ASTM D4776-04e1
(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
SIGNIFICANCE AND USE
Test Method D 4776 for the determination of the H-test adhesion of reinforcing cords to rubber compounds may be used for the acceptance testing of commercial shipments of reinforcing cords but caution is advised since information about between-laboratory precision is incomplete. Comparative tests as directed in 5.1.1 may be advisable.
In cases of dispute arising from the differences in reported test results when using Test Method D 4776 for acceptance testing of commercial shipments, the purchaser and the supplier should conduct comparative tests to determine if there is statistical bias between their laboratories. Competent statistical assistance is recommended for the investigation of bias. As a minimum, the two parties should take a group of test 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 to each laboratory for testing. The average results from the two laboratories should be compared using Student's t-test for unpaired data and an acceptable probability level chosen by the two parties before testing begins. If a bias is found, either its cause must be found and corrected or the purchaser and the supplier must agree to interpret future test results in light of the known bias.
This test method is used to measure the force required to extract the cord from a rubber compound test block.
This test method is designed to test the adhesion of textiles that are bonded to rubber compounds. Variables that may contribute to differences in results of this test method include adhesive type, adhesive application procedure, adhesive cure, fiber type, construction of cords, rubber type, rubber cure, and rubber thickness.
The deleterious effect of ozone in combination with atmospheric moisture on the ability of adhesives to bond with rubber requires assiduous protection of cords prior to embedment.
The expected range of values which chara...
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.
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Designation:D4776–04
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 D4776; 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
´ NOTE—Editorial corrections were made in 6.3 and in Fig. 1(a) in January 2009.
1. Scope D4393 Test Method for Strap PeelAdhesion of Reinforcing
Cords or Fabrics to Rubber Compounds
1.1 This test method covers the measurement of adhesion of
D6477 Terminology Relating to Tire Cord, Bead Wire,
reinforcing cords that are bonded to rubber compounds. This
Hose Reinforcing Wire, and Fabrics
test method is applicable to textile cord structures from both
natural and manmade fibers, other than steel. For adhesion
3. Terminology
testing of steel tire cords, refer to Test Method D2229.
3.1 Definitions:
1.2 This test method is primarily used to evaluate tire cords,
3.1.1 For defintions of terms relating to tire cord, bead wire,
using a suitable tire cord adhesive and a suitable rubber
hose wire, and tire cord fabrics, refer to Terminology D6477.
compound. This test method is also used to evaluate (1) tire
3.1.1.1 The following terms are relevant to this standard:
cord adhesives, and (2) the process of adhesive reaction on the
adhesion, adhesion, in tire fabrics, cord, curing, H-test adhe-
cord using one consistent form of tire cord and one consistent
sion, industrial yarn, reinforcing cord, rubber, rubber com-
rubber compound. This test method may be used to evaluate
pound, as used in the manufacture of rubber articles, vulcani-
cords in industrial hose and belting products and other cord
zation.
reinforced rubber products.
3.1.2 For definitions of other terms relating to rubber, refer
1.3 This test method is written in SI units. The inch-pound
to Terminology D1566.
units which are provided in this test method are not necessarily
3.1.3 For definitions of other textile terms related to textiles,
exact equivalents of the SI units. Either system may be used in
refer to Terminology D123.
this test method.
1.4 This standard does not purport to address all of the
4. Summary of Test Method
safety concerns, if any, associated with its use. It is the
4.1 A cord specimen is sandwiched between two layers of
responsibility of the user of this standard to establish appro-
rubber compound test stock in a form resembling an “H,”
priate safety and health practices and determine the applica-
placed in a heated mold, and cured at a specified temperature
bility of regulatory limitations prior to use.
and pressure. The test specimen sandwich is then cut to create
an H-test specimen consisting of a single cord with each end
2. Referenced Documents
2 embedded in the center of a tab end of the rubber test block
2.1 ASTM Standards:
(Fig. 2). The test specimen is placed in the grips of the tensile
D76 Specification for Tensile Testing Machines for Textiles
tester, and then the grips are separated. The maximum force
D123 Terminology Relating to Textiles
obtained is the H-test adhesion force.
