... wounded sheet), CF (centerfolded film), tube film, shrink bags Polyolefin shrink film ( Verified by SGS, FDA certificate)1. made of non-toxic material ... during the heat sealing process, thus it conformed to USA FDA requirement.2. Tight sealing and perfect welding performance3. High shrinkage ... micron, 30 micronSingle wounded sheet, centerfolded film, tube film and shrink bags shrink wrap film