Molds & Tooling
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PA6 Melt Temperature Upper Limit 280
Problem Phenomenon
To improve filling, the melt temperature is raised to 290°C, and the products become brittle and yellow at the gate
Cause Analysis
After PA6 melt temperature exceeds 280°C, the thermal degradation rate increases significantly, molecular chain breakage causes the molecular weight to decrease, manifested as reduced impact strength, yellowing color, and discoloration near the gate first
Solution
PA6 melt temperature is controlled at 240-270°C, with a maximum not exceeding 280°C; insufficient filling is preferably solved by increasing the injection speed, mold temperature, or improving the gate, and cannot be solved by exceeding the temperature
Key Takeaway
280°C is the red line for PA6 melt temperature; the cost of improving flowability by exceeding the temperature is degradation; after confirming effectiveness, fix the parameters and practices into the work instructions to prevent recurrence
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