ASTM D3107-2007(2011) Standard Test Methods for Stretch Properties of Fabrics Woven from Stretch Yarns《弹力纱机织物拉伸性能的标准试验方法》.pdf

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1、Designation: D3107 07 (Reapproved 2011)Standard Test Methods forStretch Properties of Fabrics Woven from Stretch Yarns1This standard is issued under the fixed designation D3107; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the y

2、ear 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 These test methods cover the determination of theamount of fabric stretch, fabric growth, and fabric recovery o

3、ffabrics woven in whole or in part from stretch yarns after aspecified tension and extension.1.2 These test methods are intended for use with wovenfabrics exhibiting high stretch (greater than 12 percent) andgood recovery properties from low tension (up to 360 g/cm or2 lb/in. of fabric width). When

4、agreed upon, these test methodscan be used for fabrics woven in whole or in part fromnon-stretch yarns that exhibit limits within the stretch charac-teristics shown above.1.3 These test methods allow the use of two tension optionscommonly used in the textile industry; 1.35 kg (3 lb.) and 1.8kg (4 lb

5、). Several calculations are included for fabric stretch,fabric growth and fabric recovery, and can be used individuallywhen required by individual specifications.1.4 These test methods should not be used to measurebreaking elongation of woven fabrics which is covered in TestMethod D5035.1.5 The valu

6、es stated in either SI units or inch-pound unitsare to be regarded separately as the standard. Within the text,the inch-pound units are shown in parentheses. The valuesstated in each system are not exact equivalents; therefore, eachsystem shall be used independently of the other. Combiningvalues fro

7、m the two systems may result in nonconformancewith the specification.1.6 This standard does not purport to address all of thesafety concerns, if any, associated with its use. It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the

8、applica-bility of regulatory limitations prior to use.2. Referenced Documents2.1 ASTM Standards:2D123 Terminology Relating to TextilesD1776 Practice for Conditioning and Testing TextilesD2904 Practice for Interlaboratory Testing of a Textile TestMethod that Produces Normally Distributed DataD2906 Pr

9、actice for Statements on Precision and Bias forTextiles3D4848 Terminology Related to Force, Deformation andRelated Properties of TextilesD4849 Terminology Related to Yarns and FibersD4850 Terminology Relating to Fabrics and Fabric TestMethodsD5035 Test Method for Breaking Force and Elongation ofText

10、ile Fabrics (Strip Method)3. Terminology3.1 For all terminology related to Fabric, refer to Terminol-ogy D4850.3.2 For all terminology related to Yarns and Fiber, refer toTerminology D4849.3.3 For all terminology related to Force, Deformation andRelated Properties of Textiles, refer to Terminology D

11、48483.3.1 The following terms are relevant to this standard:bench marks, fabric stretch, fabric growth, stretch yarn, tension3.4 For all other terminology related to textiles, refer toTerminology D123.4. Summary of Test Methods4.1 Fabric Stretch under a Specified TensionBench marksof a known distanc

12、e are made on a fabric specimen.Aspecifiedtension is applied to a fabric specimen by a prescribed1These test methods are under the jurisdiction of ASTM Committee D13 onTextiles and is the direct responsibility of Subcommittee D13.59 on Fabric TestMethods, General. Current edition approved May 1, 201

13、1. Published June 2011.Originally approved in 1975 as D310775. Discontinued September 1999 andreinstated in 2003 as D310703. Last previous edition approved in 2007 asD3107071. DOI: 10.1520/D3107-07R11.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Servi

14、ce at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.3Withdrawn. The last approved version of this historical standard is referencedon www.astm.org.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700

15、, West Conshohocken, PA 19428-2959, United States.technique and the resulting distance between bench markswhile the specimen is under the tension is measured. The fabricstretch is calculated from the length difference between benchmarks prior to application of the tension and while under thetension.

16、4.2 Fabric Growth after a Specified TensionBench marksof a known distance are made on a fabric specimen.Aspecifiedtension is applied to a fabric specimen by a prescribedtechnique. The tension is removed and after various timeintervals, the relaxed distance between the bench marks isremeasured. The f

17、abric growth is calculated from the lengthdifference between the bench marks prior to application of thetension and after relaxation.4.3 Fabric Growth after Stretching to a SpecifiedExtensionBench marks of a known distance are made on afabric specimen. A specimen, paired to one used in the fabricstr

18、etch test, is held at a specified extension for a prescribedperiod of time. The tension is then removed from the specimenand the distance between the bench marks is measured after thespecimen has been allowed to relax for various time intervals.The fabric growth at each time interval is calculated f

