Material Drying
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Product defects caused by poor drying of high impact polystyrene raw material
Problem Phenomenon
Products show problems such as silver streaks, bubbles, and decreased transparency; the root cause is insufficient raw '2079851475616104451.
Cause Analysis
(1) Raw material absorbs moisture during transportation or storage, moisture attached to the surface
(2) Hopper not sealed, raw material absorbs moisture in the hopper
(3) Drying temperature too low or drying time insufficient
(4) Insufficient dehumidification capacity of drying equipment, high dew point
(5) High ambient humidity, dried raw material re-absorbs moisture
Solution
(1) Use a dehumidifying dryer, drying temperature 70-80°C, time 3-4h
(2) Control raw material moisture content below 0.02% after drying
(3) Cover and seal the hopper, use an insulated hopper when necessary
(4) Dryer dew point temperature ≤-30°C
(5) Control ambient humidity below 50%
Key Takeaway
Raw '2079851475616104451 is the basic process to ensure product quality.
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