Polylactic acid (PLA) jẹ polyester aliphatic thermoplastic.Lactic acid tabi lactide ti o nilo fun iṣelọpọ ti polylactic acid le ṣee gba nipasẹ bakteria, gbígbẹ ati isọdi awọn orisun isọdọtun.Polylactic acid ti o gba ni gbogbogbo ni awọn ohun-ini iṣelọpọ ti o dara ati awọn ọja polylactic acid le jẹ ibajẹ ni iyara ni awọn ọna pupọ lẹhin sisọnu.