Extrusion & Post
8 views
TPE Overmolding on Nylon Poor Adhesion
Problem Phenomenon
TPE overmolded nylon products have weak interface bonding and delaminate easily.
Cause Analysis
Nylon is highly polar and has poor compatibility with conventional non-polar TPE, making it difficult to form effective bonding at the interface.; during on-site troubleshooting, verify item by item according to this mechanism, avoiding blind machine adjustment based solely on experience
Solution
①Select modified TPE special grades grafted with polar functional groups; ②spray single-component primer on the nylon surface for bridging; ③plasma treatment to improve surface activity; ④jointly develop and test formulations with the supplier.
Key Takeaway
Overmolding nylon is a technical difficulty for TPE bonding; three paths of modified grades, primer and plasma treatment, with joint development being the best solution.; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence
Was this helpful?
0 people found this helpful
Thank you for your feedback!