Inkqubo yokunyanga i-polyurethane foam inezigaba ezininzi: ukwanda kokuqala, ukomiswa komphezulu, ukunyanga kwangaphakathi, kunye nokuqina okupheleleyo.
Okokuqala, ukwandiswa kuqala kwimizuzwana emi-5-15 yokutshiza, ngokukhawuleza ukwandisa umthamo ukuya kubuninzi bayo. Eli nqanaba lichaphazeleka kakhulu kukufuma kwe-ambient; ukufuma okuphezulu kubangela ukusabela ngokukhawuleza.
Okulandelayo linqanaba lokumisa umphezulu, elihlala lihlala malunga nemizuzu eyi-10 (kwigumbi lobushushu le-20℃kunye nokufuma okunxulumene ne-50%). Ngeli xesha, ifilimu encinci ifom ebusweni be-foam, eyenza ukuba ingabi yinto enamathele, kodwa ingaphakathi lihlala lithambile. Eli lelona xesha lilungileyo lokulungelelanisa imilo.
Inqanaba lokunyanga kwangaphakathi lifuna ixesha elide. Ehlotyeni (ubushushu obungama-25-30 degrees), ukunyanga ngokupheleleyo kuthatha malunga neeyure ezingama-4-6; ebusika (iqondo lobushushu 0-10 idigri), inokwandisa kwiiyure ezingama-24 okanye ngaphezulu. Ixesha lejeli, ukusuka ekutshizeni ukuya ekulahlekeni kwamanzi, ngokuqhelekileyo yimizuzu emi-5-10, echatshazelwa yi-catalyst kunye nobushushu.
Izinto ezichaphazela ixesha lokunyanga ziquka ubushushu, ukufuma, kunye nobukhulu begwebu. Kwiqondo ngalinye le-10 lokunyuka kweqondo lobushushu, izinga lokuphendula liphinda kabini. Ukufuma okuphantsi kulibazisa ukunyanga; ngoko ke, ukutshiza ngamanzi kunokuncedisa kwiindawo ezomileyo. Xa ubukhulu be-colloid bungaphezulu kwe-5cm, ubushushu bangaphakathi bunokukhawulezisa ukunyanga kodwa kwandisa umngcipheko we-voids.
Kwimimandla esemazantsi efumileyo, ixesha lokunyanga lifutshane, liququzelela ukusetyenziswa. Kwimimandla eyomileyo, ebandayo esemantla, amanyathelo okukhusela ayimfuneko. Kwizicelo ezisebenzayo, kucetyiswa ukuba ulinde iiyure ezingama-24 ngaphambi kokusebenza okulandelayo, njengokusika okanye ukupeyinta, ukuqinisekisa amandla.
Ngaphantsi kweemeko ezikhethekileyo, ezifana nezicelo zangaphantsi kwamanzi, ixesha lokunyanga lingancitshiswa kuba amanzi athatha inxaxheba ngokuthe ngqo ekuphenduleni. Nangona kunjalo, kufuneka kuqatshelwe ukuba ukunyangwa ngokukhawuleza okugqithisileyo kunokuchaphazela ukufana.
Ukuqonda ezi nkqubo kunokunceda abasebenzisi ukuba basebenzise usetyenziso kwaye baphephe iimpazamo zesicelo.