1、Designation: D5278 09D5278 09 (Reapproved 2013)Standard Test Method forElongation of Narrow Elastic Fabrics (Static-Load Testing)1This standard is issued under the fixed designation D5278; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revi
2、sion, the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope1.1 This test method determines the elongation characteristics of narrow elastic fabrics made from natur
3、al or man-madeelastomers, either alone or in combination with other textile fibers, when tested with a static load testing procedure before or afterlaundering.NOTE 1For determination of similar characteristics using the constant-rate-of-extension (CRE) type tensile testing machine, refer to Test Met
4、hodD4964.NOTE 2For determination of similar characteristics using the constant-rate-of load (CRL) type tensile testing machine, refer to Test Method D1775.1.2 The use of this test method requires the selection of, or mutual agreement upon, the effective static load at which the testresults will be d
5、etermined.1.3 Laundering procedures used will be those specified in Test Method AATCC 135 for 3 washing and drying cycles.1.4 The values stated in either inch-poundSI units or SIinch-pound units are to be regarded separately as standard. Within thetext, the inch-pound units are shown in brackets. Th
6、e values stated in each system aremay not be exact equivalents; therefore, eachsystem shall be used independently of the other. Combining values from the two systems may result in nonconformancenon-conformance with the specifications.standard.1.5 This standard does not purport to address all of the
7、safety problems, if any, associated with its use. It is the responsibilityof the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatorylimitations prior to use.2. Referenced Documents2.1 ASTM Standards:2D123 Terminology Relating to Te
8、xtilesD1775 Test Method for Tension and Elongation of Wide Elastic Fabrics (Withdrawn 2000)3D1776 Practice for Conditioning and Testing TextilesD4848 Terminology Related to Force, Deformation and Related Properties of TextilesD4850 Terminology Relating to Fabrics and Fabric Test MethodsD4964 Test Me
9、thod for Tension and Elongation of Elastic Fabrics (Constant-Rate-of-Extension Type Tensile Testing Machine)2.2 AATCC Test Method:135 Dimensional Changes in Automatic Home Laundering of Woven and Knit Fabrics43. Terminology3.1 For all terminology relating to D13.59, Fabric Test Methods, General, ref
10、er to Terminology D4850.3.1.1 For all terminology related to Force, Deformation and Related Properties in Textiles see Terminology D4848.3.1.2 The following terms are relevant to this standard: elongation, narrow elastic fabric, static load, in textile testing.3.2 For all other terms related to text
11、iles, see Terminology D123.1 This test method is under the jurisdiction ofASTM Committee D13 on Textiles and is the direct responsibility of Subcommittee D13.59 on Fabric Test Methods, General.Current edition approved Jan. 15, 2009July 1, 2013. Published February 2009September 2013. Originally appro
12、ved in 1992. Last previous edition approved in 20042009as D527898(2004).D527809. DOI: 10.1520/D5278-09.10.1520/D5278-09R13.2 For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at serviceastm.org. For Annual Book of ASTM Standardsvolume information, ref
13、er to the standards Document Summary page on the ASTM website.3 The last approved version of this historical standard is referenced on www.astm.org.4 Available from American Association of Textile Chemists and Colorists (AATCC), P.O. Box 12215, Research Triangle Park, NC 27709, http:/www.aatcc.org.T
14、his document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Becauseit may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior edit
15、ions as appropriate. In all cases only the current versionof the standard as published by ASTM is to be considered the official document.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States14. Summary of Test Method4.1 Conditioned test spe
16、cimens, laundered or unlaundered, are suspended and subjected to a specified loading. The static loadis applied for a specified time, released, and the cycle repeated two more times. The percent elongation is read directly from thescale on the apparatus.5. Significance and Use5.1 This test method is
17、 considered satisfactory for acceptance testing of commercial shipments of narrow elastic fabrics becausethe test method is used in the trade for acceptance testing.5.1.1 In case of a dispute arising from differences in reported test results when using this test method for acceptance testing ofcomme
18、rcial shipments, the parties should conduct comparative tests to determine if there is a statistical bias between theirlaboratories. Competent statistical assistance is recommended for the investigation of bias. As a minimum, the two parties shouldtake a group of test specimens that are as homogeneo
19、us as possible and that are from a lot of material of the type in question. Thetest specimens should then be randomly assigned in equal numbers to each laboratory for testing. The average results from the twolaboratories should be compared using students t-test for unpaired data and an acceptable pr
20、obability level chosen by the twoparties before testing is begun. If bias is found, either the cause must be found and corrected or the purchaser and the supplier mustagree to interpret future test results in the light of the known bias.5.2 This test method specifies the use of a static load apparat
