DIN EN ISO 11092-2014 Textiles - Physiological effects - Measurement of thermal and water-vapour resistance under steady-state conditions (sweating guarded-hotplate test) (ISO 1109.pdf

1、December 2014Translation by DIN-Sprachendienst.English price group 12No part of this translation may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).IC

2、S 59.080.01!%hj“2276971www.din.deDDIN EN ISO 11092Textiles Physiological effects Measurement of thermal and water-vapour resistance understeady-state conditions (sweating guarded-hotplate test)(ISO 11092:2014);English version EN ISO 11092:2014,English translation of DIN EN ISO 11092:2014-12Textilien

3、 Physiologische Wirkungen Messung des Wrme- und Wasserdampfdurchgangswiderstands unter stationrenBedingungen (sweating guarded-hotplate test) (ISO 11092:2014);Englische Fassung EN ISO 11092:2014,Englische bersetzung von DIN EN ISO 11092:2014-12Textiles Effets physiologiques Mesurage de la rsistance

4、thermique et de la rsistance la vapeur deau en rgimestationnaire (essai de la plaque chaude garde transpirante) (ISO 11092:2014);Version anglaise EN ISO 11092:2014,Traduction anglaise de DIN EN ISO 11092:2014-12SupersedesDIN EN 31092:2013-09www.beuth.deIn case of doubt, the German-language original

5、shall be considered authoritative.Document comprises 21 pages12.14 DIN EN ISO 11092:2014-12 2 A comma is used as the decimal marker. National foreword This document (EN ISO 11092:2014) has been prepared by Technical Committee ISO/TC 38 “Textiles” in collaboration with Technical Committee CEN/TC 248

6、“Textiles and textile products” (Secretariat: BSI, United Kingdom). The responsible German body involved in its preparation was the DIN-Normenausschuss Materialprfung (DIN Standards Committee Materials Testing), Working Committee NA 062-05-45 AA Physiologische Prfung von Textilien. Amendments This s

7、tandard differs from DIN EN 31092:2013-09 as follows: a) the number of the standard has been changed to DIN EN ISO 11092:2014; b) the technical substance of the standard has not been changed; c) the standard has been editorially revised. Previous editions DIN EN 31092: 1994-02, 2013-01, 2013-09 EN I

8、SO 11092September 2014 ICS 59.080.01 Supersedes EN 31092:1993English Version Textiles - Physiological effects - Measurement of thermal and water-vapour resistance under steady-state conditions (sweating guarded-hotplate test) (ISO 11092:2014) Textiles - Effets physiologiques - Mesurage de la rsistan

9、ce thermique et de la rsistance la vapeur deau en rgime stationnaire (essai de la plaque chaude garde transpirante) (ISO 11092:2014) Textilien - Physiologische Wirkungen - Messung des Wrme- und Wasserdampfdurchgangswiderstands unter stationren Bedingungen (sweating guarded-hotplate test) (ISO 11092:

10、2014) This European Standard was approved by CEN on 18 July 2014. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical

11、references concerning such national standards may be obtained on application to the CEN-CENELEC 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 translation under the responsibility of

12、a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Mace

13、donia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2014 CEN

14、 All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 11092:2014 EEUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGEUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMContents Page Foreword .

15、3 Introduction . 4 1 Scope . 5 2 Terms and definitions 5 3 Symbols and units . 6 4 Principle 7 5 Apparatus 7 6 Test specimens 10 6.1 Materials 5 mm thick . 10 6.2 Materials 5 mm thick . 10 7 Test procedure . 11 7.1 Determination of apparatus constants 11 7.2 Assembly of test specimens on the measuri

16、ng unit 13 7.3 Measurement of thermal resistance Rct . 13 7.4 Measurement of water-vapour resistance Ret . 14 8 Precision of results 14 8.1 Repeatability . 14 8.2 Reproducibility . 14 9 Test report . 14 Annex A (normative) Mounting procedure for specimens containing loose filling materials or having

