Automatic fabric breathability tester

Introduction of fabric breathability tester

Fabric breathability tester is one of the gas transmittance tester family, which is applicable to the breathability of various textiles including industrial fabrics, nonwovens and other breathable products such as sponges. And the paper and so on high breathable material inspection.

Basic information is applicable to many kinds of textile fabrics, including industrial fabrics, nonwovens and other textile products and other breathable materials.

Project JIS L 1096astm737-04astm737-96gb /T 5453BS EN ISO 9237

Test head 5cm25cm2±0.5%5cm2±0.3%5cm2±0.3%5cm2±0.5%5cm2 ±0.5%

20 cm220cm2 plus or minus 0.5% to 6.45 cm2 + 0.3% to 6.45 cm2 + 0.3% 20 cm2 plus or minus 0.5% 20 cm2 plus or minus 0.5%

25 cm2 / / / / /

38 cm2 / cm2 38.3 + / - 38.3 cm2 + 0.3% / 0.3% /

50 cm250cm2 + 0.5% / cm2 50 + / cm2 50 + 0.5% to 0.5%

100 cm2100cm2 plus or minus 0.5% to 100 cm2 + 0.3% to 100 cm2 + 0.3% to 100 cm2 + 0.5% 100 cm2 plus or minus 0.5%

Gasket test head / 55TypeA neoprene gripper ring 3mm thick rubber sheets 2.5mm thick 65 irhd to 70IRHD rubber 1mm to 2mm thick

5 cm2

20 cm2

25 cm2

38 cm2

50 cm2

100 cm2

Application industry

Widely used in food and medicine

Instrument characteristics

1. The instrument is equipped with temperature control function, which can simulate the condition of the product in the actual environment and meet various requirements of material permeability test within the temperature range.

2. With unique fitting function, it can measure and evaluate the permeability, permeability coefficient, solubility coefficient and diffusion coefficient of materials at -273℃~+200℃ under special application conditions such as high and low temperature. 3. Computer control and automatic test

4. Determine transmittance, solubility, diffusion and permeability coefficient

5. Two judgment modes of test process: proportion and fuzzy

6, can be expanded toxic, explosive and other dangerous gas test

7. The measuring range can be extended by software setting

8. Rapid calibration of standard film

9. Network transmission interface supports LAN data centralized management and Internet information transmission

Application industry

Widely used in food, medicine, packaging, plastic, industry, electronics, energy and other industries, applicable to plastic film, composite membrane, paper-plastic composite packaging, solar backplane, sheet, composite materials, aluminum plating film, co-extrusion film such as film, aluminum foil, sheet material and plastic, rubber, paper, glass, metal materials such as bottles, bags, cans, boxes and other packaging container.

The test principle of

Place with good sample in advance between the up and down test chamber, clamping, first of all to vacuum the low pressure cavity (inferior vena), then the entire system of pumping air into vacuum state, when reach the specified vacuum, close test inferior vena, to the high pressure cavity (cavity) filling the test gas pressure, and ensure the form of a constant pressure difference on both sides of the sample (adjustable), gas will be under the function of differential pressure gradient, is composed of high voltage low voltage side of lateral seepage, through the process in the low voltage side pressure monitoring, thus it is concluded that the test sample of the barrier property parameters.

Execution standard

Determination of air permeability of textile fabrics

GB/T5453, GB/T13764, ASTM D737, ISO 9237, ISO 5636

Using the environment

1. The instrument should be placed on a flat and stable platform (or foundation).

2. No strong magnetic field or vibration source around the instrument.

3, indoor atmosphere without corrosive medium, no large particle dust, stable airflow.

4. Environment: temperature: 20±3℃, humidity: RH :≤65%

5. The power supply is Ac220V±10V and 50Hz with good grounding. For areas with large fluctuation of external power supply, it is recommended to use the power regulator (AC220±1% 2kw).

debugging

1. The instrument should be leveled before working. The specific operation is to rotate the adjustable foot to make the instrument level.

2. Check whether the fixed value ring of the sample is tightened and whether the air tightness ring is close to the two bonding surfaces.

3, check whether the head can control the head up and down flexibly.

4. Check whether the suction hose and flow cylinder are tightly connected with the suction fan.

5, check the flow cylinder on the door cover and lock can be closed.

6. Check whether the printer is online correctly.

7, correction,

8. Check whether the instrument leaks: replace the calibration plate with a non-porous plate for testing. The value displayed on the breathability rate screen is 0(less than 10Pa is allowed to beat), which means no leaks.

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1. Prepare the sample as required and cut it to the specified size.

2. Select the sample setting ring and install it on the instrument.

3. Select nozzle.

4. Switch on the power of the instrument.

5. Parameter setting.

6. Press the start button to start the instrument.

7. The instrument will automatically press the sample and start the test. When the pressure difference reaches the set point, the sample will be released automatically, and the instrument will automatically convert the test result and stop.

