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ASTM F2357-04

(Test Method)

Standard Test Method for Determining the Abrasion Resistance of Inks and Coatings on Membrane Switches Using the Norman Tool "RCA" Abrader

Standard Test Method for Determining the Abrasion Resistance of Inks and Coatings on Membrane Switches Using the Norman Tool "RCA" Abrader

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.

General Information

Status
Historical
Publication Date
29-Feb-2004
ICS
31.220.20 - Switches
87.080 - Inks. Printing inks
Technical Committee
F01 - Electronics
Drafting Committee
F01.18 - Printed Electronics
Current Stage
Ref Project

Relations

Replaced By
ASTM F2357-10 - Standard Test Method for Determining the Abrasion Resistance of Inks and Coatings on Membrane Switches Using the Norman Tool "RCA" Abrader (Withdrawn 2017)
Effective Date
01-May-2010

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ASTM F2357-04 - Standard Test Method for Determining the Abrasion Resistance of Inks and Coatings on Membrane Switches Using the Norman Tool "RCA" AbraderASTM F2357-04 - Standard Test Method for Determining the Abrasion Resistance of Inks and Coatings on Membrane Switches Using the Norman Tool "RCA" Abrader
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ASTM F2357-04 - Standard Test Method for Determining the Abrasion Resistance of Inks and Coatings on Membrane Switches Using the Norman Tool "RCA" Abrader
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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:F2357–04
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 4. Significance and Use
1.1 This test method describes the procedure for subjecting 4.1 Membrane Switch keys are subjected to repeated actua-
inks or coatings on membrane switches to an abrasive medium tions, usually by a human finger. They are also subjected to
at a specified force. other conditions (for example, wiping, cleaning, rubbing)
1.2 Within certain limitations, as described in this docu- during handling, end-use, shipment, or storage that may cause
ment, this test method is applicable for materials including, but abrasion damage. The result may be a significant removal of
not limited to: printed or coated polyester, polycarbonate, and the coatings, text or decorative inks.
silicone rubber. The samples can be either flat or contoured. 4.2 This test method is applicable to a wide range of
1.3 This standard does not purport to address all of the materials. The main criterion is that the abrasion process
safety concerns, if any, associated with its use. It is the produces visible wear or breakthrough in the surface being
responsibility of the user of this standard to establish appro- tested.
priate safety and health practices and determine the applica- 4.3 The amount of abrasion damage to a surface is depen-
bility of regulatory limitations prior to use. dent on numerous variables. This test method provides a way
of comparing relative abrasion resistance of inks and coatings.
2. Referenced Documents
In no way do the results provide a correlation value of the
2.1 ASTM Standards: number of human finger touches before coating failure. It only
F2112 Terminology for Membrane Switches
provides a means to compare results of tests performed using
thesameequipment,abrasivematerialsandloadingconditions.
3. Terminology
4.4 The test method can be used for quality control pur-
3.1 Definitions:
poses, as a research and development tool, to evaluate material
3.1.1 final breakthrough—the number of cycles until com-
combinations for a given application, or for the comparison of
plete removal of the first surface ink or coating being tested.
materials with relatively similar properties.
3.1.2 membrane switch—a momentary switching device in
5. Interferences
which at least one contact is on, or made of, a flexible
substrate.
5.1 Inconsistent wear can occur which will compromise the
3.1.3 wear limit—in testing membrane switches,thenumber results. Caution is necessary to ensure the mounting method
of cycles until an underlying layer of different color may be
does not deflect the specimen, which may influence the wear
seen through the first layer (not applicable for transparent characteristics.
coatings).
5.2 Contoured surfaces can be tested but results may be
more difficult to duplicate and some equipment is not designed
to test non-flat surfaces.
This test method is under the jurisdiction of ASTM Committee F01 on
Electronics and is the direct responsibility of Subcommittee F01.18 on Membrane
5.3 Whenever possible, a smooth surface is preferred. Extra
Switches.
care should be taken when evaluating a non-uniform surface
Current edition approved March 1, 2004. Published April 2004. DOI: 10.1520/
(that is, rough surface), and for the user to recognize potential
F2357-04.
The Norman Tool “RCA”Abrader is covered by a patent. Interested parties are variations between specimens.
invited to submit information regarding the identification of an alternative(s) to this
patented item to theASTM International Headquarters.Your comments will receive
6. Apparatus
careful consideration at a meeting of the responsible technical committee, which
6.1 Machine capable of providing cyclic or continuous
you may attend.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or abrasion to a test specimen under controlled loading condi-
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
tions.
Standards volume information, refer to the standard’s Document Summary page on
6.2 Suggested Sources:
the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
F2357–04
6.2.1 Norman Tool RCA Ab
...

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FIG. 1 Bored Forgings
Note 1: Sensitivity multiplication factor such that a 10 % indication at the forging bore surface will be equivalent to a 1/8 in. [3 mm] diameter flat bottom hole. Inspection frequency: 2.0 MHz or 2.25 MHz. Material velocity: 2.30 in./s × 105 in./s [5.85 cm/s × 105 cm/s].
FIG. 2 Solid Forgings
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FIG. 3 Conversion Factors to Be Used in Conjunction with Fig. 1 and Fig. 2 if a Change in the Reference Reflector Diameter is Required
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