6. Safety Precautions
As long as general safety precautions in the molding industry are observed, there is no special danger in molding DURANEX® PBT. However, appropriate ventilation is recommended because there are cases where DURANEX may decompose, and the decomposed product may accumulate when heated up to extremely high temperatures, as is the case with other plastics, which may be hazardous to health.
In order to prevent thermal decomposition and to prevent gas generation and pressure generation in the cylinder, resin temperature should not be raised to 280°C or higher.
Also, if long-time stoppage is required, all the resin in the cylinder should be discharged, and the temperature should be lowered to 230°C or less.
Before pellets are supplied or the screw is rotated, sufficient time should be taken for the cylinder to heat up to at least 250°C.
Workers should wear protective glasses, especially when purging. Also, they should wear gloves when handling hot molds, etc. While molding is stopped, the injection unit should be retracted to prevent the nozzle section from hardening due to contact with the mold.