1、 CAN/CGSB-4.2 No. 25.1-97 Supersedes CAN/CGSB-4.2 No. 25.1-M90 Reaffirmed November 2013 National Standard of Canada ICS 59.080.01 Textile test methods Dimensional change in wetting The CANADIAN GENERAL STANDARDS BOARD (CGSB), under whose auspices this standard has been developed, is a government age
2、ncy within Public Works and Government Services Canada. CGSB is engaged in the production of voluntary standards in a wide range of subject areas through the media of standards committees and the consensus process. The standards committees are composed of representatives of relevant interests includ
3、ing producers, consumers and other users, retailers, governments, educational institutions, technical, professional and trade societies, and research and testing organizations. Any given standard is developed on the consensus of views expressed by such representatives. CGSB has been accredited by th
4、e Standards Council of Canada as a national standards-development organization. The standards that it develops and offers as National Standards of Canada conform to the criteria and procedures established for this purpose by the Standards Council of Canada. In addition to standards it publishes as N
5、ational Standards of Canada, CGSB produces standards to meet particular needs, in response to requests from a variety of sources in both the public and private sectors. Both CGSB standards and CGSB national standards are developed in conformance with the policies described in the CGSB Policy and Pro
6、cedures Manual for the Development and Maintenance of Standards. CGSB standards are subject to review and revision to ensure that they keep abreast of technological progress. CGSB will initiate the review of this standard within five years of the date of publication. Suggestions for their improvemen
7、t, which are always welcome, should be brought to the notice of the standards committees concerned. Changes to standards are issued either as separate amendment sheets or in new editions of standards. An up-to-date listing of CGSB standards, including details on latest issues and amendments, and ord
8、ering instructions, is found in the CGSB Catalogue at our Web site www.tpsgc-pwgsc.gc.ca/ ongc-cgsb along with more information about CGSB products and services. Although the intended primary application of this standard is stated in its Scope, it is important to note that it remains the responsibil
9、ity of the users of the standard to judge its suitability for their particular purpose. The testing and evaluation of a product against this standard may require the use of materials and/or equipment that could be hazardous. This document does not purport to address all the safety aspects associated
10、 with its use. Anyone using this standard 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. CGSB neither assumes nor accepts any responsibility for any in
11、jury or damage that may occur during or as the result of tests, wherever performed. Attention is drawn to the possibility that some of the elements of this Canadian standard may be the subject of patent rights. CGSB shall not be held responsible for identifying any or all such patent rights. Users o
12、f this standard are expressly advised that determination of the validity of any such patent rights is entirely their own responsibility. Further information on CGSB and its services and standards may be obtained from: The Manager Standards Division Canadian General Standards Board Gatineau, Canada K
13、1A 1G6 The Standards Council of Canada (SCC) is the coordinating body of the Canadian standardization network, which is composed of people and organizations involved in the development, promotion and implementation of standards. Through the collaborative efforts of Canadian standardization network m
14、embers, standardization is helping to advance the social and economic well-being of Canada and to safeguard the health and safety of Canadians. The networks efforts are overseen by SCC. The principal objectives of SCC are to foster and promote voluntary standardization as a means of advancing the na
15、tional economy, supporting sustainable development, benefiting the health, safety and welfare of workers and the public, assisting and protecting the consumer, facilitating domestic and international trade, and furthering international cooperation in relation to standardization. An important facet o
16、f the Canadian standards development system is the use of the following principles: consensus; equal access and effective participation by concerned interests; respect for diverse interests and identification of those who should be afforded access to provide the needed balance of interests; mechanis
