Processing Machinery
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DSTDP purging difficulty
Problem Phenomenon
DSTDP purging requires 2-3h, time-consuming, affecting changeover efficiency
Cause Analysis
DSTDP adhesion strong, forming a firm adhesive layer on the screw and barrel; DSTDP thermal stability poor, becomes sticky at high temperature, harder to remove
Solution
1) Before purging, flush with high-viscosity PE to carry away DSTDP residue; 2) lower purging temperature below the DSTDP softening point to reduce adhesion; 3) use dedicated purging compound
Key Takeaway
Purging difficulty is caused by strong DSTDP adhesion; PE flushing and temperature reduction are key
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