1、Designation: D3773/D3773M 10Standard Test Methods forLength of Woven Fabric1This standard is issued under the fixed designation D3773/D3773M; the number immediately following the designation indicates theyear of original adoption or, in the case of revision, the year of last revision. A number in pa
2、rentheses indicates the year of lastreapproval. A superscript epsilon () indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the Department of Defense.1. Scope1.1 These test methods cover four options for measuringfabric length a
3、nd are applicable to full rolls or bolts ofmaterials.1.2 There are four approved options of measuring length asfollows:1.2.1 Option AHand (Section 6).1.2.2 Option BDrum (Section 7).1.2.3 Option CClock (Section 8).1.2.4 Option DFolding (Section 9).1.3 The values stated in either SI units or in U.S. c
4、ustomaryunits shall be regarded separately as standard. The values statedin each system may not be exact equivalents; therefore, eachsystem must be used independently of the other, withoutcombining values in any way.1.4 This standard does not purport to address all of thesafety concerns, if any, ass
5、ociated with its use. It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2. Referenced Documents2.1 ASTM Standards:2D123 Terminology Relating to TextilesD1776 Practice for
6、Conditioning and Testing TextilesD4850 Terminology Relating to Fabrics and Fabric TestMethodsE177 Practice for Use of the Terms Precision and Bias inASTM Test Methods3. Terminology3.1 For all terminology relating to D13.60, Fabric TestMethods, Specific, refer to Terminology D4850.3.1.1 The following
7、 terms are relevant to this standard:length, stable fabric, woven fabric3.2 For definitions of other textile terms used in this testmethod, refer to Terminology D123.4. Summary of Test Methods4.1 The length is measured from one end of the fabric to theother, using a suitable graduated device, or app
8、aratus asdescribed in the option used.5. Conditioning5.1 Condition the specimens as directed in Practice D1776.5.2 When full rolls or bolts of fabric cannot be properlyconditioned in a reasonable time with available facilities,perform the tests without conditioning and report the actualconditions pr
9、evailing at the time of the test. Such results maynot correspond with the results obtained after testing in thestandard atmosphere for testing textiles.6. Option AHand6.1 Significance and UseThe hand method specifies thatthe length of a fabric be measured in a relaxed tension-freemanner. This test m
10、ethod is the referee method to which allother test methods shall be compared for the establishment oftheir accuracy. This test method can be used for acceptancetesting, although it is not used as a general practice because itis too time consuming.6.1.1 In case of a dispute arising from differences i
11、nreported test values when using Test Methods D3773 foracceptance testing of commercial shipments, the purchaser andsupplier should conduct comparative tests to determine if thereis a statistical bias between their laboratories. Competentstatistical assistance is recommended for the investigation of
12、bias. As a minimum, the two parties should take a group of testspecimens which are as homogeneous as possible and whichare from a lot of material of the type in question. The testspecimens should then be randomly assigned in equal numbersto each laboratory for testing. The average results from the t
13、wolaboratories should be compared using Students t-test forunpaired data and an acceptable probability level chosen by thetwo parties before testing is begun. If a bias is found, either its1These test methods are under the jurisdiction of ASTM Committee D13 onTextiles and are the direct responsibili
14、ty of Subcommittee D13.60 on Fabric TestMethods, Specific.Current edition approved Jan. 1, 2010. Published February 2010 . Originallyapproved in 1989. Last previous edition approved in 2007 as D3773 07. ReplacesSections 6 to 12 of Methods D1910 64 (1975), Test for Construction Character-istics of Wo
15、ven Fabrics. DOI: 10.1520/D3773-07.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.1Copyright ASTM Internatio
16、nal, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.cause must be found and corrected or the purchaser and thesupplier must agree to interpret future test results in the light ofthe known bias.6.2 Apparatus:6.2.1 Flat Horizontal Surface, at least3m(3yd)long andha