17、m for dispute resolution; openness and transparency; open access by interested parties to the procedures guiding the standards development process; clarity with respect to the processes; and Canadian interest consideration as the initial basis for the development of standards. A National Standard of
18、 Canada (NSC) is a standard prepared or reviewed by an SCC-accredited SDO and approved by the SCC according to NSC approval requirements. Approval does not refer to the technical content of the standard, as this remains the responsibility of the SDO. An NSC reflects a consensus of a number of capabl
19、e individuals whose collective interests provide, to the greatest practicable extent, a balance of representation of general interests, producers, regulators, users (including consumers) and others with relevant interests, as may be appropriate to the subject at hand. NSCs are intended to make a sig
20、nificant and timely contribution to the Canadian interest. Those who have a need to apply standards are encouraged to use NSCs. These standards are subject to periodic review. Users of NSCs are cautioned to obtain the latest edition from the SDO that publishes the standard. The responsibility for ap
21、proving standards as NSCs rests with: Standards Council of Canada 270 Albert Street, Suite 200 Ottawa, Ontario K1P 6N7, CANADA How to order Publications: by telephone 819-956-0425 or 1-800-665-2472 by fax 819-956-5740 by mail CGSB Sales Centre Gatineau, Canada K1A 1G6 in person Place du Portage Phas
22、e III, 6B1 11 Laurier Street Gatineau, Quebec by email ncr.cgsb-ongctpsgc-pwgsc.gc.ca on the Web www.tpsgc-pwgsc.gc.ca/ongc-cgsb NATIONAL STANDARD OF CANADA CAN/CGSB-4.2 No. 25.1-97 Supersedes CAN/CGSB-4.2 No. 25.1-M90 Reaffirmed November 2013 Textile test methods Dimensional change in wetting CETTE
23、 NORME NATIONALE DU CANADA EST DISPONIBLE EN VERSIONS FRANAISE ET ANGLAISE. Published September 1997 by the Canadian General Standards Board Gatineau, Canada K1A 1G6 Minister of Public Works and Government Services Canada 1997 No part of this publication may be reproduced in any form without the pri
24、or permission of the publisher. Prepared by the Canadian General Standards Board Approved by the CAN/CGSB-4.2 No. 25.1-97 CGSB 2013 All rights reserved CANADIAN GENERAL STANDARDS BOARD Committee on Textile Test Methods and Terminology (Voting membership at date of reaffirmation) General interest cat
25、egory Batcheller, J. University of Alberta Carrick, D. Consultant Davie, N. Consultant Liu, S. University of Manitoba Man, T.M. Consultant Tait, C. National Defence/DSSPM Producer category Adam, C. Tencate Protective Fabrics Canada Boivin, D. E.I. DuPont Co. Lawson, L. Davey Textile Solutions Leblan
26、c, J.-M. Marv Holland Apparel Ltd. Schumann, E. Lincoln Fabrics Ltd. Taylor, V. Invista (Canada) Co. Regulator category Andersson, C. Health Canada User category Bourget, S. National Defence/QETE DEntremont, E. Royal Canadian Mounted Police Izquierdo, V. Textile Technologies Centre Kohli, G. Sears C
27、anada Inc. Larsen, A.-L. Exova Group Ltd. Litva, M. Canada Border Services Agency MacLeod, J. Public Works and Government Services Canada Tebbs, C. International Drycleaners Congress Secretary (non-voting) Grabowski, M. Canadian General Standards Board Acknowledgment is made for the translation of t
28、his National Standard of Canada by the Translation Bureau of Public Works and Government Services Canada. CGSB 2013 All rights reserved i CAN/CGSB-4.2 No. 25.1-97 Supersedes CAN/CGSB-4.2 No. 25.1-M90 Reaffirmed November 2013 Preface to the National Standard of Canada This National Standard of Canada
29、 has been reaffirmed by the CGSB Committee on Textile Test Methods and Terminology. Editorial changes have been made by the correction of the following paragraph: 8.1 The publications referred to in par. 3.1.1 may be obtained from the Canadian General Standards Board, Sales Centre, Gatineau, Canada
30、K1A 1G6. Telephone 819-956-0425 or 1-800-665-2472. Fax 819-956-5740. E-mail ncr.cgsb-ongctpsgc-pwgsc.gc.ca. Web site www.tpsgc-pwgsc.gc.ca/ongc-cgsb.Supersedes CAN/CGSB-4.2No. 25.1-M90Reaffirmed1RYember 20134. 4.1 4.2 4.3 4.4 4.5 4.6 4.7 4.8 5. APPARATUS AND REAGENTS Template: for marking out distan
31、ces on specimen. Steel tape measure or ruler: graduated in millimetres. Container: at least 380 x 380 x 25 mm deep. Neutral nonionic wetting agent.2 Hydroextractor, blotting paper or other absorbent material. Smooth flat surface: for drying specimens. Hot-head flat-bed press, hand iron and ironing b
