Gester Instruments | Professional Textile, Footwear and PPE Testing Equipments Manufacturers Since 1997
Analysis of Influencing Factors of Fabric's Thermal Performance
Thermal conductivity K is a parameter used to characterize the thermal conductivity of a substance. It is one of the basic physical properties of a substance. The smaller the value, the worse the thermal conductivity of the substance and the better the thermal insulation. The heat conduction system of various textile materials is shown in the table below. Table 1 Thermal conductivity of textile materials (measured at room temperature 20°C) Material K (W/m·°C) Material K (W/m·°C) Cotton 0.071～0.073 Polyester 0.084 Wool 0.052～0.055 Acrylic 0.051 Silk 0.050～0.055 Polypropylene 0.221～ 0.302 viscose fiber 0.055～0.071 spandex 0.042 acetate fiber 0.050 air 0.026 nylon 0.244～0.337 water 0.697 It can be seen from Table 1 that the thermal conductivity of still air is the smallest and is the best thermal insulator. Under normal circumstances, the thermal conductivity of textile materials that we don’t have is actually the thermal conductivity of a mixture of fiber, air and moisture, and the porosity of the fabric is generally 70% to 80%, so the thermal insulation of textile materials is great. The extent depends on the state and amount of air trapped in the fiber layer. Under the premise of non-flowing air, the more air held in the fiber layer, the better the warmth retention of the fiber layer. Therefore, the fabric is soft, thick, and contains a lot of air, and it has good warmth retention. The napped pile fabric has better warmth retention than ordinary fabrics, and it is also because a certain thickness of air layer is maintained between the piles. However, once the air in the fabric flows, the warmth and heat insulation properties of the fabric are greatly reduced. The thermal conductivity of water is relatively large, about 10 times that of general textile materials, and approximately 30 times that of air. Therefore, water has a great influence on the warmth retention of the fabric. Generally speaking, after the fabric is wetted, the thermal conductivity of the fabric will increase and the warmth retention will decrease. More about thermal protection performance tester: http://www.standard-groups.com/TextileGarment/
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Cut resistance is one of the most critical performance indicators in personal protective equipment (PPE) testing, directly affecting worker safety in high-risk industries such as metal processing, machinery manufacturing, and emergency rescue. The TDM Cut Test Machine GT-KC28 plays a vital role in accurately evaluating the cut resistance of PPE products, including gloves, protective clothing, footwear materials, composite materials, rubber, and industrial textiles.
By adopting high-precision force control systems, intelligent data processing, and stable transmission technology, the GT-KC28 TDM Cut Tester can accurately measure the critical cutting force of materials and ensure excellent repeatability and comparability of test results. Its user-friendly touch-screen operation, comprehensive data storage, USB data export, and built-in thermal printer greatly improve laboratory efficiency and data traceability.
The TDM Cut Test Machine GT-KC28 fully complies with major international and national standards such as ISO 13997, EN 388, ASTM F2992/F2992M, ANSI/ISEA 105, and GB 24541-2022, making it a reliable solution for PPE manufacturers, third-party testing laboratories, and research institutions. Through precise and standardized cut resistance testing, the GT-KC28 helps reduce industrial cutting injuries, supports PPE certification across global markets, and ensures that protective equipment delivers reliable safety performance in real-world applications.
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