ASTM F1842-09
(Test Method)Standard Test Method for Determining Ink or Coating Adhesion on Plastic Substrates for Membrane Switch Applications
Standard Test Method for Determining Ink or Coating Adhesion on Plastic Substrates for Membrane Switch Applications
SIGNIFICANCE AND USE
If the ink or coating is to fulfill its function, it must adhere to the substrate. Substrates and their surface preparation have a significant effect on the adhesion of inks or coatings. Therefore, a method of evaluating adhesion of inks or coatings to different substrates or surface treatments, or of different inks or coatings to the same substrate and surface treatment, is useful to the industry.
The limitations of all adhesion methods and the specific limitation of this test method to lower levels of adhesion should be recognized before using it. The intra– and inter–laboratory precision of this test method is under evaluation.
Printing area to be tested should be a solid area large enough to include the entire cross hatch pattern.
SCOPE
1.1 This test method is based on existing Test Method D 3359, with modifications to make it suitable for plastic substrates and membrane switches.
1.2 Despite the problems associated with a tape test on plastic substrates, it is our belief that this is still one of the best ways to test ink and coating for adhesion for membrane switch applications. In writing this test method we are addressing several of the objections to the test method that could affect its precision and repeatability on plastic substrates.
1.3 These test methods cover whether the adhesion of coating or ink to a substrate is at an acceptable level. They do not distinguish between higher levels of adhesion, for which more sophisticated methods of measurement may be required.
Note 1—It should be recognized that differences in adherability of the ink or coating surface can affect the results obtained with inks or coatings having the same inherent adhesion.
1.4 In multi–coat systems adhesion failure may occur between coats, so that the adhesion of the coating system to the substrate is not determined.
1.5 This test method is specifically designed for measuring adhesion of inks and coatings (films) that have a thickness of 5 mil (125 microns) or less, on plastics such as polyester and polycarbonate.
1.6 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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Designation: F1842 − 09
StandardTest Method for
Determining Ink or Coating Adhesion on Plastic Substrates
1
for Membrane Switch Applications
This standard is issued under the fixed designation F1842; 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. Terminology
3.1 membrane switch—a momentary switching device in
1.1 This test method is based on existing Test Method
which at least one contact is on, or made of, a flexible
D3359, with modifications to make it suitable for plastic
substrate.
substrates and membrane switches.
1.2 Despite the problems associated with a tape test on
4. Summary of Test Method
plastic substrates, it is our belief that this is still one of the best
4.1 A lattice pattern with six cuts in each direction is made
ways to test ink and coating for adhesion for membrane switch
in the ink or coating to the substrate. Pressure sensitive tape is
applications. In writing this test method we are addressing
applied over the lattice and then removed, and adhesion is
several of the objections to the test method that could affect its
evaluated by comparison with the descriptions and illustra-
precision and repeatability on plastic substrates.
tions.
1.3 These test methods cover whether the adhesion of
coating or ink to a substrate is at an acceptable level. They do 5. Significance and Use
not distinguish between higher levels of adhesion, for which
5.1 If the ink or coating is to fulfill its function, it must
more sophisticated methods of measurement may be required.
adhere to the substrate. Substrates and their surface preparation
have a significant effect on the adhesion of inks or coatings.
NOTE 1—It should be recognized that differences in adherability of the
ink or coating surface can affect the results obtained with inks or coatings
Therefore, a method of evaluating adhesion of inks or coatings
having the same inherent adhesion.
to different substrates or surface treatments, or of different inks
1.4 In multi–coat systems adhesion failure may occur be-
or coatings to the same substrate and surface treatment, is
tween coats, so that the adhesion of the coating system to the
useful to the industry.
substrate is not determined.
5.2 The limitations of all adhesion methods and the specific
1.5 This test method is specifically designed for measuring
limitationofthistestmethodtolowerlevelsofadhesionshould
adhesion of inks and coatings (films) that have a thickness of
be recognized before using it. The intra– and inter–laboratory
5 mil (125 microns) or less, on plastics such as polyester and
precision of this test method is under evaluation.
polycarbonate.
5.3 Printing area to be tested should be a solid area large
1.6 This standard does not purport to address all of the
enough to include the entire cross hatch pattern.
safety concerns, if any, associated with its use. It is the
6. Interferences
responsibility of the user of this standard to establish appro-
The type of tape used should be compatible with the type of
priate safety and health practices and determine the applica-
inks used.
bility of regulatory limitations prior to use.
