Interpretation of Sweating Thermal Manikin Skin Preparation Method

Sweating Thermal Manikin is a kind of ecological experimental equipment gradually developed in the 1940s. It has undergone 4 generations of updates. The latest generation of Sweating Thermal Manikin can simulate human walking, climbing and other physiological actions such as sweating and breathing. Activity [1]. Human testing is not suitable for some extreme test conditions, and due to the existence of individual differences, the repeatability of human testing is not ideal. Therefore, Sweating Thermal Manikin, as a real simulator, has gradually become a common device in garment ergonomics research.

 

Walter Sweating Sweating Thermal Manikin is a typical fourth-generation Sweating Thermal Manikin. Its advantage is that it can simultaneously measure the thermal resistance and moisture resistance of clothing, two extremely important parameters in the study of clothing comfort. The dummy's whole body sweating skin is made of fabrics with the same moisture permeability, that is, all parts of the dummy's whole body have the same sweating rate, but the sweating rate of each part of the real human body is different. In order to make Walter sweat Sweating Thermal Manikin to achieve the purpose of human body sweating ratio, this paper adopts liquid addition type silica gel, uses the scraping method to prepare silica gel coating, and determines the best coating process by analyzing the moisture permeability of the coating, using Fractal principle and thermal resistance of silicone coating, moisture resistance, determine the best way to apply the coating, and prepare non-uniform sweating skin; then use 2 kinds of overall sweating skin for WalterSweating Thermal Manikin naked and dressed The thermal resistance and moisture resistance measurement results were compared and analyzed.
 

Experimental part

 

1. Experimental materials

 

Addition-type liquid silica gel is provided by Dongguan Hongfeng Silicone Co., Ltd. It is composed of two components, A and B, and the silicone liquid can be obtained by mixing the two components.

 

Walter Sweating Sweating Thermal Manikin Skin is made of fabric provided by Tianjin Demino Clothing Company with an area density of 190 g/m2.

 

2. Experimental equipment

 

YG(B)216-Ⅱ type moisture permeable box (Wenzhou Darong Textile Instrument Co., Ltd.), YG606G textile thermal resistance and moisture resistance tester (China Ningbo Textile Equipment Co., Ltd.), CP4202C electronic balance (Shanghai Ohaus Co., Ltd. ), DW-2 electric stirrer (Gongyi Yingyu Hi-Tech Instrument Factory), DZF-6020 vacuum drying oven (Gongyi Yingyu Hi-Tech Instrument Factory).

 

3. Preparation of silica gel coating

 

Mix the A and B components of the liquid addition type silica gel in different proportions, stir for 10 minutes, put them in a vacuum drying oven for vacuum degassing treatment, and use a scraper roller to apply the liquid silica gel to the skin fabric after the degassing is completed On the inner side, let it stand at room temperature for 2 h, and the coating is prepared after the silica gel is cured. By adjusting the proportion of silica gel components and the thickness of scraping coating, the coatings with mass ratios of 1:1, 1:3, 1:5 and 1:7 and coating thicknesses of 0.15, 0.3, 0.5 and 1 mm were prepared. layer samples.

 

4. Experimental method

 

The coating process is determined by the moisture permeability test of the silica gel coated cloth prepared with different thicknesses and different proportions of silica gel components. The coated cloth with fractal structure was prepared by this coating process, and the optimal coating method was determined by comparing the thermal and wet comfort of coated cloth with different fractal dimensions. Using this coating method to scratch the original skin of WalterSweating Thermal Manikin according to the sweat distribution of the real human body, a non-uniform sweating skin was obtained, and the two skins were compared experimentally.