Processing Machinery
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POM homopolymer thermal stability
Problem Phenomenon
Homopolymer POM-H is extremely sensitive to impurities during production, and batch degradation and discoloration occur after material change
Cause Analysis
POM-H has poor thermal stability, and impurities and dirt in the barrel can change its overheating stability; inappropriate pigments, lubricants, or residual material containing GF nylon can all cause quality degradation
Solution
①Thoroughly clean the barrel and screw before POM-H production; ②use PE for transitional cleaning during material change; ③select POM-compatible pigments and lubricants and verify by small-scale test; after adjustment, take continuous samples to verify the effect, and resume mass production only after confirming stability
Key Takeaway
POM-H's cleanliness requirement is higher than that of general materials; barrel cleaning and material compatibility verification are the prerequisites for stable production; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence
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