What's the principle of the air permeability tester?

The Air permeability tester is part of a family of gas permeability testers for a wide range of textiles including technical fabrics, non-wovens and other breathable products such as sponges. It is also suitable for testing highly breathable materials such as paper. Basic information Suitable for measuring the air permeability of a wide range of textile fabrics, including technical fabrics, non-wovens and other breathable products and other breathable materials.

 

Air permeability tester features.

1、The instrument comes with a temperature control function, through the temperature control can simulate the condition of the product in the actual environment, can meet the temperature range of the material breathability test a variety of requirements.

2, unique fitting function, can -273 ℃ ~ +200 ℃ material air permeability, air permeability coefficient, solubility coefficient and diffusion coefficient, to meet the plastic film in high, low temperature and other special application conditions of air permeability testing and evaluation.

3、Computer controlled, fully automatic test

4、Determination of permeability, solubility, diffusion and permeation coefficients

5、Proportional and fuzzy test process judgment modes

6、The test can be extended for toxic, explosive and other dangerous gases

7、The measuring range can be extended by software setting

8、Quick calibration of standard membrane

9、The network transmission interface supports the centralized management of LAN data and Internet information transmission

Air permeability tester application industries.

Widely used in food, pharmaceutical, packaging, plastic, industrial, electronic, energy and other industries, for plastic film, composite film, paper-plastic composite packaging, solar backing, sheet, composite materials, aluminized film, co-extruded film and other film, foil, sheet materials and plastic, rubber, paper, glass, metal and other materials such as bottles, bags, cans, boxes and other packaging containers.

 

Testing principle.

The pre-treated specimen is placed between the upper and lower test chambers, clamped, firstly the low pressure chamber (lower chamber) is vacuumed, then the whole system is evacuated, when the specified vacuum is reached, the lower chamber is closed and the high pressure chamber (upper chamber) is filled with a certain pressure of test gas, and a constant pressure difference (adjustable) is ensured to be formed on both sides of the specimen, so that the gas will, under the action of the pressure difference gradient, penetrate from the high pressure By monitoring the pressure in the low pressure side, the barrier parameters of the tested sample are obtained.

 

The air permeability tester is used in the following environment.

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

2、No strong magnetic field and no vibration source around the instrument.

3、The indoor atmosphere should be free of corrosive media, no large particles of dust and stable airflow.

4、Environment :Temperature 20±3℃ Humidity RH :≤65%

5、Using power supply Ac220V±10V, 50Hz, good grounding, for external power fluctuation areas, it is recommended to use power regulator (AC220±1% 2kw).

 

Air permeability tester commissioning process.

1, the instrument should be leveled before work, the specific operation is to rotate the adjustable machine foot to make the instrument level.

2、Check whether the sample fixing ring is screwed tightly and whether the airtight ring is tight against the two combined surfaces.

3、Check whether the pressure head can be controlled to be flexible up and down.

4、Check whether the connection between the suction hose and the flow barrel and the suction fan is tight.

5、Check whether the door cover and the door lock on the flow barrel can be covered tightly.

6、Check whether the printer is correctly connected.

7、Calibration

8、Check whether the instrument is leaking air: use the non-porous plate instead of the calibration plate for testing, the air permeability screen shows a value of 0 (allowing a jump of 10 Pa or less) for no air leakage, otherwise a part of the instrument leaks air and should be checked and adjusted.