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  • ASTM
    D7433-13 Standard Test Method for Measuring Surface Water Absorption of Overlaid Wood-Based Panels
    Edition: 2013
    $82.37
    Unlimited Users per year

Description of ASTM-D7433 2013

ASTM D7433 - 13

Standard Test Method for Measuring Surface Water Absorption of Overlaid Wood-Based Panels

Active Standard ASTM D7433 | Developed by Subcommittee: D07.03

Book of Standards Volume: 04.10




ASTM D7433

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. 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?109 ), 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.


2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

ASTM Standards

D4442 Test Methods for Direct Moisture Content Measurement of Wood and Wood-Base Materials

D5795 Test Method for Determination of Liquid Water Absorption of Coated Hardboard and Other Composite Wood Products ViaCobb Ring Apparatus

Other Standards

PS 109 U.S. Voluntary Product Standard, Structural Plywood

Keywords

wood-based panels; water absorption; overlays; Cobb Ring;


ICS Code

ICS Number Code 79.060.01 (Wood-based panels in general)


DOI: 10.1520/D7433

ASTM International is a member of CrossRef.

ASTM D7433

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About ASTM

ASTM International, formerly known as the American Society for Testing and Materials (ASTM), is a globally recognized leader in the development and delivery of international voluntary consensus standards. Today, some 12,000 ASTM standards are used around the world to improve product quality, enhance safety, facilitate market access and trade, and build consumer confidence. ASTM’s leadership in international standards development is driven by the contributions of its members: more than 30,000 of the world’s top technical experts and business professionals representing 150 countries. Working in an open and transparent process and using ASTM’s advanced electronic infrastructure, ASTM members deliver the test methods, specifications, guides, and practices that support industries and governments worldwide.
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