Air Permeability Tester TF164
Auto Air Permeability Tester, is used to determine the air permeability of fabric totally automatically. With its wide measuring range, the air permeability tester is suitable for all kinds of knitted, woven, non-woven, and coated fabrics, paper, film, leather, etc. Air Permeability Tester complies with GB/T5453, ISO 9237, ISO 9073:15 and etc. Air permeability test equipment can also be used as the medical mask breathability tester, by measuring the differential pressure required to draw air through a measured surface area at a constant airflow rate, to test the air exchange pressure of the medical face mask material, which indicates the breathability performance of medical face masks(under improving, soon will be finished). We offer a competitive air permeability tester price, please feel free to contact us if you are interested.
|Test Heads: 20 cm², (optional: 5 cm², 25 cm², 38 cm², 50 cm², 100 cm²)|
|Test pressure: 10 ~ 2,500 Pa|
|Specimen thickness: 0 ~ 10 mm|
|Accuracy: < ± 2%|
|Calibration plate: 20cm², 200Pa Air permeability 296 l/m²/s|
|Units: mm/s, cfm, cm³/cm²/s, l/m²/s, l/dm²/min, mm³/m²/min, m³/m²/h and dm³/s|
|Standards||ISO 9237, ISO 9073:15, GB/T 5453, (optional: ASTM D737)|
|Power||220/110 V 50/60 Hz|
|Dimensions||400 mm * 920 mm * 990 mm|
TESTEX – a professional textile testing instrument supplier – Air Permeability Tester TF164 is on sale, contact us to get a detailed price quote.
What is the air permeability tester?
Auto Air Permeability Tester, also named air permeability tester, tests the air permeability of fabric totally automatically. Moreover, the tester can test a wide range of fabrics, such as various knitted, woven, non-woven, and coated fabrics, paper, film, and leather. Besides, the air Permeability Tester complies with GB/T5453, ISO 9237, ISO 9073:15 and etc.
Air permeability test equipment can also be used as the medical mask breathability tester. By measuring the differential pressure required to draw air through a measured surface area at a constant airflow rate, it can test the air exchange pressure of the medical face mask material, which indicates the breathability performance of medical face masks(under improvement, soon will be finished). In addition, we offer the appropriate test methods and favorable prices.
You can also learn about more commonly used textile testing machines.
How to test the air permeability of fabric?
Air permeability refers to the fabric through the performance of the air when both sides of the fabric of the existence of the pressure difference. That is, both sides of the fabric in the specified pressure difference, unit time flow through the fabric unit area of air volume, the unit is L/mm2s. Because the pressure difference is the necessary condition for the flow of air, only in the measured fabric on both sides to maintain a certain pressure difference, in order to produce airflow in the fabric.
Air permeability test method
Place a test sample on the clamping head, and set the parameters of the test on the Android-based software on the Samsung pad connected to the machine. Pressing the upper clamping arm starts the system automatically. The system automatically adjusts the machine and shifts nozzles if there is a requirement. After a few seconds, the Samsung pad will display the test results and make an excel report.
The rate of air flow passing perpendicularly through a known area of fabric is adjusted so as to obtain a prescribed air pressure differential between the two fabric surfaces. From this rate of airflow, the air permeability of the fabric is determined.
Features of air permeability tester TF164E
Easy to use
First set the air pressure on the software connected to the machine, put the test sample and then start the clamping/test with a single press. One press is to release the sample. And the panel displays the test result instantly after a few seconds. Finally, you will get an EXCEL report.
Wide range of application
A long and sturdy clamping arm covers the large test bench, which can accommodate large samples and is suitable for testing different materials and finished garments; at the same time, there are 5 optional test heads to meet different testing needs.
High-quality accessories for longer durability
Samsung PAD display, clear and intuitive, simple and practical keys. The medical-grade valves are to maintain the consistency of airflow and extend its service life. Besides, it can maintain the performance of the instrument.
Wide range of testable air pressure
The testable air pressure range of 10 ~ 2,500 Pa can meet the common fabric breathability testing requirements in the market.
Why choose TESTEX air permeability tester TF164E
Strictly meet standards
All data for the air permeability testing machine meet the standard parameters.
Consistency with international third-party laboratories
The test data are comparable to the test results obtained by well-known international third-party laboratories.
With the same set of samples, the same machine, and after multiple tests, the results are consistent.
After testing the same set of samples, or different machines of the same model multiple times, the results are consistent.
Longer service life
Before production, TESTEX air permeability testers are subjected to a strict reliability test. This means testing under challenging environments such as high and low temperature, high speed and high load, etc. It ensures an expected serving life of over 10 years.
User-friendly transparent warranty policy
Textile testing machines, 14 months free warranty (12 months normal warranty time + 2 months shipping time). And all spare parts, 3 months free warranty.
Frazier air permeability test method (ASTM D737 testing) of textiles
1. The definition of Air permeability
What is the permeability of air? Air permeability is the volume of air passing a fabric under pressure. There are two types of air permeability testers for textiles, the Frazier air permeability tester and the Shirley air permeability tester. In ASTM D737 test method, we take the Frazier differential pressure air permeability tester as an example.
2. Test Objectives:
To determine the air permeability of textile fabrics by calculating the air permeability value.
3. Test Materials:
Woven, knitted, and non-woven textile materials. eg. cotton.
4. Air Permeability Test Procedure:
4.1 The specimens must be adjusted to the standard atmosphere with 21 +/- 1°C (70 +/- 2°F) and 65 +/- 2 % relative humidity unless there is otherwise a specification of contract order.
4.2 Process the specimens carefully and prevent them from changing their natural state.
4.3 Place each specimen on the test head of the air permeability tester and control the test as per the operation manual.
