ASTM D2970/D2970M-04(2014)
(Test Method)Standard Test Methods for Testing Tire Cords, Tire Cord Fabrics, and Industrial Yarns Made From Glass Filaments (Withdrawn 2023)
Standard Test Methods for Testing Tire Cords, Tire Cord Fabrics, and Industrial Yarns Made From Glass Filaments (Withdrawn 2023)
SIGNIFICANCE AND USE
5.1 The procedures in these test methods may be used for the acceptance testing of commercial shipments, but caution is advised because technicians may fail to get good agreement between results on certain yarns, cords, or fabrics. Comparative tests as directed in Section 5.1.1 may be advisable.
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, 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 from the two laboratories should be compared using a statistical test for unpaired data, 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 for that material must be adjusted in consideration of the known bias.
5.2 The significance and use of particular properties are discussed in the appropriate sections of the specific test methods.
SCOPE
1.1 These test methods cover the testing of industrial yarns made of glass filaments, cords twisted from such yarns, and fabric woven from such cords—products that are made specifically for use in the manufacture of pneumatic tires. By agreement, these test methods may be applied to similar glass yarns and cords used for reinforcing other rubber goods and for other industrial applications. The yarn or cord may be wound on cones, tubes, bobbins, spools, or beams, woven into fabric, or in other forms. These test methods include testing procedures only. These test methods do not include specifications or tolerances.
1.2 No procedure is included for the determination of fatigue resistance of cords, but several articles relating to the measurement of fatigue resistance of cords made from man-made filaments and cured in rubber were published in the bibliography of Test Methods D885.
1.3 The following sections are included:
Section
Adhesion of Cords to Elastomers
24
Breaking Strength (Force) of Conditioned Yarns and Cords
13
Breaking Tenacity of Conditioned Yarns and Cords
14
Catenary Length of Cords
Appendix X1
Conditioning
8
Construction of Yarns and Cords
18
Count of Tire Cord Fabric
22
Dip Pick-Up (DPU) on Yarns and Cords
23
Elongation at Break of Conditioned Yarns and Cords
15
Initial Modulus of Conditioned Yarns and Cords
16
Keywords
28
Mass of Tire Cord Fabric
22
Precision and Bias
25 – 27
Sampling of Yarn and Cord
6
Sampling of Tire Cord Fabric
7
Tensile Properties of Yarns and Cords
9 – 17
Terminology
3
Thickness of Cords
21
Twist in Yarns and Cords
20
Width of Tire Cord Fabric
22
Yarn Number of Dipped Yarns and Cords
19
1.4 These test methods show the values in both SI units and in 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.
1.5 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 ...
General Information
Standards Content (Sample)
NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
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Designation: D2970/D2970M − 04 (Reapproved 2014)
Standard Test Methods for
Testing Tire Cords, Tire Cord Fabrics, and Industrial Yarns
1
Made From Glass Filaments
This standard is issued under the fixed designation D2970/D2970M; 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 1.4 These test methods show the values in both SI units and
in inch-pound units. “SI units” is the technically correct name
1.1 These test methods cover the testing of industrial yarns
for the system of metric units known as the International
made of glass filaments, cords twisted from such yarns, and
System of Units. “Inch-pound units” is the technically correct
fabric woven from such cords—products that are made spe-
name for the customary units used in the United States. The
cifically for use in the manufacture of pneumatic tires. By
values stated in either acceptable metric units or other units
agreement, these test methods may be applied to similar glass
shall be regarded separately as standard. The values expressed
yarns and cords used for reinforcing other rubber goods and for
in each system may not be exact equivalents; therefore, each
other industrial applications. The yarn or cord may be wound
system must be used independently of each other without
on cones, tubes, bobbins, spools, or beams, woven into fabric,
combining values in any way.
or in other forms. These test methods include testing proce-
1.5 This standard does not purport to address all of the
dures only. These test methods do not include specifications or
safety concerns, if any, associated with its use. It is the
tolerances.
responsibility of the user of this standard to establish appro-
1.2 No procedure is included for the determination of
priate safety and health practices and determine the applica-
fatigue resistance of cords, but several articles relating to the
bility of regulatory limitations prior to use.
measurement of fatigue resistance of cords made from man-
made filaments and cured in rubber were published in the
2. Referenced Documents
bibliography of Test Methods D885.
2
2.1 ASTM Standards:
1.3 The following sections are included:
D76 Specification for Tensile Testing Machines for Textiles
Section
D123 Terminology Relating to Textiles
Adhesion of Cords to Elastomers 24
D578 Specification for Glass Fiber Strands
Breaking Strength (Force) of Conditioned Yarns and Cords 13
Breaking Tenacity of Conditioned Yarns and Cords 14 D885 Test Methods for Tire Cords, Tire Cord Fabrics, and
Catenary Length of Cords Appendix X1
Industrial Filament Yarns Made from Manufactured
Conditioning 8
Organic-Base Fibers
Construction of Yarns and Cords 18
Count of Tire Cord Fabric 22 D1423 Test Method for Twist in Yarns by Direct-Counting
Dip Pick-Up (DPU) on Yarns and Cords 23
D2258 Practice for Sampling Yarn for Testing
Elongation at Break of Conditioned Yarns and Cords 15
D4393 Test Method for Strap Peel Adhesion of Reinforcing
Initial Modulus of Conditioned Yarns and Cords 16
Keywords 28
Cords or Fabrics to Rubber Compounds
Mass of Tire Cord Fabric 22
D4848 Terminology Related to Force, Deformation and
Precision and Bias 25 – 27
Related Properties of Textiles
Sampling of Yarn and Cord 6
Sampling of Tire Cord Fabric 7
D6477 Terminology Relating to Tire Cord, Bead Wire, Hose
Tensile Properties of Yarns and Cords 9 – 17
Reinforcing Wire, and Fabrics
Terminology 3
Thickness of Cords 21
3. Terminology
Twist in Yarns and Cords 20
Width of Tire Cord Fabric 22
3.1 Definitions:
Yarn Number of Dipped Yarns and Cords 19
3.1.1 For definitions of terms related to tire cord, bead wire,
hose wire, and tire cord fabrics, refer to Terminology D6477.
1
These test methods are under the jurisdiction of ASTM Committee D13 on
Textiles and are the direct responsibility of Subcommittee D13.19 on Industrial
2
Fibers and Metallic Reinforcements. For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Current edition approved May 15, 2014. Published June 2014. Originally contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
approved in 1980. Last previous edition approved in 2010 as D2970/ Standards volume information, refer to the standard’s Document Summary page on
D2970M – 04(2010). DOI: 10.1520/D2970_D2970M-04R14. the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
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D2970/D2970M − 04 (2014)
3.1.1.1 The following terms are relevant to this standard” specification or Practice D2258. Preferably, the sam
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