Blockboard Selection Guide

In view of the fact that nearly half of the blockboards (commonly known as large core boards) on the market are unqualified, experts from the Product Quality Supervision Department of the General Administration of Quality Supervision, Inspection and Quarantine have recently reminded consumers that they must be carefully identified when purchasing large core boards.

Experts said that the national standard has a lot of quality standards for large core boards, including thickness size, web size, warpage, physical and mechanical properties, material defects, processing defects, moisture content, bonding strength, board surface defects, formaldehyde release limit. Wait. Most of the rigorous testing of these quality indicators needs to be carried out in the laboratory, but consumers can make judgments in some simple and intuitive ways.

First of all, pay attention to whether the appearance is flat and flawless, and the logo is complete. The high-quality large core board should be smooth, without dead knot, excavation, leaking glue, etc. The thickness of the middle board is uniform, there is no overlap, the seam is tight, and the joint of the core board is tight, especially the big core board can not have dry cracking at both ends. Place it upright, the corners should be straight, and the diagonal error should not exceed 6 mm. The entire package of blockboard should fit completely between each board.

Secondly, touch the surface of the blockboard by hand. The high quality blockboard should be dry and smooth.

Finally, check whether the texture of the filled material is dense, whether there are obvious gaps and decaying wood strips. There may be eggs in the decaying wood strips, and insects may occur in the future. At the same time, it depends on whether there is no glue or greasy putty around. This phenomenon is generally to compensate for internal cracks or voids.

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