Molds & Tooling
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Stratification and segregation of PET blended materials
Problem Phenomenon
PET pellets, color masterbatch, recycled material and other components stratify and segregate in the hopper or during conveying, causing uneven composition.
Cause Analysis
The particle size and density of each component differ greatly; the hopper flow pattern causes segregation; conveying vibration aggravates separation.
Solution
Use components with matched size and shape (uniform granulation); use a mixer in the hopper; adopt forced metering feeding.
Key Takeaway
PET blended material uniformity is the prerequisite for product consistency.
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