Processing Machinery
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PMMA Bonding Bubbles and Whitening
Problem Phenomenon
Bonded products show bubbles and whitening at the bonding surface, and bonding strength is also affected.
Cause Analysis
Unclean bonding surfaces or improper operation seal air into the adhesive layer; rapid evaporation of the adhesive also causes whitening and bubbles.; During on-site troubleshooting, verify item by item according to this mechanism to avoid blindly adjusting the machine based on experience alone.
Solution
①Thoroughly clean the bonding surface; ②standardize glue application and lamination operation; ③post-cure at constant 60℃ for 2 hours after bonding; ④select a matching adhesive.; After adjustment, continuously sample to verify the effect, and resume mass production only after confirming stability.
Key Takeaway
Bonding quality depends on surface cleanliness and curing management; post-curing both removes bubbles and relieves stress, and is a standard process for bonded parts.; After confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence.
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