17、ving a width equal to or greater than the widest fabric to bemeasured.6.2.2 Length-Measuring Device, metal rule or steel tape,1m (1 yd) minimum length graduated in 1 mm (116 in.) units,and6.2.3 Pins, suitable for use as markers.6.3 SamplingTake a lot sample as directed in the materialspecification o
18、r as agreed upon by the purchaser and seller. Inthe absence of such specification or agreement, all rolls orpieces shall be measured. Consider rolls or bolts of fabric asthe primary sampling units. The lot sample also serves as thelaboratory sample and as the test specimens.6.4 Procedure:6.4.1 Lay t
19、he fabric on a smooth horizontal surface. Fabricmust lay flat, without tension, and free from wrinkles and folds.6.4.2 Using a minimum number of increments, measuresuccessive lengths of fabric parallel to the selvage to thenearest 1 mm (116 in.), marking each length with pins.6.4.3 Add the measureme
20、nts to determine the length of thefabric.7. Option BDrum7.1 Significance and UseThe drum option may be usedfor measuring the length of a fabric for the purpose ofacceptance testing, provided the users laboratory verifies forthe specific weave and construction of interest that resultsobtained by this
21、 test method agree within 6 0.5 % of thoseobtained by the hand option. In cases of dispute the handoption shall be used.7.2 Apparatus:7.2.1 Motor-Driven Measuring Drum3, equipped with a dialor counter geared to the drum. The measuring drum is usuallycovered with fabric or cork. Synchronize the count
22、ing mecha-nism with the drum to read in metres (or yards).7.2.2 Standard Roll, the length of which has been deter-mined by the hand method.7.3 SamplingSample as directed in 6.3.7.4 Procedure:7.4.1 Run the fabric over the measuring drum, face side up,with sufficient tension to keep the fabric running
23、 flat and trueto prevent any slippage. Eliminate any observed slippage byadjusting one or two free running guide rollers to increase thearc of contact between the fabric and the drum when necessary.The rollers should not touch the fabric in contact with thedrum.7.4.2 Read the length from the dial or
24、 counter geared to thedrum. This reading represents the length measured under thetension existing while the fabric is running.7.4.3 Calculate the average length for the lot.8. Option CClock8.1 Significance and UseThe clock option may be usedfor measuring the length of a fabric for the purpose ofacce
25、ptance testing, provided the users laboratory verifies forthe specific weave and construction of interest that resultsobtained by this test method agree within 6 0.5 % of thoseobtained by the hand method. Use the device on any machineequipped to handle continuous lengths of fabric. In cases ofdisput
26、e, the hand option shall be used.8.2 Apparatus:8.2.1 Measuring Device3, consisting of a pair of identicalwheels, mounted 75 to 100 mm (3 to 4 in.) apart on afree-running common axle connected to a counting mechanismgraduated to read in metres or decimetres (yards and eighths ofa yard). The surfaces
27、of the wheels are approximately 10 mm(12 in.) wide and should be covered with cork or other suitablefriction material ground to a known circumference. Synchro-nize the counting mechanism to this circumference so that itwill read in metres (yards).8.2.2 Standard Roll, the length of which has been det
28、er-mined by the hand option.8.3 SamplingSample as directed in 6.3.8.4 Procedure:8.4.1 Mount the measuring device in such a way that themovement of the fabric through the machine will turn thewheels.8.4.2 Run the fabric through the measuring device. Read thelength of fabric directly from the counter.
29、 This reading repre-sents the length measured under the tension existing while thefabric is running.8.4.3 Calculate the average length for the lot.9. Option DFolding9.1 Significance and UseThe machine folding option isgenerally applicable for measuring the length of soft uncoatedfabrics weighing 200
30、 g/m2(6 oz/yd2) or less. However, the testmethod may be used with any fabric for the purpose ofacceptance testing provided the users laboratory verifies thatresults obtained by this test method agree within 60.5 % ofthose obtained by the hand option for the specific weave orconstruction of interest.
