Problema e solução

Respostas práticas para os desafios comuns dos materiais plásticos

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Q

PA66 sealed conveying system

A

Dried material conveying must be closed-loop to keep dry, small-capacity machine hoppers reduce exposure; 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 su...

Material Drying PA66sealed conveyingclosed loophopper

Q

PA66 dried material moisture regain time limit

A

PA66 dried material use time limit is counted in minutes, sealing and heat preservation are hard requirements; 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 f...

Material Drying PA66moisture regaintime limitsealing

Q

PA66 rapid moisture content detection

A

On-site rapid screening plus laboratory arbitration two-level detection is a practical solution; 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 ...

Material Drying PA66moisture contentrapid detectionKarl Fischer

Q

PA66 insufficient drying time

A

Drying time must allow core moisture to fully diffuse out, sampling confirmation is the bottom line; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence

Material Drying PA66drying timecore moisturesampling check

Q

PA66 drying temperature window

A

PA66 drying window 80-90℃×4-6 hours, overtime and over-temperature both cause problems; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence

Material Drying PA66drying temperaturethermal oxidationdegradation

Q

PA66 dehumidifying drying dew point

A

PA66 drying is premised on low-dew-point dehumidification, ordinary ovens cannot meet the requirement; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence

Material Drying PA66dehumidifying dryingdew pointmoisture content

Q

PA66 over-drying embrittlement

A

PA66 drying has over-drying risk; 0.1-0.2% is the target range, overtime heat preservation with temperature reduction is the standard handling for production handover; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence

Material Drying PA66; over-drying; embrittlement; 110℃; thermal oxidation

Q

PA66 30-minute time limit after drying

A

30 minutes is the exposure time limit for dried PA66; heat-preserving hopper plus sealed feeding, keeping the dried state until the injection moment, counts as completing drying; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence

Material Drying PA66; moisture regain; 30 minutes; heat-preserving hopper; sealed feeding

Q

PA66 drying equipment selection

A

Equipment selection determines the lower limit of PA66 drying; dehumidifying dryers are a must-have configuration, ordinary hot air drying equals no drying in wet seasons; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence

Material Drying PA66; dehumidifying dryer; dew point; -30℃; equipment selection

Q

PA66 drying temperature upper limit 90℃

A

PA66 drying temperature upper limit 90℃ is stricter than PA6; what over-temperature brings is not more dryness but oxidative degradation, over-dried material can only be scrapped; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence

Material Drying PA66; drying temperature; 90℃; oxidative yellowing; over-drying

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