ASTM D7433-13
(Test Method)Standard Test Method for Measuring Surface Water Absorption of Overlaid Wood-Based Panels
Standard Test Method for Measuring Surface Water Absorption of Overlaid Wood-Based Panels
SIGNIFICANCE AND USE
3.1 Water absorptiveness through the surface of an overlaid panel is a function of various characteristics of the overlay and substrate, including overlay resin content, thickness of the overlay, porosity, and permeability.
3.2 This test method is useful in comparing the water absorption characteristics of different overlaid panel products. The results from this test method are influenced by both the performance of the overlay system and the panel substrate. Therefore, the results are appropriate for comparison of the relative performance of an overlay system when tested over similar or matched panel substrates.Note 1—Panel attributes that may influence water absorption include, but are not limited to, panel type, wood species, face veneer thickness and grade, preoverlay surface treatment such as sanding, particle geometry and compaction ratio.
SCOPE
1.1 This test method covers the determination of the quantity of water absorbed in a specified time through the surface of an overlaid wood-based panel. The test method measures the rate of water gain within a controlled surface area of the overlaid panel surface when exposed to standing water. The method was adapted from the principles of Test Method D5795.
1.2 This test method is applicable to various overlaid wood-based panels including, but not limited to, plywood (such as MDO grades and HDO grades referenced in PS 1–09), oriented strand board, medium density fiberboard, particleboard, and hardboard.
1.3 This test method does not address sampling procedures, number of replications nor performance criteria since those details vary depending upon the purpose of the testing and the type of product. The method is specific to the panel surface and does not evaluate water absorption or edge swell that may occur along panel edges. The method does not consider the variables related to in-service moisture conditions and therefore does not claim to directly relate to water absorption that may occur in actual panel use situations.
1.4 The values stated in SI units are to be regarded as standard. The values given in parentheses are for information only.
1.5 This test method 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 test method to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
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Designation: D7433 − 13
Standard Test Method for
Measuring Surface Water Absorption of Overlaid Wood-
1
Based Panels
This standard is issued under the fixed designation D7433; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope appropriate safety and health practices and determine the
applicability of regulatory limitations prior to use.
1.1 This test method covers the determination of the quan-
tityofwaterabsorbedinaspecifiedtimethroughthesurfaceof
2. Referenced Documents
an overlaid wood-based panel. The test method measures the
2
2.1 ASTM Standards:
rate of water gain within a controlled surface area of the
D5795Test Method for Determination of Liquid Water
overlaid panel surface when exposed to standing water. The
Absorption of Coated Hardboard and Other Composite
method was adapted from the principles of Test Method
Wood Products Via“Cobb Ring” Apparatus
D5795.
D4442Test Methods for Direct Moisture Content Measure-
1.2 This test method is applicable to various overlaid
ment of Wood and Wood-Base Materials
3
wood-based panels including, but not limited to, plywood
2.2 Other Standards:
(suchasMDOgradesandHDOgradesreferencedinPS1–09),
PS 1–09U.S. Voluntary Product Standard, Structural Ply-
oriented strand board, medium density fiberboard,
wood
particleboard, and hardboard.
3. Significance and Use
1.3 This test method does not address sampling procedures,
3.1 Water absorptiveness through the surface of an overlaid
number of replications nor performance criteria since those
panelisafunctionofvariouscharacteristicsoftheoverlayand
details vary depending upon the purpose of the testing and the
substrate, including overlay resin content, thickness of the
typeofproduct.Themethodisspecifictothepanelsurfaceand
overlay, porosity, and permeability.
does not evaluate water absorption or edge swell that may
3.2 This test method is useful in comparing the water
occur along panel edges. The method does not consider the
absorption characteristics of different overlaid panel products.
variables related to in-service moisture conditions and there-
The results from this test method are influenced by both the
fore does not claim to directly relate to water absorption that
performance of the overlay system and the panel substrate.
may occur in actual panel use situations.
Therefore, the results are appropriate for comparison of the
1.4 The values stated in SI units are to be regarded as
relative performance of an overlay system when tested over
standard. The values given in parentheses are for information
similar or matched panel substrates.
only.
NOTE 1—Panel attributes that may influence water absorption include,
1.5 This test method does not purport to address all of the
butarenotlimitedto,paneltype,woodspecies,faceveneerthicknessand
safety concerns, if any, associated with its use. It is the grade,preoverlaysurfacetreatmentsuchassanding,particlegeometryand
compaction ratio.
responsibility of the user of this test method to establish
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
1
This test method is under the jurisdiction ofASTM Committee D07 on Wood Standards volume information, refer to the standard’s Document Summary page on
and is the direct responsibility of Subcommittee D07.03 on Panel Products. the ASTM website.
