1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN ISO 4920:2012Textile fabrics - Determination of resistance to surface wetting (spray test)BS EN ISO 4920:2012 BRITISH STANDARDNational forewordThis British Standard is the
2、UK implementation of EN ISO 4920:2012. It supersedes BS EN 24920:1992 which is withdrawn.The UK participation in its preparation was entrusted to Technical Committee TCI/24, Physical testing of textiles.A list of organizations represented on this committee can be obtained on request to its secretary
3、.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. The British Standards Institution 2012. Published by BSI Standards Limited 2012ISBN 978 0 580 71174 9 ICS 59.080.30 Compliance with a British Standard cannot c
4、onfer immunity from legal obligations.This British Standard was published under the authority of the Standards Policy and Strategy Committee on 30 September 2012.Amendments issued since publicationDate Text affectedEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 4920 August 2012 ICS 59.080.
5、30 Supersedes EN 24920:1992English Version Textile fabrics - Determination of resistance to surface wetting (spray test) (ISO 4920:2012) toffes - Dtermination de la rsistance au mouillage superficiel (essai darrosage) (ISO 4920:2012) Textilien - Bestimmung der wasserabweisenden Eigenschaften (Sprhve
6、rfahren) (ISO 4920:2012) This European Standard was approved by CEN on 20 April 2012. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists
7、and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under th
8、e responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugos
9、lav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN
10、DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2012 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 4920:2012: EBS EN ISO 4920:2012EN ISO 4920:2012 (E) 3 Foreword This docum
11、ent (EN ISO 4920:2012) has been prepared by Technical Committee ISO/TC 38 “Textiles“ in collaboration with Technical Committee CEN/TC 248 “Textiles and textile products” the secretariat of which is held by BSI. This European Standard shall be given the status of a national standard, either by public
12、ation of an identical text or by endorsement, at the latest by February 2013, and conflicting national standards shall be withdrawn at the latest by February 2013. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and/or CENELEC
13、 shall not be held responsible for identifying any or all such patent rights. This document supersedes EN 24920:1992. According to the CEN/CENELEC Internal Regulations, the national standards organisations of the following countries are bound to implement this European Standard: Austria, Belgium, Bu
14、lgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland,
15、Turkey and the United Kingdom. Endorsement notice The text of ISO 4920:2012 has been approved by CEN as a EN ISO 4920:2012 without any modification. BS EN ISO 4920:2012ISO 4920:2012(E)ForewordISO (the International Organization for Standardization) is a worldwide federation of national standards bod
16、ies (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 organization
17、s, 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 the IS
18、O/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 the m
19、ember 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 4920 was prepared by Technical Committee ISO/TC 38, Textiles, Subcommi
20、ttee SC 2, Cleansing, finishing and water resistance tests.This second edition cancels and replaces the first edition (ISO 4920:1981), which has been technically revised with the addition of tolerances to Clause 5 and figures, further clarification of Clause 8 procedures, and the replacement of Figu
21、re 3 in the original annex by Figure A.1, Spray chart. ISO 2012 All rights reserved iiiBS EN ISO 4920:2012BS EN ISO 4920:2012Textile fabrics Determination of resistance to surface wetting (spray test)1 ScopeThis International Standard specifies a spray test method for determining the resistance of a
22、ny fabric, which might or might not have been given a water-resistant or water-repellent finish, to surface wetting by water.It is not intended for use in predicting the rain-penetration resistance of fabrics, since it does not measure penetration of water through the fabric.2 Normative referencesTh
23、e 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 139, Textiles Standard atmospheres for condition
24、ing and testing3 Terms and definitionsFor the purposes of this document, the following terms and definitions apply.3.1spray ratingmeasure of the resistance of the surface of a fabric to wetting3.2facefabric surface that is intended to be the outer visible side in an end product4 PrincipleA specified
25、 volume of distilled or fully deionized water is sprayed on a test specimen that has been mounted on a ring and placed at an angle of 45 so that the centre of the specimen is at a specified distance below the spray nozzle. The spray rating is determined by comparing the appearance of the specimen wi
26、th descriptive standards and photographs.5 Apparatus and materials5.1 Spray device1), consisting of a funnel of (150 5) mm diameter held vertically, with a metal nozzle (5.2) connected to the end of the stem by rubber tubing of 10 mm bore (see Figure 1).The distance from the top of the funnel to the
27、 bottom of the nozzle is (195 10) mm.1) A similar test method unit consisting of hoop, nozzle, funnel, stand and spray test rating chart is available from the American Association of Textile Chemists and Colorists (AATCC), PO Box 12215, Research Triangle Park, NC 27709-2215 (USA); tel: +1.919.549.81
28、41; fax: +1.919.549-8933; email: ordersaatcc.org. This information is given for the convenience of users of this document and does not constitute an endorsement by ISO.INTERNATIONAL STANDARD ISO 4920:2012(E) ISO 2012 All rights reserved 1BS EN ISO 4920:2012ISO 4920:2012(E)5.2 Metal spray nozzle2), h
29、aving a convex face with 19 holes of (0,86 0,05) mm diameter (see Figure 2).The holes are distributed over the face of the nozzle. The duration of flow for the specified volume of (250 2) ml of water poured into the funnel shall be between 25 s and 30 s.5.3 Specimen holder, consisting of two wood or
