Njira Zowonjezerera Makhalidwe a PVC - Udindo wa Zowonjezera.

Utomoni wa PVC womwe umapezeka kuchokera ku polymerization ndi wosakhazikika kwambiri chifukwa cha kukhazikika kwake pang'ono kwa kutentha komanso kukhuthala kwakukulu kwa kusungunuka. Umafunika kusinthidwa usanakonzedwe kukhala zinthu zomalizidwa. Makhalidwe ake amatha kukulitsidwa/kusinthidwa powonjezera zowonjezera zingapo, monga zokhazikika kutentha, zokhazikika za UV, zomangira pulasitiki, zosinthira mphamvu, zodzaza, zoletsa moto, utoto, ndi zina zotero.

Kusankha zowonjezera izi kuti ziwonjezere mawonekedwe a polima kumadalira kufunika kogwiritsa ntchito kumapeto. Mwachitsanzo:

1. Mapulasitiki (Phthalates, Adipates, Trimellitate, ndi zina zotero) amagwiritsidwa ntchito ngati zinthu zofewetsa kuti ziwonjezere magwiridwe antchito a rheological komanso makina (kulimba, mphamvu) a zinthu za vinyl powonjezera kutentha. Zinthu zomwe zimakhudza kusankha mapulasitiki a vinyl polymer ndi izi: Kugwirizana kwa polymer ； Kusasinthasintha kochepa ； mtengo wake.

2. PVC ili ndi kutentha kochepa kwambiri ndipo zokhazikika zimathandiza kupewa kuwonongeka kwa polima panthawi yokonza kapena kuwonetsedwa ku kuwala. Zikatenthedwa, ma vinyl compounds amayambitsa kudzipangitsa kuti achepetse mphamvu ya dehydrochlorination ndipo zokhazikikazi zimapangitsa kuti HCl yomwe imapangidwira ikhale ndi moyo wabwino wa polima. Zinthu zofunika kuziganizira posankha chokhazikika kutentha ndi izi: zofunikira zaukadaulo ； Kuvomerezeka kovomerezeka ； mtengo.

3. Zodzaza zimawonjezedwa mu mankhwala a PVC pazifukwa zosiyanasiyana. Masiku ano, chodzaza chingakhale chowonjezera chenicheni popereka phindu m'njira zatsopano komanso zosangalatsa pamtengo wotsika kwambiri. Zimathandiza: kuwonjezera kuuma ndi mphamvu, kukonza magwiridwe antchito, kuwonjezera mtundu, kuonekera bwino ndi kuyendetsa bwino zinthu ndi zina zambiri.

Calcium carbonate, titanium dioxide, dongo lokhala ndi calcium, galasi, talc ndi zina zotero ndi mitundu yodziwika bwino ya zodzaza zomwe zimagwiritsidwa ntchito mu PVC.

4. Mafuta odzola akunja amagwiritsidwa ntchito kuthandiza kudutsa bwino kwa PVC kusungunuka kudzera mu zipangizo zokonzera. Pamene mafuta odzola amkati amachepetsa kukhuthala kwa kusungunuka, kupewa kutentha kwambiri ndikuwonetsetsa kuti chinthucho chili ndi mtundu wabwino.

5. Zowonjezera zina monga zothandizira kukonza, zosinthira mphamvu, zimawonjezedwa kuti ziwonjezere mawonekedwe a makina komanso pamwamba pa PVC.