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ASTM D7269-07

(Test Method)

Standard Test Methods for Tensile Testing of Aramid Yarns

Standard Test Methods for Tensile Testing of Aramid Yarns

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1.1 These test methods cover the tensile testing of aramid yarns, cords twisted from such yarns, and fabrics woven from such cords. The yarn or cord may be wound on cones, tubes, bobbins, spools, or beams; may be woven into fabric; or may be in some other form. The methods include testing procedure only and include no specifications or tolerances.
1.2 These test methods show the values in both SI and inch-pound units. SI units is the technically correct name for the system of metric units known as the International System of Units. Inch-pound units is the technically correct name for the customary units used in the United States. The values stated in either acceptable metric units or other units shall be regarded separately as standard. The values expressed in each system may not be exact equivalents; therefore, each system must be used independently of each other, without combining values in any way.
1.3 This standard includes the following test methods:
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.

General Information

Status
Historical
Publication Date
30-Jun-2007
ICS
59.080.20 - Yarns
Technical Committee
D13 - Textiles
Drafting Committee
D13.19 - Industrial Fibers and Metallic Reinforcements
Current Stage
Ref Project

Relations

Replaces
ASTM D7269-06 - Standard Test Methods for Tensile Testing of Aramid Yarns
Effective Date
01-Jul-2007
Replaced By
ASTM D7269-08 - Standard Test Methods for Tensile Testing of Aramid Yarns
Effective Date
01-Aug-2008
Referred By
ASTM D8054/D8054M-22 - Standard Test Methods for Tensile Testing of Para-Aramid Flat Yarns
Effective Date
01-Jul-2007
Referred By
ASTM D6588/D6588M-11(2016) - Standard Test Method for Fatigue of Tire Cords (Disc Fatigue Test)
Effective Date
01-Jul-2007
Referred By
ASTM D1776/D1776M-20 - Standard Practice for Conditioning and Testing Textiles
Effective Date
01-Jul-2007

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ASTM D7269-07 - Standard Test Methods for Tensile Testing of Aramid YarnsASTM D7269-07 - Standard Test Methods for Tensile Testing of Aramid Yarns
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ASTM D7269-07 - Standard Test Methods for Tensile Testing of Aramid Yarns
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Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation:D7269–07
Standard Test Methods for
1
Tensile Testing of Aramid Yarns
This standard is issued under the fixed designation D 7269; 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 (e) indicates an editorial change since the last revision or reapproval.
1. Scope D 885 Test Methods for Tire Cords, Tire Cord Fabrics, and
Industrial Filament Yarns Made from Manufactured
1.1 These test methods cover the tensile testing of aramid
Organic-Base Fibers
yarns, cords twisted from such yarns, and fabrics woven from
D 1776 Practice for Conditioning and Testing Textiles
such cords. The yarn or cord may be wound on cones, tubes,
D 1907 Test Method for Linear Density of Yarn (Yarn
bobbins, spools, or beams; may be woven into fabric; or may
Number) by the Skein Method
be in some other form. The methods include testing procedure
D 1909 Standard Table of Commercial Moisture Regains
only and include no specifications or tolerances.
for Textile Fibers
1.2 These test methods show the values in both SI and
D 2258 Practice for Sampling Yarn for Testing
inch-pound units. SI units is the technically correct name for
D 4848 Terminology of Force, Deformation and Related
thesystemofmetricunitsknownastheInternationalSystemof
Properties of Textiles
Units. Inch-pound units is the technically correct name for the
D 6477 Terminology Relating to Tire Cord, Bead Wire,
customary units used in the United States. The values stated in
Hose Reinforcing Wire, and Fabrics
either acceptable metric units or other units shall be regarded
separately as standard. The values expressed in each system
3. Terminology
may not be exact equivalents; therefore, each system must be
3.1 Definitions:
used independently of each other, without combining values in
3.1.1 For definitions of terms relating to tire cord and tire
any way.
cord fabrics, refer to Terminology D 6477.
1.3 This standard includes the following test methods:
3.1.1.1 The following terms are relevant to this standard:
Section
cord, cord twist, dip, dip pickup, in a textile cord or fabric,
Breaking Strength (Force) 11
Breaking Tenacity 12
industrial yarn, moisture equilibrium for testing, for industrial
Breaking Toughness 17
yarns and tire cords, pneumatic tire, single twist, standard
Elongation at Break 13
atmosphere for testing textiles, tabby sample, tire, and tire cord
Force at Specified Elongation (FASE) 14
Linear Density 10
fabric.
Modulus 15
3.1.2 For definitions of terms related to force and deforma-
Work-to-Break 16
tion in textiles, refer to Terminology D 4848.
1.4 This standard does not purport to address all of the
3.1.2.1 The following terms are relevant to this standard:
safety concerns, if any, associated with its use. It is the
breaking force, breaking strength, breaking tenacity. breaking
responsibility of the user of this standard to establish appro-
toughness, chord modulus, in a stress-strain curve, elongation,
priate safety and health practices and determine the applica-
force at specified elongation (FASE), initial modulus, tensile
bility of regulatory limitations prior to use.
strength, and work-to-break.
3.1.3 For definitions of other terms related to textiles, refer
2. Referenced Documents
to Terminology D 123.
2
2.1 ASTM Standards:
3.1.3.1 The following terms are relevant to this standard:
D76 SpecificationforTensileTestingMachinesforTextiles
fabric and growth.
D 123 Terminology Relating to Textiles
4. Summary of Test Method
1 4.1 These test methods are used to determine the tensile
These test methods are under the jurisdiction of ASTM Committee D13 on
Textiles and are the direct responsibility of Subcommittee D13.19 on Tire Cord and properties of aramid yarns or cords.
Fabrics.
4.2 Aconditioned or oven-dried specimen of aramid yarn or
Current edition approved July 1, 2007. Published July 2007. Originally approved
cord is clamped in a tensile testing machine and then stretched
in 2006. Last previous edition approved in 2006 as D 7269–06.
2
or loaded until broken. Breaking force, elongation, and force at
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
specified elongation (FASE) are determined directly. Modulus
Standards volume information, refer to the standard’s Document Summary page on
and work-to-break are calculated from the force-elongation
the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1

