1、BSI Standards PublicationBS ISO 16533:2014Textiles Measurement ofexothermic and endothermicproperties of textiles underhumidity changeBS ISO 16533:2014 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of ISO 16533:2014.The UK participation in its preparation was entrus
2、ted to TechnicalCommittee TCI/24, Physical testing of textiles.A list of organizations represented on this committee can beobtained on request to its secretary.This publication does not purport to include all the necessaryprovisions of a contract. Users are responsible for its correctapplication. Th
3、e British Standards Institution 2014. Published by BSI StandardsLimited 2014ISBN 978 0 580 73785 5ICS 59.080.01Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of theStandards Policy and Strategy Committee on 31 J
4、uly 2014.Amendments issued since publicationDate Text affectedBS ISO 16533:2014 ISO 2014Textiles Measurement of exothermic and endothermic properties of textiles under humidity changeTextiles Mesurage des proprits exothermiques et endothermiques de textiles sous conditions dhumidit changeantesINTERN
5、ATIONAL STANDARDISO16533First edition2014-07-01Reference numberISO 16533:2014(E)BS ISO 16533:2014ISO 16533:2014(E)ii ISO 2014 All rights reservedCOPYRIGHT PROTECTED DOCUMENT ISO 2014All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise i
6、n any form or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below or ISOs member body in the country of the requester.ISO copyright officeCase pos
7、tale 56 CH-1211 Geneva 20Tel. + 41 22 749 01 11Fax + 41 22 749 09 47E-mail copyrightiso.orgWeb www.iso.orgPublished in SwitzerlandBS ISO 16533:2014ISO 16533:2014(E) ISO 2014 All rights reserved iiiContents PageForeword ivIntroduction v1 Scope . 12 Normative references 13 Terms and definitions . 14 S
8、ymbols and units . 25 Principle 26 Apparatus . 27 Reagent . 48 Preparation of the humidity control material . 49 Test procedure 59.1 Preparation of test specimen 59.2 Preparation of apparatus . 59.3 Test specimen mounting . 59.4 Measurement of exothermic and endothermic properties . 610 Test report
9、. 8Annex A (informative) Example of hygroscopic and exothermic property test . 9Annex B (informative) Example of hygroemissive and endothermic property test .10Annex C (informative) Example of practical humidity measurement .11Bibliography .13BS ISO 16533:2014ISO 16533:2014(E)ForewordISO (the Intern
10、ational 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 which a technical committee has b
11、een 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 matters of electrotechnical sta
12、ndardization.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 the different types of ISO documents should be noted. This document was drafted in accord
13、ance 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. ISO shall not be held responsible for identifying any or all such patent rights. Details
14、 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 document is information given for the convenience of users and does not constitute an endo
15、rsement.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 Trade (TBT) see the following URL: Foreword - Supplementary informationThe committee respon
16、sible for this document is ISO/TC 38, Textiles.iv ISO 2014 All rights reservedBS ISO 16533:2014ISO 16533:2014(E)IntroductionThe thermal properties of textile materials contribute to a wearers physiological comfort, products durability, etc. Hence, there are many kinds of products with specific therm
17、al performances and various test methods that have been developed and standardized. However, these tests should be conducted in a certain humidity. The method for thermal properties in elevated or reduced humidity has not been standardized.All materials generate heat when absorbing moisture and abso
18、rb heat when releasing moisture. The heat of absorption varies according to the material, for example, the heat of absorption in wool fibre is much bigger than that in common synthetic fibre. Recently, with this property, some heat-generating textiles have been developed and applied to various produ
19、cts, such as outdoor wear, sportswear, inner wear, special working wear, and healthcare wear. Therefore, the test for the hygroscopic and exothermic properties of textiles is needed for both producers and customers. Despite these needs, accurate and reliable information about hygroscopic and exother
