General: For best results, laboratory tests or pre-production trials should determine the optimum addition level. MOLD WIZ Process Aid Additives are effective within a range of 1 to 10 parts per 1000 resin or rubber by weight, excluding reinforcements, pigments and fillers. A high amount of filler may require a higher percentage of process aid additive than the indicated maximum. Always start an evaluation at 5 parts per 1000 (0.5%). In thermosets, too much process aid additive may retard the cure. Reduce the level of additive or slightly increase the catalyst. In thermoplastics, the process aid additive may increase the MFI. Reduce the level of additive, or reduce the process temperature to raise the resin viscosity and to eliminate screw slippage.
Mixing: For two-part thermoset resins, mix the process aid additive in the less viscous or less reactive side before catalyzing. For thermoplastics, dry blend the process aid additive by tumbling, or use an additive dispenser to meter directly into the resin stream. Process aid additives may be compounded into the resin to make a masterbatch. |
