Material Drying
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PEI rapidly re-absorbs moisture after drying
Problem Phenomenon
After passing drying, the moisture content rises back above the standard after 15-30 minutes of exposure to air
Cause Analysis
PEI absorbs moisture extremely fast (saturated 1.25% water absorption); production workshop ambient humidity too high (>60%RH); no sealed connection between drying and '2079851475616104452
Solution
Use a drying hopper for online continuous feeding; transfer dried material in sealed containers or direct hot material conveying; install a dehumidification system in the workshop to reduce ambient humidity
Key Takeaway
The moisture absorption rate of PEI determines that a full-process moisture protection solution must be used
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