1、Designation: D 3773 07Standard Test Methods forLength of Woven Fabric1This standard is issued under the fixed designation D 3773; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision. A number in parentheses in
2、dicates the year of last reapproval. Asuperscript epsilon (e) 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 and are appl
3、icable 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. customaryuni
4、ts 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, associated wit
5、h 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:2D 123 Terminology Relating to TextilesD 1776 Practice for Condition
6、ing and Testing TextilesD 4850 Terminology Relating to Fabric3. Terminology3.1 For all terminology relating to D13.60, Fabric TestMethods, Specific, refer to Terminology D 4850.3.1.1 The following terms are relevant to this standard:length, stable fabric, woven fabric3.2 For definitions of other tex
7、tile terms used in this testmethod, refer to Terminology D 123.4. Summary of Test Methods4.1 The length is measured from one end of the fabric to theother, using a suitable graduated device, or apparatus asdescribed in the option used.5. Conditioning5.1 Condition the specimens as directed in Practic
8、e D 1776.5.2 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 prevailing at the time of the test. Such results maynot correspond with the results obtained after testi
9、ng 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 method is the referee method to which allother test methods shall be compared for the establishment oft
10、heir 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 inreported test values when using Test Methods D 3773 foracceptance testing of commercial shipments, th
11、e purchaser andsupplier should conduct comparative tests to determine if thereis a statistical bias between their laboratories. Competentstatistical assistance is recommended for the investigation ofbias. As a minimum, the two parties should take a group of testspecimens which are as homogeneous as
12、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 twolaboratories should be compared using Students t-test forunpaired data and an acceptable probabilit
13、y 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 responsibility of Subcommittee D13.60 on Fabric TestMethods, Specific.Current edition approved July 1, 2007. Publ
14、ished August 2007. Originallyapproved in 1989. Last previous edition approved in 2002 as D 3773 90(2002).Replaces Sections 6 to 12 of Methods D 1910 64 (1975), Test for ConstructionCharacteristics of Woven Fabrics.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM C
15、ustomer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.cause must be found and correcte
16、d 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 andhaving a width equal to or greater than the widest fabric to bemeasured.6.2.2 Length-Measuring Device, metal rule or steel
17、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 or as agreed upon by the purchaser and seller. Inthe absence of such specification or agreement, all rolls orpieces shall
18、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 the fabric on a smooth horizontal surface. Fabricmust lay flat, without tension, and free from wrinkles and folds.6.4.2 Us
19、ing 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 measurements to determine the length of thefabric.7. Option BDrum7.1 Significance and UseThe drum option may be usedfor measuring
20、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 test method agree within 6 0.5 % of thoseobtained by the hand option. In cases of dispute the handoption shall be used.7
21、.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 counting mecha-nism with the drum to read in metres (or yards).7.2.2 Standard Roll, the length of which has been deter-mined b
22、y 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 flat and trueto prevent any slippage. Eliminate any observed slippage byadjusting one or two free running guide rollers
23、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 counter geared to thedrum. This reading represents the length measured under thetension existing while the fabric is run
24、ning.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 ofacceptance testing, provided the users laboratory verifies forthe specific weave and construction of interest that resultsobt
25、ained 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 ofdispute, the hand option shall be used.8.2 Apparatus:8.2.1 Measuring Device3, consisting of a pair of identicalwheels, mounted
26、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 of the wheels are approximately 10 mm(12 in.) wide and should be covered with cork or other suitablefriction material gro
27、und 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 deter-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
28、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. This reading repre-sents the length measured under the tension existing while thefabric is running.8.4.3 Calculate the a
29、verage 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 g/m2(6 oz/yd2) or less. However, the testmethod may be used with any fabric for the purpose ofacceptance testing provide
30、d 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.9.2 Apparatus:9.2.1 Mechanical Device3, that folds a known length offabric at each stroke.9.2.2 Rigid Measuring Device, s
31、uch 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 folding device and recordthe length of five or more folds drawn at random intervals withthe metre stick (yard) stick.9.4.2 Calc
32、ulate 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 the averagelength of the folds, plus any partial fold, in metres (yards).3Apparatus is commercially available.D377307210.
33、Report10.1 State that the specimens were tested as directed in TestMethods D 3773. Describe the material or product sampled andthe method of sampling used.10.2 Report the following information:10.2.1 Option used to measure fabric length.10.2.2 Fabric length for each roll or bolt.10.2.3 The atmospher
34、ic conditions under which the testswere conducted if not standard, and if the specimens wereconditioned as directed in Practice D 1776.11. Precision and Bias11.1 PrecisionThe precision of Test Method D 3773 formeasuring the length of woven fabric Option B is beinganalyzed.11.2 BiasThe procedure in T
35、est Method D 3773 for mea-suring fabric length by the hand option has no known bias andis accepted as a referee method.12. Keywords12.1 fabric; length; wovenASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standar
36、d. 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 revision at any time by the responsible technical committee and must be reviewed
37、 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. Your comments will receive careful consideration at a meeting of theresponsible t
38、echnical 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 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).D3773073
