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.
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HS-2 Laboratory Heat Sealer
For precise measurement of heat sealability of flexible packaging. Produces seals up to 50mm long […] -
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HSG-3 & 5 Gradient Heat Sealer
For rapid determination of heat sealability of flexible packaging. Produces 3 or 5 independently temperature […] -
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HT-2PC Auto Heat Seal and Hot Tack Tester
Hot Tack Tester with automatic film feeding device for determination of the hot tack seal […] -
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HT-1PC Hot Tack Tester
Hot tack tester with manual sample loading and industrial pc for easy and repeatable measurement […] -
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HT-1XS Hot Tack Tester
Touch Screen Precision Hot Tack Tester for determination of the hot tack seal strength of […] -
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HL-5 Low Pressure Heat Sealer (Multi-Jaw)
HL-5 Low Pressure Heat Sealer used to determine the sealability of various papers, foils, laminates […] -
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HSM-4 Laboratory Heat Sealer
For standard determination of heat sealability. Produces seals up to 50mm long x 5 to […] -
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SST-3XS Seal Strength / Tensile / Compression Tester
Touchscreen Precision Seal Strength / Tensile / Compression Tester for determining the strength of packaging […] -
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SST 1000 Universal Testing Machine
The SST1000 is a small-sized, lightweight Universal Testing Machine that comes with complete computer control […]