ASTM D4147-18
(Practice)Standard Practice for Applying Coil Coatings Using Wire-Wound Drawdown Bars
Standard Practice for Applying Coil Coatings Using Wire-Wound Drawdown Bars
SIGNIFICANCE AND USE
3.1 This practice is useful in the laboratory to simulate roll-coated films.
SCOPE
1.1 This practice covers a procedure for applying a coil coating film of uniform thickness on a flat metal panel using wire-wound drawdown bars.
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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
1.3 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
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This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation: D4147 − 18
Standard Practice for
1
Applying Coil Coatings Using Wire-Wound Drawdown Bars
This standard is issued under the fixed designation D4147; 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 and the volume solids of the coating under test. Each bar is
providedanumericidentifiertohelpinselectingthecorrectbar
1.1 This practice covers a procedure for applying a coil
to provide a specific dry film thickness.
coating film of uniform thickness on a flat metal panel using
wire-wound drawdown bars.
4.2 Devices for Securing Panels:
4.2.1 Magnetic Chuck for securing steel panels to eliminate
1.2 This standard does not purport to address all of the
bowing.
safety concerns, if any, associated with its use. It is the
4.2.2 Vacuum Plate for securing very lightweight nonmag-
responsibility of the user of this standard to establish appro-
netic panels.
priate safety, health, and environmental practices and deter-
4.2.3 Tape for securing the top of thin-gage panels.
mine the applicability of regulatory limitations prior to use.
4.2.4 Mechanical Drives for securing panels and automat-
1.3 This international standard was developed in accor-
ing the drawdown procedure.
dance with internationally recognized principles on standard-
ization established in the Decision on Principles for the
5. Hazards
Development of International Standards, Guides and Recom-
mendations issued by the World Trade Organization Technical
5.1 The flash points of most solvents used in coatings and
Barriers to Trade (TBT) Committee.
related products are low enough that adequate ventilation is
needed to avoid exceeding 25 % of the lower explosive limits
2. Summary of Practice
of the solvent when preparing and baking the panels. These
2.1 A flat panel is secured on a firm horizontal surface. An
solvents could be toxic, care should be taken to avoid inhala-
ample amount of coating is poured across one end of the panel
tion of the vapors and unnecessary contact of the solvents with
and the drawdown bar placed behind the coating. The bar is
the skin. Consult the corresponding SDS for the specific
then drawn with uniform pressure and speed along the length
coating to be applied for additional hazards.
of the panel toward the operator to apply a uniform film. The
wet and dry film coating thickness obtained is dependent on the
6. Procedure
combination of the bar used, the volume solids of the coating,
6.1 Deburr panels so edges are smooth. Secure a flat panel
and the speed of the drawdown motion.
to be coated on a firm, uniform, level surface. To provide
sufficient testing surface pour an ample amount of coating
3. Significance and Use
across the top end of the panel. Place the drawdown bar behind
3.1 This practice is useful in the laboratory to simulate
the coating and pull into the coating. Rotate the drawdown bar
roll-coated films.
...
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: D4147 − 99 (Reapproved 2013) D4147 − 18
Standard Practice for
Applying Coil Coatings Using The Wire-Wound Drawdown
1
BarBars
This standard is issued under the fixed designation D4147; 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 practice covers a procedure for applying a coil coating film of uniform thickness on a flat metal panel using the
wire-wound drawdown bar.bars.
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 safety, health, and healthenvironmental practices and determine the
applicability of regulatory limitations prior to use.
1.3 This international standard was developed in accordance with internationally recognized principles on standardization
established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued
by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
2. Summary of Practice
2.1 A flat panel is secured on a firm horizontal surface. An ample amount of coating is poured across one end of the panel and
the drawdown bar placed behind the coating. The bar is then drawn with uniform pressure and speed along the length of the panel
toward the operator to apply a uniform film. The wet and dry film coating thickness obtained is dependent on the combination of
the bar used, the volume solids of the coating, and the speed of the drawdown motion.
