Seal Strength Peel Test Record (ASTM F88)
Record ASTM F88 peel force results for one-inch pouch and lidding seal strips, with traceable setup, specimen prep, measurements, and pass/fail sign-off. Use it to verify seals are strong enough to protect the package without becoming unopenable.
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Overview
This template is a structured record for ASTM F88 seal strength peel testing on one-inch strips cut from pouches and lidding. It is designed to capture the information an inspector or lab technician needs to prove the test was run correctly: product identification, seal location, specimen orientation, equipment calibration, crosshead speed, conditioning, peak and average peel force, seal mode, and final acceptance.
Use it when you need to verify that a heat seal, lidding seal, or pouch closure is strong enough to protect the package but still openable by the intended user. It is a good fit for routine quality checks, validation studies, lot release, and investigations after seal-related complaints or non-conformances. The record also helps when multiple seal configurations are in use, because it keeps the test setup and specimen details tied to the measured results.
Do not use this template as a substitute for leak testing, burst testing, or a full packaging validation protocol. It is not meant for cosmetic inspection only, and it should not be used when the approved method requires a different specimen width, peel angle, or acceptance rule. If the seal is visibly contaminated, wrinkled, or damaged before testing, the record should capture that as a deficiency rather than forcing a normal pass/fail result. The goal is a traceable, defensible record that shows what was tested, how it was tested, and whether the seal met the approved criterion.
Standards & compliance context
- This record supports ASTM F88 seal strength testing by preserving the setup, specimen, and result details needed for a defensible peel test.
- It fits well within ISO 9001:2015 document control and non-conformance handling when seal strength is part of a controlled quality process.
- For regulated packaging programs, the template can support internal controls aligned with FDA expectations, customer specifications, and validated packaging methods.
- If used in a food-contact workflow, the record should align with your sanitation and packaging controls under applicable FDA Food Code-related procedures.
- Where seal failures affect product safety or usability, treat them as quality non-conformances and route them through your corrective action process.
General regulatory context for orientation only — verify current requirements with counsel or the relevant agency before relying on this template for compliance.
What's inside this template
Inspection Details and Traceability
This section ties the test result to the exact product, lot, seal location, and approved procedure so the record can be audited later.
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Test record identifier and date completed
Enter the unique test record ID and the date the inspection was completed.
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Product, pouch/lidding configuration, and lot number identified
Document the product name, package configuration, and lot or batch number under test.
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Seal location and specimen orientation recorded
Identify the seal location, seal direction, and specimen orientation used for the test strips.
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Operator and reviewer identified
Record the person performing the test and the person reviewing the results, if applicable.
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Reference standard and procedure confirmed
Confirm the test is being performed per ASTM F88 and the site-approved SOP or work instruction.
Test Equipment and Setup
This section proves the tester, load cell, grips, and speed settings were suitable for the seal force being measured.
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Universal testing machine or peel tester calibrated and in date
Confirm the test equipment calibration status is current and traceable.
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Load cell capacity appropriate for expected seal force
Verify the installed load cell range is suitable for the expected peel force measurements.
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Grip faces clean and aligned; no slippage observed during setup
Confirm grips are clean, aligned, and capable of holding the specimen without slippage.
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Crosshead speed set per approved method
Record the crosshead speed used for the peel test.
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Specimen width verified at one inch
Measure and record the specimen width used for the peel test.
Specimen Preparation and Conditioning
This section captures how the strips were cut, identified, and conditioned so the peel result reflects the seal, not handling errors.
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Number of specimens prepared
Enter the total number of seal strips prepared for testing.
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Specimens cut cleanly without seal damage or edge distortion
Confirm the seal strips were cut without nicking, stretching, or otherwise damaging the seal area.
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Specimen conditioning time and environment recorded
Document any conditioning time, temperature, humidity, or storage conditions used before testing.
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Seal area free of contamination, wrinkles, or visible defects
Inspect the seal area for contamination, wrinkles, channeling, or other visible non-conformances before testing.
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Specimen identification maintained through test sequence
Confirm each specimen can be traced to the original package or lot throughout the test sequence.
Peel Force Measurements
This section records the actual force data and observed seal behavior that determine whether the package passes or fails.
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Peak peel force recorded for each specimen
Enter the peak peel force observed for the specimen.
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Average peel force recorded for each specimen
Enter the average peel force measured across the peel length, if required by the method or SOP.
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Seal mode observed and documented
Select the observed seal failure or peel mode.
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Specimen opened without excessive force or unopenable seal condition
Confirm the seal could be opened without becoming unopenable or requiring abnormal force.
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Test observations recorded for anomalies
Document any unusual behavior such as jerky peel, slippage, premature failure, or instrument anomalies.
Acceptance, Deficiencies, and Sign-Off
This section documents the final decision, any non-conformance, and who reviewed the result for release or escalation.
