ASTM D7255-06e1
(Test Method)Standard Test Method for Abrasion Resistance of Leather (Rotary Platform, Double-Head Method)
Standard Test Method for Abrasion Resistance of Leather (Rotary Platform, Double-Head Method)
SIGNIFICANCE AND USE
The resistance of leather to abrasion, as measured on a testing machine in the laboratory, is generally only one of several factors contributing to wear performance or durability as experienced in the actual use of the material. While “abrasion resistance” (often stated in terms of the number of abrasion cycles) and “durability” (defined as the ability to withstand deterioration or wear out in use, including the effects of abrasion) are frequently related, the relationship varies with different end uses and different factors may be necessary in any calculation of predicted durability from specific abrasion data. This test method provides a comparative ranking of material performance, which can be used as an indication of relative end-use performance.
The resistance of leather to abrasion may be affected by factors including test conditions, type of abradant, pressure between the specimen and abradant, mounting or tension of the specimen, and type, kind, or amount of finishing materials.
Abrasion tests utilizing the rotary platform, double-head tester may be subject to variation due to changes in the abradant during specific tests. Depending on abradant type and test specimen, the wheel surface may change (that is, become clogged) due to the pick up of finishing or other materials from test specimens and must be cleaned at regularly defined intervals.
The measurement of the relative amount of abrasion may also be affected by the method of evaluation and may be influenced by the judgment of the operator.
SCOPE
1.1 This test method covers the determination of the abrasion resistance of leather using the rotary platform, double-head tester (RPDH).
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 to determine the applicability of regulatory limitations prior to use.
General Information
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Standards Content (Sample)
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Designation: D7255 − 06
StandardTest Method for
Abrasion Resistance of Leather (Rotary Platform, Double-
1
Head Method)
This standard is issued under the fixed designation D7255; 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.
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´ NOTE—In Note 2, the reference to H-19 was editorially corrected to H-18 in September 2006.
1. Scope 3.1.4 resurface—the preparation of an abrasive wheel on a
resurfacing disk or diamond tool wheel refacer, prior to use in
1.1 This test method covers the determination of the abra-
testing.
sion resistance of leather using the rotary platform, double-
head tester (RPDH). 3.2 For definitions of other leather terms used in this test
method, refer to Terminology D1517.
1.2 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
4. Summary of Test Method
responsibility of the user of this standard to establish appro-
4.1 Aspecimenisabradedusingrotaryrubbingactionunder
priate safety and health practices and to determine the
controlled conditions of pressure and abrasive action. The test
applicability of regulatory limitations prior to use.
specimen, mounted on a turntable platform, turns on a vertical
axis, against the sliding rotation of two abrading wheels. One
2. Referenced Documents
abrading wheel rubs the specimen outward toward the periph-
2
2.1 ASTM Standards:
ery and the other, inward toward the center. The resulting
D1517 Terminology Relating to Leather
abrasion marks form a pattern of crossed arcs over an area of
D1610 Practice for Conditioning Leather and Leather Prod-
2
approximately 30 cm . Resistance to abrasion is evaluated by
ucts for Testing
visual inspection of the specimen or change in weight, as
D2240 Test Method for Rubber Property—Durometer Hard-
described in Section 14.
ness
D2813 Practice for Sampling Leather for Physical and
5. Significance and Use
Chemical Tests
5.1 The resistance of leather to abrasion, as measured on a
testing machine in the laboratory, is generally only one of
3. Terminology
several factors contributing to wear performance or durability
3.1 Definitions:
as experienced in the actual use of the material. While
3.1.1 abraser—a wear testing instrument, also referred to as
“abrasion resistance” (often stated in terms of the number of
a rotary platform, double head (RPDH) tester or abrader.
abrasion cycles) and “durability” (defined as the ability to
3.1.2 abrasion—the wearing away of any part of a material
withstand deterioration or wear out in use, including the effects
by rubbing against another surface.
of abrasion) are frequently related, the relationship varies with
differentendusesanddifferentfactorsmaybenecessaryinany
3.1.3 abrasion cycle—in abrasion testing, one or more
calculation of predicted durability from specific abrasion data.
movements of the abradant across a material surface, or the
This test method provides a comparative ranking of material
material surface across the abradant, that permits a return to its
performance, which can be used as an indication of relative
starting position. In the case of the rotary platform test method,
end-use performance.
it consists of one complete rotation of the specimen.
5.2 The resistance of leather to abrasion may be affected by
factors including test conditions, type of abradant, pressure
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This test method is under the jurisdiction ofASTM Committee D31 onLeather
betweenthespecimenandabradant,mountingortensionofthe
and is the direct responsibility of Subcommittee D31.05 on Upholstery.
specimen, and type, kind, or amount of finishing materials.
Current edition approved April 1, 2006. Published April 2006. DOI: 10.1520/
D7255-06E01.
5.3 Abrasion tests utilizing the rotary platform, double-head
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For referenced ASTM standards, visit the ASTM website, www.astm.org, or
tester may be subject to variation due to changes in the
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
abradant during specific tests. Depending on abradant type and
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. test specimen, the wheel surface may change (that is, become
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D7255 − 06
clogged) due to the pick up of finishing or other materials from opening positioned between the two wheels and over the wear
test specimens and must be cleaned at regularly defined path and the other placed diametrically opposite. The distan
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