Extrusion & Post
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PS Product Solvent Cracking
Problem Phenomenon
After contact with solvent, spider-web-like cracks appear on the surface.
Cause Analysis
PS has poor solvent resistance; when internal stress exists, solvents induce environmental stress cracking; printing inks and adhesives are common media.; During on-site troubleshooting, verify item by item according to this mechanism, avoiding blindly adjusting the machine based solely on experience
Solution
①Reduce internal stress; ②Select compatible inks and adhesives; ③Avoid contact with strong solvents; ④Perform compatibility verification.; After adjustment, continuously sample to verify the effect, and resume mass production only after confirming stability
Key Takeaway
Solvent management for PS must run through material selection and post-processing; compatibility verification is indispensable.; After confirming effectiveness, solidify the parameters and practices into the work instructions to prevent recurrence
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