Polylactic acid (PLA) ndi mtundu watsopano wa zinthu zowola zomwe zimapangidwa kuchokera ku zinthu zachilengedwe komanso zowola zomwe zimawolanso, zomwe zimapangidwa kuchokera ku zinthu zopangira starch zomwe zimaperekedwa ndi zomera zongowolanso (monga chimanga, chinangwa, ndi zina). Zinthu zopangira starch zimasanduka shuga, kenako zimawiritsidwa kuchokera ku shuga ndi mitundu ina kuti zipange lactic acid yoyera kwambiri, kenako njira yopangira mankhwala imagwiritsidwa ntchito popanga polylactic acid yokhala ndi kulemera kwa molekyulu inayake. Ili ndi kuthekera kwabwino kowola, ndipo imatha kuwonongeka kwathunthu ndi tizilombo toyambitsa matenda m'chilengedwe pansi pa mikhalidwe inayake ikagwiritsidwa ntchito, pamapeto pake imapanga carbon dioxide ndi madzi, popanda kuipitsa chilengedwe, zomwe ndizothandiza kwambiri poteteza chilengedwe ndipo zimadziwika ngati zinthu zoteteza chilengedwe.
Asidi ya polylactic ili ndi kukhazikika kwa kutentha, kutentha kwake ndi 170 ~ 230℃, ndipo imakhala ndi kukana kwabwino kwa solvent. Itha kukonzedwa m'njira zosiyanasiyana, monga kutulutsa, kupota, kutambasula biaxial, ndi kupanga jakisoni. Kuwonjezera pa kukhala yosawonongeka, zinthu zopangidwa ndi polylactic acid zimakhala ndi kuyanjana kwabwino kwa biocompatibility, gloss, transparent, hand feel ndi kutentha, komanso kukana mabakiteriya ena, kukana malawi ndi kukana kwa UV, kotero ndizothandiza kwambiri. Zimagwiritsidwa ntchito kwambiri ngati zinthu zopakira, ulusi ndi zinthu zopanda nsalu, ndi zina zotero, zomwe zimagwiritsidwa ntchito kwambiri pa zovala (zovala zamkati, zovala zakunja), mafakitale (zomangamanga, ulimi, nkhalango, kupanga mapepala) ndi madera azachipatala ndi azaumoyo.
Nthawi yotumizira: Sep-19-2022
