We have recently had intermittent problems of the molded parts turning from 100% clear to milky randomly during production. After investigating the dried raw material, we have found random milky pellets in the same shape and size as the clear ones. Investigation in to the original Gaylord of this batch has found no such pellets.

There has been limited areas where this material could have been contaminated on our shop floor and we are not sure how this is happening. Coincidently, at the same time as this problem we are suspecting there may be some temperature control issues with our desiccant dryer.

Does Tritan become milky when overheated in a dryer?


알렉스 님

Tritan does require drying in a desiccant dryer. Tritan should be dried at 190°F (88°C) for 4 to 6 hours. A moisture level below 500ppm or 0.05% is recommended. The dyer air should be kept at a dew point of -20°F (-30°C) with a flow rate 1 cubic foot per minute per pound of material.
Tritan is an amorphous polymer and should not turn cloudy. By sending the cloudy pellets for analysis, our technical team would be happy to help you determine what has happened.