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Developed almost 40 years ago, American-made Whirl-Pak® bags were the first sterile sample bags on the market. They were designed to provide milk haulers with a container for collecting samples of bulk produced milk. Whirl-Pak® bags made possible the “universal sample system”, which means that a single sample can be used for all tests required for quality control, product content, and legal compliance. Whirl-Pak® sample bags are made from blended virgin, low-density polyethylene, giving the bags two important characteristics:
Exceptionally clear film – easy to see through
Superior strength – unbreakable sample container
They may be used for taking samples of liquids, semi-solids, or solids. Whirl-Pak® bags are patented under Patent No. 2,973,131 and other patents pending. The film thickness varies from 2.25 mil (.057 mm) to 4 mil
(.102 mm) depending on the size and style. Because of the high quality blended polyethylene, a high mil thickness is not required to achieve optimum strength.
