|Dick Johanneck started Polytank, Inc. in 1972 doing custom
rotomoulding. In 1977, he began making calf hutches which became known as Poly Dome Calf
Nurseries. The agricultural products division of Polytank was later named
PolyDome. Since that time, Polytank and PolyDome have added over 200
products to their line. Polytank has dealers across the United States,
Canada and 10 foreign countries.
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 head and allowed to cool under
controlled conditions to avoid shrinkage or warpage. 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 PolyDome 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 from frames, stands, and
supports used with their agricultural products. All metal parts are powder
coated for corrosion resistance.