BS EN ISO 9073-15-2008 Textiles Test methods for nonwovens Determination of air permeability《纺织物 非纺织品的试验方法 透气率的测定》.pdf

1、BRITISH STANDARDBS EN ISO 9073-15:2008Textiles Test methods for nonwovens Part 15: Determination of air permeabilityICS 59.080.30g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51

2、g60g53g44g42g43g55g3g47g36g58BS EN ISO 9073-15:2008This British Standard was published under the authority of the Standards Policy and Strategy Committee on 30 June 2008 BSI 2008ISBN 978 0 580 56794 0National forewordThis British Standard is the UK implementation of EN ISO 9073-15:2008. It is identi

3、cal to ISO 9073-15:2007.The UK participation in its preparation was entrusted to Technical Committee TCI/24, Physical testing of textiles.A list of organizations represented on this committee can be obtained on request to its secretary.This publication does not purport to include all the necessary p

4、rovisions of a contract. Users are responsible for its correct application.Compliance with a British Standard cannot confer immunity from legal obligations.Amendments/corrigenda issued since publicationDate CommentsEUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN ISO 9073-15May 2008ICS 59.080.30Eng

5、lish VersionTextiles - Test methods for nonwovens - Part 15: Determinationof air permeability (ISO 9073-15:2007)Textiles - Mthodes dessai pour nontisss - Partie 15:Dtermination de la permabilit lair (ISO 9073-15:2007)Textilien - Prfverfahren fr Vliesstoffe - Teil 15: Bewertungder Luftdurchlssigkeit

6、(ISO 9073-15:2007)This European Standard was approved by CEN on 12 April 2008.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibli

7、ographical references concerning such nationalstandards may be obtained on application to the CEN Management Centre or to any CEN member.This European Standard exists in three official versions (English, French, German). A version in any other language made by translationunder the responsibility of

8、a CEN member into its own language and notified to the CEN Management Centre has the same status as theofficial versions.CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,France, Germany, Greece, Hungary, Iceland, Ireland,

9、Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGManagement Centre: rue de Stassart, 36 B-105

10、0 Brussels 2008 CEN All rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN ISO 9073-15:2008: EForeword The text of ISO 9073-15:2007 has been prepared by Technical Committee ISO/TC 38 “Textiles” of the International Organization for Standardizat

11、ion (ISO) and has been taken over as EN ISO 9073-15:2008 by Technical Committee CEN/TC 248 “Textiles and textile products” the secretariat of which is held by BSI. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, a

12、t the latest by November 2008, and conflicting national standards shall be withdrawn at the latest by November 2008. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying

13、any or all such patent rights. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hun

14、gary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. Endorsement notice The text of ISO 9073-15:2007 has been approved by CEN as a EN ISO 9073-15:2008 without any mo

15、dification. BS EN ISO 9073-15:20081Textiles Test methods for nonwovens Part 15: Determination of air permeability 1 Scope This part of ISO 9073 specifies a method of measuring the flow of air passing perpendicularly through a given area of a fabric. This test method applies to most nonwovens, such a

16、s laminates, which are treated or untreated. They may have either a low- or high-basis weight. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest ed

17、ition of the referenced document (including any amendments) applies. ISO 139, Textiles Standard atmospheres for conditioning and/or testing ISO 186, Paper and board Sampling to determine average quality ISO 10012:2003, Measurement management systems Requirements for measurement processes and measuri

18、ng equipment 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 air permeability velocity of an air flow passing perpendicularly through a test specimen under a prescribed air pressure differential over a certain time period NOTE Air permeabilit

19、y is expressed in litres per square centimetre per second (l/cm2s), or any other equivalent unit. 4 Principle The flow of air passing perpendicularly through a given area of fabric is measured at a given pressure difference across the fabric test area over a given period of time. BS EN ISO 9073-15:2

20、0082 5 Apparatus 5.1 Test head, which provides a circular test area of either 20 cm2, 38,3 cm2or 50 cm2. The tolerance on the test heads or test areas shall not exceed 0,5 %. 5.2 Clamping system, to secure test specimens, capable of holding the specimen tight enough to the test head without distorti

