1、BRITISH STANDARD BS EN ISO 15106-3:2005 Plastics Film and sheeting Determination of water vapour transmission rate Part 3: Electrolytic detection sensor method The European Standard EN ISO 15106-3:2005 has the status of a British Standard ICS 83.140.10 BS EN ISO 15106-3:2005 This British Standard wa
2、s published under the authority of the Standards Policy and Strategy Committee on 29 March 2005 BSI 29 March 2005 ISBN 0 580 45628 5 National foreword This British Standard is the official English language version of EN ISO 15106-3:2005. It is identical with ISO 15106-3:2003. The UK participation in
3、 its preparation was entrusted to Technical Committee PRI/75, Plastics and rubber film and sheets, which has the responsibility to: A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement international
4、or European publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online. This publication does not purport to in
5、clude all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible international/European committee any enq
6、uiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the EN ISO title page, the EN ISO foreword
7、page, the ISO title page, pages ii to iv, pages 1 to 6, an inside back cover and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. Date CommentsEUROPEANSTANDARD NORMEEUROPENNE EUROPISCHENORM ENI
8、SO151063 February2005 ICS83.140.10 Englishversion PlasticsFilmandsheetingDeterminationofwatervapour transmissionratePart3:Electrolyticdetectionsensormethod (ISO151063:2003) PlastiquesFilmetfeuilleDterminationducoefficientde transmissiondevapeurdeauPartie3:Mthodeutilisant undtecteurlectrolytique(ISO1
9、51063:2003) KunststoffeFolienundFlchengebildeBestimmungder WasserdampfdurchlssigkeitTeil3:Elektrolytnachweis Sensorverfahren(ISO151063:2003) ThisEuropeanStandardwasapprovedbyCENon3February2005. CENmembersareboundtocomplywiththeCEN/CENELECInternalRegulationswhichstipulatetheconditionsforgivingthisEur
10、ope an Standardthestatusofanationalstandardwithoutanyalteration.Uptodatelistsandbibliographicalreferencesconcernings uchnational standardsmaybeobtainedonapplicationtotheCentralSecretariatortoanyCENmember. ThisEuropeanStandardexistsinthreeofficialversions(English,French,German).Aversioninanyotherlang
11、uagemadebytra nslation undertheresponsibilityofaCENmemberintoitsownlanguageandnotifiedtotheCentralSecretariathasthesamestatusast heofficial versions. CENmembersarethenationalstandardsbodiesofAustria,Belgium,Cyprus,CzechRepublic,Denmark,Estonia,Finland,France, Germany,Greece,Hungary,Iceland,Ireland,I
12、taly,Latvia,Lithuania,Luxembourg,Malta,Netherlands,Norway,Poland,Portugal, Slovakia, Slovenia,Spain,Sweden,SwitzerlandandUnitedKingdom. EUROPEANCOMMITTEEFORSTANDARDIZATION COMITEUROPENDENORMALISATION EUROPISCHESKOMITEEFRNORMUNG ManagementCentre:ruedeStassart,36B1050Brussels 2005CEN Allrightsofexploi
13、tationinanyformandbyanymeansreserved worldwideforCENnationalMembers. Ref.No.ENISO151063:2005:E Foreword The text of ISO 15106-3:2003 has been prepared by Technical Committee ISO/TC 61 “Plastics” of the International Organization for Standardization (ISO) and has been taken over as EN ISO 15106-3:200
14、5 by Technical Committee CEN/TC 249 “Plastics“, the secretariat of which is held by IBN. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by August 2005, and conflicting national standards shall be wi
15、thdrawn at the latest by August 2005. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungar
16、y, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. Endorsement notice The text of ISO 15106-3:2003 has been approved by CEN as EN ISO 15106-3:2005 without any modifications. ENISO
17、151063:2005 Reference number ISO 15106-3:2003(E)INTERNATIONAL STANDARD ISO 15106-3 First edition 2003-01-15 Plastics Film and sheeting Determination of water vapour transmission rate Part 3: Electrolytic detection sensor method Plastiques Film et feuille Dtermination du coefficient de transmission d
18、e vapeur deau Partie 3: Mthode utilisant un dtecteur lectrolytique ENISO151063:2005ii ENISO151063:2005 iiiContents Page Foreword iv 1 Scope 1 2 Normative references. 1 3 Term and definition. 1 4 Principle. 1 5 Test specimens. 2 6 Conditioning 2 7 Apparatus 2 8 Test conditions 3 9 Procedure 4 10 Calc
