Processing Machinery
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Low-temperature brittle cracking of PP products
Problem Phenomenon
PP products used in cold environments develop brittle cracks.
Cause Analysis
Homopolymer PP has poor low-temperature toughness, with obvious brittleness below 0℃; notch sensitivity is amplified at low temperature.; during on-site investigation, verify item by item according to this mechanism to avoid blindly adjusting the machine based only on experience
Solution
①Select copolymer PP grades for low-temperature applications; ②avoid notch and sharp corner design; ③perform low-temperature impact verification; ④evaluate toughening modification.; after adjustment, continuously sample and verify the effect, and resume mass production after confirming stability
Key Takeaway
Material selection for low-temperature applications is the first line of defense; copolymer grades and structural optimization are double insurance.; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence
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