Pyromellitic dianhydride(PMDA) ndi gulu lazinthu zambiri lomwe limagwira ntchito yofunika kwambiri popanga utomoni wa polyimide wosamva kutentha, mafilimu, ndi zokutira.Makhalidwe ake apadera amapangitsa kuti ikhale yofunikira kwambiri pamapulogalamu osiyanasiyana apamwamba, kuyambira pama board osinthika osindikizira kupita ku waya wa enameled.Tiyeni tione mwatsatanetsatane zomwe PMDA angakwanitse komanso momwe zimakhudzira makampani.
PMDA ndi gawo lapakati pakupanga mafilimu a polyimide, omwe amadziwika chifukwa cha kukhazikika kwawo kwamafuta komanso mphamvu zamakina.Mafilimuwa amagwiritsidwa ntchito kwambiri m'mabokosi osindikizira osinthika ndipo amatha kutumizira ma siginecha amagetsi mosasunthika pomwe akupirira kutentha kwambiri.Kuonjezera apo, mafilimu a polyimide opangidwa ndi PMDA ndi zigawo za matepi odziphatika okha, njira yofunikira pa msonkhano wa zipangizo zamagetsi.
Kuphatikiza apo, PMDA imathandizira kupanga zopangira zopangidwa ndi polyimide, kuwongolera mawonekedwe awo amatenthedwe ndi makina.Ma composites awa akufunika kwambiri kuti athe kupirira zovuta zogwirira ntchito, zomwe zimawapangitsa kukhala abwino pazamlengalenga, zamagalimoto ndi zamagetsi.Ma composites a PMDA-based polyimide ali ndi kutentha kwabwino kwambiri komanso kukhazikika kwa mawonekedwe, kuwapanga kukhala chisankho choyamba m'malo omwe zida zachikhalidwe sizikwanira.
Pankhani ya kusungunula waya wa enameled, PMDA imagwira ntchito yofunika kwambiri pakuwonetsetsa kuti nthawi yayitali komanso kudalirika kwamagetsi amagetsi.Pophatikizira PMDA muzinthu zotchingira, opanga amatha kupanga mawaya omwe amatha kupirira kutentha kwambiri komanso malo ovuta.Izi ndizofunikira makamaka m'mafakitale monga kupanga magetsi, komwe kufunikira kogwiritsa ntchito njira zodzitetezera kumafunika kwambiri.
Kuphatikiza apo, PMDA imathandizira kupanga zokutira zapamwamba kwambiri zokhala ndi kukana kwamafuta komanso kusakhazikika kwamankhwala.Zovala izi zimakhala ndi ntchito zosiyanasiyana, kuyambira pakuteteza zida zamafakitale m'malo otentha kwambiri mpaka kupereka zomaliza zokhazikika pamagetsi ogula.Zovala zopangidwa ndi PMDA zimatha kusunga umphumphu wawo pansi pa zovuta, zomwe zimawapangitsa kukhala chuma chamtengo wapatali m'mafakitale osiyanasiyana.
Pamene mafakitale akupitilira kukankhira malire a magwiridwe antchito ndi kudalirika, kufunikira kwa PMDA kukuyembekezeka kukwera.Zimagwira ntchito yosayerekezeka popanga zida zapamwamba zomwe zimagwira ntchito kwambiri.Kusinthasintha kwa PMDA popititsa patsogolo kutentha ndi makina azinthu za polyimide kumawonetsa kufunikira kwake pakuyendetsa zatsopano m'mafakitale angapo.
Mwachidule, pyromellitic dianhydride (PMDA) ndi mwala wapangodya wopangira zida zogwira ntchito kwambiri komanso kukana kwambiri kwamafuta komanso kukhulupirika kwamakina.Zotsatira zake zimamveka m'mafakitale ambiri kuyambira zamagetsi mpaka zamlengalenga, komwe kufunikira kwa mayankho odalirika komanso okhazikika sikungakambirane.Pamene kafukufuku ndi chitukuko chikupitirirabe, PMDA ikuyembekezeka kupitiriza kukhala chothandizira pazatsopano ndikukonzekera tsogolo la ntchito zapamwamba.
Nthawi yotumiza: Jun-25-2024