Njira Zokulitsira Katundu wa PVC - Udindo wa Zowonjezera.

PVC utomoni wopezedwa polymerization ndi wosakhazikika kwambiri chifukwa chotsika bata ndi kusungunuka kwamphamvu kusungunuka.Iyenera kusinthidwa isanakonzedwe kukhala zinthu zomalizidwa.Makhalidwe ake amatha kupitilizidwa / kusinthidwa powonjezera zowonjezera zingapo, monga zolimbitsa kutentha, zolimbitsa thupi za UV, mapulasitiki, zosinthira mphamvu, zodzaza, zoletsa moto, ma pigment, ndi zina zambiri.

Kusankhidwa kwa zowonjezera izi kuti zikweze katundu wa polima zimatengera kufunikira kwa ntchito yomaliza.Mwachitsanzo:

1.Plasticizers (Phthalates, Adipates, Trimellitate, etc.) amagwiritsidwa ntchito monga zofewetsa kuti apititse patsogolo rheological komanso makina opangira (kulimba, mphamvu) za vinyl mankhwala pokweza kutentha.Zomwe zimakhudza kusankha kwa mapulasitiki a vinyl polima ndi: Kugwirizana kwapolima; kutsika kosasunthika; mtengo.

2.PVC imakhala ndi kukhazikika kwamafuta ochepa kwambiri ndipo zolimbitsa thupi zimathandiza kupewa kuwonongeka kwa polima panthawi yokonza kapena kuyatsa.Ikatenthedwa, ma vinilu amadzimadzi amayamba kudzipangira okha dehydrochlorination reaction ndipo zokhazikika izi zimachepetsa HCl yomwe imapanga kupititsa patsogolo moyo wa polima.Zomwe ziyenera kuganiziridwa posankha chowongolera kutentha ndi: zofunikira zaukadaulo; Kuvomerezeka kwadongosolo; mtengo.

3.Fillers amawonjezeredwa muzitsulo za PVC pazifukwa zosiyanasiyana.Masiku ano, chodzaza chikhoza kukhala chowonjezera pakuchita bwino popereka mtengo m'njira zatsopano komanso zosangalatsa pamtengo wotsika kwambiri wopangira.Amathandizira: kukulitsa kuuma ndi mphamvu, kupititsa patsogolo magwiridwe antchito, kuwonjezera mtundu, mawonekedwe, mawonekedwe, ndi zina zambiri.

Calcium carbonate, titanium dioxide, dongo losungunuka, galasi, talc etc. ndi mitundu yodziwika bwino ya zodzaza zomwe zimagwiritsidwa ntchito mu PVC.

Mafuta a 4.Akunja amagwiritsidwa ntchito kuthandizira njira yosalala ya PVC kusungunula pogwiritsa ntchito zida zopangira.pamene mafuta amkati amachepetsa kusungunuka kwa viscosity, kuteteza kutenthedwa ndi kuonetsetsa mtundu wabwino wa mankhwala.

5.Zowonjezera zina monga zothandizira pokonza, zosintha zowonongeka, zimawonjezedwa kuti zipititse patsogolo makina komanso pamwamba pa PVC.