ASTM F2357-10
(Test Method)Standard Test Method for Determining the Abrasion Resistance of Inks and Coatings on Membrane Switches Using the Norman Tool "RCA" Abrader (Withdrawn 2017)
Standard Test Method for Determining the Abrasion Resistance of Inks and Coatings on Membrane Switches Using the Norman Tool "RCA" Abrader (Withdrawn 2017)
SIGNIFICANCE AND USE
Membrane Switch keys are subjected to repeated actuations, usually by a human finger. They are also subjected to other conditions (for example, wiping, cleaning, rubbing) during handling, end-use, shipment, or storage that may cause abrasion damage. The result may be a significant removal of the coatings, text or decorative inks.
This test method is applicable to a wide range of materials. The main criterion is that the abrasion process produces visible wear or breakthrough in the surface being tested.
The amount of abrasion damage to a surface is dependent on numerous variables. This test method provides a way of comparing relative abrasion resistance of inks and coatings. In no way do the results provide a correlation value of the number of human finger touches before coating failure. It only provides a means to compare results of tests performed using the same equipment, abrasive materials and loading conditions.
The test method can be used for quality control purposes, as a research and development tool, to evaluate material combinations for a given application, or for the comparison of materials with relatively similar properties.
SCOPE
1.1 This test method describes the procedure for subjecting inks or coatings on membrane switches to an abrasive medium at a specified force.
1.2 Within certain limitations, as described in this document, this test method is applicable for materials including, but not limited to: printed or coated polyester, polycarbonate, and silicone rubber. The samples can be either flat or contoured.
1.3 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.
WITHDRAWN RATIONALE
This test method describes the procedure for subjecting inks or coatings on membrane switches to an abrasive medium at a specified force.
Formerly under the jurisdiction of Committee F01 on Electronics, this test method was withdrawn in November 2017 and replaced by Test Method F3152 for Determining Abrasion Resistance of Inks and Coatings on Substrates Using Dry or Wet Abrasive Medium.2
General Information
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Standards Content (Sample)
NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
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Designation: F2357 − 10
Standard Test Method for
Determining the Abrasion Resistance of Inks and Coatings
on Membrane Switches Using the Norman Tool “RCA”
1,2
Abrader
This standard is issued under the fixed designation F2357; 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 3.1.3 wear limit—in testing membrane switches, the number
of cycles until an underlying layer of different color may be
1.1 This test method describes the procedure for subjecting
seen through the first layer (not applicable for transparent
inks or coatings on membrane switches to an abrasive medium
coatings).
at a specified force.
4. Significance and Use
1.2 Within certain limitations, as described in this
document, this test method is applicable for materials
4.1 Membrane Switch keys are subjected to repeated
including, but not limited to: printed or coated polyester,
actuations, usually by a human finger. They are also subjected
polycarbonate, and silicone rubber. The samples can be either
to other conditions (for example, wiping, cleaning, rubbing)
flat or contoured.
during handling, end-use, shipment, or storage that may cause
1.3 This standard does not purport to address all of the abrasion damage. The result may be a significant removal of
the coatings, text or decorative inks.
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro-
4.2 This test method is applicable to a wide range of
priate safety and health practices and determine the applica-
materials. The main criterion is that the abrasion process
bility of regulatory limitations prior to use.
produces visible wear or breakthrough in the surface being
tested.
2. Referenced Documents
4.3 The amount of abrasion damage to a surface is depen-
3
2.1 ASTM Standards:
dent on numerous variables. This test method provides a way
F2112 Terminology for Membrane Switches
of comparing relative abrasion resistance of inks and coatings.
In no way do the results provide a correlation value of the
3. Terminology
number of human finger touches before coating failure. It only
3.1 Definitions:
provides a means to compare results of tests performed using
3.1.1 final breakthrough—the number of cycles until com-
thesameequipment,abrasivematerialsandloadingconditions.
plete removal of the first surface ink or coating being tested.
4.4 The test method can be used for quality control
3.1.2 membrane switch—a momentary switching device in
purposes, as a research and development tool, to evaluate
which at least one contact is on, or made of, a flexible
material combinations for a given application, or for the
substrate.
comparison of materials with relatively similar properties.
5. Interferences
1
This test method is under the jurisdiction of ASTM Committee F01 on
5.1 Inconsistent wear can occur which will compromise the
Electronics and is the direct responsibility of Subcommittee F01.18 on Membrane
results. Caution is necessary to ensure the mounting method
Switches.
does not deflect the specimen, which may influence the wear
Current edition approved May 1, 2010. Published June 2010. Originally
approved in 2004. Last previous edition approved in 2004 as F2357 - 04. DOI:
characteristics.
10.1520/F2357-10.
2
5.2 Contoured surfaces can be tested but results may be
The Norman Tool “RCA”Abrader is covered by a patent. Interested parties are
invited to submit information regarding the identification of an alternative(s) to this
more difficult to duplicate and some equipment is not designed
patented item to theASTM International Headquarters.Your comments will receive
to test non-flat surfaces.
careful consideration at a meeting of the responsible technical committee, which
you may attend.
5.3 Whenever possible, a smooth surface is preferred. Extra
3
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
care should be taken when evaluating a non-uniform surface
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
(that is, rough surface), and for the user to recognize potential
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. variations between specimens.
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F2357 − 10
6. Apparatus 9.2 Adjust force to be applied to 175 g (or otherwise
specified).
6.1 Machine capable of providing cyclic or continuous
abrasion to a test specimen under controlled loading condi-
9.3 Gently lower the abrada
...
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