ASTM D4708-07
(Practice)Standard Practice for Preparation of Uniform Free Films of Organic Coatings
Standard Practice for Preparation of Uniform Free Films of Organic Coatings
SIGNIFICANCE AND USE
Free films are required for conducting tests to evaluate physical properties such as tensile and elongation (Test Method D 2370), moisture vapor permeability (Test Methods D 1653), and other physical properties of organic coatings where the substrate may interfere with the determination.
SCOPE
1.1 This practice covers the preparation of free films of organic coatings for use in determining the physical properties of the coatings. Procedures are given for preparing free films on three alternative substrates. These substrates are treated FEP (fluorinated ethylene-propylene) sheet, silicone coated paper, and halosilane coated glass plates.
1.2 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
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
Relations
Buy Standard
Standards Content (Sample)
NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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: D4708 − 07
StandardPractice for
1
Preparation of Uniform Free Films of Organic Coatings
This standard is issued under the fixed designation D4708; 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 practice covers the preparation of free films of 4.1 Free films are required for conducting tests to evaluate
organic coatings for use in determining the physical properties physicalpropertiessuchastensileandelongation(TestMethod
of the coatings. Procedures are given for preparing free films D2370), moisture vapor permeability (Test Methods D1653),
onthreealternativesubstrates.ThesesubstratesaretreatedFEP and other physical properties of organic coatings where the
(fluorinated ethylene-propylene) sheet, silicone coated paper, substrate may interfere with the determination.
and halosilane coated glass plates.
5. Apparatus and Materials
1.2 The values stated in SI units are to be regarded as the
standard. The values given in parentheses are for information 5.1 Equipment, for applying films of uniform thickness as
only. described in Practices D823.
1.3 This standard does not purport to address all of the
5.2 Micrometer Film Thickness Gage , as described in Test
safety concerns, if any, associated with its use. It is the
Method D1005.
responsibility of the user of this standard to establish appro-
5.3 Alternative Release Substrates :
priate safety and health practices and determine the applica-
5.3.1 Sheet of FEP—(polyhexafluoropropylene), preferably
bility of regulatory limitations prior to use.
50-µm (2-mils) thick, coated with a thin film of a dry
3,4
lubricant.
2. Referenced Documents
5.3.2 Sheet of Silicone Coated Paper , preferably 125-µm
2
5,4
2.1 ASTM Standards:
(5-mil) thick.
D823 Practices for Producing Films of Uniform Thickness
5.3.3 Glass Plates, coated with halosilane compound.
of Paint, Varnish, and Related Products on Test Panels
NOTE 1—Other substrates that may be suitable are 250-µm (10-mil)
D1005 Test Method for Measurement of Dry-Film Thick-
thick polyethylene, photographic paper, polished steel, and fluoropolymer
ness of Organic Coatings Using Micrometers
coated metal panels.
D1653 Test Methods for Water Vapor Transmission of Or-
5.4 Precision Specimen Cutter, having a double blade with a
ganic Coating Films
6,4
foot to hold the sample.
D2370 Test Method for Tensile Properties of Organic Coat-
ings
6. Procedure
3. Summary of Test Method
6.1 Prepare the free films by one of the following proce-
dures:
3.1 Free films are prepared by depositing a uniform wet
coating of the test material on a release substrate. The applied
NOTE 2—To prepare specimens for tensile property tests a precision
films are dried or baked, cut into appropriate size for the specimen cutter must be used to ensure nick-free edges on the specimens.
intended physical property test, and then stripped from the
release substrate.
3
The sole source of supply of dry lubricant (MS-122 Fluorocarbon Release
Agent) known to the committee at this time is Miller-Stephenson Chemical Co.,
1
This practice is under the jurisdiction of ASTM Committee D01 on Paint and Inc., 55 Backus Ave., Danbury, CT 06810.
4
Related Coatings, Materials, and Applications and is the direct responsibility of If you are aware of alternative suppliers, please provide this information to
Subcommittee D01.23 on Physical Properties of Applied Paint Films. ASTM International Headquarters. Your comments will receive careful consider-
1
Current edition approved Nov. 1, 2007. Published December 2007. Originally ation at a meeting of the responsible technical committee, which you may attend.
