Njengemathiriyeli ekrwada yamatayara, irabha ibhekisa kwimathiriyeli enwebekayo yepolymer enokuguqulwa umva. I-elastic kubushushu begumbi, inokuvelisa i-deformations enkulu phantsi kwesenzo samandla amancinci angaphandle, kwaye inokubuyela kwimo yayo yangaphambili emva kokususwa kwamandla angaphandle. Irabha yipolymer e-amorphous ngokupheleleyo. Ubushushu bayo beglasi buphantsi kwaye ubunzima bayo bemolekyuli buhlala buba bukhulu, bungaphezulu kwamakhulu amawaka.
Irabha yohlulwe ibe ziindidi ezimbini: irabha yendalo kunye nerabha yokwenziwa. Irabha yendalo yenziwa ngokukhupha itshungama kwimithi yerabha, ingca yerabha kunye nezinye izityalo; irabha eyenziweyo ifunyenwe ngepolymerization yeemonomers ezahlukeneyo.
Sonke siyazi ukuba ukubumba irabha kuneemfuno eziphezulu zokushisa. Ngokubanzi, ukuze kuqinisekiswe isiphumo esihle sokubunjwa kwerabha, iifektri zerabha zihlala zisebenzisa iijenereyitha zobushushu obuphezulu zokufudumeza kunye nokubumba irabha.
Ekubeni irabha iyi-elastomer enyibilikayo enyibilikayo, iplastiki yi-elastomer yokunyibilika eshushu kunye nokuseta ukubanda. Ngoko ke, iimeko zokuvelisa iimveliso zerabha zifuna ukulungiswa okufanelekileyo kweqondo lokushisa kunye nomswakama nangaliphi na ixesha, ngaphandle koko ukungafani komgangatho wemveliso kunokwenzeka. Ijenereyitha yomphunga idlala indima ebalulekileyo koku.
Nabani na oye wadibana ne-rubber uyazi ukuba i-rubber ngokwayo idinga ukuxhaswa kweqondo lokushisa eliphezulu ukumila, kwaye xa wenza iimveliso zerabha, kuyafuneka ukuba kusetyenziswe iiplastiki ezishushu ezincibilikayo kunye nezibandayo, ezifuna ukulungiswa kweqondo lokushisa ngexesha lokuvelisa. Ijenereyitha yomphunga inokudlala indima kule nkqubo. Le mveliso elungiselelwe ngumenzi inokufikelela kulawulo olukrelekrele kwaye inokulungelelanisa ubushushu kunye nokufuma ngokwezinto ezahlukeneyo, ngaloo ndlela yenza umgangatho wemveliso wemveliso yerabha ube phezulu.
Ijenereyitha yomphunga yeNobeth inokuqhubeka nokukhupha umphunga wobushushu obuphezulu obunobushushu obungange 171°C, obufaneleke ngokupheleleyo ukuveliswa kweemveliso zerabha.