4.4 At the conditioned water pressure, carry out tests according to the operation manual. In the absence of an operation manual, use water pressure of 125 Pa (12.7mm or 0.5 in. of water).
4.5 Read and record the test results. The air permeability units should be noted. Record the test results respectively in SI units as cm^3/s/cm^2 and in inch-pound units as ft^3/min/ft^2 rounded to three significant digits.
4.6 Take out the tested specimen and continue to test the next specimen until the ten specimens have been tested in accordance with the flow of 4.3-4.5.
4.7 In order to obtain a test result with high accuracy, the number of tests is at least four.
5. Air Permeability Calculation
Calculate the air permeability of every specimen by reading directly from the tester in SI units as cm^3/s/cm^2 and in inch-pound units as ft^3/min/ft^2, rounded to three significant digits. Please follow the instructions provided by the manufacturer when calculating air permeability.
Note-If air permeability test results are 600m (2000 ft) above the sea level, it needs correction factors.
The data which is needed to report is as follows.
6.1 Report whether the air permeability is in accordance with Test Method D737.
6.2 Report the standard deviation and the variation factor while calculating.
6.3 The difference in pressure of fabric surfaces.
6.4 Report the model and the manufacturer of the air permeability test equipment.
The breathability of fabrics
The breathability of fabrics directly affects their comfort attribute. If the breathability of the fabric is extremely insufficient, it will be difficult to discharge heat and moisture, making people feel stuffy and uncomfortable. The main factors affecting the breathability of fabrics are as follows: geometric characteristics of fibers, yarn special number, yarn twist, fabric density, fabric thickness, and processing methods. For example, natural and man-made fibers have good moisture absorption, water permeability, and air permeability, but poor breathability.
1 In the test, do not touch the specimen, avoiding the effect on the air permeability of the specimen.
2 During the moving and transportation processes, collision and violent bumping are strictly prohibited.
3 Select the nozzle diameter according to the breathability of the specimen. If the breathability of the specimen is not clear, it is necessary to conduct several tests to make it more responsive to the specimen's breathability.
4 For specimens of different thicknesses, the position of the specimen indenter should be adjusted so that it can better tighten the specimen.
5 Instrument testing is related to air atmospheric pressure. Therefore, it is recommended to conduct a calibration every working day, which should be carried out by special personnel.
6 There are precision sensing elements in the air flow cylinder. Thus, the nozzle should be replaced and cleaned gently to prevent accidents from happening.
7 The air tightness of each seal connection directly affects the testing accuracy. So we should stop it from staining, deformation, and breakage.
8 The instrument accessories, such as the nozzle, nozzle holder and orifice plate, and specimen fixing ring, are directly related to the test accuracy. Therefore, we should not wipe them directly with a rag. If they are stained, the surface dust should be blown by an ear ball.
What important points should be paid attention to when measuring air permeability?
1 Calibration board must be used before each test (all boards should be checked). Mainly air circuit, liquid circuit, air leakage, liquid leakage, and position moving will cause an error to the air permeability tester.
2 The sample should be fixed at the intake hole naturally and smoothly. Usually, it does not need to distinguish between positive and negative, but if the positive and negative differences of structures (such as umbrella cloth, filter cloth, pile fabric) are big, air flow direction should be decided according to the actual use.
3 The caliber is selected in order of large to small to avoid the excess of liquid in the pressure gauge. The final selected caliber should be under the indication range of 15%~85%.
4 Moderate pressure regulation makes the pressure gauge slowly change from low value to constant pressure value. If the liquid level has exceeded the constant pressure value, it must be adjusted back to a lower pressure level and re-adjusted. The pressure has to be stable for a period of time and then can be read.
5 Make sure that the end of the pressure gauge passes through the atmosphere without clogging. Some instruments have covers and should be taken down when measuring.
6 There is a nonlinear relationship between the air permeability and the differential pressure of two sides of the fabric (constant pressure value). The air permeability under differential pressure can be compared according to the following formula:
The air permeability under the same differential pressure is converted, Q_M and Q_N of which are the air permeability under the constant pressure value of ∆P_M and ∆P_N, and the B is determined by the fabric category and ∆P_N.
7 Different countries have different air permeability units of measurement. Therefore, please pay more attention to the air permeability unit conversion. If you need to convert 1/ dm^2/min to m^3/ m^2/ minor convert l/ dm^2/ min to l/ m^2/ s, here is the air permeability conversion chart as follows for your reference.
Please contact us if you want to know the air permeability tester price or download a free ASTM D737 test for permeability PDF.
A: The fabric air permeability is to measure the volumn of air flow through it. The ease or passage of air plays an important role in end uses of many fabrics, such as industrial filters, tents, sailcloths, parachutes, raincoat materials, shirtings, downproof fabrics and airbags.
Air permeability refers to the volume of air per ml which passes the fabric at a speed of 1s or 10s/mm^2 in a pressure difference of 10mm water head.
Q: How to test the air permeability of fabric?
A: In British standard test, the volume of airflow through a specified area is measured at a certain pressure across the fabric with 10mm water head. Test sample is clamped over the inlet of device with rubber gaskets, and air is sucked through it by pumps, which is shown in Fig.A. The air valve is adjusted to exert pressure on air going through fabric of 10mm water head, then a flow meter is used to measure airflow.
Fig(A) : The air permeability test (click here for more)
Q: What is the unit of air permeability of fabric?
A: The formula is as follows:
K (gas) = Q / (ΔP × A)
Where: K( gas) - air permeability, m ^ 3 / m ^ 2 · KPa · h;
Q - gas flow, m ^ 3 / h;
ΔP - gas through the porous material produced by the pressure drop, KPa;
A - area of the sample's test area, m ^ 2