ASTM D4776/D4776M-18
(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
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 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.
5.1.1 In cases of dispute arising from the differences in reported test results when using Test Method D4776 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.
5.2 This test method is used to measure the force required to extract the cord from a rubber compound test block.
5.3 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.
5.3.1 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.
5.4 The expec...
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 D2229.
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 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard.
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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
General Information
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This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation: D4776/D4776M − 18
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/D4776M; 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 2. Referenced Documents
2
1.1 This test method covers the measurement of adhesion of 2.1 ASTM Standards:
reinforcing cords that are bonded to rubber compounds. This D76 Specification for Tensile Testing Machines for Textiles
test method is applicable to textile cord structures from both D123 Terminology Relating to Textiles
natural and manmade fibers, other than steel. For adhesion D1566 Terminology Relating to Rubber
testing of steel tire cords, refer to Test Method D2229. D2229 Test Method for Adhesion Between Steel Tire Cords
and Rubber
1.2 This test method is primarily used to evaluate tire cords,
D6477 Terminology Relating to Tire Cord, Bead Wire, Hose
using a suitable tire cord adhesive and a suitable rubber
Reinforcing Wire, and Fabrics
compound. This test method is also used to evaluate (1) tire
cord adhesives, and (2) the process of adhesive reaction on the
3. Terminology
cord using one consistent form of tire cord and one consistent
3.1 Definitions:
rubber compound. This test method may be used to evaluate
3.1.1 Fordefinitionsoftermsrelatingtotirecord,beadwire,
cords in industrial hose and belting products and other cord
hose wire, and tire cord fabrics, refer to Terminology D6477.
reinforced rubber products.
3.1.1.1 The following terms are relevant to this standard:
1.3 The values stated in either SI units or inch-pound units
adhesion, adhesion, in tire fabrics, cord, curing, H-test
are to be regarded separately as standard. The values stated in
adhesion, industrial yarn, reinforcing cord, rubber, rubber
each system may not be exact equivalents; therefore, each
compound, as used in the manufacture of rubber articles,
system shall be used independently of the other. Combining
vulcanization.
values from the two systems may result in non-conformance
3.1.2 For definitions of other terms relating to rubber, refer
with the standard.
to Terminology D1566.
1.4 This standard does not purport to address all of the
3.1.3 For definitions of other textile terms related to textiles,
safety concerns, if any, associated with its use. It is the
refer to Terminology D123.
responsibility of the user of this standard to establish appro-
4. Summary of Test Method
priate safety, health, and environmental practices and deter-
mine the applicability of regulatory limitations prior to use.
4.1 A cord specimen is sandwiched between two layers of
1.5 This international standard was developed in accor-
rubber compound test stock in a form resembling an “H,”
dance with internationally recognized principles on standard-
placed in a heated mold, and cured at a specified temperature
ization established in the Decision on Principles for the
and pressure. The test specimen sandwich is then cut to create
Development of International Standards, Guides and Recom-
an H-test specimen consisting of a single cord with each end
mendations issued by the World Trade Organization Technical
embedded in the center of a tab end of the rubber test block
Barriers to Trade (TBT) Committee.
(Fig. 1). The test specimen is placed in the grips of the tensile
tester, and then the grips are separated. The maximum force
obtained is the H-test adhesion force.
1
This test method is under the jurisdiction ofASTM Committee D13 on Textiles
and is the direct responsibility of Subcommittee D13.19 on Industrial Fibers and
2
Metallic Reinforcements For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Current edition approved Jan. 1, 2018. Published February 2018. Originally contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
approved in 1988. Last previous edition approved in 2010 as D4776 – 10. DOI: Standards volume information, refer to the standard’s Document Summary page on
10.1520/D4776-18. the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
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D4776/D4776M − 18
5.3 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 ty
...
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.
Designation: D4776/D4776M − 10 D4776/D4776M − 18
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/D4776M; 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
1.1 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 D2229.
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 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each
system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the
two systems may result in non-conformance with the standard.
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 safety, health, and healthenvironmental practices and determine the
applicability of regulatory limitations prior to use.
1.5 This international standard was developed in accordance with internationally recognized principles on standardization
established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued
by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
2. Referenced Documents
2
2.1 ASTM Standards:
D76 Specification for Tensile Testing Machines for Textiles
D123 Terminology Relating to Textiles
D1566 Terminology Relating to Rubber
D2229 Test Method for Adhesion Between Steel Tire Cords and Rubber
D4393 Test Method for Strap Peel Adhesion of Reinforcing Cords or Fabrics to Rubber Compounds
D6477 Terminology Relating to Tire Cord, Bead Wire, Hose Reinforcing Wire, and Fabrics
3. Terminology
3.1 Definitions:
3.1.1 For defintionsdefinitions of terms relating to tire cord, bead wire, hose wire, and tire cord fabrics, refer to Terminology
D6477.
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 D1566.
3.1.3 For definitions of other textile terms related to textiles, refer to Terminology D123.
1
This test method is under the jurisdiction of ASTM Committee D13 on Textiles and is the direct responsibility of Subcommittee D13.19 on Industrial Fibers and Metallic
Reinforcements
Current edition approved Jan. 1, 2010Jan. 1, 2018. Published January 2010February 2018. Originally approved in 1988. Last previous edition approved in 20042010 as
ε1
D4776 – 04D4776 – 10. . DOI: 10.1520/D4776-10.10.1520/D4776-18.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
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 ----------------------
D4776/D4776M − 18
4. Summary of Test Method
4.1 A cord 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. 1). The test
specimen is placed in the gr
...
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