Ukugqwala ngepulasitiki kungahlukaniswa ngezinqubo ezintathu: ukwakheka kwama-nuclei e-bubble, ukwandiswa kwama-nuclei e-bubble, kanye nokuqina kwemizimba ye-foam. Kumashidi e-foam e-PVC, ukwandiswa kwe-bubble core kunomthelela omkhulu kwikhwalithi yeshidi le-foam. I-PVC ingeye-molecule yeketanga eliqondile, enamaketanga amafushane e-molecule kanye namandla aphansi okuncibilika. Ngesikhathi senqubo yokwandiswa kwama-bubble abe ama-bubble, ukuncibilika akwanele ukumboza ama-bubble, futhi igesi ivame ukugcwala futhi ihlangane nama-bubble amakhulu, okunciphisa ikhwalithi yomkhiqizo wamashidi e-foam.
Isici esiyinhloko ekuthuthukiseni ikhwalithi yamashidi e-foam e-PVC ukwandisa amandla okuncibilika kwe-PVC. Kusukela ekuhlaziyweni kwezimpawu zokucubungula zezinto ze-polymer, kunezindlela ezahlukahlukene zokuthuthukisa amandla okuncibilika kwe-PVC, phakathi kwazo indlela ephumelela kakhulu ukwengeza izithasiselo ukuthuthukisa amandla okuncibilika nokunciphisa izinga lokushisa lokucubungula. I-PVC ingezinto ezi-amorphous, futhi amandla okuncibilika ayancipha ngokwanda kwezinga lokushisa lokuncibilika. Ngokuphambene nalokho, amandla okuncibilika ayanda ngokuncipha kwezinga lokushisa lokuncibilika, kodwa umphumela wokupholisa ulinganiselwe futhi udlala indima yokusiza kuphela. Ama-ejenti okucubungula i-ACR anomphumela wokuthuthukisa amandla okuncibilika, phakathi kwawo abalawuli be-foam abaphumelela kakhulu. Amandla okuncibilika ayanda ngokwanda kokuqukethwe komlawuli we-foam. Ngokuvamile, inqobo nje uma isikulufu sinokuhlakazeka okwanele nekhono lokuxuba, ukwengeza abalawuli be-foam abane-viscosity ephezulu kunomphumela obaluleke kakhulu ekuthuthukiseni amandla okuncibilika. Indima yokusiza ekucubunguleni kumashidi e-foam e-PVC: Izinsiza zokucubungula i-ACR zikhuthaza ukuncibilika kwe-PVC, zithuthukise ubushele bendawo, zithuthukise ukuqina kokuncibilika, futhi zithuthukise ukunwebeka nokuqina kokuncibilika. Kuwusizo ekugoqeni amabhamuza nokuvimbela ukuwa kwamabhamuza. Isisindo sama-molecule kanye nomthamo wezilawuli ze-foam kunomthelela omkhulu ekuminyaneni kwamashidi e-foam: njengoba isisindo sama-molecule sikhula, amandla okuncibilika kwe-PVC ayanda, futhi ubuningi bamashidi e-foam bungancishiswa, okunomphumela ofanayo nokwandisa umthamo wabalawuli. Kodwa lo mphumela awunabo ubudlelwano obuqondile. Ukuqhubeka nokwandisa isisindo sama-molecule noma umthamo akunawo umthelela obalulekile ekunciphiseni ubuningi, futhi ubuningi buzohlala bunjalo.
Kukhona ubudlelwano obubalulekile phakathi kwezilawuli ze-foam kanye nama-foam agent. Kukhona iphuzu lokulingana phakathi kobuningi bamashidi e-foam kanye nezilawuli ze-foam. Ngale kwaleli phuzu lokulingana, ubuningi bamashidi e-foam abuthinteki ngokuqukethwe kwama-foam agent futhi buhlala bunjalo. Okusho ukuthi, ukwandisa inani le-foam agent akukwazi ukunciphisa ubuningi. Isizathu salesi simo ukuthi ngaphansi kwenani elithile lezilawuli ze-foam, amandla okuncibilika kwe-PVC anqunyelwe, futhi igesi eningi ingabangela ukuwa noma ukuhlangana kwamaseli e-foam.
Isikhathi sokuthunyelwe: Mashi-28-2024
