1、 ISO 2012 Textiles Determination of drying rate in dynamic state by the modified sweating- guarded hotplate Textiles Dtermination de la vitesse de schage en rgime dynamique laide de la plaque chaude garde transpirante modifie INTERNATIONAL STANDARD ISO 13029 First edition 2012-08-15 Reference number
2、 ISO 13029:2012(E) ISO 13029:2012(E) ii ISO 2012 All rights reserved COPYRIGHT PROTECTED DOCUMENT ISO 2012 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and micr
3、ofilm, without permission in writing from either ISO at the address below or ISOs member body in the country of the requester. ISO copyright office Case postale 56 CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyrightiso.org Web www.iso.org Published in Switzerland ISO 1302
4、9:2012(E) ISO 2012 All rights reserved iii Contents Page Foreword iv Introduction v 1 Scope 1 2 Normative references . 1 3 Terms and definitions . 1 4 Symbols and abbreviations 2 5 Apparatus 2 5.1 General . 2 5.2 Measuring unit with water input device 2 5.3 Water input device. 2 5.4 Test enclosure 3
5、 6 Test procedure . 3 6.1 Preparation of specimen . 3 6.2 Measurement of water-vapour resistance R et3 6.3 Determination of drying time . 3 6.4 Calculation of drying time . 4 6.5 Expression of drying rate 4 7 Test report . 4 Annex A (informative) Example of test result 5 Bibliography . 6 ISO 13029:2
6、012(E) Foreword ISO (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 committees. Each member body interested in a subject for wh
7、ich 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 the International Electrotechnical Commission (IEC) on all
8、matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are ci
9、rculated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held respo
10、nsible for identifying any or all such patent rights. ISO 13029 was prepared by Technical Committee ISO/TC 38, Textiles. iv ISO 2012 All rights reserved ISO 13029:2012(E) Introduction The purpose of this International Standard is for testing textile fabrics that have moisture-management properties.
11、International Standards do not provide a detailed definition of Moisture Management Textiles. Here, moisture management generally refers to a feature in which absorbed sweat is transported within the fabric and along the fabric surface and is dried from the fabric surface. The drying that takes plac
12、e in textiles, which are designed to dry the absorbed sweat in a timely manner using the capillary-tube phenomenon, progresses in a condition that is different from the drying that is generally practiced after washing. This is because textiles intended for moisture-management properties show the fea
13、ture of drying the absorbed sweat at the same time as the sweat vapour is continuously allowed in from the human body. Also, the drying of the textile progresses by evaporating only in the direction that is opposite to the side where the sweat heated by the human body temperature contacts the skin.
14、To distinguish between these two types of drying, the condition in which textiles are dried after washing is specified as “steady state” while “dynamic state” drying is the term used for the drying feature of the textile material with moisture-management properties. To evaluate the drying condition
15、of textiles under a dynamic state, the sweating-guarded hotplate (SGHP) equipment specified in ISO 11092 has been modified and used. Distilled water is used to avoid the estimation errors that can occur when applying artificial sweat to the SGHP. This International Standard does not evaluate the phy
16、siological feature of textile materials. However, it can provide information that can be used for comparison among textile materials by estimating their drying features in limited environmental conditions. ISO 2012 All rights reserved v Textiles Determination of drying rate in dynamic state by the m
17、odified sweating-guarded hotplate 1 Scope This International Standard specifies a method for measuring the drying rate of fabric products for sports, leisure use or underwear, that have contact with the skin in their normal use, and other similar fabric products. The method is not applicable to text
18、iles that cannot be permeated by water vapour or for those textiles which are more than 5 mm thick. 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 late
19、st edition of the referenced document (including any amendments) applies. ISO 11092, Textiles Physiological effects Measurement of thermal and water-vapour resistance under steady-state conditions (sweating guarded-hotplate test) 3 Terms and definitions For the purposes of this document, the definit
20、ions given in ISO 11092 and the following apply. 3.1 moisture management feature designed into some textile fabrics to control or enhance the speed of absorption and evaporation of sweat from the wearers skin NOTE 1 Moisture-management features may include differences in spreading rates along the su
21、rfaces of the fabric intended to be in contact with the skin and with the air. NOTE 2 See AATCC method 195 for measurements of dynamic properties other than drying. 3.2 drying rate time, in seconds, for a test specimen, saturated with 5 ml of distilled water, to reach its initial water vapour steady
22、 state under isothermal test conditions 3.3 dynamic state drying condition relative to the continuous application of a specified degree of heat and moisture 3.4 water vapour resistance R et water-vapour pressure difference between the two faces of a material divided by the resultant evaporative heat
23、 flux per unit area in the direction of the gradient NOTE 1 The evaporative heat flux may consist of both diffusive and convective components. NOTE 2 Water-vapour resistance R et , expressed in square metres pascal per watt, is a quantity specific to textile materials or composites which determines
24、the “latent evaporative heat flux across a given area in response to a steady applied water-vapour pressure gradient. NOTE 3 Water-vapour resistance R etis measured according to ISO 11092. INTERNATIONAL STANDARD ISO 13029:2012(E) ISO 2012 All rights reserved 1 ISO 13029:2012(E) 4 Symbols and abbrevi