21、us. Users of this test method are cautioned that elongation test dataobtained using this test method are not comparable to elongation test data obtained using either constant-rate-of-extension (CRE)or constant-rate-of-loading (CRL) type tensile testing machines.6. Apparatus6.1 Static Load Test Appar
22、atus, equipped with a vertically mounted, fixed saw-tooth clamp for holding the upper portion of thespecimen, a scale for reading percent elongation, and an unattached weighted saw-tooth clamp for holding the lower portion ofthe specimen.6.2 Static Loads including holder and lower clamp.6.3 Bench Ma
23、rker, for marking 125.0-mm 5.0-in. and 250.0-mm 10-in. distances, with stamp pad.7. Sampling7.1 Lot SampleAs a lot sample for acceptance testing, take at random the number of rolls of fabric as directed in an applicablematerial specification, or other agreement between the purchaser and the supplier
24、. Consider rolls of fabric or boxes of festoonedfabric to be the primary sampling units.7.2 Laboratory SampleAs a laboratory sample for acceptance testing, take a full-width swatch, 2 m 2 yd long, from the endof each packaging unit in the lot sample, after first discarding a minimum of 1 m 1 yd of f
25、abric from the leading end of thepackaging unit.7.3 Test SpecimensTake three test specimens from each swatch in the laboratory sample.8. Test Specimens8.1 Preparation:8.1.1 When samples exceed 75 mm 3 in. use a 75-mm width cut from the center of the piece unless the purchaser and selleragree to a di
26、fferent sample width.8.1.2 Prepare test specimens considered to be high stretch (200 % and above) as follows:8.1.2.1 Cut the test specimens approximately 230 9 in. long with this dimension parallel to the length of the fabric. Unlessthe fabric width exceeds 75 mm 3 in., use the full fabric width as
27、the test specimen width.8.1.2.2 With the bench marker, make two marks on the test specimen that are 125.0 mm 5.0 in. apart, approximately the samedistance from the test specimen ends and perpendicular to the long direction of the test specimen.8.1.3 Prepare test specimens considered to be low stretc
28、h (below 200 %) as follows:8.1.3.1 Cut the test specimens approximately 356 mm 14 in. long with this dimension parallel to the length of the fabric.Unless the fabric width exceeds 75 mm 3 in., use the full fabric width as the test specimen width.8.1.3.2 With the bench marker, make two marks on the t
29、est specimen that are 250 mm 10 in. apart, approximately the samedistance from the test specimen ends and perpendicular to the long direction of the test specimen.9. Conditioning9.1 Condition the laboratory samples as directed in Practice D1776.Allow the samples to relax, free of tension, for a mini
30、mumof 4 h. After this exposure, it may be assumed that moisture equilibrium has been reached.D5278 09 (2013)210. Procedure10.1 Test all test specimens in the standard atmosphere for testing textiles, which is 21 6 1C 70 6 2F and 65 6 2 % relativehumidity.10.2 Mount the test specimen with the upper b
31、ench mark aligned with the teeth on the fixed clamp.10.3 Load the free clamp with the appropriate static load.10.4 Without putting any tension on the test specimen, attach the static-load clamp at the lower bench mark of the test specimen.10.5 Carefully lower the clamp vertically, letting the test s
32、pecimen take up the load gradually. Let the test specimen hang for10 s.10.6 Exercise the test specimen to remove static load by raising the clamp vertically to allow full relaxation of the test specimen,lowering it gently, and letting the test specimen hang for another 10 s.10.7 Repeat 10.6 once mor
33、e.10.8 Read and record the percent of elongation to the nearest 0.1 %.10.9 Repeat the process with the two remaining test specimens.11. Calculation11.1 Calculate the average elongation for each sample, to the nearest 0.1 %.12. Report12.1 State that the test specimens were tested as directed in Test
34、Method D5278. Describe the material(s) or product(s) sampledand the method of sampling used.12.2 Report the following information:12.2.1 The average percent elongation for each sample,12.2.2 The loading used, the benchmark length and the width of the test specimen, and12.2.3 Whether or not the test
35、specimens were laundered.13. Precision and Bias13.1 The interlaboratory tests have been completed and the data analysis is awaiting the ASTM program for precision and biasstatements.14. Keywords14.1 elastic fabric; elongation; static loadASTM International takes no position respecting the validity o
36、f any patent rights asserted in connection with any item mentionedin this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the riskof infringement of such rights, are entirely their own responsibility.This standard is subject to
37、 revision at any time by the responsible technical committee and must be reviewed every five years andif not revised, either reapproved or withdrawn.Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM International Headquarters. Y
38、our comments will receive careful consideration at a meeting of theresponsible technical committee, which you may attend. If you feel that your comments have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards, at the address shown below.This standard is co
39、pyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org). Permission rights to photocopy the standard may also be secured from the ASTM website (www.astm.org/COPYRIGHT/).D5278 09 (2013)3
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