| abstract |
At least one layer comprising biodegradable polymer and surface treated nanoclay particles or PVOH grafted with a cross linker and PVOH grafted with at least one layer or cross linker comprising 'PBS or PBSA' and 'PBS or PBSA' Or at least one layer comprising a combination of a biodegradable polymer and surface treated nanoclay particles, or at least one layer comprising PVOH grafted with a cross linker and ' PBS or PBSA '. |