Processing Machinery
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LDPE Film Low-temperature Brittleness
Problem Phenomenon
Film used in cold environments shows brittle cracking.
Cause Analysis
Although LDPE has good low-temperature toughness, low-temperature performance decreases when the formulation contains much filler or regrind; insufficient thickness also aggravates brittle cracking.; During on-site troubleshooting, verify item by item according to this mechanism, and avoid blindly adjusting the machine based only on experience.
Solution
①Select a cold-resistant formulation; ②Control the filler and regrind ratio; ③Ensure design thickness; ④Conduct low-temperature testing for verification.; After adjustment, continuously sample to verify the effect, and resume mass production only after confirming stability.
Key Takeaway
Low-temperature applications require dedicated verification; formulation and thickness are the two elements of cold-resistant design.; After confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence
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