New Test Method for Measuring the Heat-Flux, After-Chill and Thermal Buffering of Clothing Materials Using a Sweating Hot Plate
1. Scope
1.1 This test method covers the measurement of the heat-flux energy released back to the wearer’s skin by a clothing material’s ability to move and evaporate controlled dosages of water under controlled cool ambient conditions using a sweating hot plate.
1.1.1 This test method establishes procedures for measuring the heat-flux during multiple simulated “sweating” phases and “non-sweating” phases. Calculations are also provided to determine the “after-chill” effects and thermal buffering characteristics to address after-chill sensations in cold environments.
1.2 This test method does not address all properties that affect a clothing material’s ability to lose heat from the body. Consider measuring properties such as air permeability, insulation, and evaporative resistance.
1.3 This test method supplements ASTM F3628, with similar test procedures, but with multiple alternate work-rest cycles with a specific focus on cool conditions, whereas the ASTM F3628 has a focus on maximum evaporative cooling in warm conditions.
1.4 Units - The values in SI units shall be regarded as standard. No other units of measurement are included in the standard.
1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
This test method was created to establish procedures specifically for measuring the heat-flux during multiple simulated “sweating” phases and “non-sweating” phases and addresses the need for multiple, alternating work-rest cycles (sweating/non-sweating phases). Unlike ASTM F3628 which addresses warm conditions, this test method focuses on cool conditions.