8. Conduct the test of the next sample until the effective test number reaches the requirement (the current number of tests on the display screen) and conduct data processing according to GB/T 5453-97.

9. Test results can be observed on the breathable volume/pressure difference display screen or printed.

10. After the test, turn off the power supply, clean the instrument and all accessories, remove the fixed value ring and put it into the spare parts drawer.

Matters needing attention

1. The instrument is of high precision equipment. Collision and severe turbulence are strictly prohibited in the process of moving and transporting.

2. The instrument is relatively accurate when leaving the factory, and non-professionals are not allowed to repair the internal parts of the instrument.

3. Instrument accessories (nozzle, nozzle seat and orifice plate, sample setting ring) are directly related to the test accuracy, and it is not allowed to wipe directly with cloth. If there is any contamination, dust on the surface shall be blown by ear ball.

4. Do not touch the sample during the test to avoid affecting the breathability of the sample.

5. The selection of nozzle diameter should be based on the breathability of the sample. For the sample whose breathability is not clear, it is necessary to conduct several tests to make it more accurate to reflect the breathability of the sample.

6. The filter screen in the air flow measuring cylinder shall be cleaned regularly according to the use frequency.

7. If the instrument is tested for a long time, the pressure difference value is not stable and the noise of the fan is too large continuously, stop the machine to check the air tightness of each component or whether the selected test parts are within the range.

8. For samples of different thickness, the position of the sample head should be adjusted to make it better compact the samples.

9. The instrument test is related to atmospheric pressure of air. It is suggested to check the instrument every working day.

10. There is a precision sensor in the air flow measuring cylinder. When replacing the nozzle and cleaning, the movement should be gentle to avoid accidents.

11. The air tightness of each sealing joint directly affects the test accuracy, and should be carefully stained, deformed and damaged.

12. Select nozzle number: it is recommended to make the dynamic pressure difference between 600 and 3000Pa to obtain more stable test results.

Fabric breathable property tester [scope of application] : fabric breathable property tester [performance characteristics] :

Fabric breathability tester [technical parameters] :

1. Pressure range: 1 ~ 4000Pa self-setting pressure drop

2. Measurable permeability: 0.2 ~ 12000mm/s

3. Measurement error: ≤±2%

4. Measurable fabric thickness :≤12mm

5. Air suction adjustment: dynamic adjustment with data feedback

6. Fixed value circle of sample area: 5cm2; 20 cm2; 50 cm2; 100 cm2. four

7, specimen diameter circle of fixed value: Ф 50 mm (19.6 cm2 material) Ф 70 mm (38.5 cm2 material)

8. Nozzle: 11 in total (automatic replacement with digital setting)

9. Data processing capacity: ≤5000 times

10 data output: Chinese liquid crystal display; A4 Chinese printing; Computer interface

11 power source: AC 220V±10V 50Hz

12 power consumption: 2000W

Weight: 100Kg

14 appearance: 700×1000×1000mm(L×W×H)

Fabric breathability tester [product features] :

I. application scope of fabric breathability tester:

Similar products are tested according to the old national standard (1985), which is only suitable for general fabrics. Its application scope has a great limitation: it cannot meet the requirements of the new national standard gb5453-1997

The product performance of our factory fully meets the requirements of gb5453-1997 standard and gives consideration to many standards such as iso9237-1995 (E). It is suitable for a variety of textile fabrics, including industrial fabrics, non-fabric breathability tester weaving fabrics, coated fabrics and other breathable leather, plastics, industrial paper and other chemical products

Ii. Working principle of fabric breathability tester:

Similar products manually adjust the air intake, manually read the height of water column, table lookup calculation, the error is large, does not meet the new standards.

The pressure difference set by feedback adjustment of products in our factory is measured by high-precision electronic pressure sensor on both sides of samples, and the ventilation rate and amount are calculated by computer. The processing data are measured by high-sensitive electronic flowmeter one by one and read into computer storage to ensure the accuracy of instrument testing

Fabric breathability tester, test accuracy and measurement range:

The measuring range of similar products is 25mmH2O(water column); 400 mmh2o two gears; Force measurement accuracy is generally ±2mmH2O%; Its comprehensive test accuracy has not been able to adapt to the increasingly strict and diverse testing work. The force measurement accuracy is :±1Pa(≈ 0.1mmh2o), which can meet the testing requirements of various samples

Iv. Structure:

Similar product its wooden structure appearance is clumsy, extremely easy to damage

My factory product USES the human body engineering design, the plastic steel whole punching forms the table structure, the appearance is beautiful, is concise; Easy to move and durable