ASTM D2970/D2970M-04(2010)
(Test Method)Standard Test Method for Testing Tire Cords, Tire Cord Fabrics, and Industrial Yarns Made From Glass Filaments
Standard Test Method for Testing Tire Cords, Tire Cord Fabrics, and Industrial Yarns Made From Glass Filaments
SIGNIFICANCE AND USE
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.
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.
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.
General Information
Relations
Standards Content (Sample)
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Designation: D2970/D2970M − 04(Reapproved 2010)
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
Yarn Number of Dipped Yarns and Cords 19
1.1 These test methods cover the testing of industrial yarns 1.4 These test methods show the values in both SI units and
in inch-pound units. “SI units” is the technically correct name
made of glass filaments, cords twisted from such yarns, and
fabric woven from such cords—products that are made spe- for the system of metric units known as the International
System of Units. “Inch-pound units” is the technically correct
cifically for use in the manufacture of pneumatic tires. By
agreement, these test methods may be applied to similar glass name for the customary units used in the United States. The
values stated in either acceptable metric units or other units
yarnsandcordsusedforreinforcingotherrubbergoodsandfor
other industrial applications. The yarn or cord may be wound shall be regarded separately as standard. The values expressed
in each system may not be exact equivalents; therefore, each
on cones, tubes, bobbins, spools, or beams, woven into fabric,
or in other forms. These test methods include testing proce- system must be used independently of each other without
combining values in any way.
dures only. These test methods do not include specifications or
tolerances.
1.5 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
1.2 No procedure is included for the determination of
responsibility of the user of this standard to establish appro-
fatigue resistance of cords, but several articles relating to the
priate safety and health practices and determine the applica-
measurement of fatigue resistance of cords made from man-
bility of regulatory limitations prior to use.
made filaments and cured in rubber were published in the
bibliography of Test Methods D885.
2. Referenced Documents
1.3 The following sections are included:
2
2.1 ASTM Standards:
Section
D76 Specification for Tensile Testing Machines for Textiles
Adhesion of Cords to Elastomers 24
Breaking Strength (Force) of Conditioned Yarns and Cords 13
D123 Terminology Relating to Textiles
Breaking Tenacity of Conditioned Yarns and Cords 14
D578 Specification for Glass Fiber Strands
Catenary Length of Cords Appendix X1
Conditioning 8 D885 Test Methods for Tire Cords, Tire Cord Fabrics, and
Construction of Yarns and Cords 18
Industrial Filament Yarns Made from Manufactured
Count of Tire Cord Fabric 22
Organic-Base Fibers
Dip Pick-Up (DPU) on Yarns and Cords 23
D1423 Test Method for Twist in Yarns by Direct-Counting
Elongation at Break of Conditioned Yarns and Cords 15
Initial Modulus of Conditioned Yarns and Cords 16
D2258 Practice for Sampling Yarn for Testing
Keywords 28
D4393 Test Method for Strap Peel Adhesion of Reinforcing
Mass of Tire Cord Fabric 22
Precision and Bias 25–27 Cords or Fabrics to Rubber Compounds
Sampling of Yarn and Cord 6
D4848 Terminology Related to Force, Deformation and
Sampling of Tire Cord Fabric 7
Related Properties of Textiles
Tensile Properties of Yarns and Cords 9–17
Terminology 3 D6477 Terminology Relating to Tire Cord, Bead Wire, Hose
Thickness of Cords 21
Reinforcing Wire, and Fabrics
Twist in Yarns and Cords 20
Width of Tire Cord Fabric 22
3. Terminology
3.1 Definitions:
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
Fibers and Metallic Reinforcements.
2
Current edition approved Jan. 1, 2010. Published March 2010. Originally For referenced ASTM standards, visit the ASTM website, www.astm.org, or
approved in 1980. Discontinued November 1995 and reinstated as D2970 – 95. Last contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
previous edition approved in 2004 as D2970/D2970M – 04. DOI: 10.1520/D2970 Standards volume information, refer to the standard’s Document Summary page on
_D2970M-04R10. 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 (2010)
3.1.1 For definitions of terms related to tire cord, bead wire, shipping case in the lot sample. Take the number of packages
hose wire, and tire cord fabrics, refer to Terminology D6477. for the laboratory sam
...
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