19、ulation. 4 11 Test result 4 12 Precision 5 13 Test report. 5 Annex A (informative) Relationship between relative humidity and concentration of sulfuric acid solution 6 ENISO151063:2005iv Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards
20、 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 been established has the right to be represented on that committee. International organiza
21、tions, 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 standardization. International Standards are drafted in accordance with the rules given in t
22、he 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 circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of
23、 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 responsible for identifying any or all such patent rights. ISO 15106-3 was prepared by Technical Committee ISO/TC 61, Plastic
24、s, Subcommittee SC 11, Products. ISO 15106 consists of the following parts, under the general title Plastics Film and sheeting Determination of water vapour transmission rate: Part 1: Humidity detection sensor method Part 2: Infrared detection sensor method Part 3: Electrolytic detection sensor meth
25、od ENISO151063:2005 1Plastics Film and sheeting Determination of water vapour transmission rate Part 3: Electrolytic detection sensor method 1 Scope This part of ISO 15106 specifies an instrumental method for determining the water vapour transmission rate of plastic film, plastic sheeting and multi-
26、layer structures including plastics, using an electrolytic detection sensor. NOTE The method provides rapid measurement over a wide range of water vapour transmission rates. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated re
27、ferences, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 2528:1995, Sheet materials Determination of water vapour transmission rate Gravimetric (dish) method ISO 4593:1993, Plastics Film and sheeting Deter
28、mination of thickness by mechanical scanning 3 Term and definition For the purposes of this document, the following term and definition apply. 3.1 water vapour transmission rate the amount of water vapour transmitted through unit area of test specimen per unit time under specified conditions NOTE Wa
29、ter vapour transmission rate is expressed in grams per square metre 24 hours g/(m 2 24 h). 4 Principle The gas transmission cell is designed in such a way that, with the test specimen inserted, it is divided into a dry chamber and a controlled-humidity chamber. The dry side of the specimen is swept
30、by a flow of dry carrier gas, and water vapour permeating through the specimen from the controlled-humidity chamber is carried by the carrier gas into an electrolytic cell. This cell contains two spiral wire electrodes, coated with a thin layer of phosphorous pentoxide, mounted on the inside wall of
31、 a glass capillary. The carrier gas is passed through the capillary where the moisture it holds is quantitatively absorbed by the phosphorous pentoxide and decomposed electrolytically into hydrogen and oxygen by the application of a D.C. voltage of about 70 V to the electrodes. The mass of the moist
32、ure which permeates through the specimen and is decomposed per unit time is calculated from the electrolytic current required. EN5002:360151OSIENISO151063:20052 5 Test specimens 5.1 The specimens shall be representative of the material, be free from wrinkles, creases and pinholes, and have uniform t
33、hickness. Each specimen shall have a larger area than the transmission area of the cell used for the test, and shall be hermetically mounted. 5.2 Three specimens shall be used unless otherwise specified or agreed between the interested parties. NOTE For some products, testing more than three specime
34、ns gives a more representative result. 5.3 Unless otherwise specified, determine the thickness of each specimen in accordance with ISO 4593 at three points that are equally spaced. 6 Conditioning Condition the specimens at 23 C 2 C and a relative humidity of (50 10) %. The period of conditioning sha
35、ll be as stated in the relevant specification for the material. 7 Apparatus 7.1 An example of a suitable apparatus is shown in Figure 1. The apparatus includes a transmission cell with two chambers, a lower (dry) chamber and an upper (controlled-humidity) chamber between which a specimen is mounted,
