1、BSI Standards PublicationBS EN ISO 11092:2014Textiles Physiological effects Measurement of thermal and water-vapour resistance under steady-state conditions (sweating guarded-hotplate test) (ISO 11092:2014)BS EN ISO 11092:2014 BRITISH STANDARDNational forewordThis British Standard is the UK implemen
2、tation ofEN ISO 11092:2014. It supersedes BS EN 31092:1993+A1:2012 which is withdrawn.The UK participation in its preparation was entrusted to Technical Committee TCI/24, Physical testing of textiles.A list of organizations represented on this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.Th
3、is publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. The British Standards Institution 2014.Published by BSI Standards Limited 2014ISBN 978 0 580 85642 6ICS 59.080.01 Compliance with a British Standard cannot confer
4、 immunity from legal obligations.This British Standard was published under the authority of the Standards Policy and Strategy Committee on 30 September 2014.Amendments/corrigenda issued since publicationDate T e x t a f f e c t e dEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 11092 Septem
5、ber 2014 ICS 59.080.01 English 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 rsistance thermique et de la rsistance la vap
6、eur 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 11092:2014) This European Standard was appro
7、ved 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 references concerning such national st
8、andards 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 a CEN member into its own language and
9、 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 Macedonia, France, Germany, Greece, Hungar
10、y, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELE
11、C Management Centre: Avenue Marnix 17, B-1000 Brussels 2014 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 11092:2014 EBS EN ISO 11092:2014EN ISO 11092:2014 (E) 3 Foreword This document (EN ISO 11092:2014) has been prepared by
12、 Technical Committee ISO/TC 38 “Textiles“ incollaboration with Technical Committee CEN/TC 248 “Textiles and textile products” the secretariat of which isheld by BSI. This European Standard shall be given the status of a national standard, either by publication of an identicaltext or by endorsement,
13、at the latest by March 2015, and conflicting national standards shall be withdrawn atthe latest by March 2015. Attention is drawn to the possibility that some of the elements of this document may be the subject of patentrights. CEN and/or CENELEC shall not be held responsible for identifying any or
14、all such patent rights. This document supersedes EN 31092:1993. According to the CEN-CENELEC Internal Regulations, the national standards organizations of the followingcountries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, CzechRepublic, Denmark, Estoni
15、a, 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 The text
16、 of ISO 11092:2014 has been approved by CEN as EN ISO 11092:2014 without any modification. BS EN ISO 11092:2014ISO 11092:2014(E) ISO 2014 All rights reserved iiiContents PageForeword ivIntroduction v1 Scope . 12 Terms and definitions . 13 Symbols and units . 24 Principle 35 Apparatus . 36 Test speci
17、mens 66.1 Materials 5 mm thick 66.2 Materials 5 mm thick 67 Test procedure 77.1 Determination of apparatus constants 77.2 Assembly of test specimens on the measuring unit 97.3 Measurement of thermal resistance Rct.97.4 Measurement of water-vapour resistance Ret.108 Precision of results108.1 Repeatab
18、ility 108.2 Reproducibility 109 Test report 10Annex A (normative) Mounting procedure for specimens containing loose filling materials or having uneven thickness .12Annex B (normative) Determination of correction terms for heating power 13Annex C (informative) Guidance on test specimen assembly for m
19、aterials prone to swelling .14BS EN ISO 11092:2014ISO 11092:2014(E)ForewordISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical
20、committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with
21、the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.The procedures used to develop this document and those intended for its further maintenance are described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for
22、 the different types of ISO documents should be noted. This document was drafted in accordance with the editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights.
23、 ISO shall not be held responsible for identifying any or all such patent rights. Details of any patent rights identified during the development of the document will be in the Introduction and/or on the ISO list of patent declarations received (see www.iso.org/patents).Any trade name used in this do
24、cument is information given for the convenience of users and does not constitute an endorsement.For an explanation on the meaning of ISO specific terms and expressions related to conformity assessment, as well as information about ISOs adherence to the WTO principles in the Technical Barriers to Tra
25、de (TBT) see the following URL: Foreword - Supplementary information.The committee responsible for this document is ISO/TC 38, Textiles.This second edition cancels and replaces the first edition (ISO 11092:1993), which has been technically revised. It also incorporates Amendment 1 to ISO 11092:1993
26、(ISO 11092:1993/Amd.1:2012).iv ISO 2014 All rights reservedBS EN ISO 11092:2014ISO 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 textile materials which contribute to physiological co
27、mfort 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 combination of radiant, conductive and convective heat transf
28、er, 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 as radiant heat transfer with the surroundings.Severa
29、l 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 “skin model”) described in this International Standard
30、 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, involving combinations of temperature, relative humidity, air
31、 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-state conditions are selected. ISO 2014 All rights r
32、eserved vBS EN ISO 11092:2014BS EN ISO 11092:2014Textiles Physiological effects Measurement of thermal and water-vapour resistance under steady-state conditions (sweating guarded-hotplate test)1 ScopeThis International Standard specifies methods for the measurement of the thermal resistance and wate
33、r-vapour resistance, under steady-state conditions, of e.g. fabrics, films, coatings, foams and leather, including 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
34、 a maximum thermal resistance and water-vapour resistance which depend on the dimensions and construction of the apparatus 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 Inte
35、rnational Standard are not intended to represent specific comfort situations, and performance specifications in relation to physiological comfort are not stated.2 Terms and definitionsFor the purposes of this document, the following terms and definitions apply.2.1thermal resistanceRcttemperature dif
36、ference between the two faces of a material divided by the resultant heat flux per unit area in the direction of the 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 temperatur
37、e gradient. The dry heat flux may consist of one or more conductive, convective and radiant components.Note 2 to entry: 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 re
38、sultant evaporative heat flux per unit area in the direction of the gradientNote 1 to entry: It is a quantity specific 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 evapor
39、ative heat flux may consist of both diffusive and convective components.Note 2 to entry: Water-vapour resistance is 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)INTERNATIONA
40、L STANDARD ISO 11092:2014(E) ISO 2014 All rights reserved 1BS EN ISO 11092:2014ISO 11092:2014(E)where S equals 60 Pa/KNote 1 to entry: The water-vapour permeability index is dimensionless, and has values between 0 and 1. A value of 0 implies that the material is water-vapour impermeable, that is, it
41、 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.2.4water-vapour permeabilityWdcharacteristic of a textile material or composite depending on water-vapour resistance and temperatu
42、re 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 at Tm= 35 CNote 1 to entry: Water-vapour permeability is expressed in grams per square metre hour pascal.3 Symbols and unitsR
43、ctis the thermal resistance, in square metres kelvin per wattRetis the water-vapour resistance, in square metres pascal per wattimtis the water-vapour permeability index, dimensionlessRct0is the apparatus constant, in square metres kelvin per watt, for the measurement of thermal resistance RctRet0is
44、 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 pascalTmis the latent heat of vaporization of water at the temperature Tm, in watt hours per gramA is the area of the measur
45、ing 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 of the thermal guard, in degrees Celsiuspais the water-vapour partial pressure, in pascals, of the air in the test enclosure
46、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 of the test specimen, in metres per secondSvis the standard deviation of air speed v, in metres per secondR.H. is the relati
47、ve humidity, in percentH is the heating power supplied to the measuring unit, in watts2 ISO 2014 All rights reservedBS EN ISO 11092:2014ISO 11092:2014(E)Hcis the correction term for heating power for the measurement of thermal resistance RctHeis the correction term for heating power for the measurem
48、ent 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 is placed on an electrically heated plate with conditioned air ducted to flow across and parallel to its
49、 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 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 under the same conditions.For the determin