---------------------- Page: 1 ----------------------
D7269–07
curve.Theoutputofaconstant-rate-of-extension(CRE)tensile appreciable effect on product performa
...

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5.3 The extension force of manufactured filament yarns is related to the alignment of the molecules in the yarn filaments, which influences the yarn processing behavior. Knowledge of this property of partially oriented yarn is useful to determine processing conditions.
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5.1 This is a quick method used for the determination of the approximate yarn number of short-length specimens taken from packages or fabrics.  
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5.1 Test Method D6774, for determining maximum total contraction, crimp, and residual fiber shrinkage in textured filament yarns is suitable for acceptance testing of commercial shipments.  
5.1.1 If there are differences of practical significance between reported test results for two laboratories (or more), comparative tests should be performed to determine if there is a statistical bias between them, using competent statistical assistance. As a minimum, use the samples for such a comparative tests that are as homogeneous as possible, drawn from the same lot of material as the samples that resulted in disparate results during initial testing and randomly assigned in equal numbers to each laboratory. The test results from the laboratories involved should be compared using a statistical test for unpaired data, a probability level chosen prior to the testing series. If a bias is found, either its cause must be found and corrected, or future test results for that material must be adjusted in consideration of the known bias.  
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5.1 Test Method D1423 for testing twist in yarns by direct-counting is considered satisfactory for acceptance testing of commercial shipments because current estimates of between-laboratory precision are acceptable and the method has been used extensively in the trade for acceptance testing.  
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1.3 This test method is not intended for yarns that extend more than 5.0 % when tension is increased from 2.5 to 7.5 mN/tex [0.25 to 0.75 gf/tex]. Following the procedures of this test method for such yarns would be independent of the bias and precision determined for this test method. The report from such testing should include the tension used for this testing.  
1.4 Units—The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system are not necessarily exact equivalents; therefore, to ensure conformance with the standard, each system shall be used independently of the other, and values from the two systems shall not be combined.
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ASTM D6612-00(2022)(Test Method)
Standard Test Method for Yarn Number and Yarn Number Variability Using Automated Tester

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5.1 Test Method D6612 for yarn number and yarn number variability is satisfactory for acceptance of commercial shipments and is used in the trade.  
5.1.1 If there are differences of practical significance between the reported test results for two or more laboratories, comparative tests should be performed by those laboratories to determine if there is a statistical bias between them, using competent statistical assistance. As a minimum, samples used for each comparative tests should be as homogeneous as possible, drawn from the same lot of material as the samples that results in disparate results during initial testing, and randomly assigned in equal numbers to each laboratory. Other fabrics with established tests values are used for this purpose. The test results from the laboratories involved should be compared appropriate statistical analysis and a probability level chosen by the two parties before testing begins, at a probability level chosen prior to the testing series. If a bias is found, either its cause must be found and corrected, or future test results adjusted in consideration of the known bias.  
5.1.2 The average results from the two laboratories should be compared using appropriate 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.  
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Standard Practice for Sampling Yarn for Testing

