Arnite can be easily processed. Arnite has good flow, and high crystallinity
ensuring rapid cooling times.
Typical processing temperatures for Arnite T (PBT) are 235°C - 275°C whereas
for Arnite A (PET), a processing temperature range between 265°C – 295°C is
advisable.
Molds may need heating to ensure high crystallinity and better surface finish
(80°C – 135°C for Arnite A (PET), and 30°C – 100° for Arnite T(PBT)).
Even a low amount of moisture absorbed by the granules can result in moldings
with no strength due to break-down of the polymer chain itself. Care must be
taken to pre-dry granules that could have been exposed to the atmosphere prior
to molding to remove all moisture present. To spare you the expense and time
required carrying out pre-drying operations, Arnite comes in sealed bags and
is ready to be molded without pre-drying. However, if the bag has been opened
and is exposed to moisture it is essential to pre-dry the material.
