Mbali yofunika kwambiri ndi kusunga caster polyurethane mkulu elasticity mkati osiyanasiyana kuuma, ndi ena kwambiri mawotchi mphamvu, mafuta kukana ndi Mpweya umene kukana, chabwino otsika katundu kutentha.

Polyurethane caster yemweyo kukula katundu mphamvu 6 7 nthawi matayala mphira amene akhoza kukwaniritsa yothandizira kupanga ndondomeko ndi zochita zokha, chifukwa ulimi ndi ntchito zinyalala zochepa kwambiri, komanso Chofunika, ndi zinyalala tayala nyama gawo akhoza zobwezerezedwanso kwa mankhwala ena polyurethane, sadzachititsa kuwonongeka kwa malo ndi ndondomeko yake kupanga ndi losavuta-- madzi kuponyera akamaumba akuponya gudumu ndi mtundu watsopano palibe chingwe, amene amadziwika ngati m'ma 21 matayala wobiriwira, polyurethane mawilo adzakhala tsogolo chitukuko cha tayala zikuluzikulu, makampani tayala ali ndi chiyembekezo ntchito waukulu.