Polyvinyl kolorayidi (PVC) ndi polima opangidwa ndi polymerization wa vinilu kolorayidi monoma (VCM) pamaso pa intiators monga peroxides ndi mankhwala mankhwala kapena ndi limagwirira ufulu kwakukulu ma polymerization pansi pa kuwala kapena kutentha. PVC ndi zinthu za polima zomwe zimagwiritsa ntchito atomu ya chlorine m'malo mwa atomu ya haidrojeni mu polyethylene, ndipo vinyl chloride homopolymers ndi vinyl chloride copolymers onse pamodzi amatchedwa vinyl chloride resins.
Maunyolo a PVC amakhala ndi maatomu amphamvu kwambiri a chlorine okhala ndi mphamvu zambiri zapakati, zomwe zimapangitsa kuti zinthu za PVC zikhale zolimba, zolimba, komanso zomveka mwamakina, komanso zimakhala zochedwa kwambiri lawi (lawi lamoto limatanthawuza malo omwe chinthu chili nacho kapena chomwe chinthu chimakhala nacho pambuyo pochiza. kuchedwa kwambiri kufalikira kwa lawi); komabe, ma dielectric okhazikika komanso ma dielectric loss angle tangent values ndi akulu kuposa a PE.
Utoto wa PVC uli ndi zomangira zocheperapo ziwiri, unyolo wanthambi ndi zotsalira zoyambira zomwe zimasiyidwa mu polymerization, kuphatikiza ma atomu a chlorine ndi haidrojeni pakati pa maatomu awiri oyandikana a kaboni, omwe amachotsedwa mosavuta, zomwe zimapangitsa kuti PVC iwonongeke mosavuta. wa kuwala ndi kutentha. Choncho, mankhwala PVC ayenera kuwonjezera kutentha stabilizers, monga kashiamu-zinki kutentha stabilizer, barium-zinki kutentha stabilizer, kutsogolera mchere kutentha stabilizer, organic malata stabilizer, etc.
Ntchito zazikulu
PVC imabwera m'njira zosiyanasiyana ndipo imatha kukonzedwa m'njira zosiyanasiyana, kuphatikiza kukanikiza, kutulutsa, kubayidwa, ndi zokutira. PVC mapulasitiki amagwiritsidwa ntchito popanga mafilimu, zikopa yokumba, kutchinjiriza wa mawaya ndi zingwe, mankhwala okhwima, pansi, mipando, zipangizo masewera, etc.
Zogulitsa za PVC nthawi zambiri zimagawidwa m'magulu atatu: okhazikika, okhazikika komanso ofewa. Zinthu zolimba komanso zokhazikika zimakonzedwa popanda kapena ndi pulasitiki pang'ono, pomwe zofewa zimakonzedwa ndi pulasitiki wambiri. Pambuyo powonjezera mapulasitiki, kutentha kwa magalasi kungathe kuchepetsedwa, zomwe zimapangitsa kuti zikhale zosavuta kuzikonza pa kutentha kochepa ndikuwonjezera kusinthasintha ndi pulasitiki ya unyolo wa maselo, ndikupangitsa kuti zikhale zotheka kupanga zinthu zofewa zomwe zimasinthasintha kutentha.
1. Mbiri ya PVC
Amagwiritsidwa ntchito makamaka popanga zitseko ndi mazenera ndi zida zopulumutsa mphamvu.
2. mapaipi a PVC
Mapaipi a PVC ali ndi mitundu yambiri, magwiridwe antchito abwino komanso osiyanasiyana ogwiritsidwa ntchito, ndipo amakhala ndi udindo wofunikira pamsika.
3. Mafilimu a PVC
PVC ikhoza kupangidwa kukhala filimu yowonekera kapena yamitundu ya makulidwe odziwika pogwiritsa ntchito kalendala, ndipo filimu yopangidwa ndi njirayi imatchedwa filimu ya calendered. PVC granular zopangira amathanso kuwomberedwa mu filimu pogwiritsa ntchito makina owuma nkhonya, ndipo filimu yopangidwa ndi njirayi imatchedwa filimu yowumba. Firimuyi ingagwiritsidwe ntchito pazinthu zambiri ndipo ikhoza kusinthidwa kukhala matumba, malaya amvula, nsalu za tebulo, makatani, zoseweretsa zotsekemera, ndi zina zotero mwa kudula ndi kusindikiza kutentha. Makanema owoneka bwino atha kugwiritsidwa ntchito pomanga ma greenhouses ndi ma greenhouses apulasitiki, kapena kugwiritsidwa ntchito ngati mafilimu apansi.
4. PVC bolodi
Kuwonjezedwa ndi stabilizer, lubricant ndi filler, ndipo pambuyo kusakaniza, PVC akhoza extruded mu osiyanasiyana caliber mipope zolimba, mipope zooneka ndi malata ndi extruder, ndi ntchito ngati downpipe, madzi akumwa chitoliro, magetsi waya casing kapena staircase handrail. Mapepala a calender amapindika ndikuwotcha kuti apange mapepala olimba a makulidwe osiyanasiyana. Mapepalawa amatha kudulidwa m'mawonekedwe omwe amafunidwa kenako kuwotcherera ndi mpweya wotentha pogwiritsa ntchito ndodo zowotcherera za PVC kukhala matanki osungira osiyanasiyana osagwira mankhwala, ma ducts ndi zotengera, ndi zina zambiri.
5. PVC zofewa mankhwala
Pogwiritsa ntchito extruder, akhoza extruded mu hoses, zingwe, mawaya, etc.; pogwiritsa ntchito makina opangira jakisoni okhala ndi nkhungu zosiyanasiyana, amatha kupangidwa kukhala nsapato za pulasitiki, nsapato za nsapato, ma slippers, zoseweretsa, zida zamagalimoto, ndi zina zambiri.
6. PVC ma CD zipangizo
PVC mankhwala kwa ma CD makamaka zosiyanasiyana muli, filimu ndi pepala zolimba. Zotengera za PVC zimapangidwa makamaka ndi madzi amchere, zakumwa, mabotolo odzikongoletsera, komanso zopangira mafuta oyengeka.
7. PVC siding ndi pansi
PVC siding zimagwiritsa ntchito m'malo zotayidwa siding, PVC matailosi pansi, kupatulapo mbali ya PVC utomoni, ena onse zigawo zikuluzikulu ndi zobwezerezedwanso zipangizo, zomatira, fillers ndi zigawo zina, makamaka ntchito mu bwalo la ndege otsiriza pansi ndi malo ena olimba. pansi.
8. PVC ogula mankhwala
Zogulitsa za PVC zitha kupezeka kulikonse m'moyo wathu watsiku ndi tsiku. PVC imagwiritsidwa ntchito popanga zikopa zopanga zosiyanasiyana zamatumba onyamula katundu, zinthu zamasewera monga basketballs, mipira ya mpira ndi mipira ya rugby. Amagwiritsidwanso ntchito popanga yunifolomu ndi malamba apadera odzitetezera. Nsalu za PVC zopangira zovala nthawi zambiri zimakhala zoyamwa (palibe zokutira) monga ma poncho, mathalauza a ana, ma jekete achikopa ochita kupanga ndi nsapato zamvula zosiyanasiyana. PVC imagwiritsidwanso ntchito pazinthu zambiri zamasewera ndi zosangalatsa monga zoseweretsa, zolemba ndi zinthu zamasewera.
Nthawi yotumiza: Jul-19-2023