\u63cf\u8ff0
\nSummary:
\nAir permeability is an important factor in the performance of such textile materials as gas filters, fabrics for air bags, clothing, mosquito netting, parachutes, sails, tentage, and vacuum cleaners. In filtration, for example, efficiency is directly related to air permeability. Air permeability also can be used to provide an indication of the breathability of weather-resistant and rainproof fabrics, or of coated fabric in general, and
\nto detect changes during the manufacturing process. In specialty, industrial and military applications, it can play a vital role in protection. In every market, satisfying the demands of consumers and producers requires ways to accurately and repeatably test material air flow.
\nUsage:
\nTo determine the resistance of fabrics (woven, knitted and non-woven textile materials) to the passage of
\nair (air flow) under constant pre-set air pressure while firmly clamped in the test rig of selected test head\/area.
\nStandard:
\nASTM D737 Standard Test Method for Air Permeability of Textile Fabrics
\nISO 9237 Textiles \u2013 Determination of the Permeability of Fabrics to Air
\nBS 5636, DIN 53887, AFNOR G07-111, EDANA 140.1, ISO 7231, ISO 9073-15, JIS L1096-A
\nTAPPI T251, WSP 070.1.R3, EDANA 140.2-99
\nFeatures:
\nWide measuring range of 0.1-12,000 l\/m\u00b2\/s at 20 cm\u00b2 test area.
\nWide test pressure range of 1-4,000 Pa.
\nFor filter media: Determination of the pressure drop at a given air velocity.
\nAutomatic control of the test pressure.
\nFast and simple sample clamping(Pneumatic Clamping Assembly).
\nTouch control panel for digital display of the test result.
\nQuiet and mobile instrument, perfectly suitable for use in the laboratory and in the production area.
\nData ports: RS 232. Ethernet for direct network access.
\nIntegrated software for evaluation and storage of the test results in office format.
\nCan be connected to a PC with the Evaluation Program SBT461 Air Permeability Tester lab-cloud.
\nWorks in accordance with all major test standards.
\nSpecifications:
\nMeasuring range
\n0.1-12,000 mm\/s at 20 cm\u00b2 test area.
\nUnits of measure
\nmm\/s, ft\u00b3\/ft\u00b2\/min, cm\u00b3\/cm\u00b2\/s, l\/m\u00b2\/s, l\/dm\u00b2\/min, m\u00b3\/m\u00b2\/min, m\u00b3\/m\u00b2\/h, dm\u00b3\/s
\nPa (pressure drop)
\nMeasuring accuracy
\nbetter than \u00b1 2 % of the displayed value.
\nTest pressure
\n1-4,000 Pa
\nTest areas
\n5, 20, 25, 38.5, 50, 100 cm\u00b2
\nSample thickness
\n< 12mm\nDimensions\n1070 x 670 x 1080 mm\nPower supply\n220V, 50Hz or 110V, 60Hz\nWeight\n75kg\nTest Procedure:\n1.Test the conditioned specimens in the standard atmosphere for testing textiles, which is 21 \u00b1 1\u00b0C (70 \u00b1 2\u00b0F) and 65 \u00b1 2 % relative humidity, unless otherwise specified in a material specification or contract order.\nHandle the test specimens carefully to avoid altering the natural state of the material.\nPlace each test specimen onto the test head of the test instrument, and perform the test as specified in the manufacturer\u2019s operating instructions.\nPlace coated test specimens with the coated side down (towards low pressure side) to minimize edge leakage.\nMake 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).\n6.Read and record the individual test results in SI units as cm\u00b3\/s\/cm\u00b2 and in inch-pound units as ft\u00b3\/min\/ft\u00b2 rounded to three significant digits.\n<\/p>\n","protected":false},"excerpt":{"rendered":"
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