Extrusion & Post
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TPE Delamination (Material Contamination)
Problem Phenomenon
Layered peeling appears on the product surface.
Cause Analysis
Wrong resin remaining in the hopper, insufficient cleaning during material change, recycled material contamination or mixing; incompatible resin cannot fuse with the matrix forming a weak interface.; during on-site troubleshooting, verify item by item according to this mechanism, avoiding blind machine adjustment based solely on experience
Solution
①Thoroughly clean the hopper and barrel; ②standardize the material change process; ③classified management of recycled material; ④check the cleanliness of the storage and conveying system.; after adjustment, continuously sample to verify the effect, and resume mass production only after confirming stability
Key Takeaway
Delamination mostly originates from material contamination; clean management and standardized material change are the root of prevention.; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence
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