What is the Use of Air Permeability Tester?Air permeability refers to a textile's ability to allow air to pass through its structure, Textile air permeability directly influences how efficiently heat and moisture vapor escape from the body. This significantly impacts thermal and humidity comfort for the wearer, The air permeability tester is an instrument designed to measure the air permeability of textiles, for measuring the permeability of textiles, garments, nonwovens, and many other materials.What is Air Permeability Testing?The ability of air to pass through a fabric is called the air permeability of fabric. It directly affects the performance of the fabric. Such as summer with the fabric hope to have good air permeability, winter with the outerwear fabric permeability should be small, to ensure that the clothes have a good windproof performance, to prevent a large amount of heat emitted. For defence and industrial use of certain fabrics, fabric permeability has a very important meaning, such as parachute cloth and canvas, etc. have certain standard requirements of permeability. Fabric air permeability is determined by the number and size of the gap between the warp and weft yarns in the fabric, i.e. with the warp and weft density, warp and weft yarn density number, yarn twist and other factors.A digital air permeability tester is a precision instrument used to measure the rate at which air passes through a given material under specific conditions. It quantifies airflow based on permeability, usually expressed as the amount of air that passes through a specific area of the material in a given time. The air permeability tester for fabric applies a controlled pressure differential across the material and measures the resulting airflow, providing valuable data for quality control, research and development purposes.How to Test for Air Permeability?The air permeability tester uses the principle of pressurised airflow to determine the permeability of materials. It consists of a test chamber, a clamping mechanism, a pressure source and a precision airflow measurement system. The material to be tested is firmly placed in the test chamber and a controlled differential pressure is applied to it. The resulting airflow is then measured using an advanced sensor and the data is processed to calculate the permeability value.Test Procedures for Textile Air Permeability TestingPrepartionTurn on. Connect to compressed air, the pressure is about 0.6Mpa.Standard Accessories Fixtures including 20cm² and 38.3cm² Testing Fixtures.Usually use 38.3cm² to do test."Locked the upper fixture on the holder;Connect the air supply tube to the designated port before proceeding.Setting parametersClick "SETTING", enter Setting Interface.Set test parameter: chose test nozzle(0-10), set test pressure and test time.Notes: Other parameters remain unchanged.Click "TEST_INF", enter Test Interface."Return to Test Interface, click "TURN N.", nozzle will switch to set number automatically. After this switching, the button will become to "TEST".Start TestPlace specimen, click "TEST""The progress bar is working. 2 results maybe happened: 1. If the progress bar exceeds 90% and there is not pressure displayed, means that this nozzle is not good. Please set bigger nozzle number.2. If it‘s less than 20%, please set smaller nozzle number.""Enter Setting Interface again, change the nozzle. Click ""TEST_INF"", return to Test Interface.Click ""TURN N."" again, switching the nozzle automatically.""The progress bar exceeds 90% again, Means that need bigger nozzle. Repeat the previous steps, change the nozzle to 6# and do test again.""Use 6# nozzle to do test. The progress bar is steady at around 46% Notes: 20-80% is normal for testing.Applications of Textile Air Permeability TestingKey industry applications include: Textile industry: Used to assess the air permeability of various textiles, such as fabrics, non-woven fabrics, etc.Clothing industry: for testing the air permeability of clothing fabrics to assess their comfort and functionality.Medical textiles: Air permeability has a significant impact on patient comfort and health, so medical textiles also need to be tested for air permeability.Automotive interiors: Automotive interior materials also need to be tested for air permeability to ensure passenger comfort and health.Factors to Consider When Choosing Air permeability TesterChoosing the right automatic air permeability tester is critical to obtaining accurate and reliable results. Several factors should be considered during the selection process, including the required measurement range, sample size compatibility, test speed, test standard compliance, ease of operation and data analysis capabilities. In addition, considering the specific needs of your industry and the digital air permeability tester's intended application will help you make an informed decision.Digital Air Permeability Tester Test StandardThere are quite a few standards and methods for fabric air permeability testing. Below is a list of commonly used standards and comparisons for fabric air permeability testing at home and abroad. These standards come from different countries or organisations, such as ISO, GB, BS, ASTM and so on. Each standard may be applicable to different types of materials or products, such as non-woven materials, textiles, etc.GESTER air permeability tester for fabric compliant with GB/T 5453, GB/T 13764, ISO 9237, ISO 7231, ISO 5636, BS 5636, ASTM D737, DIN 53887, JISL1096, AFNORG 07-111, edana 140.1, ISO 9073-15.
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