ASTM D6587-2012 red 4375 Standard Test Method for Yarn Number Using Automatic Tester《用自动试验机测定纱线支数的标准试验方法》.pdf

《ASTM D6587-2012 red 4375 Standard Test Method for Yarn Number Using Automatic Tester《用自动试验机测定纱线支数的标准试验方法》.pdf》由会员分享，可在线阅读，更多相关《ASTM D6587-2012 red 4375 Standard Test Method for Yarn Number Using Automatic Tester《用自动试验机测定纱线支数的标准试验方法》.pdf（7页珍藏版）》请在麦多课文档分享上搜索。

1、Designation:D658700 (Reapproved 2006)1Designation: D6587 12Standard Test Method forYarn Number Using Automatic Tester1This standard is issued under the fixed designation D6587; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the ye

2、ar 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.1NOTESection 3 was updated editorially in August 2006.1. Scope1.1 This test method covers the measurement of yarn number of

3、filament and spun yarns using automated testers. Some of theinstruments are stand-alone and others are optional modules for instruments that perform additional tests.1.1.1 The instruments are capable of measuring yarn numbers up to 4000 dtex (3600 denier).NOTE 1For determination of yarn number by us

4、e of reel and balance, refer to Test Method D1907.1.2 The values stated in either SI units or inch-pound units are to be regarded separately as standard. Within the text, theinch-pound units are in parentheses. The values stated in each system aremay not be exact equivalents; therefore, each system

5、shallbe used independently of the other. Combining values from the two systems may result in inaccuracies of results. non-conformancewith the standard.1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibilityof the user of thi

6、s 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 TextilesD1776 Practice for Conditioning and Testing TextilesD1907 Test Method for Linear Densi

7、ty of Yarn (Yarn Number) by the Skein MethodD2258 Practice for Sampling Yarn for TestingD4849 Terminology Related to Yarns and Fibers3. Terminology3.1 For all terminology relating to D13.58, Yarns and Fibers, refer to Terminology D4849.3.1.1 The following terms are relevant to this standard: cotton

8、count, denier, linear density, tex, yarn number, yarn numberingsystem.3.2 For all other textile terms used in this test method, see Terminology D123.4. Summary of Test Method4.1 A specified length of yarn (specimen) is automatically stripped directly from the package, cut, and weighed. The yarnnumbe

9、r is calculated by an interfaced computer, displayed on a monitor, and may be printed. The yarn number can be reportedin tex, denier, or cotton count units.5. Significance and Use5.1 This test method for yarn number is satisfactory for acceptance of commercial shipments and is used in the trade.5.1.

10、1 In case of a dispute arising from differences in reported test results when using this Test Method for acceptance testingof commercial shipments, the purchaser and the supplier should either use the referee Test Method D1907 for yarn number orconduct comparative tests to determine if there is a st

11、atistical bias between their laboratories. Competent statistical assistance is1This test method is under the jurisdiction of ASTM Committee D13 on Textiles and is the direct responsibility of Subcommittee D13.58 on Yarns and Fibers.Current edition approved June 1, 2006. Published August 2006. Origin

12、ally approved in 2000. Last previous edition approved in 2000 as D658700. DOI:10.1520/D6587-00R06E01.Current edition approved July 1, 2012. Published October 2012. Originally approved in 2000. Last previous edition approved in 2006 as D658700(2006)1. DOI:10.1520/D6587-12.2For referenced ASTM standar

13、ds, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at serviceastm.org. For Annual Book of ASTM Standardsvolume information, refer to the standards Document Summary page on the ASTM website.1This document is not an ASTM standard and is intended only to provide the user of an A

14、STM 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 editions as appropriate. In all cases only the current versionof the standard as publishe

15、d 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 States.recommended for the investigation of bias. As a minimum, the two parties should take a group of test specimens that are ashomogeneous

16、as possible and that are from a lot of material of the type in question. The test specimens should then be randomlyassigned in equal numbers to each laboratory for testing. The average results from the two laboratories should be compared usingappropriate statistical analysis and a probability level

17、chosen by the two parties before the testing is begun. If a bias is found, eitherits cause must be found and corrected or the purchaser and the supplier must agree to interpret future test results with considerationto the known bias.5.2 This test method is also used for the quality control for both

