1、 CAN/CGSB-4.2 No. 27.6-2015Supersedes CAN/CGSB-4.2 No. 27.6-M91Textile test methodsFlame resistance Methenamine tablet test for textile floor coveringsICS 59.080.30National Standard of CanadaThe CANADIAN GENERAL STANDARDS BOARD (CGSB), under whose auspices this standard has been developed, is a gove
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24、, Suite 600 Ottawa, Ontario K1P 6L5, CANADA index-eng.html/ NATIONAL STANDARD OF CANADA CAN/CGSB-4.2 No. 27.6-2015Supersedes CAN/CGSB-4.2 No. 27.6-M91Textile test methodsFlame resistance Methenamine tablet test for textile floor coveringsPrepared by Approved byCanadian General Standards BoardPublish
25、ed September 2015 by the Canadian General Standards Board Gatineau, Canada K1A 1G6 HER MAJESTY THE QUEEN IN RIGHT OF CANADA, as represented by the Minister of Public Works and Government Services, the Minister responsible for the Canadian General Standards Board (2015). No part of this publication m
26、ay be reproduced in any form without the prior permission of the publisher.CETTE NORME NATIONALE DU CANADA EST DISPONIBLE EN VERSIONSFRANAISE ET ANGLAISE.CAN/CGSB-4.2 No. 27.6-2015CANADIAN GENERAL STANDARDS BOARDCommittee on Textile Test Methods and Terminology(Voting membership at date of approval)
27、ChairDavie, N.1ConsultantGeneral interest categoryBatcheller, J. University of AlbertaCarrick, D. ConsultantHorne, L. University of ManitobaMan, T.M. ConsultantSchumann, E. ConsultantTait, C. National Defence/DSSPMProducer categoryAdam, C. Tencate Protective Fabrics Lankin, G. LAC-MAC LimitedLawson,
28、 L. Davey Textile SolutionsONeill, B. London Hospital Linen Service Inc.Orzel, A. Lincoln Fabrics Ltd.Taylor, V. Invista (Canada) Co.Regulator categoryKorpan, M. Health Canada, CPSD Risk Management BureauSzabo, J. Industry CanadaUser categoryAndersson, C. Health Canada, CPSD Risk Assessment BureauBo
29、wie, K. Public Works and Government Services CanadaDEntremont, E. Royal Canadian Mounted PoliceIzquierdo, V. Textile Technologies CentreLitva, M. Canada Border Services AgencySmith, I. Exova Group Ltd.Tebbs, C. International Drycleaners CongressZhao, J. National Defence/QETESecretary (non-voting)Gra
30、bowski, M. Canadian General Standards Board1 General interestAcknowledgment is made for the translation of this National Standard of Canada by the Translation Bureau of Public Works and Government Services Canada. CGSB 2015 All rights reservedCAN/CGSB-4.2 No. 27.6-2015i CGSB 2015 All rights reserved
31、PageContents1 Scope . 12 Principle 13 Normative references . 14 Apparatus and reagents . 25 Test specimens . 36 Procedure 37 Report 41CAN/CGSB-4.2 No. 27.6-2015Supersedes CAN/CGSB-4.2 No. 27.6-M91 CGSB 2015 All rights reservedTextile test methodsFlame resistance Methenamine tablet test for textile f
32、loor coverings1 ScopeThis method determines the flammability of finished textile floor covering materials when exposed to an ignition source (methenamine tablet) under specified conditions.This method is applicable to all types of textile floor coverings, regardless of fibre type or method of constr
33、uction.This method describes the testing of a single specimen and is to be used in conjunction with a statistically valid sampling plan.The testing and evaluation of a product against this method may require the use of materials and/or equipment that could be hazardous. This document does not purpor
34、t to address all the safety aspects associated with its use. Anyone using this method has the responsibility to consult the appropriate authorities and to establish appropriate health and safety practices in conjunction with any applicable regulatory requirements prior to its use.2 PrincipleA specim
35、en of the finished textile floor covering is conditioned, dried, brought to room temperature, and placed horizontally in a test chamber in a draft-free environment. A methenamine tablet is placed in the centre of the specimen, ignited, and the shortest distance between the charred area of the floor
36、covering and the inside edge of the specified frame is measured.3 Normative referencesThe following normative document contains provisions that, through reference in this text, constitute provisions of this method. The referenced document may be obtained from the source noted below.NOTE The address
