Bending strength and internal bond strength of wood-based boards subjected to various exposure conditions

Journal of Wood Science

Official Journal of the Japan Wood Research Society

Table 4 Modulus of rupture (MOR) retention and internal bond strength (IB) retention of boards subjected to various exposure conditions

Abbreviations are explained in Table 1. 5-year high humidity, 5-year exposure to relative humidity of 90 %. 5-year cyclic humidity, 5-year exposure to cycles of relative humidity of 45 % at 20 °C for 3 months and 90 % at 20 °C for 3 months (1 cycle: 6 months; 10 cycles:, 5 years). 1-, 3-, and 5-year outdoor, 1-, 3-, and 5-year outdoor exposure in Tsukuba, Japan, respectively. JIS Test B, accelerated aging test in compliance with Test B in JIS A 5908 [21] or JIS A 5905 [22] (boiling for 2 h and subsequent water soaking for 1 h at room temperature). The retention that exceeds 100 % is recorded as 100 %