Lidding materials

Common lidding materials include medical-grade paper, nonwovens, aluminum foil, and multilayer films, each selected based on factors such as barrier performance, breathability, and compatibility with sealing and sterilization methods. They are often paired with rigid or flexible bottom webs in tray or pouch packaging to create a complete sterile barrier system.

Lidding materials are a critical component of sterile medical device packaging, providing a secure and protective seal while allowing easy and aseptic product access. These materials are engineered to maintain sterility, withstand various sterilization processes, and ensure product integrity throughout storage and transportation.

Common lidding materials include medical-grade uncoated and coated papers, reinforced paper grades, and coated nonwovens, as well as aluminum foil and multilayer films, each selected based on factors such as barrier performance, breathability, and compatibility with sealing and sterilization methods. They are often paired with rigid or flexible bottom webs in tray or pouch packaging to create a complete sterile barrier system.

Key attributes of high-quality lidding materials include strong seal integrity, easy peelability, and resistance to punctures or tears. As sustainability becomes a priority, manufacturers are also developing more eco-friendly alternatives while maintaining compliance with stringent medical packaging regulations.

Lidding Materials

Property/Material	Uncoated paper	Coated Paper	Coated non -woven materials of polyolefin	Reinforced Paper grades
Hard/heavy products	No	No	Yes	OK
High-speed packaging	OK	Yes	Yes	No
Deep-formed trays	No	OK	Yes	Yes
Rigid base-webs	No	Care required	Yes	Yes
Risk of temperatures >60’C	Yes	No	Some	Care required
Non-Pe sealing webs	No	Care required	Yes	No
Radiation sterilisation	Yes	Yes	Yes	Yes
EtO Ster’n	Yes	Yes	Yes	Yes
Steam sterilisation	Some	No	Yes max T 124 degrees C (not suitable for hospitals)	No