Three holes expansion test methods have deviation absorbing water thickness expansion rate reflects the substrate water resistant performance. As the substrate of the floor, the water resistant performance should be a furniture is higher, which is very important.
Current aggrandizement is compound the floor of the national standard of aggrandizement is compound the floor of the absorbing water thickness expansion rate test methods 50 x 50 (mm) of the specimen, in 20 ℃ water soak for 24 hours, with the thickness of the specimen center changes before and after soaking, to calculate its absorbing water thickness expansion rate.
In fact, the moisture from the side after immersion of aggrandizement is compound floor, inside the plate moving speed is slow, often specimen edge to the expansion had been very calendar harm, and the center part is not yet inflation, such a change in the thickness of the center of absorbing water thickness expansion rate to calculate its value is small.
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