Material Analysis
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ASA bonding failure
Problem Phenomenon
After ASA parts are adhesively bonded, insufficient strength causes detachment, stress cracking whitening occurs at cyanoacrylate bonding, and anaerobic adhesive hardly bonds.
Cause Analysis
ASA is compatible with cyanoacrylate but uncured adhesive can induce stress cracking; anaerobic adhesive cures poorly on the ASA surface and bonds weakly; the matching of different adhesive systems with ASA varies greatly.
Solution
①Select adhesive according to material guidelines: acrylic adhesives have good adaptability; ②control cyanoacrylate dosage and ensure rapid curing; ③avoid anaerobic adhesive solutions; ④bonding strength undergoes aging verification according to working conditions.
Key Takeaway
ASA bonding adhesive selection has a clear adaptation and contraindication list; stress cracking risk comes from uncured adhesive; bonding verification must include environmental aging conditions.; After confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence
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