Skrzetuska Ewa, Agier Michał, Krucińska Izabella
Institute of Material Science of Textiles and Polymer Composites, Faculty of Material Technologies and Textile Design, Lodz University of Technology, 116 Żeromskiego Street, 90-924 Lodz, Poland.
Materials (Basel). 2022 Mar 8;15(6):1992. doi: 10.3390/ma15061992.
The thermal properties of clothing products are influenced by external environmental parameters, such as temperature, humidity, air flow and parameters related to the user's body, which mainly include temperature and humidity. Depending on the type of raw material, its thickness and the material manufacturing technique, clothing products are characterised by certain insulating properties to protect the human body from external factors. A multilayer system made of different material groups can change the thermal insulating capacity significantly, which cannot be determined by the testing of individual layers used in the production. In order to determine the influence of weather conditions on thermal insulation and air permeability, tests were carried out for two types of sleeping bags (summer and autumn) produced by the same manufacturer, differing in insulation thickness. Simulations were carried out using SolidWorks and verified using a Newton thermal mannequin. During tests, both the temperature (range from -20 °C to 20 °C) and humidity values were changed (range 40-80% humidity). For sleeping bags, the effective thermal insulation decreases along with the increase of temperature and decrease of humidity. It can be observed, for the autumn sleeping bags, that for a temperature of 20 °C and humidity of 60%, the thermal insulation is 1.063 m·K·W, while for a temperature of -20 °C and humidity of 60% thermal insulation increases significantly and amounts to 1.111 m·K·W. A similar situation occurs for the effective thermal insulation of a summer sleeping bag (20 °C/60% thermal insulation is 0.794 m·K·W, while for -20 °C/60%-0.851 m·K·W. During the tests, the humidity and temperature between the layers of the clothing system were also controlled, in order to learn more about the influence of these parameters on the thermal insulation properties of the sleeping bags.
服装产品的热性能受外部环境参数影响，如温度、湿度、气流以及与使用者身体相关的参数，主要包括温度和湿度。根据原材料类型、厚度及材料制造工艺，服装产品具有一定的隔热性能，以保护人体免受外部因素影响。由不同材料组构成的多层系统可显著改变隔热能力，这无法通过生产中使用的各层测试来确定。为确定天气条件对隔热和透气性的影响，对同一制造商生产的两种不同隔热厚度的睡袋（夏季和秋季）进行了测试。使用SolidWorks进行模拟，并使用牛顿热人体模型进行验证。测试过程中，温度（范围为-20°C至20°C）和湿度值（范围为40 - 80%湿度）均发生变化。对于睡袋，有效隔热随温度升高和湿度降低而降低。可以观察到，对于秋季睡袋，在温度为20°C且湿度为60%时，隔热为1.063 m·K·W，而在温度为-20°C且湿度为60%时，隔热显著增加，达到1.111 m·K·W。夏季睡袋的有效隔热情况类似（20°C/60%湿度时隔热为0.794 m·K·W，而-20°C/60%湿度时为0.851 m·K·W）。在测试过程中，还对服装系统各层之间的湿度和温度进行了控制，以便更多地了解这些参数对睡袋隔热性能的影响。
