Polylactic acid (PLA), wotchedwanso polylactide, ndi aliphatic poliyesitala wopangidwa ndi kuchepa madzi m'thupi polymerization wa lactic acid opangidwa ndi tizilombo ting'onoting'ono nayonso mphamvu monga monoma. Imagwiritsa ntchito biomass zongowonjezwdwa monga chimanga, nzimbe ndi chinangwa monga zopangira, ndipo ili ndi magwero osiyanasiyana ndipo imatha kuwonjezedwanso. Kapangidwe ka asidi wa polylactic ndi wocheperako, wokonda zachilengedwe, komanso wocheperako. Mukagwiritsidwa ntchito, zinthu zake zimatha kupangidwa ndi kompositi ndikuwonongeka kuti zizindikire kuzungulira kwachilengedwe. Kuphatikiza apo, imagwiritsidwa ntchito kwambiri ndipo ili ndi mtengo wotsika kuposa mapulasitiki ena omwe amawonongeka monga PBAT, PBS, ndi PHA. Chifukwa chake, chakhala chinthu chogwira ntchito kwambiri komanso chomwe chikukula mwachangu kwambiri m'zaka zaposachedwa.

Kukula kwa polylactic acid kumayamikiridwa kwambiri padziko lonse lapansi. Mu 2019, ntchito zazikulu za PLA zapadziko lonse lapansi pakuyika ndi ma tableware, chithandizo chamankhwala ndiumwini, zinthu zamakanema, ndi misika ina yomaliza zidakhala 66%, 28%, 2%, ndi 3% motsatana.

Kugwiritsa ntchito msika wa polylactic acid kumayendetsedwabe ndi zida zotayira komanso zonyamula zakudya zokhala ndi shelufu yayifupi, ndikutsatiridwa ndi zida zokhazikika kapena zingapo. Mafilimu opangidwa ndi mafilimu monga matumba ogula ndi mulch amathandizidwa mwamphamvu ndi boma, ndipo kukula kwa msika kungakhale ndi kulumpha kwakukulu mu nthawi yochepa. Msika wazinthu zotayidwa za fiber monga matewera ndi zopukutira zaukhondo zitha kukweranso kwambiri malinga ndi malamulo, koma ukadaulo wake wophatikizika umafunikabe kuchita bwino. Zogulitsa zapadera, monga kusindikiza kwa 3D pang'ono koma mtengo wowonjezera, ndi zinthu zomwe zimafuna kugwiritsa ntchito nthawi yayitali kapena kutentha kwambiri, monga zamagetsi ndi zipangizo zamagalimoto.

Akuti mphamvu yopanga pachaka ya polylactic acid padziko lonse lapansi (kupatula China) ndi pafupifupi matani 150,000 ndipo zotulutsa pachaka zimakhala pafupifupi matani 120,000 isanafike 2015. Pankhani ya msika, kuyambira 2015 mpaka 2020, msika wapadziko lonse wa polylactic acid udzakula kwambiri. pamlingo wokulirapo pachaka pafupifupi 20%, ndipo chiyembekezo chamsika ndichabwino.
Ponena za madera, United States ndiyo yaikulu kwambiri yopanga polylactic acid, yotsatiridwa ndi China, yomwe ili ndi gawo la msika wa 14% mu 2018. Ponena za kugwiritsira ntchito m'madera, United States idakali ndi malo ake otsogolera. Panthawi imodzimodziyo, ilinso yaikulu kwambiri padziko lonse yogulitsa kunja. Mu 2018, msika wapadziko lonse wa polylactic acid (PLA) unali wamtengo wapatali $659 miliyoni. Monga pulasitiki yowonongeka ndi ntchito yabwino kwambiri. Ogulitsa pamsika ali ndi chiyembekezo pamsika wamtsogolo