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Practical answers to common plastic material challenges

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Q

PC Transparent Part Optical Standards

A

Optical-grade PC is the highest standard of process control; parameter locking plus first-piece optical inspection eliminates fluctuations before mass production; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence

Material Drying PC;optical grade;light transmittance;haze;first-piece inspection

Q

PC Transparent Part Haze

A

For PC transparent part haze, check moisture, shear and degradation, with zero tolerance for the process; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence; include this case in the defect archive as a reference for troubleshooti...

Material Drying hazetransparentsheardegradation

Q

Distinguishing PC Bubbles and Vacuum Voids

A

Bubble defects must first be classified and characterized; water vapor, vacuum voids and degradation gas correspond to three completely different rectification routes of drying, holding pressure and temperature control; after confirming effectiveness, solidify the parameters and practices into th...

Material Drying PC;bubbles;vacuum voids;holding pressure;degradation

Q

Non-Moisture Causes of PC Silver Streaks

A

Silver streaks are the most common PC defect but have multiple causes; exclude them item by item in the order of moisture, temperature, shear and contamination to avoid repeated ineffective drying; after confirming effectiveness, solidify the parameters and practices into the work instruction to ...

Material Drying PC;silver streaks;shear;contamination;troubleshooting order

Q

PC Hydrolysis Resistance

A

PC fears high temperature and high humidity; hydrolysis-resistant grades are more stable; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence; include this case in the defect archive as a reference for troubleshooting similar probl...

Material Drying hydrolysis resistancehot humidityaginggrade

Q

PC transparent grade process

A

PC transparent grade clean and low shear, regrind prohibited；After confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence；Include this case in the defect archive as a reference for troubleshooting similar problems in the future

Material Drying transparent gradeopticslow shearpolishing

Q

PC recycled material management

A

PC recycled material moisture content is hard to control, prohibited for performance and transparent parts；After confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence；Include this case in the defect archive as a reference for troubleshooti...

Material Drying recycled materialheat historymoisture contentratio

Q

PC drying equipment selection

A

PC drying needs a dehumidifying dryer as the backstop, hot air ovens are unreliable；After confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence；Include this case in the defect archive as a reference for troubleshooting similar problems in ...

Material Drying dehumidifying dryerdew pointhot air ovenselection

Q

PC hopper heat preservation to prevent moisture regain

A

PC regains moisture quickly, hopper heat preservation at 120℃ and residence not exceeding 2 hours；After confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence；Include this case in the defect archive as a reference for troubleshooting simila...

Material Drying hopper heat preservationmoisture regain120℃residence

Q

PC drying temperature 120℃ upper limit

A

PC drying 120℃ is the upper limit, agglomeration and discoloration are overtemperature signals；After confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence；Include this case in the defect archive as a reference for troubleshooting similar p...

Material Drying drying temperature120℃agglomerationdiscoloration

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