Molds & Tooling
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PPS Poor Surface Gloss
Problem Phenomenon
The part surface is matte and rough, while gloss is normal for other materials in the same mold
Cause Analysis
PPS surface gloss strongly depends on mold temperature: below 120°C, the melt surface layer cools rapidly and replicates poorly; insufficient resin temperature and poor mold surface condition also cause matte
Solution
①Increase mold temperature to 130-150°C; ②Set resin temperature at the upper limit of the window; ③Polish the cavity to improve replication; after adjustment, take continuous samples to verify the effect, and resume mass production only after confirming stability
Key Takeaway
For PPS matte problems, check mold temperature first; 130-150°C is the temperature threshold for glossy surfaces; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence
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