What Is IML? Definition, Benefits and Typical Products
IML combines screen printing, forming and injection molding to decorate 3D plastic parts with registered colors, backlighting and graphics on curved surfaces, replacing heat transfer, spraying, plating or two-shot molding.

IML is an in-mold decoration technology that combines screen printing, forming and injection molding. It is an effective and cost-saving way to decorate plastic parts.
Which parts it suits
IML is best for 3D parts, especially cosmetic parts that need consistent registered colors, backlighting or multiple colors on curved, arched or sloped surfaces.
Main benefits
- High clarity and a strong 3D look.
- Scratch- and wear-resistant surface.
- Designs and graphics can be changed easily.
- Complex shapes and multiple colors that flat acrylic panels cannot achieve.
Processes it can replace
Heat transfer, direct surface printing, spray painting, direct plating and two-shot molding.
Applications
- Telecom: phone lenses, panels, trim and housings.
- Appliances: window panels, key panels, decorative panels.
- Medical devices: window lenses, housings, trim.
- Digital products and automotive dashboards.
IML film forming: IML panel hot press, IML smart-lock panel hot press. Process: IMD/IML thermoforming machines: process and applications.
Adapted from an article published on SANSEN's original Chinese website (sansendg.com) on 2019-04-14. The text was edited and restructured; technical content follows the original.