Problem & Solution

Practical answers to common plastic material challenges

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Q

PA6 Regrind Problems

A

PA6 regrind = 'proportion + drying' dual control: nylon regrind absorbs moisture fast and degrades fast; repeated reuse has high risk, and key stressed parts resolutely use new material; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent rec...

Material Drying PA6; regrind; strength; drying; proportion

Q

PA6 Product Bubbles

A

PA6 bubbles follow the three-way division of 'water, vacuum, decomposition': first verify drying, then look at holding pressure, and finally control temperature; moisture content of nylon material is the most common source of bubbles, and drying verification must come first.

Material Drying PA6; bubbles; moisture content; vacuum bubbles; decomposition

Q

PA6 Hydrolysis Causes Sharp Strength Drop

A

PA6 hydrolysis = 'irreversible invisible killer': products with normal appearance may already be performance-scrapped; drying is PA6's performance insurance, and directly molding wet material is tantamount to delivering scrap to the customer.

Material Drying PA6; hydrolysis; strength; molecular weight; drying

Q

PA6 Silver Streaks from Insufficient Drying

A

PA6 silver streaks = 'drying is the first suspect': verify moisture before adjusting the machine; PA6 absorbs moisture quickly and has a strict window, drying is both an appearance gate and a performance gate, and moisture content verification must be included in the startup SOP and cannot rely o...

Material Drying PA6; silver streaks; drying; moisture content; dew point

Q

PA12 Transparent Grade Processing

A

The cleanliness of transparent PA12 is its transparency; both drying and temperature are strictly controlled; 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 troublesh...

Material Drying transparent PA12dryingtransparencycleanliness

Q

Dimensional Stability Advantage of PA12 Low Moisture Absorption

A

Moisture absorption 0.25-0.9% versus 2.5-3.5%, PA12 is the dimensionally stable nylon answer; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence

Material Drying low moisture absorptiondimensional stabilityPA6 comparisonprecision parts

Q

PA12 FDM Filament Drying and Clogging

A

FDM filament is dried at 60℃×4h, sealed for use, and 30 minutes of exposure is the upper limit; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence

Material Drying FDM filamentdryingnozzle cloggingbubbles

Q

PA12 SLS Pore Defects

A

For SLS pores, first dry the powder and then raise preheating, with laser power assisting gas discharge; 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 troubleshootin...

Material Drying SLS porespowder dryingpreheatingdensity

Q

PA12 Silver Streak Multi-cause Troubleshooting

A

The four causes of silver streaks are drying, temperature, speed, and impurities; when drying is ineffective, check further down; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence; include this case in the defect archive as a ref...

Material Drying silver streaksdryingmelt temperatureimpurities

Q

PA12 Hopper Re-humidification and Heat Preservation Management

A

Passing drying only covers the present; hopper re-humidification management preserves the result; 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 simil...

Material Drying hopper re-humidificationinsulated hopperbatch feedingsilver streaks

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