ASTM D2970/D2970M-04
(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.
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.
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 D 885.
1.3 The following sections are included: SectionAdhesion of Cords to Elastomers24Breaking Strength (Force) of Conditioned Yarns and Cords13Breaking Tenacity of Conditioned Yarns and Cords14Catenary Length of CordsAppendix X1Conditioning8Construction of Yarns and Cords18Count of Tire Cord Fabric22Dip Pick-Up (DPU) on Yarns and Cords23Elongation at Break of Conditioned Yarns and Cords15Initial Modulus of Conditioned Yarns and Cords16Keywords28Mass of Tire Cord Fabric22Precision and Bias25-27Sampling of Yarn and Cord6Sampling of Tire Cord Fabric7Tensile Properties of Yarns and Cords9-17Terminology3Thickness of Cords21Twist in Yarns and Cords20Width of Tire Cord Fabric22Yarn Number of Dipped Yarns and Cords19
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 the applicability of regulatory limitations prior to use.
1.5 These tests are used to determine the tensile properties of yarns and cords.
General Information
Relations
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:D2970/D2970M–04
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
yarnsandcordsusedforreinforcingotherrubbergoodsandfor
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
Breaking Strength (Force) of Conditioned Yarns and Cords 13
D578 Specification for Glass Fiber Strands
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
Construction of Yarns and Cords 18
Organic-Base Fibers
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
Initial Modulus of Conditioned Yarns and Cords 16
D4393 Test Method for Strap PeelAdhesion of Reinforcing
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
Sampling of Yarn and Cord 6
Related Properties of Textiles
Sampling of Tire Cord Fabric 7
D6477 Terminology Relating to Tire Cord, Bead Wire,
Tensile Properties of Yarns and Cords 9-17
Hose Reinforcing Wire, and Fabrics
Terminology 3
Thickness of Cords 21
Twist in Yarns and Cords 20
3. Terminology
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 Tire Cord and
Fabrics.
2
Current edition approved Oct. 1, 2004. Published October 2004. Originally For referenced ASTM standards, visit the ASTM website, www.astm.org, or
published as D2970M – 80. Discontinued November 1995 and reinstated as contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
D2970 – 95. Last previous edition D2970/D2970M – 02. DOI: 10.1520/ Standards volume information, refer to the standard’s Document Summary page on
D2970_D2970M-04. 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
3.1.1.1 The following terms are relevant to this standard” of packages should be taken from each shipping case in the lot
catenary length, cord twis
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