Izindlela Zokuthuthukisa Izakhiwo ze-PVC - Iqhaza Lezengezo.

I-PVC resin etholwe ku-polymerization ayizinzile ngokwedlulele ngenxa yokungaguquguquki kwayo okushisayo kanye ne-viscosity ephezulu yokuncibilika. Idinga ukushintshwa ngaphambi kokucutshungulwa ibe yimikhiqizo eqediwe. Izakhiwo zayo zingathuthukiswa/zilungiswe ngokungeza izithasiselo ezimbalwa, njengeziqinisi ukushisa, iziqinisi ze-UV, ama-plasticizers, ama- impact modifiers, ama-filler, ama-flame retardants, ama-pigments, njll.

Ukukhethwa kwalezi zithako zokuthuthukisa izakhiwo ze-polymer kuncike esimisweni sohlelo lokusebenza. Ngokwesibonelo:

1.Ama-Plasticizers (i-Phthalates, i-Adipates, i-Trimellitate, njll.) asetshenziswa njengama-ejenti athambisayo ukuze kuthuthukiswe ukusebenza kwe-rheological kanye nomshini (ukuqina, amandla) kwemikhiqizo ye-vinyl ngokukhuphula izinga lokushisa. Izinto ezithinta ukukhethwa kwama-plasticizers e-vinyl polymer yilezi:Ukuhambisana kwe-Polymer; Ukuguquguquka okuphansi; izindleko.

I-2.PVC inokuqina okushisayo okuphansi kakhulu futhi izinzile zisiza ukuvimbela ukuwohloka kwe-polymer ngesikhathi sokucubungula noma ukuchayeka ekukhanyeni. Uma ingaphansi kokushisa, izakhi ze-vinyl ziqala ukusabela kwe-dehydrochlorination ezisheshayo futhi lezi zinzisi zinciphisa i-HCl ekhiqizwa ithuthukisa impilo ye-polymer. Izinto okufanele zicatshangelwe lapho kukhethwa isiqinisi sokushisa yilezi: izidingo zobuchwepheshe;Ukuvunyelwa kokulawula; izindleko.

I-3.Fillers yengezwa kuma-PVC compounds ngezizathu ezihlukahlukene. Namuhla, isigcwalisi singaba isengezo sokusebenza sangempela ngokuletha inani ngezindlela ezintsha nezithandekayo ngezindleko eziphansi kakhulu zokuqamba. Zisiza: ukukhulisa ukuqina namandla, ukwenza ngcono ukusebenza komthelela, ukwengeza umbala, ukungaboni kahle kanye nokuhamba nokunye.

I-calcium carbonate, i-titanium dioxide, ubumba olubaliwe, ingilazi, i-talc njll. yizinhlobo ezivamile zokugcwalisa ezisetshenziswa ku-PVC.

4.Amafutha okugcoba angaphandle asetshenziselwa ukusiza ukudlula okushelelayo kwe-PVC kuncibilike ngokusebenzisa imishini yokucubungula. kuyilapho amafutha angaphakathi anciphisa i-viscosity encibilikayo, avimbele ukushisa futhi aqinisekise umbala omuhle womkhiqizo.

5.Ezinye izithasiselo ezifana nezinsiza zokucubungula, iziguquli zomthelela, zengezwa ukuze kuthuthukiswe izakhiwo zomshini kanye nezingaphezulu ze-PVC.