18、filament and spun yarns.6. Apparatus6.1 Automatic Yarn Numbering Instrument, with interfaced computer.6.1.1 ACW (Automatic Cut and Weigh) Yarn Tester,3Series T for textile yarns, Series BCF for bulked continuous filament(BCF) carpet yarns, and Series I for industrial yarns. See Fig. 1. The different

19、 series testers have different systems for tensioningyarns and different yarn running speeds.6.1.2 Autocount C4See Fig. 2.6.1.3 Autocount TTA4See Fig. 3.6.1.4 Yarn Count Analyzer (YCA)5See Fig. 4.6.2 Calibration WeightsTwo grams and others as needed to cover the dtex (denier) ranges of interest.7. S

20、ampling7.1 Lot SampleAs a lot sample for acceptance testing, take at random the number of shipping units directed in an applicablematerial specification or other agreement between the purchaser and the supplier, such as an agreement to use Practice D2258.Consider shipping cases or other shipping uni

21、ts to be the primary sampling units.NOTE 2An adequate specification or other agreement between the purchaser and the supplier requires taking into account the variability betweenshipping units, between packages or ends within a shipping unit, and between specimens from a single package to provide a

22、sampling plan with ameaningful producers risk, consumers risk, acceptable quality level, and limiting quality level.7.2 Laboratory SampleAs a laboratory sample for acceptance testing, take at random from each shipping unit in the lotsample the number of packages directed in an applicable material sp

23、ecification or other agreement between the purchaser and thesupplier such as an agreement to use Practice D2258. Preferably, the same number of packages should be taken from each shippingunit in the lot sample. If differing numbers of packages are to be taken from shipping units in the lot sample, d

24、etermine at randomwhich shipping units are to have each number of packages drawn.7.3 Test SpecimenTest one specimen from each package of filament yarn and five specimens from each package of spun yarn.See Table 1 for the length of yarn in a specimen.8. Conditioning8.1Condition the packages in the st

25、andard atmosphere for testing textiles, which is 21 6 1C (70 6 2F) and 65 6 2% relativehumidity, for not less than 4 h. See Practice3Available from W. Fritz Mezger, Inc., 155 Hall St., Spartanburg, SC 29302-1523 and Lenzing Technik GrmbH yarn; yarn numberAPPENDIXES(Nonmandatory Information)X1. ACW (

26、AUTOMATIC-CUT-AND-WEIGH) TESTERX1.1 Preparation and CalibrationX1.1.1 Turn on the motor and allow the tester to warm up for at least 30 min before calibrating the scale.X1.1.2 Enter the computer command for automatic zeroing and calibrationX1.1.3 To eliminate errors due to long-term drift, set the t

27、ester to automatically tare the balance after each set of 20 tests.X1.1.4 Make other periodic checks and inspection of the tester as noted in the manufacturers manual.TABLE 1 Specimen LengthsYarn NumberLength, mdtex Denier Cotton Count#564 #510 $10.4 90564 510 10.4 9D6587 125X1.2 OperationX1.2.1 Set

28、 ACW for operation in Mode 2 (Textile 10 to 520 denier). For heavy denier use Mode 3 (550 to 1200 denier).X1.2.2 Sampling and specimen information is input to the computer in response to prompts. The following sections describethe subsequent operation of the instrument. (A test can be aborted at any

29、 time by pressing the STOP button, which initiates acleaning cycle.)X1.2.3 The end of the yarn is held near the inlet jet (tube). When a photocell senses the hand or yarn end or the START buttonis pressed, Inlet Jets 1 and 2 and the waste gun are turned on and Yarn I transported under tension straig

30、ht through the tester tothe waste container. When the yarn is sensed on exit from Inlet Jet 2, Inlet Jet 1 is turned off, the nip rolls closed, and yarn isstripped from the package for a specified time.X1.2.4 The yarn is then cut ahead of the waste gun, and, simultaneously, the Inlet Jet 2 and the w

31、aste gun are shut off. The divertgun is turned on and the yarn specimen is blown onto the balance. When the specified specimen length is obtained, the inlet cuttercuts the yarn. After 3-s dwell, the balance weighs the specimen over a 2-s interval and the average dtex (denier) of the yarn iscalculate

