Polylactic acid (PLA) ndi mtundu watsopano wa zinthu zomwe zimatha kuwonongeka ndi biodegradable, zomwe zimapangidwa kuchokera ku zowuma zowuma zomwe zimaperekedwa ndi zomera zongowonjezwdwa (monga chimanga, chinangwa, ndi zina zotero). Wowuma zopangira ndi saccharified kuti apeze shuga, ndiyeno thovu ku shuga ndi zina tizilombo toyambitsa mkulu-kuyera lactic acid, ndiyeno mankhwala kaphatikizidwe njira ntchito synthesize asidi polylactic ndi ena maselo kulemera. Lili ndi biodegradability wabwino, ndipo akhoza kuonongeka kotheratu ndi tizilombo m'chilengedwe pansi pa mikhalidwe yeniyeni pambuyo ntchito, potsirizira pake kutulutsa mpweya woipa ndi madzi, popanda kuipitsa chilengedwe, amene n'kopindulitsa kwambiri poteteza chilengedwe ndipo anazindikira ngati zinthu zachilengedwe wochezeka.
asidi polylactic ali wabwino matenthedwe bata, kutentha processing ndi 170 ~ 230 ℃, ndipo ali ndi kukana zabwino zosungunulira. Ikhoza kukonzedwa m'njira zosiyanasiyana, monga extrusion, kupota, kutambasula kwa biaxial, ndi kuumba jekeseni. Kuphatikiza pa kukhala biodegradable, mankhwala opangidwa ndi asidi polylactic ndi wabwino biocompatibility, gloss, transparency, manja kumva ndi kutentha kukana, komanso mabakiteriya kukana, retardancy lawi ndi UV kukana, kotero iwo ndi zothandiza kwambiri. Amagwiritsidwa ntchito kwambiri ngati zonyamula katundu, ulusi ndi nonwovens, etc., panopa makamaka ntchito zovala (zamkati, kunja), mafakitale (zomangamanga, ulimi, nkhalango, papermaking) ndi mankhwala ndi thanzi.
Nthawi yotumiza: Sep-19-2022