Injoloba inokunwebeka okuhle, kodwa le mpahla eyigugu idala ubunzima obukhulu ekukhiqizeni umkhiqizo. Uma ukunwebeka kwenjoloba eluhlaza kungancishiswanga kuqala, amandla amaningi emishini asetshenziswa ku-deformation elastic ngesikhathi senqubo yokucubungula, futhi isimo esidingekayo asikwazi ukutholwa. Ubuchwepheshe bokucubungula irabha bunezidingo ezithile zepulasitiki yenjoloba eluhlaza, njengokuxuba, ngokuvamile okudinga i-Mooney viscosity engaba ngu-60, kanye nokusula irabha, okudinga i-Mooney viscosity engaba ngu-40, Uma kungenjalo, ngeke kwenzeke ukusebenza kahle. . Amanye ama-adhesive aluhlaza aqinile kakhulu, ane-viscosity ephezulu, futhi ayinazo izakhiwo eziyisisekelo nezidingekayo zenqubo - ipulasitiki enhle. Ukuze uhlangabezane nezidingo zenqubo, irabha eluhlaza kufanele ifakwe epulasitiki ukuze inqume uchungechunge lwamangqamuzana futhi inciphise isisindo samangqamuzana ngaphansi kwezenzo zemishini, ezishisayo, zamakhemikhali nezinye. Inhlanganisela yepulasitiki elahlekelwa ukunwebeka kwayo okwesikhashana bese ithambile futhi ithambile. Kungashiwo ukuthi ukubunjwa kwenjoloba eluhlaza kuyisisekelo sezinye izinqubo zobuchwepheshe.
Inhloso yokubunjwa kwenjoloba eluhlaza iwukuba: okokuqala, ukuthola izinga elithile lepulasitiki lenjoloba eluhlaza, okulenze lifanelekele ukuxuba, ukugoqa, ukukhishwa, ukwakheka, ukuvuvukalisa, kanye nezidingo zezinqubo ezifana nerabha yenjoloba kanye nerabha yesipontshi. ukukhiqiza; Okwesibili ukwenza i-homogenize ipulasitiki yenjoloba eluhlaza ukuze kukhiqizwe impahla yenjoloba enekhwalithi efanayo.
Ngemuva kokufakwa kwepulasitiki, izakhiwo ezingokomzimba nezamakhemikhali zenjoloba eluhlaza nazo ziyashintsha. Ngenxa yamandla aqinile emishini kanye ne-oxidation, ukwakheka kwamangqamuzana nesisindo samangqamuzana enjoloba kuzoshintsha ngokwezinga elithile, ngakho izakhiwo ezingokomzimba nezamakhemikhali nazo zizoshintsha. Lokhu kubonakaliswa ukuncipha kokunwebeka, ukwanda kwepulasitiki, ukwanda kokuncibilika, ukwehla kwe-viscosity yesisombululo senjoloba, kanye nokuthuthukiswa kokusebenza kokunamathela kwento yenjoloba. Kodwa njengoba ipulasitiki yenjoloba eluhlaza ikhula, amandla emishini enjoloba ancipha, ukuwohloka okuhlala njalo kuyanda, futhi ukumelana nokugqoka nokumelana nokuguga kokubili kuncipha. Ngakho-ke, i-plasticization yerabha eluhlaza inenzuzo kuphela kwinqubo yokucubungula irabha, futhi ayihambisani nokusebenza kwenjoloba ene-vulcanized.
Isikhathi sokuthumela: Jul-26-2023
