1.1 本试验方法包括测定在规定时间内通过覆面人造板表面吸收的水量。该试验方法测量了当暴露在静水中时，覆盖面板表面受控表面积内的水分增加速率。该方法根据试验方法的原理进行了修改 D5795 . 1.2 本试验方法适用于各种覆面人造板，包括但不限于胶合板（如PS中引用的MDO等级和HDO等级） 1-09），定向刨花板、中密度纤维板、刨花板和硬质纤维板。 1.3 本试验方法不涉及取样程序、重复次数或性能标准，因为这些细节因试验目的和产品类型而异。该方法针对面板表面，不评估可能沿面板边缘发生的吸水或边缘膨胀。该方法未考虑与在用水分条件相关的变量，因此未声称与实际面板使用情况下可能发生的吸水率直接相关。 1.4 以国际单位制表示的数值应视为标准值。 括号中给出的值仅供参考。 1.5 本试验方法并非旨在解决与其使用相关的所有安全问题（如有）。本试验方法的使用者有责任在使用前建立适当的安全、健康和环境实践，并确定监管限制的适用性。 1.6 本国际标准是根据世界贸易组织技术性贸易壁垒（TBT）委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认标准化原则制定的。 ====意义和用途====== 3.1 覆盖面板表面的吸水性是覆盖层和基材的各种特性的函数，包括覆盖层树脂含量、覆盖层厚度、孔隙度和渗透性。 3.2 该试验方法有助于比较不同覆面板产品的吸水特性。该测试方法的结果受覆盖系统和面板基板性能的影响。因此，当在类似或匹配的面板基板上测试时，结果适用于比较覆盖系统的相对性能。 注1: 可能影响吸水率的面板属性包括但不限于面板类型、木材种类、表面单板厚度和等级、预铺表面处理，如砂光、颗粒几何形状和压实率。

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, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.6 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. ====== 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.