31、9.2 Apparatus:9.2.1 Mechanical Device3, that folds a known length offabric at each stroke.9.2.2 Rigid Measuring Device, such as a metre stick gradu-ated in 1-mm units or a yard stick graduated in116-in. units.9.3 SamplingSample as directed in 6.3.9.4 Procedure:9.4.1 Run the fabric through the foldin
32、g device and recordthe length of five or more folds drawn at random intervals withthe metre stick (yard) stick.9.4.2 Calculate the average length of a fold to the nearest 1mm (116 in.).9.4.3 Calculate the length of the fabric as the product of thenumber of strokes required to fold the piece, times t
33、he averagelength of the folds, plus any partial fold, in metres (yards).3Apparatus is commercially available.D3773/D3773M 10210. Report10.1 State that the specimens were tested as directed in TestMethods D3773. Describe the material or product sampled andthe method of sampling used.10.2 Report the f
34、ollowing information:10.2.1 Option used to measure fabric length.10.2.2 Fabric length for each roll or bolt.10.2.3 The atmospheric conditions under which the testswere conducted if not standard, and if the specimens wereconditioned as directed in Practice D1776.11. Precision and Bias11.1 PrecisionTT
35、he precision of this test method is basedon an interlaboratory study of D3773 - Standard Test Methodsfor Length of Woven Fabric, conducted in 1996. Threelaboratories participated in the metal rule/steel tape portion ofthe study (Option A in D3773), while nine laboratories partici-pated in the motor-
36、drive drum against back of fabric analysis(Option B in D3773). Each of the labs reported duplicate testresults for 16 different upholstery fabrics. Every “test result”reported represents an individual determination. Except for theuse of data from only three laboratories for the metal rule/steeltape
37、analysis, Practice E691 was followed for the design andanalysis of the data.11.1.1 Repeatability limit (r) - Two test results obtainedwithin one laboratory shall be judged not equivalent if theydiffer by more than the “r” value for that material; “r” is theinterval representing the critical differen
38、ce between two testresults for the same material, obtained by the same operatorusing the same equipment on the same day in the samelaboratory.11.1.1.1 Repeatability limits are listed in Table 1 and Table2below.11.1.2 Reproducibility limit (R) - Two test results shall bejudged not equivalent if they
39、differ by more than the “R” valuefor that material; “R” is the interval representing the criticaldifference between two test results for the same material,obtained by different operators using different equipment indifferent laboratories.Reproducibility limits are listed in Table 1 and Table 2below.
40、11.1.3 The above terms (repeatability limit and reproduc-ibility limit) are used as specified in Practice E177.11.1.4 Any judgment in accordance with statement 11.1.2would normally have an approximate 95% probability of beingcorrect, however the precision statistics for the metal rule/steeltape anal
41、ysis obtained in this ILS must not be treated as exactmathematical quantities which are applicable to all circum-stances and uses. The limited number of laboratories reportingresults guarantees that there will be times when differencesgreater than predicted by the ILS results will arise, sometimeswi
42、th considerably greater or smaller frequency than the 95%probability limit would imply. The reproducibility limit shouldbe considered as a general guide, and the associated probabilityof 95% as only a rough indicator of what can be expected.11.2 BiasAt the time of the study, there was no acceptedref
43、erence material suitable for determining the bias for this testmethod, therefore no statement on bias is being made.11.3 The precision statement was determined through sta-tistical examination of 384 results, from nine laboratories, on16 different upholstery fabrics.12. Keywords12.1 fabric; length;
44、wovenTABLE 1 Metal Rule/Steel Tape (Yards)Material AverageARepeatabilityStandardDeviationReproducibilityStandardDeviationRepeatabilityLimitReproducibilityLimitxSxsrsRrRRoll A 42.333 0.416 0.125 0.425 0.350 1.191Roll B 41.521 0.425 0.051 0.427 0.143 1.195Roll C 53.792 0.722 0.102 0.725 0.286 2.031Rol
45、l D 58.333 0.402 0.204 0.427 0.572 1.195Roll E 45.792 0.753 0.177 0.764 0.495 2.139Roll F 53.854 0.567 0.561 0.692 1.572 1.938Roll G 54.833 0.524 0.072 0.527 0.202 1.475Roll H 53.542 0.416 0.191 0.438 0.535 1.225Roll I 51.083 1.035 0.473 1.088 1.325 3.046Roll J 58.125 0.758 0.260 0.780 0.729 2.183Ro
46、ll K 55.396 0.505 0.265 0.539 0.742 1.509Roll L 61.958 0.532 0.462 0.624 1.294 1.747Roll M 44.208 0.473 0.204 0.495 0.572 1.385Roll N 53.750 0.556 0.072 0.558 0.202 1.562Roll O 40.197 0.753 0.177 0.764 0.495 2.139Roll P 54.146 0.532 0.051 0.533 0.143 1.492AAverage of Laboratories calculated averages
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49、ditional standardsand should be addressed to ASTM International Headquarters. Your 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 copyrighted 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 stan
