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Method for continuously mixing polymer materials by means of a continuous mixing machine having a mixing chamber provided with at least one opening for supplying the polymer and at least one mouth for discharging the mixture and having arranged inside it a pair of rotors parallel with one another, t

Method for continuously mixing polymer materials by means of a continuous mixing machine having a mixing chamber provided with at least one opening for supplying the polymer and at least one mouth for discharging the mixture and having arranged inside it a pair of rotors parallel with one another, the method includes the stages of:

대표청구항 ▼

[ I claim:] [1.] A method for continuously mixing polymer materials by a continuous mixing extruder comprising the steps of:(a) supplying the polymer materials having a high viscosity through a supply mouth to a mixing chamber of the extruder;(b) simultaneously with step (a) supplying additives to b

[ I claim:] [1.] A method for continuously mixing polymer materials by a continuous mixing extruder comprising the steps of:(a) supplying the polymer materials having a high viscosity through a supply mouth to a mixing chamber of the extruder;(b) simultaneously with step (a) supplying additives to be mixed with the polymer materials in said mixing chamber through the supply mouth;(c) processing said polymer materials and additives by a pair of rotors formed with respective first and second threaded sections rotatable about parallel axes in said mixing chamber by:(c.sub.1) at least once preblending said additives and polymer materials at atmospheric pressure by first threaded axial sections of said rotors circumscribing respective envelopes which do not overlap each other, and(c.sub.2) thereafter mixing said premixed polymer materials and additives to form a homogenized mixture thereof by second threaded axial sections of said rotors intermeshing with each other; and(d) thereafter discharging the mixture through a discharge mouth formed axially downstream from the supply mouth.