There is no type of plastic suitable for home-composting. There is no Standard for this and it would be dangerous to try to create one, because composting has to be carefully managed to create and maintain the conditions prescribed by a Standard, and this cannot be expected from home composters, most of whom will not even read the Standard. The result will be that fragments of plastic will get into the compost. Home composting has been used for grass and other garden wastes for many years but it is not suitable for kitchen waste, because temperatures are not likely to be high enough to kill the pathogens, and an incorrectly managed composting unit will attract rats, foxes, and other vermin. There is in any event no need for an expensive plastic bag for conveying organic waste to the bottom of the garden, when a bucket would serve the purpose equally well. “Compostable plastic” does not convert into compost because EN13432 requires it to convert into CO2 gas within 180 days so it contributes to climate change but does nothing for the soil. Even when “compostable” plastic is introduced into industrial composting, the results are not satisfactory. See the report 15.12.14 for ADEME in France.
Even when “compostable” plastic is introduced into industrial composting, the results are not satisfactory.