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Sweating Guarded Hotplate GT-C98 Guide: Find the Right Testing Machine for Your Needs
Sweating Guarded Hotplate GT-C98 Guide: Find the Right Testing Machine for Your Needs
In industries such as textile and apparel, PPE equipment, and outdoor gear, the thermal resistance and moisture resistance of materials directly determine the wearing comfort, protective performance, and user experience of products. The Sweating Guarded Hotplate GT-C98 is a professional testing device designed for this purpose. It can simulate the heat dissipation and sweating process of human skin and provide reliable data support for material comfort evaluation.
I. What is the Sweating Guarded Hotplate GT-C98
Human skin, as a natural temperature and humidity regulation organ, maintains body temperature stability through heat dissipation and sweating. Clothing materials, acting as the medium between the skin and the external environment, have thermal resistance (the ability to resist heat transfer) and moisture resistance (the ability to resist water vapor penetration), which directly affect human thermal balance and comfort. Traditional testing methods mostly rely on manual experience or simple temperature measurement, which have large errors and strong subjectivity, and cannot meet the precise requirements of industrial production and professional R&D. Sweating Guarded Hotplate to determine the thermal and evaporative resistance of clothing materials, under standard test environment, heat the fixed aluminum or copper. Keep them to maintain a fixed temperature and heating power.
II. Test Principle of Sweating Guarded Hot Plate
Keep them to maintain a fixed temperature and heating power. At the same time, after covering the aluminum or copper with test fabric, do the power test under the same situation, and test the size of test platen with the power difference. And then determine the thermal or dampness of the test sample.
III. Test Standards for Thermal Resistance and Water-vapor Resistance Tester
Sweating Guarded Hot Plate Standards:
GB/T 11048, ISO 11092, ASTM F 1868, ASTM D 1518-85, JIS L1096-2010, ASTM D6701
ISO 11092
Textiles — Physiological effects — Measurement of thermal and water-vapour resistance under steady-state conditions (sweating guarded-hotplate test)
ISO 11092:2014 specifies methods for the measurement of the thermal resistance and water-vapour resistance, under steady-state conditions, of e.g. fabrics, films, coatings, foams and leather, including multilayer assemblies, for use in clothing, quilts, sleeping bags, upholstery and similar textile or textile-like products.
The application of this measurement technique is restricted to a maximum thermal resistance and water-vapour resistance which depend on the dimensions and construction of the apparatus used (e.g. 2 m²·K/W and 700 m²·Pa/W respectively, for the minimum specifications of the equipment referred to in ISO 11092:2014).
ASTM F 1868
Standard Test Method for Thermal and Evaporative Resistance of Clothing Materials Using a Sweating Hot Plate.
The thermal resistance and evaporative resistance provided by fabrics, films, coatings, foams, and leathers, including multi-layer assemblies, is of considerable importance in determining their suitability for use in fabricating protective clothing systems.
The range of this measurement technique for intrinsic thermal resistance is from 0.002 to 0.5 K·m²/W and for intrinsic evaporative resistance is from 0.0 to 1.0 kPa·m²/W.
ASTM D 1518-85
Standard Test Method for Thermal Transmittance of Textile Materials
This test method measures the thermal resistance of battings and batting/fabric systems under steady-state conditions by evaluating heat transfer from a warm plate to a cool atmosphere, either in still air or with airflow. The method applies to materials with thermal resistance between 0.1 and 1.5 K·m²/W and thicknesses up to 50 mm, also assessing bulk density, insulation per unit thickness, and insulation per unit weight.
ASTM D6701
Standard Test Method for Determining Water Vapor Transmission Rates Through Nonwoven and Plastic Barriers
This test method covers a procedure for determining the rate of water vapor transmission ranging between 500 to 100,000 g/(m²·day) through nonwoven and plastic barrier materials. The method is applicable to films, barriers consisting of single or multilayer synthetic or natural polymers, nonwoven fabric, and nonwoven fabrics coated with films up to 3 mm (0.1 in.) in thickness.
This test method provides for the determination of:
(1) water vapor transmission rate (WVTR), and
(2) the permeance to water vapor.
JIS L1096-2010
JIS L 1096 evaluates the physical characteristics of textiles, including strength, thickness, air permeability, and shrinkage.
GB/T 11048
Textiles — Physiological effects — Measurement of thermal and water-vapour resistance under steady-state conditions (sweating guarded-hotplate test)
This international test method is widely used to assess thermal and water vapor resistance of fabrics, foams, and other single-layer or multi-layer textile products. Flat material specimens are placed on a sweating guarded hotplate, often referred to as a skin model. Thermal resistance is measured under fixed environment conditions and a dry hotplate surface. Water vapor resistance is measured under different fixed environment conditions and a water-saturated hotplate surface.
IV. Industries and Application Scenarios for GT-C98 Thermal Resistance and Water-vapor Resistance Tester
The Sweating Guarded Hotplate GT-C98 is suitable for a wide range of industries and application fields, including:
Functional apparel and sportswear development
Testing of protective clothing, firefighting suits, and military/police equipment
Moisture permeability evaluation of outdoor clothing and jackets
Testing of medical and epidemic prevention protective materials
Quality control for fabric manufacturers
Third-party testing laboratories and research institutes
V. Technical Advantages of Sweating Guarded Hotplate (SGHP)
1. Equipped with Sweating Guarded Hotplate (SGHP) that fully simulates human skin structure.
2. Separately designed temperature test chamber; integrated control system and automatic supply system.
3. Automatic water supply, drainage and powerful water adding system; faster heating plate permeability during dampness test.
4. High-precision automatic platform moving system with automatic positioning according to specimen thickness; fast steady test state and automatic PID parameter adjustment.
5. Patented wind parallel stabilization system, 0–1.2m/s continuously adjustable wind speed, dedicated heating protection ring, LED soft lighting, USB/WIFI support, full stainless steel housing, complete with test software and multiple test standards.
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