ASTM D1871-02
(Test Method)Standard Test Method for Adhesion Between Tire Bead Wire and Rubber
Standard Test Method for Adhesion Between Tire Bead Wire and Rubber
SCOPE
1.1 This test method cover procedures for testing the strength of adhesion of single-filament wire to vulcanized rubber compounds. The method applies to, but is not limited to, wire made from brass, bronze, or zinc coated steel wire. The adhesion strength is expressed as the magnitude of the pull-out force for the single filament of wire.
1.2 This test method is applicable to single-filament wires used in reinforced rubber products as single filaments and is normally used to evaluate the adhesion of samples of wire to a standard rubber applied under specified conditions. It is primarily used to evaluate tire bead wire and may be applied, with modifications and by agreement between supplier and customer, to various wire types used in rubber product reinforcing.
1.3 This test method is written in SI units.
1.4 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. See 6.5.1.
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Standards Content (Sample)
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Designation: D 1871 – 02
Standard Test Method for
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Adhesion Between Tire Bead Wire and Rubber
This standard is issued under the fixed designation D 1871; 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.
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1. Scope E 456 Terminology Relating to Quality and Statistics
1.1 This test method cover procedures for testing the
3. Terminology
strength of adhesion of single-filament wire to vulcanized
3.1 Definitions:
rubber compounds. The method applies to, but is not limited to,
3.1.1 For definitions of bead wire terms used in this test
wire made from brass, bronze, or zinc coated steel wire. The
method, refer to Terminology D 6477
adhesion strength is expressed as the magnitude of the pull-out
3.1.2 For definitions of other rubber terms used in these test
force for the single filament of wire.
methods, refer to Terminology D 1566
1.2 This test method is applicable to single-filament wires
3.1.3 For terminology on testing and statistical concepts,
used in reinforced rubber products as single filaments and is
refer to Terminology D 4392 or D 456.
normally used to evaluate the adhesion of samples of wire to a
3.1.4 For definitions of textile terms used in these test
standard rubber applied under specified conditions. It is prima-
methods, refer to Terminology D 123.
rily used to evaluate tire bead wire and may be applied, with
modifications and by agreement between supplier and cus-
4. Summary of Test Methods
tomer, to various wire types used in rubber product reinforcing.
4.1 The wires are vulcanized into a block or pad of rubber
1.3 This test method is written in SI units.
and the force necessary to pull the wires out of the rubber is
1.4 This standard does not purport to address all of the
measured. The direction of pull-out is axial, that is, along the
safety concerns, if any, associated with its use. It is the
wire.
responsibility of the user of this standard to establish appro-
priate safety and health practices and determine the applica-
5. Significance and Use
bility of regulatory limitations prior to use. See 6.5.1.
5.1 To contribute to the mechanical properties required in a
product, tire bead wire must have good adhesion to the rubber
2. Referenced Documents
matrix. This allows the rubber to absorb part of the energy,
2.1 ASTM Standards:
distributing it uniformly between the reinforcing material and
D 76 Specification for Tensile Testing Machines for Tex-
2 the rubber compound. This test method is considered satisfac-
tiles
tory for acceptance testing of commercial shipments of wire
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D 123 Terminology Relating to Textiles
3 since it has been used extensively in the trade for this purpose.
D 1566 Terminology Relating to Rubber
This test method may be used for purchase specification
D 2906 Practice for Statements on Precision and Bias for
2 requirements or manufacturing control of bead wire.
Textiles
5.1.1 If there are differences of practical significance be-
D 3182 Practice for Rubber—Materials, Equipment, and
tween reported test results for two laboratories (or more),
Procedures for Mixing Standard Compounds and Prepar-
comparative tests should be performed to determine if there is
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ing Standard Vulcanized Sheets
4 a statistical bias between them, using competent statistical
D 4392 Terminology for Statistically Related Terms
assistance. As a minimum, test samples should be used that are
D 6477 Terminology Relating to Tire Cord, Bead Wire,
5 as homogeneous as possible, that are drawn from the material
Hose Reinforcing Wire, and Fabrics
from which the disparate test results were obtained, and that
are randomly assigned in equal numbers to each laboratory for
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testing. Other materials with established test values may be
Thistest method is under the jurisdiction of ASTM Committee D13 on Textiles
and are the direct responsibility of Subcommittee D13.19 on Tire Cord and Fabric.
used for this purpose. The test results from the two laboratories
Current edition approved Sept. 10, 2002. Published Octber 2002. Originally
should be compared using a statistical test for unpaired data, at
published as D 1871 – 61 T. Last previous edition D 1871 – 98.
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Annual Book of ASTM Standards, Vol 07.01.
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Annual Book of ASTM Standards, Vol 09.01.
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Discontinued 1993—See 1992 Annual Book of ASTM Standards, Vol 07.02.
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Annual Book of ASTM Standards, Vol 07.02. Annual Book of ASTM Standards, Vol 14.02.
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D1871–02
a probability level chosen prior to the testin
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