36、 an electrolytic cell to determine the amount of water vapour transmitted, a flow meter, two drying tubes (containing e.g. molecular-sieve material) and a switch valve. 7.2 The transmission area shall be between 5 cm 2and 100 cm 2 . The temperature of the transmission cell shall be kept within 0,5 C
37、 of the test temperature by means of a temperature controller. 7.3 The flow meter shall be capable of measuring flow rates from 5 ml to 100 ml per minute. 7.4 The drying tubes shall be capable of drying the carrier gas down to the detection limit of the electrolytic cell or lower. ENISO151063:2005 3
38、Key 1 Drying tubes (containing e.g. a molecular sieve) 2 Two-chamber transmission cell (with thermostatted liquid flowing through both halves) 3 Specimen 4 Glass-fibre plate impregnated with sulfuric acid solution 5 Electrolytic cell 6 Switch valve 7 Copper tubing for carrier-gas supply (in thermost
39、atted liquid to bring gas to test temperature) Figure 1 Example of water vapour transmission rate measuring apparatus with electrolytic sensor 8 Test conditions The test conditions should preferably be chosen from those given in Table 1. Table 1 Choice of test conditions Set of test conditions Tempe
40、rature C RH % 1 2 3 4 5 25 0,5 38 0,5 40 0,5 23 0,5 25 0,5 90 2 90 2 90 2 85 2 75 2 Test conditions other than these shall be agreed upon by the interested parties. ENISO151063:20054 9 Procedure 9.1 Measure the water vapour transmission rate of each specimen as described in 9.2 to 9.7. 9.2 Place a g
41、lass-fibre plate impregnated with a suitable sulfuric acid solution in the upper chamber to produce a constant humidity level. NOTE The relationship between relative humidity and the concentration of the sulfuric acid solution is shown in Annex A. 9.3 Place the specimen between the upper and lower c
42、hambers (see Figure 1), and close the transmission cell to give a gastight assembly. 9.4 With the switch valve positioned so that the carrier gas follows the path A-B, feed carrier gas through the drying tubes into the lower chamber. NOTE The gas now bypasses the electrolytic cell and passes directl
43、y into the atmosphere. This prevents the humid air which enters the lower chamber when a specimen is put in place from being carried into the electrolytic cell and moistening it, invalidating the test results. 9.5 Apply a constant D.C. voltage of about 70 V to the electrolytic cell. NOTE It is recom
44、mended that the electrolytic cell be kept permanently switched on, unless it is not going to be used for a long period. 9.6 After about 30 min, position the switch valve so that the carrier gas follows the path C-B and passes through the electrolytic cell. Monitor the current. 9.7 When the current r
45、emains constant, indicating that permeation has reached a steady state, record this value. 10 Calculation Calculate the water vapour transmission rate of each test specimen using the following equation: WVTR 8,067 I A = where WVTR is the water vapour transmission rate of the specimen, expressed in g
46、rams per square metre 24 hours g/(m 2 24 h; A is the transmission area, in square metres, of the test specimen; I is the electrolytic current, in amperes; 8,076 is the instrument constant. 11 Test result Calculate the test result as the arithmetic mean of the results obtained for each test specimen,
47、 rounding to the second place of decimals if the value is less than one, and to two significant figures if the value is greater than one. ENISO151063:2005 512 Precision The precision of this test method is not known because inter-laboratory data are not available. When inter-laboratory data are obta
48、ined, a precision statement will be added at the following revision. 13 Test report The test report shall include the following information: a) a reference to this part of ISO 15106; b) the name of the apparatus used; c) the test conditions; d) all details necessary for identification of the sample tested; e) the method of preparation of the test specimens; f) the side of the test specimen which faced the supply of water vapour; g
