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Auto Air Permeability Tester TF164E

4.0 (8 reviews)

Auto Air Permeability Tester, is used to determine the air permeability of fabric totally automatically. With its wide measuring range, it is suitable for all kinds of knitted, woven, non-woven, coated fabrics, paper, film, leather, etc. 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).

Description

Auto Air Permeability Tester, is used to determine the air permeability of fabric totally automatically. With its wide measuring range, it is suitable for all kinds of knitted, woven, non-woven, coated fabrics, paper, film, leather, etc., air permeability tester also can be used to measure the differential pressure of air flow from two sides of breathability related products like face masks.

A test sample is placed on the clamping head; parameters of test are set on the Android based software on the Samsung pad connected with machine. By pressing down the upper clamping arm the system automatically starts, the system automatically adjusts machine and shift nozzles if required; after a few seconds the test results are then displayed and the excel report is generated, and the test results are displayed on the Samsung pad.

Specifications

  • Units can be shift: mm/s, cfm, cm³/cm2/s, l/m2/s, l/dm2/min, mm³/m2/min, m³/m2/h and dm³/s
  • Test Heads: 20 cm2
  • Test pressure: 10 ~ 2,500 Pa
  • Max thickness of specimen: 0 ~ 10 mm
  • Measuring accuracy: < ± 2%
  • Optional test heads:5 cm2, 25 cm2, 38 cm2, 50 cm2, 100 cm2
  • * For medical masks test: 25 mm / 4.9 cm2 test head
  • Power: 220 /110 V   50/60 Hz
  • Weight: 121 kg
  • Dimensions: 1000 x 450 x 1140 mm (L x W x H)

Standards

  • ASTM D737, ISO 9237

The Air Permeability Definition of Fabric

What is the permeability of air? Fabric permeability refers to the air permeability of fabric in the presence of pressure difference on both sides of the fabric, that is, the volume of air flowing through the fabric per unit and area per unit time under the specified pressure difference between the two sides of the fabric. Because pressure difference is a necessary condition for air flow, air flow in the fabric can only be produced by maintaining a certain pressure difference on both sides of the tested fabric.

The Importance of Fabric Permeability

Fabric permeability is an important factor affecting fabric comfort and service performance. For example, sportswear, cagoule and warm wear have higher requirements for fabric permeability, and some industrial textiles such as parachute and filter cloth have special requirements for fabric permeability. Only the fabric that conforming to the requirements of air permeability can meet the different needs of our life and production.

Testing Principle for Air Permeability

The sample is fixed to the test zone through the handle. By pressing the test head to begin the test, a strong aspirator pump begins to draw air through an interchangeable test head at a circular opening. After the preset test pressure is automatically started and maintained for a few seconds, the air permeability of the tested sample is displayed in a preset unit of measurement. Press the test head again for one second, the sample is released and the aspirator pump is closed.

Test standard for Air Permeability of Fabrics

The measurement of air permeability is based on the fixed pressure difference as the benchmark for the test. Because the pressure difference stipulated in the national test standards is not consistent, current the common test standards are the: ASTM D737, ISO 9237, GBT 5453, and JIS L1096. The test requirements for each method, test results and conversion between common air permeability units are shown below.

The Test Methods for Each Standard are Compared as Follows

compareISO 9237GB/T 5453ASTM D737JIS L1096
RangeIt is suitable for most fabrics, including technical textiles, nonwovens and other breathable textile products.It is suitable for most fabrics, including industrial fabrics, nonwovens and other breathable textile products.It is suitable for most fabrics, including knitted fabrics, non woven fabrics, blankets, suede fabrics, knitted fabrics, and other fabrics.It is applicable to many kinds of textiles, including industrial fabrics, nonwovens and other breathable textile products.
Sample requirementThe test position should avoid from the edges and creases.The test position should avoid from the edges and creases.The distance from the test area edge is not less than 1/10 of the width, and ensure that the sample is not crease.The test position should avoid from the edges and creases.
Sample test times1010105
Test conditionsThe temperature is (20±2)℃.
Relative humidity is (65±4) %
The temperature is (20±2)℃.
Relative humidity is (65±4) %
The temperature is (20±1)℃.
Relative humidity is (65±2) %
The temperature is (20±2)℃.
Relative humidity is (65±4) %
Test area (cm²) Standard recommendation: 20
Also selection: 5, 50, 100
Standard recommendation: 20
Also selection: 5, 50, 100
3820
Pressure difference (Pa)Standard recommendation
Use fabric: 100
Industrial fabric: 200
Also selection: 50, 500
Standard recommendation
Use fabric: 100
Industrial fabric: 200
Also selection: 50, 500
125125
Measurement unitmm/smm/scm³/s/cm² or
ft³/min/cm²
cm³/cm²/s

The Test Results of air permeability rating for the Different Standards are as Follows

