Kutheni le nto irabha ifuna ukutshatyalaliswa?Ziziphi iingenelo zerabha evuzayo?
Nangona irabha yerabha ekrwada nayo ineempawu eziluncedo kwisicelo, ikwanezinto ezininzi ezitsalayo, njengamandla asezantsi kunye nokunwebeka okuphantsi;Ingqele iyenza iqine, ishushu iyenze incangathi;Ukuguga kulula, njl. Kwangeminyaka yoo-1840, kwafunyaniswa ukuba irabha inokudibana ngokuyifudumeza kunye nesalfure.Ke ngoko, kude kube ngoku, nangona irabha inokudityaniswa kungekuphela nje ngesulfure, kodwa kunye nezinye iikhemikhali ezininzi ezinqamlezayo kunye neendlela zomzimba kunye neekhemikhali, kwishishini lerabha, bekusoloko kuqhelekile ukubhekisa kwi-rubber crosslinking njenge "vulcanization", ngelixa. ishishini lokwenziwa kweplastiki ngamanye amaxesha libhekisa kwi-crosslinking reaction njengokunyanga.I-Vulcanization iphucula kakhulu ukusebenza kwerabha ekrwada, yandisa uluhlu lwerabha yokusetyenziswa, kwaye ibeka isiseko sokuveliswa kwemveliso enkulu kunye nokusetyenziswa kwerabha.
Irabha vulcanization yenye yeenkqubo eziphambili ekusetyenzweni kwemveliso yerabha, kwaye ikwalinyathelo lokugqibela lokwenziwa kwemveliso yerabha.Kule nkqubo, i-rubber ithatha uchungechunge lweenguqu eziyinkimbinkimbi zeekhemikhali, ukusuka kumxube weplastiki ukuya kwi-rubber edibeneyo okanye i-rubber edibeneyo edibeneyo, ukwenzela ukuba kufumaneke izinto ezigcweleyo zomzimba, zoomatshini kunye neekhemikhali, kunye nokuphucula nokwandisa ixabiso lokusetyenziswa kunye nesicelo. uluhlu lwezixhobo zerabha.Ke ngoko, i-vulcanization ibaluleke kakhulu ekwenzeni kunye nokusetyenziswa kwerabha kunye neemveliso zayo.
Ingqikelelo ye-vulcanization
I-Vulcanization ibhekiselele kwimveliso egqityiweyo eyenziwe kwizixhobo zerabha kunye neplastiki ethile kunye ne-viscosity (irabha eluhlaza, ikhompawundi yeplastiki, irabha exutyiweyo) ngokulungiswa okufanelekileyo (okufana nokuqengqeleka, ukukhutshwa, ukubumba, njl. njl.) phantsi kweemeko ezithile zangaphandle, ngokusebenzisa imichiza izinto (ezifana nenkqubo ye-vulcanization) okanye izinto eziphathekayo (ezifana no-γ Inkqubo yokuguqula impembelelo yemitha ibuyele kwiimveliso zerabha ezithambileyo ezithambileyo okanye iimveliso zerabha enzima ukufumana ukusebenza ngokusetyenziswa. Ngexesha lenkqubo yokuvuthuza, iimeko zangaphandle (ezifana nokufudumeza okanye radiation) ibangela ukusabela kweekhemikhali phakathi kwerabha ekrwada kumacandelo erubha ekrwada kunye ne-arhente etshabalalisayo okanye phakathi kwerabha ekrwada kunye nerabha ekrwada, okukhokelela ekudibaneni okunqamlezileyo kweemacromolecules zerabha ezinomgama zibe ziimacromolecules ezinemilinganiselo emithathu yothungelwano eyakhiweyo.
Ngale ndlela yokusabela, iipropathi ezahlukeneyo zerabha ziye zaphuculwa kakhulu, nto leyo eyenza ukuba iimveliso zerabha zifumaneke ngokwasemzimbeni, ngoomatshini, kunye nezinye iimpawu ezinokuhlangabezana neemfuno zokusetyenziswa kwemveliso.Undoqo we-vulcanization yi-cross-linking, eyinkqubo yokuguqula izakhiwo zemolekyuli zerabha ezinomgca kwizakhiwo zenethiwekhi yendawo.
Inkqubo yesulfurization
Emva kokulinganisa ubungakanani berabha edibeneyo kunye ne-agent agent, inyathelo elilandelayo kukongeza i-agent vulcanizing.Kucetyiswa ukuba ulandele la manyathelo alandelayo ukugqiba.
1. Okokuqala, coca ilitye lokusila ukuqinisekisa ukucoceka kwalo ukuthintela ukuxubana kobunye ukungcola.Emva koko ulungelelanise i-pitch ye-roller ye-mill yokuvula ubuncinci kwaye uthele i-rubber edibeneyo kwi-mill yokuvula ukudlula okuncinci.Emva kokuba kugqitywe ukupasa okuncinci, i-roll spacing yomxube kufuneka yandiswe ngokufanelekileyo ukuqinisekisa ukuba i-rubber edibeneyo ihlanganiswe ngokulinganayo kwimiqulu.Ubushushu bomphezulu werabha exutyiweyo kufuneka bube malunga ne-80oC.
2. Ngokulungelelanisa i-roller pitch kunye nokupholisa ngokufanelekileyo amanzi, ukushisa kwerabha edibeneyo kulawulwa malunga ne-60-80 ° C. Ngeli xesha, i-agent e-vulcanizing iqalwa ukuba yongezwe kwi-rubber edibeneyo.
Ixesha lokuposa: Oct-25-2023