D1566 Terminology Relating to Rubber
D2229 Test Method forAdhesion Between Steel Tire Cords
5. Significance and Use
and Rubber
5.1 Test Method D4776 for the determination of the H-test
adhesion of reinforcing cords to rubber compounds may be
used for the acceptance testing of commercial shipments of
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This test method is under the jurisdiction ofASTM Committee D13 onTextiles
reinforcing cords but caution is advised since information
and is the direct responsibility of Subcommittee D13.19 on Tire Cord and Fabrics
about between-laboratory precision is incomplete. Compara-
Current edition approved Oct. 1, 2004. Published October 2004. Originally
tive tests as directed in 5.1.1 may be advisable.
approved in 1988. Last previous edition approved in 2002 as D4776 – 02. DOI:
10.1520/D4776-04E01.
5.1.1 In cases of dispute arising from the differences in
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
reported test results when using Test Method D4776 for
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
acceptance testing of commercial shipments, the purchaser and
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. the supplier should conduct comparative tests to determine if
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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D4776–04
NOTE 1—The mold as shown will produce 30 specimens. It may be
f
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This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
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Designation:D4776–02 Designation:D4776–04
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 (´) indicates an editorial change since the last revision or reapproval.
1
´ NOTE—Editorial corrections were made in 6.3 and in Fig. 1(a).
1. 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.
2. Referenced Documents
2
2.1 ASTM Standards:
D76 Specification for Tensile Testing Machines for Textiles
D 123 Terminology Relating to Textiles
D 1566 Terminology Relating to Rubber
D 2229 Test Method for Adhesion Between Steel Tire Cords and Rubber
D 4393 Test Method for Strap Peel Adhesion of Reinforcing Cords or Fabrics to Rubber Compounds
D 6477 Terminology Relating to Tire Cords, Bead Wire, Hose Reinforcing Wire, and Fabrics
3. Terminology
3.1 Definitions:
3.1.1 For defintions of terms relating to tire cord, bead wire, hose reinforcing wire, and tire cord fabrics, refer to Terminology
D 6477.
3.1.2For definitions of other textile terms used in this standard, refer to Terminology D123
3.1.1.1 The following terms are relevant to this standard: adhesion, adhesion, in tire fabrics, cord, curing, H-test adhesion,
industrial yarn, reinforcing cord, rubber, rubber compound, as used in the manufacture of rubber articles, vulcanization.
3.1.2 For definitions of other terms relating to rubber, refer to Terminology D 1566.
3.1.3 For definitions of other textile terms relatingrelated to rubber,textiles, refer to Terminology D1566D 123.
4. Summary of Test Method
4.1 Acord specimen is sandwiched between two layers of rubber compound test stock in a form resembling an “H,” placed in
a heated mold, and cured at a specified temperature and pressure. The test specimen sandwich is then cut to create 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 (Fig. 1Fig. 2). The
1
This test method is under the jurisdiction ofASTM Committee D13 onTextiles and is the direct responsibility of Subcommittee D13.19 onTire Cord and Fabrics.Fabrics
Current edition approved Sept. 10, 2002.Oct. 1, 2004. Published October 2002.2004. Originally published as D4776–88.approved in 1988. Last previous edition
D4776–98.approved in 2002 as D 4776 – 02.
2
For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
, Vol 07.01.volume information, refer to the standard’s Document Summary page on the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1
---------------------- Page: 1 ----------------------
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D4776–04
NOTE 1—The mold as shown will produce 30 specimens. It may be
fabricated to produce a larger or smaller number, but the dimensions that
govern the specimen size shall not be altered.
NOTE 2—A mold cover plate must be provided. It should be 9.5 mm
(.38in.)thickandthesameoutsidedimensions(“K”and“L”)asthemold.
NOTE 3—Mold dimension tolerances are XX.X mm 6 .3 mm
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