By simply coating a thin layer of 4,4’-diphenylmethane diisocyanate, polyacrylic acid and borax on the surface of PET film, a transparent PET film with extremely low gas vapor barrier value can be obtained. The oxygen transmission rate can be dramatically decreased to the detection limit of commercial instrumentation (<0.005 cc/m2/day).
- Mengze Lu
- Sheng Huang
- Yuezhong Meng