30、 metal rings, which fit into each other, one of inside diameter (155 5) mm and another of outside diameter (155 5) mm (for example an embroidery hoop), into which the specimen can be secured (see Figure 1).The rings should, when in position for a test, rest on a suitable support so that it is inclin
31、ed at an angle of 45 with the centre of the test area (150 2) mm below the centre of the face of the spray nozzle.5.4 Water, distilled or fully deionized, at (20 2) C or (27 2) C, or other temperatures, as agreed between interested parties.The temperatures used shall be stated in the test report 10
32、c)5.5 Graduated cylinder, 250 ml, class B.6 Conditioning and testing atmospheresConditioning and testing shall be carried out according to ISO 139. If so agreed, conditioning and testing may be carried out in the ambient atmosphere.7 Test specimensTake at least three test specimens, each at least 18
33、0 mm square, from different places in the fabric so that they represent the material as fully as possible and can be secured by the specimen holder (5.3). Do not take test specimens from places with creases or fold marks.8 Procedure8.1 Condition the test specimens for at least 4 h in the atmosphere
34、defined in Clause 6.8.2 After conditioning, mount the test specimen securely on the specimen holder (5.3) with the face of the fabric uppermost on the hoop support. Place the holder on the support as specified in 5.3. Unless otherwise stated in the material specification, the specimen shall be orien
35、tated so that the warp, or length, direction is parallel to the flow of water down the specimen.8.3 Pour (250 2) ml of water (5.4) into the funnel (see 5.1) quickly, but steadily so that the spraying shall be continuous once it has commenced. The duration of flow shall be between 25 s and 30 s.8.4 I
36、mmediately after the spray has ceased, remove the holder with its specimen. Hold the specimen holder (5.3) by the bottom edge, with the plane of the fabric almost horizontal and the fabric face down. Tap the holder smartly against a solid object with the fabric facing the object. Rotate the specimen
37、 holder 180 and tap it smartly once more.8.5 Immediately after tapping, with the specimen still on the holder, rate the degree of wetting of the face of the specimen only, according to Clause 9.8.6 Repeat steps 8.1 through 8.5 for all specimens.2) Suitable metal nozzles are available commercially. D
38、etails can be obtained from the ISO Central Secretariat or from the Secretariat of ISO/TC 38/SC 2.2 ISO 2012 All rights reservedBS EN ISO 4920:2012ISO 4920:2012(E)9 Evaluation9.1 Assign a rating to each test specimen which best corresponds to the degree of wetting as described in the spray rating sc
39、ale (9.2) or the photographic spray rating standard scale (see Annex A and Figure A.1). Intermediate ratings can be used in increments of 0,5 for a rating corresponding to ISO 1 or AATCC 50, or higher.Photographic standards are not entirely satisfactory for dark-coloured fabrics, for which more reli
40、ance should be placed on verbal descriptions.9.2 The spray rating scale is defined as follows:0 Complete wetting of the entire face of the specimen;1 Complete wetting of the entire specimen face beyond the spray points;2 Partial wetting of the specimen face beyond the spray points;3 Wetting of speci
41、men face at spray points;4 Slight random sticking or wetting of the specimen face;5 No sticking or wetting of the specimen face.10 Test reportThe test report shall include the following information:a) a reference to this International Standard;b) atmosphere used;c) temperature of the water;d) spray
42、rating for each specimen tested.e) all data needed to identify the sample(s) tested;f) any deviation from the procedure specified. ISO 2012 All rights reserved 3BS EN ISO 4920:2012ISO 4920:2012(E)Dimensions in millimetres unless otherwise indicated21345678195 10Key1 funnel2 ring support3 rubber tubi
43、ng4 spray nozzle5 stand6 specimen7 specimen holder8 supportFigure 1 Apparatus for spray test4 ISO 2012 All rights reservedBS EN ISO 4920:2012ISO 4920:2012(E)Dimensions in millimetres32(8,8 0,25)491123r=Key1 12 holes (0,86 0,05) on a circle (21 0,5)2 6 holes (0,86 0,05) on a circle (10 0,5)3 1 hole (
44、0,86 0,05) on centreFigure 2 Spray nozzle details ISO 2012 All rights reserved 5BS EN ISO 4920:2012ISO 4920:2012(E)Annex A (normative) ISO photographic scaleThe ISO descriptive rating scale corresponds to the AATCC photographic scale3)as follows:ISO 0 = AATCC 0, ISO 1 = AATCC 50, ISO 2 = AATCC 70, I
45、SO 3 = AATCC 80, ISO 4 = AATCC 90, ISO 5 = AATCC 100100 no sticking or wetting of the specimen90 slight random sticking or wetting of the specimen face80 wetting of specimen face at spray points70 partial wetting of the specimen face beyond the spray points50 complete wetting of the entire specimen
46、face beyond the spray points0 complete wetting of the entire face of the specimenColoured water used for photographic effectFigure A.1 ISO spray test rating chart based on the AATCC photographic scale3) A similar test method unit consisting of hoop, nozzle, funnel, stand and spray test rating chart
47、is available from the American Association of Textile Chemists and Colorists (AATCC), PO Box 12215, Research Triangle Park, NC 27709-2215 (USA); tel: +1.919.549.8141; fax: +1.919.549-8933; email: ordersaatcc.org. This information is given for the convenience of users of this document and does not co
48、nstitute an endorsement by ISO.6 ISO 2012 All rights reservedBS EN ISO 4920:2012ISO 4920:2012(E)Bibliography1 ISO 3696, Water for analytical laboratory use Specification and test methods2 AATCC Test Method 22, Water Repellency: Spray Test ISO 2012 All rights reserved 7This page deliberately left bla
49、nkThis page deliberately left blankBSI is the independent national body responsible for preparing British Standards and other standards-related publications, information and services. It presents the UK view on standards in Europe and at the international level. BSI is incorporated by Royal Charter. British Standards and other standardisation products are published by BSI Standards Limited.British Standards Institution (BSI)raising standards worldwideBSI389 Chiswick High Road L
