1、BRITISH STANDARD BS EN ISO 15106-2:2005 Plastics Film and sheeting Determination of water vapour transmission rate Part 2: Infrared detection sensor method The European Standard EN ISO 15106-2:2005 has the status of a British Standard ICS 83.140.10 BS EN ISO 15106-2:2005 This British Standard was pu
2、blished under the authority of the Standards Policy and Strategy Committee on 29 March 2005 BSI 29 March 2005 ISBN 0 580 45629 3 National foreword This British Standard is the official English language version of EN ISO 15106-2:2005. It is identical with ISO 15106-2:2003. The UK participation in its
3、 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 or E
4、uropean 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 includ
5、e 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 enquiri
6、es 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 page
7、, the ISO title page, pages ii to iv, pages 1 to 5 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 ENISO151062 February2005 ICS8
8、3.140.10 Englishversion PlasticsFilmandsheetingDeterminationofwatervapour transmissionratePart2:Infrareddetectionsensormethod (ISO151062:2003) PlastiquesFilmetfeuilleDterminationducoefficientde transmissiondevapeurdeauPartie2:Mthodeutilisant undtecteurinfrarouge(ISO151062:2003) KunststoffeFolienundF
9、lchengebildeBestimmungder WasserdampfdurchlssigkeitTeil2:Verfahrenmit Infrarotsensor(ISO151062:2003) ThisEuropeanStandardwasapprovedbyCENon3February2005. CENmembersareboundtocomplywiththeCEN/CENELECInternalRegulationswhichstipulatetheconditionsforgivingthisEurope an Standardthestatusofanationalstand
10、ardwithoutanyalteration.Uptodatelistsandbibliographicalreferencesconcernings uchnational standardsmaybeobtainedonapplicationtotheCentralSecretariatortoanyCENmember. ThisEuropeanStandardexistsinthreeofficialversions(English,French,German).Aversioninanyotherlanguagemadebytra nslation undertheresponsib
11、ilityofaCENmemberintoitsownlanguageandnotifiedtotheCentralSecretariathasthesamestatusast heofficial versions. CENmembersarethenationalstandardsbodiesofAustria,Belgium,Cyprus,CzechRepublic,Denmark,Estonia,Finland,France, Germany,Greece,Hungary,Iceland,Ireland,Italy,Latvia,Lithuania,Luxembourg,Malta,N
12、etherlands,Norway,Poland,Portugal, Slovakia, Slovenia,Spain,Sweden,SwitzerlandandUnitedKingdom. EUROPEANCOMMITTEEFORSTANDARDIZATION COMITEUROPENDENORMALISATION EUROPISCHESKOMITEEFRNORMUNG ManagementCentre:ruedeStassart,36B1050Brussels 2005CEN Allrightsofexploitationinanyformandbyanymeansreserved wor
13、ldwideforCENnationalMembers. Ref.No.ENISO151062:2005:E 2 Foreword The text of ISO 15106-2:2003 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 15106-2:2005 by Technical Committee CEN/TC 249 “P
14、lastics“, 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 withdrawn at the latest by August 2005.
15、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, Hungary, Iceland, Ireland, Italy, Latvia, Li
16、thuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. Endorsement notice The text of ISO 15106-2:2003 has been approved by CEN as EN ISO 15106-2:2005 without any modifications. ENISO151062:2005 Reference number ISO 15106
17、-2:2003(E)INTERNATIONAL STANDARD ISO 15106-2 First edition 2003-01-15 Plastics Film and sheeting Determination of water vapour transmission rate Part 2: Infrared detection sensor method Plastiques Film et feuille Dtermination du coefficient de transmission de vapeur deau Partie 2: Mthode utilisant u
18、n dtecteur infrarouge ENISO151062:2005ii ENISO151062:2005 iiiContents Page Foreword iv 1 Scope 1 2 Normative references . 1 3 Terms and definitions. 1 4 Principle . 2 5 Test specimens . 2 6 Conditioning 2 7 Apparatus 2 8 Test conditions 3 9 Procedure 4 10 Calculation. 4 11 Test result 4 12 Precision
19、 5 13 Test report . 5 ENISO151062:2005iv 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 b
20、ody 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 the International Electro
21、technical Commission (IEC) on all 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
22、by the technical committees are circulated 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 r
23、ights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 15106-2 was prepared by Technical Committee ISO/TC 61, Plastics, Subcommittee SC 11, Products. ISO 15106 consists of the following parts, under the general title Plastics Film and sheeting Determination of wa
24、ter vapour transmission rate: Part 1: Humidity detection sensor method Part 2: Infrared detection sensor method Part 3: Electrolytic detection sensor method ENISO151062:2005 1Plastics Film and sheeting Determination of water vapour transmission rate Part 2: Infrared detection sensor method 1 Scope T
25、his part of ISO 15106 specifies an instrumental method for determining the water vapour transmission rate of plastic film, plastic sheeting and multi-layer structures including plastics, using an infrared detection sensor. NOTE The method provides rapid measurement over a wide range of water vapour
26、transmission rates. 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 latest edition of the referenced document (including any amendments) applies. ISO 25
27、28:1995, Sheet materials Determination of water vapour transmission rate Gravimetric (dish) method ISO 4593:1993, Plastics Film and sheeting Determination of thickness by mechanical scanning 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 wat
