1.1 该测试方法包括通过服装材料在受控环境条件下使用出汗的热板移动和蒸发受控剂量的水的能力来测量释放回穿着者皮肤的冷却能。 1.1.1 该试验方法建立了在模拟“出汗”阶段和干燥阶段测量冷却能量的程序。还提供了通过将衣物材料与可能损失的最大能量进行比较来确定干燥时间以及衣物材料在帮助液态水蒸发方面的效率的计算。 1.2 该测试方法并没有解决影响服装材料从身体散热能力的所有特性。考虑测量透气性、绝缘性和耐蒸发性等特性。 1.3 以国际单位制表示的数值应视为标准。标准中不包括其他计量单位。 1.4 本标准并不旨在解决与其使用相关的所有安全问题（如有）。本标准的使用者有责任在使用前制定适当的安全、健康和环境实践，并确定监管限制的适用性。 1.5 本国际标准是根据世界贸易组织技术性贸易壁垒委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认的标准化原则制定的。 ====意义和用途====== 4.1 当试图在活动时最大限度地为穿着者带来凉爽和舒适的益处时，服装材料通过管理液体水分来帮助液体汗液蒸发的能力是相当重要的。 了解有多少能量被释放回皮肤，对于确定它们是否适合用于制造防护服系统或运动服至关重要。 4.1.1 释放回佩戴者的冷却能量会受到环境条件的显著影响。当使用在标准测试条件下测量的标准结果来确定材料在测试条件之外的条件下的适用性时，必须格外小心。 4.2 该测试方法考虑了服装材料在出汗阶段帮助蒸发液态水的能力，以及在出汗停止后干燥的能力。 4.2.1 在积极工作（出汗）过程中，衣服材料释放出的大量冷却能量通常被视为积极因素，因为它有助于保持身体凉爽。 4.2.2 在积极工作（不出汗）后，衣服材料释放出的大量冷却能量通常被视为负面影响，因为它会对穿着者产生寒蝉效应。 4.2.3 衣服材料变湿后干燥的时间越长，就被认为是负面的，因为这会增加让穿着者感到寒冷的可能性。 4.3 然而，人与环境之间的热交换是一个极其复杂的问题，除了稳定的热交换外，还涉及许多因素- 织物、薄膜、涂层、泡沫和皮革（包括多层组件）的状态电阻值。因此，由液体蒸发提供的冷却可以指示也可以不指示特定材料或系统对于给定服装应用的相对优点。虽然织物测试产生的测量结果可能是服装性能的指标，但尚未证明与人们所穿服装系统的性能相关。在评估服装材料时，考虑测量其他服装材料的性能，如热阻和蒸发阻力。 4.3.1 根据试验方法，在环境室中用标准出汗热板测量服装材料的耐热性和耐蒸发性 F1868 .

1.1 This test method covers the measurement of the cooling energy released back to the wearer’s skin by a clothing material’s ability to move and evaporate controlled dosages of water under controlled ambient conditions using a sweating hot plate. 1.1.1 This test method establishes procedures for measuring the cooling energy during a simulated “sweating” phase and in a drying phase. Calculations are also provided to determine the drying time and how efficient the clothing material is at assisting in the evaporation of liquid water by comparing it to the maximum amount of energy that can be lost. 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 The values in SI units shall be regarded as standard. No other units of measurement are included in the standard. 1.4 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. 1.5 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. ====== Significance And Use ====== 4.1 A clothing material’s ability to assist in the evaporation of liquid sweat by managing liquid moisture is of considerable importance when trying to maximize cooling and comfort benefits to the wearer while active. Understanding how much energy is released back to the skin is critical in determining their suitability for use in fabricating protective clothing systems or athletic wear. 4.1.1 The cooling energy released back to the wearer can be significantly affected by environmental conditions. Extreme care must be taken when using standard results measured under standard testing conditions to determine a material’s suitability for use in conditions outside the testing conditions. 4.2 This test method accounts for a clothing material’s ability to assist in evaporating liquid water during a sweating phase, as well as its ability to dry after the cessation of sweating. 4.2.1 A large amount of cooling energy released from clothing materials during active work (sweating) is often seen as a positive, as it would assist in keeping the body cooler. 4.2.2 A large amount of cooling energy released from clothing materials after active work (no sweating) is often seen as a negative, as it known to cause a chilling effect to the wearer. 4.2.3 The longer it takes for a clothing material to dry after becoming wet is perceived as a negative, as it increases the potential for chilling the wearer. 4.3 The thermal interchange between people and their environment is, however, an extremely complicated subject that involves many factors in addition to the steady-state resistance values of fabrics, films, coatings, foams, and leathers, including multi-layer assemblies. Therefore, the cooling provided from liquid evaporation may or may not indicate relative merit of a particular material or system for a given clothing application. While a possible indicator of clothing performance, measurements produced by the testing of fabrics have no proven correlation to the performance of clothing systems worn by people. Consider measuring other clothing material properties such as thermal resistance and evaporative resistance when evaluating a clothing material. 4.3.1 The thermal resistance and evaporative resistance of clothing materials are measured with a standard sweating hot plate in an environmental chamber in accordance with Test Method F1868 .