Trexel, Inc has introduced its MuCell 3D In-Mold-Labeling (IML) process for packaging applications. This process creates the look of embossed labeling on the package without any need for additional tooling costs. Instead the “embossed” look comes from the enablement of 3D labels.
The 3D IML combines MuCell technology with IML label technology to offer a special visual appearance and soft touch effect to 
packages, providing differentiation without changing the container shape. The 3D in-mold label is processed with an injection-molded tub made of expanded polypropylene to incorporate selective masking, creating areas without adhesion. The MuCell process controls the introduction of nitrogen into the polymer. Where there is adhesion between the label and the polymer, the nitrogen migrates through both structures. Where there is no adhesion (by design behind the blue lettering), the nitrogen accumulates between the polymer substrate and the label. The process creates bubble patterns or Braille for a multi-sensory experience.
An application using this process, the Paccor/Unilever 500g polypropylene Margarine Tub with 3D IML, won the DuPont Packaging Silver Award in 2013. This application also featured 6% material reduction, 40% clamp tonnage reduction and 15% cavity pressure reduction.
www.trexel.com
3D in mold labeling can be achieved with no additional set up or tooling costs (photo: Trexel)