3. Significance and Use
3.1 This practice is useful in the laboratory to simulate roll-coated films.
4. Apparatus
4.1 Wire-Wound Drawdown Bars—A set of stainless steel wire-wound drawdown bars of sufficient diameter to prevent bowing
during application. These bars are manufactured so that the diameter of the wire wound on the bar controls thickness of the wet
film applied. The choice of specific drawdown bar is dependent on the dry film thickness required and the volume solids of the
coating under test. Each bar is provided a numeric identifier to help in selecting the correct bar to provide a specific dry film
thickness.
4.2 Devices for Securing Panels:
4.2.1 Magnetic Chuck for securing steel panels to eliminate bowing.
4.2.2 Vacuum Plate for securing very lightweight nonmagnetic panels.
4.2.3 Tape for securing the top of thin-gage panels.
4.2.4 Mechanical Drives,Drives for securing panels and automating the drawdown procedure.
5. Hazards
5.1 The flash points of most solvents used in coatings and related products are low enough that adequate ventilation is needed
to avoid exceeding 25 % of the lower explosive limits of the solvent when preparing and baking the panels. These solvents could
be toxic, care should be taken to avoid inhalation of the vapors and unnecessary contact of the solvents with the skin. Consult the
correspo
...
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: D4147 − 18
Standard Practice for
1
Applying Coil Coatings Using Wire-Wound Drawdown Bars
This standard is issued under the fixed designation D4147; 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 and the volume solids of the coating under test. Each bar is
provided a numeric identifier to help in selecting the correct bar
1.1 This practice covers a procedure for applying a coil
to provide a specific dry film thickness.
coating film of uniform thickness on a flat metal panel using
wire-wound drawdown bars. 4.2 Devices for Securing Panels:
4.2.1 Magnetic Chuck for securing steel panels to eliminate
1.2 This standard does not purport to address all of the
bowing.
safety concerns, if any, associated with its use. It is the
4.2.2 Vacuum Plate for securing very lightweight nonmag-
responsibility of the user of this standard to establish appro-
netic panels.
priate safety, health, and environmental practices and deter-
4.2.3 Tape for securing the top of thin-gage panels.
mine the applicability of regulatory limitations prior to use.
4.2.4 Mechanical Drives for securing panels and automat-
1.3 This international standard was developed in accor-
ing the drawdown procedure.
dance with internationally recognized principles on standard-
ization established in the Decision on Principles for the
5. Hazards
Development of International Standards, Guides and Recom-
mendations issued by the World Trade Organization Technical
5.1 The flash points of most solvents used in coatings and
Barriers to Trade (TBT) Committee.
related products are low enough that adequate ventilation is
needed to avoid exceeding 25 % of the lower explosive limits
2. Summary of Practice
of the solvent when preparing and baking the panels. These
2.1 A flat panel is secured on a firm horizontal surface. An
solvents could be toxic, care should be taken to avoid inhala-
ample amount of coating is poured across one end of the panel
tion of the vapors and unnecessary contact of the solvents with
and the drawdown bar placed behind the coating. The bar is
the skin. Consult the corresponding SDS for the specific
then drawn with uniform pressure and speed along the length
coating to be applied for additional hazards.
of the panel toward the operator to apply a uniform film. The
wet and dry film coating thickness obtained is dependent on the
6. Procedure
combination of the bar used, the volume solids of the coating,
6.1 Deburr panels so edges are smooth. Secure a flat panel
and the speed of the drawdown motion.
to be coated on a firm, uniform, level surface. To provide
sufficient testing surface pour an ample amount of coating
3. Significance and Use
across the top end of the panel. Place the drawdown bar behind
3.1 This practice is useful in the laboratory to simulate
the coating and pull into the coating. Rotate the drawdown bar
roll-coated films.
in the coating to ensure complete wetting of the coating in the
threads of the b
...
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