ASTM D6770-07(2015)

Standard Test Method for Abrasion Resistance of Textile Webbing (Hex Bar Method)

SIGNIFICANCE AND USE
5.1 The measurement of the resistance to abrasion of textile webbing is very complex. The resistance to abrasion is affected by many factors that include the inherent mechanical properties of the fibers; the dimensions of the fibers; the structure of the yarns; the construction of the webbing; the type, kind, and amount of treatment added to the fibers, yarns, or webbing; the nature of the abradant; the variable action of the abradant over the specimen area abraded; the tension on the specimen; the pressure between the specimen and the abradant; and the dimensional changes in the specimen.  
5.2 The resistance of textile webbing to abrasion as measured by this test method does not include all the factors which account for wear performance or durability in actual use. While the abrasion resistance stated in terms of the number of cycles and durability (defined as the ability to withstand deterioration or wearing out in use, including the effects of abrasion) are frequently related, the relationship varies with different end uses. Different factors may be necessary in any calculation of predicted durability from specific abrasion data.  
5.3 Laboratory tests may be reliable as an indication of relative end use in cases where the difference in abrasion resistance of various materials is large, but they should not be 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 end uses unless there are data showing the specific relationship between laboratory abrasion tests and actual wear in the intended end use.  
5.4 While there has not been extensive interlaboratory testing prior to development of this standard, there has been some quality control testing by manufacturers. An intralaboratory test was conducted to initiate this test method, using a single product. This data will be used to determine a preliminary statement on precision and b...
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.  
1.2 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.

General Information

• Status: Historical
• Publication Date: 30-Jun-2015
• ICS: 59.080.30 - Textile fabrics
• Technical Committee: D13 - Textiles
• Drafting Committee: D13.60 - Fabric Physical Test Methods B

Relations

• Replaces: ASTM D6770-07(2011) - Standard Test Method for Abrasion Resistance of Textile Webbing (Hex Bar Method)
• Effective Date: 01-Jul-2015
• Referred By: ASTM D4850-23 - Standard Terminology Relating to Fabrics and Fabric Test Methods
• Effective Date: 01-Jul-2015

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: D6770 − 07 (Reapproved 2015)
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.Anumber 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 Abrasionresistanceismeasuredbysubjectingthespeci-
resistance of textile webbing using a hex bar abrasion tester. men to unidirectional reciprocal rubbing over a specific bar
1.1.1 Theresistanceisexpressedasapercentageofretained under specified conditions of tension, stroke length and time.
break strength. Resistance to abrasion is evaluated by determining the percent
retention of breaking force of an abraded specimen compared
1.2 This standard does not purport to address all of the
to an unabraded specimen.
safety concerns, if any, associated with its use. It is the
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 The measurement of the resistance to abrasion of textile
bility of regulatory limitations prior to use.
webbingisverycomplex.Theresistancetoabrasionisaffected
bymanyfactorsthatincludetheinherentmechanicalproperties
2. Referenced Documents
of the fibers; the dimensions of the fibers; the structure of the
2
2.1 ASTM Standards:
yarns; the construction of the webbing; the type, kind, and
D123Terminology Relating to Textiles
amountoftreatmentaddedtothefibers,yarns,orwebbing;the
D1776Practice for Conditioning and Testing Textiles
nature of the abradant; the variable action of the abradant over
D4850Terminology Relating to Fabrics and Fabric Test
the specimen area abraded; the tension on the specimen; the
Methods
pressure between the specimen and the abradant; and the
2.2 Other Standard:
dimensional changes in the specimen.
Federal Standard 191, Method 4108 “Strength and
5.2 The resistance of textile webbing to abrasion as mea-
Elongation, Breaking;TextileWebbing,Tape and Braided
3
suredbythistestmethoddoesnotincludeallthefactorswhich
Items”
accountforwearperformanceordurabilityinactualuse.While
the abrasion resistance stated in terms of the number of cycles
3. Terminology
and durability (defined as the ability to withstand deterioration
3.1 For all terminology relating to Fabrics, refer to Termi-
or wearing out in use, including the effects of abrasion) are
nology D4850.
frequently related, the relationship varies with different end
3.2 The following terms are relevant to this standard:
uses. Different factors may be necessary in any calculation of
abrasion, abrasion cycle, breaking force, standard atmosphere
predicted durability from specific abrasion data.
for preconditioning textiles, standard atmosphere for testing
5.3 Laboratory tests may be reliable as an indication of
textiles, stroke, in hex bar abrasion testing, webbing.
relative end use in cases where the difference in abrasion
3.3 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
ThistestmethodisunderthejurisdictionofASTMCommitteeD13onTextiles
endusesunlesstherearedatashowingthespecificrelationship
and is the direct responsibility of Subcommittee D13.60 on Fabric Test Methods,
between laboratory abrasion tests and actual wear in the
Specific.
intended end use.
Current edition approved July 1, 2015. Published September 2015. Originally
approvedin2002.Lastpreviouseditionapprovedin2011asD6770–07(2011).DOI:
5.4 While there has not been extensive interlaboratory
10.1520/D6770-07R15.
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 [e-mail]. 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,
Washington, DC 20402. nary statement on precision and bias. Subsequent to approval
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