17、 uneven thickness 16 Annex B (normative) Determination of correction terms for heating power . 17 Annex C (informative) Guidance on test specimen assembly for materials prone to swelling . 18 2DIN EN ISO 11092:2014-12 EN ISO 11092:2014 (E) ForewordThis document (EN ISO 11092:2014) has been prepared

18、by Technical Committee ISO/TC 38 Textiles in collaboration with 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 endorsemen

19、t, at the latest by March 2015, and conflicting national standards shall be withdrawn at the latest by March 2015. 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 an

20、y or all such patent rights. This document supersedes EN 31092:1993. 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, Croatia, Cyprus, Czech Republic, Denmark,

21、 Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. Endorsement notice

22、 The text of ISO 11092:2014 has been approved by CEN as EN ISO 11092:2014 without any modification. 3“ ”DIN EN ISO 11092:2014-12EN ISO 11092:2014 (E)IntroductionThis International Standard is the first of a number of standard test methods in the field of clothing comfort.The physical properties of t

23、extile materials which contribute to physiological comfort involve a complex combination of heat and mass transfer. Each may occur separately or simultaneously. They are time-dependent, and may be considered in steady-state or transient conditions.Thermal resistance is the net result of the combinat

24、ion of radiant, conductive and convective heat transfer, and its value depends on the contribution of each to the total heat transfer. Although it is an intrinsic property of the textile material, its measured value may change through the conditions of test due to the interaction of parameters such

25、as radiant heat transfer with the surroundings.Several methods exist which may be used to measure heat and moisture properties of textiles, each of which is specific to one or the other and relies on certain assumptions for its interpretation.The sweating guarded-hotplate (often referred to as the “

26、skin model”) described in this International Standard is intended to simulate the heat and mass transfer processes which occur next to human skin. Measurements involving one or both processes may be carried out either separately or simultaneously using a variety of environmental conditions, involvin

27、g combinations of temperature, relative humidity, air speed, and in the liquid or gaseous phase. Hence transport properties measured with this apparatus can be made to simulate different wear and environmental situations in both transient and steady-states. In this International Standard only steady

28、-state conditions are selected.4DIN EN ISO 11092:2014-12 EN ISO 11092:2014 (E) 1 ScopeThis International Standard specifies methods for the measurement of the thermal resistance and water-vapour resistance, under steady-state conditions, of e.g. fabrics, films, coatings, foams and leather, including

29、 multilayer assemblies, for use in clothing, quilts, sleeping bags, upholstery and similar textile or textile-like products.The application of this measurement technique is restricted to a maximum thermal resistance and water-vapour resistance which depend on the dimensions and construction of the a

30、pparatus used (e.g. 2 m2K/W and 700 m2Pa/W respectively, for the minimum specifications of the equipment referred to in this International Standard).The test conditions used in this International Standard are not intended to represent specific comfort situations, and performance specifications in re

31、lation to physiological comfort are not stated.2 Terms and definitionsFor the purposes of this document, the following terms and definitions apply.2.1thermal resistanceRcttemperature difference between the two faces of a material divided by the resultant heat flux per unit area in the direction of t

32、he gradientNote 1 to entry: It is a quantity specific to textile materials or composites which determines the dry heat flux across a given area in response to a steady applied temperature gradient. The dry heat flux may consist of one or more conductive, convective and radiant components.Note 2 to e

33、ntry: Thermal resistance is expressed in square metres kelvin per watt.2.2water-vapour resistanceRetwater-vapour pressure difference between the two faces of a material divided by the resultant evaporative heat flux per unit area in the direction of the gradientNote 1 to entry: It is a quantity spec

34、ific to textile materials or composites which determines the “latent” evaporative heat flux across a given area in response to a steady applied water-vapour pressure gradient. The evaporative heat flux may consist of both diffusive and convective components.Note 2 to entry: Water-vapour resistance i