19、rom thedistance between the bench marks of the specimen prior tostretching and the length after each relaxation period at zerotension.4.4 Fabric Recoveryfabric recovery is calculated as thepercentage of the fabric growth recovered with respect to thefabric growth determined after tension and/or afte

20、r a specifiedextension obtained at the various relaxation intervals.5. Significance and Use5.1 these test methods are used to determine the stretch,growth and recovery properties that garments made with thefabric tested may be expected to exhibit during use.5.2 these test methods is not recommended

21、for acceptancetesting of commercial shipments because the between-laboratory precision is known to be poor.5.2.1 If there are differences of practical significance be-tween reported test results for two or more laboratories,comparative tests should be performed by those laboratories todetermine if t

22、here is a statistical bias between them, usingcompetent statistical assistance. Use test samples that are ashomogeneous as possible, are drawn from the material fromwhich the disparate test results were obtained, and are ran-domly assigned in equal numbers to each laboratory for testing.The test res

23、ults from the two laboratories should be comparedusing a statistical test for unpaired data, at a probability levelchosen prior to the testing series. If a bias is found, either itscause must be found and corrected, or future test results for thatmaterial must be adjusted in consideration of the kno

24、wn bias.5.3 Some stretch fabrics are constructed with stretch yarnsin only the filling direction. Consequently, for those fabrics,only the filling direction needs to be tested.6. Apparatus6.1 Stretch Testing Instrument4consisting of the following:6.1.1 Frame or Board with a fixed clamp at the top.6.

25、1.2 Separate Clamp, or other means of attaching a weightwith a known mass to the bottom of the test specimen.6.1.3 Dowel Pin, or equivalent, approximately 6 mm (14in.) diameter6.1.4 Scale, to measure the span of bench marks on thespecimen graduated either in units of percent of original gagelength o

26、r 1 mm (0.5 in) 6 0.1 %.6.1.5 Locking Mechanism, for the bottom clamp to maintainspecimen extension.6.2 Tensioning Weights, for each position, with an attachedhook, when combined with the clamp described in 6.1.2 andthe dowel pin described in 6.1.3 provides a total mass of 1.8 kg(4 lb) for option 1

27、or 1.35 kg (3 lb) for option 2, each havingtolerances of (6 1 %).6.3 Sanforized Marker or equivalent, to make the benchmarks.6.4 Timer, with increments of at least 10 s.7. Sampling and Test Specimens7.1 Lot SampleAs a lot sample for acceptance testing,take a random number of shipping units directed

28、in a applicablematerial specification or other agreement between the pur-chaser and the supplier. Consider rolls of fabric or fabriccomponents of fabricated systems to be the primary samplingunit, as applicable.NOTE 1An adequate specification or other agreement between thepurchaser and the supplier

29、requires taking into account the variabilitybetween shipping units, between packages within a shipping unit, andbetween specimens from a single package to provide a sampling with ameaningful producers risk, consumers risk, acceptable quality level andlimiting quality level.7.2 Laboratory Sampling Un

30、itAs a laboratory samplingunit take from rolls at least one full-width piece of fabric thatis1m(1yd)inlength along the selvage (machine direction),after removing a first1m(1yd)length. For fabric componentsof fabricated systems use the entire system.7.3 Test Specimens and PreparationFrom each laborat

31、orysampling unit, take three pairs of test specimens 65 by 560 mm(2.5 by 22 in.) with the long direction parallel to the testdirection. Take specimens representing a broad distributionfrom different positions diagonally across the width of thelaboratory sampling unit. Label to maintain specimen iden

32、tity.7.3.1 When an end -use product or garment is provided, takespecimens from different areas. That is, if the product is agarment worn on the upper body, if possible, take specimensfrom the shoulder, shirt tail, shirt back and front, and sleeve. Insome cases, the size of the specimen panels may no

33、t alwaysallow taking 560 mm (22 in.) long specimens in the testdirection.7.3.2 For fabric widths 125 mm (5 in.) or more, take nospecimen closer than 25 mm (1 in.) from the selvage edges ofthe laboratory sampling unit.7.3.3 For fabric widths less than 125 mm (5 in.), use theentire width of the labora

34、tory sampling unit for specimens.7.3.4 Ensure specimens are free of folds, creases, orwrinkles.Avoid getting oil, water, grease, etc. on the specimenswhen handling.7.3.5 If the fabric has a pattern, ensure that the specimensare a representative sampling of the pattern.4Apparatus is commercially avai

35、lable.D3107 07 (2011)27.3.6 Ravel the specimens to a width of 50 6 1 mm (2.00 60.05 in.) taking approximately the same number of yarns fromeach side of the specimen.7.3.7 Fold one end of the specimen 32 mm (1.25 in.) andstitch a seam approximately 25 mm (1 in.) from the fold.7.3.8 Cut a slit approxi

