Processing Machinery
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LDPE Creep Characteristics
Problem Phenomenon
LDPE structural parts slowly deform under long-term load, and fasteners loosen and fail
Cause Analysis
LDPE has good toughness but poor creep resistance, and continuously deforms under long-term static load; threaded connections and fastening structures gradually loosen; structural load-bearing applications require caution; when troubleshooting on site, verify item by item according to this mechanism, and avoid blindly adjusting the machine based only on experience
Solution
① Avoid pure LDPE for long-term load-bearing parts; ② regularly retighten fastening structures or change the design; ③ select reinforced or high-density grades when necessary; after adjustment, take continuous samples to verify the effect, and resume mass production only after confirming stability
Key Takeaway
Creep is the ceiling of LDPE structural applications; the contradiction between short-term flexibility and long-term deformation must be resolved by design; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence
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