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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.
Designation: D6770 − 07 (Reapproved 2011) D6770 − 07 (Reapproved 2015)
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
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.
1.2 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:
D123 Terminology Relating to Textiles
D1776 Practice for Conditioning and Testing Textiles
D4850 Terminology Relating to Fabrics and Fabric Test Methods
2.2 Other Standard:
3
Federal Standard 191, Method 4108 “Strength and Elongation, Breaking; Textile Webbing, Tape and Braided Items”
3. Terminology
3.1 For all terminology relating to Fabrics, refer to Terminology D4850.
3.2 The following terms are relevant to this standard: abrasion, abrasion cycle, breaking force, standard atmosphere for
preconditioning textiles, standard atmosphere for testing textiles, stroke, in hex bar abrasion testing, webbing.
3.3 For all other terminology related to textiles, refer to Terminology D123.
4. Summary of Test Method
4.1 Abrasion resistance is measured by subjecting the specimen to unidirectional reciprocal rubbing over a specific bar under
specified conditions of tension, stroke length and time. Resistance to abrasion is evaluated by determining the percent retention
of breaking force of an abraded specimen compared to an unabraded specimen.
5. Significance and Use
5.1 The measurement of the resistance to abrasion of textile webbing is very complex. The resistance to abrasion is affected by
many factors that include the inherent mechanical properties of the fibers; the dimensions of the fibers; the structure of the yarns;
the construction of the webbing; the type, kind, and amount of treatment added to the fibers, yarns, or webbing; the nature of the
abradant; the variable action of the abradant over the specimen area abraded; the tension on the specimen; the pressure between
the specimen and the abradant; and the dimensional changes in the specimen.
5.2 The resistance of textile webbing to abrasion as measured by this test method does not include all the factors which account
for wear performance or durability in actual use. While the abrasion resistance stated in terms of the number of cycles and
durability (defined as the ability to withstand deterioration or wearing out in use, including the effects of abrasion) are frequently
related, the relationship varies with different end uses. Different factors may be necessary in any calculation of predicted durability
from specific abrasion data.
1
This test method is under the jurisdiction of ASTM Committee D13 on Textiles and is the direct responsibility of Subcommittee D13.60 on Fabric Test Methods, Specific.
Current edition approved May 1, 2011July 1, 2015. Published July 2011September 2015. Originally approved in 2002. Last previous edition approved in 20072011 as
D6770D6770–07(2011).–07. DOI: 10.1520/D6770-07R11.10.1520/D6770-07R15.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Standards
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
1

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D6770 − 07 (2015)
5.3 Laboratory tests may be reliable as an indication of relative end use in cases where the difference in abrasion resistance of
various materials is large, but they should not be 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
...