ASTM D2970/D2970M-98e1
(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
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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 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: 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 state 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.
General Information
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Standards Content (Sample)
e1
Designation: D 2970/D 2970M – 98
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 D 2970/D 2970M; 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
e NOTE—The designation was corrected in September 1999.
1. Scope
Thickness of Cords 21
Twist in Yarns and Cords 20
1.1 These test methods cover the testing of industrial yarns
Width of Tire Cord Fabric 22
made of glass filaments, cords twisted from such yarns, and
Yarn Number of Dipped Yarns and Cords 19
fabric woven from such cords—products that are made spe-
1.4 These test methods show the values in both SI units and
cifically for use in the manufacture of pneumatic tires. By
in inch-pound units. “SI units” is the technically correct name
agreement, these test methods may be applied to similar glass
for the system of metric units known as the International
yarns and cords used for reinforcing other rubber goods and for
System of Units.“ Inch-pound units” is the technically correct
other industrial applications. The yarn or cord may be wound
name for the customary units used in the United States. The
on cones, tubes, bobbins, spools, or beams, woven into fabric,
values stated in either acceptable metric units or other units
or in other forms. These test methods include testing proce-
shall be regarded separately as standard. The values expressed
dures only. These test methods do not include specifications or
in each system may not be exact equivalents; therefore, each
tolerances.
system must be used independently of each other without
1.2 No procedure is included for the determination of
combining values in any way.
fatigue resistance of cords, but several articles relating to the
1.5 This standard does not purport to address all of the
measurement of fatigue resistance of cords made from man-
safety concerns, if any, associated with its use. It is the
made filaments and cured in rubber were published in the
responsibility of the user of this standard to establish appro-
2
bibliography of Test Methods D 885.
priate safety and health practices and determine the applica-
1.3 The following sections are included:
bility of regulatory limitations prior to use.
Section
Adhesion of Cords to Elastomers 24
2. Referenced Documents
Breaking Strength (Force) of Conditioned Yarns and Cords 13
Breaking Tenacity of Conditioned Yarns and Cords 14
2.1 ASTM Standards:
Catenary Length of Cords Appendix X1
D 76 Specification for Tensile Testing Machines for Tex-
Conditioning 8
3
tiles
Construction of Yarns and Cords 18
3
Count of Tire Cord Fabric 22
D 123 Terminology Relating to Textile
Dip Pick-Up (DPU) on Yarns and Cords 23 3
D 578 Specification for Glass Fiber Strands
Elongation at Break of Conditioned Yarns and Cords 15
D 885 Methods of Testing Tire Cords, Tire Cord Fabrics,
Initial Modulus of Conditioned Yarns and Cords 16
Keywords 28
and Industrial Filament Yarns Made from Man-Made
Mass of Tire Cord Fabric 22
3
Organic-Base Fibers
Precision and Bias 25-27
D 1423 Test Method for Twist in Yarns by the Direct-
Sampling of Yarn and Cord 6
3
Sampling of Tire Cord Fabric 7
Counting Method
Tensile Properties of Yarns and Cords 9-17 3
D 2258 Practice for Sampling Yarn for Testing
Terminology 3
D 4393 Test Method for Strap Peel Adhesion of Reinforcing
4
Cords or Fabrics to Rubber Compounds
D 4848 Terminology of Force, and Deformation Properties
4
1
These test methods are under the jurisdiction of ASTM Committee D - 13 on of Textiles
Textiles and are the direct responsibility of Subcommittee D13.19 on Tire Cord and
Fabrics.
3. Terminology
Current edition approved Sept. 10, 1998. Published March, 1999. Originally
3.1 Definitions:
published as D 2970M – 80. Discontinued November 1995 and reinstated as
D 2970 – 95. 3.1.1 breaking force, n—the maximum force applied to a
NOTE: D 2970 and D 2970 M were combined editorially with no change in
technical requirements in September, 1998.
2 3
1967 Annual Book of ASTM Standards, Part 24, and earlier issues of Test Annual Book of ASTM Standards, Vol 07.01.
4
Method D 885. Annual Book of ASTM Standards, Vol 07.02.
Copyright © ASTM, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959, United States.
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D 2970/D 2970M
material carried to rupture. 3.1.12.1 Discussion—Technically, strength is a characteris-
tic that is expressed in terms of force. Historically, however,
3.1.1.1 Discussion—Materials that are brittle usually rup-
tensile strength has been commonly expressed in terms of force
ture at the maximum force. Materials that are ductile usually
experience a maximum force before rupturing. It has been the per unit base; for exa
...
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