Fabric Air Permeability Tester Textile Air Permeability Experiment

The ability of textiles to penetrate air is called air permeability. The air permeability of textiles directly affects the rapid dissipation of heat and water vapor released by the human body, thereby affecting the thermal and humid comfort of the human body. The fabric air permeability tester is used to test the air permeability of textiles. Qisnun Precision Mechanical and Electrical Technology Co., Ltd. is the manufacturer of experimental instruments. Customers in need are welcome to call us in time.

Reference standard:

GB/T5453-1997 \"Determination of air permeability of textile fabrics\"

Principle of the test:

Under specified pressure difference conditions, measure the air flow passing vertically through a given area of ​​the sample for a certain period of time , thus calculating the air permeability. The air flow can bemeasured directly or converted by measuring the pressure difference across the small opening.

Sample preparation:

(1) Prepare test samples according to the sample preparation and tissue sampling requirements in the Introduction;

(2) differences in the same sample Repeat the site measurement at least 10 times, and the sample does not need to be cut.

Test steps:

(1) Fix the sample on the round sample table, generally 20 cm2, clamp the sample and add a seal to prevent leakage. \'air.

(2) select the nozzle and install it into the air flow cylinder (after the new instrument selects the nozzle through the menu, the instrument will automatically replace the nozzle).

(3) Turn on the power and adjust the pressure drop to the specified value.

(4) Start the test. When the set pressure difference is reached, theThe instrument automatically stops, and the air permeability/pressure difference display automatically displays the air permeability (mm/s).

Test results:

Calculate the arithmetic calculation of air permeability, and round the result to 2% of the measuring range (full measuring range).

R=q,/A×167(8-9)

R=q,/A×0.167(8-10) where R——air permeability, Mm/ s (or m/s)q, - average air flow, L/min$A - test area, cm2167 - conversion factor from Mliminxcm2 to mm/s 0.167 - conversion factor from L/minxcm2 to m /s. Among them, formula (8-10) is mainly used for sparse structure fabrics, non-woven fabrics and other high W ratio fabrics.

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