Material Drying
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Product defects caused by poor drying of styrene-acrylonitrile copolymer raw material
Problem Phenomenon
Silver streaks, bubbles, transparency decline and other problems appear in the product; the root cause is insufficient raw '2079851475616104451.
Cause Analysis
(1) The raw material absorbs moisture during transportation or storage, with moisture attached to the surface
(2) The hopper is not sealed, and the raw material absorbs moisture in the hopper
(3) Drying temperature is on the low side or drying time is insufficient
(4) The drying equipment has insufficient dehumidification capacity, and the dew point is on the high side
(5) Ambient humidity is high, and the dried raw material absorbs moisture again
Solution
(1) Use a dehumidifying dryer, drying temperature 70-80°C, time 3-4h
(2) Control raw material moisture content after drying below 0.02%
(3) Cover and seal the hopper, using an insulated hopper if necessary
(4) Dryer dew point temperature ≤-30°C
(5) Control ambient humidity below 50%
Key Takeaway
Raw '2079851475616104451 is a basic process for ensuring product quality.
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