20、mic properties of textiles cannot be offered because of the absence of a standard test method.The exothermic and endothermic properties of textiles under changing conditions of environmental humidity can be measured with this test method and apparatus proposed in this International Standard. ISO 201
21、4 All rights reserved vBS ISO 16533:2014BS ISO 16533:2014Textiles Measurement of exothermic and endothermic properties of textiles under humidity change1 ScopeThis International Standard specifies a method for the measurement of exothermic and endothermic properties by moisture absorption and desorp
22、tion in sheet-like textiles, e.g. fabrics, knit or nonwovens for clothing, bedding, upholstery, and similar textile products.2 Normative referencesThe following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references
23、, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.ISO 3696:1987, Water for analytical laboratory use Specification and test methods3 Terms and definitionsFor the purposes of this document, the following terms an
24、d definitions apply.3.1exothermic propertyproperty of material whereby it releases heat to the surroundings3.2endothermic propertyproperty of material whereby it absorbs heat from the surroundings3.3hygroscopic and exothermic propertyproperty of material whereby it generates heat by absorbing moistu
25、re and releases the generated heat to its surroundings where relative humidity changes from low to high over time3.4hygroemissive and endothermic propertyproperty of material whereby it loses heat and cools down by releasing moisture through evaporation to its surroundings where relative humidity ch
26、anges from high to low over timeINTERNATIONAL STANDARD ISO 16533:2014(E) ISO 2014 All rights reserved 1BS ISO 16533:2014ISO 16533:2014(E)4 Symbols and unitsTAis the ambient temperature in a temperature and humidity controlled chamber, in degrees Celsius.RHAis the ambient relative humidity in a tempe
27、rature and humidity controlled chamber, in per cent.RH1is the relative humidity in the first constant humidity container, starting humidity, in per cent.RH2is the relative humidity in the second constant humidity container, target humidity, in per cent.Tpeakis the peak temperature, determined using
28、a temperature sensor with or without the test specimen mounted on the sensor probe in the second constant humidity container during the hygroscopic and exothermic property test, in degrees Celsius.Tbottomis the bottom temperature, determined using a temperature sensor with or without the test specim
29、en mounted on the sensor probe in the second constant humidity container during the hygroemissive and endothermic property test, in degrees Celsius.Texois the difference in the peak temperature, determined between a state with and another without the test specimen mounted on the sensor probe during
30、the hygroscopic and exothermic property test, in degrees Celsius.Tendois the difference in the bottom temperature, determined between a state with and another without the test specimen mounted on the sensor probe during the hygroemissive and endothermic property test, in degrees Celsius.5 PrincipleA
31、 test specimen is placed in a low humidity atmosphere and then exposed to a high humidity atmosphere, and then the other way round. The temperature of the test specimen is measured over time with a temperature sensor. The exothermic and endothermic properties of the test specimen are determined from
32、 the difference in temperature measured with the temperature sensor, between a test with and another without the test specimen mounted on the sensor probe.6 Apparatus6.1 Testing apparatus, composed of a temperature and humidity controlled chamber and small containers in which the humidity is control
33、led by chemicals and the test specimens are set through the rubber plugs as shown in Figure 1.2 ISO 2014 All rights reservedBS ISO 16533:2014ISO 16533:2014(E)Key1 temperature and humidity-controlled chamber with inner door2 constant humidity container (first)3 constant humidity container (second)4 h
34、umidity control material5 temperature sensor6 humidity sensor7 data collecting unit8 arm hole in inner doorFigure 1 Configuration of the testing apparatus6.2 Temperature and humidity-controlled chamber, with a capacity of more than 200 l with inner door and arm holes as shown in Figure 1. The tolera
35、nce of the temperature and humidity shall not exceed 0,5 C and 3 % RH, respectively.6.3 Constant humidity containers, 2 l conical flasks with branch. Humidity sensor is inserted in the branch. ISO 2014 All rights reserved 3BS ISO 16533:2014ISO 16533:2014(E)6.4 Plugs for constant humidity containers,
