Traditional cellophane films are largely based on renewable cellulose, but they don’t meet the latest strict standard for biodegradability and compostability (ASTM D6400). That led Innovia Films Inc. in the U.K. (U.S. office in Atlanta) to develop coated cellulose films that do comply. Innovia introduced these NatureFlex films in Europe in 2003 and is now preparing to make them in a former Flexel cellulose plant it acquired in Kansas. NatureFlex films can be made with permeable coatings for produce wrap. Glossy metalized barrier versions have such a thin coating (a few tenths of a nanometer) of vacuum-deposited aluminum that they still meet compostability standards. The latest addition is Natureflex NK with coatings for high moisture and oxygen barrier. It comes in 80 to 180 gauge with typical moisture barrier of 0.65 g/100 in.2/day (at 100 F, 90% RH) and oxygen barrier of 0.2 cc/100 in.2/day (at 75 F, 0% RH). (877) 822-3456 • www.innoviafilms.com
Editor PickSizing the Barrier Gap
Here’s a less complex way to properly size the barrier gap for barrier screws.