Method for controlling melt rheology of resin mixtures
AssigneeXerox Corporation
InventorsHui Chang, Dongming Li, Joseph L. Leonardo, Yelena Lipovetskaya, Laura A. Williams
Life of this patent
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Abstract
A process including: introducing and continuously melt mixing in an extruder a mixture of a first resin feed and a second resin feed; measuring within the extruder the melt rheology of the resulting melt mixture of the first and second resins; determining the relative ratio of the first resin and a second resin from the melt rheology in the resulting melt mixture; and adjusting the relative feed ratio of the first resin and second resin feeds introduced to the extruder.
Claims21
A process for preparing a toner resin comprising:
- introducing and melt mixing in an extruder a mixture of a first resin feed and a second resin feed;
- measuring within the extruder the melt rheology of the resulting melt mixture of the first and second resins;
- determining the relative ratio of the first resin and a second resin from the melt rheology in the resulting melt mixture;
- and
- adjusting the relative feed ratio of the first resin and second resin feeds introduced to the extruder as measured by the melt rheology.
A process for preparing a toner resin comprising:
- continuously melt mixing a mixture of two or more feed resins in an extruder;
- continuously measuring the melt rheology in viscosity or elasticity of the resulting resin melt mixture within the extruder;
- continuously computing the relative ratio of the resulting resin mixture from the measured melt rheology;
- and
- altering the relative ratio of the feed resins introduced to the extruder when the relative ratio of the resins in the resulting melt mixture, as measured by the melt viscosity or elasticity of the mixture near the extruder exit port, deviates from a predetermined melt viscosity of 2,400 poise at 40 radians per second per 156° C. by more than about 40 to about 45 units as measured by a Goettfeit viscometer, or a melt elasticity of 5,450 poise per sec−1 per 135° C. by more than about 75 to about 80 units as measured by a slit-die type rheometer.
Dependencies are inferred from the claim text.