35、s expressed in square metres pascal per watt.2.3water-vapour permeability indeximtratio of thermal and water-vapour resistances in accordance with Formula (1):iSRRmtctet= (1)5DIN EN ISO 11092:2014-12EN ISO 11092:2014 (E)where S equals 60 Pa/KNote 1 to entry: The water-vapour permeability index is di

36、mensionless, and has values between 0 and 1. A value of 0 implies that the material is water-vapour impermeable, that is, it has infinite water-vapour resistance, and a material with a value of 1 has both the thermal resistance and water-vapour resistance of an air layer of the same thickness.2.4wat

37、er-vapour permeabilityWdcharacteristic of a textile material or composite depending on water-vapour resistance and temperature in accordance with Formula (2):WRTdet m=1(2)where Tmis the latent heat of vaporization of water at the temperature Tmof the measuring unit, equals, for example, 0,672 Wh/g a

38、t Tm= 35 CNote 1 to entry: Water-vapour permeability is expressed in grams per square metre hour pascal.3 Symbols and unitsRctis the thermal resistance, in square metres kelvin per wattRetis the water-vapour resistance, in square metres pascal per wattimtis the water-vapour permeability index, dimen

39、sionlessRct0is the apparatus constant, in square metres kelvin per watt, for the measurement of thermal resistance RctRet0is the apparatus constant, in square metres pascal per watt, for the measurement of water vapour resistance RetWdis the water-vapour permeability, in grams per square meter hour

40、pascalTmis the latent heat of vaporization of water at the temperature Tm, in watt hours per gramA is the area of the measuring unit, in square metresTais the air temperature in the test enclosure, in degrees CelsiusTmis the temperature of the measuring unit, in degrees CelsiusTsis the temperature o

41、f the thermal guard, in degrees Celsiuspais the water-vapour partial pressure, in pascals, of the air in the test enclosure at tem-perature Tapmis the saturation water-vapour partial pressure, in pascals, at the surface of the measur-ing unit at temperature Tmvais the speed of air above the surface

42、of the test specimen, in metres per secondSvis the standard deviation of air speed v, in metres per secondR.H. is the relative humidity, in percentH is the heating power supplied to the measuring unit, in watts6DIN EN ISO 11092:2014-12 EN ISO 11092:2014 (E) Hcis the correction term for heating power

43、 for the measurement of thermal resistance RctHeis the correction term for heating power for the measurement of water-vapour resist-ance Ret is the slope of the correction line for the calculation of Hc is the slope of the correction line for the calculation of He4 PrincipleThe specimen to be tested

44、 is placed on an electrically heated plate with conditioned air ducted to flow across and parallel to its upper surface as specified in this International Standard.For the determination of thermal resistance, the heat flux through the test specimen is measured after steady-state conditions have been

45、 reached.The technique described in this International Standard enables the thermal resistance Rctof a material to be determined by subtracting the thermal resistance of the boundary air layer above the surface of the test apparatus from that of a test specimen plus boundary air layer, both measured

46、 under the same conditions.For the determination of water-vapour resistance, an electrically heated porous plate is covered by a water-vapour permeable but liquid-water impermeable membrane. Water fed to the heated plate evaporates and passes through the membrane as vapour, so that no liquid water c

47、ontacts the test specimen. With the test specimen placed on the membrane, the heat flux required to maintain a constant temperature at the plate is a measure of the rate of water evaporation, and from this the water-vapour resistance of the test specimen is determined.The technique described in this

48、 International Standard enables the water-vapour resistance Retof a material to be determined by subtracting the water-vapour resistance of the boundary air layer above the surface of the test apparatus from that of a test specimen plus boundary air layer, both measured under the same conditions.5 A

49、pparatus5.1 Measuring unit, with temperature and water supply control, consisting of a metal plate approximately 3 mm thick with a minimum area of 0,04 m2(e.g. a square with each side 200 mm in length, l) fixed to a conductive metal block containing an electrical heating element see Figure 1, items (1) and (6). For the measurement of water-vapour resistance, the metal plate (1) must be porous. It is surrounded by a thermal guard item (8) of Figure 2 whic