1、 Reference number ISO 20492-4:2010(E) ISO 2010INTERNATIONAL STANDARD ISO 20492-4 First edition 2010-08-15 Glass in buildings Insulating glass Part 4: Methods of test for the physical attributes of edge seals Verre dans la construction Verre isolant Partie 4: Mthodes dessai pour les caractristiques p
2、hysiques des joints dassemblage ISO 20492-4:2010(E) PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobes licensing policy, this file may be printed or viewed but shall not be edited unless the typefaces which are embedded are licensed to and installed on the compute
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5、ntral Secretariat at the address given below. COPYRIGHT PROTECTED DOCUMENT ISO 2010 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 microfilm, without permissi
6、on 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 ii ISO 2010 All rights reserved
7、ISO 20492-4:2010(E) ISO 2010 All rights reserved iiiContents Page Foreword iv Introduction.v 1 Scope1 2 Normative references1 3 Terms, definitions and symbols 1 3.1 Terms and definitions .1 3.2 Symbols2 4 Requirements.2 4.1 Edge seal strength 2 4.2 Compliance with the definition of insulating glass
8、units3 5 Test methods .4 5.1 Adhesion 4 5.2 Moisture vapour transmission rate .6 5.3 Gas permeation test on film .7 6 Test report8 Annex A (normative) Test specimens for adhesion test 10 Annex B (normative) Requirement for edge seal strength comparisons in case of substituting sealant 13 Annex C (no
9、rmative) Method of measuring the moisture vapour transmission rate 14 Annex D (normative) Adhesion on coatings and interlayer adhesion of coatings17 Annex E (normative) Informative tests .22 Annex F (informative) Example of a sun-simulating radiation source 23 Bibliography24 ISO 20492-4:2010(E) iv I
10、SO 2010 All rights reservedForeword 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
11、 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 Electrotechnical Comm
12、ission (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 by the technic
13、al 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 rights. ISO sha
14、ll not be held responsible for identifying any or all such patent rights. ISO 20492-4 was prepared by Technical Committee ISO/TC 160, Glass in building, Subcommittee SC 1, Product considerations. ISO 20492 consists of the following parts, under the general title Glass in buildings Insulating glass:
15、Part 1: Durability of edge seals by climate tests Part 2: Chemical fogging tests Part 3: Gas concentration and gas leakage Part 4: Methods of test for the physical attributes of edge seals ISO 20492-4:2010(E) ISO 2010 All rights reserved vIntroduction This International Standard consists of a series
16、 of procedures for testing the performance of pre-assembled, permanently sealed insulating glass units or insulating glass units with capillary tubes that have been intentionally left open. This International Standard is intended to help ensure that energy savings are made, as the U value and solar
17、factor (solar heat gain coefficient) do not change significantly; health is preserved, because sound reduction and vision do not change significantly; safety is provided because mechanical resistance does not change significantly. This International Standard also covers additional characteristics th
18、at are important to the trade, and marking of the product (i.e. CE marking or other regulatory groups). There are distinct markets to consider for insulating glass. Within each market there are technical differences with respect to rebate sizes, vision lines and methods of application; two approache
19、s are included in this International Standard. Approach 1 addresses requirements for markets such as North America. Approach 2 addresses requirements for markets such as Europe. Each approach includes separate test methods and specifications pertaining to minimum requirements for durability of edge
20、seals by climate tests. This International Standard does not cover physical requirements of sealed glass insulating units such as appearance, thermo-physical properties, heat and light transmission, and glass displacement. The main intended uses of the insulating glass units are installations in bui
21、ldings and constructions such as in windows, doors, curtain walling, skylights, roofs and partitions where protection against direct ultraviolet radiation exists at the edges. The use of insulating glass in cases where there is no protection against direct ultraviolet radiation at the edges, such as
22、 structural glazing systems, can be suitable. However, it can be necessary to review factors such as sealant longevity when exposed to long-term ultraviolet light and the structural properties of the sealant for these applications. NOTE 1 For more information on the requirements for structural seala
23、nt glazing applications, reference can be made to ASTM C1369, ASTM C1249 and ASTM C1265 and CEN technical specifications. NOTE 2 IG units whose function is artistic only are not part of this International Standard. The test methods in this International Standard are intended to provide a means for t
24、esting the performance of the sealing system and construction of sealed insulating glass units. Sealed insulating glass units tested in accordance with these methods are not intended for long-term immersion in water. The options for testing apply only to sealed insulating glass units that are constr
25、ucted with glass. In certain cases such as insulating glass units containing spandrel glass or absorptive coatings, these methods might not be applicable, as these products can experience field temperatures that exceed the temperature limitations of the sealant. INTERNATIONAL STANDARD ISO 20492-4:20
26、10(E) ISO 2010 All rights reserved 1Glass in buildings Insulating glass Part 4: Methods of test for the physical attributes of edge seals 1 Scope This part of ISO 20492 specifies methods for testing the edge seal strength, and partially testing the moisture and gas permeation through sealants, of gl
27、ass insulating units. Other parts of ISO 20492 designate two approaches to the standardization of insulating glass units: approach 1 is intended for use in markets such as North America; and approach 2 is intended for use in markets such as Europe. The methods in this part of ISO 20492 are applicabl
