Zbog visoke viskoznosti taljenja CPVC, posebno kod injekcijskog prešanja, sklon je lomovima taljenja, pa nije prikladno koristiti samo tradicionalne sustave za podmazivanje parafinskog voska, stearinske kiseline i metalnog sapuna. U ekstruzijskoj obradi CPVC-a, budući da CPVC ima tendenciju prianjanja na metalnu površinu opreme za -vruću obradu (osobito matrice i kalupa), kako bi se uklonilo ovo prianjanje, mora se dodati vanjsko mazivo na formulaciju. Vanjska maziva i CPVC smole ne smiju se miješati.
In the CPVC molding process (especially the injection process), under the action of pressure, the mutual friction between the CPVC resins generates frictional heat. The generation of frictional heat is unfavorable to the molding process and must be controlled. Internal lubricants reduce the friction between resins during CPVC processing. The internal lubricant and CPVC resin should be compatible. It should be noted that the balance of internal and external lubrication in the formulation is key. Excessive internal lubrication will seriously affect "plasticization" and deteriorate the quality of products; excessive external lubrication will cause lubricant precipitation, and even lead to screw slippage and other phenomena that seriously affect normal production. The OP wax (montan ester wax) in the saponified wax is an ideal internal and external compound lubricant.