SampleGB/T 5453, ISO 9237
Test area: 20 cm³
Pressure difference: 100 Pa
Measurement unit: mm/s
ASTM D 737
Test area: 38 cm³
Pressure difference: 125 Pa
Measurement unit: cm³/s/cm²
JIS L 1096
Test area: 20 cm³
Pressure difference: 125 Pa
Measurement unit: cm³/cm²/S
1#23.122.782.92
2#1.930.220.23
3#3.130.380.40
4#24.042.983.13
5#27.303.313.44
6#23.592.802.94
7#58.927.177.51
8#49.545.846.12
9#1.720.210.22
10#4.720.560.59

Common Conversion Table of Air Permeability Unit

unitmm/s=1/m²/scm³/s/cm²=cm³/cm²/scfmm³/m²/minm³/m²/h
1 mm/s=1.000.1000.1970.063.60
1 cm³/s/cm²10.01.001.970.6036.0
1 cfm=5.080.5081.000.30518.3
1 m³/m²/h=0.2780.02780.05470.01671.00

There are many standards for testing the air permeability of fabrics, and there are slight differences between the standards according to the size of the test area and the value of the differential pressure air permeability tester. The air permeability meter should carry out the test strictly in accordance with the regulations.

Conventional Operation Flow

  1. Prepare the samples as required and cut them into the required size.
  2. Check the calibration instrument.
  3. Turn on the power switch, enter the control interface to set the test parameters, and then enter the test interface.
  4. Place the specimen in the test area and clamp it on the test table. The test position should avoid from the edges and creases, and the specimen should be kept flat before clamping.
  5. Start the instrument and begin test automatically. The suction fan start and the air through the sample, when the pressure difference approaches the specified value the instrument will records the air flow automatically.
  6. Complete the test, press the test head, release the sample, and test the sample in different positions.
  7. Repeat the above operation to test a set of samples, after the test, query the results and display the test average.
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Q: What is air permeability definition?

A: The air permeability of a fabric is a measure of how well it allows the passage of air through it. The ease or otherwise of passage of air is of importance for a number of fabric end uses such as industrial filters, tents, sailcloths, parachutes, raincoat materials, shirtings, downproof fabrics and airbags.

Air permeability is defined as the volume of air in millilitres which is passed in one second through 10Os mm2 of the fabric at a pressure difference of 10mm head of water.

 

Q: What is air permeability test for fabric?

A: In the British Standard test the airflow through a given area of fabric is measured at a constant pressure drop across the fabric of 10mm head of water. The specimen is clamped over the air inlet of the apparatus with the use of rubber gaskets and air is sucked through it by means of a pump as shown in Fig.A. The air valve is adjusted to give a pressure drop across the fabric of 10mm head of water and the air flow is then measured using a flow meter.

air permeability test

Fig(A) : The air permeability test (click here for more)

 

Q: What is 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

 

Q: What is air permeability test procedure?

A: 1. Test the conditioned specimens in the standard atmosphere for testing textiles, which is 21 +/- 1°C (70 +/- 2°F) and 65 +/- 2 % relative humidity, unless otherwise specified in a material specification or contract order.

2. Handle the test specimens carefully to avoid altering the natural state of the material.
3. Place each test specimen onto the test head of the test instrument, and perform the test as specified in the manufacturer’s operating instructions.

3.1 Place coated test specimens with the coated side down (towards low pressure side) to minimize edge leakage.

 

4. Make tests at the water pressure differential specified in a material specification or contract order. In the absence of a material specification or contract order, use a water pressure differential of 125 Pa (12.7 mm or 0.5 in. of water).

 

5. Read and record the individual test results in SI units of permeability as cm^3/s/cm^2 and in inch-pound units of permeability as ft^3/min/ft^2 rounded to three significant digits.
5.1 For special applications, the total edge leakage underneath and through the test specimen may be measured in a separate test, with the test specimen covered by an airtight cover, and subtracted from the original test result to obtain the effective air permeability.

 

6. Remove the tested specimen and continue as directed in 10.3-10.5 until ten specimens have been tested for each laboratory sampling unit.
6.1 When a 95 % confidence level for results has been agreed upon in a material specification or contract order, fewer test specimens may be sufficient. In any event, the number of tests should be at least four.

 

 

8 reviews for Auto Air Permeability Tester TF164E

  1. Pitt L

    Fantastic machine, really good

  2. Gary

    我想购买一台Auto Air Permeability Tester TF164E,具体价格想咨询,或电话+86 18862653310

    • testextextile

      您好,我们的业务员会稍后联系您。

  3. Evan Samson

    It seems to work well so far. The only reason I didn’t give it a 5 star rating is because I haven’t really had it long and am not sure yet how it will hold up throughout time. But like I said, it’s been great so far.

  4. Edward Tyler

    Air Permeability Tester is good.will keep in touch.

  5. Ernest Leonard

    What’s difference between air permeability tester TF164B and Auto Air Permeability Tester TF164E??

    • testextextile

      Thanks for your question. Our technical staff have emailed you the answer.

  6. Todd

    The air permeability tester price is supper good.The seller gives me a accessory as additional donate. Good seller!!!

    • testextextile

      We’re glad our service satisfies you.

  7. Паша

    Замечаний нет. Очень тихий.. Рекомендую продавца.

    • testextextile

      Good client! Any question pls feel free to contact us. Welcome again!

  8. Armand Copperfield

    very speedy and good seller-very good products

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