ASTM D4776/D4776M-10
(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 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.
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.
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 charact...
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 and health practices and determine the applicability of regulatory limitations prior to use.
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Designation: D4776/D4776M − 10
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 D2229 Test Method for Adhesion Between Steel Tire Cords
and Rubber
1.1 This test method covers the measurement of adhesion of
D4393 Test Method for Strap Peel Adhesion of Reinforcing
reinforcing cords that are bonded to rubber compounds. This
Cords or Fabrics to Rubber Compounds
test method is applicable to textile cord structures from both
D6477 Terminology Relating to Tire Cord, Bead Wire, Hose
natural and manmade fibers, other than steel. For adhesion
Reinforcing Wire, and Fabrics
testing of steel tire cords, refer to Test Method D2229.
1.2 This test method is primarily used to evaluate tire cords,
3. Terminology
using a suitable tire cord adhesive and a suitable rubber
3.1 Definitions:
compound. This test method is also used to evaluate (1) tire
3.1.1 For defintions of terms relating to tire cord, bead wire,
cord adhesives, and (2) the process of adhesive reaction on the
hose wire, and tire cord fabrics, refer to Terminology D6477.
cord using one consistent form of tire cord and one consistent
3.1.1.1 The following terms are relevant to this standard:
rubber compound. This test method may be used to evaluate
adhesion, adhesion, in tire fabrics, cord, curing, H-test
cords in industrial hose and belting products and other cord
adhesion, industrial yarn, reinforcing cord, rubber, rubber
reinforced rubber products.
compound, as used in the manufacture of rubber articles,
1.3 The values stated in either SI units or inch-pound units
vulcanization.
are to be regarded separately as standard. The values stated in
3.1.2 For definitions of other terms relating to rubber, refer
each system may not be exact equivalents; therefore, each
to Terminology D1566.
system shall be used independently of the other. Combining
3.1.3 For definitions of other textile terms related to textiles,
values from the two systems may result in non-conformance
refer to Terminology D123.
with the standard.
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
embedded in the center of a tab end of the rubber test block
2
(Fig. 1). The test specimen is placed in the grips of the tensile
2.1 ASTM Standards:
D76 Specification for Tensile Testing Machines for Textiles tester, and then the grips are separated. The maximum force
obtained is the H-test adhesion force.
D123 Terminology Relating to Textiles
D1566 Terminology Relating to Rubber
5. Significance and Use
5.1 Test Method D4776 for the determination of the H-test
1
This test method is under the jurisdiction ofASTM Committee D13 on Textiles
adhesion of reinforcing cords to rubber compounds may be
and is the direct responsibility of Subcommittee D13.19 on Industrial Fibers and
used for the acceptance testing of commercial shipments of
Metallic Reinforcements
reinforcing cords but caution is advised since information
Current edition approved Jan. 1, 2010. Published January 2010. Originally
ε1
about between-laboratory precision is incomplete. Compara-
approved in 1988. Last previous edition approved in 2004 as D4776 – 04 . DOI:
10.1520/D4776-10.
tive tests as directed in 5.1.1 may be advisable.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
5.1.1 In cases of dispute arising from the differences in
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
reported test results when using Test Method D4776 for
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. acceptance testing of commercial shipments, the purchaser and
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
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D4776/D4776M − 10
5.4 Theexpectedrangeofvalueswhichcharacterizeaccept-
ab
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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.
´1
Designation:D4776–04 Designation:D4776/D4776M–10
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
1
reapproval. A superscript epsilon (´) indicates an editorial change since the last revision or reapproval. ´ NOTE—Editorial corrections
were made in 6.3 and in Fig. 1(a) in January 2009.
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.
1.3This 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.
1.3 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 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
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 defintions 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.
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
1
This test method is under the jurisdiction of ASTM Committee D13 on Textiles and is the direct responsibility of Subcommittee D13.19 on Tire Cord and Fabrics
Current edition approved Oct. 1, 2004. Published October 2004. Originally approved in 1988. Last previous edition approved in 2002 as D4776–02. DOI:
10.1520/D4776-04E01.
´1
Current edition approved Jan. 1, 2010. Published January 2010. Originally approved in 1988. Last previous edition approved in 2004 as D4776 – 04 . DOI:
10.1520/D4776-04E01.
2
For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM 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
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D4776/D4776M–10
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 t
...
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