1.1 本试验方法包括使用防护改进瞬态平面源（MTPS）仪器定量测量机织物、针织物或无纺布的热传导率。 4. 本试验方法适用于各种厚度；然而，在测量期间，试样的厚度必须大于热流的穿透深度。 1.2 该试验方法具有可比性，因为已知热发射率的样品用于在工厂水平校准仪器。通过使用已确定的导热系数、密度和比热特性的计算，确认校准样品的热发射率。 1.3 本试验方法旨在测量环境条件下干燥状态下的织物。 1.4 以国际单位制表示的数值应视为标准值。本标准不包括其他计量单位。 1.5 本标准并非旨在解决与其使用相关的所有安全问题（如有）。本标准的用户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。 1.6 本国际标准是根据世界贸易组织技术性贸易壁垒（TBT）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》中确立的国际公认标准化原则制定的。 ====意义和用途====== 5.1 本试验方法测量加热元件和织物试样之间的热传输速率。衣服的一些舒适性与初始热感觉有关（即初始接触时的冷或热感觉），其中较低的热渗出率值表示温暖的感觉，较高的值表示凉爽的感觉。不同织物的热传导率及其初始感知表面温度对于帮助产品开发人员选择织物非常重要。 5.2 在标准条件下，传感器和被测试样的测量温度应相同。本试验方法可适用于热发射率在35至1700瓦范围内的任何织物 1. / 2. /m 2. ·K。 5.3 空气流量应保持在最小值，以确保测量过程中不会出现温度波动。

1.1 This test method covers the quantitative measurement of thermal effusivity of woven, knitted, or non-woven fabrics using a guarded modified transient plane source (MTPS) instrument. 4 This test method is applicable to a wide range of thicknesses; however, the thickness of the specimen must be greater than the penetration depth of the heat flux during the measurement time. 1.2 This test method is comparative since specimens of known thermal effusivity are used to calibrate the apparatus at the factory level. Thermal effusivity of the calibration specimens are confirmed through calculations that use established properties of thermal conductivity, density, and specific heat. 1.3 This test method is intended for measuring fabrics in a dry state at ambient conditions. 1.4 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this 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. 1.6 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 ====== 5.1 This test method measures the rate of thermal transport between a heating element and a fabric specimen. Some of the comfort properties of a garment relate to initial thermal sensations (that is, cold or warm feeling upon initial contact), where lower thermal effusivity values indicate sensations of warmth and higher values indicate sensations of coolness. The thermal effusivity of different fabrics and their initial perceived surface temperature are important to assist product developers with fabric selection. 5.2 The sensor and the test specimen being measured shall be at the same temperature for measurements at standard conditions. This test method may be applied to any fabric with a thermal effusivity in the range of 35 to 1700 Ws 1 / 2 /m 2 ·K. 5.3 Air flow shall be kept at a minimum to ensure temperature fluctuations do not occur during the measurement.