ASTM D8054/D8054M-16

Standard Test Methods for Tensile Testing of Para-Aramid Flat Yarns

SIGNIFICANCE AND USE
5.1 For application areas such as optical fiber and cable reinforcements, aramid is usually used in a linear – not twisted – form. For designing constructions like this, it is essential to use data based on a specimen without twist applied.  
5.1.1 The modulus and FASE of twisted yarns demonstrate reduced values when compared to p-aramid flat yarns.  
5.1.2 Use Test Method D7269 for testing of twisted p-aramid yarns.  
5.2 The levels of tensile properties obtained when testing aramid yarns are dependent on the age and history of the specimen and on the specific conditions used during the test. Among these conditions are rate of stretching, type of clamps, gauge length of specimen, temperature and humidity of the atmosphere, rate of airflow across the specimen, and temperature and moisture content of the specimen. Testing conditions accordingly are specified precisely to obtain reproducible test results on a specific sample.  
5.3 The FASE is used to describe the absolute resistance of the p-aramid flat yarn to an imposed deformation.  
5.4 The initial modulus of the yarn is the value most commonly used when a specified force is applied to the yarn.  
5.5 Shape, size, and internal construction of the end-product can have appreciable effect on product performance. It is not possible, therefore, to evaluate the performance of end product in terms of the reinforcing material alone.  
5.6 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, test samples should be used that are as homogeneous as possible, that are drawn from the material from which the disparate test results were obtained, and that are randomly assigned in equal numbers to each laboratory for testing. Other materials with established test values may be used for this purpose. The test results ...
SCOPE
1.1 These test methods cover the tensile testing of para-aramid flat yarns.  
1.1.1 This standard includes procedures used to measure force at specified elongation (FASE) of para-aramid flat yarns.  
1.1.2 This standard includes procedures used to measure linear density of para-aramid flat yarns.  
1.1.3 This standard includes procedures to determine modulus of para-aramid flat yarns.  
1.2 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with 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 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-2016
• ICS: 49.025.60 - Textiles
• Technical Committee: D13 - Textiles
• Drafting Committee: D13.19 - Industrial Fibers and Metallic Reinforcements

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: D8054/D8054M − 16
Standard Test Methods for
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Tensile Testing of Para-Aramid Flat Yarns
This standard is issued under the fixed designation D8054/D8054M; 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 (Yarn Number) by the Skein Method
D2258 Practice for Sampling Yarn for Testing
1.1 These test methods cover the tensile testing of para-
D3800 Test Method for Density of High-Modulus Fibers
aramid flat yarns.
D4848 Terminology Related to Force, Deformation and
1.1.1 This standard includes procedures used to measure
Related Properties of Textiles
force at specified elongation (FASE) of para-aramid flat yarns.
D6477 Terminology Relating to Tire Cord, Bead Wire, Hose
1.1.2 This standard includes procedures used to measure
Reinforcing Wire, and Fabrics
linear density of para-aramid flat yarns.
D6587 Test Method for Yarn Number Using Automatic
1.1.3 This standard includes procedures to determine modu-
Tester
lus of para-aramid flat yarns.
D7269 Test Methods for Tensile Testing of Aramid Yarns
1.2 The values stated in either SI units or inch-pound units
E691 Practice for Conducting an Interlaboratory Study to
are to be regarded separately as standard. The values stated in
Determine the Precision of a Test Method
each system may not be exact equivalents; therefore, each
E177 Practice for Use of the Terms Precision and Bias in
system shall be used independently of the other. Combining
ASTM Test Methods
values from the two systems may result in non-conformance
3. Terminology
with the standard.
1.3 This standard does not purport to address all of the 3.1 Definitions:
safety concerns, if any, associated with its use. It is the 3.1.1 flat yarn, n—continuous filament yarns which, when
responsibility of the user of this standard to establish appro- removed from processing package are fully drawn, without
priate safety, health, and environmental practices and deter- twist and untextured.
mine the applicability of regulatory limitations prior to use. 3.1.1.1 Discussion—Flat yarn is either extruded in this form
1.4 This international standard was developed in accor- or it could be made as a slit cut structure with no additional
dance with internationally recognized principles on standard- processing modifying the extension direction of the individual
ization established in the Decision on Principles for the
elements (for example, filaments) in the yarn.
Development of International Standards, Guides and Recom-
3.2 The following terms are relevant to this standard:
mendations issued by the World Trade Organization Technical
modulus, elongation, force at specified elongation (FASE),
Barriers to Trade (TBT) Committee.
force-elongation curve.
3.3 For definitions of terms related to industrial fibers and
2. Referenced Documents
metallic reinforcements, see Terminology D6477.
2
2.1 ASTM Standards:
3.4 For definitions of terms related to force and deformation
D76 Specification for Tensile Testing Machines for Textiles
in textiles, refer to Terminology D4848.
D123 Terminology Relating to Textiles
D1776/D1776M Practice for Conditioning and Testing Tex-
3.5 For definitions of other terms related to textiles, refer to
tiles
Terminology D123.
D1907/D1907M Test Method for Linear Density of Yarn
4. Summary of Test Methods
4.1 Using various test methods and protocols identified in
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These test methods are under the jurisdiction of ASTM Committee D13 on
the procedures, this standard determines the tensile strength,
Textiles and are the direct responsibility of Subcommittee D13.19 on Industrial
forceatspecifiedelonation(FASE),lineardensityandmodulus
Fibers and Metallic Reinforcements.
Current edition approved July 1, 2016. Published November 2016. DOI: of para-aramid flat yarns.
10.1520/D8054_D8054M-16.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or 5. Significance and Use
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
5.1 For application areas such as optical fiber and cable
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. reinforcements, aramid is usually used in a linear – not twisted
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D8054/D8054M − 16
– form. For designing constructions like this, it is essential to Figure X1.1). It is recommended to use pneumatic clamps
use data based on a specimen without twist applied. which can be operated using a foot pedal.
5.1.1 The modulus and FASE of twisted yar
...