Gester Instruments | Professional Textile, Footwear and PPE Testing Equipments Manufacturers Since 1997
What are the types of geosynthetics and how to classify them
The raw materials of geotextiles, geomembranes, geocomposites and geotechnical special materials are mainly polyethylene, polypropylene, polyvinyl chloride and other high-molecular polymers. In recent years, geotextiles, geomembranes, and geocomposites have been widely used in water conservancy projects. Geotextiles are divided into two types: woven geotextiles and non-woven geotextiles. Among them, needle-punched non-woven geotextiles have the characteristics of high porosity, high permeability, and good drainage performance. They are often used as drainage reaction in dam projects. Filter facilities are widely used. The geomembrane has good anti-seepage performance, the vertical permeability coefficient is less than 1×10-11cm/s, and the price is cheap, but its CBR bursting strength is low, and it is not suitable for use in engineering parts with high anti-seepage requirements. It is generally used for vertical prevention of dam foundations. Infiltrate. Geocomposite is a product that combines two or more geosynthetics. It has a wide variety and different functions. Among them, composite geomembrane has dual functions of anti-seepage and drainage, and is widely used in dam projects. In recent years, there have been more and more manufacturers of geosynthetics, the scale of production is increasing, the varieties are more and more, and the quality can basically meet the national standards; secondly, the research on geosynthetics has become more and more in-depth, and many countries have formulated Standards or specifications provide a technical basis for the promotion of this material, and the research, production, and design of geosynthetics have gradually matured.
The Heat Contact Machine GT-C101 is a specialized testing instrument designed for evaluating the heat resistance and thermal protective performance of gloves, protective clothing, and other heat-resistant materials used in high-temperature environments. In industries such as smelting, casting, welding, and glass manufacturing, workers are frequently exposed to intense heat, making accurate testing of contact heat resistance essential for ensuring safety and compliance.
GT-C101 simulates real working conditions by measuring heat transfer delay and thermal transmission under instant contact with high-temperature surfaces. Fully compliant with EN 407, EN 702, and ISO 12127-1 standards, this machine provides precise, repeatable data for manufacturers, laboratories, and research institutions. With high-temperature capability up to 500°C, advanced calorimetry, digital monitoring, and adjustable contact speed, the Heat Contact Machine GT-C101 is an indispensable tool for developing and certifying next-generation PPE and heat-insulation materials.
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