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Measuring Heat Seal parameters involves Temperature + Pressure + Time. However, maintaining optimal conditions in production and identifying the root cause of poor sealing is a challenge. We measure these parameters by creating controlled seals on a calibrated Laboratory Heat Sealer (ASTM F2029). The seals are then peeled apart with a Seal Strength Tester to measure either Ultimate Seal Strength (ASTM F88) or Hot Tack Strength (ASTM F1921). Adjusting sealing temperature and dwell time helps determine the optimal sealing conditions.

Packaging professionals routinely examining heat seal parameters of incoming film, as part of a robust quality system, this can leverage the measured data to fine-tune the heat sealing process during production, optimising sealing conditions. Sealing parameter disparities are common across film suppliers, rolls, and even within a roll. The introduction of new materials with functional and barrier layers has heightened the need for precise sealing tolerances. Minor variations in sealing parameters can significantly impact seal quality, manifesting as weak seals, channel leaks, edge leaks, back seal/end seal junction leaks, and issues like hardened brittle areas due to overheating or unsealed sections due to under-heating.

To read more about Heat Seal Testing, you can find our Heat Seal Parameters of Flexible Polymer Film and Finished Package Seal Integrity – Quality Control inspection issues white paper HERE.

If you would prefer to let us take care of your testing in the RDM LAB, simply complete the Heat Seal and Hot Tack Testing form HERE and one of our team will contact you with more information.

RDM MEDeSEAL
RDM MEDeSEAL

UK Head Office

RDM Test Equipment Ltd
39 Golds Nurseries Business Park,
Jenkins Drive, Elsenham,
Hertfordshire,
CM22 6JX
United Kingdom

T: +44 (0)1279 817171
F: +44 (0)1279 815743
E: sales@rdmtest.com

USA Head Office

RDM Test Equipment LLC.
441 Old Hwy 8 NW Suite 203
New Brighton
Minneapolis
MN55112
USA

T: +1 651 766 2565
E: sales@rdmtest.com

RDM MEDeSEAL
ASTM standards logo
ISO 9001
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