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ASTM D4776-02

(Test Method)

Standard Test Method for Adhesion of Tire Cords and Other Reinforcing Cords to Rubber Compounds by H-Test Procedure

Standard Test Method for Adhesion of Tire Cords and Other Reinforcing Cords to Rubber Compounds by H-Test Procedure

SCOPE
1.1 This test method covers the measurement of adhesion of reinforcing cords that are bonded to rubber compounds. This test method is applicable to textile cord structures from both natural and manmade fibers, other than steel. For adhesion testing of steel tire cords, refer to Test Method D 2229.
1.2 This test method is primarily used to evaluate tire cords, using a suitable tire cord adhesive and a suitable rubber compound. This test method is also used to evaluate (1) tire cord adhesives, and (2) the process of adhesive reaction on the cord using one consistent form of tire cord and one consistent rubber compound. This test method may be used to evaluate cords in industrial hose and belting products and other cord reinforced rubber products.
1.3 This test method is written in SI units. The inch-pound units which are provided in this test method are not necessarily exact equivalents of the SI units. Either system may be used in this test method.
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.

General Information

Status
Historical
Publication Date
09-Sep-2002
ICS
83.160.01 - Tyres in general
Technical Committee
D13 - Textiles
Drafting Committee
D13.19 - Industrial Fibers and Metallic Reinforcements
Current Stage
Ref Project

Relations

Replaces
ASTM D4776-98 - Standard Test Method for Adhesion of Tire Cords and Other Reinforcing Cords to Rubber Compounds by H-Test Procedure
Effective Date
10-Sep-2002
Replaced By
ASTM D4776-04 - Standard Test Method for Adhesion of Tire Cords and Other Reinforcing Cords to Rubber Compounds by H-Test Procedure
Effective Date
01-Oct-2004

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ASTM D4776-02 - Standard Test Method for Adhesion of Tire Cords and Other Reinforcing Cords to Rubber Compounds by H-Test ProcedureASTM D4776-02 - Standard Test Method for Adhesion of Tire Cords and Other Reinforcing Cords to Rubber Compounds by H-Test Procedure
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ASTM D4776-02 - Standard Test Method for Adhesion of Tire Cords and Other Reinforcing Cords to Rubber Compounds by H-Test Procedure
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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: D 4776 – 02
Standard Test Method for
Adhesion of Tire Cords and Other Reinforcing Cords to
1
Rubber Compounds by H-Test Procedure
This standard is issued under the fixed designation D 4776; 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. Scope 3. Terminology
1.1 This test method covers the measurement of adhesion of 3.1 Definitions:
reinforcing cords that are bonded to rubber compounds. This 3.1.1 For defintions of terms relating to tire cord, bead wire,
test method is applicable to textile cord structures from both hose reinforcing wire, and tire cord fabrics, refer to Terminol-
natural and manmade fibers, other than steel. For adhesion ogy D 6477.
testing of steel tire cords, refer to Test Method D 2229. 3.1.2 For definitions of other textile terms used in this
1.2 This test method is primarily used to evaluate tire cords, standard, refer to Terminology D 123.
using a suitable tire cord adhesive and a suitable rubber 3.1.3 For definitions of other terms relating to rubber, refer
compound. This test method is also used to evaluate (1) tire to Terminology D 1566.
cord adhesives, and (2) the process of adhesive reaction on the
4. Summary of Test Method
cord using one consistent form of tire cord and one consistent
rubber compound. This test method may be used to evaluate 4.1 A cord specimen is sandwiched between two layers of
rubber compound test stock in a form resembling an “H,”
cords in industrial hose and belting products and other cord
reinforced rubber products. placed in a heated mold, and cured at a specified temperature
and pressure. The test specimen sandwich is then cut to create
1.3 This test method is written in SI units. The inch-pound
units which are provided in this test method are not necessarily an H-test specimen consisting of a single cord with each end
embedded in the center of a tab end of the rubber test block
exact equivalents of the SI units. Either system may be used in
this test method. (Fig. 1). The test specimen is placed in the grips of the tensile
tester, and then the grips are separated. The maximum force
1.4 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the obtained is the H-test adhesion force.
responsibility of the user of this standard to establish appro-
5. Significance and Use
priate safety and health practices and determine the applica-
5.1 Test Method D 4776 for the determination of the H-test
bility of regulatory limitations prior to use.
adhesion of reinforcing cords to rubber compounds may be
2. Referenced Documents
used for the acceptance testing of commercial shipments of
reinforcing cords but caution is advised since information
2.1 ASTM Standards:
D 76 Specification for Tensile Testing Machines for Tex- about between-laboratory precision is incomplete. Compara-
2
tive tests as directed in 5.1.1 may be advisable.
tiles
2
D 123 Terminology Relating to Textiles 5.1.1 In cases of dispute arising from the differences in
3
D 1566 Terminology Relating to Rubber reported test results when using Test Method D 4776 for
acceptance testing of commercial shipments, the purchaser and
D 2229 Test Method for Adhesion Between Steel Tire
2
Cords and Rubber the supplier should conduct comparative tests to determine if
there is statistical bias between their laboratories. Competent
D 4393 Test Method for Strap Peel Adhesion of Reinforcing
4
Cords or Fabrics to Rubber Compounds statistical assistance is recommended for the investigation of
bias. As a minimum, the two parties should take a group of test
D 6477 Terminology Relating to Tire Cords, Bead Wire,
4
Hose Reinforcing Wire, and Fabrics specimens which are as homogeneous as possible and which
are from a lot of material of the type in question. The test
specimens should then be randomly assigned in equal numbers
1
This test method is under the jurisdiction of ASTM Committee D13 on Textiles
to each laboratory for testing. The average results from the two
and is the direct responsibility of Subcommittee D13.19 on Tire Cord and Fabrics.
laboratories should be compared using Student’s t-test for
Current edition approved Sept. 10, 2002. Published October 2002. Originally
unpaired data and an acceptable probability level chosen by the
published as D 4776 – 88. Last previous edition D 4776 – 98.
2
Annual Book of ASTM Standards, Vol 07.01.
3
Annual Book of ASTM Standards, Vol 09.01.
4
Annual Book of ASTM Standards, Vol 07.02.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1

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