The Wellington County Beekeepers’ Association is generously coordinating the winter wrap program, with proceeds supporting the OBA Tech-Transfer Research Program.
In 2007, Jim Coneybeare and Diane Krout of the Wellington County Beekeepers organized the manufacture of these wraps and have made them available to Ontario Beekeepers each year since then.
These wraps are made of 4mm black polypropylene (corrugated plastic) with 5% U.V. protection. Polypropylene Copolymer is used for indoor and outdoor signs and packaging. They are lightweight and are designed to fold and store flat. Polypropylene has been tested to have little water absorption in 24 hours - .02% compared with 75% for (presumably unwaxed) cardboard in 50% relative humidity. It will withstand temperature extremes from -17F to 230F. Folds have a living hinge of 21,000 cycles.
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Source : Ontario Beekeepers Association