The rotomoulding process uses hollow metal moulds and a powdered polyethylene plastic that becomes liquid under high heat. The moulds with the liquid plastic inside are spun on both vertical and horizontal axis to form a uniform thickness, or skin on the outside walls, thus the name rotomoulding. The mould is removed from heat and allowed to cool under controlled conditions to avoid shrinkage or warp-age. The resulting polyethylene plastic is resistant to impact, most corrosive chemicals and temperature extremes. The slippery surface makes it very easy to clean. Polyethylene is also environmentally friendly because it can be recycled.
Most Polytank products are one-piece with no seams or sharp edges. The lightweight of polyethylene makes even large units easy to lift and move.
PolyDome has their own metal fabricating shop where they manufacture the frames, stands, and supports used with their aquaculture products. All metal parts are powder coated for corrosion resistance.
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