ASTM G56-82(2000)e1
(Test Method)Standard Test Method for Abrasiveness of Ink-Impregnated Fabric Printer Ribbons
Standard Test Method for Abrasiveness of Ink-Impregnated Fabric Printer Ribbons
SCOPE
1.1 This test method covers the determination of the abrasiveness of ink-impregnated fabric printer ribbons by means of a sliding wear test.
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.
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e1
Designation:G56–82 (Reapproved 2000)
Standard Test Method for
Abrasiveness of Ink-Impregnated Fabric Printer Ribbons
ThisstandardisissuedunderthefixeddesignationG56;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginal
adoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscript
epsilon (e) indicates an editorial change since the last revision or reapproval.
e NOTE—Editorial corrections were made throughout in May 2000.
contact region usually contains a mixture of unused and used ribbon
1. Scope
surface.
1.1 This test method covers the determination of the abra-
sivenessofink-impregnatedfabricprinterribbonsbymeansof
5. Significance and Use
a sliding wear test.
5.1 This test method differentiates between ribbons on the
1.2 This standard does not purport to address all of the
basisoftheirabilitytocausewearonsurfaceswithwhichthey
safety concerns, if any, associated with its use. It is the
come in contact.
responsibility of the user of this standard to establish appro-
priate safety and health practices and determine the applica-
6. Apparatus
bility of regulatory limitations prior to use.
6.1 Ribbon Support Surface—The overall shape of this
member is that of a cylindrical drum 48 6 1 in. (12206 25
2. Referenced Documents
mm) in diameter, concentric to within 0.0005 in. (0.013 mm)
2.1 ASTM Standards:
total run-out, and 8.25+0.25−0 in. (210+6−0 mm) wide
G 40 Terminology Relating to Wear and Erosion
(seeFig.1).Thesupportsurfaceisthecylindricalsurface.This
surface shall be rigid, made of metal (Note 2), and have a slot
3. Terminology
no greater than 0.020 in. (0.5 mm) in it so that the ends of the
3.1 Definitions of Terms Specific to This Standard:
ribbon may be fed through into the interior. The interior shall
3.1.1 abrasive wear coeffıcient (for a ribbon)— a measure
contain a mechanism to uniformly provide tension to the
of the ability of the ribbon to wear surfaces with which it
ribbon specimen. This member shall be able to rotate about its
comesincontact.Thelargerthevalue,thegreatertheabilityto
axis and provide a linear velocity at the surface of the ribbon
cause wear. The abrasive wear coefficient determined by this
of 321 6 6 in./s (8150 6 150 mm/s).
method is directly proportional to the volume of material
NOTE 2—2024 aluminum with a minimum thickness of 0.25 in. (6.35
removed from the steel sphere in the test.
mm) is adequate.The roughness of this surface should not exceed 20 µin.
3.2 For additional terms pertinent to this test method, see
(0.5 µm), CLA.
Terminology G 40.
6.2 Wear Specimen Support—This member shall be able to
4. Summary of Test Method
press a rigidly mounted 0.25-in. (6.35-mm) diameter spherical
4.1 A ribbon specimen is wrapped around the cylindrical wear specimen against the ribbon surface and advance the
surface of a drum. A hardened steel sphere is pressed against specimen across the surface of the ribbon specimen in an axial
the ribbon surface. While the drum rotates about its axis, the direction at a rate of 0.001 6 0.0001 in. (0.254 6 0.025 mm)
steel sphere is slowly moved in an axial direction across the perdrumrevolution(seeFig.2).Themountingshallbeofsuch
surface of the ribbon (Note 1). After a specified amount of a construction that continual contact with the ribbon surface is
sliding has occurred, the test is stopped and the volume of maintained with a normal load of 0.22 lb (this corresponds to
material removed from the steel sphere is determined. This the dead-weight load produced by a 100-g mass) between the
volumeisthenusedtocomputeanabrasivewearcoefficientfor wear specimen and ribbon surface and sufficiently rigid so that
the ribbon specimen. no rotation occurs.
NOTE 1—These two motions ensure that the unused ribbon is continu-
ally supplied to the contact area of the wear specimen; however, the
Adiscussionofthewearprocessandtheinfluenceofvariousparametersonthe
wearcanbefoundinBayer,R.G.,“WearbyPaperandRibbon” Wear,Vol49,1978,
pp. 147–168 and Bayer, R. G.,“ Mechanism of Wear by Ribbon and Paper,” IBM
This test method is under the jurisdiction ofASTM Committee G-2 on Erosion Journal of Research and Development,Vol22,No.6,November1978,pp.668–674
and Wear, and is the direct responsibility of Subcommittee G02.30 on Wear. An implementation of the apparatus required is discussed in“ Testing Machine
Current edition approved Oct. 11, 1982. Published December 1982. Originally for the Evaluation of Wear by Paper,” available from ASTM Headquarters as RR:
published as G56–77. Last previous edition G56–77. G02-1000.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
G56
mounted ribbon specimen shall be allowed to equilibrate for a
minimum of1hatthe relative humidity and temperature at
which the test will be conducted.
9. Procedure
9.1 Put one end of the ribbon through the slot in the drum
and fasten to the tension device. Then wrap the ribbon around
the surface of the drum so that the outer surface of the ribbon
is exposed. Feed the other end of the ribbon through the slot
andfastentothetensiondevice.Applysufficienttensionsothat
the ribbon uniformly conforms to the surface of the drum and
is held taut. Align the ribbon specimen so that the wear
specimen does not contact or slide off the edges during the
course of the test.
9.2 After the wear specimen is mounted to the wear speci-
mensupport,pressthewearspecimenagainstthesurfaceofthe
ribbon with a load of 100 g. Contact should be made near but
Metric Equivalents
notwiththeedgeoftheribbon.Aftertheloadhasbeenapplied,
in. 0.020 0.25 1 8.25 48
simultaneously start the axial motion of the specimen and the
mm 0.51 6.35 25.4 210 1220
rotation of the drum.
FIG. 1 Ribbon Support Surface
9.3 For ribbon specimens of sufficient width, continue the
5 6
slidingforaminimumof30min,or5.8 310 in.(14.7 310
mm) of sliding, without coming in contact with the edge of the
ribbon specimen. Then remove the wear specimen from the
surface while the drum is still rotating. Record the sliding
duration.
9.4 For narrower specimens for which this cannot be done,
remove the wear specimen from the ribbon surface prior to
contacting the ribbon edge, while the drum is still rotating.
Record the duration of sliding. Then stop the drum and pre
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