Sezvakagadzirwa zvematayi, rabha inoreva yakanyanyisa elastic polymer zvinhu zvine inodzoreredzwa deformation. Iyo elastic pane tembiricha yekamuri, inogona kuburitsa yakakura deformation pasi pekuita kwesimba diki rekunze, uye inogona kudzokera kuchimiro chayo chepakutanga mushure mekunge simba rekunze rabviswa. Rubber ndeye amorphous polymer zvachose. Tembiricha yaro yekuchinja kwegirazi yakadzikira uye huremu hwayo hwemamorekuru hunowanzokura, kupfuura mazana ezviuru.
Rubber yakakamurwa kuva mhando mbiri: natural rabha uye synthetic rubber. Rabha rechisikigo rinogadzirwa nekubvisa chingamu kubva mumiti yerabha, huswa hwerabha nemimwe miti; synthetic rubber inowanikwa ne polymerization yemamonomers akasiyana.
Isu tese tinoziva kuti kuumbwa kwerabha kune yakakwira tembiricha zvinodiwa. Kazhinji, kuitira kuti uve nechokwadi chekugadzirisa rabha, mafekitori erabha anowanzo shandisa majenareta ekupisa anopisa kupisa uye kuumba rabha.
Sezvo rabha iri inopisa-inonyunguduka thermosetting elastomer, plastiki ndiyo inopisa-inonyunguduka uye inotonhora-inomisa elastomer. Nokudaro, mamiriro ekugadzirwa kwezvigadzirwa zverabha zvinoda kugadziriswa kwakakodzera kwekushisa uye humidity chero nguva, zvikasadaro kusiyana kwehutano hwechigadzirwa kunogona kuitika. Iyo steam jenareta inoita basa rakakosha mune izvi.
Chero ani akambosangana nerubha anoziva kuti rabha pachayo inoda kutsigirwa kwekushisa kwepamusoro kuti iite, uye pakugadzira zvigadzirwa zverabha, zvinodiwawo kushandisa mapurasitiki anopisa uye anotonhora, izvo zvinoda kugadziriswa kwekushisa panguva yekugadzirwa. Iyo steam jenareta inogona kuita basa mukuita uku. Ichi chigadzirwa chakagadziridzwa nemugadziri chinogona kuwana hungwaru kutonga uye chinogona kugadzirisa tembiricha uye hunyoro zvinoenderana neakasiyana zvinhu, nekudaro zvichiita kuti kugadzirwa kwemhando yezvigadzirwa zverabha zvikwire.
Nobeth steam jenareta inokwanisa kuramba ichiburitsa tembiricha yakakwira ine tembiricha yehutsi inosvika 171°C, iyo inonyatsokodzera kugadzirwa kwezvigadzirwa zverabha.