36、mately 10 mm (38 in.) long in thecenter of the strip on the fold.7.3.9 Lay the specimen on a smooth flat surface and allowto relax for 30 minutes.8. Conditioning8.1 Bring the test specimens to moisture equilibrium fortesting in the standard atmosphere for testing textiles asdirected in Practice D177

37、6 or, if applicable, in the specifiedatmosphere in which the testing is to be performed.9. Preparation of Test Apparatus and Calibration9.1 Verify measuring scales and tension weights are withincalibration.10. Procedure10.1 Test the test specimens in the standard atmosphere fortesting textiles, as d

38、escribed in Practice D1776. Handle the testspecimens carefully to avoid altering the natural state of thematerial.10.2 Place bench marks at least 250 6 1mm(106 0.05 in.)apart in the center of the specimen.10.3 Fabric Stretch after applying a Specified Tension:10.3.1 Select the tension option (1) 1.8

39、 kg (4.0 lb) or (2)1.35 kg (3 lb) as directed in a material specification or contractorder. In the absence of a material specification or contractorder use option 1.10.3.2 Clamp the end of one specimen in the top clamp ofthe stretch tester so that the folded and sewn loop end hangsfreely.10.3.3 Meas

40、ure and record the distance between the benchmarks to the nearest 1 % or 1 mm (0.05 in.) and record asDistance O1(original before tension is applied).10.3.4 Insert a dowel pin, or equivalent, through the loopand place the tension weight hook through the slit in the foldand over the dowel pin, thereb

41、y providing the specified tensionto the specimen.10.3.5 Pre-stress the specimen slowly by cycling 3 timesbetween 0 and the total tension specified. A complete cycleshould take approximately5sofwhich the specimen is underthe specified tension for approximately 3 s.10.3.5.1 Following the third cycle,

42、apply the specifiedtension for a fourth time and measure the fabric stretch asdirected in 10.3.6.10.3.6 Determine fabric stretch after specified tension asapplicable to a material specification or contract order asdirected in 10.3.6.1 through 10.3.6.2. Measure the distance(fabric stretch) between th

43、e bench marks to the nearest 1 % oforiginal gage length while the fabric is under the specifiedtension as follows. In the absence of a material specification orcontract order, use 10.3.6.2.10.3.6.1 Immediately (within 10 s). Record as distance A.10.3.6.2 After 30 6 1 min Record as distance B.10.4 Fa

44、bric Growth after applying a Specified Tension:10.4.1 After following the directions in 10.3, remove thetension weight and allow to recover without tension. Deter-mine fabric growth after specified tension as applicable to amaterial specification or contact order as directed in 10.4.1.1-10.4.1.5. Me

45、asure the distance between bench marks to thenearest 1 % of original gage length after the tension is removedas follows. In the absence of a material specification or contractorder, use 10.4.1.2.10.4.1.1 Immediate (within 10 s) Record as distance C.10.4.1.2 After 30 6 1 s record as distance D.10.4.1

46、.3 After 30 6 1 min. record as distance E.10.4.1.4 After 1 h 6 1 min. record as distance F.10.4.1.5 After 2 h 6 1 min. record as distance G.10.4.2 Remove the tested specimens, in turn, and continueas directed in section 10.3 and 10.4 until 3 specimens havebeen tested for each laboratory sampling uni

47、t.10.5 Fabric Growth after Stretching to a Specified Exten-sion:10.5.1 Place the second specimen of the pair in the stretchtesting equipment as directed in 10.3.1, then measure andrecord the distance between the bench marks to the nearest 1 %of original gage and record as Distance O2(original before

48、stretch).10.5.2 Extend the specimen 85 % of the average fabricstretch calculated in 11.1.1, Eq 2 and hold for a period of 30 61 min. Record as distance H.10.5.3 After 30 6 1 min, release the specimen from thebottom clamp and allow it to hang freely.10.5.4 Determine fabric growth after extension as a

49、ppli-cable to a material specification or contract order as directed in10.5.4.1-10.5.4.4. Measure the distance between bench marksto the nearest 1 % of original gage length after the tension isremoved as follows. In the absence of a material specificationor contract order, use 10.5.4.2.10.5.4.1 after 30 6 1 s. record as distance I.10.5.4.2 after 30 6 1 min. record as distance J.10.5.4.3 after 1 h 6 1 min. record as distance K.10.5.4.4 after 2 h 6 1 min. record as distance L.10.5.5 Remove the tested specimens, in turn, and continueas directed in 10.5 until 3 specimens h