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This study measures the formaldehyde content (FC) of different types of oriented strand board (OSB) panels. Panels with different thicknesses were produced on the OSB production line of a prominent manufacturer of board composite materials in the Czech Republic. The resins used were polyurethane (PU1, PU2) and melamine-urea-formaldehyde (MUF). The corrected FC from 3-layer OSB/3 panels (MUF/surface, PU2/core) ranged from 5.95 ± 0.42 to 7.24 ± 0.67 mg formaldehyde/100 g of dry board. The corrected FC of the 3-layer OSB panels bonded with PU2 resin ranged between 0.48±0.04 and 0.57±0.11 mg formaldehyde/100 g dry board. Additionally, the corrected FC of 3-layer OSB/3 panels bonded with PU1 resin ranged from 0.09±0.22 to 0.46±0.40 mg formaldehyde/100 g dry board. Furthermore, the corrected FC of 3-layer OSB/4 panels bonded with PU1 resin ranged from 0.178±0.309 to 0.473±0.027 mg formaldehyde/100 g dry board. These results showed that the FC was limited to the natural content of formaldehyde in solid wood, where the values are extremely low, and which resulted in the production of green product. Additionally, the FC of OSB panels bonded with PU1 was lower than that of panels glued with PU2.U istraživanju je provedeno mjerenje sadržaja formaldehida u različitim tipovima ploča s orijentiranim iverjem (OSB). Ploče različitih debljina izrađene su na proizvodnoj liniji poznatog proizvođača pločastih kompozitnih materijala u Republici Češkoj. Pritom su upotrijebljene smole poliuretan (PU1, PU2) i melaminurea-formaldehid (MUF). Korigirani sadržaj formaldehida u troslojnim pločama OSB/3 (MUF/površinski slojevi, PU2/srednji sloj) iznosio je od 5,95 ± 0,42 do 7,24 ± 0,67 mg formaldehida u 100 g suhe ploče. Korigirani sadržaj formaldehida u troslojnim OSB pločama s PU2 smolom kretao se u rasponu između 0,48 ± 0,04 i 0,57 ± 0,11 mg formaldehida u 100 g suhe ploče. Dodatno, korigirani sadržaj formaldehida u troslojnim pločama OSB/3 lijepljenim PU1 smolom iznosio je između 0,09 ± 0,22 i 0,46 ± 0,40 mg formaldehida u 100 g suhe ploče. Nadalje, korigirani sadržaj formaldehida u troslojnim pločama OSB/4 lijepljenima PU1 smolom kretao se u rasponu između 0,178 ± 0,309 i 0,473 ± 0,027 mg formaldehida u 100 g suhe ploče. Ti rezultati pokazuju da je sadržaj formaldehida ograničen na prirodni sadržaj formaldehida u masivnom drvu, pri čemu su vrijednosti iznimno niske, što je rezultiralo proizvodnjom zelenog proizvoda. Sadržaj formaldehida u OSB pločama lijepljenima PU1 smolom bio je manji nego u pločama lijepljenima PU2 smolom

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Measuring the Formaldehyde Content from Different Types of Oriented Strand Board Manufactured with Different Thicknesses and Glued with Different Resins