Thermal Testing of Textiles for Claims Validation: Highlighting Thermal Effusivity

C-Therm works with leading textile and apparel brands in quantifying thermal performance with thermal effusivity measurement. Thermal Effusivity (also called “thermal inertia”) is defined as the rate at which a material can absorb heat. It is the thermophysical property that describes whether a textile feels warm and cozy, or cool to the touch, and is related to material thermal properties such as the specific heat capacity and thermal conductivity. The property is measured with the use of C-Therm’s MTPS (Modified Transient Plane Source) method and can be applied to both dry and wetted fabrics. Effusivity is a critical performance attribute of textiles intended to improve thermal regulation of the end user. Product managers, innovation teams and researchers in claims validation are increasingly turning to objective thermal methods for claims validation, eliminating the costly and challenging aspects of human touch panels, which have to be very carefully designed and executed to avoid biasing the data. The leading method employs the patented MTPS sensor technology in characterizing the “Warm Feel” or “Cool Touch” of textiles.

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