2. Referenced Documents
7. Apparatus
2
2.1 ASTM Standards:
7.1 Cutting Tool—A multi–blade cutter having a cutting
D3359 Test Methods for Measuring Adhesion by Tape Test
edge angle between 15 and 30 degrees that will make six cuts
at once that are 2 mm apart. It is of particular importance that
1
This practice is under the jurisdiction ofASTM Committee F01 on Electronics
the cutting edges be in good condition.
and is the direct responsibility of Subcommittee F01.18 on Membrane Switches.
Current edition approved June 15, 2009. Published July 2009. Originally NOTE 2—Dull cutting edges require more pressure on the tool, which
approved in 1997. Last previous edition approved in 2002 as F1842-02. DOI: increases the difficulty in controlling the depth of the cuts. Dull edges can
10.1520/F1842-09.
also rupture or chip the substrate, ink, or coating and thus yield
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
inconsistent or inaccurate results.
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
7.2 Tape—Oneinch(25mm)wideclearorsemi–transparent
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. pressure sensitive tape with an adhesion strength agreed upon
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
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F1842 − 09
by the supplier and the user is nee
...
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:F1842–02 Designation: F 1842 – 09
Standard Test Method for
Determining Ink or Coating Adhesion on Plastic Substrates
1
for Membrane Switch Applications
This standard is issued under the fixed designation F 1842; 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 is based on existing Test Method D 3359, with modifications to make it suitable for plastic substrates and
membrane switches.
1.2 Despite the problems associated with a tape test on plastic substrates, it is our belief that this is still one of the best ways
to test ink and coating for adhesion for membrane switch applications. In writing this test method we are addressing several of the
objections to the test method that could affect its precision and repeatability on plastic substrates.
1.3 These test methods cover whether the adhesion of coating or ink to a substrate is at an acceptable level. They do not
distinguish between higher levels of adhesion, for which more sophisticated methods of measurement may be required.
NOTE 1—Itshouldberecognizedthatdifferencesinadherabilityoftheinkorcoatingsurfacecanaffecttheresultsobtainedwithinksorcoatingshaving
the same inherent adhesion.
1.4 In multi–coat systems adhesion failure may occur between coats, so that the adhesion of the coating system to the substrate
is not determined.
1.5 This test method is specifically designed for measuring adhesion of inks and coatings (films) that have a thickness of 5 mil
(125 microns) or less, on plastics such as polyester and polycarbonate.
1.6 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:
D 3359 Test Methods for Measuring Adhesion by Tape Test
3. Terminology
3.1 membrane switchmembrane switch—a momentary switching device in which at least one contact is on, or made of, a
flexible substrate.
4. Summary of Test Method
4.1 A lattice pattern with six cuts in each direction is made in the ink or coating to the substrate. Pressure sensitive tape is
applied over the lattice and then removed, and adhesion is evaluated by comparison with the descriptions and illustrations.
5. Significance and Use
5.1 If the ink or coating is to fulfill its function, it must adhere to the substrate. Substrates and their surface preparation have
a significant effect on the adhesion of inks or coatings. Therefore, a method of evaluating adhesion of inks or coatings to different
substratesorsurfacetreatments,orofdifferentinksorcoatingstothesamesubstrateandsurfacetreatment,isusefultotheindustry.
5.2 The limitations of all adhesion methods and the specific limitation of this test method to lower levels of adhesion should
be recognized before using it. The intra– and inter–laboratory precision of this test method is under evaluation.
5.3 Printing area to be tested should be a solid area large enough to include the entire cross hatch pattern.
1
This practice is under the jurisdiction of ASTM Committee F01 on Electronics and is the direct responsibility of Subcommittee F01.18 on Membrane Switches.
Current edition approved Dec. 10, 2002. Published February 2002. Originally approved in 1997. Last previous edition approved in 1997 as F1842–97.
Current edition approved June 15, 2009. Published July 2009. Originally approved in 1997. Last previous edition approved in 2002 as F 1842-02.
2
For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
, Vol 06.01.volume information, refer to the standard’s Document Summary page on the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1
---------------------- Page: 1 ----------------------
F1842–09
6. Interferences
The type of tape used should be compatible with the type of inks used.
7. Apparatus
7.1 Cutting Tool—Amulti–blade cutter having a cutting edge angle between 15 and 30 degrees that will make six cuts at once
that are 2 mm apart. It is of particular importance that the cutting edges be in g
...
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