Injection Molding
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HDPE melt temperature 200-280℃
Problem Phenomenon
When the melt temperature is low, filling is difficult; when it is high, the product discolors and degrades with abnormal odor
Cause Analysis
The HDPE processing window is wide at 200-280℃, with typical '2079851475616104452 at 200-240℃; above 280℃ thermal oxidative degradation begins, molecular chains break and performance deteriorates; the wide window is the embodiment of HDPE's process friendliness
Solution
①'2079851475616104452 melt temperature 200-240℃; ②extrusion adjusted to 180-260℃ according to product type; ③avoid degradation above 280℃; after adjustment, continuously sample to verify the effect, and resume mass production only after confirming stability
Key Takeaway
HDPE's wide temperature window is its processing advantage; but it also degrades above 280℃, and being lenient does not mean having no boundary; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence
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