At a Glance
- 63% Pilferage Complaints Down
- 100% Visible Tamper Evidence
- 2 Weeks to Launch
Destructive-bond validation on courier bag film structures.
Customers needed proof of tampering, not just stronger closure
The packaging supplier was fielding complaints from e-commerce brands who wanted opened parcels to be instantly visible at receipt.
- Conventional closure systems could be peeled and resealed too easily.
- Some competing PSAs lost aggression on recycled film content.
- The supplier needed a fast qualification cycle for multiple bag formats.
Destructive-bond PSA tuned for courier bags and tear-strip constructions
Senda screened peel, aging, and substrate tear behavior until the opening mode was clear and consistent across the customer main structures.
Products Used:
- Courier Bag Security PSA
Built for aggressive closure, visible film tear, and stable sealing on high-speed courier bag lines.
Commercialization path
Film compatibility screening
Virgin and recycled film laminations were tested for peel mode, cohesion, and contamination tolerance.
Abuse simulation
Packages were exposed to heat, compression, and repeated handling to confirm seal stability in the field.
Plant startup support
Senda helped dial in coat weight and release-liner handling to keep conversion efficient at launch.
Security outcome
Security outcome
Pilferage-related complaints dropped after deployment.
Opened bags showed a clear destructive opening signature.
The converter moved from trial approval to shipment quickly.
Related resources
- Optimizing Auto-Bagging Seals: Temperature, Bead Geometry, and Nozzle Maintenance
Tamper-evident seal geometry and bead control for courier bag lines.
- Request a courier bag adhesive trial
Prepaid sample for film tear and tamper-evident seal screening on your bag stock and coextrusion.
" After switching to Senda's courier bag adhesive, we cut tamper-related parcel claims by 30% and finally achieved visible film tear on every forced opening attempt across our high-value fulfillment lanes. "
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