ASTM D6770-07
(Test Method)Standard Test Method for Abrasion Resistance of Textile Webbing (Hex Bar Method)
Standard Test Method for Abrasion Resistance of Textile Webbing (Hex Bar Method)
SCOPE
1.1 This test method covers the determination of abrasion resistance of textile webbing using a hex bar abrasion tester.
1.1.1 The resistance is expressed as a percentage of retained break strength.
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: D6770 – 07
Standard Test Method for
1
Abrasion Resistance of Textile Webbing (Hex Bar Method)
This standard is issued under the fixed designation D6770; 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 4. Summary of Test Method
1.1 This test method covers the determination of abrasion 4.1 Abrasion resistance is measured by subjecting the speci-
resistance of textile webbing using a hex bar abrasion tester. men to unidirectional reciprocal rubbing over a specific bar
1.1.1 The resistance is expressed as a percentage of retained under specified conditions of tension, stroke length and time.
break strength. Resistance to abrasion is evaluated by determining the percent
1.2 This standard does not purport to address all of the retention of breaking force of an abraded specimen compared
safety concerns, if any, associated with its use. It is the to an unabraded specimen.
responsibility of the user of this standard to establish appro-
5. Significance and Use
priate safety and health practices and determine the applica-
bility of regulatory limitations prior to use. 5.1 The measurement of the resistance to abrasion of textile
webbing is very complex.The resistance to abrasion is affected
2. Referenced Documents
bymanyfactorsthatincludetheinherentmechanicalproperties
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2.1 ASTM Standards: of the fibers; the dimensions of the fibers; the structure of the
D123 Terminology Relating to Textiles yarns; the construction of the webbing; the type, kind, and
D1776 Practice for Conditioning and Testing Textiles amount of treatment added to the fibers, yarns, or webbing; the
D4850 Terminology Relating to Fabrics and Fabric Test nature of the abradant; the variable action of the abradant over
Methods the specimen area abraded; the tension on the specimen; the
2.2 Other Standard: pressure between the specimen and the abradant; and the
Federal Standard 191, Method 4108 “Strength and Elonga- dimensional changes in the specimen.
tion, Breaking; Textile Webbing, Tape and Braided 5.2 The resistance of textile webbing to abrasion as mea-
3
Items” sured by this test method does not include all the factors which
accountforwearperformanceordurabilityinactualuse.While
3. Terminology
the abrasion resistance stated in terms of the number of cycles
3.1 For all terminology relating to Fabrics, refer to Termi- and durability (defined as the ability to withstand deterioration
nology D4850.
or wearing out in use, including the effects of abrasion) are
3.1.1 The following terms are relevant to this standard: frequently related, the relationship varies with different end
abrasion, abrasion cycle, in abrasion testing, breaking force,
uses. Different factors may be necessary in any calculation of
standard atmosphere for preconditioning textiles, standard predicted durability from specific abrasion data.
atmosphere for testing textiles, stroke, in hex bar abrasion
5.3 Laboratory tests may be reliable as an indication of
testing, webbing, in textiles relative end use in cases where the difference in abrasion
3.2 For all other terminology related to textiles, refer to
resistance of various materials is large, but they should not be
Terminology D123. relied upon where differences in laboratory test findings are
small. In general, the results should not be relied upon for
prediction of performance during actual wear life for specific
1
This test method is under the jurisdiction ofASTM Committee D13 onTextiles
end uses unless there are data showing the specific relationship
and is the direct responsibility of Subcommittee D13.60 on Fabric Test Methods,
Specific. between laboratory abrasion tests and actual wear in the
Current edition approved July 1, 2007. Published August 2007. Originally
intended end use.
e2
approved in 2002. Last previous edition approved in 2002 as D6770–02 . DOI:
5.4 While there has not been extensive interlaboratory
10.1520/D6770-07.
2
testing prior to development of this standard, there has been
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
some quality control testing by manufacturers.An intralabora-
Standards volume information, refer to the standard’s Document Summary page on
tory test was conducted to initiate this test method, using a
the ASTM website.
3 single product. This data will be used to determine a prelimi-
Available from Superintendent of Documents, Government Printing Office,
nary statement on precision and bias. Subsequent to approval
Washington, DC 20402.
Copyright © ASTM International, 100 Barr H
...
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.
e1
Designation:D6770–02 Designation: D 6770 – 07
Standard Test Method for
1
Abrasion Resistance of Textile Webbing (Hex Bar Method)
This standard is issued under the fixed designation D 6770; 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
e NOTE—Figure 1 was corrected editorially in May 2002.
1. Scope
1.1 This test method covers the determination of abrasion resistance of textile webbing using a hex bar abrasion tester.
1.1.1 The resistance is expressed as a percentage of retained break strength.
1.2The values stated in either SI units or inch-pound units are to be regarded separately as the standard. Within the text, the
inch-pound units are shown in parentheses. 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 nonconformance with this test
method.
1.3
1.2 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:
D 123 Terminology Relating to Textiles
2
D 1776Practice for Conditioning and Testing Textiles Practice for Conditioning and Testing Textiles
D 4850 Terminology Relating to Fabric
2.2 Other Standard:
3
Federal Standard 191, Method 4108 “Strength and Elongation, Breaking; Textile Webbing, Tape and Braided Items”
3. Terminology
3.1Definitions:
3.1.1abrasion, n—the wearing away of any part of a material by rubbing against another surface.
3.1.2abrasion cycle, n—one or more movements of an abradant across a material surface, or the material surface across the
abradant, that permits a return to its starting position.
3.1.2.1Discussion—The abrasion cycle is dependent on the programmed motions of the abrasion machine and the test standard
used. It may consist of one back-and-forth unidirectional movement or one circular movement, or a combination of both. For the
hex bar abrasion method a cycle is comprised of two strokes.
3.1.3breaking force, n—the maximum force applied to a material carried to rupture. (Compare breaking point, breaking
strength.)
3.1.4standard atmosphere for preconditioning textiles, n—a set of controlled conditions having a temperature not over 50°C
(122°F), with respective tolerance of 61°C (2°F), and a relative humidity of 5 to 25 6 2% for the selected humidity, so that drying
can be achieved prior to conditioning in the standard atmosphere for testing textiles.
3.1.5standard atmosphere for testing textiles, n—laboratory conditions for testing fibers, yarns, and fabrics in which air
temperature and relative humidity are maintained at specific levels with established tolerances.
3.1.5.1Discussion—Textile materials are used in a number of specific end-use applications that frequently require different
1
This test method is under the jurisdiction of ASTM Committee D13 on Textiles and is the direct responsibility of Subcommittee D13.60 on Fabrics, Specific.
Current edition approved Feb. 10, 2002. Published March 2002.
1
This test method is under the jurisdiction ofASTM Committee D13 onTextiles and is the direct responsibility of Subcommittee D13.60 on FabricTest Methods, Specific.
e2
Current edition approved July 1, 2007. Published August 2007. Originally approved in 2002. Last previous edition approved in 2002 as D 6770–02 .
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.
3
Available from Superintendent of Documents, Government Printing Office, Washington, DC 20402.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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D6770–07
testing temperatures and relative humidities. Specific conditioning and testing of textiles for end-product requirements can be
carried out as defined in Practice D1776.
3.1.6stroke, n—in hex bar abrasion testing, one-half of an abrasion cycle that consists of one forw
...
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