ASTM D6197-99(2017)
(Test Method)Standard Test Method for Classifying and Counting Faults in Spun Yarns in Electronic Tests
Standard Test Method for Classifying and Counting Faults in Spun Yarns in Electronic Tests
SIGNIFICANCE AND USE
5.1 This test method is considered satisfactory for acceptance testing of commercial shipments of spun yarns by agreement between purchaser and supplier.
5.1.1 In case of a dispute arising from differences in reported test results when using this test method for acceptance testing of commercial shipments, the purchaser and supplier should conduct comparative tests to determine if there is a statistical bias between their laboratories. Competent statistical assistance is recommended for the investigation of bias. As a minimum, the two parties should take a group of test specimens that are as homogenous as possible and that are from a lot of material of the type in question. The test specimens should then be randomly assigned in equal numbers to each laboratory for testing. The average result from the two laboratories should be compared using statistical analysis and a probability level chosen by the two parties before the testing is begun. If a bias is found, either its cause must be found and corrected or the purchaser and the supplier must agree to interpret future test results with consideration to the known bias.
5.2 Yarn faults are a factor in determining yarn and fabric quality.
SCOPE
1.1 This test method covers the classifying and counting of faults in spun yarns using capacitance testers.
1.1.1 Protruding fibers or yarn hairiness, or both, are not determined as part of this method.
Note 1: For measuring protruding fibers or hairiness, or both, refer to Guide D5647.
1.2 This test method provides for grading yarns by fault level and type.
1.3 This test method is applicable to all single or plied spun yarns from natural or manufactured fibers or blends of each.
1.4 The values stated in SI units are to be regarded as standard; the values in inch-pound units are provided as information only and are not exact equivalents.
1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
1.6 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
General Information
Relations
Standards Content (Sample)
This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation: D6197 − 99 (Reapproved 2017)
Standard Test Method for
Classifying and Counting Faults in Spun Yarns in Electronic
Tests
This standard is issued under the fixed designation D6197; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope D4849 Terminology Related to Yarns and Fibers
1.1 This test method covers the classifying and counting of
3. Terminology
faults in spun yarns using capacitance testers.
1.1.1 Protruding fibers or yarn hairiness, or both, are not
3.1 For terminology related to yarn test methods refer to
determined as part of this method.
Terminology D4849.
NOTE 1—For measuring protruding fibers or hairiness, or both, refer to
3.2 The following terms are relevant to this standard: spun
Guide D5647.
yarn; yarn fault; yarn fault count.
1.2 This test method provides for grading yarns by fault
3.3 For definitions of other textile terms used in this test
level and type.
method refer to Terminology D123.
1.3 This test method is applicable to all single or plied spun
yarns from natural or manufactured fibers or blends of each.
4. Summary of Test Method
1.4 The values stated in SI units are to be regarded as
4.1 A specimen is passed through the sensing device of a
standard; the values in inch-pound units are provided as
classifying instrument at a constant speed. The electronic
information only and are not exact equivalents.
counting instrument records the faults and classifies them
1.5 This standard does not purport to address all of the according to their length and relative diameter. The faults for
safety concerns, if any, associated with its use. It is the
the most part are in the form of thick places, thin places and
responsibility of the user of this standard to establish appro- neps in yarns spun on various spinning systems.
priate safety and health practices and determine the applica-
bility of regulatory limitations prior to use.
5. Significance and Use
1.6 This international standard was developed in accor-
5.1 This test method is considered satisfactory for accep-
dance with internationally recognized principles on standard-
tance testing of commercial shipments of spun yarns by
ization established in the Decision on Principles for the
agreement between purchaser and supplier.
Development of International Standards, Guides and Recom-
5.1.1 In case of a dispute arising from differences in
mendations issued by the World Trade Organization Technical
reported test results when using this test method for acceptance
Barriers to Trade (TBT) Committee.
testing of commercial shipments, the purchaser and supplier
should conduct comparative tests to determine if there is a
2. Referenced Documents
statistical bias between their laboratories. Competent statistical
2.1 ASTM Standards:
assistance is recommended for the investigation of bias. As a
D123 Terminology Relating to Textiles
minimum, the two parties should take a group of test speci-
D2258 Practice for Sampling Yarn for Testing
mensthatareashomogenousaspossibleandthatarefromalot
D5647 Guide for Measuring Hairiness of Yarns by the
of material of the type in question. The test specimens should
Photo-Electric Apparatus
then be randomly assigned in equal numbers to each laboratory
for testing.The average result from the two laboratories should
1 be compared using statistical analysis and a probability level
This test method is under the jurisdiction ofASTM Committee D13 on Textiles
and is the direct responsibility of Subcommittee D13.58 on Yarns and Fibers.
chosen by the two parties before the testing is begun. If a bias
Current edition approved July 1, 2017. Published July 2017. Originally approved
is found, either its cause must be found and corrected or the
in 1999. Last previous edition approved in 2011 as D6197–99(2011). DOI:
purchaser and the supplier must agree to interpret future test
10.1520/D6197-99R17.
results with consideration to the known bias.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
5.2 Yarn faults are a factor in determining yarn and fabric
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. quality.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
D6197 − 99 (2017)
6. Apparatus 9.3.1 Verify that control unit speed selection is set to the
same speed as the take-up mechanism.
6.1 Electronic Measuring Device—A capacitance or optical
9.4 Checkthepackagetoensurethatnoshippingmaterialor
unit with guide alignment of the yarn in a straight path through
the measuring zone. other contaminant is present and that no damage is apparent on
the package. If contaminants or damage are detected, select
6.2 Control Unit—A device that supplies the signal to
another package for testing.
operate the measuring device and, also in return, receives the
registration signal from the measuring device, stores the NOTE 3—Do not separate the length of yarn from the packages prior to
testing.
informationreceived,respondstothisinformationaccordingto
a predetermined setup, and outputs computed data at the end of
9.5 Mount the package on a suitable holder. Thread the free
the test.
end of the yarn directly from the package through the instru-
ment.
6.3 Winder—A power driven take-up device equipped with
a winding drum of uniform diameter and capable of operating
9.6 Start the take-up mechanism of the tester.
at constant take-up speed.
9.7 Test the total predetermined yarn length, that may
6.4 Yarn Tensioning Device—A unit for the control of the require more than one package.
yarn in the measuring zone so that the yarn travels in a straight
9.8 Follow the tester instruction manual for operational
path, free from kinks, without stretching the yarn.
procedures not outlined in this test method.
9.9 For testers not equipped with automatic data
7. Sampling
calculations, weigh the yarn tested to the nearest 0.001 kg or
7.1 Lot Sample—Unless otherwise agreed upon, as when
0.1 oz to determine the length.
specified in an applicable material specification, take a lot
10. Calculation
sample as directed in Practice D2258.
7.1.1 For production test, take lot samples and laboratory
10.1 For testers not equipped with automatic data output,
samples in multiples of spindle positions on the tester.
calculate the yarn fault and express in terms of
...
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