32、oard, or steam press: in accordance with CANICGSB-4.2 No. 33. Tension presser: in accordance with CANICGSB-4.2 No. 33. TEST SPECIMENS 5.1 Cut two specimens3 each at least 350 x 350 mm and having different warp and weft yarns (or different wales and courses) from an area of the fabric that is free fr
33、om wrinkles and creases. Condition the specimens in accordance with CANICGSB-4.2 No. 2 and place them on a flat surface. Using a permanent marking medium (e.g. indelible ink, sewing thread), mark on each specimen three accurately measured distances of at least 250 mm, parallel to the warp, wales or
34、machine direction, and three parallel to the weft, courses or cross direction. The three marked distances shall be at least 100 mm apart, and no portion of them shall be closer than 50 mm to the specimen edges. 5.2 When tension pressing is required, prepare the specimens according to CANICGSB-4.2 No
35、. 33. 6. PROCEDURE 6.1 With Tensionless Pressing 6.1.1 Immerse the specimens for at least 1 h in water at 25 to 30C to which has been added 0.5 g/L of a neutral nonionic wetting agent to facilitate rapid wetting-out of the fabric. Gather each specimen separately into a ball to prevent distortion in
36、handling, remove it from the soaking bath and transfer it to the hydroextractor, placing it against the wall of the extractor basket. Where a large number of specimens are being processed together, transfer each one separately and place it as close as possible to the wall, to prevent entanglement an
37、d distortional strains during centrifuging. Centrifuge for 10 s at full speed or until the flow of water from the extractor has markedly decreased. Carefully remove each specimen and spread without tension or distortion on a smooth flat surface. Allow the specimen to dry at room temperature. As an a
38、lternative to Centrifuging, the specimen may be laid on a smooth flat surface, excess moisture removed by blotting, and the specimen allowed to dry at room temperature. 6.1.2 6.1.3 Pressing - Except where pressing is excluded (e.g. by a specification, label or the nature of the material), press the
39、specimen according to CANICGSB-4.2 No. 33 using a procedure suitable for the type of fabric. 6.1.4 Place the specimen on a flat surface and condition it in accordance with CANICGSB-4.2 No. 2 for at least 4 h. 6.1.5 Remeasure the marked distances. Triton-XI00 has been found suitable for this purpose
40、and is available from Fisher Scientific Ltd., 112 Colonnade Road, Nepean, Ontario K2E 7L6, telephone 1-800-234-7437, and from Union Carbide Canada Lid . 7400, Les Galeries dAnjou Boulevard., Suite 360, Anjou, Montreal, Quebec HIM 3M2, telephone 1-800-361-4227. If the precision with which the dimensi
41、onal change in wetting to be determined is specified, refer to CANICGSB-4.2 No. I to determine the nuniber of test specimens required. If this is not known, at least two specimens shall be tested. 2 NO. 25.1-97 6.1.6 6.1.7 6.2 6.2.1 6.2.2 6.2.3 6.2.4 6.2.5 7. 7.1 7.2 7.3 8. 8.1 Calculate the average
42、 dimensional change, for each direction of the fabric separately, as a percentage of the original measurement to the nearest 0.1%. Average the results for the two specimens. Restorability by Tension Pressing If after the tensionless pressing procedures (par. 6.1) excessive shrinkage is found in one
43、or both directions of the fabric, the specimen shall, if required, be subjected to tension pressing according to CANICGSB-4.2 No. 33. Place the specimen on a flat surface and condition it in accordance with CANKGSB-4.2 No. 2 for at least 4 h. Remeasure the marked distances. Calculate the average dim
44、ensional change, for each direction of the fabric separately, as a percentage of the original measurement (i.e. before wetting) to the nearest O. 1 %. Average the results for the two specimens. REPORT Report the following information: The average percent dimensional change, after tensionless pressin
45、g, for each direction of the fabric separately, to the nearest 0.1%, using a negative sign for shrinkage and a plus sign for stretch. If applicable, the percent dimensional change after tension pressing, for each direction of the fabric separately, to the nearest O. 1 %. The number and date of issue of this method (including amendments). NOTES The publications referred to in par. 3.1.1 may be obtained from the Canadian General Standards Board, Sales Centre, Ottawa, Canada K1A 1G6. Telephone (819) 956-0425 or 1-800-665-CGSB (Canada only). Fax (819) 956-5644. NO. 25.1-97 3
