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Practical answers to common plastic material challenges

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Q

PPO Glass Fiber Grade Drying and Temperature

A

40% glass fiber PPO is another material; the dedicated process card cannot be omitted; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence; include this case in the defect archive as a troubleshooting reference for subsequent similar pr...

Material Drying glass fiber gradeprocess cardmelt temperaturewear resistance

Q

PPO Junlong MPPO Process Baseline

A

MPPO debugging has a baseline parameter table; start with rear 260, front 280, mold temperature 80-100; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence

Material Drying MPPOprocess baselinemold trialparameter table

Q

PPO Regrind Drying Time Extension

A

When PPO regrind particle size changes, diffusion changes, and drying time must be increased; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence; include this case in the defect archive as a troubleshooting reference for subsequent sim...

Material Drying regrind dryingparticle sizediffusioncontamination

Q

PPO Cumulative Drying Time Upper Limit

A

PPO cumulative drying is capped at 8 hours, and re-baking times must be recorded; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence; include this case in the defect archive as a troubleshooting reference for subsequent similar problems

Material Drying cumulative drying8 hoursheat historyre-baking

Q

PPO Drying Temperature Over 150℃ Discoloration

A

150℃ is the discoloration red line for PPO drying; rather extend time than raise temperature; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence; include this case in the defect archive as a troubleshooting reference for subsequent sim...

Material Drying drying discoloration150℃thermal oxidationlight-colored parts

Q

PPO Drying Temperature Level Differences

A

PPO drying levels follow the grade data sheet, with 0.02% moisture content as the unified acceptance; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence

Material Drying drying levelgrade differencedehumidifying dryingmoisture meter

Q

PPO Low Water Absorption Still Requires Standardized Drying

A

Low water absorption of PPO does not mean no drying is needed; 0.02% moisture content is the appearance bottom line; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence

Material Drying PPO dryinglow water absorptionsilver streakmoisture content

Q

PPO Bubbles and Internal Voids

A

PPO internal voids need to be distinguished between gas and vacuum causes; drying and holding pressure each address the corresponding symptom; non-destructive testing is the quality guarantee for thick-walled parts.; After confirming effectiveness, fix the parameters and practices into the work i...

Material Drying PPO; bubble; void; drying; holding pressure; non-destructive testing

Q

PPO Over-Temperature Baking and Aging

A

Both insufficient and excessive PPO drying produce defects; standardized temperature and time is the only correct path; equipment temperature control accuracy needs regular calibration.; After confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence

Material Drying PPO; over-drying; aging; yellowing; toughness; baking

Q

Performance decline from PPO regrind use

A

The 3-time life of PPO regrind is determined by the material characteristics; traceability management prevents over-use; the cracking risk is positively correlated with the regrind ratio.; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent r...

Material Drying PPO; regrind; cracking; heat history; 3 times; blending

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