Igumbi lokucoca ipleyiti yePP kunye nesakhelo sokucoca icwecwe liqukethe iipleyiti zokucoca zePP kunye nezakhelo zokucoca zePP ezicwangciswe ngokulandelelana, zamkela imo yekona ephezulu yokutya.Ipleyiti kunye nesakhelo sokucofa isihluzo sinokukhutshwa kuphela ngokutsala ipleyiti ngesandla.Ipleyiti yePP kunye noxinzelelo lwesakhelo sokucoca zisetyenziselwa izinto ezine-viscosity ephezulu, kwaye ilaphu lokucoca lihlala licocwa okanye litshintshwe.Ipleyiti yePP kunye nesakhelo sokucoca ifreyim ingasetyenziswa kunye nephepha lokucoca ukuchaneka okuphezulu kokucoca.