Thermal resistance and moisture resistance of zipper mechanical protection hot plate instrument

The zipper mechanical protection hot plate instrument can measure the thermal resistance and moisture resistance of the fabric more accurately, but the foot skin model test only simulates the heat and moisture transfer process of the garment at the shoulder and upper chest of the human body, and the heat and humidity of the fabric. Resistance training mixed resistance can not replace the thermal resistance and moisture resistance of clothing. The main reasons are: 1. The garments made of fabrics are cut and sewn, and some areas are overlapped and compressed. Lapels, pockets and other parts are multi-layered fabrics, which contain additional breathers of different leathers. Therefore, the original thermal resistance value of the fabric has changed. 2. After the clothing is worn on the person, it also includes the air layer between the clothing and the clothing and the human body. These air layers are included in the thermal resistance of the clothing station, but are not included in the thermal resistance of the fabric. 3. How much the clothing material covers the surface area of u200bu200bthe human body has a great influence on the thermal resistance value of the clothing. The thermal resistance of a piece of clothing when increasing the coverage of the human body is greater than when simply increasing the thickness. Even with the same surface coverage of the human body, due to the different parts and shapes of the human body, the thermal insulation effect is different. 4. The degree of fit and tightness of the same clothing makes the thickness and distribution of the main layer between the layers of the clothing and between the clothing and the surface of the human body different, and the thickness of the air contained in the clothing. hot. Collapse the same mass production of five - a tight-fitting clothing is very loose, although the material area is the same, the thermal resistance can still be very different. 5. After wearing the old clothes, people will compress or stretch the fabric due to different postures and activities, and the zipper mechanically changes the path and flow of the air layer in the clothing, which affects the thermal resistance value of the clothing. 6. After the human body is dressed, the effective heat of the human body increases due to the increase in the heat dissipation of the human body. Therefore, the thermal resistance of the fabric does not represent the thermal resistance of the garment. This article is from City Machinery Co., Ltd., please indicate the source for reprinting: