Seal Integrity Inspection FAQs

Seal integrity inspection verifies the seal is:

• Present and continuous
• Proper width and placement
• Free of wrinkles, gaps, burn-through, contamination, or misalignment

It is used to prevent leaks, spoilage, returns, and compliance issues.

Vision systems commonly detect:

• Seal continuity breaks and gaps
• Seal width variation and misplacement
• Wrinkles and folds that compromise seal contact
• Burn areas or overheated regions (appearance-based cues)

Weak seals that appear visually normal may require complementary testing (leak/pressure), but vision is excellent for structural seal defects.

Yes—these defects have recognizable visual signatures:

• Wrinkles and folds create non-uniform seal edges and texture
• Fishmouths show open corners or incomplete contact
• Seal width becomes inconsistent

AI can be especially useful when wrinkle patterns vary widely.

Clear materials often require:

• Backlighting to reveal seal boundaries and layers
• Polarization to combat glare
• Careful camera angles to avoid reflections
• Controlled enclosures to block ambient light

The goal is repeatable contrast between sealed and unsealed regions.

Common contributors include:

• Heat drift (under/over temperature)
• Pressure misalignment or worn tooling
• Contamination in the seal area
• Film tracking issues and misregistration
• Product trapped in seal zone

Vision data helps correlate defect type/location with specific process causes.

Often yes, especially if contamination changes texture or opacity:

• Optimize lighting to enhance contamination contrast
• Use zone-based detection focused on the seal band
• Use AI classification if contamination looks different across products

For very subtle contamination, combining vision with process controls is recommended.

• Vision inspection: detects visible seal formation issues (gaps, wrinkles, contamination)
• Leak testing: verifies functional containment by pressure/vacuum/flow methods

Many lines use vision as 100% inspection and leak testing as validation or sampling, depending on risk and regulation.

High-speed seal inspection typically uses:

• Strobe lighting to freeze motion
• Encoder/trigger synchronization for consistent capture
• Fast edge processing for pass/fail decisions
• Robust mounting/enclosures for stability

Speed capability depends on exposure time, processing speed, and how stable the package presentation is.

Common metrics include:

• False Accept Rate (FAR): defects passing incorrectly
• False Reject Rate (FRR): good parts rejected
• Repeatability across shifts/material lots
• Sensitivity margin using known defect sets
• Uptime, bypass rate, and operator interventions

Regulated environments often add formal IQ/OQ/PQ-style documentation.