Iyo nzira yekurapa ye polyurethane foam ine matanho akati wandei: kuwedzera kwekutanga, kuomeswa kwepamusoro, kurapa kwemukati, uye kuomesa zvachose.
Kutanga, kuwedzera kunotanga mukati me5-15 seconds yekupfapfaidza, nekukurumidza kuwedzera muhuwandu kusvika pakukwirira kwayo. Iyi nhanho inokanganiswa zvakanyanya nehunyoro hwepakati; humidity yakakwirira inoguma nekuita nekukurumidza.
Inotevera idanho rekuomeswa kwepamusoro, rinowanzogara anenge maminetsi gumi (pakamuri tembiricha ye20℃uye hunyoro hwe50%). Panguva ino, firimu rakatetepa rinoumba pamusoro pefuro, zvichiita kuti rirege kunamatira, asi mukati unoramba wakapfava. Iyi ndiyo nguva yakakwana yekugadzirisa chimiro.
Iyo yemukati yekurapa nhanho inoda nguva yakareba. Muzhizha (kupisa 25-30 dhigirii), kurapa kwakakwana kunotora maawa anenge 4-6; munguva yechando (tembiricha 0-10 dhigirii), inogona kuwedzera kusvika kumaawa makumi maviri nemana kana kupfuura. Iyo nguva yegel, kubva pakupfapfaidza kusvika pakurasikirwa kwemvura, kazhinji 5-10 maminetsi, inokonzerwa necatalyst uye tembiricha.
Zvinhu zvinokanganisa nguva yekurapa zvinosanganisira tembiricha, humidity, uye furo gobvu. Kune yega yega 10 madhigirii ekuwedzera tembiricha, iyo reaction rate inopetwa kaviri. Low humidity kunonoka kurapwa; saka, kumwaya mvura kunogona kubatsira munzvimbo dzakaoma. Kana iyo colloid ukobvu inodarika 5cm, yemukati kupisa kuvaka kunogona kukurumidza kurapa asiwo kuwedzera njodzi yevoids.
Munzvimbo dzakanyorova dzekumaodzanyemba, nguva yekurapa ipfupi, ichifambisa kushandiswa. Munzvimbo dzakaoma, dzinotonhora dzekuchamhembe, matanho ekudzivirira anodiwa. Mumashandisirwo anoshanda, zvinokurudzirwa kumirira maawa makumi maviri nemana pamberi peanotevera maoparesheni, akadai sekucheka kana kupenda, kuve nechokwadi chesimba.
Pasi pemamiriro ezvinhu akakosha, akadai sekushandisa pasi pemvura, nguva yekurapa inogona kupfupikiswa nekuti mvura inobata zvakananga mukuita. Nekudaro, zvinofanirwa kucherechedzwa kuti kurapa kwakanyanya nekukurumidza kunogona kukanganisa kufanana.
Kunzwisisa maitiro aya kunogona kubatsira vashandisi kukwirisa application uye kudzivirira zvikanganiso zvekushandisa.