Ampacet Corp. has introduced PET masterbatches that can be used without predrying and that have the potential to reduce problems such as feed-throat clogging and screw slippage.
Formula X masterbatches are suited to stretch blow molding, injection molding and thermoforming. The Tarrytown, N.Y., firm said they provide good dispersion of colors, additives and even special-effect pigments such as pearlescents and frost effects that normally are hard to get in PET.
Unlike liquid colors or wax-based colors, Formula X materials are compatible with bottle-grade PET and their viscosity is similar to PET, leaving bottle properties unchanged.
The masterbatches can be fed directly into the throat of a machine and they don't require several hours of drying typical for PET resins.
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