Thermal Analysis
Mass change measurement constitutes a method for defining the thermal stability of packaging materials and additives. Thermogravimetric analysis records the weight of a substrate sample while the specimen undergoes a controlled temperature program in a furnace. This process tracks mass loss caused by dehydration, oxidation, or the evaporation of volatile components within the structure.
Instrument Mechanics
An analytical balance supports the sample pan inside a chamber where gas flow controls the chemical environment. Precision load cells detect nanogram deviations in mass as the internal heating element rises at a constant rate. Software plots the percentage of mass remaining against the temperature axis to identify specific degradation events.
Different polymer additives exhibit characteristic thermal decomposition profiles that verify the composition of a coating or film layer.
Application Threshold
Converters employ the data to verify that moisture content stays below defined limits for high speed coating operations. Proper formulation of a barrier layer depends on the results provided by thermogravimetric analysis to prevent failure during heat sealing. Thermal stability determines the service life of an adhesive, as molecules breaking down before the application temperature reaches the target leads to bond failure.
The material performance within a print or packing line relies on the chemical integrity maintained throughout the heating cycle.