28、er vapour transmission rate the amount of water vapour transmitted through unit area of test specimen per unit time under specified conditions NOTE Water vapour transmission rate is expressed in grams per square metre 24 hours g/(m 2 24 h). 3.2 reference test specimen a test specimen whose water vap
29、our transmission rate is known, or one for which the water vapour transmission rate has been determined in accordance with ISO 2528 ENISO151062:20052 4 Principle A dry chamber, at a specified relative humidity, is separated from a wet chamber, in which the atmosphere is saturated with water vapour a
30、t a known temperature, by a sheet of the material to be tested. The change in humidity brought about by water vapour transmitted through the specimen is detected by an infrared sensor capable of providing an electrical output signal which is a measure of the relative humidity in the dry chamber. The
31、 time taken to reach a steady state is measured and converted into a water vapour transmission rate. 5 Test specimens 5.1 The specimens shall be representative of the material, be free from wrinkles, creases and pinholes, and have uniform thickness. Each specimen shall have a larger area than the tr
32、ansmission 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 specimens gives a more representative result. 5.3 Unless otherwise
33、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 shall be as stated in the relevant specification for the materi
34、al. 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 (high-humidity) chamber and an upper (low-humidity) chamber between which a specimen is mounted, an infrared sensor for determining the relative humidity
35、 in the upper chamber, a pump for circulating the air in the upper chamber through the sensor, a flow meter, a drying tube and switch valves. 7.2 The transmission area shall be between 5 cm 2and 100 cm 2 . The specimen shall never be able to touch the upper or lower inside surface of the transmissio
36、n cell. The temperature of the transmission cell shall be kept within 0,5 C 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 infrared detection sensor shall be capable of detecting a chan
37、ge in water vapour content of either 1 g per litre or 1 mm 3 /dm 3(1 ppm by volume). For each type of humidity sensor, the appropriate maintenance and calibration procedures shall be followed as specified by the manufacturer. 7.5 The drying tube shall be capable of drying air down to the detection l
38、imit of the infrared sensor or lower. ENISO151062:2005 3Key 1 Specimen 6 Infrared sensor 2 Transmission cell 7 Recorder 3 Cotton wool soaked in suitable solution 8 Control valve 4 Switch valve 9 Flow meter 5 Pump 10 Drying tube Figure 1 Example of water vapour transmission rate measuring apparatus w
39、ith infrared 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 Temperature 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
40、be agreed upon by the interested parties. ENISO151062:20054 9 Procedure 9.1 Measure the water vapour transmission rate of a reference specimen and then each test specimen as described in 9.2 to 9.5. The water vapour transmission rate of the reference specimen shall be checked periodically, preferabl
41、y once or twice a year. Each laboratory or test site shall maintain and utilize their own reference specimens. 9.2 Measure the zero-level voltage of the apparatus using dried air. 9.3 Prepare a saturated solution suitable for maintaining the humidity at the required level, and introduce it into the
42、lower chamber together with some cotton wool. NOTE A relative humidity of (90 2) % is produced by a saturated solution of either zinc sulfate or ammonium dihydrogen phosphate. A relative humidity of (85 2) % is produced by a saturated solution of potassium chloride. A relative humidity of (75 2) % i
43、s produced by a saturated solution of sodium chloride or sodium acetate. 9.4 Mount the reference specimen or test specimen hermetically between the upper and lower chambers, taking care that there are no wrinkles or slackness in the specimen. 9.5 Fit the transmission cell in the apparatus and then a
44、llow dry air to flow through the upper chamber at the specified flow rate. Monitor the output voltage from the infrared sensor until it reaches a steady state in which it is constant to within 5 %. NOTE The flow rate should be specified by the manufacturer of the apparatus. If the voltage is not con
45、stant to within 5 %, this shall be indicated in the test report. 10 Calculation Calculate the water vapour transmission rate of each test specimen using the following equation: ( ) () S0 R R0 S WVTR SEE A E EA = where WVTR is the water vapour transmission rate of the test specimen, expressed in gram
46、s per square metre 24 hours g/(m 2 24 h); E 0is the zero-level voltage, in volts, of the apparatus using dried air; E Ris the steady-state voltage, in volts, measured with the reference specimen; S is the water vapour transmission rate of the reference specimen, in g/(m 2 24 h); E Sis the steady-sta
47、te voltage, in volts, measured with the test specimen; A Ris the transmission area, in square metres, of the reference specimen; A Sis the transmission area, in square metres, of the test specimen. 11 Test result Calculate the test result as the arithmetic mean of the results obtained for each test
48、specimen, 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. ENISO151062:2005 512 Precision The precision of this test method is not known because inter-laboratory data are not available. When inter-laboratory data are obtained, a precision statement will be added at the following revision. 13 Test report The test report shall include