3
Current edition approved Aug. 1, 2013. Published September 2013. Originally Available from National Institute of Standards and Technology (NIST), 100
approved in 2008. Last previous edition approved in 2008 as D7433–08. DOI: Bureau Dr., Stop 1070, Gaithersburg, MD 20899-1070, http://www.nist.gov/
10.1520/D7433-13. standards
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
D7433 − 13
4. Test Apparatus and Materials 5.2 Specimen Exposure to Water:
5.2.1 Determine the mass of the specimen to an accuracy of
4.1 Rings, formed by cut sections of metal or plastic pipe
0.01 gram. Place the specimen on a level surface. Fill the ring
withinsidediameterofapproximately108mm(4.25in.)which
with water to a depth of 25.4 mm with a tolerance of +0.5/-0.0
canbesealedtotheoverlaidpanelwithsiliconeorelastomeric
mm (1 in., + .02/-0.00 in.). Measure and record the water
sealant.
depth.
4.2 Scale, to measure the depth of water column within 0.5
5.2.2 Cover the ring with aluminum foil or other suitable
mm(0.020in.)accuracy.Thecrosssectionofthescaleshallbe
vapor barrier to prevent evaporation.
as sm
...
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: D7433 − 08 D7433 − 13
Standard Test Method for
Measuring Surface Water Absorption of Overlaid Wood-
1
Based Panels
This standard is issued under the fixed designation D7433; 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 covers the determination of the quantity of water absorbed in a specified time through the surface of an
overlaid wood-based panel. The test method measures the rate of water weight gain within a controlled surface area of the overlaid
panel surface when exposed to standing water. The method was adapted from the principles of Test Method D5795.
1.2 This test method is applicable to various overlaid wood-based panels including, but not limited to, plywood (such as MDO
grades and HDO grades referenced in PS 1–07),PS 1–09), oriented strand board, medium density fiberboard, particleboard, and
hardboard.
1.3 This test method does not address sampling procedures, number of replications nor performance criteria since those details
vary depending upon the purpose of the testing and the type of product. The method is specific to the panel surface and does not
evaluate water absorption or edge swell that may occur along panel edges. The method does not consider the variables related to
in-service moisture conditions and therefore does not claim to directly relate to water absorption that may occur in actual panel
use situations.
1.4 The values stated in SI units are to be regarded as standard. The values given in parentheses are for information only.
1.5 This standard test method 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 test method 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:
D5795 Test Method for Determination of Liquid Water Absorption of Coated Hardboard and Other Composite Wood Products
Via“Cobb Ring” Apparatus
D4442 Test Methods for Direct Moisture Content Measurement of Wood and Wood-Base Materials
3
2.2 Other Standards:
PS 1–071–09 U.S. Voluntary Product Standard, Structural Plywood
3. Significance and Use
3.1 Water absorptiveness through the surface of an overlaid panel is a function of various characteristics of the overlay and
substrate, including overlay resin content, thickness of the overlay, porosity, and permeability.
3.2 This test method is useful in comparing the water absorption characteristics of different overlaid panel products. The results
from this test method are influenced by both the performance of the overlay system and the panel substrate. Therefore, the results
are appropriate for comparison of the relative performance of an overlay system when tested over similar or matched panel
substrates.
NOTE 1—Panel attributes that may influence water absorption include, but are not limited to, panel type, wood species, face veneer thickness and grade,
preoverlay surface treatment such as sanding, particle geometry and compaction ratio.
1
This test method is under the jurisdiction of ASTM Committee D07 on Wood and is the direct responsibility of Subcommittee D07.03 on Panel Products.
Current edition approved Feb. 1, 2008Aug. 1, 2013. Published February 2008September 2013. Originally approved in 2008. Last previous edition approved in 2008 as
D7433–08. DOI: 10.1520/D7433-08.10.1520/D7433-13.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM 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
Available from National Institute of Standards and Technology (NIST), 100 Bureau Dr., Stop 1070, Gaithersburg, MD 20899-1070, http://www.nist.gov/standards
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
D7433 − 13
4. Test Apparatus and Materials
4.1 Rings, formed by cut sections of metal or plastic pipe with inside diameter of approximately 108 mm (4.25 in.) which can
be sealed to the overlaid panel with silicone or elastomeric sealant.
4.2 Scale, to measure the depth of water column
...
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