Kodi mungasankhe bwanji chokhazikika kutentha cha PVC?

1, Fotokozani zochitika za ntchito ndi zofunikira pakugwira ntchito
1. Chakudya/Zamankhwala
Konzani kugwiritsa ntchito zinthu zokhazikika za organotin (mercaptan methyl tin), zomwe zimakwaniritsa miyezo ya FDA ndipo zimakhala zowonekera bwino, zoyenera zinthu zowonekera za PVC, mafilimu opaka chakudya, ndi zina zotero; Njira zina zimaphatikizapo zinthu zokhazikika za calcium zinc, zomwe ziyenera kutsimikiziridwa ndi REACH, LFGB, ndi miyezo ina kuti zikwaniritse zofunikira zosamukira zomwe sizili ndi poizoni.
2. Zipangizo Zomangira/Zamakampani
Mapaipi olimba ndi mbale: Ndikofunikira kugwiritsa ntchito zolimbitsa mchere wa lead (zotsika mtengo, zokhazikika kwambiri pa kutentha), koma chisamaliro chiyenera kuperekedwa ku zofooka zake zachilengedwe.
2, Kuwunika malamulo okhudza chilengedwe ndi chitetezo
1. Kutsatira malamulo okhudza chilengedwe:
Zokhazikika zopanda lead komanso zopanda cadmium monga calcium zinc composite kapena organotin stabilizers ndizofunikira kuti zitumizidwe ku European Union kapena m'magawo azachipatala.
Pewani zinthu zolimbitsa mchere wa lead (zoopsa kwambiri) ndipo sankhani zinthu zomwe zimagwirizana ndi miyezo ya ROHS ndi REACH.
2. Chitetezo cha kukhudzana: Kuchuluka kwa zinthu zokhazikika kuyenera kutsimikiziridwa kuti zigwiritsidwe ntchito pokonza chakudya, ndipo ma formula okhala ndi mamolekyulu ambiri ayenera kusankhidwa.
3, ukadaulo wofananiza wokonza ndi dongosolo lopaka mafuta
1. Kusintha njira zogwirira ntchito
Kutulutsa/kupangira jakisoni: Zolimbitsa zitini zachilengedwe ziyenera kuphatikizidwa ndi njira yothira mafuta ya paraffin sera + calcium stearate, ndipo kuchuluka kwa mafuta owonjezera akunja kuyenera kulamulidwa pa magawo 0.1-0.5 kuti tipewe kufalikira kosagwirizana;
Kuzungulira/kupsa: Zolimbitsa thupi za calcium zinc ziyenera kuphatikizidwa ndi mafuta otentha kwambiri monga sera wa polyethylene kuti zisasungunuke kwambiri;
Kukonza magawo a njira: Kukonza kutentha kwambiri (kupitirira 200 ℃) kumafuna kugwiritsa ntchito zokhazikika zoteteza kutentha (monga organotin, ndi zina zotero) kuti muchepetse mphamvu yayikulu ya kusungunuka ndi kupitirira 15%. Zinthu zowonekera bwino ziyenera kuwongolera kugwirizana pakati pa zokhazikika ndi ma resin kuti mupewe mvula komanso kuwonjezeka kwa chifunga ndi 37.
4, njira zotsimikizira ndi kuyesa
Mayeso okhazikika pa kutentha: Ikani chitsanzo cha PVC chokhala ndi chokhazikika pa 80 ℃ kwa maola 48 ndikuwona kusintha kwa mtundu.
Kuyerekeza kukana kwa nyengo: Yesani momwe chitetezo cha UV chimakhudzira pogwiritsa ntchito mayeso a ukalamba a QUV, zomwe zimafuna kuti mphamvu yogwira ntchito ikhale yochepera 85% patatha maola 5000.
Kutsimikizira momwe zinthu zilili: Gwiritsani ntchito torque rheometer kuti muwone momwe zinthu zimayendera komanso momwe zimakhalira ndi mafuta ndi stabilizer.