Biobased Films with Improved Oxygen Barrier

Executive Summary

Biobased materials such as polybutylene adipate terephthalate (PBAT), polyglycolic acid (PGA) and polybutylene succinate (PBS) are attractive materials for packaging films due to their positive sustainability aspects including biodegradability. However, their oxygen barrier properties limit the use of these materials to certain applications. Researchers at Michigan State University have recently developed a new film technology that improves oxygen and water barrier in biobased polyesters, thus providing a sustainable packaging solution for a broader range of applications then currently possible.


Description of the Technology

The technology is a based on processing modifications and the addition of an additive package to polyesters. Specifically, work has been done with PBAT, PGA and PBS materials and their blends. The films have oxygen transmission rates (OTR) down to 0.43 cc*mm/m2/24 hour (@50% RH, 23*C) and water vapor transmission rate (WVTR) down to 0.6 g*mm/m2/24 h (@90% RH, 38*C) in unstretched state. The films also meeting other packaging requirements such as tensile strength, sealing, puncture resistance, etc.



  • Biodegradable
  • Recyclable
  • Improves oxygen and water vapor barrier



  • Single layer or multilayer films
  • Flexible or rigid packaging


Patent Status

  • Patent pending


Licensing Rights

Full licensing rights available



Dr. Muhammad Rabnawaz, Dr. Mohamed Abdelwahab




Patent Information:

For Information, Contact:

Jon Debling
Technology Manager
Michigan State University