ISO INTERNATIONAL STANDARD 15106-2 First edition 2003-01-15 Plastics Film and sheeting - Determination of water vapour transmissionrate Part 2: Infrared detection sensor method Plastiques-Film et feuille-Détermination du coefficient de transmissiondevapeurd'eau- Partie 2: Methode utilisant un detecteur infrarouge Reference number ISO15106-2:2003(E) ISO = Contents Page Foreword 1 Scope 2 Normativereference 3 Terms and definitions 4 Principle. 5 Test specimens Conditioning... 6 7 Apparatus 8 Testconditions 9 Procedure 10 Calculation. 11 Testresult 12 Precision 13 Test report ili 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 which a technical committee has been establishedhastherighttoberepresentedonthatcommittee.Internationalorganizations,governmentaland 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 the ISO/lEC Directives, Part 2 adopted by the technical committees are circulated to the member bodies for voting. Publication as an IsO 15106 consists of the following parts, under the general title Plastics -Film and sheeting Determination of water vapour transmission rate: 一 Part1:Humiditydetectionsensormethod —Part2:Infrareddetectionsensormethod Part3:Electrolyticdetectionsensormethod iv Plastics Film and sheeting Determination of water vapour transmissionrate: Part 2: Infrareddetectionsensormethod 1 Scope 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 transmission rates 2Normativereferences 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. IsO2528:1995,Sheetmaterials—Determinationof watervapourtransmissionrate—Gravimetric(dish) method Iso4593:1993,PlasticsFilmand sheeting—Determinationof thicknessbymechanical scanning 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 watervapourtransmissionrate the amount of water vapour transmitted through unit area of test specimen per unit time under specified conditions NOTE [ 3.2 referencetestspecimen a test specimenwhose water vapour transmission rate is known,or one for which the water vapour transmission rate has been determined in accordance with IsO 2528 Principle 4 A dry chamber, at a specified relative humidity, is separated from a wet chamber, in which the atmosphere is 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. 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 transmission area of the cell used forthetest, and shall be hermeticallymounted. 5.2Three specimens shall be used unless otherwise specified or agreed between the interested parties NOTE 5.3 Unlessotherwisespecified,determinethethicknessofeachspecimeninaccordancewithiSO4593at 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 material. 7 Apparatus 7.1An example of a suitable apparatus