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Seal strength, tensile test on strips (temperature range -40 to +120 °C)

Seal strength of machine-made sealings from pouches, sacks, packages, lidding films sealed on trays, cups etc. or sealing samples according DIN 55529 or ASTM F 88 (1 inch or 15 mm wide specimen), DIN EN 868 part 5 appendix D of medical packagings inclusive description of appearance of fracture.

In short — AI-generated

This test determines the mechanical strength of sealed seams in flexible packaging by pulling a defined strip of the seal apart at a constant speed. The test is performed across a temperature range from -40 °C to +120 °C to simulate various storage and usage conditions, following established standards like ASTM F 88 and DIN 55529.

The resulting value indicates the maximum force the seal can withstand before failing, providing essential data on the integrity and reliability of the package. This information helps developers ensure that packaging remains secure during transport and handling, and allows for the assessment of seal performance under extreme thermal stress.

Text is AI-generated; based on test method data curated and verified by Innoform.

Test Method Group: Mechanical properties

Norms:
  • DIN EN 868-5- D (2019-03) Packaging for terminally sterilized medical devices – Part 5: Sealable pouches and reels of porous materials and plastic film construction – Requirements and test methods
  • DIN 55529 (2012-09) Packaging – Determining the sealed-seam strength of sealings made of flexible packaging material
  • ASTM F 88/ F 88M (2023) Standard Test Method for Seal Strength of Flexible Barrier Materials

Required Sample Amount: min ca. 300 mm sealing/ welded seam resp. 10 packages

Standard Tests

seal strength ASTM F 88 (15 mm specimen width)

Specific Norm: ASTM F 88/ F 88M

Sealed seam testing can be carried out either with 25.4 mm strip width and 300 mm/min test speed or with 15 mm strip width and 200 mm/min test speed. This is the second option.

seal strength DIN EN 868 part 5 appendix D (ASTM F 88) medical packages

Specific Norm: DIN EN 868-5- D

Packaging for terminally sterilized medical devices- Sealable pouches and reels of porous materials and plastic film construction- Requirements and test methods

seal strength DIN 55529 Polyolefin films

Specific Norm: DIN 55529

seal strength DIN 55529 laminated films, peel films

Specific Norm: DIN 55529

seal strength ASTM F 88 (1 inch specimen width)

Specific Norm: ASTM F88

Sealed seam testing can be carried out either with 25.4 mm strip width and 300 mm/min test speed or with 15 mm strip width and 200 mm/min test speed. This is the first option.
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