25、ations T a Temperature of the air inside the test enclosure, C T m Temperature of measuring unit, C T s Temperature of thermal guard, C RH Relative humidity inside the test enclosure, % H Heating power supplied to measuring unit, W 5 Apparatus 5.1 General For the test device, the sweating-guarded ho
26、tplate, which is specified in ISO 11092, is used with a water input device. 5.2 Measuring unit with water input device The measuring unit of the sweating-guarded hotplate is to be used as specified in ISO 11092. The water input device (Figure 1, item 7) is positioned directly above and centred on th
27、e specimen. Key 1 Specimen 2 Temperature sensor 3 Temperature controller 4 Heating power measuring device 5 Water supply device 6 Metal block, including heating elements 7 Water input device 8 Syringe connecting with flexible tubing Figure 1 Measuring unit of sweating-guarded hotplate with water inp
28、ut device 5.3 Water input device The device used to drop the water onto the test specimen is installed directly above the centre of the specimen. Tubing with an inside diameter of (3,5 0,5) mm inside the chamber is connected to a syringe outside the 2 ISO 2012 All rights reserved ISO 13029:2012(E) c
29、hamber. In all cases, the water input device shall be fixed such that the water is delivered at a height of (50 5) mm above the surface of the test specimen and that the water shall be inserted within (5 1) s by using a syringe or its equivalent. 5.4 Test enclosure The test enclosure of the sweating
30、-guarded hotplate shall conform to the contents specified in ISO 11092. 6 Test procedure 6.1 Preparation of specimen 6.1.1 Cut a minimum of 3 test specimens of (300 300) mm from the test sample. The dimension of the test specimens shall be sufficient to completely cover the surface of the measuring
31、unit and temperature guard. 6.1.2 Before testing, the specimen shall be conditioned for a minimum 12 h at 35 C and 40 % RH in a conditioning test room in accordance with ISO 11092 6.2 Measurement of water-vapour resistance R et The R etmeasurement of the test specimen by the sweating-guarded hotplat
32、e shall conform to the testing conditions and procedures of ISO 11092 regarding materials which are less than 5 mm thick. 6.2.1 Set the temperature of both the measuring unit and air to 35 C with 40 % relative humidity. Hold the air speed at 1 m/s. NOTE These isothermal conditions prevent water-vapo
33、ur condensation within the test specimen. 6.2.2 Place the test specimen on the measuring unit, wait until the instrument and specimen have reached steady-state, and read the R et value from the sweating-guarded hotplate. 6.3 Determination of drying time 6.3.1 Prepare the water input device with (5 0
34、,1) ml of water to allow the water to reach the required (20 2) C temperature. 6.3.2 After maintaining these conditions for 10 min, wet the test specimen with 5 ml of water through the water input device. 6.3.3 As the test specimen starts wetting, record the point of time where the R etvalue in the
35、steady-state starts to rapidly change (the point at which it deviates from the average value of the 5 min of steady-state immediately before adding the distilled water) as t 1. 6.3.4 By estimating the time taken until the R etvalue reaches the average R etvalue before t 1,measure the time elapsed an
36、d set it as t 2 . Here, the value of R etat t 2that is 99 % of the average R etvalue before t 1is determined using the linear interpolation method. ISO 2012 All rights reserved 3 ISO 13029:2012(E) 6.4 Calculation of drying time The drying time, t, is calculated by using the t 1and t 2values in the f
37、ollowing equation: t = t 2 t 1(1) where t: drying time of the test specimen, s; t 1 : point at which drying starts right after water moisture, s; t 2 : point at which drying of water terminates, s. Figure 2 Determination of drying time by measuring t 1and t 2 6.5 Expression of drying rate The calcul
38、ated drying time is an estimated result based on using 5 ml of distilled water, and therefore it is expressed as a drying rate in seconds per 5 ml of water. 7 Test report The test report shall include the following information: a) number and date of this International Standard; b) identification of
39、the sample; c) number of specimens; d) conditional atmosphere used; e) average and coefficient of variation for the drying rate; f) any deviation from the specified procedure in this International Standard. 4 ISO 2012 All rights reserved ISO 13029:2012(E) Annex A (informative) Example of test result
40、 A.1 Comparison of drying rates The purpose is to compare the drying rate for 4 kinds of samples which are single-layer knitted fabrics. The value is obtained by averaging three measured drying times for each specimen, and the variation coefficient within the scope of 5,5 to 7,7 % is shown. The dryi
41、ng rate of sample #1 is 2333,7 s/5 ml and the drying rate of sample #4 is 2959,3 s/5 ml in their average drying time, and thus a difference in drying performance can be quantified. A.2 Drying rates of samples In a comparison between 4 kinds of fabric samples, one person conducted the tests of “deter
42、mination of drying rate” with the same measurement procedure and instrument at the same location over a short period of time. Table A.1 shows the repeatability of the test result. Table A.1Fibre composi- tion (%) Unit mass (g/m 2 ) Determined drying time of specimen (s) Average time (s) Standard dev
43、iation Coefficient of variation (%) #1 #2 #3 sample 1 Polyester 100 % 154 2232 2534 2235 2333,7 173,5 7,4 sample 2 Polyester 100 % 161 2636 2834 2991 2820,3 177,9 6,3 sample 3 Polyester 100 % 178 2893 2618 2489 2666,7 206,4 7,7 sample 4 Polyester 100 % 184 2977 2787 3114 2959,3 164,2 5,5 ISO 2012 All rights reserved 5 ISO 13029:2012(E) Bibliography 1 AATCC Test Method 195, Liquid Moisture Management Properties of Textile Fabrics 6 ISO 2012 All rights reservedISO 13029:2012(E) ISO 2012 All rights reserved ICS 59.060.01 Price based on 6 pages