5
approved in 1987. Last previous edition approved in 2004 as D4708 – 04. DOI: The sole source of supply of silicone coated release paper, Form RP-1K, size
5 1
10.1520/D4708-07. 8 ⁄8 by 11 ⁄4 in., known to the committee at this time is the Leneta Co., 15 Whitney
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or Rd., Mahwah, NJ 07430.
6
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM The sole source of supply of the JDC Precision Sample Cutter known to the
Standards volume information, refer to the standard’s Document Summary page on committee at this time is the Thwing-Albert Instrument Co., 14 West Collins Ave.,
the ASTM website. West Berlin, NJ 08091.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ---------------------
...
This document is not anASTM standard and is intended only to provide the user of anASTM 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:D4708–99(Reapproved2004) Designation: D 4708 – 07
Standard Practice for
1
Preparation of Uniform Free Films of Organic Coatings
This standard is issued under the fixed designation D 4708; 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 (e) indicates an editorial change since the last revision or reapproval.
1. Scope*
1.1 This practice covers the preparation of free films of organic coatings for use in determining the physical properties of the
coatings. Procedures are given for preparing free films on fourthree alternative substrates. These substrates are dental foil, treated
FEP (fluorinated ethylene-propylene) sheet, silicone coated paper, and halo-silane coated glass plates.
1.2 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
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. A specific hazard statement is given in 6.1.
2. Referenced Documents
2
2.1 ASTM Standards:
D 823 Practices for Producing Films of Uniform Thickness of Paint, Varnish, and Related Products on Test Panels
D 1005 Test MethodsMethod for Measurement of Dry-Film Thickness of Organic Coatings Using Micrometers
D 1653 Test Methods for Water Vapor Transmission of Organic Coating Films
D 2370 Test Method for Tensile Properties of Organic Coatings
3. Summary of Test Method
3.1 Free films are prepared by depositing a uniform wet coating of the test material on a release substrate. The applied films
are dried or baked, cut into appropriate size for the intended physical property test, and then stripped from the release substrate.
4. Significance and Use
4.1 Free films are required for conducting tests to evaluate physical properties such as tensile and elongation (Test Method
D 2370),moisturevaporpermeability(TestMethodsD 1653),andotherphysicalpropertiesoforganiccoatingswherethesubstrate
may interfere with the determination.
4.2The tin foil/mercury amalgamation procedure should be used only in cases where other substrates may be affected by
high-temperature baking or may affect the test results.
5. Apparatus and Materials
5.1 Equipment, for applying films of uniform thickness as described in Practices D 823.
5.2 Micrometer Film Thickness Gage , as described in Test MethodsMethod D 1005.
5.3 Alternative Release Substrates :
5.3.1 Dental Tin Foil, preferably 25-µm (1-mil) thick.
,
3 4
5.3.2Sheet of FEP—( polyhexafluoropropylene), preferably 50-µm (2-mils) thick, coated with a thin film of a dry lubricant.
1
This practice is under the jurisdiction of ASTM Committee D01 on Paint and Related Coatings, Materials, and Applications and is the direct responsibility of
Subcommittee D01.23 on Physical Properties of Applied Paint Films.
Current edition approved JuneNov. 1, 2004.2007. Published June 2004.December 2007. Originally approved in 1987. Last previous edition approved in 19992004 as
D4708–99.D 4708 – 04.
2
For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
3
Teflon FEP2-mil film thickness (Card No. 03111, Item #29499) from E.I. du Pont de Nemours & Co., Inc., Wilmington, DE 19898, was found suitable for this purpose.
However, it is no longer available. Other substrates that may be suitable are 250-µm (10-mil) thick polyethylene, photographic paper, polished steel, and fluoropolymer coated
metal panels.
3
Thesolesourceofsupplyofdrylubricant(MS-122FluorocarbonReleaseAgent)knowntothecommitteeatthistimeisMiller-StephensonChemicalCo.,Inc.,55Backus
Ave., Danbury, CT 06810.
4
Thesolesourceofsupplyofdrylubricant(MS-122FluorocarbonReleaseAgent)knowntothecommitteeatthistimeisMiller-StephensonChemicalCo.,Inc.,55Backus
Ave., Danbury, CT 06810. If you are aware of alternative suppliers, please provide this information toASTM International Headquarters.Your comments will receive careful
1
consideration at a meeting of the responsible technical committee,
*A Summary of Changes section appears at the end of this standard.
Copyright © ASTM International, 100 Barr Har
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.