Why Metal Flocking Adhesive Fails After Heat Aging
Metal flocking failure after heat aging may come from surface contamination, oxide layer, film thickness, drying condition or the final service environment.
Use this note to
Key points
Clean oil, dust and loose oxide before treating the test as an adhesive failure.
Record adhesive film thickness, drying condition and flock type.
Heat resistance should be confirmed with the buyer's real metal part and aging method.
Locate the failure interface
Before changing the adhesive, check whether flock released from the adhesive film, the film released from the metal, or the metal coating or oxide layer failed.
Oil, cleaning residue and loose oxide can pass an initial hand test and separate after heat exposure.
Repeat the test with controlled variables
Record cleaning, primer, film thickness, open time and drying before heat aging. Use the same flock and metal batch when comparing samples.
The test temperature and time should reflect the buyer's acceptance method. They should not be converted into a general service-temperature claim.
Failure interfaceCleaning recordOxide or coating conditionFilm thicknessHeat-aging method
Before requesting a sample
Turn the article into project information
Confirm substrate and surface treatment.
Record coating, bonding or installation method.
Define the failure or target performance.
Use a named test condition and acceptance method.
List required documents: TDS, SDS, COA or sample.
Related applications
Open the application route to review substrates, process factors, failures, product options and sample details.
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