32、d.X1.2.5 An air jet then blows the specimen off the balance into the waste container.X1.3 Other InformationX1.3.1 Computer commands and prompts, error messages, diagnostic test commands, and trouble shooting information aregiven in the manufacturers manual.X2. TEXTECHNO AUTOCOUNTX2.1 Preparation and

33、 CalibrationX2.1.1 Switch the tester on and allow the tester to warm up for at least 30 min before calibrating the balance.X2.1.2 Zero the balance by pressing its “T” or “Tare” key. Use the automatic calibration function of the balance or put desiredcalibration weight on and check the calibration. R

34、efer to the manufacturers operation manual for calibration details.X2.1.3 During operation the balance will tare automatically before each new test or before each new package (as selected inthe software).X2.2 Operation of the Autocount TTA (Statimat Tensile Tester Insert)X2.2.1 The yarn travels thro

35、ugh the yarn tension guides on the top rear of the tensile tester.X2.2.2 The collection chamber is lowered onto the balance and it tares the weight of the chamber from the balance. After taringthe weight of the chamber, it is lifted into the receiving position.X2.2.3 The feed arm grabs the yarn and

36、pulls it into the nip rolls. The draw-off arm places the yarn in the suction head and thecutters cut the yarn to have a well-defined beginning. The nip rolls reel off (skein) a specified length of yarn into the suction headand are aspirated into the collection chamber, on the balance.X2.2.4 After th

37、e specified length has been collected, the suction head cutters cut the yarn. Any slight variation in the set testlength is compensated for in the calculation.X2.2.5The collection chamber is lowered onto the balance and the weight is recorded and sent to the computer and software,for conversion to t

38、he specified count system. The sample is then ejected from the collection chamber and the chamber is againlowered onto the balance to tare the weight of the chamber.X2.2.5 The collection chamber is lowered onto the balance and the weight is recorded and sent to the computer and software,for conversi

39、on to the specified count system. If the yarn number of twisted yarn is measured, but yarn number of untwisted materialis required, a calibration curve shall be used. The untwisted data must be obtained as directed in Test Method D1907. The sampleis then ejected from the collection chamber and the c

40、hamber is again lowered onto the balance to tare the weight of the chamber.X2.2.6 If tensile tests were required and specified in the software, the Statimat performs the tensile tests, and, after the lastbreak, the yarn is cut and the magazine moves the next yarn into position to be tested.X2.3 Oper

41、ation of the Autocount C ModelX2.3.1 The yarn passes through a tension device and into the tester from the top. A cutter cuts the yarn end in order to havea well-defined beginning of the section to be tested. A nip roll feeding device reels (skeins) the yarn into the collection chamberby means of an

42、 aspirator.X2.3.2 After the programmed length has been collected in the chamber, the cutter cuts the yarn end. A flap at the bottom of thecollection chamber opens and the yarn sample will fall onto the balance. While the sample is being weighed, the next sample isbeing collected in the collection ch

43、amber (continuous operation).X2.3.3 After weighing the sample, an air jet blows the sample from the balance and into a waste container.X2.3.4 The version for combined use with another tester, such as the Dynafil, is equipped with a yarn switch instead of a cutterand nip roll feeding device. Knots or

44、 splices at the beginning of a new yarn sample are automatically cut off and blown into thewaste chamber. The length of the yarn is measured by the intake godet of the Dynafil.D6587 126X3. YARN COUNT ANALYZER (YCA) TESTERX3.1 OperationX3.1.1 The balance tares the chamber.X3.1.2 The yarn enters the t

45、ester from the left. A rapier arm pulls the yarn into place, passing it through an adjustablepretensioning device. The yarn is then cut and the beginning end is suctioned into the waste container. As the waste is removed,the nip rolls start and transport a measured length of yarn from the package to

46、 the collection chamber. This specimen is cut at theend coming from the package.X3.1.3 The chamber with the specimen is lowered onto the balance and the mass recorded after the balance has stabilized. Theyarn number is calculated and the specimen is ejected from the balance to a waste container by a

47、n air jet.X3.1.4 The tester is designed to run continuously. The collected specimen is transferred from the collection chamber to abalance chamber. Then, while a specimen on the balance is being weighed, the next specimen is being collected.ASTM International takes no position respecting the validit

48、y of 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

49、 to 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. 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 a