21、on, and ensuring the absence of edge leakage beneath the test specimen. 5.3 Vacuum pump, for drawing a steady flow of air perpendicularly through the test area and for adjusting the airflow rate that preferably provides pressure differentials of between 100 Pa and 2 500 Pa (10 mm and 250 mm of water

22、) between the two surfaces of the specimen. The test apparatus should be capable of providing a pressure drop of either 100 Pa, 125 Pa or 200 Pa across the specimen. 5.4 Pressure sensors or manometer, connected to the test head underneath the test specimen, to measure the pressure drop across the te

23、st specimen in pascals or millimetres of water with an accuracy of 2 %. 5.5 Flowmeter or variable orifice, which can measure air velocity through the test area, in l/cm2sor other equivalent units of measure. The tolerance shall not exceed 2 %. Whatever unit of measure is used, it should be agreed up

24、on by all parties and included in the test report. 5.6 Calibration plate, or other means, made of durable material with a known preset air permeability number at the specified test pressure differential to verify the test equipment. 5.7 Means of calculating and displaying the required results. 5.8 C

25、utting dies or templates, to cut specimens to dimensions of 100 mm by 100 mm. Some types of equipment are constructed to allow testing of large pieces of nonwovens. 6 Procedure 6.1 Sample in accordance with ISO 186 and, unless otherwise specified, use 5 as the minimum specimen size. 6.2 Bring the sp

26、ecimens from the prevailing atmosphere to moisture equilibrium for testing in the standard atmosphere, as specified in ISO 139. 6.3 Cut five square specimens of 100 mm by 100 mm, if the apparatus is unable to handle large specimens. 6.4 Handle the test specimens carefully at the edges, to avoid chan

27、ging the natural state of the test area of the nonwoven material. 6.5 Metrological confirmation of the test apparatus shall be in compliance with Clause 7, Figure 2 and Annex A of ISO 10012:2003. This instrument should be able to be calibrated and supplied with a fact sheet indicating that it meets

28、ISO certification. This calibration certificate should be maintained in accordance with the manufacturers specifications. 6.6 Place each test specimen on the test head of the test instrument, and seal the ring with adequate tension to prevent distortion or side leakage while the test is being perfor

29、med. 6.7 Place coated test specimens with the coated side down (towards the low-pressure side) to minimize edge leakage. 6.8 Start the suction device. BS EN ISO 9073-15:200836.9 Regulate the flow of air until the desired pressure drop, 100 Pa, 125 Pa or 200 Pa, is attained. On some of the newer mach

30、ines, the test pressure is digitally preselected in accordance with the test standard, and the pressure drop across the variable orifice is digitally displayed in the selected unit of measurements for a direct reading. 6.10 If a manometer is used, wait until the desired depression has stabilized. Th

31、en read on the graduated scale the air permeability, expressed in litres per square centimetre per second (l/cm2s). These measurement units can be converted to other compatible units that are agreeable to all parties. When handling fabrics that are very open or very dense, another pressure different

32、ial, other than the standard, may be required. This alternative pressure differential should be reported. 7 Calculation Calculate the arithmetic mean of individual readings directly from the test instrument, and calculate the coefficient of variation to the nearest 0,1 %. Relate the readings to the

33、area of the test head. The airflow should be expressed in litres per square centimetre per second (l/cm2s) or any equivalent unit. The individual specimens readings should be rounded to three significant digits. If there are questions relating to different testing apparatuses and how to arrive at th

34、eir calculations, follow the manufacturers instructions, as applicable. NOTE For air permeability results obtained above 2 000 m above sea level, a correction factor may be required if the testing apparatus does not make these corrections. 8 Test report The test report shall include all information

35、needed to duplicate the test procedure and its results, in particular: arithmetic mean of individual readings; coefficient of variation; type or designation of material tested; number of test pieces tested; testing conditions; testing surface area used; pressure drop used; any deviation from the sta

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