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.
pacity is measured in fluid ounces when the bag is closed and tab is folded over three times. Volume and dimensions are approximate; bags should not be used at temperatures above 180° F (82° C). Bags can be frozen to any temperature, even liquid nitrogen - careful handling required after freezing. All bags are sterilized after manufacturing.
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