A half-dozen processors in the U.S. are testing small amounts of hollow polyacrylonitrile microspheres from Akzo Nobel’s Expancel Div. in Duluth, Ga., to make paper-like films that insulate hot food. Tests include one-, three-, and five-layer films with Expancel loadings from 0.25% up to 3.5%. The higher loadings make film cloudy and also double its thickness. Applications under market testing include shrink wrap for hot carryout foods. Very low loadings in the middle layer of a three-layer film result in slight surface bumps, which impart anti-block properties. Three blown film products containing Expancel are in market testing now. (770) 813-9126 • www.expancel.com
Ryka Blow Molds Inc.
1608 Bonhill Rd. Mississauga L5T 1C7, Ontario, Canada
Phone (905) 670-1450 Fax (905) 670-2621
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Here’s a less complex way to properly size the barrier gap for barrier screws.