36、 made of silicone rubber for making a flask airtight. Temperature sensor is inserted in centre of the plug and the sensor probe protrudes 100 mm from the bottom of silicone rubber plug as shown in Figure 2a.Dimensions in millimetresa) b)Key1 silicone rubber plug2 temperature sensor probe3 test speci
37、menFigure 2 Silicone rubber plug6.5 Temperature sensor, disk type with (5 1) mm in diameter and (2,5 0,5) mm in thickness.6.6 Humidity sensor, for monitoring the humidity in constant humidity containers.6.7 Clip, with (34 3) mm in length and (8 1) mm in outside width, nickel-plated wire.6.8 Oven, fo
38、r drying specimen at (105 3) C.6.9 Dessicator.7 Reagent7.1 Sulfuric acid, reagent grade sulfuric acid.7.2 Water, obtained by single distillation, or by ion exchange, or by reverse osmosis, as specified in ISO 3696, grade 3 water.8 Preparation of the humidity control material1 000 g 10 g of sulfuric
39、acid solution can be prepared according to Table 1.4 ISO 2014 All rights reservedBS ISO 16533:2014ISO 16533:2014(E)Table 1 Relative humidity values for sulfuric acid/water solutions at a temperature of 34 CRelative humidity %Sulfuric acid mass %10 6540 4890 20NOTE The values shown in this table are
40、stated with an uncertainty 3 % RH. If necessary, concentration of sulfuric acid can be controlled.9 Test procedure9.1 Preparation of test specimen9.1.1 Specimen dimensionCut the sample into three test specimens of (50 1) mm (50 1) mm.9.1.2 ConditioningDry the specimens at 105 C for 2 h or more by us
41、ing the oven (6.8), then condition them in a desiccator until immediately before testing.9.2 Preparation of apparatus9.2.1 Set the condition of the temperature and humidity-controlled chamber (6.2) at 34 C and 90 % RH.9.2.2 Place the constant humidity containers (6.3) with the prepared sulfuric acid
42、 solution in the temperature and humidity-controlled chamber (6.2) for 2 h.9.2.3 Read the humidity of each container when it reaches the constant value. Then, check that the humidity reaches the required values. If humidity reaches the constant value but falls outside 3 % RH, adjust concentration of
43、 sulfuric acid or change the sulfuric acid solution for a new one and repeat the step.NOTE 1 Humidity in the first and second container can be set according to the test purpose by consent among the concerned parties. In case of testing at a humidity of 40 % RH, replace the 10 % RH container by a 40
44、% RH container.NOTE 2 Instead of 34 C, another chamber temperature can be applied by consent among the concerned parties.9.3 Test specimen mounting9.3.1 The test specimen is mounted on the probe at the tip of the temperature sensor stuck through a silicon rubber plug in the manner shown in Figure 2b
45、.NOTE A pair of gloves can ensure avoiding the humidity change from handling the test specimen.9.3.2 Fold a specimen in half and place the temperature sensor probe on the centre of upper half area to be tested.9.3.3 Fold one more time in order to wrap the temperature sensor probe. ISO 2014 All right
46、s reserved 5BS ISO 16533:2014ISO 16533:2014(E)9.3.4 Hold the test specimen with a clip.Dimensions in millimetresFigure 3 Mounting of test specimen9.3.5 After mounting the specimen, insert the plug into the mouth of a first container immediately.9.4 Measurement of exothermic and endothermic propertie
47、s9.4.1 Hygroscopic and exothermic property test9.4.1.1 Insert a silicone rubber plug mounted with the test specimen and sensor (6.5) into the mouth of a low humidity container (a first container) with an internal relative humidity of 10 % RH and push it down until it is secure. Then, allow the conta
48、iner to stand for a minimum of 3 h.NOTE 40 % RH and any other humidity can be applied by consent among the concerned parties.9.4.1.2 Start recording the sensor temperature. Then, remove the plug with test specimen and transfer it to the mouth of a high humidity container (a second container) with an
49、 internal relative humidity of 90 % RH; then, push it down again until it is secure.9.4.1.3 Record the sensor temperature for 30 min or more.9.4.1.4 Read the peak temperature, Tpeak, from the recorded temperature data as shown in Figure 4.9.4.1.5 Read the blank peak temperature using the silicon rubber plug and the temperature sensor without the test specimen in the same manner as for determining the peak temperature of the test specimen.9.4.1.6 Calculate Texofrom Formula (1):Texo= Tpeakof test spec
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