating an elastic membrane.
RESISTANT TO THE ENVIRONMENT
The vulcanisation process means that the material differs from all thermoplastic products, in that its properties are not affected by varying temperatures. The product is chemically stable and always returns to its original dimensions after stretching.
The cross-linked molecular structure gives EPDM and Butyl rubber their unique properties. Ageing or changes in characteristics are negligible despite decades of exposure to the atmosphere, sunlight, UV radiation, chemical fallout, water or major temperature fluctuations.
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