Processing Machinery
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PVC Transparent Products
Problem Phenomenon
Transparent PVC parts turned yellow and hazy, transparency failed the standard, and gel particles and impurities were visible
Cause Analysis
Transparent PVC has the highest requirements for formulation and process: the organotin stabilization system preserves transparency; even trace degradation shows yellow; impurities and gel particles have nowhere to hide on transparent parts; during on-site troubleshooting, verify item by item according to this mechanism to avoid blindly adjusting the machine based only on experience
Solution
①Select organotin-stabilized high-transparency grades for transparent parts; ②strictly control temperature to prevent slight degradation; ③high-efficiency filtration and clean production; after adjustment, continuously sample to verify the effect, and resume mass production after confirming stability
Key Takeaway
Transparent PVC is the touchstone of process cleanliness; only excellence in formulation, temperature, and cleanliness can produce high transparency; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence
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