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Minimum seal strength acceptance criterion met
Confirm the measured peel force meets the approved minimum seal strength requirement for the product.
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No critical non-conformance identified
Confirm there were no critical deficiencies such as failed specimens, invalid test setup, or seal integrity concerns.
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Deficiencies and corrective actions documented
Describe any non-conformance, disposition, and corrective action taken or required.
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Inspector signature
Inspector sign-off confirming the record is complete and accurate.
How to use this template
- 1. Enter the test record identifier, date, product name, pouch or lidding configuration, lot number, seal location, specimen orientation, operator, reviewer, and the ASTM F88 procedure reference before testing begins.
- 2. Confirm the universal testing machine or peel tester is calibrated and in date, then verify the load cell range, grip alignment, and crosshead speed against the approved method.
- 3. Prepare the one-inch specimens with clean cuts, maintain specimen identification through the sequence, and record conditioning time, environment, and any visible seal contamination or distortion.
- 4. Run each specimen through the peel test, record peak and average peel force, and document the observed seal mode, anomalies, and whether the package opened normally or became unopenable.
- 5. Compare the results to the approved minimum seal strength criterion, record any deficiency or corrective action, and complete the reviewer sign-off for release or escalation.
Best practices
- Cut specimens cleanly and avoid nicking the seal edge, because damaged edges can lower peel force and create a false deficiency.
- Record the exact seal location and specimen orientation for every strip so results can be traced back to the sealing process and tooling.
- Use a load cell range that brackets the expected peel force, since an oversized load cell can reduce measurement sensitivity.
- Verify crosshead speed against the approved method before the first specimen, because speed changes can alter the measured peel profile.
- Document seal mode consistently, such as adhesive failure, cohesive failure, or film tear, so trends are meaningful across lots.
- Photograph or note visible wrinkles, contamination, or incomplete seals at the time of inspection, not after the test run is finished.
- Keep specimen conditioning time and environment consistent across samples so comparisons between lots and shifts remain valid.
- Escalate any unopenable seal condition as a critical item, even if the peak force appears acceptable, because usability and product access matter.
What this template typically catches
Issues teams running this template most often surface in practice:
Common use cases
Frequently asked questions
What does this seal strength peel test record cover?
This template captures ASTM F88 peel test results for one-inch seal strips taken from pouches or lidding. It includes traceability, equipment setup, specimen conditioning, peel force readings, observed seal mode, and final acceptance. It is meant to document whether the seal is strong enough for package integrity without creating an unopenable seal.
When should I use this template?
Use it during incoming quality checks, process validation, routine in-process verification, or complaint investigations involving seal failures. It is especially useful when you need a repeatable record for lot release or when a packaging change could affect seal performance. If your issue is not seal strength but leak integrity, burst resistance, or visual package appearance, a different test record may be more appropriate.
Who should complete the peel test record?
A trained quality inspector, lab technician, or packaging engineer should run the test and enter the results. The reviewer or approver should be someone authorized to release product or escalate non-conformances. If your site uses a competency matrix, assign the record only to personnel qualified on the approved ASTM F88 procedure and the specific test equipment.
How often should seal strength testing be performed?
The cadence depends on your control plan, product risk, and validation status. Many teams use it at startup, after changeovers, after seal parameter adjustments, and at defined intervals during production. You can also use it for periodic verification, lot sampling, or when a defect trend suggests seal variability.
What standards or regulations does this support?
The template supports quality records tied to ASTM F88 for seal strength testing and can be used within ISO 9001:2015 quality systems. For food-contact packaging, it may also support documentation expectations under FDA Food Code-related hygiene and packaging controls where applicable. If the packaging is part of a regulated medical or consumer product workflow, your internal procedures and customer specifications should define the acceptance criteria.
What are the most common mistakes when running this test?
Common mistakes include cutting specimens with damaged seal edges, using the wrong crosshead speed, or recording results without noting seal mode. Another frequent issue is failing to confirm calibration status or using a load cell that is poorly matched to the expected peel force range. Missing specimen conditioning details can also make results hard to compare across lots or shifts.
Can I customize this record for different pouch or lidding formats?
Yes. You can add fields for material structure, seal jaw settings, dwell time, temperature, or product family if those variables matter in your process. Keep the core ASTM F88 fields intact so the record still shows traceability, specimen orientation, force values, and acceptance against your approved method.
How does this compare with ad-hoc notes or a spreadsheet?
Ad-hoc notes often miss the details needed to interpret a seal failure later, such as specimen orientation, conditioning, or the exact seal location tested. This template standardizes the record so results are easier to review, trend, and defend during audits or customer investigations. It also reduces the chance that a critical non-conformance is overlooked because the pass/fail decision was not documented clearly.
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