In brief
Poor adhesion, incomplete transfer and carrier residue can originate in foil printing, hot pressing or release. Link each defect to its location and process record.
Inspect the failed interface: did graphics remain on the carrier, transfer but detach from the part, or split between layers? Each points to a different path involving release, bonding, contamination or incomplete cure
Inspect the failed interface: did graphics remain on the carrier, transfer but detach from the part, or split between layers? Each points to a different path involving release, bonding, contamination or incomplete cure.
Insufficient heat may prevent transfer; excessive heat may distort graphics or damage the substrate
Insufficient heat may prevent transfer; excessive heat may distort graphics or damage the substrate. Low or uneven pressure creates local misses. Nissha describes roll, plate and vacuum press paths, showing why pressure delivery must fit part geometry.
Check printed layer thickness, drying, blocking during winding and storage age
Check printed layer thickness, drying, blocking during winding and storage age. A periodic defect along the roll suggests stencil or press-cycle causes; failure limited to one part lot points toward surface condition.
Hold material constant and change one of temperature, pressure or speed at a time
Hold material constant and change one of temperature, pressure or speed at a time. Rate transfer completeness, adhesion, appearance and durability, then set a center point and control limits. Use the customer's actual substrate and part geometry.
How do we start a trial?
Provide substrate, controlled artwork, material data, process flow and acceptance criteria. Use representative samples to confirm configuration and process window.
References and fact sources
Original process guidance. Verify equipment fit and performance with customer samples.
Mr. Yang can discuss a trial plan from your film, drawing and acceptance requirements.
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