PLA is a bio-friendly degradable material, which can be made from corn, sugarcane, wheat, potatoes, starch and other cellulose. PLA products can be degraded in various ways after being discarded. It has been widely used in biomedical engineering as surgical sutures, bone nails and bone plates and other common applications such as packaging bags, crop films, textile fibers, cold drink containers, tableware, straws, coated paper cups, sealing film, etc. PLA is now becoming one of the most common packaging materials.