37、provided below was valid at the date of publication of this method.An undated reference is to the latest edition or revision of the reference or document in question, unless otherwise specified by the authority applying this method. A dated reference is to the specified revision or edition of the re
38、ference or document in question. 3.1 Canadian General Standards Board (CGSB)CAN/CGSB-4.2 Textile test methods:No. 2 Conditioning textile materials for testing.3.1.1 SourceThe above may be obtained from the Canadian General Standards Board, Sales Centre, Gatineau, Canada K1A 1G6. Telephone 819-956-04
39、25 or 1-800-665-2472. Fax 819-956-5740. Email ncr.cgsb-ongctpsgc-pwgsc.gc.ca. Web site www.tpsgc-pwgsc.gc.ca/ongc-cgsb/index-eng.html.2CAN/CGSB-4.2 No. 27.6-2015 CGSB 2015 All rights reserved4 Apparatus and reagents 4.1 Test chamber: a box, made from hard, fire-resistant insulation board at least 6
40、mm thick with similar thermal properties as inorganic-cement board, open at the top with all joints tightly sealed, with inside dimensions of 300 mm 10 mm x 300 mm 10 mm x 300 mm 10 mm. A mirror mounted at an angle above the test chamber will assist in viewing the test specimen.4.2 Secondary floor:
41、a rigid, removable, hard, fire-resistant insulation board made of the same material as the test chamber, and measuring approximately 280 mm x 280 mm x 3 mm to fit the inside bottom of the test chamber.4.3 Frame: a steel plate, 230 mm 5 mm x 230 mm 5 mm x 6 mm 1 mm, with a 203 mm 0.5 mm diameter hole
42、 in the centre.4.4 Centring device: an instrument used to centre the methenamine tablet on the specimen.NOTE A half-circle template fitting the diameter of the frame with a half-circle hole of approximately 7 mm diameter at the centre of the base may be used (see Figure 1).Figure 1 Example of a cent
43、ring device4.5 Methenamine timed burning tablet2: a white, round, bevelled tablet with a nominal diameter of 6.35 mm, a weight of 149 mg 5 mg and a burning time of 130 s 13 s. The tablet shall be stored in a desiccator over a desiccant for at least 24 h prior to use, to prevent cracking on ignition.
44、 The tablet shall be handled only by mechanical means.NOTE The burning time of the tablet is the duration of the flaming when the tablet is tested on a metal burn plate under standard laboratory conditions in a draft-free environment.4.6 Desiccator: a cabinet with shelves capable of holding 230 mm x
45、 230 mm specimens separately in a horizontal position. 4.7 Desiccant: anhydrous magnesium perchlorate or equally effective dehydrating agent.4.8 Laboratory drying oven: an oven with a forced draft capable of maintaining a temperature of 105C 2C.4.9 Glove: nonhygroscopic, made of polyethylene.4.10 St
46、eel rule: graduated in millimetres.4.11 Vacuum cleaner: household, with dust brush attachment.4.12 Ignition source: match or lighter.2 A tablet that conforms to these specifications is available from Vesta Pharmaceuticals, Inc., 5767 Thunderbird Road, Indianapolis, IN 46236, U.S.A. Telephone 317-895
47、-9000. Website http:/ No. 27.6-20153 CGSB 2015 All rights reserved5 Test specimens5.1 Cut specimens to a minimum of 230 mm x 230 mm, ensuring they are free from creases, delamination, or other distortion. The number of specimens to be tested shall be based on a statistically valid sampling plan.NOTE
48、 CAN/CGSB-4.155 represents a statistically valid sampling plan consisting of a minimum of ten specimens.5.2 Use the vacuum cleaner to ensure the surface is free of lint, loose yarns, fibres, etc.6 Procedure6.1 Condition the specimen in accordance with CAN/CGSB-4.2 No. 2.NOTE Standard conditioning be
49、fore drying is specified because storage conditions may cause some materials to be moist, and thus require considerably more than 2 h of drying time.6.2 Place the conditioned specimen in an oven at 105C 2C for 2 h 5 min, ensuring free access of air on all sides.6.3 Remove the specimen from the oven and immediately place it in the desiccator with the desiccant for a minimum of 1 h or until it reaches room temperature, ensuring that the specimen is horizontal with the pil
