Using newly developed manufacturing equipment as well as new raw material technology, ClearShield bags are made of a unique coextrusion of ethylene vinyl alcohol (oriented by means of a proprietary technology), polyethylene, and polyamide. The finished bags exhibit outstanding puncture resistance over 100% of the package structure, including the seal area, says Alcan. They have proven to reduce in-plant package leaker rates by more than 50% compared to standard patch bags. And the improved package integrity through distribution, wholesale, and retail channels extends product shelf life, cuts product waste, and enhances product marketability. The bags also exhibit superior clarity, high oxygen and moisture barrier, good shrink properties, and ease of machineability on existing shrink packaging equipment. Moreover, they bring savings in labor and cost of materials by eliminating patches, caps, and other extraneous wrapping mechanisms.
Well-suited for packaging applications such as bone-in beef, ham, steaks, and pork ribs, the bags also have significant potential for packaging a range of other sharp-edged products. First marketed in March 2004, these bags now enjoy broad commercial use by more than 20 packers, with that number growing monthly.
Alcan’s ClearShield bone-in shrink film bag is a recipient of a DuPont Silver Award.
—Judy Rice
