Problem & Solution

Practical answers to common plastic material challenges

Browse Articles →

Q

PSU Extrusion Silver Streaks, Bubbles and Drying Level

A

Extrusion moisture 0.01% is 1/5 of '2079851475616104452; drying level must be upgraded; After confirming effectiveness, solidify the parameters and practices into the work instructions to prevent recurrence

Material Drying PSU extrusion moisture content bubbles profiles

Q

PSU Trace Moisture High-temperature Degradation

A

Low water absorption of PSU does not mean water-tolerant processing; even trace water degrades under high-temperature shear; After confirming effectiveness, solidify the parameters and practices into the work instructions to prevent recurrence

Material Drying trace moisture melt degradation high temperature shear

Q

PSU Can Be Stored Long-term at 135°C Without Over-drying

A

There is no such thing as over-drying for PSU; a week at 135°C is safe; only insufficient drying is to be feared; After confirming effectiveness, solidify the parameters and practices into the work instructions to prevent recurrence

Material Drying over-drying 135°C material storage drying time hopper

Q

PSU Wet Material Defects Can Be Recycled

A

PSU wet-material scrap is false scrap; re-molding after drying causes no performance loss, except for degraded material; After confirming effectiveness, solidify the parameters and practices into the work instructions to prevent recurrence

Material Drying wet material recycling hydrolytic stability re-drying reuse

Q

PESU Drying Temperature One Level Higher

A

PESU drying is one level higher than PSU; 177°C×3h is the benchmark; parameters cannot be applied interchangeably; After confirming effectiveness, solidify the parameters and practices into the work instructions to prevent recurrence

Material Drying PESU drying 177°C parameter grading moisture absorption

Q

PSU Drying Temperature and Time Three-level Selection

A

Any of the three PSU drying levels may be chosen but the target is unified; extrusion 0.01% is stricter than '2079851475616104452 0.05%; After confirming effectiveness, solidify the parameters and practices into the work instructions to prevent recurrence

Material Drying PSU drying three-level parameters moisture content dew point

Q

PSU Barrel Temperature Fails to Reach Setpoint

A

PSU high-temperature process places high demands on equipment thermal systems; blower air inlet adjustment is a practical technique; measured temperature exposes the true capability of the equipment.; After confirming effectiveness, solidify the parameters and practices into the work instructions...

Material Drying PSU; barrel temperature; blower; heater band; thermocouple; calibration

Q

Consequences of Incomplete PSU Drying

A

PSU drying quality directly maps to product consistency; gloss and color fluctuations are the appearance of drying problems; record traceability is the foundation of management.; After confirming effectiveness, solidify the parameters and practices into the work instructions to prevent recurrence

Material Drying PSU; drying; gloss; color; MFR; consistency

Q

PSU Drying Equipment Selection

A

PSU drying equipment is an investment, not a cost; dew point -30°C is a hard indicator; the long drying time of 5~7 hours must be guaranteed.; After confirming effectiveness, solidify the parameters and practices into the work instructions to prevent recurrence

Material Drying PSU; drying equipment; dew point; vacuum dehumidification; hot air circulation; moisture

Q

Combined Causes of PSU Silver Streaks and Bubbles

A

The multi-factor superposition characteristic of PSU silver streaks and bubbles requires systematic troubleshooting; verify drying, temperature, venting, and speed item by item; a single measure is difficult to cure.; After confirming effectiveness, solidify the parameters and practices into the ...

Material Drying PSU; silver streaks; bubbles; drying; venting; injection speed

Prev 1 ... 64 65 66 67 68 69 70 ... 144 Next

Categories

All Topics 11636 Material Drying 1439 Injection Molding 1506 Molding Process 740 Molds & Tooling 1506 Processing Machinery 2025 Extrusion & Post 2239 Blow Molding 315 Thermoforming 141 Material Analysis 1343 Production & Quality 382