Bio based PA11 film contains 48% of bio based material which comes from castor oil. Castor is an alternative to fossil fuels due to the nature of thriving in the draught-prone area with a short cultivation period. Moreover, since castor is commonly used in cleaning products therefore no food competition issue. This bio based PA11 film can effectively combine high performance and ecofriendly concept, it’s a new and innovative green functional product for this new era.