I-resin ye-PVC etholakala ku-polymerization ayizinzile kakhulu ngenxa yokuqina kwayo okuphansi kokushisa kanye ne-viscosity ephezulu yokuncibilika. Idinga ukuguqulwa ngaphambi kokucutshungulwa ibe yimikhiqizo eqediwe. Izakhiwo zayo zingathuthukiswa/ziguqulwe ngokungeza izithasiselo eziningana, njengeziqinisi zokushisa, iziqinisi ze-UV, iziqinisi, izilungisi zomthelela, izigcwalisi, izithibi zomlilo, imibala, njll.
Ukukhethwa kwalezi zithasiselo zokuthuthukisa izakhiwo ze-polymer kuncike ezidingweni zokusetshenziswa kokugcina. Isibonelo:
1. Ama-Plasticizer (ama-Phthalate, ama-Adipate, ama-Trimellitate, njll.) asetshenziswa njengezinto zokuthambisa ukuze kuthuthukiswe ukusebenza kwe-rheological kanye nokusebenza komshini (ukuqina, amandla) kwemikhiqizo ye-vinyl ngokukhuphula izinga lokushisa. Izici ezithinta ukukhethwa kwama-plasticizer e-vinyl polymer yilezi: Ukuhambisana kwe-polymer ； Ukuguquguquka okuphansi ； izindleko.
2. I-PVC inokuqina okuphansi kakhulu kokushisa futhi iziqinisi zisiza ukuvimbela ukuwohloka kwe-polymer ngesikhathi sokucubungula noma ukuvezwa ekukhanyeni. Lapho ifakwa ekushiseni, ama-vinyl compounds aqala ukusabela kwe-dehydrochlorination okuzisheshisa futhi lezi ziqinisi ziqeda i-HCl ekhiqizwayo ethuthukisa impilo ye-polymer. Izinto okufanele zicatshangelwe ngenkathi kukhethwa isiqinisi sokushisa yilezi: izidingo zobuchwepheshe ； Ukuvunyelwa okusemthethweni ； izindleko.
3. Ama-filler ayengezwa kuma-compound e-PVC ngezizathu ezahlukahlukene. Namuhla, i-filler ingaba yisithasiselo sangempela sokusebenza ngokuletha inani ngezindlela ezintsha nezithakazelisayo ngezindleko eziphansi kakhulu zokwakheka. Zisiza eku: khulisa ukuqina namandla, thuthukisa ukusebenza komthelela, engeza umbala, ukungabonakali kanye nokuqhuba komoya nokuningi.
I-calcium carbonate, i-titanium dioxide, ubumba olune-calcium, ingilazi, i-talc njll. yizinhlobo ezivamile zezigcwalisi ezisetshenziswa ku-PVC.
4. Izithambisi zangaphandle zisetshenziselwa ukusiza ukudlula kahle kokuncibilika kwe-PVC emishinini yokucubungula. Kanti izithambisi zangaphakathi zinciphisa ukuthambisika kokuncibilika, zivimbele ukushisa ngokweqile futhi ziqinisekise umbala omuhle womkhiqizo.
5. Ezinye izithasiselo ezifana nezinsiza zokucubungula, iziguquli zomthelela, zengezwa ukuthuthukisa izakhiwo ze-PVC zemishini kanye nezomphezulu.
Isikhathi sokuthunyelwe: Disemba 13-2022