A Guide to Medical Device Packaging: Sealing, Validation and ISO Compliance

In medical manufacturing, you never treat the pouch or bag as an accessory. The moment a sterile barrier fails, device integrity is compromised. That is why medical device packaging sits right alongside design controls and sterilization in quality discussions.

Teams that do this well usually have three things in place — packaging built around ISO regulations, a robust sealing validation, and equipment that works the same way on a Monday morning as it does during a spotless audit run.

ISO 11607: The Standard Behind Every Sterile Package

ISO 11607 is the main international standard for the packaging of terminally sterilized medical devices. The FDA recognizes it through 21 CFR, and most global markets defer to it. 

The standard has two parts:

  • Part 1 sets requirements and test methods for materials, sterile barrier systems and complete packaging systems.
  • Part 2 focuses on validation of forming, sealing and assembly processes.

Simply put, it asks you to do more than “make a strong seal.” A setup needs to:

  • Use a packaging system that can maintain sterility from sterilization through transport, storage and shelf life.
  • Develop and validate sealing processes that produce consistent, defect-free seals within a defined process window. 
  • Demonstrate, with evidence, that the process stays in control during routine production, not just in a one-off test.

These expectations apply whether you are a device manufacturer or a medical packaging provider supporting multiple OEMs. 

It's important to understand that ISO 11607 intentionally leaves room for interpretation. Each medical packaging provider is responsible for building a quality system around their own devices, materials and workflows. The standard tells you what outcomes to achieve, but the specifics such as sampling plans, test methods selection and acceptance criteria require informed decisions based on your particular operation. 

How Validation Works: IQ, OQ and PQ

Seal validation follows three sequential phases. Each one answers a specific question and produces documentation that feeds into the next:

  • IQ (Installation Qualification): Is the system set up correctly? You verify equipment configuration, confirm environmental conditions, check utilities and calibration, and review maintenance records. With equipment purpose-built for medical applications, IQ moves quickly.
  • OQ (Operational Qualification): Where does the process work reliably? You seal at minimum and maximum parameter settings, introduce realistic variation and test every seal using standardized methods — dye leak testing (ASTM F1929), seal strength (ASTM F88), visual inspection (ASTM F1886) and burst testing (ASTM F1140).
  • PQ (Production Qualification): Does it hold up on the production floor? Typically, you'll seal three production lots at your nominal parameters with real product inside the pouches, then repeat the full integrity testing suite from OQ. PQ is the evidence that your validated process translates from controlled testing into daily manufacturing. 

What ISO 11607 Requires: Building Your Sealing Process Strategy

It's easy to get lost in clauses and annexes, but for sealing, ISO requirements can be summarized to four ideas:

  1. Define the process window: You identify a range of temperature, pressure and time (or band speed) that consistently produces acceptable seals on your chosen materials. For vacuum and gas flush systems, that window also includes vacuum level and gas parameters. This is where you determine what “good” looks like for your specific combination of materials, device weight and pouch format. 
  2. Validate the process: IQ confirms that the sealer is installed and configured correctly. OQ shows that it can run across the intended parameter range. PQ proves that, under various conditions, the process still produces acceptable packages.
  3. Control the process daily: You monitor critical parameters in real time during production. If temperature, pressure or speed drifts outside the validated range, the sealer alerts the operator or stops the line. This is where equipment capability matters most. A validatable pouch sealer provides continuous parameter verification on every cycle, while general-purpose equipment typically cannot.
  4. Document the evidence: You maintain protocols, reports, calibration certificates, routine monitoring records and batch data that link specific production lots to specific process conditions. This documentation is what connects your validated process to the product on the shelf. 

What to Look for in Sealing Equipment

Your equipment choice determines how practical the entire process will be. Here's what matters most:

  • Continuous parameter verification: The sealer must monitor temperature, pressure and speed on every cycle and flag or halt production if any parameter drifts outside range. Emplex validatable band sealers do this through an integrated PLC system that continuously verifies all three parameters during operation. 
  • Digital control and recipe management: You need the ability to store, recall and look up validated sealing recipes so operators can switch between products without manually reentering parameters. Both the Emplex and VacPack lines feature a 5.7-inch touch screen with recipe storage, production logging, user tracking and maintenance diagnostics. 
  • Data logging and traceability: Every cycle's parameters should be recorded and retrievable, linking batch data to specific process conditions. This is essential for ongoing compliance, revalidation and audit readiness.
  • Cleanroom-compatible construction: For sterile packaging environments, you need sanitary equipment. The Emplex range is built in 304 stainless steel with toolless seal band changeovers and optional NEMA 4/4X washdown ratings. The VacPack series, which is designed for vacuum and gas flush applications, offers the same sanitary construction in a heavy-duty impulse format, sealing bags up to 12 mils (300 microns) thick. 
  • Scalability: Plexpack's lineup covers everything from the compact Emplex MPS 6340 tabletop unit to the ACS7300, which seals at up to 1,500 inches per minute. Both use the same control platform, so scaling up doesn't mean retraining your team. 

Planning for Revalidation

Validation isn't something you complete once and file away. Changes to your packaging system can trigger revalidation. Switching to a different material supplier, adjusting seal width, modifying equipment or even relocating a sealer to a different area of your facility may require you to repeat part or all of the qualification sequence. 

This is another reason why comprehensive data logging matters. When your sealer captures every parameter of every cycle and stores production history in retrievable recipes, demonstrating ongoing process stability becomes a matter of pulling reports, not rerunning studies from scratch.

Build a Validated Sealing Process Designed for Your ISO 11607 Requirements

Sterile packaging is at the intersection of engineering and patient safety. ISO 11607 gives you the framework, and validated sealing equipment gives you the means. A disciplined quality system ties them together into something an auditor can trust and, more importantly, a clinician can rely on. 

Looking to set up a validated sealing process that meets packaging regulations from the start? Plexpack has spent 50+ years helping medical manufacturers choose, configure and qualify Emplex and VacPack systems for their specific packaging needs. Our technical team will walk you through equipment selection, planning and everything in between. 

Reach out for a consultation or call 416-291-8085 to speak directly with our team.