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5.2 Practice D2258 may not give the most efficient sampling plan that might be devised in special situations but does present a general procedure that gives satisfactory precision with an economical amount of sampling. Many plans that include stratified sampling can be found in textbooks and through the use of statistical software tools and calculators.  
5.2.1 If not specified by the purchaser, the manufacturer will define suitable production lots based on one or more of the following: supply lot, production shift/time segment, production equipment or production line, operator, designated shipment, production run, or a combination herein.  
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1.1 This practice describes a procedure for the division of shipments of yarn into test lots and the sampling of such lots for testing.  
1.1.1 This practice can be used for lot sample testing of yarns for both pre-fabric production and post-fabric production.  
1.2 This practice is applicable to single, plied, or cabled yarns, and cords, made of any fiber or mixture of fibers, and supported on any form of package, including beams.  
1.3 This practice also describes procedures for the sampling of yarn(s) removed from woven or knitted fabrics; however, when thus sampled, the yarns are usually not representative of entire shipments, as referred to in 1.1. Consequently, the resultant sampling can only be used to determine the characteristics of the yarn and is usually not used for acceptance testing. Moreover, it should be recognized that the characteristics of yarns from fabrics may be different than the characteristics of the same yarn(s), prior to being entered into the fabric manufacturing process.  
1.4 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system are not necessarily exact equivalents; therefore, to ensure conformance with the standard, each system shall be used independently of the other, and values from the two systems shall not be combined.  
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, health, and environmental 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...

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ASTM
ASTM D3693-02(2021)(Specification)
Standard Specification for Labeled Length per Holder of Sewing Thread

ABSTRACT
This specification covers the requirements for the labeled lengths per holder of sewing threads of all materials. The test specimen is a thread holder whether a cone, tube, spool, ready-made bobbin, or any other holders. The observed length for all holders such as home sewing spools, ready-made bobbins, or all other holders which depends on the sampling size shall equal or exceed a certain percentage of the minimum allowable labeled length.
SCOPE
1.1 This specification covers requirements for the labeled lengths of sewing threads of all materials.  
1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.  
1.3 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.

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ASTM
ASTM D2731-21(Test Method)
Standard Test Method for Elastic Properties of Elastomeric Yarns (CRE Type Tensile Testing Machines)

SIGNIFICANCE AND USE
5.1 This test method is considered satisfactory for acceptance testing of commercial shipments since current estimates of between-laboratory precision are acceptable and the method is used extensively in the trade for acceptance testing.  
5.1.1 If there are differences of practical significance between reported test results for two laboratories (or more), comparative tests should be performed to determine if there is a statistical bias between them, using competent statistical assistance. As a minimum, use samples for such comparative tests that are as homogeneous as possible, drawn from the same lot of material as the samples that resulted in disparate results during initial testing, and randomly assigned in equal numbers to each laboratory. The test results from the laboratories involved should be compared using a statistical test for unpaired data, at a probability level chosen prior to the testing series. If bias is found, either its cause must be found and corrected, or future test results for that material must be adjusted in consideration of the known bias.  
5.2 Force at Specified Elongation (FASE) is a measure of the tensile force occurring while extending a textile material within specified limits. This characteristic of elastomeric yarn indicates the resistance that will have to be overcome by the wearer while putting on a garment made of the material and is also an indication of the garment's resistance to deformation caused by normal body movements during wear. The elongations used for these measurements are typically 100 %, 200 % and 300 %.  
5.3 Permanent Deformation (set) is a measure of the increase in length of an elastomeric yarn resulting from cyclic stretching and relaxation. The characteristic is a visible indication of the realignment of intermolecular bonds within the elastic material. As with stress decay, the amount of set increases with yarn extension; however, for any particular extension, little or no additional set takes place after...
SCOPE
1.1 This test method covers the determination of elastic properties of “as produced” elastomeric yarns made from rubber, spandex or other elastomers. Elastic properties include force at specified elongations, permanent deformation and stress decay. Other hysteresis related properties can be calculated.
Note 1: For a method designed specifically for testing rubber threads, refer to Test Method D2433.  
1.2 This test method is not applicable to covered, wrapped, or core-spun yarns or yarns spun from elastomeric staple.  
1.3 This test method is applicable to elastomeric yarns having a range of 40 to 3200 dtex (36 to 2900 denier).  
1.4 The values stated in either SI units or U.S. Customary units are to be regarded separately as standard. Within the text, the U.S. Customary units are in parentheses. The values stated in each system are not exact equivalents; therefore, each system shall be used independently of the other.  
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, health, and environmental 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.

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