Processing Machinery
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LDPE Low-Temperature Brittleness
Problem Phenomenon
LDPE products crack in low-temperature environments
Cause Analysis
Although LDPE is cold-resistant, low temperature plus notches still poses a brittle cracking risk; when troubleshooting on site, verify item by item according to this mechanism, and avoid blindly adjusting the machine based only on experience; this mechanism has been repeatedly verified by industry data and should be confirmed first during troubleshooting
Solution
Select special grades for low-temperature products; round corners in the structure; verify by low-temperature testing; after adjustment, take continuous samples to verify the effect, and resume mass production only after confirming stability; change only one variable at a time and record parameter changes, so as to locate the effective measure
Key Takeaway
Low-temperature applications require special verification; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence; include this case in the defect archive as a troubleshooting reference for similar problems in the future
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