28、e only to approach 2, as defined and used in the other parts of ISO 20492. In cases where there is no protection against direct ultraviolet radiation at the edges, such as structural sealant glazing systems, it is necessary that additional European technical specifications be followed. See Reference
29、s 4 and 5. 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 20492-1, Gl
30、ass in building Insulating glass Part 1: Durability of edge seals by climate tests ISO 20492-3, Glass in building Insulating glass Part 3: Gas concentration and gas leakage ISO 9050, Glass in building Determination of light transmittance, solar direct transmittance, total solar energy transmittance,
31、 ultraviolet transmittance and related glazing factors EN 1096 (all parts), Glass in building Coated glass 3 Terms, definitions and symbols 3.1 Terms and definitions For the purpose of this document, the terms and definitions given in ISO 20492-1 and the following apply. 3.1.1 moisture vapour transm
32、ission rate steady moisture vapour flow in unit time through unit area of a body, normal to specific parallel surfaces, under specific conditions of temperature and humidity at each surface 3.1.2 standard room conditions ambient temperature of (23 2) C and a relative humidity of (50 5) % relative hu
33、midity ISO 20492-4:2010(E) 2 ISO 2010 All rights reserved3.2 Symbols For the purpose of this document, the symbols given in ISO 20492-1 and the following apply. extension of bond expressed as a percent stress applied to the bond during extension moisture vapour transmission rate P H 2 Odifference in
34、 water vapour pressure across a membrane 4 Requirements 4.1 Edge seal strength All edge seals shall have sufficient adhesive and cohesive strength to allow the extension of seals such that any rupture of the seal occurs outside the area 0AB of Figure 1. If, during the strength test of the glass-seal
35、ant-glass joint, as seen from the side view, loss of adhesion or cohesion extends through the whole depth of the sealant within the area 0AB of Figure 1, then the sealant test specimen has failed (see Figure 2). The principle of light transmission through the defect can be applied to determine pass
36、or failure. Breakage of the glass during testing does not constitute failure, providing that a sufficient number of joints is tested in order that a successful average result can be obtained. For comparisons of the seal strength required for substituting sealants, see Annex B. Key X strain in the se
37、alant, Y stress in the sealant, aNo breakage is allowed before and after ageing in area 0AB. Figure 1 Stress/strain triangle ISO 20492-4:2010(E) ISO 2010 All rights reserved 3Key 1 loss of cohesion 2 loss of adhesion Figure 2 Illustration of the extension of loss of adhesion or cohesion through the
38、whole depth 4.2 Compliance with the definition of insulating glass units 4.2.1 General A test report shall be available of the concerned insulating glass outer sealant according to Clause 6 (which summarizes the test report in which the edge seal strength is recorded) with a moisture penetration tes
39、t report in accordance with ISO 20492-1 and, in case of gas-filled units, also with a gas leakage rate report in accordance with ISO 20492-3, and fulfils the requirement to demonstrate the conformity with the definition of insulating glass units. In the case of sealing the insulating glass unit with
40、 a coating that is not intended to be stripped in accordance with EN 1096 (all parts), a test report in accordance with Annex D shall be made available for inclusion in with the other test reports. NOTE Although only clear float glass is referred to in this part of ISO 10492, it is the responsibilit
41、y of the insulating glass manufacturer to ensure that the edge sealant is capable of bonding to all glasses that are used. The requirements for the use of coated glasses in accordance with EN 1096 (all parts) are detailed in Annex D. 4.2.2 Possibility to substitute the sealant 4.2.2.1 Limits of appl
42、ication The possibility of substituting for the sealant is applicable only in the case of insulating glass units with a hollow metal spacer. For other systems, no experience is available for setting up the substitution rules. 4.2.2.2 Air-filled insulating glass units Available test reports in accord
43、ance with Clause 6 allow for the substitution of the sealant without repeated moisture penetration testing in accordance with ISO 20492-1 in the following cases. a) For units with an I value below 0,1, the substituting sealant shall be applicable with the same production equipment, has been previous
44、ly applied in insulating glass units that have been demonstrated to comply with ISO 20492-1; the demonstrated compliance may have been obtained separately using units of different construction and, therefore, the test report numbers may vary, has a moisture vapour transmission rate that is not more
45、than 20 % higher than that of the initial sealant, ISO 20492-4:2010(E) 4 ISO 2010 All rights reserved has a stress/strain curve comparison that satisfies the requirement in Annex B, shall have the relevant parts of the factory production control (periodic test, mixing ratio, hardness test, etc.) car
46、ried out. b) For units with an I value between 0,1 and 0,2, the list under a) applies however with the exception that the moisture vapour transmission rate through membrane of the substitute sealant shall be the same or lower than the initial sealant. 4.2.2.3 Gas-filled insulating glass units Availa
47、ble test reports in accordance with Clause 6 allow the substitution of the sealant without repeated gas loss rate testing according to ISO 20492-3 in the following cases. a) For units with a gas loss rate, L i , below 0,8 % a 1 , the substituting sealant is allowed for limiting the moisture vapour p
48、enetration in accordance with 4.2.2.2, has been previously applied in insulating glass units that have been demonstrated to comply with ISO 20492-3; the demonstrated compliance may have been obtained separately using units of different construction and, therefore, the test report numbers may vary, h
49、as a gas permeation that is not more than 20 % higher than that of the initial sealant. For units with a gas loss rate, L i , between 0,8 % a 1and 1,0 % a 1 , the list under a) applies, however with the exception that the gas permeation of the substitute sealant shall be the same or lower than the initial sealant. 4.2.3 Possibility of substitute the coated glass, coatings not intended to be removed Available test reports in accordance with Annex D allow for the substit
