Analysis of factors affecting ventilation resistance and air permeability of medical masks
At present, the types of masks circulating on the market are generally divided into air filter masks and air supply masks, and air filter masks are more widely used, such as dust masks, anti-haze masks, medical protective masks, etc. Types of masks have issued corresponding standards to regulate the mask market. Most of the protective filter mask standards implemented in our country are mandatory product standards, and there are many testing items. Among them, the ventilation resistance and air permeability of medical masks are routinely required performance, and the mask ventilation resistance tester is a common device for testing ventilation resistance. (Hong Kong) Co., Ltd. is a manufacturer, welcome to inquire. The mask ventilation resistance tester is suitable for measuring the ventilation resistance of medical surgical masks, disposable medical masks and civilian masks. Applicable standard: YY 0469-2011 Medical surgical mask YY 0969-2013 Disposable medical mask EN 14683: 2014 Main parameters: 1. Air source: suction type; 2. Air flow: 8L/min; 3. Sealing method: end face 4. The breathable diameter of the sample: Ф25mm; 5. The range of the differential pressure sensor: 0～500Pa. In addition, the fabric air permeability tester is used to detect the air permeability of fabric materials such as masks. The air permeability of the fabric is a characteristic of the fabric itself, which has a great relationship with the fabric structure and the combination of the fabric. The main components of masks are textile fiber materials, and breathability is also an essential feature of masks. The ventilation performance of the mask also determines other protective characteristics such as the comfort and filtration efficiency of the mask to a certain extent. At present, there is no more targeted testing standards for the breathability testing of masks, mainly referring to the testing methods for the breathability of fabrics, such as GB/T 5453-1997 'Determination of the breathability of textile fabrics', ASTMD 737-1996 'The breathability of textiles' Test Methods' and ISO 9237-1995 'Determination of Air Permeability of Textile Fabrics'. Factors affecting the breathability of masks: 1. Mask structure The material structure of masks, non-woven fabrics generally have a single-fiber network structure, good air permeability, and are more commonly used. For textile fabrics, the gap between the yarns is closely related to the air permeability of the fabric. The larger the gap, the better the air permeability. For example, gauze masks with larger gaps are more breathable than poplin and twill fabrics with tight structures. In general, knitted masks are more breathable than woven masks. The number of layers used in the mask material. In general, the more layers of masks, the poorer the breathability. For example, adding one or more layers of non-woven fabrics with particle filtering effect between two layers of spunbond non-woven fabrics or two layers of knitted woven fabrics will significantly reduce the air permeability. 2. When wearing a mask and the face is not well sealed, there will be gaps, and the airflow resistance of the gap is much smaller than that of the filter material, and the airflow will preferentially pass through the place with low air resistance. At this time, the wearer feels that the air permeability is good, but this At the same time, the protective effect of masks is greatly reduced. Therefore, when wearing a mask, it is still necessary to choose a mask that is suitable for your face size, and make full use of the adjustment functions such as nose clips and mask straps to ensure that the mask fits closely with the face, so that wearing it can achieve a good protective effect. 3. Filtration efficiency The breathability of masks has a certain correlation with the filtration efficiency of masks. When the ventilation of the mask is poor, the mask blocks the entry of foreign substances into the mask, the filtration efficiency is increased, but the wearing comfort is reduced.
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The air permeability tester is a high-precision testing instrument designed to evaluate the breathability of PPE materials, textile fabrics, non-woven fabrics, woven fabrics, and industrial filter media. It plays a critical role in quality control, product development, and laboratory research across multiple industries including PPE, textiles, automotive interiors, and filtration systems.
Modern instruments such as the GT-C27 Air Permeability Tester are developed with advanced sensor systems, automated control logic, and multi-standard compatibility to ensure reliable and repeatable results. Complying with global standards such as ISO 9237, ASTM D737, DIN 53887, and GB/T 5453, it guarantees internationally recognized testing performance.
With high automation, accurate pressure sensing, and flexible unit conversion systems, air permeability testing equipment significantly improves testing efficiency while reducing human error. It is widely used in PPE manufacturing, textile engineering, non-woven product development, and industrial filtration quality inspection.
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.
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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