Technology's Edge September 2010

When it comes to the products, the ROSO method used to be limited almost exclusively to –polypropylene (PP) and to just a few suppliers. The low shrinkage of classic PP-MD shrink films—20 percent at the maximum at temperatures up to 100°C [212°F]—restricted the use of this method to bottles with simple shapes. Due to its low shrinkage, a PP-MD film cannot tightly enough hug the contour of complex shapes that have greatly varying radii.